Autor: Kovalenko, G. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Experimental validation for the training method and mathematical model of the pilot skill formation in maintenance of attitude orientation
Autorzy:: Kovalenko, G.
Balyasnikov, V.
Smurov, M.
Chepiga, V.
Tematy:: mathematical model
training method
pilot
artificial horizon
reliability
attitude orientation
model matematyczny
metoda szkoleniowa
sztuczny horyzont
niezawodność
orientacja w przestrzeni; Pokaż więcej
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:: https://bibliotekanauki.pl/articles/374729.pdf Link otwiera się w nowym oknie
Opis:: In order to overcome the drawbacks in artificial horizon indicator (HI) of inside-in type (a view from an aircraft (A/C)), where pilots produce mistakes in maintenance of attitude orientation most of all, the authors offer a novel training method. The method is based on the hypothesis that the manipulative ability of a human visual system can be trained. A mathematical model for the data accumulation during the corresponding training procedure has been proposed. Construction, design and results of the model evaluation are presented in the article. The experimental results revealed the increase of the probability of faultless operation by the test group of up to 0,892, whereas the faultless operation probability of a control group was 0,726. Thus, the trainee-students have statistically increased the reliability for the maintenance of attitude orientation thanks to the proposed method, and the hypothesis was confirmed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Modification of Polyurethane Solutions by Means of a Hard Depositor for Fiber Production by the Electrospinning Method
Modyfikacja roztworów poliuretanowych za pomocą mocnego depozytora do produkcji włókien metodą elektroprzędzenia
Autorzy:: Bokova, E. S.
Kovalenko, G. M.
Pawłowa, M.
Bokova, K. S.
Evsyukova, N. V.
Tematy:: fibers electrospinning
polyurethane
polymer solutions processing
solutions modification
elektroprzędzenie włókien
poliuretan
przetwarzanie roztworów polimerowych
modyfikacja rozwiązań; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/233571.pdf Link otwiera się w nowym oknie
Opis:: The article is devoted to fundamental and applied research in the field of the processing of polymer solutions. The purpose of this work was to identify the possibility of using modified solutions of polyurethanes for processing by electrospinning, and also to study the impact of the composition of the moulding solution on the structure and properties of fibrous materials. Nonwoven materials were obtained by electrospinning fibers from PUR solutions using NanospiderTM technology. The transfer of solutions into a metastable state, both inthe case of film systems and fibers, leads to a change in the structure of the material: porosity and fiber diameter.
W artykule skupiono się na podstawowych badaniach z zakresu przetwarzania roztworów polimerowych. Celem pracy było określenie możliwości zastosowania zmodyfikowanych roztworów poliuretanów do przetwarzania metodą elektroprzędzenia, a także zbadanie wpływu składu roztworu do formowania na strukturę i właściwości materiałów włóknistych. Włókniny otrzymano przez elektroprzędzenie włókien z roztworów PUR z wykorzystaniem technologii NanospiderTM. Przeniesienie roztworów do stanu metastabilnego, zarówno w przypadku systemów foliowych, jak i włókien, prowadzilo do zmiany struktury materiału: porowatości i średnicy włókna.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Obtaining New Biopolymer Materials by Electrospinning
Technologia elektroprzędzenia jako perspektywiczna metoda wytwarzania włóknin z biopolimerów
Autorzy:: Bokova, E. S.
Kovalenko, G. M.
Filatov, I. Y.
Pawłowa, M.
Stezhka, K. S.
Tematy:: electrospinning of fibres
collagen hydrolyzate
biopolymer materials
chitosan
elektroprzędzenie włókien
hydrolizat kolagenu
materiały biopolimerowe
chitozan; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/233909.pdf Link otwiera się w nowym oknie
Opis:: The paper covers aspects of the technology of fibre electrospinning for the production of nonwoven fabrics for various application areas. The conditions of forming nano- and microfibres from solutions of collagen hydrolyzate and dibutyrylchitine were studied as well as polymer-polymer complexes based on polyacrylic acid, polyvinyl alcohol and polyethylene oxide. A comparative analysis of different methods of electrospinning – electrocapillary, electric and NanospiderTM , was conducted. Promising application areas of non-woven fabrics in medicine sanitation as well as for clothing and footwear production are shown.
W artykule przedstawiono aspekty technologii elektroprzędzenia włókien do produkcji włóknin różnego przeznaczenia. Zbadano warunki formowania nano- i mikrowłókien z roztworów hydrolizatu kolagenu, dibutyrylchitinu jak również kompleksów polimer-polimer na bazie kwasu poliakrylowego, alkoholu poliwinylowego i tlenku polietylenu. Przeprowadzono analizę porównawczą różnych metod elektroformowania – elektrokapilarnej, elektroodśrodkowej i Nanospider TM metody. Przedstawiono perspektywiczne obszary zastosowania włóknin w medycynie oraz produkcji obuwia i odzieży.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Interpolymer Complexes as Modifying Compounds for Reducing Cotton Blended Fabric Flammability
Układy wykończeniowe do tekstyliów bawełnianych poprawiające ich odporność na palenie
Autorzy:: Bokova, E. S.
Kovalenko, G. M.
Woźniak, B.
Pawłowa, M.
Bokova, K. S.
Grzesiak, E.
Tematy:: textiles
interpolymer complexes
oxygen index
fire safety
laying the grain
tekstylia
włókno bawełniane
kwas poliakrylowy
polimery niejonowe
indeks tlenowy
bezpieczeństwo pożarowe; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/232840.pdf Link otwiera się w nowym oknie
Opis:: In this study modifying compounds on the basis of interpolymer complexes (IPC) of polyacrylic acid with nonionic polymers (polyvinyl alcohol, polyethylene oxide, polyacrylamide) were obtained. The conditions for formation of polymer-polymer complexes in aqueous media were studied. The method of impregnation of cotton blended fabrics with different surface mass of compositions based on interpolymer complexes of stoichiometric and non-stoichiometric composition is presented. The possibility of adjusting the gain of IPC in tissue structure was also determined. The impact of IPC was proved to increase the oxygen index of tissues, reducing their flammability, with an almost complete reduction of the self-combustion time.
Przedstawiono wyniki badań kompozycji wykończeniowych opartych na kwasach poliakrylowych i polimerów niejonowych (alkoholu winylowego, poliakryloamidu). Badano warunki formowania układów polimer-polimer oraz możliwości wprowadzania ich w strukturę włókna bawełnianego. Stwierdzono, że związki te podwyższają indeks tlenowy oraz redukują czas palenia.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Post-harvest green manure yield and amount of organic matter applied into the soil during plowing
Produktywność poplonów przeznaczonych na zielony nawóz oraz ilość materii organicznej wprowadzanej do gleby w czasie orki
Autorzy:: Demydas, G.
Kovalenko, V.
Feschun, A.
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/82892.pdf Link otwiera się w nowym oknie
Opis:: W badaniach oceniano produktywność poplonów przeznaczonych na zielony nawóz i stanowiących źródło odżywiania mineralnego upraw następczych. Oceniano ilość suchej masy i ogólną wartość odżywczą poplonów uprawianych w leśno-stepowej strefie Ukrainy. Stwierdzono, że przyrosty zielonej masy przeznaczonej na nawóz zależały od warunków wilgotnościowych w okresie pożniwnym; największe mieściły się w granicach 16–23 t . ha–1.
It was studied the yield of post-harvest green manure on crop efficacy as a source of mineral nutrition of the following crops and gross dry matter content and basic nutrients in it in the Forrest-Steppe zone of Ukraine. It was found that the greatest increase in green mass of green manure, depending on moisture conditions of post-harvest period was 16–23 t . ha–1.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Optimal project parameters of the bridge cranes main beams
Autorzy:: Vishnevetsky, G.
Kovalenko, V.
Sydorenko, S.
Brewczyński, D.
Tematy:: machine building
bridge cranes
span beams
geometrical section parameters
optimal beam
constructions
time of free vibrations' decay; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/247431.pdf Link otwiera się w nowym oknie
Opis:: In the article are presented main principles and leads-up to the choice of the general criterion of the main beams’ optimization. The main reasons leading to the destruction of arms include cyclic load causing fatigue phenomena, creep occurrence causing elements deformation beyond a critical state, the constructions’ blistering appearing owing to the metal maturing, corrosion of the main beams’ elements, leading to the loss of their carrying capacity. The general optimization criterion is chosen. The parameters of the main beams’ endurance are defined. The device for the measuring of the size and the character of the vibrations’ decay of the bridge cranes’ main beams is suggested. We have the results of the experimental information, received on the bridge cranes of the different plants. The work directions by the optimization of the constructive parameters of the cranes’ main beams are defined. Into the suggested construction of the span beam are put such statements: high values of the general optimization criterion’s; stiffness of the arm to the reduced weight ratio, possibility of the beam’s creation of the equal resistance, minimization of the local deflection tensions from the load cart on account of the inclined walls’ position. The construction of the patented span beam of the diaphragm construction is observed and described.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Optimal service term of the bridge cranes
Autorzy:: Kovalenko, V.
Vishnevetsky, S.
Brewczyński, D.
Tora, G.
Tematy:: bridge cranes
resource
modelling
constructive parameters; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/245050.pdf Link otwiera się w nowym oknie
Opis:: The questions of the rational/optimal service term of the warehouse bridge cranes on the exploitation and projection stages are observed. The method of the residual crane resource’s definition by the criterion of the specific reduced responses is suggested. On the stage of the crane projection, the forecasting of the warehouse cranes’ resource in coordination with their constructive parameters is expedient. The existing task has main aspects: recognition of the residual crane resource and definition of the project crane resource. In course of time in the massive of the sample from the low carbon steel occur changes: grows firmness, equalize the internal tensions, little internal cracks “overgrow”, sometimes the groups of little cracks create macrocracks. This are a diffusion action. The definition of the rational constructive parameters is being carried out on the base of the work processes’ mathematical modelling. On the base of modelling is defined the size of the residual deflection of the main beam that is formed during one work crane cycle considering the action of the main beams’ free vibrations in the processes of start and braking considering the factor of the attenuation of those vibrations. In result of the modelling, we receive the microscopic size of the residual deflection, formed during one work cycle. On the base of the multisession modelling is noticed that the crane resource can be prolonged on 20-50%.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Novel potential of pancreatic-like enzymes of microbial origin in exocrine pancreatic insufficiency - study on a pig model
Autorzy:: Szwiec, K.
Goncharova, K.
Velverde-Piedra, J.L.
Ushakova, G.
Kovalenko, T.
Osadchenko, I.
Kardas, M.
Swieboda, P.
Podgurniak, P.
Winiarczyk, M.
Grochowska-Niedworok, E.
Lozinska, L.
Filip, R.
Pierzynowski, S.G.
Tematy:: pancreatic-like enzyme
microbial enzyme
exocrine pancreatic insufficiency
porcine model
pig
animal model
enzyme activity; Pokaż więcej
Wydawca:: Instytut Medycyny Wsi
Powiązania:: https://bibliotekanauki.pl/articles/3181.pdf Link otwiera się w nowym oknie
Opis:: Introduction. The standard porcine-derived pancreatic enzyme replacement therapy (PERT) is a lifesaving treatment for patients with diseases causing exocrine pancreatic insufficiency (EPI). An attempt to replace PERT with microbial enzymes were undertaken. The aim was to highlight whether the mode of application, mixed with food or applied directly to the stomach, of pancreatic-like enzymes of microbial origin (PLEM) can affect their activity along the gastrointestinal tract. Materials and method. The activity of amylase, lipase and proteinase in the stomach, duodenum and ileum were tested in EPI pigs (n=6) after supplementation of PLEM, either orally – before and during feed consumption – or via the stomach – before and during feed consumption. Healthy pigs not treated with PLEM (n=3) served as controls. Activity of the enzymes measured in the chyme were obtained together with the digesta pH. Activity of the enzymatic residues in the stool samples was also checked. Results. The highest pancreatic enzyme activities were found in the duodenum of the healthy pigs (amylase 162,68 kU/ mL, lipase 507,34 kU/mL and protolitic (trypsin) activity 357,60 kU/mL). Nevertheless, the microbial enzymes remained also active along the entire length of the GIT – including stomach in EPI pigs, regardless of their route of administration. However, activity level was significantly lower. Discussion. Results indicate that the activity pattern of PLEM in the small intestine mimics the activity of the natural endogenous pancreatic enzymes in healthy pigs. The most physiological features of PLEM were observed when enzymes were offered orally. The magnitude of PLEM activity in the stomach of EPI pigs was essential and significantly higher than that measured in healthy pigs, thus being somewhat not physiological, and for health reasons of the patients should be further explored. Interestingly, specific trypsin-like activity was measured in all parts of the GIT after PLEM application. However, proteolytic activity of the experimental proteaze in in vitro studies did not exhibit trypsin-like activity.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The small acceptance vertex detector of NA61/SHINE
Autorzy:: Merzlaya, Anastasia
Kovalenko, V.
Feofilov, G.
Aduszkiewicz, A.
Luise, S. Di
Płaneta, Roman
Koziel, M.
Mik, L.
Dorosz, P.
Baszczyk, M.
Larsen, Dag
Brylinski, W.
Gazdzicki, M.
Ali, Yasir
Kucewicz, W.
Snoch, A.
Tefelski, D.
Staszel, Paweł
Deveaux, M.
Martinengo, P.
Suljic, M.
Jabłoński, Michał
Lazareva, T.
Vechernin, V.
Igolkin, S.
Opis:: Charmonium production in heavy ion collisions is considered as an important diagnostic probe for studying the phase diagram of strongly interacting matter for potential phase transitions. The interpretation of existing data from the CERN SPS is hampered by a lack of knowledge on the properties of open charm particle production in the fireball. Moreover, open charm production in heavy ion collisions by itself is poorly understood. To overcome this obstacle, the NA61/SHINE was equipped with a Small Acceptance Vertex Detector (SAVD), which is predicted to make the experiment sensitive to open charm mesons produced in A-A collisions at the SPS top energy. This paper will introduce the concept and the hardware of the SAVD. Moreover, first running experience as obtained in a commissioning run with a 150 AGeV/c Pb+Pb collision system will be reported.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

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Skocz do pozycji: 10.

Tytuł:: A high-resolution pixel silicon Vertex Detector for open charm measurements with the NA61/SHINE spectrometer at the CERN SPS
Autorzy:: Kovalenko, V.
Luise, S. Di
Mik, L.
Deveaux, M.
Feofilov, G.
Brzychczyk, Janusz
Płaneta, Roman
Suljic, M.
Kucewicz, W.
Vechernin, V.
Bajda, M.
Gazdzicki, M.
Larsen, Dag
Dorosz, P.
Majka, Zbigniew
Merzlaya, Anastasia
Bryliíski, W.
Lazareva, T.
Staszel, Paweł
Koziel, M.
Aduszkiewicz, A.
Igolkin, S.
Tefelski, D.
Baszczyk, M.
Martinengo, P.
Jabłoński, Michał
Opis:: The study of open charm meson production provides an efficient tool for the investigation of the properties of hot and dense matter formed in nucleus–nucleus collisions. The interpretation of the existing di-muon data from the CERN SPS suffers from a lack of knowledge on the mechanism and properties of the open charm particle production. Due to this, the heavy-ion programme of the NA61/SHINE experiment at the CERN SPS has been extended by precise measurements of charm hadrons with short lifetimes. A new Vertex Detector for measurements of the rare processes of open charm production in nucleus–nucleus collisions was designed to meet the challenges of track registration and high resolution in primary and secondary vertex reconstruction. A small-acceptance version of the vertex detector was installed in 2016 and tested with Pb + Pb collisions at 150 A GeV / c. It was also operating during the physics data taking on Xe + La and Pb + Pb collisions at 150 A GeV / c conducted in 2017 and 2018. This paper presents the detector design and construction, data calibration, event reconstruction, and analysis procedure.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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