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Wyszukujesz frazę "materials" wg kryterium: Wszystkie pola


Tytuł:
Packaging Materials in General Technoeducation
Autorzy:
STOFFA, Ján
Powiązania:
https://bibliotekanauki.pl/articles/456010.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Rzeszowski
Tematy:
general technoeducation
packaging materials
packaging materials in general technoeducation
properties of packaging materials
Opis:
The study points to the unused possibility of including the theme of packaging materials in the educational process of general technoeducation It defines the concept of packaging materials in the narrow and broad sense It also characterizes the range of packaging materials used, their advantages and disadvantages. Also it points to specific aspects of packaging materials, in particular to the aspect of economic, health and hygiene, safety, aesthetic and environmental. It also addresses the issue of the impact of external factors on the properties of packaging materials. Epistemological value of packaging materials is illustrated in the case of paper as the most widely used packaging material. On the topic of the paper also some problematic questions are presented.
Źródło:
Edukacja-Technika-Informatyka; 2015, 6, 1; 239-243
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ceramic Porous Preforms Manufactured from Waste Materials
Autorzy:
Kremzer, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2048747.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
composite materials
ceramic preforms
waste materials
fly ashes
Opis:
The goal of this study is to develop a method of manufacturing porous ceramic skeletons used as semi-finished products for reinforcement of composite materials or as filters. For manufacturing skeletons, only waste materials from coal combustion (fly ashes and bottom slags) as well as rubber granules from used tires and car parts were used. These granules were a pore-forming agent that underwent thermal degradation during sintering process. The influence of sintering temperature, portion, and type of rubber granules on the porosity of developed ceramic skeletons was determined. The study of structure of base materials and the developed ceramic skeletons in a scanning electron microscope as well as their X-ray phase analysis were made. Results will allow to predict phases that can be formed on the metal-reinforcement interface during pressure infiltration.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 1; 283-288
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Old materials – new capabilities: lattice materials in structural mechanics
Autorzy:
Augustyniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/281102.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
lattice materials
additive layer manufacturing
specific stiffness
topological optimisation
Opis:
Lattice materials (LM) are a novel concept stemming from the combination of crystallography and structural optimisation algorithms. Their practical applications have become real with the advent of versatile additive layer manufacturing (ALM) techniques and the development of dedicated CAD/CAE tools. This work critically reviews one of the major claims concerning LMs, namely their excellent stiffness-to-weight performance. First, a brief literature review of spatially uniform LMs is presented, focusing on specific strength of standard engineering materials as compared with novel structures. An original modelling and optimisation is carried out on a flat panel subject to combined shear and bending load. The calculated generalised specific stiffness is compared against reference values obtained for a uniform panel and the panel subjected to topological optimisation. The monomaterial, a spatially repetitive solution turns out to be poorly suited for stiff, lightweight designs, because of suboptimal material distribution. Spatially non-uniform and locally size-optimised structures perform better. However, its advantage over manufacturable, topologically-optimised conventional designs can at best be marginal (< 10%). Cubic-cell lattices cannot replace conventional bulk materials in the typical engineering use. The multi-cell-type and multi-material lattice structures, albeit beyond the scope of this article, are more promising from the point of view of mechanical properties. The possibility of approaching the linear scaling reported in the recent litterature can make them an attractive option in ultra-low weight designs.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 213-226
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SCREENSHOTS AND COPYRIGHT
Autorzy:
Nowak, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/955903.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group
Tematy:
authentic materials
copyright
materials' adaptation
exam preparation
Opis:
The present article attempts to show how important and easy it is to use authentic material in the classroom. However, the teacher who copies news reports from the Internet may infringe the copyright law. The article offers a comparative analysis of copyright laws in Common Law countries and the EU countries in relation to fair use. The article tries to determine whether teachers may copy, what teachers may copy, what to do with authentic materials as screenshots and how to adapt them to TELC, KET and PET examination tasks. The Author suggests some reading comprehension and grammar development activities designed using Paint and screenshots.
Źródło:
Teaching English with Technology; 2013, 13, 4; 23-37
1642-1027
Pojawia się w:
Teaching English with Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanoscale Aluminum - Metal Oxide (Thermite) Reactions for Application in Energetic Materials
Autorzy:
Piercey, D. G.
Klapötke, T. M.
Powiązania:
https://bibliotekanauki.pl/articles/358693.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
nano-aluminum
materials
thermites
energetic materials
Opis:
Energetic materials fnd use in both military and civilian applications, however many commonly used materials suffer from serious defciencies including toxicity and high sensitivity. Nanothermites exhibit vastly differing characteristics compared to their well known micron scale relatives and through the use of various preparatory chemical techniques can be tailored to have a wide spectra of chemical and energetic properties. This may allow use as superior replacements of conventional energetic materials in various applications.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 2; 115-129
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Analysis of Physico-Chemical Properties of two Unknown Filter Materials
Autorzy:
Skoczko, I.
Szatyłowicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/952346.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
porous materials
water purification
properties of filtration materials
Opis:
One of the most important technological processes of water treatment is the process of filtration. Scientists and producers keep on searching new filtration materials which allow for better water purification, are simple in exploitation and do not add chemical substances to the treated water. Therefore, the aim of the present study was to analyze physical and chemical parameters of two unknown porous masses X1 and X2. Such physical parameters as color, granulation, bulk density, the equivalent diameter, the coefficient of uniformity and the porosity of the material were measured and determined. Additionally, the possibility of water treatment was studied during the filtration process in the laboratory tests. Chemical parameters were examined in the water flowing through the mass, such as pH, conductivity and COD-Mn as a general indicator of the content of organic substances in the water. Both studied porous masses were characterized by uniform size of particles. But they were not efficient enough in satisfactory reduction of oxygen consumption. Mass X2 slightly better adsorbed organic substances. It was found that the tested unknown mass filter slightly increase the pH of the filtered water.
Źródło:
Journal of Ecological Engineering; 2016, 17, 3; 148-154
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The innovations in description of propriety of structures the hyper-elastic materials
Autorzy:
Żach, P.
Powiązania:
https://bibliotekanauki.pl/articles/247644.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
plastics
hyperelastic materials
numerical simulation
identification of propriety elastomers materials
Opis:
The hyper-elastic materials e.g.: the elastomers, frothed structures PUR about open and closed pores, the materials using the matrix of natural rubber materials whether as well as synthetic the gels be practical used in different engineer applications from over 30 year s. They really several summers and intensive works on field of materiał engineering made possible extension the spectres of uses as well as the utilization of elastomers compositions. In this paper, will be presented built methodology of elasticity propriety materials with large deformation. In article be become presented method of identification and description of hyper-elastic materials from special return on numeric models the attention. Quantitative analysis be becomes executed in support about executed experimental investigations. The numeric permissive on comparison of received conception of description of hyper-elastic material worked out in support about theoretical foundations with results of experimental investigations analyses be become executed.
Źródło:
Journal of KONES; 2010, 17, 3; 533-538
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ablative laser cleaning of materials
Autorzy:
Napadłek, W.
Powiązania:
https://bibliotekanauki.pl/articles/244183.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
laser ablation
cleaning of materials
surface layer
Opis:
On the base of literature data as well as authors works a review of the state-of-the-art in ablative laser cleaning of surface layers of various constructional materials with encrustation produced in physical and technological processes is presented in the paper. The process and mechanisms occurring in the ablative laser cleaning are described. Three types of the most frequently used lasers offer characteristic advantages understood as average power, pulse operation, wavelength, optical feedback with materiał processed, and fiber delivery. The process of surface layer cleaning of materials and machine elements can be carried out in various -ways. In general, when using pulse laser radiation, five different mechanisms of removal of particles, encrustations, or coatings can be applied. So, the process of removal can be performed via following physical processes: surface vibrations, particles oscillations, thermal expansion of particles (or encrustation), generation of so called detonation wave over surface being cleaned, and laser ablation. Lasers are especially useful for removal of layers from many types of substrates like wood, metals, plastics, composites, stones, ceramics, leather, and others. The important advantage of laser cleaning and surface modification is the capability of processing automation which is related to process repeatability, ease of parameters controlling, possibility of strengthening in zones difficult to access, high precision of interaction and high efficiency as well.
Źródło:
Journal of KONES; 2009, 16, 1; 357-366
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surowce odnawialne jako alternatywa do otrzymania biodegradowalnych tworzyw
Renewable raw materials as an alternative to receiving biodegradable materials
Autorzy:
Folentarska, A.
Krystyjan, M.
Baranowska, H. M.
Ciesielski, W.
Powiązania:
https://bibliotekanauki.pl/articles/410310.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
naturalne surowce
surowce odnawialne
skrobia
kompleksy polimerowe
tworzywa biodegradowalne
natural raw materials
renewable raw materials
starch
polymer complexes
biodegradable materials
Opis:
Artykuł stanowi przegląd literaturowy dotyczący surowców naturalnych, odnawialnych, takich jak polisacharydy, białka, tłuszcze, mogących posłużyć jako alternatywa do otrzymania biodegradowalnych materiałów. Omówiono właściwości skrobi jako polisacharydu będącego surowcem biodegradowalnym i pozyskiwanym ze źródeł odnawialnych. Opisano kompleksy polimerowe oparte na skrobi jako przyszłościowe tworzywa biodegradowalne wykorzystywane w różnych dziedzinach przemysłu.
The article is a review of the literature concerning natural and renewable raw materials, such as polysaccharides, proteins, fats, which can be used as an alternative to obtain biodegradable materials. Properties of the starch as a polysaccharide which is a raw biodegradable material harvested from renewable resources were discussed. Polymer complexes based on the starch in the various systems as future biodegradable materials used in various industries were described.
Źródło:
Chemistry, Environment, Biotechnology; 2016, 19; 121-124
2083-7097
Pojawia się w:
Chemistry, Environment, Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions of materials choice in manufacturing of pressure originated details
Autorzy:
Muiznieks, G.
Gerins, E.
Powiązania:
https://bibliotekanauki.pl/articles/386410.pdf
Data publikacji:
2008
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
materiałoznawstwo
testowanie materiałów
właściwości mechaniczne
materials technology
materials testing
mechanical properties
Opis:
Materials are evolving today faster than at any time in history. In nowadays developing a technique and technology considerably enlarge the exposure of the applicable materials, new materials are created still with much better mechanical and technological properties. Their development and prevalence quickly increase. Today wide use such materials that still recently call by future materials. In the several responsible engineering industry, as well as instrument engineering and other industries do better with “high – performance” composites, new engineering ceramics, high – strength polymers etc., what had previously been done with metals. Choosing of materials is very important in several engineering industries, construction and instrument engineering industries, for example, crash of bench constructions is one of the reasons that the engineer who designed them used wrong materials or did not understand the properties of those used. Therefore for rational utilization materials, we need to know not only their properties, but also need understand factors, witch provides this properties. Therefore we should know how to select materials which best fit the demands of the design – economic and aesthetic demands, as well as demands of strength and durability. Choice of materials of pressure originated details, as also many manufacturing of other important details, which is one of the most actual problems in nowadays. First of all this article shows advantages and disadvantages of the conditions of materials choice of pressure originated details in. The most rational conditions of materials choice, way how to eliminate possibility mistakes, witch can lead down to different difficulties are given for the manufacturing of the definite group of details. There is an example witch describes conditions of materials choice for oil flooded screw compressors. The denotations of different standards of the utilized materials are analyzed in this article. As well as the economic parameters of the various materials in the manufacturing of the oil flooded screw compressors are analyzed. At the end of the article are given possibilities of the improving of materials. We can achieve improving of materials with different materials processing methods, which I had analyzed, for example, using mechanical, thermal, thermal-chemical processing or using different surfaces covering. In nowadays thermal processing method based on metal physic, dislocation theory and changes of metal structure regularity. These processing methods improve physical and mechanical properties of materials.
Źródło:
Acta Mechanica et Automatica; 2008, 2, 4; 75-80
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contact materials used in low voltage electrical relays
Autorzy:
Książkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/97273.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
contact materials
relays
rivets
Opis:
Low-voltage relays are widely used in many areas of electrical applications. There are used for such applications as protection, signalization or control of electrical installations. There all are similar in many ways were it comes to construction and operating principles. However for different applications different contact materials must be used. There are many materials used for contacts in electrical appliances. In this paper contact materials used especially in low-voltage electromechanical relays are described. Their electrical and mechanical properties are characterised.
Źródło:
Computer Applications in Electrical Engineering; 2015, 13; 300-309
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moulds in biodeterioration of technical materials
Autorzy:
Gutarowska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/764972.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
moulds
biodeterioration
technical materials
biocides
disinfection
Opis:
Pleśnie są mikroorganizmami, które odgrywają kluczową rolę w biodeterioracji materiałów technicznych, co wynika z ich cech fizjologicznych i metabolizmu. Materiał techniczny stanowi dla nich albo źródło węgla i energii (drewno, papier, tekstylia, paliwa, skóra) albo jest podłożem do ich wzrostu (cegły, kamień, metal, szkło). Grzyby charakteryzujące się wysoką aktywnością biodeterioracyjną - enzymatyczną i kwasotwórczą należą głównie do Aspergillus, Penicillium, Trichoderma, Cladosporium, Paecilomyces i Chaetomium. Przedstawiciele niektórych rodzajów grzybów (oprócz wymienionych powyżej, również m.in. Stachybotrys, Alternaria, Cladosporium, Epidermophyton, Microsporum, Scopulariopsis, Trichophyton) rosnąc na substancji technicznej oraz wytwarzając alergeny i mykotoksyny stwarzają zagrożenia zdrowotne. Dlatego na podstawie wiedzy na temat warunków rozwoju pleśni i mechanizmów biodeterioracji należy odpowiednio zabezpieczać materiały przed rozwojem grzybów. Istotne jest również poszukiwanie nowych, bezpiecznych dla materiałów technicznych metod dezynfekcji w celu zahamowania rozwoju grzybów. Zastosowanie biocydów w celach ochronnych należy ograniczyć jedynie do materiałów najbardziej narażonych na biodeteriorację (papier, tekstylia, paliwa, farby), mając na uwadze aspekty ochrony środowiska, a także produkcję materiałów biodegradowalnych, zapewniając cykl życia produktu.
Moulds are microorganisms which play the key role in biodeterioration of technical materials which results from their physiological features and metabolism. Technical materials constitute the source of carbon and energy (wood, paper, textiles, fuels, leather) or the surface for fungal growth (bricks, stone, metal, glass). Moulds characterized by a high biodeterioration activity – enzymatic and acidic, belong mainly to the following genera: Aspergillus, Penicillium, Trichoderma, Cladosporium, Paecilomyces and Chaetomium. Members of some taxa (besides the aforementioned also e.g. Stachybotrys, Alternaria, Epidermophyton, Microsporum, Scopulariopsis, Trichophyton) growing on technical substances and producing allergens and mycotoxins cause health hazards. Therefore, basing on the knowledge about conditions for mould development and biodeterioration mechanisms, we should appropriately preserve materials against mould growth. Looking for new disinfection methods safe for technical substances in order to inhibit mould growth is also important. Protective applications of biocides should be limited only to materials most sensitive to biodeterioration (paper, textiles, fuels, paints). On the one hand we should take into consideration environmental protection, on the other production of durable, biodegradable materials ensuring the product life cycle.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2014, 10; 27-39
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NORM in building materials
NORM w materiałach budowlanych
Autorzy:
Chingiz, A.
