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Wyszukujesz frazę "SAW" wg kryterium: Temat


Tytuł:
Concept of an innovative technological line for the processing of linear profiles
Autorzy:
Gustowski, Tomasz
Kurek, Waldemar
Grzejda, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/26081758.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
profile liniowe
zautomatyzowana linia technologiczna
cięcie łukiem plazmowym
cięcie piłą tarczową
robot spawalniczy
linear profiles
plasma arc cutting
circular saw cutting
welding robot
automated technological line
Opis:
The paper presents the concept of an innovative technological line intended for the processing of long linear profiles used in engineering steel and aluminium structures, which can be both hollow and open section profiles. The line is set up with seven main sections: profile loading system, input roller conveyor, plasma arc cutting section, circular saw cutting section, robot welding section, output roller conveyor and profile packaging system. The assumptions adopted to create the concept of the techno-logical line were specified. A block diagram of the line and drawings showing the structure of its selected elements were depicted. The features of the technological line documenting its product and process innovativeness were indicated. The proposed technological line is built in the AGICO Group company, but it can also be successfully implemented in other companies dealing with the processing of long linear profiles.
Źródło:
Production Engineering Archives; 2023, 29, 1; 7--13
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Physico-Chemical Properties of Submerged Arc Welding Fluxes on Pipeline Steel - A Brief Review
Autorzy:
Sharma, Lochan
Chhibber, Rahul
Powiązania:
https://bibliotekanauki.pl/articles/27313869.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
pipeline steel
submerged arc welding fluxes
SAW
physico-chemical properties
structural integrity issue
mechanical properties
Opis:
Pipeline welding is an integral part of oil and gas exploration industries. Often the welded joint failures were due to lack of weld quality, improper heat treatment and even poor workmanship. Further, the use of new material in pipeline industry puts focus on a better understanding of qualifying requirements of welding for reducing the failures in future. This necessitates the need for development and design of suitable welding fluxes for joining these materials. In this paper an attempt is made to study the effects of submerged arc welding fluxes on weldability as well as structural integrity issues in pipeline steels. Physicochemical and thermophysical properties of submerged arc fluxes widely affects the mechanical behaviour of pipeline steels. This paper presents an overview of the role of welding parameters, flux composition, cooling rate, slag behaviour and physicochemical properties of slag on final welded joint properties such as tensile strength, impact toughness etc. during submerged arc welding.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 409-421
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of 5-α-reductase inhibition in supressing progression of male androgenetic alopecia − a postulate for further studies on possible application of saw palmetto extracts
Rola inhibicji 5-α-reduktazy w zatrzymaniu postępu łysienia androgenowego u mężczyzn – postulat na rzecz badań nad zastosowaniem ekstraktów z palmy sabałowej
Autorzy:
Piwecki, Marcin
Urban, Aleksandra
Pełszyńska, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/16455282.pdf
Data publikacji:
2023-10-04
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
5-α-reductase
androgenetic alopecia
dihydrotestosterone
hair follicle
inhibitors
saw palmetto
steroids
sterols
5-α-reduktaza
łysienie androgenowe
dihydrotestosteron
mieszek włosowy
inhibitory
palma sabałowa
sterydy
sterole
Opis:
The study presents the mechanism of male androgenetic alopecia (MAGA), with a focus on the role of the enzyme 5-α-reductase, which is responsible for converting testosterone, the primary male hormone, into its active form, dihydrotestosterone (DHT). The consequences of the DHT stimulation of androgen receptors (ARs) located in the X chromosome of dermal papilla cells (DPCs) are described. This leads to androgen-induced gene transcription, disrupted hair follicle nourishment, and most importantly, an accelerated transition from the anagen to the catagen phase. The study also discusses how this enzyme can be targeted by molecules acting as inhibitors. Furthermore, the justification for conducting more in-depth studies on the mechanisms of action involving extracts of saw palmetto (Serenoa repens) and their inhibitory effects on 5-α-reductase is presented. The study also advocates the identification and measurement of active substances present in saw palmetto extracts, with two promising phytosterolic compounds, stigmasterol and β-sitosterol, due to their demonstrated inhibitory activity on 5-α-reductase in extracts from other plant species. As part of the proposal to deepen the research, attention is drawn to the need to investigate the impact of saw palmetto extract on the hair growth cycle, hair follicle life cycle, various growth factors and angiogenesis, immune system activity, and oxidative stress. Other areas of observation for the action of saw palmetto extracts could include their use in combination with other plant extracts or therapeutic agents such as platelet-rich plasma or fibrin-rich plasma.
