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Wyświetlanie 1-15 z 28
Tytuł:
Vaterite CaCO3-coated polymeric fibrous scaffolds for biomedical applications
Autorzy:
Saveleva, M.
Ivanov, A.
Douglas, T. E. L.
Goring, D.
Skirtach, A.
Parakhonskiy, B.
Powiązania:
https://bibliotekanauki.pl/articles/285236.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
scaffolds
polymers
biomedical applications
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 76
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The choice of mechanised means and economic aspects of growing cultivated cranberries
Autorzy:
Ivanov, S.
Viesturs, D.
Bergs, J.
Powiązania:
https://bibliotekanauki.pl/articles/337263.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
borówka
uprawa ekologiczna
mechanizacja
koszty
cranberry
ecological technology
mechanisation
costs
Opis:
The report presents a review of the cranberry growing ecological technologies applied in Latvia depending on the amount of production and its provision with adequate means of mechanisation. The costs are analysed for laying out plantations, the production of the products and the technical means for harvesting, as well as their payback at various volumes of output.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2007, 52, 3; 67-69
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-Similar Solidification of Binary Alloys
Autorzy:
Alexandrov, D.
Ivanov, A.
Malygin, A.
Powiązania:
https://bibliotekanauki.pl/articles/1808056.pdf
Data publikacji:
2009-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.05.+e
81.30.Fb
Opis:
The self-similar crystallization process of a binary mixture from a cooled boundary is studied on the basis of two models with a planar front and mushy layer. Approximate analytical solutions of the process describing the solidification with a mushy layer are found. The theory under consideration is in good agreement with experiments carried out by Huppert and Worster for ice growing from aqueous salt solutions.
Źródło:
Acta Physica Polonica A; 2009, 115, 4; 795-799
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recovery tread wheel pairs of machining
Odzyskiwanie profilu powierzchni tocznych zestawów kołowych przy obróbce mechanicznej
Восстановление профиля катания колесных пармеханической обработкой
Autorzy:
Ivanov, I.
Tarapanov, A.
Kononov, D.
Vorobev, A.
Powiązania:
https://bibliotekanauki.pl/articles/374517.pdf
Data publikacji:
2013
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
recovery of wheel pairs
turning
milling
grinding
odzyskiwanie zestawów kołowych
toczenie
frezowanie
szlifowanie
Opis:
The basic methods of resurfacing wheels are determined and analised. It’s shown that for raising resource of used wheels and decreasing requirements of railway transport for new wheels it’s reasonable to use methods of recovering not only geometric parameters of rim, but also its mechanical properties. It’s marked that use of infeed profile high-speed grinding (VPVSh) enables to intensify significantly process of mechanical treatment of wheel rim profile both when its resurfacing in service and when manufacturing new wheel.
Проанализированы основные методы восстановления колес. Показано, что для повышения ресурса использования колес и уменьшения потребностей железнодорожного транспорта в новых колесах разумно использовать методы восстановления не только геометрических параметров обода, но и его механических свойств. Отмечено, что использование врезного профильного высокоскоростного шлифования позволяет значительно улучшить процесс механической обработки профиля поверхности катания колеса при его эксплуатации и при изготовлении.
Źródło:
Transport Problems; 2013, 8, 1; 105-112
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photoproduction of organic peroxides on the donor side of photosystem II after destruction of the water-oxidizing complex
Autorzy:
Khorobrykh, A.
Khorobrykh, S.
Yanykin, D.
Ivanov, B.
Klimov, V.
Mano, J.
Powiązania:
https://bibliotekanauki.pl/articles/79884.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
manganese
photosystem II
water oxidizing complex
photooxidation
organic molecule
fluorescence probe
photoinhibition
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Patient-specific hemodynamics and stress-strain state of cerebral aneurysms
Autorzy:
Ivanov, D.
Dol, A.
Polienko, A.
