Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "holes" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-25 z 125
Tytuł:
Black holes: do they exist?
Autorzy:
Malec, Edward
Powiązania:
https://bibliotekanauki.pl/articles/691080.pdf
Data publikacji:
2018
Wydawca:
Copernicus Center Press
Tematy:
history of physics
history of black holes
first observations of black holes
present status of black holes
black holes
Opis:
Black holes entered scientific literature as early as at the end of eighteenth century. They had been known at that time as dark stars, but their concept did not find its way to physics or astronomy, and had been abandoned for more than one hundred years. I shall sketch historical developments and discuss present mathematical and observational status of black holes.
Źródło:
Zagadnienia Filozoficzne w Nauce; 2018, 65
0867-8286
2451-0602
Pojawia się w:
Zagadnienia Filozoficzne w Nauce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fastest curves and toroidal black holes
Autorzy:
Woolgar, E.
Powiązania:
https://bibliotekanauki.pl/articles/1342685.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
We discuss an apparent paradox (and conjectured resolution) of Jacobson and Venkataramani concerning 'temporarily toroidal' black hole horizons, in light of a recent connectivity theorem for spaces of complete causal curves. We do this in a self-contained manner by first reviewing the 'fastest curve argument' which proves this connectivity theorem, and we note that active topological censorship can be derived as a corollary of this argument. We argue that the apparent paradox arises only when one dispenses with the invariant viewpoint provided by the connectivity theorem in favour of an observer-dependent description. Finally, we discuss an alternative to fastest curve arguments, which can be used to construct a self-contradictory null line in certain spacetimes violating topological censorship. These arguments may shed light on the relationship between topological and cosmic censorship.
Źródło:
Banach Center Publications; 1997, 41, 1; 233-242
0137-6934
Pojawia się w:
Banach Center Publications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regional features analysis of plugged holes of dense phase gas-solid separation fluidized bed
Autorzy:
Zhang, B.
Zhao, Y.
Luo, Z.
Song, S.
Duan, C.
Dong, L.
Powiązania:
https://bibliotekanauki.pl/articles/109699.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
gas-solid fluidized bed for separation
pressure fluctuation
plugged holes regions
features analysis
plugged holes sensitivity
Opis:
In contrast to traditional coal separation, dry separation does not require water and does not cause water pollution. Dense phase gas–solid fluidized beds are used for dry separation. The plugged holes in the air distributor should be tested to ensure the stability of these beds for particle separation. The pressure fluctuation is sensitive to these plugged holes. This sensitivity can be tested and diagnosed by determining the standard deviation of the pressure fluctuation. In areas with partial blockage, that is the areas with weak fluidization, a decrease in the volume fraction of the particles and in the pressure differences in the transverse of the bed results in an increase of the standard deviation of the pressure fluctuation, thereby stimulating the lateral mixing of medium-sized particles. The standard deviation and the mixing intensity decrease axially. The value of sensitivity of the plugged holes in the air distributor decreases as the height of the bed increases. The features of air distributors affect the surrounding areas. The distribution law determining the influence of plugged holes on the beds is symmetrical. As the blockage of the fluidized bed distributor region increases, the mean square error of the pressure fluctuation in the related regions increases. The intensity of the effect is proportional to the distance to the plugged holes.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 2; 667-679
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The research on the technological system in deep holes chambering process
Autorzy:
Świć, A
Draczew, O
Szot, T
Majdalawi, S
Powiązania:
https://bibliotekanauki.pl/articles/103152.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
deep holes chambering
technological system
mathematical model
Opis:
Two-mass model of bitool chambering was introduced. Build on its basis mathematical model of deep holes chambering was used to conduct numerical analysis of the system. By optimizing parameters of machine-fixture-part-tool system one can reduce the time of transitory processes, increase dynamic rigidity and decrease tremblings level during deep hole chambering, what allows to increase their accuracy and machining efficiency.
Źródło:
Advances in Science and Technology. Research Journal; 2012, 6, 16; 7-12
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of relative strain ratio on the reduce roughness surface layer tube holes after burnishing process
Autorzy:
Dyl, T.
