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Wyświetlanie 1-15 z 348
Tytuł:
Holomorphic non-holonomic differential systems on complex manifolds
Autorzy:
Dimiev, S.
Powiązania:
https://bibliotekanauki.pl/articles/1312446.pdf
Data publikacji:
1991
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
power -expansion
Opis:
We study coherent subsheaves of the holomorphic tangent sheaf of a complex manifold. A description of the corresponding -stable ideals and their closed complex subspaces is sketched. Our study of non-holonomicity is based on the Noetherian property of coherent analytic sheaves. This is inspired by the paper [3] which is related with some problems of mechanics.
Źródło:
Annales Polonici Mathematici; 1991, 55, 1; 65-73
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coherent and strong expansions of spaces coincide
Autorzy:
Mardešić, Sibe
Powiązania:
https://bibliotekanauki.pl/articles/1205303.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
coherent expansion
coherent homotopy
inverse system
strong expansion
strong shape
Opis:
In the existing literature there are several constructions of the strong shape category of topological spaces. In the one due to Yu. T. Lisitsa and S. Mardešić [LM1-3] an essential role is played by coherent polyhedral (ANR) expansions of spaces. Such expansions always exist, because every space admits a polyhedral resolution, resolutions are strong expansions and strong expansions are always coherent. The purpose of this paper is to prove that conversely, every coherent polyhedral (ANR) expansion is a strong expansion. This result is obtained by showing that a mapping of a space into a system, which is coherently dominated by a strong expansion, is itself a strong expansion.
Źródło:
Fundamenta Mathematicae; 1998, 158, 1; 69-80
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coefficient of thermal expansion as a component quality estimation of alloys on pistons of combustion engines
Autorzy:
Sieminska, B.
Powiązania:
https://bibliotekanauki.pl/articles/245892.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
engine pistons
thermal expansion
coefficient of thermal expansion
Opis:
The aim of realized works in the area of materials on pistons is: low thermal expansion, small differences of coefficient of thermal expansion between heating and cooling, high stiffness at elevated temperatures, high hardness and wear resistance. Changes in thermal expansion coefficient during heating and cooling may be very large, as well as during subsequent cycles of heating and cooling of an internal combustion engine pis ton with respect to standard silumin alloys usedfor pistons of internal combustion engines. The paper presents: coefficient of linear expansion a for the AlSi standard alloy, coefficient of linear expansion a for the AlSi alloy with the apositive differences between cooling and heating, coefficient of linear expansion a for the AlSi alloy with the a negative differences between cooling and heating, coefficient of linear expansion a for the AlSi alloy with the apositive and negative differences between cooling and heating, coefficient of linear expansion a for the AlSi alloy with the apositive, negative and positive differences between cooling and heating, coefficient of linear expansion a for the AlSi alloy with the very small a differences between cooling and heating, coefficient relative elongation as afunction of temperature with the positive elongation differences between cooling and heating, coefficient relative elongation with the very small elongation differences between cooling and heating, coefficient the course of derivative as a function of temperature (T) during heating and cooling with the positive elongation differences.
Źródło:
Journal of KONES; 2009, 16, 4; 575-583
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ekspansja islamu w Ruandzie po 1994 roku w świetle teorii sekularyzacji
Expansion of Islam in Rwanda after 1994 in Light of Secularization Theories
Autorzy:
Bachmann, Klaus
Bieniek, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/567070.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie. Instytut Nauk Politycznych
Tematy:
Rwanda
Secularization
Islam expansion
Opis:
The article discusses Islam in Rwanda and three secularization theories: Durkheim's religious supply theory; religious demand theory put forward by Finke and Stark; and proposed by Inglehart -security theory. The research the article is based upon was carried out just before 1994 genocide and in 2001. We seek the answer to whether the 1994 genocide brought about any changes in the religious structure in Rwanda and how relevant the above mentioned theories are in explaining the changes. In the first section, the theoretical background is provided; then the history of Rwanda up to 1994 is briefly discussed; the penultimate section focuses on how Islam spread in Rwanda and finally we examine whether the three secularization theories are relevant in explaining the changes in the Rwandan religious structure.