W pracy przedstawiono mechanizm łysienia androgenowego u mężczyzn (male androgenetic alopecia – MAGA) z uwzględnieniem roli enzymu 5-α-reduktazy, która odpowiada za konwersję testosteronu, najważniejszego hormonu męskiego, do jego aktywnej formy – dihydrotestosteronu (DHT). Opisane zostały konsekwencje pobudzenia przez DHT receptorów androgenowych (androgen receptors – ARs), zlokalizowanych w chromosomie X komórek linii brodawkowej (dermal papilla cells – DPCs). Powoduje to transkrypcję genów uruchamianą przez androgeny, zostaje zaburzone odżywianie mieszka włosowego, ale przede wszystkim przyspieszeniu ulega moment zakończenia anagenu i przejścia do fazy katagenu. Przedstawiono również, w jaki sposób enzym ten może być poddawany działaniu molekuł pełniących funkcję jego inhibitorów. Ponadto zaprezentowano uzasadnienie dla prowadzenia bardziej dogłębnych badań poświęconych mechanizmom działania, w których ekstrakty palmy sabałowej (Serenoa repens) wywołują efekt inhibicji 5-α-reduktazy. Dodatkowo w pracy został zawarty postulat na rzecz rozpoznawania i pomiaru substancji aktywnych znajdujących się w ekstraktach palmy sabałowej, w tym dwóch najbardziej obiecujących związków fitosterolowych – stigmasterolu i β-sitosterolu – ze względu na udowodnioną już aktywność inhibitorową w stosunku do 5-α-reduktazy w ekstraktach z surowców pochodzących z innych gatunków roślin. W ramach postulatu na rzecz pogłębienia badań zwrócono uwagę na konieczność oceny wpływu stosowania ekstraktów z palmy sabałowej na cykl życia włosów, cykl życia mieszka włosowego, różne czynniki wzrostu i angiogenezę, a także aktywność układu immunologicznego czy stres oksydacyjny. Inne obszary obserwacji działania ekstraktów z palmy sabałowej mogłyby obejmować ich zastosowanie w terapiach w połączeniu z innymi ekstraktami roślinnymi lub środkami terapii, np. z osoczem bogatopłytkowym czy osoczem bogatym w fibrynę.
Źródło:
Annales Academiae Medicae Silesiensis; 2023, 77, 1; 190-196
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie palmy sabałowej w terapii łagodnego przerostu prostaty
The use of saw palmetto in the treatment of benign prostatic hyperplasia
Autorzy:
Zielińska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/11340522.pdf
Data publikacji:
2023-09-01
Wydawca:
Wydawnictwo Naukowe Medyk sp. z o.o.
Tematy:
prostata
łagodny rozrost gruczołu krokowego
palma sabałowa
kwasy tłuszczowe
prostate
benign prostatic hyperplasia
saw palmetto
fatty acids
Opis:
Palma sabałowa (Serenoa repens, bocznia piłkowana, Saw palmetto) pochodzi z południowo-wschodniej Ameryki Północnej, głównie z Florydy. W fitoterapii stosowany jest ekstrakt z jagód zawierający 85–90% kwasów tłuszczowych (m.in. kaprylowy, palmitynowy, oleinowy) oraz steroli, takich jak beta-sitosterol. Ekstrakt powszechnie spożywany jest jako suplement we wspomaganiu leczenia objawów ze strony dolnych dróg moczowych u mężczyzn oraz w łagodnym przeroście prostaty. Pomimo dużej liczby publikacji, niejasna jest jego potencjalna rola w leczeniu tych schorzeń. Jednak wielu specjalistów zaleca stosowanie preparatów zawierających wysokiej jakości lipidowo-sterolowy ekstrakt z palmy jako terapię wspomagającą w przypadku łagodnych do umiarkowanych objawów.