Powiązania:
https://bibliotekanauki.pl/articles/306900.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
materiał hipersprężysty
symulacja numeryczna
naprężenie efektywne
przepływ krwi
tętniak
hyperelastic material
numerical simulation
effective stress
blood flow
cerebral aneurysm
Opis:
Purpose: Approximately 5% of the adult population has one or more cerebral aneurysm. Aneurysms are one of the most dangerous cerebral vascular pathologies. Aneurysm rupture leads to a subarachnoid hemorrhage with a very high mortality rate of 45–50%. Despite the high importance of this disease there are no criteria for assessing the probability of aneurysm rupture. Moreover, mechanisms of aneurysm development and rupture are not fully understood until now. Methods: Biomechanical and numerical computer simulations allow us to estimate the behavior of vessels in normal state and under pathological conditions as well as to make a prediction of their postoperative state. Biomechanical studies may help clinicians to find and investigate mechanical factors which are responsible for the initiation, growth and rupture of the cerebral aneurysms. Results: In this work, biomechanical and numerical modeling of healthy and pathological cerebral arteries was conducted. Patient-specific models of the basilar and posterior cerebral arteries and patient-specific boundary conditions at the inlet were used in numerical simulations. A comparative analysis of the three vascular wall models (rigid, perfectly elastic, hyperelastic) was performed. Blood flow and stress-strain state of the two posterior cerebral artery aneurysm models was compared. Conclusions: Numerical simulations revealed that hyperelastic material most adequately and realistically describes the behavior of the cerebral vascular walls. The size and shape of the aneurysm have a significant impact on the blood flow through the affected vessel and on the effective stress distribution in the aneurysm dome. It was shown that large aneurysm is more likely to rupture than small aneurysm.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 2; 9-17
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Absorption in Periodic InN:In Structures
Autorzy:
Plotnikov, D. S.
Shubina, T. V.
Jmerik, V. N.
Semenov, A. N.
Ivanov, S. V.
Powiązania:
https://bibliotekanauki.pl/articles/2047375.pdf
Data publikacji:
2007-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.66.-w
71.45.Gm
Opis:
Optical absorption measurements were exploited to study periodic InN:In structures grown by plasma-assisted molecular beam epitaxy with the thickness of the metallic inclusions varied from 2 to 48 monolayers. We demonstrate that the observed higher-energy shift of an effective absorption edge may be due to In depletion of the InN matrix via the coalescence of In into large clusters, accompanied by the respective higher-energy shift of the Mie resonance. The relevant uncertainty in the optical gap of InN is discussed.
Źródło:
Acta Physica Polonica A; 2007, 112, 2; 191-196
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of human circle of Willis with and without aneurisms
Autorzy:
Ivanov, D.
Dol, A.
Pavlova, O.
Aristambekova, A.
Powiązania:
https://bibliotekanauki.pl/articles/307003.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
3D design
aneurysm
circle of Willis
hyperelastic material
mathematical modelling
mechanical tests
3D
model matematyczny
materiał hiperelastyczny
Opis:
Purpose: This paper includes results of the first stage of research aimed at the development of recommendations for physicians in order to help them to choose a particular type of cerebral arteries aneurysms treatment. Methods: Recent studies show that the majority of aneurysms develop as a result of hemodynamic and degenerative lesions of the vascular wall. Obviously, such wall damage can be studied using the methods of continuum mechanics and numerical simulations. Biomechanical modelling allows us to study hemodynamic parameters and stress-strain state of these arteries in health and disease, and to formulate practical recommendations for the necessity and reasonable selection of a particular type of cerebral arteries aneurysm treatment. Results: At this stage the realistic geometric models of arterial circle of Willis were built for its normal state and in the presence of aneurysms. The ultrasound analysis of circle of Willis was conducted in order to obtain blood flow parameters and the boundary conditions for carotid and vertebral arteries. Also, the mechanical properties of these arteries were investigated and constants of the Mooney–Rivlin strain energy function were obtained. Conclusions: Thus, the boundary problem describing the behaviour of human Willis circle arteries was stated. Further, this problem will be solved numerically using the finite element method. The numerical results will be analyzed from the point of view of the influence of the mechanical factors on the emergence, growth and rupture of circle of Willis aneurysms.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 2; 121-129
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microwave-Induced Delocalization of Excitons in Ternary Compounds of II-VI and III-V Semiconductors
Autorzy:
Ivanov, V. Yu.
Godlewski, M.
Khachapuridze, A.
Yatsunenko, S.
Wojtowicz, T.
Karczewski, G.
Bergman, J. P.
Monemar, B.
Shamirzaev, T.
Zhuravlev, K.
Leonardi, K.
Hommel, D.
Powiązania:
https://bibliotekanauki.pl/articles/2035757.pdf
Data publikacji:
2003-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.35.Ji
72.25.Rb
76.70.Hb
78.55.Et
Opis:
In this work we employ technique of optically detected cyclotron resonance for evaluation of the role of localization processes in CdTe/CdMnTe and CdMnTe/CdMgTe quantum well structures. From microwave-induced changes of excitonic emissions we evaluate magnitude of potential fluctuations (Stokes shift), correlate optically detected cyclotron resonance results with the results of time-resolved experiments and discuss nature of recombination processes in the limit of a strong localization.
Źródło:
Acta Physica Polonica A; 2003, 103, 6; 559-566
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Activation of Al/MoO3 Thermite as a Component of Energetic Condensed Systems to Increase Its Effciency
Autorzy:
Meerov, D.
Ivanov, D.
Monogarov, K.
Muravyev, N.
Pivkina, A.
Frolov, Y.
Powiązania:
https://bibliotekanauki.pl/articles/358816.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
thermites
burning rate
nano-MoO3
Opis:
In the present work a stoichiometric energetic compositions Al+MoO3 prepared by dry mixing and by reactive milling of micro-scale particles were investigated. Morphology, particle size and surface structure of produced powders were examined using scanning electron microscopy, atomic-force microscopy, laser diffractometry and BET analysis. DSC/TG data were processed to obtain kinetic mechanism of the reaction between Al and MoO3. The combustion rate of Al+MoO3 thermite mixture increases with pressure, reaching a maximum at ~10 atm, and then decreases with further pressure increase. The rise of combustion rate at the low range of pressure is associated with the rise in the extent of the vapour phase penetrating the pores of the pressed sample as the ambient pressure increases. However, at a higher pressure the gas formation is suppressed, and the melt formed in the combustion process can selectively wet the pores resulting in inhibition of reaction. Burning rates of mechanical activated system Al+MoO3 are two times higher then not-activated system at ambient pressure ~10 atm and 8 times higher at ~40 atm. In additional experiments, nano-scale MoO3 powder was prepared by evaporation with a subsequent condensation onto cooled plate in an inert-gas fow. Scanning electron microscopy showed that nano-MoO3 particles are absolutely spherical with mean diameter ~100 nm, and atomic-force microscopy 278 D. Meerov et al. reveals smaller particles with mean diameter ~5-30 nm. DSC/TG data showed that the nano-MoO3 starts to sublime earlier than micro MoO3. The use of nano-sized components could considerably increase the burning rates of energetic condensed systems, because of its large specifc surface, lower temperature of sublimation, and high reaction ability.
Źródło:
Central European Journal of Energetic Materials; 2009, 6, 3-4; 277-289
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical description of technological process for primary fish processing
Matematyczny opis procesu technologicznego obróbki wstępnej ryb
Autorzy:
Fatychov, J.
Evtropkov, V.
Ivanov, A.
Dutkiewicz, D.
Powiązania:
https://bibliotekanauki.pl/articles/288836.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
technological process
technological operation
topological model
functional graphs
proces technologiczny
operacja technologiczna
model topologiczny
graf funkcjonalny
Opis:
The paper discusses an approach to the question of the possibility of a mathematical description of discrete processes. On the basis of these processes a large class of manufacturing equipment – production lines and systems for the processing of fish was generated. The use of mathematical models in the early stages of the design will improve the efficiency and quality of the produced equipment and reduce the risks and costs during the design work. We propose to describe the processes of fish processing by topological models that are presented in the form of functional graphs. Overall, the proposed approach will develop new design methods of fish processing equipment.
W pracy omówiono podejście do kwestii możliwości matematycznego opisu dyskretnych procesów. Na podstawie tych procesów tworzona jest szeroka gama urządzeń przemysłowych - linie produkcyjne i systemy do przetwarzania ryb. Wykorzystanie modeli matematycznych we wczesnych etapach tworzenia może poprawić wydajność i jakość wytwarzanych maszyn i zmniejszenia ryzyka oraz koszty podczas prac projektowych. Zaproponowano opis procesów przetwórstwa ryb z wykorzystaniem modeli topologicznych, które są prezentowane w postaci wykresów funkcjonalnych. Ogólnie rzecz biorąc, proponowane podejście umożliwi opracowanie nowych metod projektowania urządzeń przetwórstwa rybnego.
