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    Wyświetlanie 1-41 z 41
    Tytuł:
    A theorem on the convergence of algorithms of static stochastic optimization
    Autorzy:
    Koronacki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/747577.pdf
    Data publikacji:
    1976
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Tematy:
    93E10
    Opis:
    .
    The problem of this paper is to minimize a function f, which is scalar-valued and defined on a finite dimensional vector space. An iterative algorithm is of the form X(n+1)=A(n)(X(n)) and can take the usual form X(n+1)=X(n)−a(n)Y(n), where Y(n) can be as in the Kiefer-Wolfowitz procedure, but an is random. Making use of the theorem on convergence of supermartingales the author gives several theorems on the convergence of the procedure to the minimal point of f.
    Źródło:
    Mathematica Applicanda; 1976, 4, 7
    1730-2668
    2299-4009
    Pojawia się w:
    Mathematica Applicanda
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prace nad specyfikacją jakościową paliwa E10+
    Work on a quality specification for the E10+ fuel
    Autorzy:
    Pałuchowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835309.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    benzyna silnikowa E10+
    Horyzont 2020
    specyfikacja
    petrol E10+
    Horizon 2020
    specification
    Opis:
    W artykule zawarto ogólne informacje o początkach koncepcji zrównoważonego rozwoju gospodarczego i społecznego na świecie oraz o realizacji tej koncepcji w odniesieniu do przemysłu paliwowego. Przedstawiono także informacje o roli normy jakościowej w innowacji gospodarki Unii Europejskiej. W kolejnych częściach zaprezentowano wyniki podjętych dotychczas w UE działań dotyczących paliwa E10+. Przedstawiono przegląd przeprowadzonych badań, których wyniki posłużą do podjęcia odpowiednich decyzji co do dalszych prac nad specyfikacją paliwa E10+, prowadzonych w ramach Programu Horyzont 2020. Podsumowano także prace dotyczące paliwa E10+ prowadzone dotychczas w INiG – PIB.
    This article provides general information about the origins of the concept of sustainable economic and social development in the world and the implementation of this concept in relation to the oil industry. Information on the role of quality standards in the innovation of the European Union economy is also presented. In the following parts, the article presents the results of actions taken so far in the European Union with regard to fuel E10+. It presents also an overview of research performed, the results of which will be used to take appropriate decisions regarding further work on the development of E10+ fuel specifications, under the Programme Horizon 2020. A summary of research work carried out so far in the Oil and Gas Institute – National Research Institute in the field of the E10+ fuel is also presented.
    Źródło:
    Nafta-Gaz; 2017, 73, 10; 799-805
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prężność par butanolu jako komponentu benzyn silnikowych
    Vapour pressure of butanol as a component of gasoline
    Autorzy:
    Rogowska, Delfina
    Powiązania:
    https://bibliotekanauki.pl/articles/1834265.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    benzyna E10
    biobutanol
    liczby blendingowe prężności par
    E10 gasoline
    biobuthanol
    vapour pressure blending numbers
    Opis:
    The policy on motor fuels decarbonizastion results in a steady increase in interest in biofuels. Among them, the most popular gasoline components are ethanol and ETBE ether. However, because of advantageous performance properties and new production technologies of biobuthanol, this gasoline component is gaining importance. During gasoline blending, (bio-)buthanol as well as ethanol shows nonlinear effects in case of many parameters, it is that parameter value calculated based on the share and properties of components that is different than that measured in a laboratory. This applies mainly to such parameters as octane numbers, distillation parameters, vapour pressure. It should be noticed that linear programming is used very often for optimization and production planning, which requires a set to be linear. Having the above in mind, blending numbers (additive mixing factors) are calculated for the above parameters, which reflect “behavior” of a given component in specific component set. In this article, the blending number for vapour pressure of n-buthanol and i–buthanol in combination with other oxygen components and gasoline components for gasoline containing above 2.7% (m/m) of oxygen were assessed. The experiment was planned according to modified Andreson’s and McLean’s methodology of planning of experiments. In order to establish the blending numbers, the “regression” statistical data analysis function, which is a component of Excel sheet Analysis ToolPak, was used. In the set of such components as ethanol, ETBE, buthyl alcohols and hydrocarbon components, the vapor pressure blending number of ethanol is much higher than its real vapor pressure value (98.0 kPa vs 16.1 kPa), the ETBE blending value is lower (the blending number is 15.7, the determinate number is 32.0 kPa). In turn, the established vapour pressure blending value of both n-buthanol and i-buthanol is close to the determinate value (the determinate value for n-buthanlo is 1.3 kPa, the blending number is 2.0 kPa, for i-buthanol the determine value is 2.6 kPa, the blending number is 3.0 kPa).
    Źródło:
    Nafta-Gaz; 2020, 76, 5; 340-348
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Memory Properties of Non-Fully Interconnected Neural Network
    Autorzy:
    Kosiński, R. A.
    Zagórski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1931636.pdf
    Data publikacji:
    1994-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.10.+e
    Opis:
    A model of a neural network consisting of two states neurons with the number N of (symmetric) synaptic connections per neuron treated as a variable was investigated numerically. Hebb's rule was used for storing uncorrelated patterns in the network. A maximal number of such patterns, which can be effectively retrieved by the network and the process of deterioration of the memory, is examined as a function of the number of synaptic connections per neuron. The influence of the number of neurons in the network as well as boundary conditions for the storage capacity of the network are discussed.
    Źródło:
    Acta Physica Polonica A; 1994, 86, 3; 427-433
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-Ray Diffraction and NMR Studies on Mixtures of Non-Ionic Surfactant (C$\text{}_{12}$EO$\text{}_{2}$) and Phospholipids (POPC)
    Autorzy:
    Funari, S. S.
    di Vitta, C.