Saw palmetto (Serenoa repens) is native to the southeast regions of North America, especially abundant in Florida. The extract from its berries is used in phytotherapy, containing 85–90% of fatty acids (including caprylic, palmitic, oleic acids) and sterols such as beta-sitosterol. Lipidosterolic extract is commonly consumed as a supplement to support the treatment of lower urinary tract symptoms in men and benign prostatic hyperplasia. Despite the large number of publications, uncertainty remains about its potential role in the treatment of these conditions. However, many specialists recommend the use of preparations containing high-quality lipidosterolic palm extract as an adjunctive therapy for mild to moderate symptoms.
Źródło:
Lek w Polsce; 2023, 387, 8; 29-33
2353-8597
Pojawia się w:
Lek w Polsce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of pure Love mode SAW sensor with graphene interdigital transducer for biosensing applications
Autorzy:
Chen, Chen
Wang, Xinyu
Wang, Yuting
Powiązania:
https://bibliotekanauki.pl/articles/2233256.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
SAW biosensor
Love mode
graphene
mass sensitivity
Opis:
The characteristics of Love wave biosensors are systematically investigated. The results show that sensors with combination of a ZnO guiding layer and 90ST or 90AT Quartz substrates exhibit purer Love modes than those with the SiO2 guiding layer. The corresponding maxi- mum sensitivities are −10.9069 and −11.641m2/kg, respectively, which are nearly two times higher than those of SiO2 layer. The ZnO/90ST Quartz Love wave sensor exhibits the largest K2 of 0.3022 and achieves 0 ppm/oC of TCF at hZnO/λ = 0.0216. The sensor employing the Graphene IDT further improves the sensitivity by nearly one order of magnitude.
Źródło:
Journal of Theoretical and Applied Mechanics; 2022, 60, 4; 551--559
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prototyp przecinarki z frezem tarczowo-piłkowym mocowanym od spodu przedmiotu obrabianego
Prototype of the cutter with a circular saw blade fixed from the bottom of the workpiece
Autorzy:
Gustowski, Tomasz
Kurek, Waldemar
Samsonik, Krystian
Grzejda, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/2175489.pdf
Data publikacji:
2022
Wydawca:
STE GROUP
Tematy:
circular saw
circular saw blade
long line profiles
high-speed steel
TiN coating
przecinarka tarczowa
frez tarczowo-piłkowy
długie profile liniowe
stal szybkotnąca
powłoka TiN
Opis:
W artykule przedstawiono prototyp przecinarki tarczowej z narzędziem mocowanym od spodu przedmiotu obrabianego. Układ przeznaczony jest do obróbki długich profili liniowych stosowanych w stalowych konstrukcjach inżynierskich. Umożliwia cięcie profili o zamkniętych lub otwartych przekrojach poprzecznych na zadany wymiar. Układ jest częścią innowacyjnej linii technologicznej do automatycznego cięcia plazmowego, cięcia frezem tarczowo-piłkowym oraz spawania z wykorzystaniem robotów spawalniczych.
In the paper, a prototype of a circular saw with a tool fixed from the bottom of the workpiece is introduced. The system is intended for the processing of long linear profiles used in engineering steel structures. It enables cutting profiles with closed or open cross-sections to a given size. The system is part of an innovative technological line for automatic plasma cutting, circular saw cutting and welding with use of welding robots.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2022, 11, 2; 57--65
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and Optimization of Saw Blade Production in Plant Simulation
Autorzy:
Malega, Peter
Daneshjo, Naqib
Rudy, Vladimír
Rehák, Róbert
Powiązania:
https://bibliotekanauki.pl/articles/2201772.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
saw blade
Plant Simulation
optimization
production process
simulation model
Opis:
This paper is oriented on very important topics, which nowadays simulation and optimization surely are. First part of this paper is oriented on simulation software Plant Simulation, because this software is one of the best software on the market. Second section deals in detail with the procedure of saw blades production. Third section presents creation of simulation model for selected production process, which is production of saw blades. Final fourth section is about proposals for improvement of saw blade production.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 3; 67--77
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of airside aerodrome infrastructure by SAW method with weights from Shannons interval entropy
Autorzy:
Żak, Jolanta
Gołda, Paweł
Cur, Krzysztof
Zawisza, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2067399.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
entropy
aerodrome infrastructure
SAW
Opis:
Multi-criteria decision support (MCDM) methods are widely used in many areas of science. This applies to economic, social and technical sciences. Implementing activities at the strategic, tactical or operational level requires appropriate tools to support decision-makers. The use of these tools requires the preparation of a decision model along with the formalization of the goal and the acquisition and preparation of data to make the decision accurate. Due to the wide application of MCDM in engineering practice, the article presents their application in air transport. It is an area that is constantly evolving, and all decisions at the strategic level have long-term effects and must be adequately justified. In the paper a compartmental extension of the classical SAW method with weights obtained using the compartmental Shannon entropy was proposed. This paper presents issues concerning the choice of airport layout and describes the problems that occur in determining the cost and capacity of airports. This paper reviews the literature on airport capacity and operations and airside air transport processes and the application of various multi-criteria decision support methods to airport problems. The main part of the article contains an optimization mathematical model aimed at determining the parameters of the elements comprising the airport, on the basis of which a simulation model was developed and a modified method of multi-criteria evaluation of SAW taking into account the interval numbers was presented, in which the set of weights was estimated by the Shannon entropy method. In the application part for 3 variants of the airport arrangement, the parameters were determined in the form of interval numbers and then evaluated using the presented method. The presented numerical example shows that the proposed method is an excellent tool to assist in solving complex decision problems where the data are imprecise and represented by interval numbers.