Źródło:
Forum Politologiczne; 2006, 4 - Islam we współczesnej Afryce; 149-166
1734-1698
Pojawia się w:
Forum Politologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mitologia pogranicza. Australia i Stany Zjednoczone Sygurda Wiśniowskiego
Mythology of a borderland. Sygurd Wiśniowski on Australia and the United States
Autorzy:
Forajter, Wacław
Powiązania:
https://bibliotekanauki.pl/articles/511546.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
borderland
frontier
expansion
modernity
journey
Opis:
The article discusses the concept of ‘borderland’ in selected works by Sygurd Wiśniowski: a 19th century Polish traveller who encountered the territorial and cultural expansion of the white settlers in Australia and North America. The author of the article aims to present both the specificity and the complexity of ‘borderland phenomenon’ as described by Wiśniowski. The author concentrates also on absent or omitted e lements in Wiśniowski’s discourse (which can be observed in his attitude towards the native inhabitants and women) and reveals Wiśniowski’s utopian ideas (such as equality of opportu nity).
Źródło:
Postscriptum Polonistyczne; 2016, 1(17); 23-32
1898-1593
2353-9844
Pojawia się w:
Postscriptum Polonistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing contraction and thermal expansion coefficient of construction and moulding polymer composites
Autorzy:
Pyrzowski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/259644.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
polymer composites
contraction
thermal expansion
Opis:
The paper presents results of systematic tests of contraction and thermal expansion coefficients of materials based on polymer composites. The information on the above material properties is essential both at the design stage and during the use of finished products. Components for the samples were selected in such a way as to represent typical materials used for production of construction and moulding elements. The performed tests made it possible to monitor the analysed parameters at different stages of the technological process.
Źródło:
Polish Maritime Research; 2018, S 1; 151-158
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A characterization of planar median graphs
Autorzy:
Peterin, Iztok
Powiązania:
https://bibliotekanauki.pl/articles/744189.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
median graphs
planar graphs
expansion
Opis:
Median graphs have many interesting properties. One of them is-in connection with triangle free graphs-the recognition complexity. In general the complexity is not very fast, but if we restrict to the planar case the recognition complexity becomes linear. Despite this fact, there is no characterization of planar median graphs in the literature. Here an additional condition is introduced for the convex expansion procedure that characterizes planar median graphs.
Źródło:
Discussiones Mathematicae Graph Theory; 2006, 26, 1; 41-48
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expansion of a cylindrical cavity in sand
Autorzy:
Osinov, V. A.
Cudmani, R.
Powiązania:
https://bibliotekanauki.pl/articles/1954562.pdf
Data publikacji:
2000
Wydawca:
Politechnika Gdańska
Tematy:
cavity expansion
sand
hypoplasticity
critical state
Opis:
The paper presents numerical solution to the problem of the symmetri quasi-static large-strain expansion of a cylindrical cavity in sand. The boundary value problem is solved with the use of a constitutive equation of hypoplasticity calibrated for a particular sand. As the radius of the cavity increases, the stresses and the density on the cavity surface asymptotically approach limit values which correspond to a so-called critical state of the sand. The limit values depend on the initial stresses and the initial density. The solutions are compared with experimental results for the same sand available in the literature. A comparison is also made with numerical solutions obtained by other authors.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2000, 4, 3; 421-437
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the results of the design process performed on the historic architectural structure based on the example of the extension of historical didactic complex in Rzeszów
Autorzy:
Gosztyła, M.
Lichołai, R.
Powiązania:
https://bibliotekanauki.pl/articles/104787.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
historical architectural complex
design
architectural expansion
Opis:
The article analyses the issue of the extension of the historical architectural didactic complex in Poland. The conditions of the building before the design process was described and the adopted design solutions were analyzed. Design works allowed to arrange form of facades. The results of the work is an additional didactic and administrative space. The article analyses the results of cooperation between local delegation of Regional Office of Protection of Historical Monuments and the architect, which allowed to extend the possibilities of historical use of the object in combination with the newly design part.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 4; 121-127
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Swelling, expansion and shrinkage properties of selected clays in the Mazowsze province, central Poland
Autorzy:
Pająk-Komorowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059631.pdf
Data publikacji:
2003
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
tertiary clay
tills
swelling
expansion
shrinkage
Opis:
Tertiary clays and tills, the most widespread soils in Poland, were used for the examination of swelling, expansion and shrinkage properties. Results of laboratory tests and the values of selected parameters obtained by indirect methods show that the Tertiary clays examined, when compared with Quaternary tills, show greater volumetric changes under the influence of water, which is primarily connected with their higher silt content.
Źródło:
Geological Quarterly; 2003, 47, 1; 55-62
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wilgotności powietrza na wielkości decydujące o jakości produktu w procesie termicznego ekspandowania nasion w strumieniu gorącego powietrza
Influence of air humidity on values that decide of product quality in thermal expansion of seeds in a hot air stream
Autorzy:
Konopko, H.
