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Tytuł:
Studying glycosaminoglycan derivative/protein interaction - prerequisite for the design of functional biomaterials
Autorzy:
Scharnweber, D.
Rother, S.
Kohler, L.
Hintze, V.
Powiązania:
https://bibliotekanauki.pl/articles/285480.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomaterials
cellular microenvironment
glycosaminoglycans
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 25
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cryptosystem Based on Reversible Two-dimensional Cellular Automata
Autorzy:
Wiśniewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/92870.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
cellular automata
reversibility
cryptosystem
Opis:
Cellular Automata have been successfully applied to several scientific problems such as among others image processing or data encryption. One could find reversibility of dynamics is a fundamental feature of nature. While the most CA are not reversible in nature, one can find some CA with simple behavior could be reversible. Reversible cellular automata (RCA) as efficient encryption and decryption devices was originally conceived by Kari. In this introduction paper, we analyze and develop reversible cellular automata (RCA) based on Kari’s idea and some Clarridge’s concepts.
Źródło:
Studia Informatica : systems and information technology; 2009, 2(13); 97-105
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
RCAFE Based Numerical Model of Dynamic Recrystallization
Autorzy:
Legwand, A.
Sitko, M.
Perzyński, K.
Madej, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/100012.pdf
Data publikacji:
2016
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
cellular automata
RCAFE
recrystallization
Opis:
The main goal of the paper is dedicated to proper arrangement of the Finite Element (FE) and Random Cellular Automata (RCA) methods in order to develop numerical model of dynamic recrystallization (DRX) and therefore to simulate microstructure morphology changes during plastic deformation at elevated temperatures. In the approach, Finite Element solver provides information on equivalent stress and strain fields after subsequent time steps. Then these data are transferred to RCA model, which is responsible for evaluation of corresponding microstructure morphology evolution and dislocation density changes. Finally, information from the CA part is send back to the FE solver as an input for the next time step. As a result, a fully coupled RCAFE model to simulate progress of DRX is established. The present paper is directly focused on development of algorithms and methods to transfer input/output data between both FE and RCA models. The developed communication protocol is based on the Abaqus VUMAT subroutine. Examples of obtained results from the developed model are also presented to highlight its potential.
Źródło:
Journal of Machine Engineering; 2016, 16, 2; 52-60
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of modified Ritchie-Knott-Rice criterion to cellular automata
Autorzy:
Janus-Gałkiewicz, Urszula
Neimitz, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/280710.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
fracture mechanics
cleavage
cellular automata
Opis:
In this paper, the cellular automata model is applied to analyse cleavage and ductile fracture in front of a crack in three-point-bend specimens made of Hardox-400 steel. The research programme was composed of experiments followed by fractographic and numerical analyses. On the basis of microscopic observations, the sizes of cells used in the automata were determined. The algorithm enabled mapping of the two-dimensional crack surface as well as a simulation of temperature-dependent failure mechanisms by defining transition rules based on the modified Ritchie-Knott-Rice cleavage fracture criterion. The critical stress values were estimated and verified by the cellular automata model.
Źródło:
Journal of Theoretical and Applied Mechanics; 2019, 57, 3; 577-590
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The comparison of properties of three-layer cellular material and wood-based panels
Porównanie właściwości trzywarstwowego materiału komórkowego oraz płyt drewnopochodnych
Autorzy:
Iejavs, J.
Spulle, U.
Jakovlevs, V.