Źródło:
Archives of Transport; 2021, 60, 4; 171--185
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of thermal modification temperature of spruce wood on cutting parameters during circular saw blade cutting
Autorzy:
Hlásková, Luďka
Kopecký, Zdeněk
Novák, Vit
Powiązania:
https://bibliotekanauki.pl/articles/2146674.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
thermal modification
cutting force
specific cutting resistance
circular saw blade
spruce
Opis:
Effect of thermal modification temperature of spruce wood on cutting parameters during circular saw blade cutting. The work examines the effect of temperature on energetical parameters (specific cutting resistance and cutting force) when cutting heat-treated wood of Norway spruce (Picea Abies) by a circular saw. The test samples were heat-treated at 160°C, 180°C, 200°C and 220°C. One sample was not heat treated and was used as a reference sample. In comparison with the theoretical assumptions, the influence of temperature on the cutting force and specific cutting resistance was confirmed. With increasing temperature of modification, the specific cutting resistance and cutting force decreased. The reduction of value of cutting force is related to changes in the chemical structure of the wood components, weight and density loss due to the increasing temperature of modification.
Wpływ temperatury modyfikacji termicznej drewna świerkowego na parametry skrawania podczas cięcia piłą tarczową. W pracy zbadano wpływ temperatury modyfikacji na parametry skrawania (oprór skrawania i siła skrawania) przy cięciu piłą tarczową drewna świerka pospolitego (Picea Abies) poddanego obróbce termicznej. Próbki drewna do badań poddano obróbce w temperaturze 160°C, 180°C, 200°C i 220°C. Jako wariant kontrolny wykorzystano drewno naturalne (nie poddane obróbce termicznej). W ramach badan potwierdzono wpływ temperatury modyfikacji na siłę skrawania i opory skrawania drewna. Wraz ze wzrostem temperatury modyfikacji zmniejszały się wartosci oporu skrawania i siły skrawania. Zmniejszenie wartości siły skrawania związane jest ze zmianami struktury chemicznej składników drewna, ubytkiem masy i gęstości pod wpływem wzrostu temperatury modyfikacji.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2021, 113; 30--35
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Numerical Acoustoelectric Investigation of the New SAW Structure with (RR)-P3HT Polymer in DMMP Detection
Autorzy:
Hejczyk, Tomasz
Wrotniak, Jarosław
Magnuski, Mirosław
Jakubik, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/1953456.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
gas sensor
numerical modelling
SAW gas sensor
Ingebrigtsen’s formula
DMMP
(RR)-P3HT
numerical acoustoelectric analysis
NAA
Opis:
This document presents the results of numerical analyses of the SAW gas sensor in the steady state. The effect of SAW velocity changes depending on how the surface electrical conductivity of the sensing layer is predicted. The conductivity of roughness sensing layer above the piezoelectric waveguide depends on the profile of the diffused gas molecule concentration inside the layer. Numerical results for the gas DMMP (CAS Number 756-79-6) for layer (RR)-P3HT in the steady state are shown. The main aim of the investigations was to study the thin film interaction with target gases in the SAW sensor configuration based on diffusion equation for polymers. Numerical results for profile concentration in steady state are shown. The results of numerical acoustoelectric analysis (NAA) allow to select the sensor design conditions, including the morphology of the sensor layer, its thickness, operating temperature and layer type. The numerical results based on the code written in Python, are described and analyzed. The theoretical results were verified and confirmed experimentally.