Powiązania:
https://bibliotekanauki.pl/articles/247905.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
surface plastic forming
burnishing broaching process
tube holes
roughness surface
Opis:
Burnishing technology is a technology of surface plastic forming of machine parts. The paper presents experimental research of burnishing process of the steel tube holes. Used tools to burnishing technology are hard and smooth surface. Burnishing elements are of ball, roll and disk. Burnishing be flat surfaces, and cylindrical shape. Burnished surfaces are cylindrical outer and inner. Because of the type of the force can be divided into static and dynamic burnishing. Due to the kinematics can be divided into sliding and roller burnishing. Occurrence of moving parts in direct contact with the material qualifies for the group process of burnishing rolling. The sliding burnishing design element property is part of the work surface burnished permanently attached to the handle. Burnishing is used as a finishing strengthens and smoothness can be realized on the universal machine tools and machining centres, effectively replaces the machining operations, such as grinding, reaming, honing and lapping. The precise tube holes are made mostly methods abrasive machining. Machining these methods can usually maintain a within the tolerances established by the constructor size and shape and surface roughness. However, there is not achieved a satisfactory state surface layer of tube holes. Improve the properties of the surface layer can be obtained after application, as finishing, broaching the slide burnishing. It consists in pushing through the machined hole tool in the shape of a sphere or a special plunger mandrel. After burnishing broaching is increased diameter, reduced roughness surface and improve the physical properties work piece surface layer of the tube holes. Burnishing broaching process can increase the dimensional accuracy of tube holes, reducing the surface roughness, the strengthening of the surface layer, compressive residual stresses constitution. Compressive internal stresses substantially influence the fatigue life of machine parts. A burnishing broaching is carry out by a ball. In the paper presents results measurements roughness and impact of the relative strain ratio on the surface layer after burnishing broaching process.
Źródło:
Journal of KONES; 2012, 19, 2; 137-143
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of temperature of black holes in terms of Chandrasekhar limit
Autorzy:
Mahto, D.
Jha, B. K.
Singh, K.M.
Ram, M.
Powiązania:
https://bibliotekanauki.pl/articles/412044.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
black holes
formula for the temperature
Hawking
Einstein
Opis:
Stephen Hawking gave the formula for the temperature for the black holes as[wzór] . In the present research article, we have converted this formula in terms of Chandrasekhar limit [Mch] and also calculated their values for different test black holes existing in XRBs and AGN. [wzór] Kelvin.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2015, 40; 43-50
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelowanie stref zagrożenia dla odwiertów gazowych
Definition of danger zones for gas bore holes
Autorzy:
Bujok, P.
Damec, J.
Drabkova, S.
Jancik, P.
Rado, R.
Powiązania:
https://bibliotekanauki.pl/articles/299562.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
kopalnie
odwierty gazowe
gas bore holes
mining
Opis:
Eksploatacja złóż węglowodorów ciekłych i gazowych ma już długoletnią tradycję. Dlatego coraz częściej spotykamy się z negatywnymi skutkami tej działalności przede wszystkim po zaprzestaniu eksploatacji. Do skutków tych zaliczyć można zanieczyszczenia występujące w środowisku naturalnym, w warstwach powierzchniowych, zanieczyszczonych wodach po niekontrolowanych ucieczkach ropy naftowej w procesie eksploatacji lub przeróbki. Problemem są zlikwidowane przed laty odwierty ropne czy gazowe. Z powodu industrializacji terenów, a także długiego czasu, jaki upłynął od zakończenia eksploatacji, ich stan techniczny pozostawia wiele do życzenia. W pracy przedstawiono niektóre zagadnienia dotyczące prognozowania stref zagrożenia związanych z nieczynnymi już kopalniami ropy i gazu oraz podziemnymi magazynami gazu.
The exploitation of oil and gas has long lasting tradition. Therefore, more and more often there can be found negative results of this activity, above all so called ecologic loads. To these loads belong: a contamination of natural environment, contamination in superficial layer and contamination of water after uncontrolled leaks of rock oil during the mining or processing. Major problem are long closed gas and oil wells. Because of the industrialization of the areas, and also because of the long time, which passed since the end of exploitations, their condition leaves a lot to desire. This paper presents some of the problems concerning technical forecasting of out of operation oil and gas mines contamination zones.