Powiązania:
https://bibliotekanauki.pl/articles/52758.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
comparison
wood property
three-layer cellular material
cellular wood material
wood-based panel
Opis:
In recent years a reduced weight cell panel, whose trade mark is Dendrolight, has gained worldwide recognition thanks to the opening of an experimental factory in Austria and the start-up of a new industrial factory in Latvia with manufacturing capacity of 65 thousand m3 cell board material per year. Hitherto the internal layer of cell panel of cellular wood material type has been produced mainly from softwoods like Norway spruce (Picea abies L.) or Scots pine (Pinus sylvestris L.) covered with plywood, solid wood, particleboard or other material. The reduced weight cell panel has many applications in the furniture industry, internal cladding, door production, the transport manufacturing industry, and possibly in the construction panel production. The essential goal of the research was to identify possible applications of aspen (Populus tremula L.) wood, which is a common broad-leaved tree in Latvia, as an alternative material to Norway spruce in the production of reduced weight cell panel. The aim of the initial research was to investigate some physical and mechanical properties of aspen cell panel covered with aspen and plywood as well as to compare these physical and mechanical properties with the properties of wood-based panels. The following raw materials were used: finger jointed aspen for internal layer; finger jointed aspen and three-layer birch plywood for external layer; polyurethane and polyvinylacetate adhesives for internal and external layer gluing. Tests of obtained aspen panel were carried out in accordance with current test standards for testing of panel and timber properties. The following panel parameters were determined: moisture content, density, swelling in thickness after 24-hour immersion in water, tensile strength, three-point bending strength and modulus of elasticity, and four-point bending strength. A relevant conclusion: panels of cellular wood material type produced from aspen wood have similar physical and mechanical properties to such cell panels produced from spruce wood.
Płyty komórkowe o obniżonej gęstości mają szerokie zastosowanie w przemyśle meblarskim, wyposażeniu wnętrz, produkcji drzwi, środkach transportu. Mogą być również stosowane w wytwarzaniu płyt konstrukcyjnych. Założeniem badań było określenie przydatności drewna topoli (Populus tremula), rozpowszechnionego na Łotwie, jako substytutu drewna świerku, w produkcji płyt o obniżonej gęstości. W badaniach wykorzystano: drewno topoli na warstwę środkową, trzywarstwową sklejkę brzozową na warstwy zewnętrzne oraz kleje poliuretanowe i polioctanowinylowe. Zbadano następujące parametry wytworzonych płyt: gęstość, wilgotność, spęcznienie, wytrzymałość na rozciąganie, wytrzymałość na zginanie i moduł sprężystości. W podsumowaniu stwierdzono, iż płyty komórkowe wytworzone z drewna topoli charakteryzują się podobnymi właściwościami fizycznymi i mechanicznymi jak płyty komórkowe wytworzone z drewna świerku.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2011, 54, 185
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study of bending stiffness of sandwich plates with cellular cores
Studium porównawcze sztywności giętnej płyty sandwichowej z wypełnieniem materiałem komórkowym o strukturze honeycomb oraz z wypełnieniem auksetycznym
Autorzy:
Janus-Michalska, M.
Jasińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/195208.pdf
Data publikacji:
2017
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
sandwich plates
auxetic cellular material
cellular core
płyty sandwichowe
auksetyczne materiały komórkowe
wypełnienie komórkowe
Opis:
This paper presents numerical simulation of a sandwich plate bending. Two types of plates are considered: with a cellular honeycomb core and with the cellular auxetic core. Finite element method (FEM) calculations are performed by means of ABAQUS system for determination of plates bending stiffness. Three methods are presented. The first one, numerically expensive, is based on detailed modelling of cellular core structure, the second applies laminated plate theory with an equivalent core stiffness, the third applies theory of composite beams. The results show limitations of applicability of abovementioned models to stiffness modelling. The influence of core lattice geometry parameters on plate stiffness is studied.
W artykule przedstawiono numeryczne symulacje testów zginania płyt sandwichowych wypełnionych materiałami komórkowymi o strukturze plastra miodu oraz strukturze auksetycznej. Celem wyznaczenia sztywności giętnej płyt wykonano obliczenia numeryczne w systemie ABAQUS metodą elementów skończonych. Prezentowane są dwie metody. Pierwsza kosztowna numerycznie polega na szczegółowym modelowaniu struktury komórkowej, druga stosuje teorię laminatów, trzecia teorię belek zespolonych. Wyniki wskazują na możliwość modelowania sztywności giętnej płyty. Przeanalizowano wpływ parametrów geometrycznych, a w szczególności auksetyczności struktury.
Źródło:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2017, z. 89 [295], 2; 63-70
0209-2689
2300-5211
Pojawia się w:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of the electrophoresis of DNA by the method of cellular automata
Autorzy:
Krawczyk, Małgorzata
Kułakowski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/747601.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Biochemistry, molecular biology
Cellular automata
Opis:
.
The authors give the description of a new cellular automaton for simulating the electrophoresis of gel DNA. This automaton is deterministic, which corresponds to the well-known Monte Carlo rules holding for the electrophoresis at a low temperature and a high intensity electric field. The experimental results indicate that under such conditions the electrophoresis efficiency depends significantly on the string length.
Źródło:
Mathematica Applicanda; 2002, 30, 44/03
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie automatów komórkowych w modelowaniu ruchu drogowego
Use of cellular automata for traffic analysis
Autorzy:
Małecki, K.
Rokita, M.
Wątróbski, J.
Powiązania:
https://bibliotekanauki.pl/articles/154665.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
automaty komórkowe
symulacja
cellular automata
simulation
Opis:
Uniwersalność automatów komórkowych spowodowała, iż znajdują zastosowanie w wielu dziedzinach, np. w modelowaniu i symulacji ruchu drogowego. Autorzy prezentują dokonania w tym zakresie (tab. 1) oraz formułują nowy model, będący rozwinięciem modelu skrzyżowania dróg prezentowanego w [1] i [8]. Dodatkowo autorzy przedstawiają charakterystykę opracowanego, nowatorskiego systemu, umożliwiającego modelowanie dowolnego obszaru (zespół skrzyżowań i dróg) oraz symulowanie ruchu w ujęciu mikroskopowym.
Cellular automata are considered by some researchers to belong to one of the IT department, which is an artificial intelligence. Even though their history goes back to the forties of the last century, much attention is still paid to the use of cellular automata for the process of testing and simulation of different phenomena. The universality of cellular automata caused their application to many areas such as: physics, computer graphics and traffic modeling. The authors present the achievements in this field (Table 1) and formulate a new traffic model which is a development of the crossroads model defined by Chowdhury-Schadschneider [1] and later by Bartodziej [8]. This new model helps to simulate traffic at the crossroads of two-lane and two-way roads. In addition, there is given the worked out system characteristics which enables modeling any area (intersections and roads) and carrying out the traffic simulations in a microscopic approach. The software consists of two applications: TrafficCA (traffic simulator based on cellular automata) and the map editor (this application enables generating any area including roads, traffic lights and the surroundings). Taking into account the fact that the simulated cases are always correct (carried out in accordance with properly defined models of cellular automata), the developed system, except for the traffic modeling, can be used for showing driver behaviour unfavourable for traffic capacity.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 7, 7; 724-727
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of a porous-cellular cylindrical shell subjected to combined loads
Autorzy:
Belica, T.
Magnucki, K.
Powiązania:
https://bibliotekanauki.pl/articles/280196.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
stability
cylindrical shell
porous-cellular material
Opis:
The subject of the paper is a metal foam circular cylindrical shell subjected to combined loads. Combinations of the external pressure and axial load are taken into account. The shell is simply supported on all outer edges. The mechanical properties of the metal foam vary continuously in the thickness direction. A non-linear hypothesis of deformation of a plane cross section of the shell is formulated. The field of displacements of any cross section and non-linear geometric relationships are assumed. The system of partial differential equations for the shell is derived on the basis of the principle of stationarity of the total potential energy. This system is approximately solved by the Bubnov-Galerkin method. The critical loads for shells are numerically determined. Results of the calculation are shown in figures.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 4; 927-936
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Glycosylation of immune system proteins and its role in autoimmune diseases and cancer
Autorzy:
Trzyna, Anna
Tabarkiewicz, Jacek
Mazur, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1597351.pdf
Data publikacji:
2020-03-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
Glycosylation
Immunity
Cellular
Humoral
Autoimmune Diseases
Opis:
Introduction. Structural glycans have great biological significance and are involved in signaling and cell communication of the immune system. They are attached to proteins and lipids in an enzymatic process called glycosylation where glycosyltransferase and glycosidases bind sugar residues and lead to the formation of bioconjugates. Aim. In this paper we describe the importance of glycosylation in the immune system and its changes in diseases. Material and methods. This review was performed according to systematic literature search of major bibliographic databases. Results. Proper glycosylation ensures the functioning of the organism, however, defects in structural glycans of immune system changes their properties and can lead to disorders and further to autoimmune diseases. It has been also proven that glycosylation of autoimmune system is changed during cancer. In this paper we described types of structural glycans, significance of glycosylation of selected components of the immune system and its modifications in disorders. Conclusions. Knowledge about changes in the glycosylation in diseases is the key to understanding the processes of autoimmune diseases and may allow the development of new treatments in the future.