Źródło:
Archives of Acoustics; 2021, 46, 2; 313-322
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite Element Analysis of SAW Sensor with ZnO Substrate for Dichloromethane (DCM) Gas Detection
Autorzy:
Moustafa, Mohamed
Laouini, Ghaylen
Alzoubi, Tariq
Powiązania:
https://bibliotekanauki.pl/articles/1945651.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
surface acoustic wave
SAW
gas sensors
VOCs
FEM modelling
Opis:
A SAW gas sensor based on Zinc Oxide (ZnO) piezoelectric substrate is simulated and evaluated for the detection of the dichloromethane (DCM) volatile organic compound (VOC). The study is performed based on the finite element method (FEM) using COMSOL Multiphysics software. The obtained device response using the ZnO substrate is compared to the one using the typical lithium niobate (LiNbO3) piezoelectric substrate. A thin film of polyisobutylene (PIB) membrane is selected to act as the sensing layer. The obtained results reveal a linear behaviour of the resonance frequency downshift (i.e., the sensor sensitivity) versus the investigated gas concentrations varying from 10 ppm to 100 ppm of DCM gas. Additionally, the sensor response is investigated by applying several thicknesses of PIB ranging from 0.3 µm to 1.0 µm. The observed sensor response shows less dependence on the PIB thickness using the ZnO substrate than the LiNbO3 one.
Źródło:
Archives of Acoustics; 2021, 46, 3; 419-426
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Profilometria laserowa w badaniach kamiennych elementów budowlanych poddanych obróbce mechanicznej i termicznej
Application of laser profilometry in the investigation of mechanically and thermally treated stone elements
Autorzy:
Rembiś, Marek
Kośla, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2076217.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
profilometria laserowa
płyty granitowe
płyty bazaltowe
wykończenie piłą
płomieniowane wykończenie
chropowatość powierzchni
falistość powierzchni
laser profilometry
granite slabs
basalt slabs
saw cut finish
flamed finish
surface roughness
surface waviness
Opis:
The investigation was carried out on stone slabs sawn and flamed from three commercial types of igneous rocks: the “Sunny Desert” granite, “Twilight” basalt and “Imperial Red” granite. With the following method of laser profilometry, 510 surface profiles were recorded, each of them containing 1280 measuring points. The parameters of roughness and waviness were calculated for each stone surface with a horizontal measurement accuracy of 1 mmandaverticaloneof10mm. The data of laser profiling were correlated with petrographic observations in order to identify the rock components that are most exposed to damage while preparing the stone slabs. The results indicate that the thermally treated slabs have their surface roughness distinctly higher and their waviness higher even several times than the slabs obtained by sawing. Among the three flamed slabs, the highest roughness is revealed by the medium-crystalline “Sunny Desert” granite, while in case of the cut ones - by the unequally crystalline “‘Imperial Red” granite. The waviness of the surfaces obtained by slab cutting and flaming is comparable in both investigated granite types. The “Twilight” basalt, which shows the porphyritic-aphanitic texture and the directional arrangement of its mineral components, reveals the lowest values of all the parameters analysed.
Źródło:
Przegląd Geologiczny; 2021, 69, 2; 120--126
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SAW Sensor with Langmuir-Blodgett Layer for Detection of Benzene and its Derivatives
Autorzy:
Balcerzak, Andrzej
Kiełczyński, Piotr
Szalewski, Marek
Wieja, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1953516.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
SAW sensor
Langmuir-Blodgett layer
vapors
benzene
benzene derivatives
Opis:
Vapors of benzene and its derivatives are harmful and toxic for human beings and natural environment. Their detection has fundamental importance. For this purpose authors propose surface acoustic wave (SAW) sensor with skeletonized layer deposited by Langmuir-Blodgett (L-B) method. This layer was obtained by depositing a binary equimolar mixture of 5-[[1,3-dioxo-3-[4-(1-oxooctadecyl) phenyl]propyl]amino]-1,3-benzenedicarboxylic acid with cetylamine. The skeletonized sensor layer has been obtained by removing cetylamine. Response of this sensor depends mainly of the electrical dipole momentum of molecule. Among the tested compounds, benzene has a zero dipole moment and gives the smallest sensor response, and nitrobenzene has the largest dipole moment and the sensor reacts most strongly to its vapor.