Powiązania:
https://bibliotekanauki.pl/articles/340256.pdf
Data publikacji:
2004
Wydawca:
Główny Instytut Górnictwa
Tematy:
materiały budowlane
naturalne źródła promieniowania
ochrona radiologiczna
building materials
naturally occuring radioactive materials
radiological protection
Źródło:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 26-27
1643-7608
Pojawia się w:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical, Strategic and Deficit Raw Materials in the Waste of Electrical and Electronic Equipment and in Batteries and Accumulators
Autorzy:
Witkowska-Kita, Beata
Biel, Katarzyna
Blaschke, Wiesław
Orlicka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/318573.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
waste electrical and electronic equipment (WEEE)
batteries and accumulators
recyclable materials
critical raw materials
strategic raw materials
deficit raw materials
Opis:
This article presents the waste electrical and electronic equipment and batteries and accumulators as a potential source of critical, strategic and deficit raw materials. The dominant types of waste obtained after the disassembly of used electrical and electronic equipment are plastics: polypropylene (PP), acrylonitrile-butadiene-styrene (ABS), polystyrene (PS) and teflon and metals. These metals include: magnesium, cobalt, antimony and tantalum (critical raw materials), aluminum, nickel, iron and zinc (strategic raw materials) as well as copper and silver (deficit resources), as well as lead, tin, gold and cadmium. Batteries and accumulators are a source, among others metals such as: nickel and zinc (strategic raw materials), manganese and lithium (deficit resources), aluminum (strategic raw material), and cadmium, lead. The article presents the results of analysis of the material composition of the waste electrical and electronic equipment conducted at the Institute of Mechanised Construction and Rock Mining. It also presents the level of imports and exports of waste and scrap-metal that are the subject of this article. In addition, the article presents a source of information about waste and recycled materials.
Źródło:
Inżynieria Mineralna; 2019, 21, 1; 189-194
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accelerators in materials research
Autorzy:
Turos, A.
Powiązania:
https://bibliotekanauki.pl/articles/147928.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
materials research
accelerators
ion beam modification
ion beam analysis
Opis:
Abstract Since at least forty years accelerators of charged particles no longer belong to nuclear physics exclusively. This is especially true for accelerators at energies below 1 GeV. The vast majority of accelerators in this energy range is used for materials research and medicine. In materials research the applications are principally twofold: modifications of solids and surface layer microanalysis. Two most important challenges for materials research at the beginning of XXI century as determined by the Materials Research Society are: development of materials able to repair human body and development of materials for new electronic devices able to cope with the enormous amount of information to be stored and transmitted. The role of accelerators with regard to the challenges of modern technology will be discussed.
Źródło:
Nukleonika; 2005, 50,suppl.3; 11-15
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zagrożenie pożarowe autokarów powodowane przez materiały wyposażenia
Coaches fire hazard caused by the equipment materials
Autorzy:
Dobrzyńska, R.
Powiązania:
https://bibliotekanauki.pl/articles/136944.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Służby Pożarniczej
Tematy:
zagrożenie pożarowe
właściwości palne materiałów
badania ogniowe materiałów
kryteria doboru materiałów
fire safety
properties of flammable materials
materials fire testing
criteria for materials selection
Opis:
Według danych statystycznych [1], pożary środków transportu drogowego stanowią ok. 7% udziału liczby wszystkich pożarów w Polsce i zajmują drugie miejsce po pożarach obiektów mieszkalnych. Najczęściej dochodzi do pożaru samochodów ciężarowych i osobowych, ale istotnym problemem są także pożary autokarów, ze względu na liczbę przewożonych ludzi. Na przebieg ewakuacji i skuteczność akcji gaśniczej mają wpływ zastosowane wewnątrz pojazdu materiały. Najczęściej pożar rozwija się bardzo szybko i nawet, jeśli pasażerom uda się opuścić pojazd bez uszczerbku dla zdrowia, to autokar ulega doszczętnemu spaleniu. Zdarzają się jednak także takie przypadki, w których dochodzi do śmierci pasażerów, bo płomienie są tak silne, że dotarcie do pozostałych w pojeździe osób jest niemożliwe. Na zagrożenie pożarowe i przebieg pożaru autokaru mają wpływ zastosowane materiały wyposażenia. Przeprowadzono badania materiałów stanowiących elementy foteli autokarowych, określono ich topliwość oraz szybkość spalania pionowego. Od tych właściwości zależy przebieg pożaru autokaru i skuteczność działań ratowniczo-gaśniczych.
According to the statistics [1], the fires of road transport vehicles account for around 7% of the total number of fires in Poland and are the second most common after the fires of residential buildings. Most often, the fire occurs in the trucks and passenger cars, but the fire of coaches is also a significant issue because of the number of people being transported. The course of the evacuation and the effectiveness of fire extinguishing are influenced by the materials used inside the vehicle. Predominantly, the fire develops very quickly , and, even if passengers are able to leave the vehicle without compromising their health, the bus is completely burned down. Nevertheless, the cases of passenger casualties do happen, as the flames are so strong that it is impossible to reach the people remaining in the vehicle. The materials used in the interior have crucial impact on the fire. The coach seat materials have been investigated in order to establish their fusibility and vertical burning rate. These characteristics of materials affect the course of the coach fire and the effectiveness of rescue and firefighting activities.
Źródło:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2018, 2, 65; 7-21
0239-5223
Pojawia się w:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibrational spectroscopy investigation of montmorillonite-chitosane nanocomposite materials
Autorzy:
Paluszkiewicz, C.
Stodolak, E.
Powiązania:
https://bibliotekanauki.pl/articles/283827.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
spectroscopy
chitosan
nanocomposite materials
Opis:
Biomaterials basing on natural polysaccharides, i.e. hiauronic acid, alginate, chitosane are an alternative for already applied bioresorbable synthetic materials basing on synthetic polyhydroxy acids. Their main advantages are good accessibility, low cost, easy forming and high biocompatibility. Additionally , they are a perfect matrix for bioactive nanoparticles i.e. hydroxy apatite (HAp), tricalcium phosphate (TCP) and silica (SiO2). The work presents results of research on nanocomposite consisting of chitosane matrix (CS) modified with a nanofiller, which was natural montmorillonite (MMT). Nanocomposite foils were produced by the casting method. In order to induce better biocompatibility, the surface of the CS/MMT composite was neutralized (bath in NaOH solution). The nanocomposite foils were subjected to a bioactivity test by incubation in SBF at 37oC for 7 days. It was observed that the CS/ MMT material surface showed a local supersaturation, which was a result of apatite nucleation. The CS/ MMT nanocomposites were investigated using FT-IR ( Fourier Transform Infrared Spectroscopy) and Fourier Raman Spectroscopy. FTIR measurements o f the samples were carried out on the transmission and reflection modes. The FTIR microscopy spectra were collected using BioRad Excalibur with ATR attachment as well as microscope UMA500 equipped with MCT detector. Spectra were measure at 4 cm -1 resolution in the region from 4 000 cm -1 to 600 cm -1 . FT-Raman spectra were obtained using a FTS 6000 Bio-Rad spectrometer with Ge detector. The samples were excited with a Nd-YAG laser (1064nm). Additional all materials in all steps experiments were observed under Scanning Electron Microscopy (Nova Nano SEM). Vibrational spectroscopy methods (FT Raman and FTIR) can be used for investigation of nanocomposite foils basing on biopolymers. High sensitivity the applied spectroscopy techniques show that in the result of the neutralization of CS/ MMT foil (via incubation in NaOH solution the biopolymer chain breaks. This phenomena is visible by intensity ratio between COC/COH bands. Increase of reactivity of chitosane chain lead to entrapment of PO4+3-, which is the origin of the apatite forms nucleation process. Chemical treatment of the nanocomposite foils, i.e. NaOH washes in fluences their chemical structure and microstructure. Neutralisation of the foils is the first processing stage which precedes the potential use o fCS/ MMT foils in biomedical applications. The materials show a tendency to apatite crystallisation which may support regeneration of damaged bone tissue. The applied spectroscopic methods allowed to observe changes in the whole volume of the sample. Individual ATR measurements taken at various spectral ranges and penetration depths allow to observe subtle changes in the polymer matrix caused by chemical treatment (NaOH and SBF incubation). Results of the investigations indicate that in the CS/ MMT systems new chemical bonds and related to them vibrations appear. Quantity and quality of the interact ions is related to characteristics of the nanoparticle and the presence of forming apatite structures.
Źródło:
Engineering of Biomaterials; 2011, 14, no. 109-111 spec. iss.; 44
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart materials as modern engineering substances
Autorzy:
Ćwikła, A.
Powiązania:
https://bibliotekanauki.pl/articles/102897.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
smart materials
piezoceramics
shape memory alloys
aviation
medicine
Opis:
The article presents the type and use of intelligent materials in aviation and medicine. Their basic features and properties have been discussed. Moreover, the authors quote examples of different uses of intelligent materials, both the existing ones and those in design and development stages. Their use is claimed to be increasing the efficiency and reliability of processes and equipment as well as facilitates the development of new mechanisms.
Źródło:
Advances in Science and Technology. Research Journal; 2013, 7, 17; 66-72
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of selected contact materials used in low-voltage relays
Autorzy:
Książkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/378085.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
contact materials
relays
rivets
Opis:
Low-voltage relays are widely used in many areas of electrical applications. There are used for such applications as protection, signalization or control of electrical installations. There all are similar in many ways were it comes to construction and operating principles. However for different applications different contact materials must be used. There are many materials used for contacts in electrical appliances. In this paper contact materials used especially in low-voltage electromechanical relays are described. Their electrical and mechanical properties are characterised.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2015, 82; 207-212
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burden Optimisation of Lump Charge Materials for Foundry Furnaces
Autorzy:
Ziółkowski, E.
Powiązania:
https://bibliotekanauki.pl/articles/355733.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
burden of lump chargé materials
Opis:
Calculation of economically optimum charge burden for foundry furnaces depends on a solution that can be found in the field of mathematical linear programming. A traditional linear optimisation method means looking for continuous variables that can define portion of every charge component. Sometimes, it can be observed that a calculated portion of charge material with a defined lump mass is rounded up, which is wrong because the charge burden prepared in such a way may either show a mistaken chemical composition, or it can entail a significant cost. With charge materials characterised by defined mass lumps, it is recommended to use a modified method of integer linear optimisation. This article contains definitions of a goal function and a system of constraints considering the charge materials as stated above. In addition, a sample calculation has been included hereto to show such optimisation for a selected process of metal melting in a casting furnace.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2217-2221
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Requirements regarding safety maritime transport of explosives materials
Autorzy:
Chmieliński, M.
Powiązania:
https://bibliotekanauki.pl/articles/117329.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
maritime transport of goods
safety maritime transport
explosives materials
IMDG Code
dangerous goods
transport
hazardous materials
explosive ordnance
Opis:
Author of this publication identifies safety requirements regarding maritime transport of dangerous goods class 1. Various modes of transport are used to hazardous materials that often include maritime transport of hazardous materials, such as explosives. Dangerous Goods’ refers to items that are potentially dangerous during transportation. The above paper is based of techniques in ship operations, as well as the desirability of having more comprehensive recommendations which included dangerous goods. Dangerous goods have special transport requirements to eliminate or minimize the risk of injuring people or damaging property and the environment. The Recommendations are aligned with relevant IMO codes and the IMDG Code in particular. The above article is based on the results of safety research on maritime transport of hazardous materials, as Sworn Expert of the Polish Chamber of Maritime Commerce.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 1; 115-120
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bursztyn jako surowiec strategiczny
Amber as a strategic raw material
Autorzy:
Szamałek, K.
Powiązania:
https://bibliotekanauki.pl/articles/2085916.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
bursztyn
surowiec strategiczny
surowiec deficytowy
surowiec krytyczny
amber
strategic raw materials
critical raw materials
deficit raw materials
Opis:
Znaczenie i rola surowca mineralnego w gospodarce kraju czy świata jest dostrzegalna w używanych określeniach: surowiec deficytowy, krytyczny lub strategiczny. ustalenie ważności surowca w procesach gospodarczych, wiedza o źródłach jego pozyskiwania, barierach dostępu, kształtowaniu ceny na rynkach krajowym i międzynarodowym pozwalają na opracowanie strategii działania, w której należy uwzględnić cel działań, horyzont czasowy, rodzaj niezbędnych do zastosowania instrumentów i zakres współpracy międzynarodowej. O znaczeniu surowca dla kraju decyduje nie tylko wolumen obrotów i wielkość produkcji uzyskiwanej dzięki jego zastosowaniu, lecz także względy historyczne, kulturowe i społeczne. Tak jest w przypadku bursztynu. Autor przedstawia argumenty przemawiające za uznaniem bursztynu w Polsce za surowiec o znaczeniu strategicznym i wskazuje na konieczność wprowadzenia efektywnych instrumentów, które zapewnią jego dalsze pozyskiwanie i wykorzystanie.
The importance and the role of minerals in the economy of a country or the world is manifested by the use of the following terms: scarce mineral, critical mineral, and strategic mineral. Validity of the raw material in the economic processes and the knowledge about the sources of its acquisition, access barriers, and the shaping of prices on the domestic and international market allow developing a strategy for action. The strategy must take into account the objective of the action, time horizon, kind of the instruments needed to apply, and scope of international cooperation. The importance of the raw material for the country is not only the volume of turnover and volume of production obtained thanks to its application. This also means its importance for historical, cultural and social reasons, which is the case with amber. The author presents arguments in favour of both considering amber in Poland as a raw material of strategic importance and the necessity for introducing effective instruments to ensure its further extraction and use.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2016, 466; 291-295
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Past Perfect in Corpora and EFL/ESL Materials
Autorzy:
Vandenhoek, Tim
Powiązania:
https://bibliotekanauki.pl/articles/620610.pdf
Data publikacji:
2018-06-07
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
corpus
ESL
EFL
materials
past
perfect
Opis:
Corpora provide teachers and materials developers with the ability to ensure that the instructions they use in class and in teaching materials correctly reflect natural use. This paper examines the ways in which grammar reference books and two types of EFL/ESL materials present the past perfect aspect and whether they do so accurately. It will be argued that there are several issues concerning how these books present the grammar point. Many of the books surveyed provide incomplete explanations of when and how the form is used and several contain usage guidelines that are not supported by available corpus data. The paper ends with several recommendations to improve how the form is presented to teachers and learners.
Źródło:
Research in Language; 2018, 16, 1
1731-7533
Pojawia się w:
Research in Language
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibrational spectroscopy investigation of montmorillonite - chitosane nanocomposite materials
Autorzy:
Paluszkiewicz, C.
Stodolak, E.
Powiązania:
https://bibliotekanauki.pl/articles/283761.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomaterials
nanocomposite materials
vibrational spectroscopy
Opis:
Biomaterials basing on natural polysaccharides, i.e. hiauronic acid, alginate, chitosane are an alternative for already applied bioresorbable synthetic materials basing on synthetic polyhydroxyacids. Their main advantages are good accessibility, low cost, easy forming and high biocompatibility. Additionally, they are a perfect matrix for bioactive nanoparticles i.e. hydroxyapatite (HAp), tricalcium phosphate (TCP) and silica (SiO2). The work presents results of research on nanocomposite consisting of chitosane matrix (CS) modified with a nanofiller, which was natural montmorillonite (MMT). Nanocomposite foils were produced by the casting method. In order to induce better biocompatibility, the surface of the CS/MMT composite was neutralized (bath in NaOH solution). The nanocomposite foils were subjected to a bioactivity test by incubation in SBF at 37oC for 7 days. It was observed that the CS/MMT material surface showed a local supersaturation, which was a result of apatite nucleation. The CS/MMT nanocomposites were investigated using FT-IR (Fourier Transform Infrared Spectroscopy) and Fourier Raman Spectroscopy. FTIR measurements of the samples were carried out on the transmission and reflection modes. The FTIR microscopy spectra were collected using Bio-Rad Excalibur with ATR attachment as well as microscope UMA500 equipped with MCT detector. Spectra were measured at 4 cm-1 resolution in the region from 4000 cm-1 to 600 cm-1. FT-Raman spectra were obtained using a FTS6000 Bio-Rad spectrometer with Ge detector. The samples were excited with a Nd-YAG laser (1064nm). Additional all materials in all steps experiments were observed under Scanning Electron Microscopy (Nova NanoSEM). Vibrational spectroscopy methods (FT Raman and FTIR) can be used for investigation of nanocomposite foils basing on biopolymers. High sensitivity the applied spectroscopy techniques show that in the result of the neutralization of CS/MMT foil (via incubation in NaOH solution) the biopolymer chain breaks. This phenomena is visible by intensity ratio between COC/ COH bands. Increase of reactivity of chitosane chain lead to entrapment of PO43-, which is the origin of the apatite forms nucleation process. Chemical treatment of the nanocomposite foils, i.e. NaOH washes influences their chemical structure and microstructure. Neutralisation of the foils is the first processing stage which precedes the potential use of CS/MMT foils in biomedical applications. The materials show a tendency to apatite crystallisation which may support regeneration of damaged bone tissue. The applied spectroscopic methods allowed to observe changes in the whole volume of the sample. Individual ATR measurements taken at various spectral ranges and penetration depths allow to observe subtle changes in the polymer matrix caused by chemical treatment (NaOH and SBF incubation). Results of the investigations indicate that in the CS/ MMT systems new chemical bonds and related to them vibrations appear. Quantity and quality of the interactions is related to characteristics of the nanoparticle and the presence of forming apatite structures.
Źródło:
Engineering of Biomaterials; 2010, 13, no. 99-101; 128
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polymeric materials – selected standards and biological research methods
Autorzy:
Agnieszka Richert, Agnieszka Richert
Powiązania:
https://bibliotekanauki.pl/articles/1179539.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
biocide
biofilm
mutagenicity
polymer materials
Opis:
The purpose of this paper is to present the standards and the research methods enabling biological examination of polymeric materials or active packaging. These procedures apply to polymeric materials containing additives such as bactericides and fungicides.
Źródło:
World Scientific News; 2017, 76; 166-172
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemiczne materiały odniesienia
Chemical reference materials
Autorzy:
Szewczyk, H.
Powiązania:
https://bibliotekanauki.pl/articles/153596.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
certyfikowany materiał odniesienia
spójność pomiarowa
certified reference materials
traceability
Opis:
W referacie opisano złożoność problemu zapewnienia spójności pomiarowej pomiarach chemicznych. Podkreślono rolę certyfikowanych materiałów odniesienia CRM w pracy laboratorium chemicznego. W pracy podkreślono wymagania normy PN-EN ISO/IEC 17025:2005 dotyczące zapewnienia spójności pomiarowej w przypadku, gdy wzorcowania lub badania nie mogą być wykonane ściśle w jednostkach SI. Zwrócono uwagę na podstawową różnicę wynikającą ze sposobu zachowania spójności pomiarowej w pomiarach wielkości chemicznych w stosunku do pomiarów wielkości fizycznych. Zaprezentowano certyfikowane materiały odniesienia CRM wytwarzane w Pracowni Wzorców Chemicznych Wydziału Chemii Analitycznej i Fizykochemii Okręgowego Urzędu Miar w Łodzi, ze szczególnym zwróceniem uwagi na proces wytwarzania i certyfikowania roztworów wzorcowych, na które uzyskano akredytację.
The complexity of traceability problem in the chemical measurements has been described in the paper. Role of the certified reference materials CRM in the activity of chemical laboratory has been emphasized. In the paper the requirements of PN-EN ISO/IEC 17025:2005 Standard have been emphasized, concerning the assurance of measurement traceability in case when calibrations or examinations can not be carried out in the SI units. Special attention has been paid to the basic difference resulting from the manner of preservation of measurement traceability in the chemical quantities with relation to the physical quantity measurements. Metrological hierarchy of reference materials used in the research of accredited chemical laboratory has been shown. Certified reference materials CRM, produced in the Chemical Standard Laboratory of Analytical Chemistry and Physicochemical Department of Regional Measurement Office in Lodz have been presented, with special attention paid to the process of production and certification of standard solutions, which obtained the accreditation.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 12, 12; 1565-1567
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Funkcjonalne hybrydowe nanomateriały - od pomysłu poprzez laboratorium do biznesu
Functionalized hybrid materials-from concept, through laboratory to business
Autorzy:
Schroeder, G.
Łęska, B.
Kurczyńska, J.
Powiązania:
https://bibliotekanauki.pl/articles/1208054.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
receptory molekularne
chemia materiałowa
funkcjonalizowane materiały
nanomateriał
materiały hybrydowe
molecular receptors
materials chemistry
functionalized materials
nanomaterials
hybrid materials
Opis:
Funkcjonalne materiały na bazie receptorów molekularnych, to nowy dynamicznie rozwijający się kierunek w chemii. Poznanie zasad wzajemnego oddziaływania cząsteczek, opanowanie wydajnych metod syntezy oraz umiejętność przewidywania właściwości materiałów zawierających receptory molekularne, stworzyły realne podstawy do realizacji projektów od pomysłu, poprzez badania podstawowe do komercyjnego zastosowania. W artykule przedstawiono drogę od idei do materiału użytkowego, którego właściwości zależą od natury receptora molekularnego. Dla wybranych układów przedstawiono komercyjne zastosowanie hybrydowych nanomateriałów nieorganiczno-organicznych.
Functionalized materials, based on molecular receptors, determine new direction of dynamic development in chemistry. The knowledge about interactions between molecules, the control of efficient synthesis methods and the ability of properties prediction of materials carrying molecular receptors, generate real foundation for the fulfillment of projects started from the concept, through the research studies, to commercial application. The paper describes the way from the idea to the material, which properties depend on the nature of a molecular receptor. It also includes commercial applications of some hybrid inorganic-organic nanomaterials.
Źródło:
Chemik; 2012, 66, 3; 196-205
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energetics. Available materials
Autorzy:
Zdanowski, Sylwester
Powiązania:
https://bibliotekanauki.pl/articles/2041690.pdf
Data publikacji:
2012-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Opis:
Little more optimistic predictions state that prices will rise. How fast depends from resource supplies. To slow it down we have to forget about using X% of sun energy in 50 years. Solutions decreasing oil usage in power plants and transport wont eliminate it complicity but will allow to buy time necessary to replace oil in other branches of economy. Otherwise agrarian revolution which made T. Malthus predictions ridiculous will have to bow before his vision. Today we have chance to see this problem before global peak oil thanks to speculative bobble, which lead many to bankruptcy. Future depends on biggest countries policy and research in public domain. Especially those with every day knowledge can influence our future. For one by voting for best representatives that will improve politic. Next by supporting public domain in search for solutions. Finally and most importantly by every day actions. Decisions that create energy usage like turning on computer or choosing private car instead of public transport. But many every day things requires a lot of knowledge to notice. This fact alone brings issue of energy like many others back to education process.
Źródło:
Reality of Politics; 2012, 3; 268-287
2082-3959
Pojawia się w:
Reality of Politics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of abrasive wear of selected aircraft materials in various abrasion conditions
Autorzy:
Krzyżak, A.
Mucha, M.
Pindych, D.
Racinowski, D.
Powiązania:
https://bibliotekanauki.pl/articles/242294.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
composite materials
tribology
carbon fibre reinforced polymer
CFRP
aerospace materials
Opis:
The use of composite materials is continuously increasing in modern transport. This process is especially noticeable in aviation. The mass percentage of epoxy resin composites in contemporary aircraft constructions is usually higher than 50%, and these materials must meet increasingly demanding requirements. In these circumstances, in addition to mass and strength, it is necessary to predict other properties of the material, such as abrasion resistance. The article presents the analysis of the process of abrasion of carbon fibre reinforced polymers reinforced with various fillers. Straight carbon fibre mats were used for the tests. In addition, powders of pumice, alumina, silicon carbide, and glass microspheres at various concentrations in relation to the matrix were used as fillers. In order to investigate the influence of external factors on the abrasion process, each group of samples was subjected to abrasion under different external conditions: in an insulated environment, in the presence of water and loose abrasives: brown fused alumina (BFA) and white fused alumina (WFA). The measurements were carried out using a precision balance and an electron microscope. The results allow concluding on which kind of filler and in what concentration contributes to improvement of the abrasion resistance of the composite material the most. In addition, it was found that the conditions in which abrasion occurs have a very large impact on the course of this process.
Źródło:
Journal of KONES; 2018, 25, 4; 217-222
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The New Methodology for Assessing of the Applicability of Elastomeric Materials in the Vibration Isolation Systems of Railway Lines
Autorzy:
Bednarz, J.
Powiązania:
https://bibliotekanauki.pl/articles/176943.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
vibration isolation systems
elastomeric materials
properties of flexible materials
Opis:
The technical requirements for the determination of physical parameters of vibration isolating material have not been standardized in Europe and Poland yet, which significantly hinders the ability to compare vibration isolating materials offered on the market. Therefore, there is a need for establishing a norm that could be applied both for the determination of the physico-mechanical properties of elastic vibration isolation elements in rail transport for domestic and foreign producers as well as in their selection for application in a specific vibration isolation system. The paper presents a proposal to standardize the methodology of the estimation of vibration isolation materials physical parameters authorized for use in vibration isolation systems used in rail transport. Methodology for measuring the physico-mechanical parameters of vibration isolating material presented in the paper forms uniform test procedure developed based on a fragmentary norms for flexible materials testing. The use of the proposed research methodology enables the creation of a unified database of elastic materials which parameters will be easy to compare, and choice between them will become easier for designers of vibration isolation systems used in rail transport.
Źródło:
Archives of Acoustics; 2016, 41, 3; 573-578
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon permeability of insulating building materials
Autorzy:
Walczak, J.
Olszewski, J.
Zmyślony, M.
Powiązania:
https://bibliotekanauki.pl/articles/146486.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
insulating building materials
permeability
radon
transmittance
Opis:
The aim of the study was to determine the radon permeability coefficient of insulating building materials. Eleven insulating materials were tested. A research setup was developed and it was as follows: a tested material was tightly set on the receiver box’s hole and placed into the radon chamber. The measurements showed that for various insulating materials, radon permeability coefficient varies from 1.26 × 10−10 m2/s for film-like materials to 9.95 × 10−8 m2/s for roofing papers. According to our calculations of all insulating materials, the foil-type insulating materials to ensure the best protection against radon flow from the ground. Comparison of different types of building materials shows that the insulating building materials ensure better radiological protection than regular building constructions materials.
Źródło:
Nukleonika; 2016, 61, 3; 289-293
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of construction materials in unmanned aerial vehicles
Autorzy:
Adamski, M.
Powiązania:
https://bibliotekanauki.pl/articles/245052.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
Unmanned Aerial Vehicle
UAV
construction materials
material properties
Opis:
The design process is mostly connected with a proper selection of construction materials. Newly designed UAVs must undergo assessment in terms of performed tasks, range or fuel consumption. A significant influence upon the selection of materials, which are long lasting and resistant to damage, is exerted by the conditions of work of Unmanned Aerial Vehicles. They mainly execute their tasks at high altitudes with high speeds, where temperature and pressure differences may extensively damage not only the airframe skin, but also the equipment and the propulsion system itself. The aim of this study is to present the characteristics of materials currently used as well as their assessment in employed construction elements of UAVs. Polymer composites are superior to Al and Ti alloys, steel within the parameters of tensile strength and stiffness. As for the density gradient, polymer carbon fibre composites exceed glass fibre composites, also under cyclically variable loads. Glass fibre composites during tensile testing show higher values and a higher capability of absorbing energy under static and dynamic forces. Polymer matrix composites, reinforced with Kevlar, are less stiff than carbon-fibre composites, due to lower values of elasticity modulus, however they demonstrate higher impact load. Strength tests provide valuable data concerning the properties of a given material, such as tensile modulus E [MPa], tensile strength UTS [MPa], or resistance to high temperatures. It must be noted that these properties significantly affect the functioning of the airframe and its components.
Źródło:
Journal of KONES; 2016, 23, 3; 11-17
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Actual challenges, opportunities, and perspectives of composite materials
Autorzy:
Bosacka, Alicja
Zienkiewicz-Strzałka, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2079947.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
composite materials, biocomposites, nanocomposites, synergism
Opis:
The development of technology is associated with a strong need for changes in the design and manufacture of new types of materials. Monolithic materials such as ceramics or metals have become insufficient for the needs of the modern market. The combination of several types of materials in one system turned out to be the right solution. Composite materials as multi-phase materials show improved properties compared with individual structural elements and can give the opportunity to design systems with enhanced specific characteristics.The presented work provides a review of actual literature dedicated to composite materials. In this work, the basic terminology, the division of composite systems, the most commonly used methods for composites preparation as well as physicochemical characteristics and potential applications of these types of matter were presented.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2019, 74, 1; 41-54
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porous hybrid materials as potential drug delivery systems
Autorzy:
Pajchel, Ł.
Szulkowska, A.
Kolmas, J.
Powiązania:
https://bibliotekanauki.pl/articles/283765.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hybrid materials
drugs
composites
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 43
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polityka Surowcowa Państwa 2050 - realizacja założeń uchwały Rady Ministrów
State Raw Materials Policy 2050 - implementation of the Council of Ministers’resolution
Autorzy:
Dziadzio, Piotr S.
Powiązania:
https://bibliotekanauki.pl/articles/20044475.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polityka Surowcowa Państwa 2050
bezpieczeństwo surowcowe
dostęp do surowców
State Raw Materials Policy 2050
raw materials security
access to raw materials
Opis:
Free, unrestricted access to raw materials is fundamental to the proper functioning of any economy. It should be in the interest of every country to ensure access to raw materials that are needed in the present but will also be needed in the future, particularly taking into account economic, social and also political changes that are taking place or are possible, with different dynamics. In order to meet such needs, it is necessary to have a strategy indicating concrete actions whose implementation will achieve the goal of ensuring raw material security, even in the decades to come. State Raw Materials Policy 2050 (PSP2050), adopted on March 1, 2022, is a very important document, not only from the point of view of the country’s raw materials security, but also for ensuring the country’s energy security. The document describes the actions to be taken for raw material security and considers the concrete implementation work already done. Simultaneously with the work on PSP2050, other activities were being prepared and executed, including legislation to enable its effective implementation.
Źródło:
Przegląd Geologiczny; 2022, 70, 8; 563-565
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern building materials
Autorzy:
Sadowska, Beata
Jimenez, José Ramón
Fernández Rodriguez, José María
Moreno Pérez, Fátima
Roldán Cañas, José
Rivas-Sánchez, Yair A.
Powiązania:
https://bibliotekanauki.pl/chapters/31029469.pdf
Data publikacji:
2019
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
Building materials
environment
traditional material
industrialized materials
Opis:
Decisions taken both in the design process of buildings and their modernization should comply with basic requirements, such as: strength and stability, resistance to dampness and water, resistance to fire, heat insulation, sound insulation, durability, comforts and conveniences. Building materials should not have harmful effects on human health. In their production, factors that destroy the natural environment (e.g. freons that destroy the ozone layer in the atmosphere) should not be used. The aspects of utilization, safe storage and recycling possibilities are also important. Another criterion for choosing material solutions is their availability as well as local traditions. However, the deciding factor is usually the economic aspect (costs of materials, construction and assembly).
Źródło:
Buildings 2020+. Constructions, materials and installations; 53-105
9788365596703
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recykling mineralnych materiałów odpadowych
Recycling of Waste Mineral Materials
Autorzy:
Wodziński, P.
Powiązania:
https://bibliotekanauki.pl/articles/1819067.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
recykling
materiały odpadowe
waste mineral materials
recycling
Opis:
This paper deals with the issues of recycling of granular materials in terms of the implementation of two basic technological processes that are used there: grinding and screening of those materials. Primarily mobile sets, used for this form of recycling are discussed. Granular materials discussed in this paper are mineral substances that are found as e.g. tailings, resulting from extraction of minerals. Furthermore, the paper deals with the (performance) characteristics of the mobile units and achievable capacity. Machines and whole sets of equipment discussed in this paper are used to recycle all the waste minerals. The paper contains only description of the basic trends in mechanical engineering destined for recycling mineral granular materials. Work is not an advertisement of such machines manufacturers, currently on the European market.
Źródło:
Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1378-1392
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Swelling pressure of natural and modified smectite-bearing clay raw materials
Autorzy:
Panna, W.
Wyszomirski, P.
Szumera, M.
Powiązania:
https://bibliotekanauki.pl/articles/110772.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
clay raw materials
swelling pressure
sodium activated smectites
waterproofing materials
Krakowiec clays
Triassic clay
Opis:
Smectite clays, due to their barrier properties and swelling ability, are often applied for waterproofing purposes. A proper value of swelling pressure is one of the parameters, which must be met by the fillers used in hybrid waterproofing materials. The authors determined the swelling pressure of selected clay raw materials in their natural state and after chemical modification. This parameter was measured by the Komine method, as this procedure is more accurate than the standard edometric method. The authors introduced some changes in the method. The samples represent Krakowiec clays (Miocene) and a Triassic clay, collected in active pits of building clays, which are widely exploited in south Poland. The content of the smectite group minerals, determined from the sorption of methylene blue and copper(II) triethylenetetramine, ranges between 15 and 35%. Further characteristics of the clays were obtained with X-ray diffraction, chemical analyses (calcium carbonate content including) and pH measurements. It has been found that the activation of smectite clays with sodium lowers their swelling pressure as water penetrates easier the interlayer spaces of the smectites modified. This is important from the viewpoint of assessing the quality of bentonite fillers.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 1; 127-135
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The problem of engineering materials selection in relation to the expected properties
Autorzy:
Cepil, M.
Powiązania:
https://bibliotekanauki.pl/articles/299171.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
construction materials
gas pipelines
steel
Opis:
Nowadays, in the selection of construction materials the most important thing is the unit price, though more expensive materials are very often replaced by cheap plastic as long as their use provides the durability and safety of the constructions. Even after using a lot of treatments to improve their mechanical, physical, in-use and technological properties, engineering materials sometimes do not meet the expected requirements. Therefore, today's products consist of many components made of different materials conforming to specific functions. The subject of the presentation is to analyze the characteristics of engineering materials and the possibility of their modifications depending on the expected parameters. The presentation also focuses on the selection of materials regarding their strength calculations, working conditions (including the impact of the environment on the part of the design), application of the optimal methods of manufacturing etc.
Źródło:
AGH Drilling, Oil, Gas; 2012, 29, 4; 447-451
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surowce mineralne
Mineral Resources
Autorzy:
Zieliński, S.
Powiązania:
https://bibliotekanauki.pl/articles/142345.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
surowce mineralne
Raw Materials Initiative
surowce nieenergetyczne
Mineral Resources
non-energy raw materials
Opis:
Gwałtowny rozwój społeczno-gospodarczy w XX w. został osiągnięty nie tylko dzięki postępom w nauce i technologii, lecz także niespotykanemu wcześniej zużyciu surowców. Problem dostaw surowców znalazł się więc w centrum uwagi ekip rządowych i środowisk przemysłowych. O ile jednak dyskusja o przyszłości surowcowej świata dotychczas koncentrowała się na surowcach energetycznych i organicznych (biomasie), to surowcom nieenergetycznym, takim jak minerały i metale, nie poświęcano równej uwagi. Sytuacja uległa zmianie dopiero w ostatnich kilkunastu latach, gdy uświadomiono sobie, że bez surowców mineralnych społeczeństwa uprzemysłowione i współczesne technologie byłyby niewyobrażalne. W tej sytuacji rodzi się obawa, czy rosnące zapotrzebowanie nie grozi wyczerpaniem zasobów i niedoborem surowców w najbliższej przyszłości. Niedobór surowców mineralnych jest szczególnie niepokojącym problem dla Unii Europejskiej, która jako całość jest wysoce zależna od importu minerałów metalicznych i metali potrzebnych w produkcjach high-tech. Komisja Europejska uruchomiła w 2008 r. program „Raw Materials Initiative”, który ustala zintegrowaną strategię w odpowiedzi na różne wyzwania wiążące się z dostępem do nienergetycznych surowców. W ramach strategii wytypowano surowce o wysokiej krytyczności zarówno z uwagi na ich znaczenie gospodarcze jak i ryzyko dostaw.
The rapid socio-economic development in the twentieth century has been achieved not only through progress in science and technology, but also the never before seen consumption of raw materials. The problem of raw materials supply found itself in the spotlight of government teams and industrial environments. However, while the debate about the future of the world’s raw materials focused so far on energy raw materials and organic ones (biomass), non-energy raw materials, such as minerals and metals, did not receive equal attention. The situation changed only in the last dozen years, when it was realized, that without mineral resources, industrialized society and modern technologies would be unimaginable. Such a situation raises a concern that the growing demand does not threaten with resource depletion and deficiency of raw materials in the near future. Mineral resources deficiency is a particularly worrying problem for the European Union, which as a whole is highly dependent on imports of metallic minerals and metals necessary in high-tech productions. In 2008 The European Commission launched the „Raw Materials Initiative” program, which sets out an integrated strategy in response to various challenges in access to non-energy raw materials. As part of the strategy, raw materials of high criticality were selected, because of their economic importance as well as their supply risk.
Źródło:
Chemik; 2014, 68, 5; 429-446
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The hyperdeform materials in systems of vibrations machines
Autorzy:
Żach, P.
Powiązania:
https://bibliotekanauki.pl/articles/246701.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
incompressible materials
elastomers
oscillation
very large reversible deformations
vibration
Opis:
In construction of machines more and more often be practical used materials name hyper-elastic for example: foamy structures, materials of base natural and synthetic rubbers and another of large reversible deformations. To description of elastic proprieties, it is possible to use the worked out theories well in which the most important they are the multinomial models and them special coincidence: Mooney-Rivlin, Yeoh and Ogden. Precise description propriety in questions dissipation the energy, dumping of vibration is a fault currently. The aim of the article is the analysis oscillation in systems from elements of incompressible and the description of phenomena setting during of work of such like systems. In this paper, is presented built methodology of elasticity propriety materials with large deformation. An assumption is a dissipation function we have present in analogous figure to elasticity function, well known with theory of hyperelastic materials. A description of model of internal damping was proposed with the proof the influence of component part of polynomial: figure and volumetric. The numeric permissive on comparison of received conception of description of hyperelastic material worked out in support about theoretical foundations with results of experimental investigations analyses' be become executed.
Źródło:
Journal of KONES; 2012, 19, 2; 587-590
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The study of sound and vibration isolating materials applicable environmental protection
Autorzy:
Sikora, J.
Targosz, J.
Powiązania:
https://bibliotekanauki.pl/articles/241841.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
materials
acoustic insulation
vibroisolation
Opis:
Prevention of composite material, characterized by a high acoustic insulation but satisfying spread of the dynamic interactions in the environment, the sound or vibration in materials requires new solutions task of isolation between the source of noise and vibration and the environment. These new solutions based on the idea of partition (of two or multilayer), the cores of granular materials, characterized by both good characteristics vibroisolation, sound absorption and vibration-damping materials. Using these solutions brings positive results in the reduction of acoustic energy, vibration isolation and acoustic damping material provided that they are the correct selection. The paper presents results of experimental investigations of acoustic insulation properties, parameters, physic - mechanical properties of selected structural elements made of materials belonging to the latest generation of noise and vibration safe guards applicable in the work environment and external environment. The paper presents the methodology and results of new materials used in Cathedrals: Vibroacoustics and Mechanics and Robotics and Mechatronics AGH, which should be standard in the selection of the parameters of vibroacoustic properties of the newly proposed structural engineering. The work was carried out in a research project 4875/B/TO2/2010/38 financed by Ministry of Science and Higher Education and projectII.B.12 (2011-2013) "New material solutions in the design of layered Barriers vibroacoustic protection of machinery and equipment", which is one of the objectives of the multiannual program "Improving the safety and working conditions," coordinated by CIOP - PIB in Warsaw.
Źródło:
Journal of KONES; 2012, 19, 4; 555-564
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review of new developments in machining of aerospace materials
Autorzy:
Jemielniak, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1428707.pdf
Data publikacji:
2021
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
machining
aerospace materials
nickel alloy
titanium alloy
composite
Opis:
The paper presents an update of the recent literature on advances in machining of difficult to machine materials such as nickel and titanium-based alloys, and composites used in aeroengine and aerostructure applications. The review covers the following issues: advances in high-performance cooling techniques as cryogenic machining, minimum quantity lubrication, the combination of MQL and cryogenic cooling, and high-pressure lubricoolant supply and hybrid cutting processes – vibration assisted machining (both low and high frequency), laser, plasma and EDM assisted machining. Examples of applications in industrial processes are also given.
Źródło:
Journal of Machine Engineering; 2021, 21, 1; 22-55
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Materials education: now and in the future
Autorzy:
Goodhew, P.
Bullough, T.
Taktak, D.
Powiązania:
https://bibliotekanauki.pl/articles/200043.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
materials education
teaching
subject profile
UKCME
Opis:
The state of education in materials science in the UK is reported, based on a National Subject Profile developed by the UK Centre for Materials Education. The curriculum content and methods of teaching are reviewed, and compared with the results of the largest ever education survey of materials scientists at Euromat 2009. A wide range of national opinions are presented, but the overall state of materials education in Europe is concluded to be very healthy.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 2; 295-302
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Feasibility of alkali-activated mining waste foamed materials incorporating expanded granulated cork
Autorzy:
Beghoura, I.
Castro-Gomes, J.
Ihsan, H.
Estrada, N.
Powiązania:
https://bibliotekanauki.pl/articles/88897.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
mining waste mud
alkali activated materials
expanded cork
foamed materials
porosity
Opis:
Different combinations of mining waste mud, grounded waste glass, Portland cement, metakaolin and expanded cork were mixed together with alkaline activators (sodium silicate and sodium hydroxide solution) and as well aluminum powder or hydrogen peroxide to produce foamed lightweight materials. The size of the mineral materials is under 500 µm and expanded cork particles size is between 2 to 4 mm. The expanded cork added to the mixes changed between 10 to 40% volume of total solids. The influence of expanded cork on compressive strength was investigated. Precursors and activators were mixed together to produce a homogeneous mixture, which was placed into a cubic mold (40 x 40 x 40 mm3), and cured at a temperature of 60°C, for 24 hours. After curing process, samples without foaming agents achieved the maximum compressive strength of 14.7 and 19.5 MPa for 7 and 28 days respectively. The porosity was observed by the naked eye of large voids in a range of 4 mm in size. Microstructure analyses were carried on by SEM. Samples made with aluminum powder showed higher volume increase about 358% compared with samples made with hydrogen peroxide that presented a 141% volume increase. This preliminary study shows the feasibility to produce new improved lightweight foamed alkali activated materials incorporating expanded cork with potential applications in artistic, architectural, and historical heritage restoration.
Źródło:
Mining Science; 2017, 24; 7-28
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odporność materiałów ochronnych na substancje chemiczne - metodyka badania
Resistance of protective materials to chemical substances - research methodology
Autorzy:
Krzemińska, S.
Powiązania:
https://bibliotekanauki.pl/articles/181383.pdf
Data publikacji:
2011
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
materiały ochronne
odzież ochronna
odporność materiałów ochronnych
protective materials
barrier materials
protective clothing
Opis:
W artykule przedstawiono wymagania stawiane materiałom barierowym stosowanym do wytwarzania odzieży, obuwia i rękawic ochronnych na przenikanie substancji chemicznych. Zwrócono uwagę na zachowanie właściwości ochronnych materiałów w warunkach kontaktu wielokrotnego, symulującego w większym stopniu warunki narażenia na chemikalia.
This paper presents the requirements for barrier materials used in the production of clothing, gloves and boots protecting against permeation by chemical substances. It also discusses the problem of protective materials maintaining their properties under multiple contact conditions, which simulate exposure to chemicals more accurately.
Źródło:
Bezpieczeństwo Pracy : nauka i praktyka; 2011, 7/8; 32-34
0137-7043
Pojawia się w:
Bezpieczeństwo Pracy : nauka i praktyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania mineralogiczne w problematyce kopalin towarzyszących i mineralnych surowców odpadowych
The mineralogical research in associate raw materials and waste mineral materials
Autorzy:
Ratajczak, T.
Hycnar, E.
Jończyk, W.
Powiązania:
https://bibliotekanauki.pl/articles/183361.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
kopaliny towarzyszące
mineralne surowce odpadowe
badania mineralogiczne
złoża antropogeniczne
associated raw materials
waste mineral materials
anthropogenic deposit
mineralogical investigations
Opis:
The rational management of raw materials resources requires utilization all useful mineral types occurring in a deposit, i.e. associated mineral raw materials and waste mineral materials which come from exploration process. The associated mineral raw materials and mineral waste materials are often accumulated in anthropogenic deposits. The quality of raw material is a superior criterion which stimulates the possibility of its utilizations.
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 2/1; 197-203
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety and Security Aspects for the Effective Shipment of Radioactive Materials with Maritime Transportation
Autorzy:
Er, Z.
Powiązania:
https://bibliotekanauki.pl/articles/116724.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Marine Transportation
Radioactive Materials
Shipment of Radioactive Materials
Safety and Security Aspects
Safety and Security in Sea Transportation
IAEA Regulations
International Maritime Dangerous Goods Code (IMDG Code) Carriage of Nuclear Materials
Opis:
The International Atomic Energy Agency (IAEA) estimates that 10 million shipments of radio-active materials are transported annually. Each shipment is made up of either a single package or a number of packages transported from one location to another. The vast majority of these shipments, some 95%, relate to non-fuel cycle transports such as the transport of smoke detectors, and cobalt sources for medical purposes. Only 5% relate to nuclear fuel cycle transports. This study investigates the safety stability aspect, harmonized regulation based transportation, sustaining shipment aspect for the transportation of radioactive materials by ships. Consequently the originality of this paper appears the alignment of existing maritime rules and regulations with the IAEA regulations in order to provide easy understanding and usage for the establishment of code of safe and secure practices for seafarers with the countermeasures and harmonized regulations that are practically implemented by the navigation officers and Master.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 3; 303-309
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activating role of interactive didactic materials in teaching computer subjects
Autorzy:
Lis, R.
Powiązania:
https://bibliotekanauki.pl/articles/103021.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
interactivity
learning materials
computer subjects
multimedia course
Opis:
In the days of the visual culture a manner of the transmission of information plays a very important role. Adopting a technique of the join of text, graphics, sound and animation in frames of the uniform structure of presenting data, particularly in the education, it is possible to achieve good results in handing over of knowledge than at using only one of the media. The article presents the results of research devoted to the influence of visual and textual teaching materials, on the level of assimilation of knowledge subjects and their involvement in the assimilation of content. The analysis of the results showed that the visualization of teaching content is a factor significantly activating the educational process and affecting the level of knowledge assimilation.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 28; 139-143
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspects of the applications of composite materials in combustion engines
Autorzy:
Posmyk, A.
Filipczyk, J
Powiązania:
https://bibliotekanauki.pl/articles/247373.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
composite materials
wear
Opis:
The paper presents the results of investigations concerning the possibilities of application of composite materials in the construction of internal combustion engines. The total mass of the engine can be reduced by allying composite materials, which have a much higher strength than hitherto applied conventional materials. Less thermal expansion allows reducing assembly clearance between the piston and cylinder. The surface topography after the process of machining of composite materials contains hollows, which act as trays for lubricant, wear products and pollution particulates. Therefore, it is possible to reduce friction, fuel consumption, level of exhaust emission and improve the durability of engine. During the investigations, the engine piston made of aluminium matrix composite has been tested. The tests were related to the influence of surface topography of the piston skirt containing Al2O3 particles on the adsorption of lubricating oil, which facilitates lubrication in small displacement test engine. Aluminium matrix composite materials have some disadvantages, too. The most important are higher finishing costs and higher wear of the other sliding element. To reduce the finishing costs of making the suitable surface, special methods for example water jet cutting, have been worked out. To reduce the wear of the other sliding element, reinforcing spherical particles without sharp edges should be applied. Covering the tribological partner-sliding surface with a composite surface layer (e.g. Cr+Al2O3) can result in a relevant reduction of its wear.
Źródło:
Journal of KONES; 2013, 20, 4; 357-361
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dobór materiałów wyposażenia wnętrz a bezpieczeństwo pożarowe obiektów
The Selections of Materials for Indoor Application and Fire Safety of Buildings
Autorzy:
Dobrzyńska, R.
