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Wyświetlanie 1-15 z 23
Tytuł:
Synthesis and characterization of Pt/CeO$\text{}_{x}$ systems for catalytic CO oxidation reaction
Autorzy:
Wróbel, R.
Łagonda, S.
Narkiewicz, U.
Pełech, R.
Becker, S.
Szymaszkiewicz, L.
Powiązania:
https://bibliotekanauki.pl/articles/2080016.pdf
Data publikacji:
2011-01-01
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Opis:
Four different ceria supported catalyst were prepared by impregnation method with Pt(NO$\text{}_{3}$)$\text{}_{2}$ solution. The two supports are commercially available (MaTeck) and the other two were prepared by precipitation and microwave assisted hydrothermal method (MAH) respectively. The phase composition and average crystallite size of the catalysts were characterised with XRD technique. Finally the catalytic activity in CO oxidation reaction were determined in plug flow reactor in temperature range 300-900 K with 1 K resolution. The catalysts obtained in both precipitation and MAH methods exhibit catalytic activity at room temperature whereas catalysts obtained on MaTeck supports are not active at those conditions. In turn, catalysts based on MaTeck support are more active in temperature range 420-700 K. The different activities are attributed to difference in average crystallite sizes and in support morphology.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2011, 66; 37-46
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Chemistry of Zirconia Nanopowders Doped with $Pr_2O_3$: an XPS Study
Autorzy:
Suchorski, Y.
Wrobel, R.
Becker, S.
Opalińska, A.
Narkiewicz, U.
Podsiadly, M.
Weiss, H.
Powiązania:
https://bibliotekanauki.pl/articles/1811498.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
79.60.-i
61.46.-w
61.46.Hk
Opis:
Zirconia nanopowders of tetragonal crystallographic structure doped with $Pr_2O_3$ were prepared by the microwave-assisted hydrothermal synthesis and coprecipitation method. The surface compositions were studied by X-ray photoelectron spectroscopy. The nanopowder particles appear to be inhomogeneous in their structure: for the surface region an enrichment with praseodymium is detected by X-ray photoelectron spectroscopy measurements. This allows the assumption of a core-shell-like structure of single nanopowders particles. The X-ray photoelectron spectroscopy studies confirm also $Zr^{4+}$ and $Pr^{3+}$ as main oxidation states of zirconium and praseodymium in the studied compounds.
Źródło:
Acta Physica Polonica A; 2008, 114, S; S-125-S-134
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study by modeling and simulation of open-switch fault diagnosis for five-level converters
Autorzy:
Becker, F.
Jamshidpour, E.
Poure, P.
Saadate, S.
Powiązania:
https://bibliotekanauki.pl/articles/136241.pdf
Data publikacji:
2017
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
open switch fault
fault diagnosis
fault detection
fault localization
Multilevel converter
neutral point
H-bridge
Opis:
In this paper, an open-switch fault diagnosis method for five-level H-Bridge Neutral Point Piloted (HB-NPP) or T-type converters is proposed. While fault tolerant operation is based on three steps (fault detection, fault localization and system reconfiguration), a fast fault diagnosis, including both fault detection and localization, is mandatory to make a suitable response to an open-circuit fault in one of the switches of the converter. Furthermore, fault diagnosis is necessary in embedded and safety critical applications, to prevent further damage and perform continuity of service. In this paper, we present an open-switch fault diagnosis method, based on the switches control orders and the observation of the converter output voltage level. In five-level converters such as HB-NPP and T-type topologies, some switches are mostly 'on' at the same time. Therefore, the fault localization is quite complicated. The fault diagnosis method we proposed is capable to detect and localize an open-switch fault in all cases. Computer simulations are carried out by using Matlab Simulink and SimPowerSystem toolbox to validate the proposed approach.