Źródło:
European Journal of Clinical and Experimental Medicine; 2020, 1; 32-37
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On mapping onto self-organized criticality
Autorzy:
Wiśniewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/93038.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
cellular automata
self-organizing system
criticality
Opis:
In the report we have discussed a few aspects of SOC concept which in general have strongly influence on explicitness of mapping process. SOC idea is based on group of models and/does not seem to give quite clear instructions whether mapped phenomena exhibit SOC or not. To present the problem we have performed a computer simulation in order to investigate the effect of the critical point within the system evolution process without conservation. We have considered that on two-dimensional cellular automata whose rule consists of one or two subrules. The first one, based on Conway’s model (or very similar to), has represented the local behavior of transmission processes and has been applied in the experiment synchronously, as a fundamental mode. The second one, called a transport rule, has been applied sequentially. That subrule has described the motion of a fraction of individuals. As a result of comparing models of the various sets of rules for the applied size of lattice, we could find that the modified Conway’s model would be merely treated as subcritical.
Źródło:
Studia Informatica : systems and information technology; 2006, 1(7); 207-216
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Immunosuppressive influence of Anguillid herpesvirus-1 (AngHV-1) infection on cellular defense mechanisms in European eel (Anguilla anguilla)
Autorzy:
Schulz, P.
Deperasińska, I.
Kaczorek-Łukowska, E.
Siwicki, A.K.
Powiązania:
https://bibliotekanauki.pl/articles/2087405.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alloherpesviruses
cellular immunity
immunosuppression
innate immunity
Źródło:
Polish Journal of Veterinary Sciences; 2019, 4; 785-787
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cellular automata: structures and some applications
Automaty komórkowe: struktura i pewne zastosowania
Autorzy:
Burzyński, M.
Cudny, W.
Kosiński, W.
Powiązania:
https://bibliotekanauki.pl/articles/282005.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
cellular automata
traffic flow
fuzzy rules
Opis:
A new approach to the modelling of various nature phenomena such as predator and prey ecological system, heat transport, spreading of oil slick and traffic flow is introduced. Cellular automata (CA) are discrete dynamical systems whose behaviour is completely specified in terms of simple local relations. They are mathematical models of spatialy distributed processes; however they can lead to an appropriate simulation of comlex dynamic processes. Applications to heat transfer and problems of environmental simulations are done. A discrete automaton model with fuzzy rules to simulate one-way traffic flow is also described. Results of simulations are consistent with phenomena observed in reality. It gives a base to propose the cellular automata tool as an option in modelling and solving problems of complex (and some times, not completely known) nature.