Powiązania:
https://bibliotekanauki.pl/articles/137096.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Służby Pożarniczej
Tematy:
bezpieczeństwo pożarowe
właściwości palne materiałów
badania ogniowe materiałów
kryteria doboru materiałów
fire safety
properties of flammable materials
materials fire testing
criteria for selection of materials
Opis:
Bezpieczeństwo pożarowe obiektów zależy w dużej mierze od właściwości materiałów stanowiących elementy wyposażenia pomieszczeń. Do właściwości tych zalicza się między innymi: zapalność, dymotwórczość, toksyczność produktów rozkładu termicznego i spalania tych materiałów, intensywność wydzielania ciepła, rozprzestrzenianie płomienia po powierzchni. Od tych cech materiałów zależy zarówno przebieg pożaru, jak i bezpieczeństwo osób znajdujących się w obiekcie nim objętym. Na rynku dostępne są materiały, które mogą spowolnić przebieg pożaru albo spowodować jego rozwój, stwarzając bezpośrednie zagrożenie dla zdrowia i życia ludzi. W Polsce kryteria doboru materiałów określone są odpowiednimi przepisami, np. dla materiałów stosowanych w budownictwie jest to Rozporządzenie Ministra Infrastruktury w sprawie warunków technicznych, jakim powinny odpowiadać budynki i ich usytuowanie, dla materiałów stosowanych w kolejnictwie – norma PN -EN 45545 ‒2, natomiast w okrętownictwie – Kodeks procedur prób ogniowych (FTP Code). Kryteria te stanowią jednak wymagania minimalne, nie zawsze gwarantujące bezpieczeństwo pożarowe obiektu. Ponadto wymagania stawiane materiałom wyposażenia wnętrz nie dotyczą tych, które stosowane są w budynkach mieszkalnych zaliczanych do stref pożarowych ZL IV. Tymczasem statystyki pożarowe wskazują, że do pożarów dochodzi najczęściej w budynkach mieszkalnych i środkach transportu. Wyniki badań laboratoryjnych właściwości palnych różnego rodzaju materiałów wskazują, że możliwy jest taki dobór materiałów wyposażenia wnętrz, które w przypadku pożaru obiektu, nie będą stanowiły śmiertelnego zagrożenia dla ludzi się w nim znajdujących.
The fire safety of buildings depends mostly on the properties of the materials that comprise the room equipment . These properties include, among others: flammability, smoke generation, toxicity of product of thermal decomposition and combustion of these materials, the heat release rate, the flame spreading on the surface. These material properties are responsible for both, the course of fire, as well as the safety of people in the building . There are commercially available materials which can slow the spread of fire, or can result in the development of posing a direct threat to human life and health. In Poland, the criteria for the selection of materials are specified by the relevant regulations, eg. for the materials used in any construction there is the Regulation of the Minister of Infrastructure, for the technical conditions to be met by buildings and their location, materials used in the railway – there is the EN 45545 ‒2 standard, and for the shipbuilding – there is the International Code for Application of Fire Test Procedures (FTP Code). These criteria are the minimum requirements which however, do not always ensure the safety in case of fire. In addition, the requirements for interior materials do not apply to those that are used in residential buildings in fire zones ZL 4. Meanwhile, the fire statistics indicate that fires occur generally in domestic buildings and transport. The results of laboratory tests of flammable properties of various materials indicate that there is a possibility to select materials, which in case of fire, will not pose a mortal threat to people in the building.
Źródło:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2017, 1, 61; 91-106
0239-5223
Pojawia się w:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The possibility of using waste materials in building materials
Autorzy:
Nalewajko, Marta
Powiązania:
https://bibliotekanauki.pl/articles/969489.pdf
Data publikacji:
2019
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
urban ecosystem
waste raw materials
ash aggregate
concrete chipboard
lightweight
ekosystem miejski
odpady z surowców
kruszywo popiołu
betonowa płyta wiórowa
lekki beton
Opis:
In recent years, great emphasis has been placed on the implementation of the principles of sustainable construction and environmental protection. Decreasing amount of natural resources and increasing amount of industrial waste have made it necessary to produce products with the use of recycled materials. A number of studies conducted allow us to state that artificial aggregates, industrial ashes and waste from the wood industry are widely used in the production of construction products. The aim of the article is to show that the use of waste materials will allow to reduce the weight and absorbability of concrete chips by using artificial aggregate type Certification and improve the thermal insulation of products through the use of sawdust and wood chips. A 2 factorial experience with a rotational experimental plan was planned. The article presents the results of physical and mechanical properties tests and statistical interpretation of the obtained results.
Źródło:
Ekonomia i Środowisko; 2019, 4; 123-135
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of Polymer Materials with New Smart Utilities
Autorzy:
Głogowska, Karolina
Klepka, Tomasz
Dulebova, Ludmila
Powiązania:
https://bibliotekanauki.pl/articles/102277.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
polymer materials
stimuli-responsive smart polymer materials
mechanical properties
materiały polimerowe
inteligentne materiały polimerowe reagujące na bodźce
właściwości mechaniczne
Opis:
Modern technologies increasingly often rely on the use of intelligent (also known as “smart”) materials exhibiting unique utilities and properties. The state of knowledge on intelligent polymers ranges from diagnostic research to a more extensive body of knowledge, combined with the knowledge of the practical methods for manufacturing these materials. On the basis of a review of the subject literature, this paper describes the existing smart polymer materials. It also presents the examples of applications for these new materials. In the further part of the paper, an example of how the concept of smart materials can be used in new polymeric products to influence the selected mechanical properties when the surrounding temperature changes. The new material or the acquisition of different properties was created by undercutting or selecting the correct thickness and type of polymer layer from which the new product is made. The example of own research, apart from their analysis, ends with the conclusions of an applicative nature.
Źródło:
Advances in Science and Technology. Research Journal; 2020, 14, 4; 96-103
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of multi-layer materials cutting
Modelowanie skrawania materiałów wielowarstwowych
Autorzy:
Zębala, W.
Powiązania:
https://bibliotekanauki.pl/articles/175815.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modelowanie
skrawanie
materiały wielowarstwowe
modelling
cutting
multilayer materials
Opis:
The paper presents some aspects of modelling of multi-layer materials cutting process. Numerical calculation with the finite element method (Lagrangian equations) were performed for the decohesion process simulation of the example workpieces (machined with one tool wedge) consisted of two and three layers with different mechanical properties. Results of calculation in the form of colour maps of temperature and plastic strain fields distributions in the cutting zone are presented. An example course in time of the main cutting force components, during wedge tool passage through the different layers of the cutting material, is presented.
W pracy omówiono wybrane zagadnienia modelowania procesu skrawania materiałów wielowarstwowych. Obliczenia numeryczne metodą elementów skończonych (równania Lagrange'a) prowadzono w celu symulacji procesu dekohezji modelowych materiałów obrabianych. Materiały składają się z dwóch lub trzech warstw o różnych właściwościach mechanicznych. Obróbkę skrawaniem prowadzono za pomocą jednego ostrza narzędzia. Określono rozkłady wartości temperatury i odkształcenia plastycznego w strefie skrawania. Przedstawiono przykłady zmiany wartości składowych całkowitej siły skrawania podczas przejścia ostrza narzędzia między różnymi warstwami skrawanego materiału.
Źródło:
Advances in Manufacturing Science and Technology; 2012, 36, 1; 9-18
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comprehensive constitutive equation for granular materials
Autorzy:
Gudehus, G.
Powiązania:
https://bibliotekanauki.pl/articles/1954568.pdf
Data publikacji:
2000
Wydawca:
Politechnika Gdańska
Tematy:
constitutive equation of soil
critical state
deformation
granular materials
stability analysis
Opis:
constitutive equation is proposed for describing changes of states of granular materials, which are sufficiently characterised by the void ratio and the stress tensor. It may be considered as an extension of the Critical State concept. It is based on recently published hypoplastic equations and covers a wide range of densities, pressures and deformations. A factorial decomposition allows a rather easy separation and determination of material parameters. Two factors depend on a relative void ratio so that it remains within lower and upper bounds. The bounding void ratios decrease monotonously from maximal values to zero with increasing pressure. The same reduction of the void ratio is proposed for an isotropic compression starting from a suspension. Thus a granulate hardness is defined, and a stiffness factor can be determined. Four material parameters can be estimated from classification tests and determined from the asymptotic behaviour in element tests. Four further parameters are determined by calibration; they are rather constant for wide groups of materials. Strength and stiffness values can be derived and used for the analysis of deformations, stability, and flow. The viscous behaviour is modelled by a rate dependent factor with one further parameter. Limitations and possible extensions of this comprehensive approach are also outlined.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2000, 4, 3; 319-342
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Materiały wykazujące zjawiska pamięci kształtu
Shape memory materials
Autorzy:
Stróż, D.
Powiązania:
https://bibliotekanauki.pl/articles/285026.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomateriały
pamięć kształtu
materiały inteligentne
biomaterials
shape memory
intelligent materials
Źródło:
Engineering of Biomaterials; 2011, 14, no. 109-111 spec. iss.; 32-35
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kopaliny balneologiczne jako surowiec kluczowy
Balneological minerals as a pivotal raw materials
Autorzy:
Zglinicki, Karol
Szamałek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2076222.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
surowce balneologiczne
surowce kluczowe
prawo górnicze
ekonomia regionalna
balneological raw materials
pivotal raw materials
mining law
regional economics
Opis:
Changesin the demographic structure of the society and the development of civilisation diseases result in an increased interest in health-resort and spa and wellness services in Poland. Balneological raw materials will fill an important role in maintaining and improving the quality of life. The increase in demand for health-resort and disturbing reports on the possible collapse of the current pension system will probably force necessity of extending the retirement age. Undoubtedly, balneological raw materials will be crucial for efficient functioning of the society by providing broader health care prolonging physical fitness of the population. The awareness of occurring and coming changes makes the authors discuss the significance of the role of mineral resources in terms of not only innovation, defence and safety but also socio-cultural and civilisation.
Źródło:
Przegląd Geologiczny; 2021, 69, 4; 218--223
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wodorowanie próbek materiałów konstrukcyjnych
Hydrogenation of samples of technological materials
Autorzy:
Łukaszewicz, J.
Łapiński, Z.
Powiązania:
https://bibliotekanauki.pl/articles/234812.pdf
Data publikacji:
2007
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
wodorowanie
materiały konstrukcyjne
hydrogenation
constructional materials
Opis:
W artykule przedstawiono wpływ wodorowania na mikrostrukturę materiałów konstrukcyjnych oraz wykorzystanie tego procesu podczas określania przydatności eksploatacyjnej tych materiałów.
The influence of the hydrogenation process into the microstructure of technological materials and their further usefulness in the final article functionality is presented in the paper.
Źródło:
Problemy Techniki Uzbrojenia; 2007, R. 36, z. 101; 127-141
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie i wymiary bezpieczeństwa państwa w zakresie surowców nieenergetycznych
Significance and dimensions of state security in respect of non-energy raw materials
Autorzy:
Zamęcki, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/347752.pdf
Data publikacji:
2011
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
bezpieczeństwo surowcowe
surowce nieenergetyczne
raw materials security
non-energy raw materials
Opis:
Bezpieczeństwo surowcowe państw w zakresie surowców nieenergetycznych, mimo że często niedostrzegane, bądź postrzegane tylko przez pryzmat rynkowy, pełni znaczną rolę od momentu rozwoju gospodarek industrialnych po dzień dzisiejszy. W ciągu wieków zmienia się jedynie lista surowców nieenergetycznych mających wpływ na ogólne bezpieczeństwo kraju. Zależna jest ona bowiem od potrzeb przemysłu konkretnego systemu gospodarczego. Zgodnie z podejściem rynkowym bezpieczeństwo surowcowe traktować należy jako część ogólnego bezpieczeństwa ekonomicznego państwa, rozumianego w kategoriach pewności dostaw surowców dla zakładów przemysłowych na poziomie gwarantującym wykorzystywanie większości mocy produkcyjnych. Takie ujęcie dominuje wśród ekonomistów. Natomiast z punktu widzenia politycznego surowce stanowią istotny element ogólnego bezpieczeństwa państwa. Warunkują siłę militarną państwa oraz coraz częściej stanowią narzędzie prowadzenia konfliktów międzypaństwowych. Zagrożenia/wyzwania dla bezpieczeństwa surowcowego mogą wynikać z co najmniej pięciu sfer: geologicznej, technicznej, ekonomicznej, politycznej i środowiskowej. Na podstawie tych zagrożeń można wyznaczyć test bezpieczeństwa surowcowego państwa, składający się z kilkunastu pytań. Jednocześnie współczesne państwa podejmują działania na rzecz zapewnienia sobie bezpieczeństwa surowcowego. Wykorzystują do tego m.in. instrumenty o charakterze prawnym, politycznym, ekonomicznym, technicznym czy kulturowym.
Non-energy raw materials security is an important aspect of state security. It has an influence on the social and economic development of the state. The main aim of the paper is to emphasize the theoretical paradigms, aspects, conditions and role of non-energy raw materials security. The paper refers to historical and contemporary examples (Poland, China and EU). The paper also underlines the main methods of ensuring raw materials state security.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2011, 3; 61-69
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interpretacja materiałów wizualnych w badaniach naukowych
Interpretation of visual materials in scientific research
Autorzy:
Penkowska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/425698.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
visual materials
visual culture
visual method
Opis:
The paper is intended to constitute a voice in a discussion about visual culture in general, and about selected methods of analysis and interpretation of visual materials in particular. In the first part of the article the author discusses the issues of changes in contemporary culture with emphasis on its visual aspects. In the second part, the author takes a closer look at two research methods, which can be used for discovering new areas of education, namely Kress and Leuven visual-verbal analysis method and Schratz and Steiner-Loffler photoevaluation method. The brief outline of a theoretical framework for research methodology on interpretation of visual materials by Gillian Rose closes the paper. Visual methods referred to in this article have strong theoretical roots in ethnography, especially visual ethnography, which is a reflective and subjective way to tell social stories by the use of pictures, accompanied or not by the text.
Źródło:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2017, 1 (68); 11-16
1731-6758
1731-7428
Pojawia się w:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and characterization of bio-hybrid hydrogel materials
Autorzy:
Malina, Dagmara
Bialik-Wąs, Katarzyna
Pluta, Klaudia
Powiązania:
https://bibliotekanauki.pl/articles/1844885.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
materials
parameters
hydrożele
materiały
właściwości
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 30
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Materials used in the combat aviation construction
Autorzy:
Konieczny, Jarosław
Labisz, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2098153.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
military aviation
materials
properties
structure
lotnictwo wojskowe
materiały
właściwości
struktura
Opis:
In this work, an attempt was made to apply laser surface technology for enhancement of the properties and strengthening the material with addition of ceramic phases in the form of silicon and tungsten carbide particles, leading to a remarkable increase in hardness. Thanks to rapid cooling caused by heat being transferred to the cold substrate, an advantageous, fine-grained structure develops, showing higher gradient morphology; furthermore, the surface layers obtained with laser alloying offer greater heat-resistance and anti-corrosion properties, as well as high wear resistance in addition to the aforementioned hardness, which increases by as much as 15% for the AlSi9Cu4 alloy compared with the alloy after standard heat treatment. Such an increase in the values of the mechanical properties makes it possible to use the investigated alloy in applications including, e.g., recyclable thermally exposed surfaces, such as pistons in internal combustion engines, which enables further decrease in the weight and the thermal expansion with simultaneous increase in the strength, reduction in fuel consumption, and increase in carrying load, speed, and range, which generates the need for further research into the area.
Źródło:
Transport Problems; 2021, 16, 2; 5--18
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Fields for Electropolishing Improvement: Materials and Systems
Autorzy:
Hryniewicz, Tadeusz
Rokosz, Krzysztof
Rokicki, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/411721.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Magnetic field
Magnetoelectropolishing MEP
Materials
Electrochemical systems
Opis:
The paper aims to present the main objectives for using magnetic fields to improve process of electropolishing (EP), firstly by focusing on materials and electrochemical systems. The general introduction has been concerned on the sample surface treated under pseudopassivity conditions, in the process generally known as magnetoelectropolishing (MEP). Long-term up-to-date experiments have shown profound changes observed on metals and alloys. The advantageous effects gained by applying MEP to metals and alloys cover: improvement of corrosion resistance, bio- and haemocompatibility, roughness by modification of their surfaces. The improvements are also referred to the mechanical properties of metals and alloys treated by MEP namely: removal of hydrogen, fatigue resistance enhancement, etc. Further developments and the effects of magnetic fields on electropolishing of metals and alloys are to be presented in the next publications.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 4; 98-108
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influential factors affecting materials management in construction projects
Autorzy:
Jusoh, Z. M.