Źródło:
Wiertnictwo, Nafta, Gaz; 2005, 22, 1; 97-103
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertical microzonation of ciliates in cryoconite holes in Ecology Glacier, King George Island
Autorzy:
Mieczan, Tomasz
Tarkowska-Kukuryk, Monika
Górniak, Dorota
Świątecki, Aleksander
Zdanowski, Marek
Adamczuk, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2051401.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
cryoconite holes
protozoa
biodiversity
Źródło:
Polish Polar Research; 2013, 2; 201-212
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of radial flow impeller balance holes on the net positive suction head for rotodynamic pumps
Autorzy:
Karaśkiewicz, K.
Złoty, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/175487.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
balance holes
net positive suction head (NPSH)
centrifugal pumps
cavitation
Opis:
The influence of balance holes of rotodynamic pumps on the net positive suction head is not fully clear. The lack of available information on the subject leads to the situations when deterioration in suction properties of the pump due to the presence of balance holes is recognized during pump test phase. Usually some holes are arbitrarily plugged. The paper analyses the influence of balance holes on net positive suction head characteristics. The measurement data are presented.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2017, 136; 47-54
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The issue of determining the geometric position deviation of the threaded holes
Autorzy:
Martikáň, P.
Drbúl, M.
Holubják, J.
Mrázik, J.
Joch, R.
Powiązania:
https://bibliotekanauki.pl/articles/957939.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
coordinate measuring systems
location gages
position deviation
threaded holes
Opis:
The present article analyzes the specific measurement strategies (techniques) of contact measurement that are used to determine the position deviation of the threaded holes using 3D coordinate measuring system. Furthermore, there are analyzed direct and indirect (location gages) measurement techniques to determine position of the threaded holes and results of the measurements.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 47-52
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sliding burnishing technology of holes in hardened steel
Technologia ślizgowego nagniatania otworów elementów maszyn ze stali hartowanej
Autorzy:
Przybylski, W.
Powiązania:
https://bibliotekanauki.pl/articles/175887.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
holes finishing
burnishing process
burnishing tools
obróbka wykończeniowa otworów
nagniatanie
narzędzia do nagniatania
Opis:
New technology with sliding burnishing of holes with cylindrical surface, made of hardened steel (60 HRC), is presented in the paper. Burnishing process was applied with specially designed tools. These tools can be used in CNC lathes and machining centres. After burnishing operation on hole ø 30 mm in satellite gear wheel the surface roughness parameter Ra = 0,02-0,04 mm was obtained. The method and results of research as well as technological conclusions are presented.
W artykule przedstawiono nową technologię otworów o gładkiej powierzchni, wykonanych w elementach maszyn ze stali hartowanej o twardości 60 HRC z zastosowaniem nagniatania ślizgowego. Obróbka wykończeniowa otworów odbywa się z użyciem specjalnych narzędzi nagniatających stosowanych na tokarkach CNC i centrach obróbkowych. Po nagniataniu otworu ø 30 mm w kole zębatym przekładni satelitarnej uzyskano powierzchnię o parametrze Ra = 0,02-0,04 mm. Podano przebieg i wyniki badań doświadczalnych oraz wnioski i zalecenia technologiczne.
Źródło:
Advances in Manufacturing Science and Technology; 2016, 40, 3; 43-51
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of Rotating Black Holes
Autorzy:
Vindana, W. M. H. P.
Wijewardena Gamalath, K. A. I. L.
Powiązania:
https://bibliotekanauki.pl/articles/1158501.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Hawking radiation
Hawking temperature
Kerr black hole
Kerr-Newman black hole
entropy
mass variation
rotating black holes
thermodynamic parameters
Opis:
Considering the analogy between classical thermodynamic parameters and black hole parameters, the four laws of thermodynamics are reinterpreted for Kerr and Kerr-Newman black holes. A simple model for the dynamic relationships was obtained by considering the surface area of the outer horizon of a Kerr and Kerr-Neumann black hole as the area of a perfect black body. Finding the conditions these black holes should satisfy, the equations were numerically solved and simulated for the Hawking temperature, Hawking radiation and entropy variations of Kerr and Kerr-Newman black holes. The Hawking temperature and Hawking radiation of a given rotating black hole drastically increases at the final stage of the black hole evaporation. In the meantime, the entropy of a rotating black hole drastically decreases through the time. The additional angular momentum and the charge effects gain high Hawking temperatures and high Hawking radiation values for the black holes while these effects reduce the entropy of the black holes.