    Rapp, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964131.pdf
    Data publikacji:
    1997-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.10.+e
    Opis:
    We studied the temperature and concentration dependence of the POPC/C$\text{}_{12}$EO$\text{}_{2}$/water ternary system and identified and characterized the different phases occurring. The thermal behaviour is slightly dependent on the surfactant to lipid molar ratio R$\text{}_{s}\text{}_{/}\text{}_{l}$ . At low surfactant content the behaviour is similar to the binary lipid/water system. Similarly at low lipid contents the system behaves similarly to the surfactant/water mixture. However, at molar ratios R$\text{}_{s}\text{}_{/}\text{}_{l}$ between 2 and 3 a new hexagonal phase forms which is peculiar to the mixture. $\text{}^{2}$H NMR measurements indicated the existence of a lamellar phase containing also curved surfaces additional to the flat ones. The surface area per surfactant molecule was calculated to 0.23 nm$\text{}^{2}$ which is in good agreement with the cross-section of a paraffinic chain.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 5; 953-960
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Odtwarzalność rzeczywista, w testach PT, znormalizowanych procedur badawczych stosowanych w badaniu jakości paliw silnikowych. Część II. Normy czynnościowe stosowane w badaniu jakości benzyny E10
    Real reproducibility, in PT tests, standardized testing procedures used in the analysis of the quality of motor fuels. Part II. Functional standards used in the study of the quality of E10 gasoline
    Autorzy:
    Altkorn, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835454.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    norma czynnościowa
    odtwarzalność
    badania kompetencji
    benzyna z etanolem E10
    functional standard
    reproducibility
    proficiency test
    gasoline with ethanol E10
    Opis:
    Artykuł ma na celu stwierdzenie, czy normatywna odtwarzalność znormalizowanych procedur badawczych, podana w normach czynnościowych badania parametrów jakościowych paliw silnikowych do silników z zapłonem iskrowym, a określona na etapie opracowywania lub nowelizacji norm czynnościowych, jest zgodna z odtwarzalnością rzeczywistą osiąganą w praktyce przez szerokie grono użytkowników danej normy. Oceny w praktyce dokonano poprzez analizę wyników badań międzylaboratoryjnych, przeprowadzanych przez liczną grupę uczestników, w których brały udział laboratoria Zakładu Analiz Naftowych INiG – PIB w latach 2010–2016. Z uwagi na dużą liczbę uczestniczących laboratoriów i różny stopień kompetencji uzyskana przez nie odtwarzalność rzeczywista ma wysoką wartość statystyczną. Część I opisuje problemy, które mogą wystąpić podczas organizacji badania kompetencji laboratoriów. Przedyskutowano odtwarzalność znormalizowanych metod sprawdzanych w toku badań kompetencji laboratoriów w celu porównania jej z wartością rzeczywistą uzyskaną przez uczestników tych badań kompetencji. Wykonano analizę danych aktualnych (2016) oraz historycznych z lat 2010–2015, odnosząc odtwarzalność uzyskaną przez grupę uczestników badań międzylaboratoryjnych do odtwarzalności normatywnej dla odpowiednich metod badawczych.
    The article aims to determine whether the operational reproducibility of standardized testing procedures specified in the standards of functional testing of quality parameters of gasoline with ethanol E10, and determined at the stage of development or amendment of codes of practice, is consistent with the real reproducibility and what is achieved in practice by a wide circle of users of the standard. Practical assessment was done by analyzing the results of interlaboratory tests carried out with the participation of a very large group of participants, amongst them the laboratories of the Department of Analysis of Petroleum Oil and Gas Institute – National Research Institute in 2010–2016. Due to the large number of participating laboratories and different degrees of proficiency, the actual reproducibility obtained by them has a high statistical value. Part I describes the problems that may occur during the organization of proficiency testing of laboratories. The reproducibility of standardized methods were checked during proficiency testing of laboratories, in order to compare it with the actual value obtained by participants in the proficiency test of laboratories. We analyzed actual (2016) and historical data from the years 2010–2016, regarding the reproducibility achieved by a group of participants of proficiency interlaboratory tests with respect to normative reproducibility for the relevant test methods.
    Źródło:
    Nafta-Gaz; 2017, 73, 6; 446-452
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of knock suppression characteristics in a boosted methane : gasoline blended fuelled SI engine
    Autorzy:
    Yang, Z.
    Miganakallu, N.
    Rao, S.
    Harsulkar, J.
    Naber, J.
    Lonari, Y.
    Szwaja, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/244629.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    knock
    methane
    gasoline
    E10
    blend fuel
    knock onset prediction
    simulation
    Opis:
    Natural gas has a higher knock suppression effect than gasoline which makes it possible to operate at higher compression ratio and higher loads resulting in increased thermal efficiency in a spark ignition engine However, using port fuel injected natural gas instead of gasoline reduces the volumetric efficiency from the standpoints of the charge displacement of the gaseous fuel and the charge cooling that occurs from liquid fuels. This article investigates the combustion and engine performance characteristics by utilizing experimental and simulation methods varying the natural gas-gasoline blending ratio at constant engine speed, load, and knock level. The experimental tests were conducted on a single cylinder prototype spark ignited engine equipped with two fuel systems: (i) a Direct Injection system for gasoline and (ii) a Port Fuel Injection (PFI) system for compressed natural gas. For the fuels, gasoline with 10% ethanol by volume (commercially known as E10) with a research octane number of 91.7 is used for gasoline via the DI system, while methane is injected through PFI system. The knock suppression tests were conducted at 1500 rpm, 12 bar net indicated mean effective pressure wherein the engine was boosted using compressed air. At 60% of blending methane with E10 gasoline, the results show high knock suppression. The net indicated specific fuel consumption is 7% lower, but the volumetric efficiency is 7% lower compared to E10 gasoline only condition. A knock prediction model was calibrated in the 1-D simulation software GT-Power by Gamma Technologies. The calibration was conducted by correlating the simulated engine knock onset with the experimental results. The simulation results show its capability to predict knock onset at various fuel blending ratios.
    Źródło:
    Journal of KONES; 2018, 25, 3; 517-525
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intrinsic Rhythmic Fluctuation of Membrane Voltage Evoked by Membrane Noise in the Hodgkin-Huxley System
    Autorzy:
    Kuang, S.
    Wang, J.