Źródło:
Transactions on Environment and Electrical Engineering; 2017, 2, 1; 27-34
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola psychologii w ekonomicznej teorii zachowań ludzkich Gary’ego S. Beckera
The role of psychology in Gary S. Becker’s economic approach to human behavior
Autorzy:
Fjałkowski, Karol
Powiązania:
https://bibliotekanauki.pl/articles/434632.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
Gary S. Becker
Jeremy Bentham
economic approach to human behavior
neoc¬lassical economics
moral psychology
Opis:
The paper presents an interpretation of G.S. Becker’s “economic approach to human behavior” with regard to relations of this standpoint in economic methodology with psychology. The aim of the paper is to properly identify the role that psychology plays both in works of Becker himself, and in the “economic approach”. Ties of psychology with the “economic approach” are subject to the analysis in the following aspects: Becker’s declarations, practice of his work, as well as in the context of methodological sources of inspiration of the “economic approach”, with the potential of its enhancement towards a more consistent use of findings of psychology. Beckerian methodology is presented in such a way, so as to highlight its historic and methodological roots and inspirations. It is considered as an uncompromised application of situational explanation, Popperian rationality principle, Robbins’ analytical definition of economic science, as well as Freidman’s view about the irrelevance of “realism” of economic model assumptions. The paper indicates that despite inspiration with Bentham’s psychology, the “economic approach to human behavior” fits into anti-psychologist paradigm in economic methodology. In accordance with methodological standpoints of Popper, Robbins and Friedman, Becker replaces “realistic” descriptions of human psyche with axiomatic, “unrealistic” assumptions of maximization and rationality. However, psychological knowledge is very relevant for Becker’s theory because it constitutes an important condition for accurate construction of individual utility functions. Therefore, by the utilization of a question from moral psychology, the paper presents the possibility of the ”economic approach” more deeply rooted in Bentham’s ideas, with potential benefits for explaining human behavior. As indicated by D.C. North, neoclassical economics poses a problem: Why do people comply with social institutions and keep promises under conditions, in which maximizing individual utility would suggest otherwise? A solution to this problem might be assuming the existence of a Beckerian commodity, that could be named moral self-satisfaction. This reasoning may run into criticism related generally to the elaborated methodological concept, with particular role of the “adhocery” accusation of Mark Balug. However, the concept of pleasures and pains bound with moral beliefs is rooted in our psychological, and even biological, knowledge about man, his needs and mind. The approach this paper proposes may be helpful in accomplishing a number of goals. First, the ancient forerunner of the “economic approach” Jeremy Bentham tried to create a comprehensive list of kinds of pleasures and pains. Such a list is increasingly more likely to be created in contemporary times, due to developments in psychology, unknown to Bentham. Secondly, developments in psychology may offer both inspiration and empirical support for particular commodities assumed in Beckerian utility functions,
Źródło:
Ekonomia - Uniwersytet Ekonomiczny we Wroclawiu; 2013, 4 (25); 54-63
2080-5977
Pojawia się w:
Ekonomia - Uniwersytet Ekonomiczny we Wroclawiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Properties and Microstructure of InGaN Grown by Molecular Beam Epitaxy
Autorzy:
Böttcher, T.
Einfeldt, S.
Figge, S.
Kirchner, V.
Hommel, D.
Selke, H.
Ryder, P. L.
Bertram, F.
Riemann, T.
Christen, J.
Lunz, U.
Becker, C. R.
Powiązania:
https://bibliotekanauki.pl/articles/1969025.pdf
Data publikacji:
1998-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.35.Dv
68.65.+g
78.20.-e
78.55.-m
78.55.Cr
Opis:
The luminescence of In$\text{}_{x}$Ga$\text{}_{1-x}$N is studied for thick epitaxial layers and quantum wells. Using spatially resolved cathodoluminescence spectroscopy the commonly observed broad integral photoluminescence spectra were found to result from spectral and lateral inhomogeneous emission across the samples. Moreover, the integral photoluminescence and absorption spectra show different temperature dependences. The effects can be explained assuming fluctuations of the composition associated with a variation of the band gap.