Źródło:
World Scientific News; 2018, 114; 106-125
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on the stress concentration factor induced in double countersunk holes due to uniaxial tension
Autorzy:
Gharaibeh, Mohammad A.
Powiązania:
https://bibliotekanauki.pl/articles/1839778.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
metoda elementów skończonych
naprężenie
rozciąganie
double countersunk holes
stress concentration factor
finite element method
response surface method
uniaxial tension
Opis:
Finite element and response surface methods were utilized to investigate the stress concentration factor induced in isotropic rectangular plates with two identical countersunk rivet holes due to uniaxial tension. In this investigation, the finite element model was constructed using ANSYS software and used to produce stress concentration factor (SCF) data. Additionally, the response surface method (RSM) was implemented to characterize the influence of the problem geometric parameters on the SCF. Besides, RSM combined with least squares regression methods were employed to formulate a simple and effective equation to mathematically compute the stress concentration factor […] value. This equation was consequently verified with finite element analysis (FEA) results. Lastly, an optimum plate and holes configuration that minimizes the SCF was suggested and hence recommended.
Źródło:
International Journal of Applied Mechanics and Engineering; 2020, 25, 4; 59-68
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Area, depth and elevation of cryoconite holes in the Arctic do not influence Tardigrada densities
Autorzy:
Zawierucha, Krzysztof
Vonnahme, Tobias R.
Devetter, Miloslav
Kolicka, Małgorzata
Ostrowska, Marta
Chmielewski, Sebastian
Kosicki, Jakub Z.
Powiązania:
https://bibliotekanauki.pl/articles/2046817.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
cryoconite holes
ecology
Glaciers
Svalbard
Tardigrada
Źródło:
Polish Polar Research; 2016, 37, 2; 325-334
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Rapid Prototyping technology in the manufacturing of turbine blade with small diameter holes
Autorzy:
Deja, M.
Dobrzyński, M.
Flaszyński, P.
Haras, J.
Zieliński, D.
Powiązania:
https://bibliotekanauki.pl/articles/259963.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
turbine blade
small diameter holes
Rapid Prototyping/Rapid Manufacturing
Direct Metal Laser Sintering (DMLS) technology
Opis:
The article presents the possibilities++ of using Rapid Prototyping (RP) technology in the manufacturing of turbine blades with small diameter holes. The object under investigation was gas turbine blade with small diameter cooling holes and holes for generating longitudinal vortices. A turbine blade model was produced by means of Direct Metal Laser Sintering (DMLS) technology and subsequently validated in terms of detection and accuracy of the obtained holes. The application of the computer tomography and digital radiography technique resulted in obtaining a series of cross-sections of the turbine blade model with a series of holes. Particular attention was pointed out at the investigation of the locations of micro-holes with a diameter of 0.3 mm. It turned out that it was impossible to make such small holes by the RP method. In the following part the results of the study on the possibilities of making the micro-holes using electrical discharge method have been presented. In addition, proposition of further works such as the development of the considerations and issues discussed in this article, has been offered.
Źródło:
Polish Maritime Research; 2018, S 1; 119-123
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of fuel injector holes diameter on parameters of combustion process in the cylinder of the marine 4-stroke Diesel engine
Autorzy:
Kowalski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2073635.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine engine
multidimensional model
combustion model
fuel injection
holes diameter
silnik okrętowy
model wielowymiarowy
model spalania
wtrysk
średnica otworu
Opis:
The paper presents an analysis of the influence of the fuel injector nozzle holes diameter on parameters of the brake-up, evaporation and combustion process in the cylinder of the marine 4-stroke Diesel engine. Presented analysis was prepared in the basis on computational fluid dynamic model. Initial and boundary conditions of the model as well as data used to model validation were collected during the laboratory study. Calculations were conducted for nominal fuel holes diameter equals 0.375mm and diameters increased and decreased by 50μm and 100μm respectively. According to presented results the increase of the diameter of fuel nozzle holes causes the increase of fuel Sauter’s mean diameter in the initial stage of the injection process and the decrease of fuel process evaporation. The result of this phenomenon is the slowdown of the initial stage of the combustion process and the decrease of both pressure and temperature of combustion.