    Zeng, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538607.pdf
    Data publikacji:
    2010-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    05.45.-a
    87.10.-e
    Opis:
    We study the influence of membrane noise on the fluctuations of membrane voltage in the Hodgkin-Huxley neuronal system for the giant axon of squids. We find that the resting potentials of membrane patches in the absence of any external stimulus, exhibit apparent rhythmic fluctuation behaviors. The intrinsic fluctuation frequencies of membrane voltage, due to channel noise, thermal noise, or both, roughly share the same frequency ranges, despite that the fluctuations arisen from the former noise are overwhelmingly larger in amplitude than that from the latter. We also show that the rhythmic fluctuations can help enhance the encoding of weak signals within the rhythmic frequencies ranges and thus contribute positively to the information processing in the nervous system.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 3; 435-438
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chaotic Dynamics of a Linear Chain of Periodically Stimulated Neurons with Random Synaptic Connections
    Autorzy:
    Kosiński, R. A.
    Krawiecki, A.
    Sukiennicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027444.pdf
    Data publikacji:
    2001-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.10.+e
    05.45.-a
    Opis:
    Dynamics of a neural network in the form of a linear chain of artificial neurons S$\text{}_{i}$∈(-1,1) influenced by an external sinusoidal stimulation is investigated as a function of the range k of synaptic connections with random values. Time evolution of the network is periodic for small k, however, clusters of neurons oscillating with a triple period of external stimulation, with quasiperiodic or with chaotic time evolution may occur. For increasing k the number and width of the chaotic clusters increase and for k >4 the chaotic motion occurs in the whole network. A route to chaos in the considered system is discussed.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 1; 89-99
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The SIRS Model of Epidemic Spreading in Virtual Society
    Autorzy:
    Grabowski, A.
    Kosiński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812230.pdf
    Data publikacji:
    2008-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    89.75.-k
    89.65.-s
    87.10.-e
    Opis:
    The phenomenon of epidemic spreading in a real social network is described and investigated numerically. On the basis of data concerning amount of time devoted daily to social interactions, the influence of human activity on spreading process is investigated in the frame of SIRS model. It was found that the activity of an individual is positively correlated with its connectivity and the relation has power law form. The influence of control measures on the spreading process is investigated as a function of initial conditions. The cost-effectiveness of mass immunizations campaigns and target vaccinations is compared. It was found that the form of activity distribution has significant influence on the spreading phenomena in the network.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 3; 589-596
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problems associated with transferring of engineering to small scale - towards theoretical nanotechnology
    Autorzy:
    Kaczmarek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1058811.pdf
    Data publikacji:
    2016-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    31.10.+z
    12.60.-i
    12.90.+b
    14.80.-j
    87.10.-e
    Opis:
    This paper is seen as a review of attempts carried out by author in order to indicate problems related to transferring of engineering to smaller scales having in mind theoretical aspects. Two main problems are indicated. The first one is associated with question what kind of theory is appropriate for realization of design of devices and processes related to smaller scales including nanoscale. The second problem is related to determination of source of precision which is necessary for realization of the design. Solution of both problems needs elaboration of appropriate theories. One indicates that unified mechanics of materials based on collection of dynamical systems with dimensional reduction is appropriate for future realization of the design process. This is multi-scale description which unifies discrete models related to atomic scale, including molecular dynamics, and more averaged continuum descriptions. In order to determine corresponding source of precision for small scale processes the vacuum medium mechanics is introduced. Within vacuum medium mechanics we are able to determine attractor, expressed on the most fundamental elementary particle level, and responsible for self-organization manifested in molecular processes. Vacuum medium mechanics is considered as fundamental theory. Therefore we should estimate to what degree such a theory is stable with respect to large set of experimental results. In particular one investigates consequences of vacuum medium mechanics for theoretical biology. One accentuates that mechanisms of biological evolution and source of precision for nanotechnology expressed by means of vacuum medium mechanics are interrelated. Theoretical biology and nanotechnology should be described in consistent way in order to cooperate in a future. Both theories: unified mechanics of materials and vacuum medium mechanics are seen as basis for further development of theoretical nanotechnology.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 6; 1295-1323
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Braids for Pretzel Knots
    Autorzy:
    Suffczyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2014522.pdf
    Data publikacji:
    2000-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.10.+e
    36.20.-r
    87.15.-v
    02.40.-k
    Opis:
    The words of braid closures for the pretzel knots, in particular the twist knots relevant to molecular supercoils in biochemistry, are recorded in a standardized form, which enables one to see the regular pattern of the words, and thus to write the braid words representing pretzel knots for general values of the crossing number.
    Źródło:
    Acta Physica Polonica A; 2000, 98, 6; 663-671
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibilities to monitoring-control of the horse-chestnut leafminer [Cameraria ohridella] with some acetal derivatives of [8E,10Z]-tetradeca-8,10-dienal
    Autorzy:
    Grodner, J
    Jablonski, T.
    Kolk, A.
    Przybysz, E.
    Slusarski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/55153.pdf
    Data publikacji:
    2008
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    Cameraria ohridella
    Polska
    Mazovia region
    attractant
    mating disruption
    pheromone trapping technique
    population control
    acetal derivative
    horse chestnut leafminer
    [8E,10Z]-tetradeca-8,10-dienal
    Aesculus hippocastanum
    population monitoring
    Opis:
    This paper shows possibility of utilization ether derivatives of (8E,10Z)-tetradeca-8,10-dienal [2-((7E,9Z)-trideca-7,9-dienyl)-1,3-dioxan (2) and 2-((7E,9Z)-trideca-7,9-dienyl)-4-hydroxy-6-heptyl-5-hexyl-1,3-dioxan (3)] as potential lures for monitoring of horse-chestnut leafminer population. The both propheromones were synthesized at the Institute of Industrial Organic Chemistry (IPO) and then tested in 2006/07 on field trials at several different sites on terrain of Mazovian province. Within the scope of these investigations, acetal 2 was checked at different doses (10, 100, 500 μg) by the pheromone trapping technique, and aldoxane 3 was used both in pheromone trapping (at the dose 50 μg) and mating disruption technique. The good attractiveness properties were obtained for both tested compounds. However, the dose of 2-((7E,9Z)-trideca-7,9-dienyl)-1,3-dioxan had to be a 10 times higher than dose of aldoxane for the same good activity.