Źródło:
Acta Physica Polonica A; 1998, 94, 2; 260-264
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical in situ Study of Reduction/Oxidation Processes in Cr,Mg:YAG Epitaxial Film
Autorzy:
Buryy, O.
Ubizskii, S.
Syvorotka, I.
Becker, K.
Powiązania:
https://bibliotekanauki.pl/articles/1550540.pdf
Data publikacji:
2010-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.Cc
66.30.Dn
66.30.hd
78.30.Hv
78.40.Ha
Opis:
The changes of the optical absorption spectra of Cr,Mg:YAG epitaxial film caused by high-temperature redox treatment are investigated by means of in situ spectroscopy. The spectra were registered in the visible and near-IR spectral regions at temperatures up to 1100 K. The kinetics of optical absorption changing were obtained in the temperature range from 936 K to 1091 K and were described by mathematical model connecting the chromium recharging process with oxygen vacancies diffusion. The parameters of the model were determined from the approximations of the experimental kinetics.
Źródło:
Acta Physica Polonica A; 2010, 117, 1; 184-188
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nöte und Zäsuren eines modernen Migrantenschicksals – der deutsch-polnische Grenzgänger Artur Becker und sein Roman ,Das Herz von Chopin’
Oppressions and turning points in the fate of the contemporary migrant – Polish-German writer-wanderer Artur Becker and his novel ,Chopin’s Heart’
Autorzy:
Krauze-Olejniczak, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/1178825.pdf
Data publikacji:
2013-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Opis:
The following article aims at presenting the main emigration-related interpretative aspects of Becker’s prose and attempts to put them in the context of the post-colonial theories. The characters created by Artur Becker, who calls himself a “Polish writer of German language”, roam continually between the old and the new fatherland and struggle with the feeling of not belonging to any of these worlds. The experience of alienation in foreign country stems from a “transition” in a double sense: on the one side a physical change of the place of residence to Germany which means crossing the “mystical” frontier between the East and the West and on the other a fruitful caesura: the crisis of the identity leads the protagonists of Becker to the conclusion that this hybridity constitutes an intellectual potential and an existential skill.In the introduction, the foundations of the Postcolonial Theories will be outlined, with the emphasis on the concept of Homi Bhabha which postulates that the fluidity of identity forming in a symbolic “third space”, enables the cultural hybridity. Subsequently, after a short presentation of the characters and the work of Artur Becker, the research will focus on the novel Das Herz von Chopin (Chopin’s Heart), in which the main character – a financially successful car dealer who emigrated from the communistic Poland to Germany almost 20 years ago while being internally conflicted begins to explore a zone betwixt-and-between to find his own way to happiness. 
Źródło:
Studia Germanica Posnaniensia; 2013, 34; 163-172
0137-2467
Pojawia się w:
Studia Germanica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New upper Givetian to basal Frasnian conodont faunas from the Tafilalt (Anti-Atlas, Southern Morocco)
Autorzy:
Aboussalam, Z.S.
Becker, R.T.