Źródło:
Archives of Acoustics; 2021, 46, 1; 25-30
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CHANGES IN THE LEVEL OF REGIONAL DEVELOPMENT OF ALBANIA AND VOIVODSHIPS IN POLAND IN 2010-2017
Autorzy:
Kozak, Sylwester
Muça, Etleva
Powiązania:
https://bibliotekanauki.pl/articles/1818404.pdf
Data publikacji:
2020-04-10
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
regional development
MCDA procedure
SAW method
Opis:
The article presents the results of research on changes in the level of regional development in Albania and in all voivodships (regions) in Poland in 2010-2017. Annual data comes from national statistical offices. The level of regional development was determined by the multi-criteria decision analysis method - SAW (the Simple Additive Weighting) and includes two social and six economic criteria. The obtained results indicate that in the whole analyzed period the level of regional development in Albania was lower than in all regions in Poland. However, it achieved the highest increase in the studied group, among others thanks to improving the demographic situation, increasing entrepreneurship and improving the quality of the market. The Mazowieckie, Pomorskie and Wielkopolskie voivodships were characterized by the highest level of development throughout the entire period as a consequence of a good demographic situation, increased entrepreneurship and high GDP dynamics. Negative population growth and an increase in unemployment meant that the Lubelskie and Warmińsko-Mazurskie voivodships are characterized by the lowest level of regional development in Poland. Faster improvement of the situation in more developed regions contributed to the increase of disparity in the socio-economic development of regions in Poland.
Źródło:
Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach; 2019, 50, 123; 37-44
2082-5501
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czas trwania etapów dostawy wielkowymiarowego drewna sosnowego do tartaku
Duration of stages of delivery of large-sized Scots pine wood to the sawmill
Autorzy:
Tymendorf, L.
Trzciński, G.
Powiązania:
https://bibliotekanauki.pl/articles/979337.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
wood supply chain
saw logs transport
duration time
round wood transport stages
Opis:
The efficiency of wood transport depends not only on the maximum load capacity, but also on the duration of individual transport operations. The purpose of the presented research is to analyze the duration of transport stages of Scots pine large−size wood (saw logs) and indicate the factors that affect the structure of the duration of the entire operation. The operation was divided in to truck driving for a load on a public and forest road, driving between loading points in the forest including timber loading, driving with saw logs on a forest and public road, waiting for entry to the sawmill as well as verification and unloading of wood in the sawmill. Data on the duration of each operation was determined on the basis of information obtained from the course information cards. The waiting time for entering the sawmill as well as wood checking and unloading was based on data from wood reception in sawmill. 1514 randomly selected transports in a period of twelve months from 40 forest districts were analyzed. The average time of empty drive for a load by public road was 1:03 [hh:mm], with the range from 0:01 to 7:30. Driving time with a load to the sawmill was an average of 1:23, with the span from 0:05 to the 5:30. Driving on forest roads for load and with load is at a similar level of 11−12 minutes. The average time of loading wood in the forest was 39 minutes, with a minimum of 10 minutes, and maximum of 3 hours. Most trucks entered the plant immediately, nevertheless the average waiting time was 38 minutes, and the majority (75%) of transports need to wait up to one hour. Volume and quality checking, as well as unloading in the plant, took 42 minutes on average. The shortest delivery lasted 1:00 and the longest 17:37. The average transport duration of wood to the sawmill was 4:51. The number of places for loading wood in the forest has significant impact on the duration of collecting the load, and thus also on the time of the entire delivery. The largest fraction in the total duration of transport is associated with traveling on public roads. 27.1 and 28.8% is the time of loaded truck, and 20.5% and 21.7% is the time of the empty ride. A big difference (5%) occurs the time of collecting wood in the forest depending on the number of places from which wood was loaded. This time has a significant share (17.45%) in the structure of the delivery duration. Duration of the individual stages of wood transport in particular months shows little variability.
Źródło:
Sylwan; 2020, 164, 07; 549-559
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł

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