    Źródło:
    Pestycydy; 2008, 3-4; 5-13
    0208-8703
    Pojawia się w:
    Pestycydy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uwarunkowania polskiej polityki gospodarczej po roku 2022
    Determinants of the Polish economic policy after 2022
    Autorzy:
    Banaszyk, Piotr
    Gorynia, Marian
    Powiązania:
    https://bibliotekanauki.pl/articles/2120166.pdf
    Data publikacji:
    2022-06-30
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Polish economy
    economic policy in Poland
    determinants of economic activity in the world
    JEL codes: B10, E02, F20, F40, F60
    polska gospodarka
    polityka gospodarcza w Polsce
    uwarunkowania działalności gospodarczej na świecie
    JEL: B10, E02, F20, F40, F60
    Opis:
    W artykule skupiono się na wskazaniu pożądanych kierunków polityki gospodarczej w Polsce na tle jej potencjału i aktualnych uwarunkowań. Założono, że stan polskiej gospodarki jest zdeterminowany współoddziaływaniem procesów transformacji, globalizacji i integracji europejskiej. Ostatnie chronologicznie determinanty tego stanu to kryzys wywołany pandemią COVID-19 oraz agresja wojenna Rosji na Ukrainę. Wydarzenia te stworzyły zagrożenie stagflacją. Rosnące znaczenie Chin i wojna handlowa tego państwa z USA wraz z rosyjską agresją kruszą dotychczasowy międzynarodowy ład ekonomiczny. Procesy te zmieniają sytuację i perspektywy polskiej gospodarki, której sternicy powinni na nowo zdefiniować jej miejsce w nowym międzynarodowym ładzie gospodarczym, stopniowo wyłaniającym się pod wpływem tych wszystkich okoliczności. Niewiadomą jest finalny obraz następnej rzeczywistości gospodarczej. Jednak warto już teraz dążyć do włączenia polskich przedsiębiorstw w europejskie i światowe łańcuchy dostaw dzięki modernizacji technologicznej ich działalności. W obszarze polityki fiskalnej zamiast konkurować coraz niższymi stawkami i obciążeniami podatkowymi warto rozbudowywać infrastrukturę i instytucje publiczne. W odniesieniu do polityki monetarnej z powodu nieuchronnego wzrostu ryzyka ekonomicznego inwestycji zagranicznych w Polsce warto przyjąć euro i dzięki temu stworzyć bezpieczną perspektywę rozwoju gospodarczego.
    The article focuses on indicating the desired directions of economic policy in Poland against the background of its potential and current conditions. It is assumed that the current condition of the Polish economy was determined by the interaction of the processes of transformation, privatization, globalization and European integration. The last chronological determinants of this state are the crisis caused by the COVID-19 pandemic and Russia’s military aggression against Ukraine. These impacts created the threat of stagflation. The growing importance of China and the trade war between that country and the US, together with Russian aggression, are crushing the current international economic order. These processes are changing the situation and prospects of the Polish economy, whose managers should redefine its place in the new international economic order that is gradually emerging under the influence of all these circumstances. The final picture of the next economic reality is unknown. However, it is worth striving to include Polish enterprises in European and global supply chains thanks to the technological modernization of their activities. In the area of fiscal policy, instead of competing with ever lower tax rates, it is worth developing public infrastructure and institutions. With regard to monetary policy, due to the inevitable increase in the economic risk of foreign investments in Poland, it will be a good idea to adopt the euro and thus create a safe prospect for economic development.
    Źródło:
    Ruch Prawniczy, Ekonomiczny i Socjologiczny; 2022, 84, 2; 149-161
    0035-9629
    2543-9170
    Pojawia się w:
    Ruch Prawniczy, Ekonomiczny i Socjologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czochralski-Grown Silicon Crystals for Microelectronics
    Autorzy:
    Bukowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399431.pdf
    Data publikacji:
    2013-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.10.Fq
    85.40.-e
    Opis:
    The Czochralski method of crystal growth is used since 1950s in scientific and industrial laboratories for growth of single crystals of large size and high quality. The article presents the general characteristics and selected improvements of the Czochralski method, and discusses its meaning and advantages in growth of silicon single crystals playing a key role in microelectronics.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 2; 235-238
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal Calculation of Ground Contact Structures: New Methods Based on Parametrized Transient Finite Element Thermal Modeling
    Autorzy:
    Nagy, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401954.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    44.05.+e
    44.10.+i
    Opis:
    The heat loss at ground contact structures is taken into consideration in building heat loss calculations. However, it implies uncertainties due to the physical properties of the soil as well as the building structure. In this paper, new methods are introduced for calculating the heat loss at ground contact structures. Firstly, it examines the presently used and general calculation methods and their shortcomings. Then a simple-to-use method based on thousands of results of parametrized transient finite element thermal models is shown. In this research, the calculations take the middle-eastern European climate conditions, geothermal gradient and soil properties as well as the relevant harmonized EU standards into account. The equivalent linear heat transfer coefficients, which in this method also contain the effects of thermal bridges, occurring in various conditions are summarized in a table and can be calculated by new formulae also shown in the paper using condition-dependent constants, the ground floor's heat transfer coefficient and the length between the floor and ground level.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-164-B-166
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Scattering of Positrons and Positronium by Atoms in the Close-Coupling Approximation
    Autorzy:
    Hewitt, R. N.
    Noble, C. J.