Źródło:
Inżynieria Rolnicza; 2013, R. 17, nr 4, t. 2, 4, t. 2; 31-37
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Issues of the Impact of Granulated Sulfur Transportation on the Environmental Components
Autorzy:
Ivanov, Andrey V.
Smirnov, Yuriy D.
Lisay, Viktoria V.
Borowski, Gabriel
Powiązania:
https://bibliotekanauki.pl/articles/24201741.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
granulated sulphur
dust suppression
transportation
sulphur dioxide
spillage
ignition
Opis:
Nowadays, sulfur is considered one of the primary resources of the chemical industry, most of which is produced as a refinery by-product during the processing of oil and natural gas. Sulfur production volumes are increasing every year, while the demand for it does not always match the growing supply, which leads to a serious problem of sulfur surplus in the world market. Granulated sulfur – the main commercial type of elemental sulfur – is transported in large quantities both by land and sea and can have a negative impact on the environment. At the moment, the issue of the negative impact of granulated sulfur on the environment has not been fully studied, which determines the relevance of this research. This review article presents the global market of granulated sulfur, paying attention to its safe transport – from the producer to the consumer. The potentially harmful factors of the impact of sulfur handling on elements of the natural environment, such as atmospheric air, water reservoirs, soil and vegetation, were also taken into account.
Źródło:
Journal of Ecological Engineering; 2023, 24, 6; 86--97
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Waste Properties of Subway Construction as a Potential Component of Soil Layer
Autorzy:
Ivanov, A. V.
Smirnov, Y. D.
Petrov, G. I.
Powiązania:
https://bibliotekanauki.pl/articles/124091.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
subway
waste
soil
landfill
mine site
hazard class
total carbon
moisture
biotesting
Chlorella algae
Opis:
The construction of subway stations is inevitably accompanied by the formation of a large amount of waste that is extracted from the underground workings by rock. When the waste is transported, the air is polluted with the exhaust gases of the dump trucks, some of the waste can stay on the road surface, the use of dump trucks increases the load on the roadway, the disposal of waste at landfills harms the environment, and enterprises pay fees for the transportation as well as placement of the waste. The article deals with the waste from the construction of new stations in the Saint-Petersburg subway. In order to determine the possibility of using waste in the municipal economy, a comprehensive analysis of this waste was carried out, including determination of moisture content, acidity, total carbon content, as well as chemical and granulometric composition. On the basis of the study results, it was established that the waste in question belongs to the hazard class 5, which enables to use it as a component of the soil mixture. Afterwards, the hazard class 5 was confirmed by the method of bioassay based on the determination of water toxicity by changing the optical density of the Chlorella algae culture.
Źródło:
Journal of Ecological Engineering; 2018, 19, 5; 59-69
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Dust Transfer Processes During Loading and Unloading Operations Using Software Simulation
Autorzy:
Smirnov, Y. D.
Ivanov, A. V.
Powiązania:
https://bibliotekanauki.pl/articles/123999.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bunker
dust suppression
ANSYS
simulation
ROCKY
hopper
Opis:
In order to limit dust transfer during the operations of material transportation at the factories of the construction industry, factories of the mineral and raw materials complex employ special dust suppression bunkers. These devices are structures located above a railway hopper (either a truck body or a conveyor). Through the input portal of the device, the transported material is transferred. Dusting can also be carried out under the bunkers from the side of the hopper, into which the material is poured. The design of dust suppression bins should be accompanied by a simulation of dust propagation processes. The simulation should be carried out in order to minimize the dust emissions and to select the optimum locations for the dust suppression sprayers.
Źródło:
Journal of Ecological Engineering; 2018, 19, 4; 29-33
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
H2O2 production in chloroplasts, its outward diffusion through aquaporins, and the effects of light intensity
Autorzy:
Borisova-Mubarakshina, M.
Kozuleva, M.
Rudenko, N.
Vetoshkina, D.
Naydov, I.
Ivanov, B.
Powiązania:
https://bibliotekanauki.pl/articles/81009.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
hydrogen peroxide
superoxide radical
chloroplast
diffusion
thylakoid
reactive oxygen species
aquaporin
light intensity
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
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