W pracy zaprezentowano metodę modelowania układów i zjawisk obserwowanych w przyrodzie, takich jak dynamika systemu ekologicznego drapieżnik-ofiara, przewodzenie ciepła, rozprzestrzenianie się plamy ropy naftowej po wycieku na wodzie czy ruch strumienia pojazdów na drodze miejskiej. Metodę oparto na tzw. automatach komórkowych, które są układami dyskretnymi o zachowaniach ściśle zdeterminowanych prostymi relacjami o charakterze lokalnym. Automaty komórkowe to matematyczne modele procesów przestrzennych, mogące z powodzeniem opisywać złożone zjawiska dynamiczne. W pracy przedstawiono aplikację do zagadnienia przewodzenia ciepła oraz kilku symulacji środowiskowych. Przedstawiono także model automatowy z regułami rozmytymi opisujący jednokierunkowy ruch pojazdów na drodze. Wyniki symulacji okazały się zgodne z obserwacjami rzeczywistych układów. Zachęcające rezultaty badań skłaniają do postrzegania automatów komórkowych jako efektywnej opcji w modelowaniu i rozwiązywaniu problemów o złożonej (czasem nie całkiem rozpoznanej) naturze.
Źródło:
Journal of Theoretical and Applied Mechanics; 2004, 42, 3; 461-482
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The importance of the nuclear and cytoplasmic signalling in the cellular response to ionizing radiation
Autorzy:
Szumiel, I.
Powiązania:
https://bibliotekanauki.pl/articles/146716.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cellular signalling pathways
ionizing radiation
radiation sensitivity
Opis:
DNA is the universal primary target for ionizing radiation; however, the cellular response is highly diversified not only by differential DNA repair ability. The monitoring system for the ionizing radiation-inflicted DNA damage consists of 3 apparently independently acting enzymes which are activated by DNA breaks: two protein kinases, Atm (ataxia telangiectasia mutated) and DNA-PK (DNA-dependent protein kinase) and a poly(ADP-ribose) polymerase, PARP-1. These 3 enzymes are the source of alarm signals, which affect to various extents DNA repair, progression through the cell cycle and eventually the pathway to cell death. Their functions probably are partly over-lapping. On the side of DNA repair their role consists in recruiting and/or activating the repair enzymes, as well as preventing illegitimate recombination of the damaged sites. A large part of the nuclear signalling pathway, including the integrating role of Tp53 has been revealed. Two main signalling pathways start at the plasma membrane: the MAPK/ERK (mitogen and extracellular signal regulated protein kinase family) "survival pathway" and the SAPK/JNK (stress-activated protein kinase/c-Jun N-terminal kinase) "cell death pathway". The balance between them is likely to determine the cell’s fate. When DNA break rejoining is impaired, the cell is unconditionally radiation sensitive. The fate of a repair-competent cell is determined by the time factor: the cell cycle arrest should be long enough to ensure the completion of repair. Incomplete repair or misrepair may be tolerated, when generation of the death signal is prevented. So, the character and timing of the signals are, to a large part, responsible for the cellular intrinsic radiation sensitivity and depend on the characteristics of the cellular signalling web.
Źródło:
Nukleonika; 2000, 45, 4; 215-220
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic stability of a metal foam circular plate
Stateczność dynamiczna płyty kołowej wykonanej z piany metalowej
Autorzy:
Magnucka-Blandzi, E.
Powiązania:
https://bibliotekanauki.pl/articles/281745.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
circular plate
dynamic stability
porous-cellular metal
Opis:
The study is devoted to a radial compressed metal foam circular plate. Properties of the plate vary across its thickness. The middle plane of the plate is its symmetry plane. First of all, a displacement field of any cross-section of the plate was defined. Afterwards, the components of strain and stress states were found. The Hamilton principle allowed one to formulate a system of differential equations of dynamic stability of the plate. This basic system of equations was approximately solved. The forms of unknown functions were assumed and the system of equations was reduced to a single ordinary differential equation of motion. The equation was then numerically processed that allowed one to determine critical loads for a family of metal foam plates. The results of studies are shown in figures. They show the effect of porosity of the plate on the critical loads. The results obtained for porous plates were compared to homogeneous circular plates.