Kasim, N.
Powiązania:
https://bibliotekanauki.pl/articles/406714.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
construction projects
project performance
materials management
influential factors
Opis:
Construction projects are more often than not plagued by poor performances such as delays, cost overrun, low productivity, construction wastes and compromised quality. Amongst the critical contributory factors of poor project performances, is the ineffectiveness of materials management occurring in the construction sites. Indeed, materials management is a very important component for construction projects. However, there are only limited numbers of research available regarding this topic. Thus, this research focuses its study on materials management, specifically in identifying the influential factors that affect materials management in the construction project activities. Literatures from books, journal articles and conference papers related to poor project performances and materials management have been reviewed. Consequently, this study sorted the salient influential factors and categorized them based on their specific group. Out of 47 factors identified, they are classified into 8 groups. They are (1) site condition; (2) planning and handling on site; (3) management; (4) materials; (5) supplier and manufacturer default; (6) transportation; (7) contractual; and (8) governmental interferences. In conclusion, this study contends that by identifying the influential factors affecting materials management, it will help construction players to avoid the occurrence of those factors and will minimize the negative impacts on the overall performance of construction projects. Hence, the handling-over of project will be according to schedule and not delayed by materials mismanagement.
Źródło:
Management and Production Engineering Review; 2017, 8, 4; 82-90
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Barriers to Sourcing Reusable Materials
Autorzy:
Pruska, Ż.
Malak, M.
Adamczak, M.
Domański, R.
Cyplik, P.
Powiązania:
https://bibliotekanauki.pl/articles/409184.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
supply
waste
reusable materials
waste management
Opis:
Nowadays companies must approach the protection of the natural environment as an integral part of their management process. The using of waste as raw materials in manufacturing processes is in line with the idea of maintaining justice across generations. However, business practice has shown that in order for such activities to take place, companies need first to grapple with numerous barriers arising in the course of their adaptation to participate in reverse channels. The purpose of this paper is to present sample barriers encountered during the sourcing of reusable materials, which are the products of the company’s organisational structures and the nature of the entire secondary materials market. Planning the supply of reusable materials supply is more complex compared with planning the supply of primary materials. This is because the flow of re-sources occurs through many reverse channels with unstable supply and material quality (industrial and household waste). The supply, which means the availability of raw materials, depends on many issues. However, the limited availability of natural resources makes creating sustainable supply chains, operating like ecosystems, a pressing requirement.
Źródło:
Research in Logistics & Production; 2015, 5, 2; 181-190
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical properties study of fibre reinforced polymeric materials used in aircraft structures
Autorzy:
Porras, S.
Mucha, M.
Powiązania:
https://bibliotekanauki.pl/articles/241579.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
composite materials
electrical conductivity
carbon fibre reinforced polymer
CFRP
glass fibre reinforced polymer
GFRP
aerospace materials
lightning strike protection
LSP
Opis:
Aircraft are exposed to lightning strikes. Lightning strike protection (LSP) devices involve additional weight of the aircraft. Therefore, multifunctional materials that allows the conductivity of electrical current and, simultaneously, holds the mechanical properties required to withstand the typical conditions for an aerospace material are widely researched. A typical resin used in aviation is an insulator, so main research is done to reduce its resistance. On the other hand, the type of reinforcement can have a large influence on the electrical conductivity in the plane of reinforcement. The aim of the article is to evaluate the effect of the type and the basis weight of reinforcement on the electrical conductivity. For this purpose, with the use of a hydraulic press, different four-layer composites based on epoxy resin were produced. Each differing is in combination of carbon, glass layers and their basis weight (from 48 kg/m2 to 245 kg/m2 ). The measuring proceedings were carried by an RMS multi meter and, more accurate, by an LCR meter with 4 selectable test frequencies. The measurements were made both along the strand fibres and at a 45-degree angle. The results made it possible to determine which reinforcement of aircraft composites should be selected at the aircraft design level to provide increased electrical conductivity along the reinforcement fibres and thus influence one of the factors affecting the protection of the aircraft against the effects of lightning
Źródło:
Journal of KONES; 2018, 25, 4; 347-353
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of sound absorbing properties of composite made of recycling materials
Autorzy:
Gaj, Patryk
Kopania, Joanna
Wójciak, Kamil
Bogusławski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/128049.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
sound absorbing materials
recycling
sound absorption coefficient
composite materials
materiały dźwiękochłonne
recykling
współczynnik pochłaniania dźwięku
materiały kompozytowe
Opis:
In modern world we are searching methods to reuse most of industrial disposals produced during manufacturing. Some kinds of materials, like scraps from acoustic foam, however are not so easily utilized using recycling methods for its primary usage. Disposals produced during the manufacturing process can be compressed and reused as sound absorbing material. The purpose of this article is to examine sound absorbing properties of material made of acoustic foam disposals and compare it with sound protection materials, which are commonly used. Sound absorbing damping were tested using Kundt’s tube and reverberation room examination method. Tests were carried out according to standard PN-EN ISO 354:2005, for reverberation room examination, and according to Bruel&Kjaer electronic instruments technical manual for Kundt’s tube examination.
Źródło:
Vibrations in Physical Systems; 2019, 30, 1; 1-7
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculation of Combustion, Explosion and Detonation Characteristics of Energetic Materials
Autorzy:
Grys, S.
Trzciński, W. A.
Powiązania:
https://bibliotekanauki.pl/articles/358699.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
thermochemical codes
energetic materials
combustion
explosion
detonation
Opis:
In this work, the thermodynamic code for the determination of the chemical equilibrium composition of a non-ideal heterogeneous system is presented. Computation of combustion, explosion and detonation parameters for some explosives is performed as well as isentropes of products expansion and detonation energy are estimated. Moreover, the non-equilibrium calculations are carried out, in which chemical inertness of one from the components of explosive composition as well as no heat exchange between the component and the detonation products are assumed. At the end, some calculated detonation characteristics are compared with the experimental ones.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 2; 97-113
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Memristors : a Short Review on Fundamentals, Structures, Materials and Applications
Autorzy:
Domaradzki, Jarosław
Wojcieszak, Damian
Kotwica, Tomasz
Mańkowska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/226873.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
memristor
materials
electronics
applications
Opis:
The paper contains a short literature review on the subject of special type of thin film structures with resistive-switching memory effect. In the literature, such structures are commonly labeled as "memristors". The word "memristor" originates from two words: "memory" and "resistor". For the first time, the memristor was theoretically described in 1971 by Leon Chua as the 4th fundamental passive electronics element with a non-linear current-voltage behavior. The reported area of potential usage of memristor is enormous. It is predicted that the memristor could find application, for example in the domain of nonvolatile random access memory, flash memory, neuromorphic systems and so forth. However, in spite of the fact that plenty of papers have been published in the subject literature to date, the memristor still behaves as a "mysterious" electronic element. It seems that, one of the important reasons that such structures are not yet in practical use, is unsufficient knowledge of physical phenomena determining occurrence of the switching effect. The present paper contains a literature review of available descriptions of theoretical basis of the memristor structures, used materials, structure configurations and discussion about future prospects and limitations.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 2; 373-381
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Living Values education in teaching Materials to Develop students’ Civic Disposition
Autorzy:
Komalasari, Kokom
Sapriya, .
Powiązania:
https://bibliotekanauki.pl/articles/2005002.pdf
Data publikacji:
2016-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
living values education
teaching materials
civic disposition
student
Opis:
The study describes a model of living values education in teaching materials and its impact on the civic disposition of students. It employs the design of research and development in Civic education department, Indonesia University of education. The model of living values education in teaching materials is an integration of the living values in the teaching materials presented in the framework of the material. It includes introduction, keyword, map of concepts, subject matter, discussion, living values, conclusions, reflection on the value application, and references. The application of the model of living values education in teaching materials significantly affects students’ civic disposition.
Źródło:
The New Educational Review; 2016, 44; 107-121
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature development of selected materials in a reduced model – experimental test
Autorzy:
Müllerová, Jana
Krajčír, Maroš
Powiązania:
https://bibliotekanauki.pl/articles/1933813.pdf
Data publikacji:
2020-12-17
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
combustion
temperature development
fire parameters
combustible materials
Opis:
The work is focused on an experimental test of temperature development in a scale model. Various types of combustible materials were used in the test in combination with the spruce wood. The work points to the influence of the fuel source on selected parameters of a fire in an enclosed space. The course of a fire is influenced by various factors. The course of a fire in an enclosed space differs from the course of a fire in an open space. As a part of the overall development of the fire, the temperature of the fire is affected. Therefore, one can state that the parameters affecting the development of an internal fire also have a direct effect on the temperature development. The main goal of this work is to compare different types of materials in terms of the properties they manifest during a fire. The practical part contains the analysis of the materials used in the experiment. Description of the scale model and of the measuring control panel are the content of another part of the work. In the end there is a comparison of the individual temperature curves.
Źródło:
Kultura Bezpieczeństwa. Nauka – Praktyka – Refleksje; 2020, 38(38); 79-88
2299-4033
Pojawia się w:
Kultura Bezpieczeństwa. Nauka – Praktyka – Refleksje
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multimodality of cultural content in ELT materials for young learners.
Autorzy:
Stec, Maria Dorota
Powiązania:
https://bibliotekanauki.pl/articles/783087.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
multimodality
ELT materials
cultural content
visual literacy
young learners.
Opis:
Cultural content is incorporated into EL materials to enrich linguistic content. The paper focuses on English materials as cultural artefacts analysed in terms of multimodality. The aim is to identify the most important multimodal aspects of cultural content offered in English course books for early language education. Following the multimodal discourse analysis, the image–language relations presented in the culture sections are examined. The paper seeks to address two following questions: What is the multimodality of cultural content in English course books for young learners? What are the image-language relations involved in the construction of cultural content? The project involves an analysis of nine course books currently used in teaching English to young learners in Polish primary schools. The data will be collected during the evaluation studies, which here are both quantitative and qualitative in nature. The study is based on a set of universal, content-specific, multimodal and intermodal criteria. It is hoped that the results from the research project will enrich the process of ELT materials design in terms of multimodality. They will support the need for developing multimodal (visual) literacy through multicultural education in early language education.   
Źródło:
Theory and Practice of Second Language Acquisition; 2017, 3, 1
2450-5455
2451-2125
Pojawia się w:
Theory and Practice of Second Language Acquisition
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial intelligence and virtual environment application for materials design methodology
Autorzy:
Dobrzański, L.A.
Honysz, R.
Powiązania:
https://bibliotekanauki.pl/articles/99990.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
materials design
mechanical properties
virtual environment
modelling
Opis:
The purpose of this study is to develop a methodology for material design. This methogology will enabling the selection of production descriptors to ensure the required mechanical properties of structural steels specified by the designer of machinery and equipment. The selection is performed by using a computational model developed with use of artificial intelligence methods and virtual environment. The model is designed to provide impact examinations of these factors on the mechanical properties of steel only in the computing environment. Virtual computing environment allows full usage of the developed intelligent model of non-alloy and alloy structural steel properties and provides an easy, intuitive and user-friendly way to designate these properties for products after heat and plastic treatment. Also, very easy is the determination of chemical composition, treatment conditions and geometric dimensions on the basis of the steels mechanical properties. The proposed solutions allow the usage of developed virtual environment as a new medium in both, the scientific work performed remotely, as well as in education during classes. It is also possible the extension of this model to other groups of materials, not just for steel.
Źródło:
Journal of Machine Engineering; 2011, 11, No. 1-2; 102-119
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of lightweight materials in modern transport vehicles
Autorzy:
Ćwiek, Janusz
Wierzbicki, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2146733.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
transport
polymer
materials
plastics
composites
kompozyt
polimer
tworzywo sztuczne
Opis:
Polymeric materials and their composites in vehicles have experienced a real boom in the last 30 years, and their application is increasing with a tendency to further growth. The demands on the modern vehicle industry, whether they are trains, planes, or cars, are ever challenging - users want high-performance vehicles, but at the same time they are looking for improved reliability and safety, greater comfort, and low pricing. Changing the proportion of light-weight materials to steel in the construction of new vehicles helps make them lighter and more fuel or electrical energy efficient, resulting in lower greenhouse gas emissions. There is one family of materials that is responding to the challenge of these potentially conflicting demands: polymer materials. This includes relatively pure chemical materials as well as fibre-filled polymer composites.65 This article presents polymeric materials that are used for the production of vehicle parts today.
Źródło:
Diagnostyka; 2022, 23, 4; art no 2022405
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review of Nano-thermites: a Pathway to Enhanced Energetic Materials
Autorzy:
Zaky, Mohamed Gaber
Elbeih, Ahmed
Elshenawy, Tamer
Powiązania:
https://bibliotekanauki.pl/articles/27787860.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
energetic materials
nanothermite
synthesis
applications
Opis:
Nano-thermites or metastable intermolecular composites (MICs) have been implemented into modern research on energetic materials as they offer much higher energy densities, higher rates of energy release, stability, and safety (lower sensitivity). This paper reviews several synthetic methods for MICs that have been well thought-out for energetic applications, advantages and disadvantages, as well as the characteristics of each manufacturing technique. The techniques presented include powder mixing, sol-gel, synthesis of MICs based on nano-porous silicon (Psi), sputtering, multilayer nano-foils and electrolytically plated carbon nano-materials for nano-thermite applications. These techniques offer enormously different characteristics and, through the variation of various chemical techniques and conditions, a wide range of chemical and energetic properties may be attained. This may give the opportunity for the safe use of MICs as replacements for some conventional energetic materials in various applications, and may also enable us to study the effects when incorporating these MICs into energetic matrixes, as a promising and feasible research field.
Źródło:
Central European Journal of Energetic Materials; 2021, 18, 1; 63--85
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method of Formation of Thermophysical Properties of Porous Materials
Metoda formowania właściwości termofizycznych materiałów porowatych
Autorzy:
Koshlak, Hanna
Pavlenko, Anatoliy
Powiązania:
https://bibliotekanauki.pl/articles/1812004.pdf
Data publikacji:
2019
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
porous materials
composite insulation materials
alkaline silicate
thermal bloating
materiały porowate
kompozytowe materiały termoizolacyjne
krzemiany alkaliczne
termiczne wzdęcia
Opis:
The study of the porosity of thermal insulation made of refractory materials is an important task for the power industry, since the thermal conductivity of porous materials depends on the shape and especially the location of the pores. An analytical review of existing technologies shows that research in this area is not enough to simulate the process of heat and mass transfer in porous alumina material. Experimental determination of the characteristics of heat and mass transfer in porous materials during the formation of a porous structure is a pressing scientific problem. This article analyzes the influence of the composition of materials on the formation of pores, as well as the effect of various impurities and temperature on the thermal conductivity of the material.
Porowatość izolacji termicznej wykonanej z materiałów ogniotrwałych jest ważnym zadaniem dla energetyki, ponieważ przewodność cieplna materiałów porowatych zależy od kształtu, a zwłaszcza od lokalizacji porów. Analiza analityczna istniejących technologii pokazuje, że badania w tej dziedzinie nie są wystarczające do symulacji procesu przenoszenia ciepła i masy w porowatym materiale z tlenku glinu. Eksperymentalne określenie charakterystyki transferu ciepła i masy w materiałach porowatych podczas tworzenia struktury porowatej jest palącym problemem naukowym. W artykule przeanalizowano wpływ składu materiałów na powstawanie porów, a także wpływ różnych zanieczyszczeń i temperatury na przewodność cieplną materiału.
Źródło:
Rocznik Ochrona Środowiska; 2019, Tom 21, cz. 2; 1253-1262
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane elementy gospodarki surowcowej na wydziale wielkopiecowym huty stali
Selected elements of raw materials management in blast furnace department of steelworks
Autorzy:
Kardas, Edyta
Powiązania:
https://bibliotekanauki.pl/articles/1385067.pdf
Data publikacji:
2019
Wydawca:
Polskie Wydawnictwo Ekonomiczne
Tematy:
surowce
gospodarka surowcami
prognozowanie
surówka wielkopiecowa
raw materials
raw materials management
forecasting
pig iron
Opis:
Produkcja surówki wielkopiecowej wymaga ogromnej ilości surowców i materiałów do produkcji. Ciągłość pracy wielkiego pieca powoduje, że nie mogą wystąpić sytuacje braku surowców w magazynie. Celem artykułu jest charakterystyka problemu gospodarki surowcowej w wybranym Wydziale Wielkopiecowym jednej z polskich hut. Artykuł ten dotyczy tylko jednego rodzaju surowców, tj. rud żelaza. W pierwszej części dokonano analizy wielkości i struktury dostaw surowców do zakładu. W drugiej jego części oceniono wielkość produkcji surówki i jednostkowe zapotrzebowanie na poszczególne surowce i materiały. W ostatniej części dokonano próby prognozy produkcji i zapotrzebowania na rudy. W analizie uwzględniono wyniki zebrane w analizowanym Wydziale Wielkopiecowym i obejmujące 1 rok kalendarzowy.
The production of pig iron requires a huge amount of raw materials and materials for production. The continuous operation of blast furnace means that there cannot be situation of lack of raw materials in the warehouse. The main purpose of the paper is the characteristics of problem of raw materials management in the selected Blast Furnace Department in one of Polish steelworks. This paper applies only to one type of raw materials: iron ores. In the first part the analysis of volume and structure of raw materials supply to the plant is presented. In the second part, the volumes of pig iron production and unit demand for individual raw materials and materials were assessed. In the last part of the paper, the attempt of forecasting of production and demand for iron ores was made. The analysis takes into account the results collected in the analyzed Blast Furnace Department and covers the period of 1 calendar year.
Źródło:
Gospodarka Materiałowa i Logistyka; 2019, 11; 15-22
1231-2037
Pojawia się w:
Gospodarka Materiałowa i Logistyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hazards of the road transportation of hazardous materials
Autorzy:
Stolecka, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/88631.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
hazardous materials
hazards
road transportation
materiały niebezpieczne
substancje niebezpieczne
zagrożenia
transport drogowy
Opis:
A lot of substances and items are transported by road, sea, rail and air every day. The biggest hazard is created by the transportation of hazardous substances with flammable, caustic or toxic properties. The hazard level increases if such sub-stances are transported through densely populated areas. Traffic intensity, the technical condition of vehicles, drivers’ errors or ignorance and non-compliance with legal regulations are examples of factors that can lead to potential failures in the transport sector. Accidents can cause an uncontrolled release of dangerous gases or liquids, resulting e.g. in environmental degradation or a hazard to humans. The article presents the issues related to the hazards presented by road transportation of hazardous materials. Examples are shown of potential effects of accidents and hazard zones arising due to a release of selected hazardous substances, such as chlorine, ammonia, petrol, diesel oil or LPG.
Źródło:
System Safety : Human - Technical Facility - Environment; 2020, 2, 1; 237-246
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chińska polityka surowcowa
Chinese raw materials policy
Autorzy:
Maksymowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2075468.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Chiny
nauka
surowce
cena
miedź
węgiel
China
science
raw materials
prices
copper
coal
Opis:
Our increasing economic relations with China provide an opportunity to compare raw materials economies in both countries. They are completely different. A modern form of raw materials management in China is based on scientific analyses of universities and research institutes which, at their own initiative, submit their proposals to the Chinese Government. They are numerous in every issue, and even conflicting as regards the methods, conclusions and purposes. The Government selects the best options, providing broad and comprehensive justification for each of them. This method has brought to China a worldwide investment success in raw materials economy. If we want to cooperate with China in thisfield, it is worthwhile to take advantage of its experience in this matter.
Źródło:
Przegląd Geologiczny; 2016, 64, 10; 789--790
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of applications of smart materials and methods in fluid valves and drives
Autorzy:
Milecki, Andrzej
Rybarczyk, Dominik
Powiązania:
https://bibliotekanauki.pl/articles/100208.pdf
Data publikacji:
2019
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
electrohydraulics
valve
drive
smart materials
Opis:
In the paper the investigations performed at the Division of Mechtronic Devices at Poznan University of Technology in the area of application of both: smart materials in electro-hydraulic and electro-pneumatic valves, and new methods to control of hydraulic servo drives, are presented. In a first part the piezo bender actuator is shortly described and its application in servo valve is proposed. This actuator replaced the torque motor in the available on the market servo valve. The new valve simulation model is proposed. The simulation and investigations results of the servo valve with the piezo bending actuator are included. In the next part of the paper the application of piezo tube actuator in flapper-nozzle pneumatic valve is described. The test stand and investigations results are presented. Later, in the article, the Model Following Control (MFC) and Fractional order Control (FoC) methods are described. Their application in control of electrohydraulic servo drive is proposed. Some investigations results are included in the paper, showing the advantages of those control methods.
Źródło:
Journal of Machine Engineering; 2019, 19, 4; 122-134
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogel-based materials for delivery medicinal plant extracts – preliminary studies
Autorzy:
Kozłowska, Justyna
Sienkiewicz, Marta
Lipińska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1844902.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
plants
materials
hydrożele
implanty
materiały
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 29
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aminonitronaphthalenes as Possible High Energy Density Materials
Autorzy:
Murawski, R. J.
Ball, D. W.
Powiązania:
https://bibliotekanauki.pl/articles/358002.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
high energy density materials
aminonitronaphthalenes
density functional theory calculations
Opis:
As part of a series of studies evaluating the thermodynamic properties of new potential high energy materials, a series of calculations was performed on a variety of naphthalene molecules having amino and nitro groups. Calculations on seven aminonitronaphthalene molecules were performed, determining their minimum-energy geometries, vibrational frequencies, and energies. Enthalpies of formation were determined using atomization reactions, and subsequently enthalpies of combustion or decomposition were determined. Specific enthalpies of decomposition ranged from 4.1-4.8 kJ/g, while specific enthalpies of combustion ranged more widely, from 13 to almost 21 kJ/g. Some detonation properties of some of the derivatives rival those of current HEDMs.
Źródło:
Central European Journal of Energetic Materials; 2015, 12, 1; 3-12
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating the Approximation Uncertainty for Digital Materials Subjected to Stress Relaxation Tests
Autorzy:
Adamczak, S.
Bochnia, J.
Powiązania:
https://bibliotekanauki.pl/articles/220966.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital materials
stress relaxation
approximation uncertainty
Opis:
The main aim of the study was to determine the goodness of fit between the relaxation function described with a rheological model and the real (experimental) relaxation curves obtained for digital materials fabricated with a Connex 350 printer using the PolyJet additive manufacturing technology. The study involved estimating the uncertainty of approximation of the parameters of the theoretical relaxation curve. The knowledge of digital materials is not yet sufficient; their properties are not so well-known as those of metallic alloys or plastics used as structural materials. Intensive research is thus required to find out more about their behavior in various conditions. From the calculation results, i.e. the uncertainty of approximation of the relaxation function parameters, it is evident that the experimental curves coincide with the curves obtained by means of the solid model when the approximation uncertainty is taken into account. This suggests that the assumed solid model is well-suited to describe a real material.
Źródło:
Metrology and Measurement Systems; 2016, 23, 4; 545-553
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka terrorystycznych materiałów wybuchowych i związanych z nimi problemów
Characterization of terroristic explosive materials and related problems
Autorzy:
Rećko, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/2200778.pdf
Data publikacji:
2022
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
materiały wybuchowe
terrorystyczne materiały wybuchowe
materiały wybuchowe produkcji domowej
IED
explosive materials
terroristic explosive materials
home made explosives
Opis:
Improwizowane ładunki wybuchowe (IED) są śmiertelnym zagrożeniem dla żołnierzy w działaniach wojennych. Do tej pory ich stosowanie było charakterystyczne dla konfliktu zbrojnego w Iraku i Afganistanie. Aktualnie materiały tego typu są także wykorzystywane w wojnie na Ukrainie. Ich popularność wynika przede wszystkim ze względu na łatwy dostęp do materiałów wybuchowych i pirotechniki (np. z niewybuchów), odczynników chemicznych, a także specjalistycznej wiedzy, którą można pozyskać w Internecie. Wymienione czynniki przyczyniają się do powstawania skutecznych środków walki, zdolnych do rażenia siły żywej oraz niszczenia sprzętu wojskowego przeciwnika, przy minimalnym koszcie i niewielkich nakładach pracy. Obecnie problem improwizowanych materiałów wybuchowych jest szczególnie poważny przez wzgląd na fakt, iż praktycznie każdy jest w stanie wykonać materiały wysokoenergetyczne we własnym domu, przy wykorzystaniu ogólnodostępnych odczynników chemicznych lub pozyskać je z niewybuchów z użyciem prostych narzędzi. Sprawę dodatkowo komplikuje fakt, że na skutek eksperymentów, w „domowych laboratoriach” powstają coraz to nowsze materiały wybuchowe, które nie są jeszcze znane i przebadane, co potęguje zagrożenie związane z IED. W artykule przeanalizowano i scharakteryzowano materiały wybuchowe stosowane przez grupy terrorystyczne oraz amatorów pirotechniki. Poruszono również problem powszechnego dostępu do wiedzy i materiałów niezbędnych do skonstruowania materiałów wybuchowych.
Improvised Explosives Devices (IEDs) are a lethal threat to soldiers in hostilities. Until now, their use has been characteristic of the military conflict in Iraq and Afghanistan. Currently, IEDs are also used in the war in Ukraine. Their popularity is mainly due to easy access to explosives and pyrotechnics (e.g. from unexploded bombs), and chemical reagents, as well as specialistic knowledge that can be obtained online. These factors contribute to creation of effective means of combat, capable of destroying manpower and enemy's military equipment at a minimal cost and amount of work. Currently, problem of improvised explosives is particularly serious due to the fact that virtually everyone is able to make high-energy materials at home, using commercially available chemical reagents or obtaining them from unexploded explosives, and using simple tools. The matter is further complicated by the fact that, as a result of experiments, newer and newer explosives are created in "home laboratories". Those explosives are not yet widely known and tested, which increases the risk associated with IED. In this article, explosives used by terrorist groups and amateurs of pyrotechnics have been analyzed and characterized. The problem of universal access to knowledge and materials necessary to construct explosives was also discussed.
Źródło:
Problemy Techniki Uzbrojenia; 2022, 51, 161; 91--118
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BHP przy przewozach materiałów niebezpiecznych
Occupational health and safety in the transport hazardous materials
Autorzy:
Dorobek, S.
Kowalewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/309731.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
działania ratownicze
procedury ratownicze
BHP
materiały niebezpieczne
przewóz materiałów niebezpiecznych
rescue operations
rescue procedures
dangerous materials
transportation of hazardous materials
Opis:
W artykule omówiona została problematyka wprowadzania prawidłowych procedur ratowniczych w zakresie wypadków i awarii, które mogą zagrażać bezpieczeństwu podczas przewozu, załadunku lub rozładunku towarów niebezpiecznych
Since 2005, the transport of dangerous goods can be distinguished as a special group of goods called “large risk goods”. There are goods which can be used for terrorist purposes or contrary to their intended use, demonstrating a high risk of danger to people, propertyor the environment, eg. explosive substances and articles, poisonous, flammable or infectious.Special procedures must be used during the carriage of these goods. The carrier is required to develop and to implement a Protection Plan of Dangerous Goods of High Risk, in accordance with the rules of chapter 1.10. of ADR
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 146-155
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tekstylia w materiałach kompozytowych
Textiles in composite materials
Autorzy:
Janicka, J.
Koźmińska, R.
Powiązania:
https://bibliotekanauki.pl/articles/237906.pdf
Data publikacji:
2009
Wydawca:
Instytut Technologii Bezpieczeństwa Moratex
Tematy:
materiały kompozytowe
materiały włókiennicze
przemysł poligraficzny
composite materials
textiles
printing industry
Opis:
Obserwuje się coraz większe zainteresowanie technicznymi kompozytami wytwarzanymi z udziałem materiałów włókienniczych. Kompozyty wykonane z udziałem włóknin, dzianin czy tkanin znajdują zastosowanie w wielu gałęziach przemysłu jak również w medycynie, rolnictwie, rybołówstwie itp. Można stwierdzić, że obecnie właściwie nie ma dziedziny, w której nie odnajdziemy materiałów włókienniczych jako surowca podstawowego lub składowego wytwarzanych produktów. W artykule przedstawiono prace badawcze, których efektem było opracowanie nowych asortymentów kompozytów wytwarzanych przede wszystkim na bazie materiałów dzianych, a wykorzystywanych w introligatorstwie, poligrafii i budownictwie. W wyniku zrealizowanych badań opracowano technologie technicznych kompozytów stosowanych na: materiały okleinowe dla poligrafii i producentów opakowań ozdobnych, siatek ściernych do szlifowania gładzi gipsowych, płyt gipsowo kartonowych, szpachlówek, szlifowania tynku i powierzchni malowanych oraz do czyszczenia i matowania stali, drewna, plastiku i metali kolorowych, taśm hydroizolacyjnych m.in. do uszczelniania spoin, połączeń ściennych i przypodłogowych oraz narożników przed przenikaniem wody i wilgoci.
More and more interest in technical composites made with a share of textile material is observed. The composites made with a share of non-woven, knits or fabrics applied find applications at many industry branches, as well as in medicine, agriculture, fishery etc. One could state, that nowadays there's no area, where we can't find any textile materials as a basic or component material for manufactured products. The article presents research works, result of which was developing new ranges of composites manufactured before all on a basis of knit materials, and being used in bookbinding, typography and constructions. As a result of completed research, the technologies of technical composites have been developed for the following applications: veneer materials for typography and decoration wrappers manufacturers, meshes for grinding the plaster smooth surfaces, cardboard-plaster panels, putties, grinding the plaster and painted surfaces as well as for cleaning and matting the steel, wood, plastic and colour metals, hydro-insulating bands, i.a. for sealing the welds, joints of walls and floors as well as the corners against penetration of water and moisture.
Źródło:
Techniczne Wyroby Włókiennicze; 2009, R. 17, nr 1, 1; 20-28
1230-7491
Pojawia się w:
Techniczne Wyroby Włókiennicze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polymer composites modified by waste materials containing wood fibres
Autorzy:
Dębska, B.
Lichołai, L.
Godek, P.
Powiązania:
https://bibliotekanauki.pl/articles/123947.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
polymer composites
epoxy mortar
waste materials
mechanical properties
Opis:
In recent years, the idea of sustainable development has become one of the most important requirements of civilization. Development of sustainable construction involves the need for the introduction of innovative technologies and solutions that will combine beneficial economic effects with taking care of the health and comfort of users, reducing the negative impact of the materials on the environment. Composites obtained from the use of waste materials are part of these assumptions. These include modified epoxy mortar containing waste wood fibres, described in this article. The modification consists in the substitution of sand by crushed waste boards, previously used as underlays for panels, in quantities of 0%, 10%, 20%, 35% and 50% by weight, respectively. Composites containing up to 20% of the modifier which were characterized by low water absorption, and good mechanical properties, also retained them after the process of cyclic freezing and thawing.
Źródło:
Journal of Ecological Engineering; 2016, 17, 5; 72-78
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shaping of Panel Materials in Light Direction Design
Autorzy:
Urzędowski, A.
Wójcicka-Migasiuk, D.
Powiązania:
https://bibliotekanauki.pl/articles/354766.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reflective materials
illumination channels
surface shaping
reflection
non-imaging optics
Opis:
Abstract The paper presents the methodology of the analysis of the materials used in solar energy conversion, and an elaborated example with simulations of obtained results. Material properties are selected in relation to the need of sunlight illumination applications in civil constructions. This process is presented , starting from the analysis of some aspects of solar radiation, through the calculations of lens curvature and leading to the execution of simulations in different conditions. Graphical presentation of the phenomenon, it can visualize the process of shaping curves. The materials such as glass, polymers, metals, and gases have been discussed. Particular attention was paid to the results of the transmission of materials, their reflection and absorption of solar radiation. Moreover, the research problems of illumination and reflection in multi-layer structures used for civil constructions have been presented.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 941-945
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polymetallic concretions – long-range source of mineral raw materials
Konkrecje polimetaliczne – długoterminowe źródło surowców mineralnych
Autorzy:
Niedoba, T.
Powiązania:
https://bibliotekanauki.pl/articles/318200.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
konkrecje polimetaliczne
głębiny oceanu
surowce mineralne
rzadkie pierwiastki
wydobycie kopalin
polymetallic concretions
ocean depths
mineral raw materials
trace elements
materials extraction
Opis:
In time when traditional resources of mineral raw materials are getting low in many locations on land, polymetallic concretions are interesting alternative for them. Ther are usually oval agglomerations of many elements, mainly containing iron and manganese. They can be found usually in oceanic depths on 3000-5000 m below sea level depth, mainly in Pacific Ocean basin. The paper presents the genesis of concretions, their main locations of occurring and conditions concerning their potential extraction. The potential benefits occurring from their exploitation were presented. Furthermore, the ways of their extraction with evaluation of the applicability of certain methods were discussed. The actual law situation connected with concretions exploitation with historical background was presented too. The possibilities of Poland in this range concerning extraction of concretions and its share in investigations were evaluated. Poland has the allotment in Clarion-Clipperton area which was presented in the paper with discussion over the research conducted by the organization called Interoceanmetal.
W czasie gdy tradycyjne źródła surowców mineralnych są w wielu miejscach na wyczerpaniu, konkrecje polimetaliczne stanowią dla nich ciekawą alternatywę. Są to zazwyczaj owalne skupiska wielu pierwiastków, głównie żelaza i manganu, które znaleźć można w głębinach oceanicznych na głębokości około 3000-5000 m p.p.m., głównie w basenie Oceanu Spokojnego. W artykule przedstawiono genezę powstania konkrecji, ich główne miejsca występowania oraz uwarunkowania dotyczące potencjalnego ich wydobycia. Przedstawiono korzyści jakie wyniknąć mogą z ich eksploatacji. Omówiono potencjalne sposoby ich wydobycia wraz z oceną stosowalności danych metod. Ponadto, przedstawiono aktualną sytuację prawną związaną z eksploatacją konkrecji wraz z jej rysem historycznym. Na tym tle oceniono możliwości Polski w kwestii wydobycia konkrecji oraz jej udział w badaniach dotyczących tego zagadnienia. Przedstawiono działkę przydzieloną Polsce w tym zakresie w basenie Clarion-Clipperton oraz badania prowadzone przez organizację Interoceanmetal.
Źródło:
Inżynieria Mineralna; 2015, R. 16, nr 1, 1; 61-74
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innowacyjne technologie pozyskiwania ważniejszych surowców ceramicznych i szklarskich
Innovative technologies for manufacturing of the main ceramic and glass-grade raw materials
Autorzy:
Lewicka, E.
Powiązania:
https://bibliotekanauki.pl/articles/169983.pdf
Data publikacji:
2013
Wydawca:
Poltegor-Instytut Instytut Górnictwa Odkrywkowego
Tematy:
innowacyjne technologie
surowce ceramiczne
surowce szklarskie
innovative technologies
ceramic raw materials
glass-grade raw materials
Opis:
W artykule poddano ocenie najnowsze, innowacyjne rozwiązania w zakresie technologii pozyskiwania podstawowych surowców ceramicznych i szklarskich, tj. piasków szklarskich, kaolinów i surowców ilastych, surowców skaleniowych, gipsu i anhydrytu, oraz mączek wapiennych i dolomitowych. Przedstawiono charakterystykę każdego z tych surowców pod kątem cech decydujących o przydatności przemysłowej oraz wymagań jakościowych im stawianych we współczesnych technologiach przemysłu ceramicznego, omówiono podstawowe operacje przeróbki i wzbogacania prowadzące do uzyskania produktów o odpowiednich parametrach z punktu widzenia poszczególnych odbiorców z naciskiem na najnowsze zdobycze omawianych technik. Przeanalizowano metody usuwania składników niepożądanych, takich jak: tlenki barwiące, substancja organiczna i minerały ciężkie, a także umożliwiające uzyskanie odpowiedniej zawartości składników użytecznych, uziarnienia oraz składu fazowego. Podkreślono działania na rzecz zmniejszenia zagrożenia środowiska i ilości powstających odpadów, w tym m.in. odchodzenie od metod chemicznych (flotacja z udziałem szkodliwych substancji chemicznych) na rzecz metod fizycznych (separacja magnetyczna).
The article assesses the latest innovations in technologies for manufacturing of basic ceramic and glass-grade raw materials, i.e. quartz sand, kaolin and ceramic clays, feldspathic raw materials, gypsum and anhydrite, as well as limestone and dolomite flours. It presents characteristics of the raw materials in question in terms of features that determine the suitability in the industry and quality requirements addressed to them in modern ceramic plants, discusses the basic operations of their processing and beneficiation that lead to obtaining products with appropriate parameters from the point of view of individual customers with a focus on the latest developments of these techniques. The methods for removing undesirable components such as colouring oxides, organic matter and heavy minerals, and techniques employed in order to obtain relevant content of useful components, grain size and phase composition, there are also examined. The article highlights efforts to reduce environmental risk and the amount of waste generated, including abandonment of chemical methods (flotation involving harmful chemicals) for the physical beneficiation methods (magnetic separation).
Źródło:
Górnictwo Odkrywkowe; 2013, 54, 5-6; 66-72
0043-2075
Pojawia się w:
Górnictwo Odkrywkowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected aspects of research regarding safety of hazardous materials air transportation
Autorzy:
Kucharek, Daniel
Osiak, Beata
Powiązania:
https://bibliotekanauki.pl/articles/534386.pdf
Data publikacji:
2018
Wydawca:
Wyższa Szkoła Biznesu w Dąbrowie Górniczej
Tematy:
Safety
Air transport
Hazardous materials
Hazmat
Research issues
Opis:
Scientific research is fundamental for progress made not only in the field of technology, but also in perceiving the reality that surrounds us, or even increasing the security of our existence. Following article aims to underline the need for research in the area of safety of hazardous materials (Hazmat) air transportation. Its creation does not result from an attempt to confirm something that is commonly known, namely the necessity to conduct research in all areas of science. The authors want to draw attention to narrow but forgotten area of security, associated with rapidly growing branch of air transportation including hazardous materials and various threats related with these. As a result of undertaken analysis of existing risks, the directions in which research should be developed were indicated. Further exploration of those areas of security should lead to identification of additional risks as well as the most effective methods of counteracting them.
Źródło:
Security Forum; 2018, 1, Volume 2 No 1/2018; 113-118
2544-1809
Pojawia się w:
Security Forum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Results for modern bandaging materials application in alveolitis treatment
Autorzy:
Shevela, T. L.
Pohodenko-Chudakova, I. O.
Groshev, E. Y.
Powiązania:
https://bibliotekanauki.pl/articles/285401.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomaterials
bandaging materials
alveolitis
Źródło:
Engineering of Biomaterials; 2011, 14, no. 109-111 spec. iss.; 13-14
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lotnicze zastosowania materiałów inteligentnych
The application of smart materials in aviation
Autorzy:
Ćwikła, A.
Powiązania:
https://bibliotekanauki.pl/articles/213883.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
zastosowania lotnicze
materiały inteligentne
application of smart
materials in aviation
Opis:
W artykule przedstawiono zagadnienia związane z zastosowaniem materiałów inteligentnych w lotnictwie. Przedstawiono krótki opis tych materiałów, ich podstawowe cechy oraz podział tych materiałów. Artykuł zawiera opisy różnorodnych rozwiązań opartych na materiałach inteligentnych. Opisano zarówno układy już istniejqcych, jak i będących w fazie projektowania i badań.
The article presents the issues associated with the use of smart materials in aviation. The article contains description of these materials, their basic characteristics and distribution of these materials. The article contains descriptions of the various solutions based on smart materials. Describes both the existing systems, as well as in the phase of design and research.
Źródło:
Prace Instytutu Lotnictwa; 2011, 2 (211); 48-56
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanoporous Silica-Based Materials for Sorption of Pharmaceuticals and Biomolecules
Autorzy:
Gdula, Karolina
Barczak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/951391.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
nanoporous silica-based materials
adsorption
pharmaceuticals
biomolecules
environmental protection
Opis:
Our concern in this paper is to review four kinds of mesoporous silica materials which can be used as potential sorbents for pharmaceuticals. It is known that a continuous development of science, medicine and food industry has an effect on contamination of the natural environment. Moreover, many impurities, such as drugs, vitamins or proteins etc., which get into environment from urban and hospital wastes, can also influence on human organisms. Thus, there is a need to control an amount of those compounds, especially in the natural waters and wastewaters [1-4]. In this work, we present four types of silica materials which can be helpful in water purification by using adsorption process.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2013, 68, 1-2
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie zużycia ściernego materiałów kompozytowych
Grinding testing of composite materials
Autorzy:
Baier, A.
Żółkiewski, S.
Powiązania:
https://bibliotekanauki.pl/articles/348429.pdf
Data publikacji:
2011
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
ścieranie
tarcie
zużycie ścierne
kompozyty
grinding
friction
composite materials
Opis:
Badanie zużycia ściernego należy do jednych z najistotniejszych badań materiałów mających zastosowanie w powierzchniach styku z innymi tworzywami, tym samym narażonych na nadmierne zużycie ścierne. Badane w pracy próbki kompozytowe, mające znaleźć zastosowanie w budowie burt wagonów towarowych, wykonano z laminatów epoksydowych i poliestrowych. Tematykę pracy ograniczono do samego badania ścieralności, co jest oczywiście jedynie wstępem do kompleksowych badań materiałów do tego typu zastosowań. W pracy przedstawiono propozycję stanowiska laboratoryjnego do porównawczego badania zużycia ściernego oraz przykładowe wyniki badań na wybranych materiałach kompozytowych.
Grinding testing is one of the most important tests of materials applied for contact with other elements. The subject matter is limited to grinding testing and this is only the beginning of complex testing of composite materials. In this article, the tested composite materials are epoxide and polyester laminates. The selected materials can be put into use in the wagon sides construction. This article includes a proposal for a laboratory stand for comparative grinding testing and presents sample test results.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2011, 1; 21-36
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transport materiałów promieniotwórczych
Transport of Radioactive Materials
Autorzy:
Rzymkowski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2171853.pdf
Data publikacji:
2022
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
materiały promieniotwórcze
pojemniki transportowe
kontener
kod IFN
radioactive materials
trasnportation cask
container
IFN code
Opis:
W opracowaniu przedstawiono różne rodzaje i sposoby transportu materiałów promieniotwórczych zalecane przez wymagania ochrony radiologicznej i międzynarodowe organizacje transportowe.
The paper presents various types and methods of transport of radioactive materials recommended by radiation protection requirements and international transport organizations.
Źródło:
Postępy Techniki Jądrowej; 2022, 4; 14--22
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przegląd metod otrzymywania materiałów plazmonicznych oraz wybranych alternatywnych materiałów
Overview of fabrication methods of plasmonic materials and selected alternative materials for plasmonic applications
Autorzy:
Korzeb, K.
Gajc, M.
Pawlak, D.
Powiązania:
https://bibliotekanauki.pl/articles/192201.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych
Tematy:
plazmonika
materiał plazmoniczny
top-down
bottom-up
plasmonics
plasmonic materials
Opis:
Praca przedstawia przegląd literaturowy dotyczący technologii otrzymywania materiałów plazmonicznych oraz propozycji materiałów alternatywnych do obecnie stosowanych materiałów w obszarze plazmoniki. W analizie literaturowej przedstawiono porównanie metod top-down i bottom-up do otrzymywania materiałów plazmonicznych w postaci warstw, jak również jako materiałów objętościowych. Dodatkowo wybrano potencjalnie najkorzystniejsze alternatywne materiały plazmoniczne, które mogą zastąpić współcześnie używane materiały konwencjonalne stosowane w dziedzinie plazmoniki.
In this work we reviewed the fabrication methods of both plasmonic materials and novel alternative materials for plasmonics. The analysis of the literature enabled a comparison of 'top-down' and 'bottom-up' preparation methods of plasmonic materials, in the form of layers as well as bulk materials. In addition, potentially the best alternative plasmonic materials which can replace conventional materials for plasmonics are proposed.
Źródło:
Materiały Elektroniczne; 2014, T. 42, nr 2, 2; 18-29
0209-0058
Pojawia się w:
Materiały Elektroniczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of construction materials in modern landscape design
Autorzy:
Abyzov, V.
Powiązania:
https://bibliotekanauki.pl/articles/345045.pdf
Data publikacji:
2018
Wydawca:
Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
Tematy:
landscape design
traditional building materials
new building materials
traditional building products
new building products
projektowanie krajobrazu
tradycyjne materiały budowlane
nowe materiały budowlane
tradycyjne produkty budowlane
nowe produkty budowlane
Opis:
The article deals with the peculiarities of application, along with traditional, new building materials and products in the landscape design of the urban environment. The techniques and perspectives of their use in contemporary landscape design and compositions are highlighted and examples are given.
Źródło:
Środowisko Mieszkaniowe; 2018, 22; 107-114
1731-2442
2543-8700
Pojawia się w:
Środowisko Mieszkaniowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja konstrukcji transformatorów w aplikacjach elektromobilnych
Autorzy:
Łukiewski, M.
Łukiewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/302992.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Druk-Art
Tematy:
transformatory przetwornic statycznych
materiały amorficzne
materiały nanokrystaliczne
transformers static converters
amorphous materials
nanocrystalline materials
Opis:
W artykule omówiono wybrane zagadnienia optymalizacyjne związane z budową transformatorów pracujących w przetwornicach pojazdów elektromobilnych. Porównano wyniki symulacji wpływu materiału magnetycznego rdzenia na straty i wymiary gabarytowe transformatora. Przedstawiono również optymalizację konstrukcji transformatora w celu zwiększenia skuteczności wymuszonego chłodzenia. Parametry symulowano, wykorzystując oprogramowanie projektowe firmy RALE Engineering GmbH.
In this article selected optimizing issues related to the construction of the transformers worked in static converters of electro-mobile vehicles were discussed. The simulation of the effect of core magnetic material on the losses and transformer sizes have been compared. Moreover, the increase of effected – cooling due to solution of transformer construction were performed. The parameters were simulated using design software by RALE Engineering GmbH.
Źródło:
Napędy i Sterowanie; 2018, 20, 12; 106-109
1507-7764
Pojawia się w:
Napędy i Sterowanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of cement composites using alumina-lignin hybrid materials admixture
Autorzy:
Klapiszewska, Izabela
Ślosarczyk, Agnieszka
Klapiszewski, Łukasz
Jesionowski, Teofil
Powiązania:
https://bibliotekanauki.pl/articles/110198.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
alumina
lignin
hybrid materials
cement composites
Opis:
In the framework of this study, Al2O3-lignin hybrid materials differing in terms of the weight ratio of the inorganic and organic components were designed and obtained. The method of mechanical grinding of ingredients with simultaneous mixing using a mortar grinder and a high-performance ball mill was used in order to obtain the above-mentioned systems. The effectiveness of obtaining alumina- lignin materials was confirmed using Fourier transform infrared spectroscopy (FTIR) and, indirectly, by the colorimetric analysis. FTIR analysis allowed to confirm that hydrogen bonds formed between the components and classify the resulting systems as Ist class hybrid materials. In the course of the conducted research, the relatively high thermal stability of the hybrid materials was also confirmed and the dispersion and morphological character (SEM) of the obtained systems was determined. Favourable physicochemical and microstructural evaluation allowed to qualify the alumina-lignin hybrid systems as functional admixtures for cement mortars. As part of the tests, it was confirmed that the presence of lignin in the cement composites contributes to the increase of the plasticity of the mixture. In turn, the inorganic component allowed to preserve (and, in case of selected systems, improve) the mechanical properties of the final composites. The most favourable results of application tests were obtained for alumina-lignin hybrid systems with a weight ratios equal to 5:1 and 2:1. The analysis of these systems indicated that there is a clear improvement of mechanical properties, whit a simultaneous enhancement of the plasticity of the mixture in comparison to the reference sample.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 6; 1401-1412
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł

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