Powiązania:
https://bibliotekanauki.pl/articles/2059516.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Morocco
Frasnes Event
Givetian
Frasnian
conodont taxonomy
conodont biostratigraphy
Opis:
Conodont faunas, mostly from previously unsampled sections of the Tafilalt (eastern Anti-Atlas, Morocco) and spanning the upper Givetian to basal Frasnian, include first records of species for the region and NW Gondwana as well as new taxa: "Ozarkodina" maroccanica n. sp., Polygnathus aequidivisus n. sp., Po. dengleri sagitta n. ssp., Po. jorfensis n. sp., Po. saevus n. sp., Po. tafilensis n. sp., and Schmidtognathus longicavus n. sp. The morphology of Tortodus subsymmetricus n. sp. suggests relation ships of Tortodus with Frasnian ancyrognathids. Other taxa are described in open nomenclature: Po. cristatus n. ssp., Icriodus aff. I. symmetricus, Skeletognathus aff. Sk. norrisi, and enigmatic supposed Pb elements (Gen. et sp. indet.). Ctenopolygnathus lanei Kuzmin (1995) is emended and distinctive morphotypes are recognized in Ct. angustidiscus and Po. collieri. Mesotaxis falsiovalis Sandberg et al. (1989) is a subjective junior synonym of the widely over looked M. guanwushanensis (Tian, 1988). There vised regional lithostratigraphy and conodont sequences allow to refine the upper Givetian zonation. The former Upper disparilis Zone is subdivided into succes sive Po. dengleri sagitta and Po. dengleri dengleri subzones. The basalmost Frasnian Ancyrodella rotundiloba pristina Zone (= MN 1 Zone) is preserved as a thin, condensed lime stone just at one locality (Bine Jebilet). The over lying Frasnes Event Beds (Lower Styliolinites) seem to fall in the subsequent Ad. rotundiloba soluta Zone (MN 2 Zone). Records of rare taxa, such as Po. paradecorosus, Po. Pollocki Morphotype 1, old est Po. webbi, Ct. angustidiscus, and Ct. lanei may be help ful for correlation into distant areas or shallower facies.
Źródło:
Geological Quarterly; 2007, 51, 4; 345-374
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model koncepcyjny systemu hydrogeologicznego obszaru oddziaływania Lubińsko-Głogowskiego Obszaru Miedzionośnego (LGOM)
Conceptual model of hydrogeological system of Lubin-Głogów Ore District impact area
Autorzy:
Staśko, S.
Gurwin, J.
Wcisło, M.
Modelska, M.
Kryza, H.
Kryza, J.
Olichwer, T.
Buczyński, S.
Tarka, R.
Wąsik, M.
Becker, R.
Powiązania:
https://bibliotekanauki.pl/articles/2062565.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
modelowanie numeryczne
model hydrogeologiczny
model koncepcyjny
kopalnie głębinowe
drenaż kopalniany
numerical modelling
groundwater model
conceptual model
deep mine
mine drainage
Opis:
W Instytucie Nauk Geologicznych Uniwersytetu Wrocławskiego opracowano numeryczny model hydrogeologiczny 3D (regionalny), uwzględniający strefę oddziaływania górnictwa rud miedzi LGOM. Stworzony i przetestowany szczegółowy model hydrogeologiczny obejmuje swym zasięgiem powierzchnię 3049 km2, w tym obszary górnicze KGHM Polska Miedź (650 km2). Zbudowany model ma za zadanie przeprowadzenie weryfikacji struktury hydrogeologicznej, rozpoznanie i ustalenie danych ilościowych systemu krążenia wód podziemnych, określenie zmian warunków przepływu wód podziemnych w trakcie prowadzonej eksploatacji złoża a w konsekwencji ustalenie bilansów wód podziemnych modelowanych poziomów wodonośnych oraz ocenę ilościową dopływów kopalnianych na podstawie uzyskanego odwzorowania hydrodynamiki systemu. W efekcie końcowym uaktualniany model posłuży do wykonania symulacji prognostycznych w nawiązaniu do przewidywanego rozwoju obszarów wyrobisk górniczych. W artykule przedstawiono model koncepcyjny systemu hydrogeologicznego badanego obszaru. Stanowił on zakończenie wstępnych etapów prac oraz podstawę przy konstruowaniu modelu numerycznego.