Przedmiotem badań jest osiowo ściskana porowata płyta kołowa.Własności płyty są zmienne na jej grubości. Środkowa płaszczyzna płyty jest jej płaszczyzną symetrii. Zdefiniowano pole przemieszczeń dla dowolnego przekroju płyty. Ponadto wyznaczone są składowe stanów odkształceń i naprężeń. Układ równań stateczności dynamicznej płyty wyznaczono z zasady Hamiltona. Następnie równania te rozwiązano metodą Galerkina i otrzymano zwyczajne równanie różniczkowe typu Mathieu. Równanie to rozwiązano metodą Rungego-Kutty i wyznaczono obciążenia krytyczne dla rodziny płyt kołowych. Wyniki przedstawiono na wykresach. Wskazano wpływ porowatości materiału na obciążenia krytyczne płyty. Otrzymane wyniki porównano z odpowiednimi wielkościami dla płyty jednorodnej.
Źródło:
Journal of Theoretical and Applied Mechanics; 2009, 47, 2; 421-433
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of water flows on ship traffic in narrow water channels based on cellular automata
Autorzy:
Hu, H.
Chen, X.
Sun, Z.
Powiązania:
https://bibliotekanauki.pl/articles/260068.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
narrow channel
cellular automata
simulation
ship interaction
Opis:
In narrow water channels, ship traffic may be affected by water flows and ship interactions. Studying their effects can help maritime authorities to establish appropriate management strategies. In this study, a two-lane cellular automation model is proposed. Further, the behavior of ship traffic is analyzed by setting different water flow velocities and considering ship interactions. Numerical experiment results show that the ship traffic density-flux relation is significantly different from the results obtained by classical models. Furthermore, due to ship interactions, the ship lane-change rate is influenced by the water flow to a certain degree.
Źródło:
Polish Maritime Research; 2017, S 3; 130-135
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Immunohistochemical evaluation of the influence of L-arginine on biomarkers of environmental (cellular) stress in the kidneys of pregnant female rats
Autorzy:
Pedrycz, Agnieszka
Siermontowski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/989964.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
nitric oxide
cellular stress
kidneys
pregnancy
immunohistochemistry
Opis:
Introduction. Kidney damage during pregnancy constitutes a diagnostic and therapeutic challenge. However, it is not entirely known whether a kidney condition recognised before the pregnancy releases an organism’s response to pregnancy, or whether pregnancy itself worsens kidney function. Objective. The aim of the study was immunohistochemical evaluation of cells of kidneys of pregnant rats under the influence of nitric oxide (NO), with measurement of the immunoexpression of cellular stress markers (p-53, HSP 70). The dose of administered L-arginine (NO substrate) was approximated to that applied in obstetrics in gestosis prevention and treatment in pregnant women. Materials and method. 60 female rats used in experiment were divided into 6 groups: 3 experimental and 3 control. The females from experimental groups were administered L-arginine (40g/kg, per os) every other day starting from the seventh day or pregnancy. The animals were decapitated on the 10th, 20th day of pregnancy, and 10 days after the delivery. Kidneys taken from decapitated rats were evaluated using the immunohistochemical three step method. HSP 70 and p-53 proteins were detected. Conclusions. L-arginine increased the expression of p-53 protein – on the 10th day of pregnancy, which increased at the end of pregnancy; however, 10 days after delivery the level dropped below that observable during physiological pregnancy. Hormonal changes in physiological pregnancy cause an increase in expression of the p-53 (cell stress marker) in the epithelial cells of renal tubules, mainly at the end of pregnancy (20th day). 10 days after the delivery, this expression decreases. The expression of HSP-70 protein increases already on the 10th day of pregnancy and maintains a similar level throughout the pregnancy, but is reduced after the puerperium.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of CDMA systems
Autorzy:
Gajewski, P.
Krygier, J.
Powiązania:
https://bibliotekanauki.pl/articles/308360.pdf
Data publikacji:
2001
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
OPNET
DS-CDMA
cellular systems
network simulation
Opis:
This paper describes a model of a system with wideband CDMA that is a proposal of user access for future UMTS. This model has been implemented using OPNET tool. The model enables network architecture, radio interface, mobile station motion, call generation, signalling, etc. The examples of simulation results of call and handover blocking probability are also presented in this paper.