    Bransdfen, B. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933490.pdf
    Data publikacji:
    1995-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.10.-k
    34.70.+e
    Opis:
    We present some recent results obtained within the close-coupling approximation for both positron and positronium scattering by atoms. We begin by discussing a generalization of the method of Vincent and Phatak to study the formation of Ps- in Ps collisions with H(1s) in a simplified model. The important result of this calculation is that the overall Coulomb interaction which is present in the rearrangement channel is treated exactly. We also present results for positronium formation and ionization for positron scattering by argon atoms. The present calculations are for transitions from the Αr(3s$\text{}^{2}$) subshell and show the importance of the coupling to the continuum.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 1; 139-145
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antihydrogen Formation in Low Energy Collision of Positron with Antiproton
    Autorzy:
    Bhattacharyya, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1931542.pdf
    Data publikacji:
    1994-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    34.50.+a
    34.70.+e
    39.10.+x
    Opis:
    In the present paper two-body radiative recombination rate for the production of antihydrogen (H̅) in a merged beam of slow positrons (e$\text{}^{+}$) and antiprotons (p¯) is studied in the light of a two-step process, which consists of capture in an excited state of H̅ with subsequent decay to the ground state and emission of a photon. Computation is done using the field theory and the Coulomb gauge. Importance of the two-step radiative recombination process relative to the well-known spontaneous photorecombination process, on the two-body radiative recombination rate for antihydrogen formation, is discussed. The present result predicts higher contribution from the two-step radiative recombination process as compared to the spontaneous photorecombination process to the rate of cold antihydrogen formation with the relative collision energy below 0.01 Rydberg, near which experiments are being conducted. However, above 0.1 Rydberg the spontaneous photorecombination process dominates over the two-step radiative recombination process. The present result is valid, as well, for the formation of hydrogen atom due to collision between slow electron and proton.
    Źródło:
    Acta Physica Polonica A; 1994, 86, 3; 297-308
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Phase Change Materials on Time Lag, Decrement Factor and Heat-Saving
    Autorzy:
    Bilgin, F.
    Arici, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031295.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    44.05.+e
    88.10.cn
    88.40.-j
    Opis:
    In this study, the effect of phase change materials on the time lag, decrement factor and heat-saving is examined numerically. The calculations are conducted for four different cities located at different climatic zones in Turkey, considering both summer and winter conditions, in order to explore the potential heating and cooling energy savings by employing phase change materials. A solar-air temperature, which is a function of time and solar radiation, was taken into consideration as external boundary condition for each city. The results of the present study show that employment of phase change materials in walls of the buildings has a pronounced effect on the time lag and decrement factor. It is concluded that a significant amount of heating energy can be saved and thermal comfort can be enhanced considerably by incorporating phase change materials into external walls. However, a proper phase change material must be selected, considering different climatic conditions.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1102-1105
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fundamental Gaps in $Cr_{8}$, $Cr_{7}Ni$ and $Cr_{7}Cd$ Molecules
    Autorzy:
    Brzostowski, B.
    Wojciechowski, M.
    Kamieniarz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1368520.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    31.15.E-
    71.10.-w
    Opis:
    In this paper we investigate fundamental gaps of three octametallic Cr-based molecular rings $Cr_{8}F_{8}(Piv)_{16}$, $Cr_{7}NiF_{8}(Piv)_{16}$ and $Cr_{7}CdF_{8}(Piv)_{16}$ using the SIESTA package. We find that for the ground-state antiferromagnetic configurations, the gap of the homometallic ring is significantly higher than those of the heterometallic rings. In addition, the HOMO and LUMO orbitals are plotted and discussed.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 234-235
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analtyczne problemy ilościowego oznaczania witamin A, E, koenzymu Q10 i kwasu liponowego w próbkach biologicznych
    Autorzy:
    Turkowicz, M. J.
    Karpińska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/274514.pdf
    Data publikacji:
    2011
    Wydawca:
    Roble
    Tematy:
    witamina A
    witamina E
    koenzym Q10
    kwas liponowy
    analiza ilościowa
    vitamin A
    vitamin E
    coenzyme Q10
    lipoic acid
    quantitative analysis
    Źródło:
    LAB Laboratoria, Aparatura, Badania; 2011, 16, 4; 24-32
    1427-5619
    Pojawia się w:
    LAB Laboratoria, Aparatura, Badania
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polypropylene Films Studied with Variable Positron Beams
    Autorzy:
    Dębowska, M.
    Coleman, P. G.
    Gidley, D. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2007958.pdf
    Data publikacji:
    1999-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.10.Dr
    61.41.+e
    71.60.+z
    78.70.Bj
    Opis:
    Doppler broadening and positron lifetime spectra have been measured for polypropylene films of constant thickness (≈ 50 μm) and different morphology that crystallized from melt at temperature 0, 100, and 120°C. The S -parameter vs. energy curves do not change in a systematic way with crystallinity of samples. It is supposed that decrease in the fractional free volume for samples of greater crystallinity is not seen in S-values because of their increase resulting from annihilation in defects present both in the crystalline regions and on the lamellae surfaces. Intensities of the components in the positron lifetime spectra: I$\text{}_{2}$ (τ$\text{}_{2}$=1.3 ns) and I$\text{}_{3}$ (τ$\text{}_{3}$≈ 2.3÷2.8 ns) show changes with crystallinity of samples. The evident trend is observed for the longer-lived τ$\text{}_{3}$-component intensity to decrease with crystallinity while the reverse is true for the shorter, fixed τ$\text{}_{2}$-component. The decrease in the intensity of the longer-lived component can result from reduction of the fractional free volume.
    Źródło:
    Acta Physica Polonica A; 1999, 95, 4; 496-504
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phototermal Spectra of Inhomogeneous Coatings
    Autorzy:
    Popovic, M.
    Galovic, S.
    Stojanovic, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791218.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.62.Eh
    44.05.+e
    44.10.+i
    68.60.Dv
    Opis:
    In this paper we demonstrate a theoretical study for photothermal measurements on inhomogeneous coatings. First, a general photothermal mathematical model for thermal gradient materials is presented. Then, we discuss the effects of inhomogeneous thermal properties in photothermal amplitude and phase spectra of coatings. Finally, a method for quantitative depth profiling that makes use of prior knowledge about the type of profile existing in a sample to reduce the instabilities associated with the mathematically ill conditioned task is demonstrated.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 535-537
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vapour Absorption in Melamine-Formaldehyde Resin
    Autorzy:
    Wawryszczuk, J.
    Ciesielski, K.
    Goworek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2025738.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    36.10.Dr
    61.41.+e
    66.30.-h
    Opis:
    The effects of vapour absorption on positron annihilation in cross-linked polymer were investigated. Contrary to linear polymers, absorption of vapour in cross-linked resin leads to the shortening of o-Ps lifetime. In vacuum absorbed molecules diffuse out. At room temperature desorption of hexane and hexanol is not complete; full elimination of absorbed molecules requires sample temperature increase.
    Źródło:
    Acta Physica Polonica A; 2001, 99, 3-4; 523-528
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    E2F site in the essential promoter region does not confer S phase-specific transcription of the ABCC10 gene in human prostate cancer cells
    Autorzy:
    Dabrowska, Magdalena
    Sirotnak, Francis
    Powiązania:
    https://bibliotekanauki.pl/articles/1038667.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    ABCC10
    MRP7
    E2F
    p107
    RBL1
    cell cycle
    non-classical E2F target gene
    Opis:
    ABCC10 (MRP7) plays a role in cellular detoxification and resistance to anticancer drugs. Since ABCC10 gene transcription in human prostate cancer CWR22Rv1 cells was found dependent on E2F binding sequence motif, ABCC10 expression in G1 and S phases of the cell cycle of CWR22Rv1 cells, was analyzed. The cells were synchronized in G1 phase by double thymidine block and in S phase by thymidine/mimosine double block. ABCC10 mRNA level was found to be similar in S phase-synchronized and asynchronous cell populations. In G1 phase it decreased by 2.4- to 3-fold. It is thus inferred, that ABCC10 expression in CWR22Rv1 cells is not S phase-specific but is primarily associated with cell proliferation.
    Źródło:
    Acta Biochimica Polonica; 2017, 64, 2; 371-374
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Finite-Element Flash Method for Measuring Thermal Conductivity of Liquid
    Autorzy:
    Mamczur, J.
    Wasilewski, A.
    Więcek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402572.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    44.05.+e
    44.10.+i
    07.05.Tp
    02.70.Dh
    02.60.Ed
    Opis:
    A laser beam is used to heat a portion of liquid closed in a vessel from the top of it to avoid convection. The temperature is measured at the bottom of the vessel by a laser waveguide sensor. The heating and measuring methods allow using a small amount of liquid of the order of a milliliter fraction. The heat flow through the liquid as well as the surrounding vessel and space is modeled by the finite-element method to calculate the temperature at the bottom vs. time. Thus obtained dependence is used then as a fitting function to get the liquid thermal conductivity among some other fitting parameters.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2; 193-195
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Five-Layered ZrO₂ and Single-Layered Ce, Eu, and Dy-Doped ZrO₂ Thin Films Prepared by Sol-Gel Spin Coating Method
    Autorzy:
    Çiçek Bezir, N.
    Evcin, A.
    Kayali, R.
    Özen, M.
    Esen, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031178.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.-d
    68.55-a
    68.60-p
    78.20.-e
    81.10.Dn
    71.20.Be
    Opis:
    In order to investigate the influence of the number of layers on the properties of ZrO₂ thin films, we prepared one pure ZrO₂ film sample with five layers and Ce, Eu, and Dy-doped ZrO₂ samples with single layer, by spin-coating sol gel-method. The crystal structures of thin films were determined using X-ray diffraction, morphology of the samples was analyzed by scanning electron microscopy, and the optical properties of the samples were determined by ultraviolet/visible absorbance measurements. The results of these measurements have shown that the concentration of the dopants and the thickness of thin film layers play a vital role in the physical, chemical, and optical properties of the pure and doped ZrO₂ thin films.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 612-616
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First-Principles Study of Structural, Elastic and Mechanical Properties of Zinc-Blende Boron Nitride (B3-BN)
    Autorzy:
    Daoud, S.
    Loucif, K.
    Bioud, N.
    Lebgaa, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419742.pdf
    Data publikacji:
    2012-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    45.10.-b
    62.20.D-
    61.66.-f
    62.20.de
    81.40.Jj
    31.15.E-
    Opis:
    First principles study of structural, elastic properties and anisotropy effect on the mechanical parameters of the zinc-blende boron nitride has been performed using the pseudopotential plane wave method based on density functional theory with the Teter and Pade exchange-correlation functional of the local density approximation. The equilibrium lattice constant, molecular and crystal densities, bond length, the independent elastic constants, bulk modulus and its pressure derivatives, compressibility, shear modulus, internal strain parameter, isotropy factor, compliance constants, the Debye temperature, Young's modulus, Poisson's ratio, the Lamé constants and sound velocity for directions within the important crystallographic planes of this compound are obtained and analyzed in comparison with the available theoretical data reported in the literature.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 1; 109-115
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single Pulse Laser Ablation of AISI 316L Stainless Steel Surface Using Nd:YAG Laser Irradiation
    Autorzy:
    Demir, P.
    Kacar, E.
    Akman, E.
    Demir, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1195232.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.62.-b
    44.05.+e
    44.10.+i
    61.82.-d
    61.82.Bg
    79.20.Eb
    Opis:
    The interaction of single-pulse Nd:YAG laser, operating at 1064 nm wavelength and 6 ns pulse duration, with AISI 316L stainless steel target surface was investigated experimentally and theoretically. Surface modification of stainless steel using laser irradiation was studied by observing the effects of varying incident laser pulse intensities on surface morphology. Surface structure of laser treated stainless steel was determined by optical microscopy and profilometry analyses. Numerical calculation by heat transfer equation was performed for single laser pulse irradiation. The results, obtained by theoretical and experimental processes, of the interaction between single-pulse Nd:YAG laser irradiation and AISI 316L stainless steel target surface are reported.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 439-441
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Pure and Doped TiO₂ Thin Films Prepared by Sol-Gel Spin-Coating Method
    Autorzy:
    Çiçek Bezir, N.
    Evcin, A.
    Kayali, R.
    Özen, M.
    Balyaci, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031525.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.-d
    68.55.-a
    68.60.-p
    78.20.-e
    81.10.Dn
    71.20.Be
    Opis:
    In this study, using spin-coating sol-gel method we fabricated TiO₂ thin films, doped with different concentrations (1, 2, and 3 mole %) of Ce, Dy, and Eu. Characterization of the prepared samples was performed by means of the X-ray diffraction, scanning electron microscopy, ultraviolet visible absorption, and differential thermal and thermo gravimetric analysis. X-ray diffraction measurements have shown that in Eu and Dy-doped samples crystal structure consists of mixed rutile and the dominant anatase phases, however the Ce doped samples consist of anatase phase only. Scanning electron microscopy images have revealed that while average thin film thickness of the Dy-doped samples decreases with increasing concentration of Dy, the average film thicknesses of samples doped with Ce and Eu increases with increasing concentrations of these dopants. Ultraviolet visible absorption spectroscopy measurements have shown that while absorbances of the samples doped by 1 and 2 mole % of the dopants have nearly similar properties, these properties differ from each other for 3 mole % of the dopants. Finally, differential thermal and thermo gravimetric analyses have shown that the chemical reactions and weight losses of the samples have occurred at the expected temperatures.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 620-624
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DFT Estimation of Exchange Coupling Constant of Cr₈ Molecular Ring using the Hybrid Functional B3LYP
    Autorzy:
    Wojciechowski, M.
    Brzostowski, B.
    Kamieniarz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386209.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Xx
    71.15.Mb
    73.22.-f
    75.30.Et
    31.15.E-
    71.10.-w
    Opis:
    A study of electronic and magnetic properties of an octametallic chromium-based homonuclear molecule Cr₈F₈(CO₂-C(CH₃)₃)₁₆ is presented, using density functional theory (DFT) approach and linearized augmented plane wave (LAPW) method with Perdew, Burke and Ernzerhof (PBE) and Becke 3-term correlation (B3LYP) functionals. The exchange coupling parameters between transition metals ions are extracted, taking into account two different (ferro- and antiferromagnetic) spin configurations. The value J=3.1 meV found for the hybrid B3LYP functional improves significantly the one obtained for the PBE functional and gives an evidence for the superiority of the former in simulation of molecular nanomgnets. Moreover, the hybrid functional yields excellent spin density localisation, an enhancement of the HOMO-LUMO gaps and the value 2.81 $μ_B$ of magnetic moment at the chromium centre in good agreement with experiment.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 407-409
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mapping of the DFT Spin Configuration Energies of Cr8Cd Molecular Ring onto the Energy Structure of Falicov-Kimball Model
    Autorzy:
    Wojciechowski, M.
    Brzostowski, B.
    Lemański, R.
    Kamieniarz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386266.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Xx
    71.15.Mb
    73.22.-f
    75.30.Et
    31.15.E-
    71.10.-w
    Opis:
    A comprehensive study of electronic and magnetic properties of a recently synthesized nonametalic chromium-based heteronuclear molecule Cr₈CdF₉(O₂C-C(CH₃)₃)₁₈ is presented, using DFT and Falicov-Kimball (FK) model approach. The magnetic moments are calculated and the spin charge density map is discussed. The exchange coupling parameters between transition metals ions are extracted, taking into account all the nonequivalent spin configurations. It is demonstrated that the energies of the spin configurations can be reproduced by the FK model with a set of parameters consistent with that for the parent Cr8 molecule. For molecular ring considered, the ground state corresponds to the antiferromagnetic configuration and the ferromagnetic configuration yields the highest energy.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 410-412
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composition and Structure of Czochralski Silicon Implanted with $H_{2}^{+}$ and Annealed under Enhanced Hydrostatic Pressure
    Autorzy:
    Kulik, M.
    Kobzev, A.
    Misiuk, A.
    Wierzchowski, W.
    Wieteska, K.
    Bak-Misiuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538976.pdf
    Data publikacji:
    2010-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.U-
    61.72.uf
    66.10.C-
    61.80.Jh
    81.20.-n
    82.80.Yc
    85.40.-e
    Opis:
    Depth distribution of implanted species and microstructure of oxygen-containing Czochralski grown silicon (Cz-Si) implanted with light ions (such as $H^{+}$) are strongly influenced by hydrostatic pressure applied during the post-implantation treatment. Composition and structure of Si:H prepared by implantation of Cz-Si with $H_{2}^{+}$; fluence D = 1.7 × $10^{17} cm^{-2}$, energy E = 50 keV (projected range of $H_{2}^{+}$, $R_{p}(H)$ = 275 nm), processed at up to 923 K under Ar pressure up to 1.2 GPa for up to 10 h, were investigated by elastic recoil detection Rutherford backscattering methods and the depths distributions of implanted hydrogen and also carbon, oxygen and silicon in the near surface were determined for all samples. The defect structure of Si:H was also investigated by synchrotron diffraction topography at HASYLAB (Germany). High sensitivity to strain associated with small inclusions and dislocation loops was provided by monochromatic (λ = 0.1115 nm) beam topography. High resolution X-ray diffraction was also used.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 2; 332-335
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The rank of climatic oscillations during MIS 11c (OHO and YHO) and post-interglacial cooling during MIS 11b and MIS 11a in eastern Poland
    Autorzy:
    Hrynowiecka, Anna
    Żarski, Marcin
    Drzewicki, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/2058672.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    substages of MIS 11
    Mazovian interglacial
    Holsteinian Interglacial
    MIS 12 and MIS 10 glaciation range
    palaeoclimate changes
    E Poland palaeolakeland
    Carbon isotope
    Opis:
    Lacustrine sediments representing Marine Isotope Stage 11 (MIS 11) were found in Hermanów (SE Poland) in a present-day closed depression under a thin cover of Weichselian and Holocene deposits (1.4 m). These sediments filled a palaeolake created as a result of melting of a dead-ice block at the end of MIS 12. Geological research has excluded the presence of an ice sheet during MIS 12 in this area. The lobe of the ice sheet of this glaciation was located several kilometres to the west of Hermanów. The palaeolake was part of a larger palaeolakeland in southeastern Poland, formed during MIS 11. The palaeomorphology of this interglacial is evident in the contemporary relief of the area and the outline of the lakes corresponds to the pattern of the closed palaeodepressions. Based on the record of sediments from Hermanów, a new perspective regarding the sub-division of MIS 11 is presented. Two regressive phases are observed in the Holsteinian Interglacial (MIS 11c) - OHO and YHO. The subsequent substages with five cold fluctuations according to the newest stratigraphic standards should be assigned to MIS 11b with a very clear cooling and a slightly warmer MIS 11a. Carbon isotopic composition of organic matter corroborates geological and environmental analysis. The isotopic composition suggests two cooling periods: OHO and MIS 11b. Stable climatic conditions with little temperature fluctuations persisted between the cooling periods.
    Źródło:
    Geological Quarterly; 2019, 63, 2; 375--394
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Puchacz z Częstochowy. Porucznik pilot Hieronim Dudwał (1913–1940)
    The Eagle Owl from Częstochowa. Lieutenant Pilot Hieronim Dudwał (1913–1940)
    Ein Uhu aus Tschenstochau. Fliegerleutnant Hieronim Dudwał (1913–1940)
    Autorzy:
    Śliżewski, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/2158887.pdf
    Data publikacji:
    2022-11-28
    Wydawca:
    Wojskowe Biuro Historyczne
    Tematy:
    Polish Air Force in France 1940
    Air Force Cadet Offi cer’s School in Dęblin
    113 Fighter Escadrille
    Pursuit Brigade
    GC II/10
    Bajan List
    aerial victories
    Virtuti Militari
    Częstochowa
    Aubérive
    Hieronim Dudwał
    Polish Airforce
    Polnische Luftstreitkräfte
    Polnische Luft streitkräft e in Frankreich 1940
    Kadettenschule der Luft streitkräft e
    113. Jagdstaff el
    Verfolgungsbrigade
    Bajan-Liste
    Luft siege
    Tschenstochau
    Polskie Lotnictwo Wojskowe
    polskie lotnictwo we Francji 1940
    Szkoła Podchorążych Lotnictwa
    113 Eskadra Myśliwska
    Brygada Pościgowa
    lista Bajana
    zwycięstwa powietrzne
    Opis:
    Pochodzący z Częstochowy por. Hieronim Dudwał był jednym z najskuteczniejszych pilotów początkowego okresu II wojny światowej. Absolwent dęblińskiej Szkoły Podchorążych Lotnictwa wszystkie cztery zwycięstwa powietrzne odniósł podczas walk na polskim niebie w 1939 r. Sukces ten jest tym większy, że młody pilot używał sprzętu mniej zaawansowanego technicznie niż ten, który stosował przeciwnik. Po ewakuacji do Rumunii szybko, bo w trzy tygodnie, przedostał się koleją do Francji. W odtworzonym u boku sojusznika lotnictwie znalazł się w kadrowym I DM, ale jednostka ta nie weszła w całości do akcji. Po ataku z 10 maja 1940 r. podzielono ją na klucze i przydzielono zarówno do jednostek frontowych, jak i patroli chroniących przed atakami Luftwaffe miasta związane z francuską produkcją zbrojeniową. Na początku czerwca Hieronim Dudwał został skierowany do operującej na froncie GC II/10. 7 czerwca, podczas walki z przeważającą liczbą samolotów przeciwnika, 27-letni oficer został zestrzelony i zginął, rozbijając się w lesie o nazwie La Marre. Spoczywa na cmentarzu żołnierzy polskich w Aubérive. Pośmiertnie był odznaczony Krzyżem Srebrnym Orderu Wojennego Virtuti Militari.
    Lieutenant Hieronim Dudwał was one of the most successful fighter pilots during the initial period of World War II. He shot down four German aircraft during the 1939 Polish Campaign. After escaping across the Polish border, Dudwał arrived in France three weeks later and joined I Polish Fighter Squadron. This unit never participated in action as a whole squadron and after the German invasion of France on 10 May 1940 it was split up, with some pilots being assigned to frontline squadrons whilst others flew protective patrols over French cities that focused on war production. At the beginning of June 1940 Dudwał was moved to the frontline and posted to GC II/10 squadron. On 7 June 1940, the 27-year-old offi cer died when his plane crashed into „La Marre” forest aft er being shot down whilst singlehandedly engaging several Messerschmitt 109s. He is buried in the Polish soldier’s cemetery in Aubérive. He was posthumously awarded the Silver Cross of the War Order of Virtuti Militari.
    Der aus Tschenstochau stammende Leutnant Hieronim Dudwał war einer der erfolgreichsten Piloten in der Anfangszeit des Zweiten Weltkriegs. Der Absolvent der Offi zierskadettenschule der Luftstreitkräfte in Dęblin errang alle seine vier Luft siege während der Kämpfe im polnischen Luftraum im Jahr 1939. Dieser Erfolg ist umso größer, als der junge Pilot ihn mit einer Ausrüstung erzielte, die technisch weniger fortgeschritten war als die des Feindes. Nachdem er nach Rumänien evakuiert worden war, gelangte er innerhalb von drei Wochen mit der Bahn nach Frankreich. In der an der Seite der Alliierten wiederaufgebauten Luft streitkräft e fand er sich in der 1. Jagdstaff el wieder, doch die Einheit kam nicht in vollem Umfang zum Einsatz. Nach dem Angriff vom 10. Mai 1940 wurde sie in Staff eln eingeteilt und sowohl an der Front als auch auf Patrouille eingesetzt, um die mit der französischen Rüstungsproduktion verbundenen Städte vor den Angriff en der Luftwaffe zu schützen. Anfang Juni wurde Hieronim Dudwał dem an der Front operierenden GC II/10 zugeteilt. Am 7. Juni wurde der 27-jährige Offi zier im Kampf gegen eine überwältigende Anzahl feindlicher Flugzeuge abgeschossen und starb beim Absturz im Wald von La Marre. Er ruht auf dem polnischen Soldatenfriedhof in Aubérive. Er wurde posthum mit dem Silbernen Kreuz des Kriegsordens Virtuti Militari ausgezeichnet.
    Źródło:
    Przegląd Historyczno-Wojskowy; 2022, XXIII (LXXIV), 3(281); 187-209
    1640-6281
    Pojawia się w:
    Przegląd Historyczno-Wojskowy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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