Powiązania:
https://bibliotekanauki.pl/articles/290725.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
ekspandowanie termiczne
nasiona
thermal expansion
seeds
Opis:
W pracy przedstawiono wyniki symulacji komputerowej procesu termicznego ekspandowania nasion prosa w przewodzie pneumatycznym. Świadczą one o znaczącym wpływie początkowej wilgotności nasion na podstawowe parametry procesu.
The study presents the results of computer simulation of the process of thermal expansion of millet seeds in a pneumatic conduit. It shows a considerable influence of initial seed moistness on basic process parameters.
Źródło:
Inżynieria Rolnicza; 2006, R. 10, nr 7(82), 7(82); 269-275
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PixSel : Images as Book Cipher Keys : An Efficient Implementation Using Partial Homophonic Substitution Ciphers
Autorzy:
Shumay, M.
Srivastava, G.
Powiązania:
https://bibliotekanauki.pl/articles/226555.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
book ciphers
ciphertext enlargement
ciphertext expansion
Opis:
In this paper we introduce a novel encryption Technique, which we call PixSel. This technique uses images in place of literature as the book cipher’s key. Conventional book ciphers possess an unwieldy ciphertext enlargement, creating ciphertexts multiple times the length of the plaintext. As well, there is often the issue of a given book not containing the necessary material for the encipherment of some plaintexts. We sought to rectify these nuisances with PixSel, possessing a typical ciphertext enlargement of merely 1% to 20% for text. Using PixSel, there are also no limitations on encipherable data type, given a suitable image.
Źródło:
International Journal of Electronics and Telecommunications; 2018, 64, 2; 151-158
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Imigracja na Hawaje z Japonii w latach 1885–1900
Immigration to Hawaii from Japan in 1885–1900
Autorzy:
Puchacz, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/2142620.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Tematy:
Hawaii
Japan
United States
immigration
expansion
Opis:
In the first half of the 19th century the Kingdom of Hawaii was declared to be a part of the American sphere of influence. Americans and Europeans had a great influence on the country’s internal and foreign policy. They built their position on agriculture, in particular on the cultivation of sugar cane. Due to the lack of local manpower, they brought to Hawaii Asians – the Chinese, and then the Japanese. The Japanese government agreed to emigration of its laborers because of various reasons, including economic problems affecting rural areas. The conditions of their work and life were strictly regulated by the immigration convention concluded in 1886. In the years 1885–1894, 29,000 people came to work on plantations under the contract system. The proclamation of the Republic of Hawaii in 1894, which replaced the overthrown monarchy, coincided with the withdrawal of the government of this state from recruitment and importing workers from Japan. The resulting gap was filled in by Japanese emigre companies that brought not only contract workers but also non-contractual immigrants to Hawaii. The Government of the Republic of Hawaii considered the increased and uncontrolled inflow of the Japanese to be a threat. For this reason, it decided to limit this immigration. The refusal to let hundreds of Japanese enter Hawaii led to an immigration dispute between Tokyo and Honolulu. It contributed to the decision of the United States to annex Hawaii in 1897. Such a step evoked protests from Japan, yet, they were withdrawn at the end of the year, due to the growing competition of the powers in the Far East. The immigration dispute between Hawaii and Japan was finally resolved under the pressure from Washington in 1898, after the republic’s government paid out $75,000 compensation.
Źródło:
Białostockie Teki Historyczne; 2018, 16; 105-128
1425-1930
Pojawia się w:
Białostockie Teki Historyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of a static expansion standard for calibrating medium and high vacuum pressure gauges
Autorzy:
Duarte Franco, Jonathan Javier
Villamizar Mora, Carlos Mauricio
García Sánchez, Carlos Eduardo
Powiązania:
https://bibliotekanauki.pl/articles/1849022.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
static expansion system
calibration
vacuum
characterization
Opis:
The Centro de Desarrollo Tecnológico del Gas developed a static expansion system to enable the calibration of medium and high vacuum pressure gauges in Colombia. The system can generate pressures between 0.1 Pa and 100 kPa. The characterization tests included the evaluation of pressure stability and desorption rate, a trueness test, and the analysis of the uncertainty budget of the calibration result. The pressure stability test was successfully completed and showed the positive effect of baking on the final pressure in the system. The trueness test allowed concluding that the calibration results with the system are comparable with those obtained with a reference meter traceable to a national metrology institute. The uncertainty budget analysis indicated the dominance of the pressure of the unit under calibration and of the initial pressure in the small tank in different pressure ranges on the uncertainty of the result. A comparison with a Monte Carlo simulation led to the conclusion that in this situation, the GUM (Guide to the Expression of Uncertainty in Measurement) method is not ideal for estimating the uncertainty of the results.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 593-604
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 348

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