Źródło:
Journal of Telecommunications and Information Technology; 2001, 2; 35-40
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Waterlogging tolerance: A review on regulative morpho-physiological homeostasis of crop plants
Autorzy:
Sharma, Shubhangani
Sharma, Jyotshana
Soni, Vineet
Kalaji, Hazem M.
Elsheery, Nabil I.
Powiązania:
https://bibliotekanauki.pl/articles/1844317.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
antioxidants
cellular metabolites
climate change
photosynthesis
waterlogging
Opis:
The natural environment is being drastically affected by climate change. Under these severe environmental conditions, the growth and productivity of agricultural crops have reduced. Due to unpredictable rainfall, crops growing in the field are often exposed to waterlogging. This leads to significant crop damage and production losses. In this review paper, the morphological and physiological adaptations such as development of aerenchyma, adventitious roots, radial root oxygen loss barrier, and changes in chlorophyll fluorescence parameters of crops under waterlogging are discussed. This will help to understand the effects of waterlogging on various crops and their adaptation that promotes crop growth and productivity. To meet the food requirements of a growing population, the development of waterlogging tolerant crops by screening and plant breeding methods is necessary for plant breeders. Better knowledge of physiological mechanisms in response to waterlogging will facilitate the development of techniques and methods to improve tolerance in crops.
Źródło:
Journal of Water and Land Development; 2021, 49; 16-28
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using shared memory as a cache in cellular automata water flow simulations on GPUs
Autorzy:
Topa, P.
Młocek, P.
Powiązania:
https://bibliotekanauki.pl/articles/305529.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
cellular automata
GPU computation
modelling physical phenomena
Opis:
Graphics processors (GPU – Graphic Processor Units) recently have gained a lot of interest as an efficient platform for general-purpose computation. Cellular Automata approach which is inherently parallel gives the opportunity to implement high performance simulations. This paper presents how shared memory in GPU can be used to improve performance for Cellular Automata models. In our previous works, we proposed algorithms for Cellular Automata model that use only a GPU global memory. Using a profiling tool, we found bottlenecks in our approach. With this paper, we will introduce modifications that takes an advantage of fast shared memory. The modified algorithm is presented in details, and the results of profiling and performance test are demonstrated. Our unique achievement is comparing the efficiency of the same algorithm working with a global and shared memory.
Źródło:
Computer Science; 2013, 14 (3); 385-401
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical Phenomena : Towards Modeling with Cellular Automata
Autorzy:
Wiśniewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/92942.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
phase transitions
cellular automata
self-organized criticality
Opis:
The paper presents basic description methods of critical phenomena, i.e. first-order, continuous phase transitions, and an overview of the self-organized criticality concept. In this approach an attempt is made to identify the determinant factors of modeling critical events using cellular automata.
Źródło:
Studia Informatica : systems and information technology; 2007, 2(9); 69-76
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Complex Computer System Based on Cellular Automata Method Designed to Support Modelling of Laminar Cooling Processes
Autorzy:
Gołąb, R.
Madej, Ł.
Pietrzyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/100057.pdf
Data publikacji:
2014
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
cellular automata
finite element method
cooling process
Opis:
The user friendly computer system that have the capability of modelling material behaviour both at the macro and micro scales was developed in this work. The system was designed to predict microstructure evolution during phase transformation in laminar cooling conditions with the use of the multi scale cellular automata finite element (CAFE) model. The finite element (FE) part is based on the conventional Fourier type equation and is used to predict macroscopic temperature distribution. This is an input for the micro scale cellular automata (CA) model of austenite-ferrite phase transformation. To facilitate the research, proposed micro scale CA model was implemented within developed universal object-oriented programming framework CAF. Description of major assumptions and functionality of the developed numerical system including efficient Graphical User Interface (GUI) is presented in the paper. The intuitive visualization of data obtained in different length scales facilitates work with the software.
Źródło:
Journal of Machine Engineering; 2014, 14, 1; 63-73
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of changes of the Warsaw urban area 1969-2023 (application of cellular automata)
Autorzy:
Werner, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2032490.pdf
Data publikacji:
2006-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
cellular automata
GIS
spatio-temporal processes
urbanization
Opis:
It is possible to make analyses within the field of GIS applying cellular automata. One of the purposes of socio-economic geography is indirect understanding of the phenomenon by analyzing spatial patterns and inferring spatio-temporal processes looking rather for local hotspots. The cellular automata are the tool both for spatio-temporal inferring based on local conditions and data visualization. The evidence is the case study of spatial simulation of Warsaw Urban Area (Poland). The author verifies the hypothesis that the present layout and extent of the Warsaw agglomeration determines further directions of the city's spatial development. To this end, he employs a method based on cellular automata theory.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2006, 12; 329-335
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Connexin-dependent intercellular stress signaling in tissue homeostasis and tumor development
Autorzy:
Czyż, Jarosław
Piwowarczyk, Katarzyna
Paw, Milena
Luty, Marcin
Wróbel, Tomasz
Catapano, Jessica
Madeja, Zbigniew
Ryszawy, Damian
Powiązania:
https://bibliotekanauki.pl/articles/1038572.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
carcinogenesis
connexin
gap junctions
cellular stress
tumor
Opis:
Cellular stress responses determine tissue development, homeostasis and pathogenesis. Paracrine signaling, exchange of mechanical stimuli and intercellular transfer of small metabolites via connexin-built gap junctional channels are involved in the cellular stress detection and propagation of stress stimuli in multicellular networks. Cellular stress responses are also regulated through the activity of unpaired connexons (hemichannels) and via the intracellular interference of connexins with the cell cycle and pro-apoptotic machinery. Therefore, connexins are considered as multidirectional transmitters of the "outside-in" and "inside-out" stress signaling that are crucial for tissue homeostasis, regeneration and pathology. In particular, the disturbance of connexin function during the multi-stage process of tumor development leads to abnormal reactions of tumor cells to stress stimuli. In this review, we outline the current knowledge on the multidirectional role of connexins in the detection of stress signals. We also discuss the role of connexin-mediated intercellular transmittance of stress signals in tumour promotion, progression and metastatic cascade. Highlights: 1. Connexins and gap junctions protect cells from the microenvironmental stress and are involved in propagation and intracellular processing of stress signals. 2. The quality and quantity of stress stimuli, which may lead to cell adaptation or death by apoptosis, is determined by intrinsic properties of connexins and the cell phenotype. 3. Connexin deficiency increases the resistance of tumor cells to the "outside-in" stress signaling. 4. The connexin-mediated "inside-out" stress signaling participates in tumor cell invasion during the metastatic cascade.
Źródło:
Acta Biochimica Polonica; 2017, 64, 3; 377-389
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fibronectin fragments in human seminal plasma.
Autorzy:
Kątnik-Prastowska, Iwona
Przybysz, Magdalena
Chełmońska-Soyta, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1041450.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cellular domain of fibronectin
seminal plasma
fibronectin
Opis:
The study has revealed the presence of fibronectin (FN) fragments and a lack of intact FN in 72 seminal plasma samples. The FN fragmentation was examined by immunoblotting with a monoclonal antibody specific to the central cellular FN domain and was confirmed with a monoclonal antibody directed to the C-terminal domain of FN. Nine FN fragments between 60 and 200 kDa and five fragments of 60-150 kDa were identified in seminal plasma samples of normozoospermic and of terato-, oligoterato-, and oligoasthenoterato-spermic groups, respectively. The relative amounts of the 60, 90 and 100 kDa FN fragments were 2-3 times higher in seminal plasmas with abnormal semen characteristics than in the normozoospermic group. The results suggest that seminal plasma FN fragments may contribute to fertilization and the analysis of FN fragmentation may have a diagnostic value in andrological investigations.
Źródło:
Acta Biochimica Polonica; 2005, 52, 2; 557-560
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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