3D numerical hydrogeological regional model has been developed in the Institute of Geological Sciences, University of Wrocław. The model takes into account the impact zone of copper ore mines Lubin-Głogów Ore District (LGOM). Detailed hydrogeological model has been created and tested covered area of 3049 km2 (in this the mining areas KGHM covered 650 km2). Built model is designed to verify hydrogeological structure, identification and determination of groundwater circulation system, to determine changes in groundwater flow during exploitation of the deposit. As a result developed model can determine groundwater balance and groundwater inflow to the mine based on the obtained image hydrodynamics of the system. In the end, updated model will be used to simulate the prognosis in relation to the anticipated development of mine workings.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2012, 451 Hydrogeologia z. 13; 203--210
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model altruizmu Garyego Beckera w perspektywie bioekonomicznej
Gary Becker’s Altruism Model in Bioeconomic Perspective
Autorzy:
Saryusz-Wolski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/575253.pdf
Data publikacji:
2003-11-25
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Opis:
Representatives of both economic and biological sciences have for a long time been struggling with a problem posed by empirically observable manifestations of altruism as a potentially irrational form of behaviour leading to a cut in individual consumption levels and being contrary to natural selection principles. Many economic models are based on the concept of material egoism of individuals, assuming that they maximise their individual consumption levels irrespective of the impact exerted by their behaviour on others’ consumption. This article attempts to present altruistic behaviour within the framework of one modern economic model and, by means of an interdisciplinary approach and on grounds of biological sciences, to prove rationality of that behaviour towards relatives by a person acting altruistically. To this end, William Hamilton’s biological theory of kin selection is presented in the first place. It is followed by Gary Becker’s model of economic altruism, proving that altruistic behaviour may lead to an increased level of an altruist’s consumption and translating the economic utility function into biological adaptation categories. Within the above-mentioned model it is attempted to prove that even individuals whose utility function does not involve interdependence with consumption of other individuals may take altruistic behaviour within the framework of manifestations of individual egoism. This is the case because they anticipate a positive secondary impact of altruistic behaviour on their own consumption. In another step, by means of enlargement of the Becker model into implication of the Hamilton law, the author proved rationality of an increased scope for altruism than is the case with the original version of this model, due to taking into account genetic interests leading to reproduction of someone’s genes thanks to relatives supported by that person.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2003, 188, 11-12; 38-50
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maximilian Becker: Mitstreiter im Volkstumskampf. Deutsche Justiz in den eingegliederten Ostgebieten 1939—1945. München: De Gruyter Oldenburg, 2014, 352 s.
Autorzy:
Graczyk, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/782701.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Źródło:
Z Dziejów Prawa; 2018, 11, 2; 351-356
1898-6986
2353-9879
Pojawia się w:
Z Dziejów Prawa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Le Rayon vert de Jules Verne. La confrontation ironique des discours météorologiques
Jules Verne’s Le Rayon vert. The ironical confrontation of meteorological discourses
Autorzy:
Becker, Karin
Powiązania:
https://bibliotekanauki.pl/articles/1368158.pdf
Data publikacji:
2021-03-15
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Jules Verne
scientific novel
romanticism
meteorology
love story
Opis:
Jules Verne’s Le Rayon vert (1882) is at the same time a scientific novel and a love story, a repertory of knowledge and a criticism of clichés. Telling the amusing attempts of a little group of travelers that tries in vain to catch sight of the “green ray” – the last impression of sunset – on the horizon from the Scottish coast, the author confronts in an ironical way different stereotypical discourses about weather phenomena which coexist in the bourgeois society of the late 19th century. Verne mocks equally scientific, folkloristic and romantic ideas about meteorological observations and uses these opposite explications of the mysteries of nature to characterize his protagonists and to develop the suspense of the narration.
Źródło:
Studia Romanica Posnaniensia; 2021, 48, 1; 55-67
0137-2475
2084-4158
Pojawia się w:
Studia Romanica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kosmopolska Artura Beckera – przestrzeń otwarta, przestrzeń poszukiwania własnej tożsamości
Kosmopolska (“Cosmopoland”) by Artur Becker – an open space, a space for exploring one’s own identity
Autorzy:
Gospodarczyk, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/26731329.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Komisji Edukacji Narodowej w Krakowie
Tematy:
Artur Becker
Cosmopoland
narrative identity
Charles Taylor
Paul Ricoeur
Kosmopolska
tożsamość narracyjna
Opis:
As a Polish writer of German-language works, Artur Becker sees his work and his biography in his self-narrative at the interface of the German language he chose and the Polish culture and language he abandoned due to his emigration to Germany. His novels address the crisis of identity and the search for identity of his characters in exile or on their return to their homeland of Warmia and Masuria. Becker’s collection of essays, published in Polish under the title Kosmopolska i Kosmopolacy. W poszukiwaniu europejskiego domu. Eseje (2019), is also a discourse on the search for identity. The article is an attempt to characterise the Becker’s definition of the term Kosmopolska, which incidentally comes from another émigré writer, A. Bobkowski. Kosmopolska turns out to be an open space, constructed narratively, that is a space of searching for and creating one’s identity in narrative and through language. This form of defining identity is part of P. Ricoeur’s and Ch. Taylor’s concepts of narrative identity. At each stations of the journey through Kosmopolska, Becker explains the many cultural patterns and codes rooted in Polish identity, but also shares his advice, literary experts, and thus becomes a mediator between cultures.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia Historicolitteraria; 2022, 22; 223-235
2081-1853
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia Historicolitteraria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
J.S. Mill i G.S. Becker o równości kobiet i mężczyzn w społeczeństwie
J.S. Mill and G.S. Becker about gender equality in society
Autorzy:
Kraińska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/569854.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
równouprawnienie
społeczeństwo
płeć
dyskryminacja
Opis:
W artykule podjęto próbę przedstawienia problemu dyskryminacji kobiet w aspekcie społeczno-ekonomicznym, uwzględniając poglądy J.S. Milla oraz G.S. Beckera. Praca Milla pt. Poddaństwo kobiet, zaliczana jest do kanonu myśli feministycznej, a Ekonomiczna teoria zachowań ludzkich autorstwa G.S. Beckera pokazuje, że na gospodarkę rynkową wpływ mają różne czynniki, które niekoniecznie są bezpośrednio z ekonomią powiązane. Obaj naukowcy, których poglądy zostały przedstawione w niniejszym artykule, są zdania, że kobiety są ofiarami dyskryminacji. Zarówno J.S. Mill, jak i G.S. Becker uważają, że gorsze traktowanie kobiet negatywnie wpływa na gospodarkę. Zdaniem tych wybitnych i zasłużonych ekonomistów każdy człowiek powinien mieć takie same prawa społeczne, ekonomiczne i polityczne
Źródło:
Ekonomia XXI Wieku; 2016, 3 (11); 367-376
2353-8929
Pojawia się w:
Ekonomia XXI Wieku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integral and fractional equations, positive solutions, and Schaefer’s fixed point theorem
Autorzy:
Becker, L. C.
Burton, T. A.
Purnaras, I. K.
Powiązania:
https://bibliotekanauki.pl/articles/255409.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fixed points
fractional differential equations
integral equations
Riemann-Liouville operators
Opis:
This is the continuation of four earlier studies of a scalar fractional differential equation of Riemann-Liouville type [formula] in which we first invert it as a Volterra integral equation [formula] and then transform it into [formula] where R is completely monotone with [formula] and J is an arbitrary positive constant. Notice that when x is restricted to a bounded set, then by choosing J large enough, we can frequently change the sign of the integrand in going from (b) to (c). Moreover, the same kind of transformation will produce a similar effect in a wide variety of integral equations from applied mathematics. Because of that change in sign, we can obtain an a priori upper bound on solutions of (b) with a parameter λ ∈ (0, 1] and then obtain an a priori lower bound on solutions of (c). Using this property and Schaefer’s fixed point theorem, we obtain positive solutions of an array of fractional differential equations of both Caputo and Riemann-Liouville type as well as problems from turbulence, heat transfer, and equations of logistic growth. Very simple results establishing global existence and uniqueness of solutions are also obtained in the same way.
Źródło:
Opuscula Mathematica; 2016, 36, 4; 431-458
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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