Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "materials" wg kryterium: Wszystkie pola

  Lista filtrów

Dostawca treści

Podbaza

Wyrównaj
Wyświetlanie 1-15 z 5249
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:
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:
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:
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
Wyświetlanie 1-15 z 5249

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies