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Wyświetlanie 1-15 z 18
Tytuł:
Model of the flexible syncronous productive line with reduntant technological cell
Autorzy:
Swic, A
Mazurek, L.
Powiązania:
https://bibliotekanauki.pl/articles/118203.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
model
flexible
syncronous productive line
technological cell
Opis:
This paper introduces the mathematical model of operating the flexible syncronous productive line (FSPL) of multifunctional CNC machines, that includes one redundant multifunctional CNC machine which can take over functions of every FSPL machine. The graph of FSPL state, relations and equations used to calculate the reliability and the productivity were shown. Maple – the software used for reliability and productivity calculations and modelling as well as the mathematical results were presented.
Źródło:
Applied Computer Science; 2010, 6, 1; 29-41
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increasing the elasticity of multitasking machining using tooling for tools and workpiece clamping in a CNC machine tool
Autorzy:
Mazurek, L.
Taranenko, V.
Świć, A.
Taranenko, G.
Powiązania:
https://bibliotekanauki.pl/articles/117657.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
workpiece
tool
fastening
CNC machine tool
table
Opis:
The article presents rules for designing a device for fastening tools and machined parts to a CNC machine tool. Suggested tooling was used on machine tools already working in machining industry. Those machine tools can be elements of Flexible Production Systems. Presented solutions facilitate the application of CNC machine tools in low-volume and piece production.
Źródło:
Applied Computer Science; 2008, 4, 2; 103-116
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cats as a reservoir of Bartonella henselae for dogs
Autorzy:
Mazurek, L.
Winiarczyk, S.
Skrzypczak, M.
Adaszek, L.
Powiązania:
https://bibliotekanauki.pl/articles/2085112.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
Bartonella spp.
dogs
PCR
vector-borne disease
Opis:
Bartonellosis is a disease affecting a variety of animals. Many Bartonella infections are zoonotic, including cat scratch disease. Within the genus Bartonella are 45 species, of which more than 10 can infect cats and dogs. Companion animals serve as reservoirs for several zoonotic species of Bartonella, and may also serve as sentinels for zoonotic Bartonella species harbored by wildlife. The aim of this study was to determine the frequency of the occurrence of Bartonella spp. DNA in dogs from households where cats with clinical bartonellosis were kept. The presence of DNA with 99–100% compliance of the nucleotide sequence with the sequence of the Bartonella DNA isolated from cats was demonstrated in the body of 10% of tested dogs. The results indicate that cats serve as a Bartonella reservoir for dogs, and the dogs can play the same role with regard to humans.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 4; 669-671
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water tunnel visualisation and numerical analysis of flow around TS-11 Iskra wing with flow control surfaces
Autorzy:
Szczepaniak, R.
Walusiak, S.
Bąbel, R.
Mazurek, Ł
Stryczniewicz, W.
Kowaleczko, G.
Powiązania:
https://bibliotekanauki.pl/articles/244265.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
flow visualisation
TS-11 Iskra aircraft
aileron
flap
Opis:
The article presents investigation of flow around wing of TS-11 Iskra airplane. The flow visualization around 3D printed model of wing with flow control surfaces was performed in a water tunnel. Two configurations were investigated: first with a flap and second with an aileron. The flow visualisation was performed with a use of a dye. The geometry of model was prepared with use Computer Aided Design (CAD) software basing on scans of real object and technical documentation. The model was built with use of additive manufacturing technology. Movement of the flow control surfaces was remotely controlled with servomechanisms incorporated in channels inside the model. In order to perform qualitative validation of the results the investigated flow was simulated with use of CFD commercial software. The article presents visualisation results of flow around wing section of TS-11 Iskra airplane and water tunnel model preparation. In order to perform qualitative validation of the results the investigated flow was simulated with use of CFD commercial software. The goal of the research was to investigate the complex flow field in the vicinity of flow control surfaces and provide aerodynamic characteristics at various deployment angles via numerical simulations. The results can be used for verification of water tunnel testing procedures and training.
Źródło:
Journal of KONES; 2017, 24, 2; 253-261
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clinical course of granulocytic anaplasmosis in hunting dogs
Autorzy:
Teodorowski, O.
Winiarczyk, S.
Debiak, P.
Skrzypczak, M.
Mazurek, Ł.
Adaszek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2087166.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Anaplasma phagocytophilum
hunting dog
vector-borne disease
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 2; 175-181
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of surrounding the spillage time
Autorzy:
Mazurek, J.
Smolarek, L.
Powiązania:
https://bibliotekanauki.pl/articles/2069124.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
oil spill
stochastic model
firefighter problem
Opis:
This article presents the model of oil spill on the grid graph. We consider the three types of grid which parameters are corresponding to condition on the sea. The firefighter problem gives the algorithm to bound the oil spill. We compare the action starting time in model described by sum of N variables with the uniform probability distribution and the action starting time in real situation described by sum of two triangular random variables. For every type of grid we determine the Time Average of Going Around of the Spill.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 2; 245--250
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oil Spill Models: A State of the Art of the Grid Map as a Function of Wind, Current and Oil Parameters
Autorzy:
Mazurek, J.
Smolarek, L.
Powiązania:
https://bibliotekanauki.pl/articles/116520.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
oil spill
Oil Spill Model
Grid Map
wind
current
Oil Parameters
Opis:
An integrated model, which contains flow and transport‐fate modules, will be presented for simulating transport and fate of oil spills at seas. The flow module uses different kinds of meshes that provide great flexibility for modeling the flow in complex geometries of currents and barriers. The refined grid resolution in regions of interest is important. Horizontal diffusion is simulated using random walk techniques in a Monte Carlo framework, whereas the vertical diffusion process can be solved on the basis of the Langeven equation. The model contains the most significant processes which affect the motion of oil particles. For a better fit to the curvature of the coastline there are used unstructured non overlapping rectangular or triangle grid cells. Special attention must be paid to choose the horizontal and vertical resolution in simulating the oil trajectory in the coastal area.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 1; 19-23
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coastline change-detection method using remote sensing satellite observation data
Autorzy:
Markiewicz, Ł.
Mazurek, P.
Chybicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/331592.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
coastal monitoring
SAR
Sentinel
Landsat
background subtraction
image processing
Opis:
Coastal zones are not only the fundaments for local economics based on trade, shipping and transport services, but also a source of food, energy, and resources. Apart from offering diverse opportunities for recreation and tourism, coastal zones provide protection against storms and other meteorological disturbances. Environmental information is also essential because of the direct influence on a country’s maritime zones, which are territorial sea and exclusive economic zones. Keeping local communities and ecosystems healthy requires monitoring and assessing of all the vital changes of territorial sea and its baseline. The paper presents a method and a concept of a system that provides an efficient means of automatic analysis of spatial data provided by satellite observation systems (optical Landsat 8 and SAR Sentinel 1) in order to monitor, and detect, changes in the coastline. The proposed methodology is based on a set of algorithms that enable one to trace and detect changes in coastline shape, and eventual damage to marine infrastructure, such as breakwaters and harbours, relying on high resolution satellite observational products.
Źródło:
Hydroacoustics; 2016, 19; 277-284
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of random walk in two-dimensional lattice graphs to describe influence of wind and sea currents on oil slick movement
Autorzy:
Guze, S.
Mazurek, J.
Smolarek, L.
Powiązania:
https://bibliotekanauki.pl/articles/244325.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
random walk
oil spill
currents
Opis:
The concept of oil slick movement being influenced by wind and sea currents is elementary for the decision model of the distribution of large oil spill emergency control means at sea. The analysis of water area conditions such as wind and sea currents is elementary for the concept of oil slick movement. The article presents the model of oil slick movement under the influence of wind and sea currents. In building the model, random walk in two-dimensional lattice graphs has been used. The movement of oil slick is analysed in two ways. In the paper, the movement of the oil slick is analysed in two ways without wind and focus on surface sea currents and with wind and currents. Case one assumes no wind and focuses on surface sea currents only using random walk in a two-dimensional square grid graph. Case two assumes that wind is in place, so oil slick is moving due to surface sea currents and wind currents. The description of movement in case two is based on a two-dimensional lattice graph, which is a combination of a triangular grid graph and a hexagonal grid graph. The article also describes the basic assumptions of oil slick model: the definition of water area, oil slick and algorithm for rescue action to contain the oil spill. Oil slick movement concept is elementary for the decision model of oil spill control at sea. The model allows estimating the distance of oil slick from coastal areas.
Źródło:
Journal of KONES; 2016, 23, 2; 147-153
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of vibrations generated by handheld household appliances on temperature changes of user hands
Autorzy:
Wojsznis, M.
Mazurek, I.
Różański, L.
Barczewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/128172.pdf
Data publikacji:
2018
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
vibrations
thermography
household appliances
drgania
termografia
sprzęt AGD
Opis:
The paper presents an analysis of influence of vibrations generated by small hand-held household appliances on temperature changes of hands. To visualize thermal changes of operators’ hands a thermographic camera was used. During the tests values of acceleration of device handle vibrations at points of contact with operators’ hands were recorded simultaneously. It has been observed that even during short periods of work the hand temperature changes significantly. The biggest recorded change was equal to 3°C. The tests have shown that the influence of vibrations is in this case sensed more strongly particularly by fingers and a wrist. The analysis of results has shown purposefulness of pointing out synergistic influence of vibrations and thermal changes caused by commonly available appliances on a human body.
Źródło:
Vibrations in Physical Systems; 2018, 29; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Copper and iron deficiency in dairy cattle
Autorzy:
Abramowicz, B.
Kurek, L.
Chalabis-Mazurek, A.
Lutnicki, K.
Powiązania:
https://bibliotekanauki.pl/articles/1192794.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
haematology
copper and iron deficiency
dairy cows
Opis:
Copper deficiency is a common homeostatic disorder in dairy cattle farms in Poland. A simultaneous decrease in blood copper and iron concentrations is very rarely diagnosed and described in dairy cows. Copper is necessary for the mobilization of iron from the liver and its transport to bone marrow, where it is used for erythropoiesis. The aim of the study was to observe changes in haematological parameters in cows, resulting from copper deficiency or simultaneous deficiency of copper and iron, in comparison with animals from the same herds in which no deficiencies of these micronutrients were found. The study was conducted on 56 cows of the HF breed, aged from 3 to 6 years, from 3 dairy farms. The animals selected for the study were divided into three groups, two deficiency groups and one control group – without deficiency. Group I comprised animals with reduced concentration of copper in the serum, while group II comprised animals with low copper and iron concentrations. Group III comprised healthy cows without clinical symptoms and mineral deficiency. In both deficiency groups, the one characterized by a low concentration of copper, as well as the one with low concentrations of copper and iron, a reduction in red blood cell parameters, which was statistically significant versus the control group, was observed. In the examined animals, normocytic normochromic anaemia was found in group I, while normocytic hypochromic anaemia was diagnosed in group II. Cows with simultaneous Cu and Fe deficiency have worse milk yield results and they are more often culled from the herd. It is not clear why only some animals in a herd develop simultaneous deficiency of these micronutrients.
Źródło:
Journal of Elementology; 2021, 26, 1; 241-248
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The computer network topologies designs and the coherent graphs algebra
Autorzy:
L. Krivoi, Sergiy
Hajder, Mirosław
Dymora, Paweł
Mazurek, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/764665.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2006, 5, 1
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of HID-lamp light emission differences for different power supply methods
Autorzy:
Tomczuk, K.
Mazurek, P.
Hemka, L.
Kasprowicz, A.
Błażejczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/201908.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
plasma temperature
electronic ballast
electromagnetic ballast
lamp current
light flux
light pulsation
high intensity discharge lamp
temperatura plazmy
statecznik elektroniczny
statecznik elektromagnetyczny
prąd lampy
strumień światła
pulsacja światła
wysoka intensywność lampy wyładowczej
Opis:
This paper presents investigation of methods for reducing light pulsation and plasma temperature inside a high intensity discharge (HID) lamp arc tube. Differences found in light emission of an arc tube plasma channel under different power supply methods are presented and discussed in this work. The novelty of the paper lies in systematical investigation of different power converter supply methods and demonstrating that it has a significant influence on plasma temperature in an arc tube. The tested lamp was powered by electronic ballasts controlled by different algorithms, which forced their current waveform. To compare the results, the authors performed measurements on a discharge lamp powered by a standard electromagnetic ballast. The investigation of plasma parameters is based on the optical spectroscopy method. It was shown that by using the appropriate current shape of a high switching frequency supply converter, the plasma temperature of an HID lamp can be reduced almost by half.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 915-923
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anticorrosion Properties and Morphology of Phosphate Coating Formed on Nitrided Surface of 42CrMo4 Steel
Autorzy:
Kapuścińska, A.
Kwiatkowski, L.
Wach, P.
Mazurek, A.
Diduszko, R.
Powiązania:
https://bibliotekanauki.pl/articles/356565.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
corrosion resistance
phosphating
gas nitriding
γ' nitrides
ε nitrides
Opis:
The subject of the study concerns the enhancement of corrosion and wear resistance of nitrided 42CrMo4 steel by the formation of zinc phosphate top layer. The present work is aimed at the assessment of the effect of increasing thickness of nitrided layer from approximately 2 μm to 16 μm on the morphology and properties of zinc phosphate coating. XRD analysis showed that along with the increase in the thickness of the nitrides layer, a change in the phase composition was observed. SEM/EDS examination revealed that top layer consists of crystalline zinc phosphate coating. The shape and size of crystals does not significantly depend on a thickness of nitrides layer but corrosion resistance determined by potentiodynamic method in 0.5M NaCl increased with an increase of thickness of a “white layer”. Similarily the wear resistance determined by the 3-cone-roll test was also the highest for 16 μm nitride layer.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 471-477
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 18

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