Źródło:
Journal of Polish CIMEEAC; 2016, 11, 1; 95--102
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Disentanglement and Black Holes: Information Problem
Autorzy:
Radosz, A.
Gusin, P.
Roszak, K.
Powiązania:
https://bibliotekanauki.pl/articles/1033709.pdf
Data publikacji:
2017-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
04.70.Dy
03.65.Ud
Opis:
One of the possible ways of formulation of an information loss paradox refers to an entanglement of the two particles created in a vicinity of an event horizon. Evolution of the entangled particles and an interaction with their own environments should lead to a decay of the entanglement. However obvious, such a perspective appears to be too naive in this case.
Źródło:
Acta Physica Polonica A; 2017, 132, 1; 132-134
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of stress concentration at closely placed holes in wing bearing area in anisotropic plater
Autorzy:
Maksymovych, Marta
Lazorko, Aleksandr
Maksymovych, Olesia
Dmitriiev, Oleh
Powiązania:
https://bibliotekanauki.pl/articles/2146734.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
stresses
composite materials
stress concentration
boundary integral equations method
plate with holes
wing bearing area
materiał kompozytowy
koncentracja naprężeń
metoda brzegowych równań całkowych
Opis:
In this article effective approach of the study of high-stress concentration at closely placed holes in wing bearing area (in anisotropic plates) is proposed. It is based on the boundary integral equation method with the additional use of the asymptotic method. The simplicity, precision of the approach and the stability of the solution are illustrated in the calculation of stresses in the plate with a circular hole, an elliptical hole, elongated holes, a plate with two closely spaced elliptical holes.
Źródło:
Diagnostyka; 2022, 23, 4; art no 2022302
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chruściki (Trichoptera) zagłębień śródpolnych południowej części Kujaw
Caddis flies (Trichoptera) from kettle holes of the Kujawy region
Autorzy:
Majecki, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/1038156.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Opis:
Kettle holes are very characteristic elements of the landscape of the Kujawy. In 21 localities all together 26 species of caddis flies were collected. Two of them (Ylodes conspersus and Limnephilus auricula) are new for the area. Investigated holes had different species diversity. In some of them the number of species and specimens indicated their high value for conservation.
Źródło:
Acta Universitatis Lodziensis. Folia Zoologica; 2000, 4
1230-0527
Pojawia się w:
Acta Universitatis Lodziensis. Folia Zoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of turbulent flow through axial thrust balance holes in rotodynamic pumps
Autorzy:
Karaśkiewicz, K.
Złoty, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/175249.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rotodynamic pumps
turbulent flow
Opis:
The results of numerical investigations of flow through axial thrust balance holes in impeller of low specific speed pump were presented. The results were compared with available empirical investigations. It is a lack of numerical analyses in foregoing literature on flow through rotating holes. The issue is important for designing rotodynamic pumps. There are difficulties in solving the problem of precisely computing the flow in balance holes analytically.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2015, 130; 57-69
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stimulating design creativity by public places in academic buildings
Autorzy:
Yuemin, H.
Linhong, J.
Powiązania:
https://bibliotekanauki.pl/articles/402358.pdf
Data publikacji:
2010
Wydawca:
Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Tematy:
creativity
environment
structural holes
public place
campus
Opis:
Design creativity is constrained by the limitations of knowledge of a given designer or even of a design team. Also, each design process is a dynamic process because novel design ideas may emerge spontaneously and their occurrence is unpredictable. One way to increase the probability that novel ideas are produced is to provide designers with additional knowledge, which will expand their design space. The other way is to create an environment stimulating generation of novel ideas. Such an environment should allow and encourage reflection, relaxation, formal and informal interaction among people, and knowledge sharing. The concept of structural hole in sociology is introduced and extended by distinguishing three classes of structural holes: domain, thinking, and working structural holes. It is postulated that an environment with abundance of structural holes can be created by proper public places. Such places should be comfortable to stay and easily accessible and they could be, for example, entrance halls, restaurants, activity centers, or corridors, which are discussed in the paper.
Źródło:
Structure and Environment; 2010, 2. no. 3; 5-13
2081-1500
Pojawia się w:
Structure and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 125

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies