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Wyświetlanie 1-15 z 54
Tytuł:
ILP modeling of many-to-many replicated multimedia communication
Autorzy:
Walkowiak, K.
Bulira, D.
Careglio, D.
Powiązania:
https://bibliotekanauki.pl/articles/308697.pdf
Data publikacji:
2013
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
ILP modeling
many-to-many communication
network optimization
replica location
Opis:
On-line communication services were evolving from a simple text-based chats towards sophisticated videopresence appliances. The bandwidth consumption of those services is constantly growing due to the technology development and high user and business needs. That fact leads us to implement optimization mechanisms into the multimedia communication scenarios. In this paper, the authors concentrate on many-to-many (m2m) communication, that is mainly driven by the growing popularity of on-line conferences and telepresence applications. An overlay model where m2m flows are optimally established on top of a given set of network routes is formulated and a joint model where the network routes and the m2m flows are jointly optimized. In the models, the traffic traverses through replica servers, that are responsible for stream aggregation and compression. Models for both predefined replica locations and optimized server settlement are presented. Each model is being followed by a comprehensive description and is based on real teleconference systems.
Źródło:
Journal of Telecommunications and Information Technology; 2013, 3; 56-65
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Many-Body Localization for Randomly Interacting Bosons
Autorzy:
Sierant, P.
Delande, D.
Zakrzewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1033315.pdf
Data publikacji:
2017-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
many-body localization
Bose-Hubbard model
disorder in many-body physics
mobility edge
Opis:
We study many-body localization in a one dimensional optical lattice filled with bosons. The interaction between bosons is assumed to be random, which can be realized for atoms close to a microchip exposed to a spatially fluctuating magnetic field. Close to a Feshbach resonance, such controlled fluctuations can be transfered to the interaction strength. We show that the system reveals an inverted mobility edge, with mobile particles at the lower edge of the spectrum. A statistical analysis of level spacings allows us to characterize the transition between localized and excited states. The existence of the mobility edge is confirmed in large systems, by time dependent numerical simulations using tDMRG. A simple analytical model predicts the long time behavior of the system.
Źródło:
Acta Physica Polonica A; 2017, 132, 6; 1707-1712
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The lattice of varieties of fibered automata
Autorzy:
Mućka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/728906.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
fibered automata
many-sorted algebras
varieties of many-sorted algebras
lattice of varieties
Opis:
The class of all fibered automata is a variety of two-sorted algebras. This paper provides a full description of the lattice of varieties of fibred automata.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2007, 27, 1; 87-107
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability and Generalized Competitive Equilibria in a Many-to-Many Gale-Shapley Market Model
Stabilność i uogólnione równowagi konkurencyjne w modelu rynku Gale’a-Shapleya typu „many-to-many”
Autorzy:
Świtalski, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1050555.pdf
Data publikacji:
2016-09-30
Wydawca:
Główny Urząd Statystyczny
Tematy:
stable matching
Gale-Shapley theory
many-to-many model
competitive equilibrium
discrete market model
contract theory
kojarzenie stabilne
teoria Gale-a-Shapleya
model „many-to-many”
równowaga konkurencyjna
dyskretny model rynku
teoria kontraktów
Opis:
We define, for some variant of a many-to-many market model of Gale-Shapley type, a concept of generalized competitive equilibrium and show that, under suitable conditions, stable matchings in such a model can be represented as competitive equilibria allocations (and vice versa). Our results are far-reaching generalizations of the “discrete supply and demand lemma” of Azevedo, Leshno (2011) for the college admissions market. Using the results of Alkan, Gale (2003), we also prove a theorem on existence of generalized equilibria in our model.
W artykule zdefiniowano, dla pewnego wariantu modelu rynku Gale’a-Shapleya (typu „many-to-many”), pojęcie uogólnionej równowagi konkurencyjnej i pokazano, że przy odpowiednich założeniach, skojarzenia stabilne w tym modelu mogą być reprezentowane jako alokacje równowag konkurencyjnych (i vice versa). Przedstawione wyniki są daleko idącymi uogólnieniami „lematu o podaży i popycie” z pracy Azevedo, Leshno (2011) dotyczącego modelu rekrutacji kandydatów do szkół. Wykorzystując wyniki Alkana, Gale’a (2003), udowodniono również twierdzenie o istnieniu uogólnionych równowag dla podanego modelu.
Źródło:
Przegląd Statystyczny; 2016, 63, 3; 237-254
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Collectivity and Periodic Orbits in a Chain of Interacting, Kicked Spins
Autorzy:
Akila, M.
Waltner, D.
Gutkin, B.
Braun, P.
Guhr, T.
Powiązania:
https://bibliotekanauki.pl/articles/1030009.pdf
Data publikacji:
2017-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
quantum chaos
many-body systems
semiclassics
Opis:
The field of quantum chaos originated in the study of spectral statistics for interacting many-body systems, but this heritage was almost forgotten when single-particle systems moved into the focus. In recent years new interest emerged in many-body aspects of quantum chaos. We study a chain of interacting, kicked spins and carry out a semiclassical analysis that is capable of identifying all kinds of genuine many-body periodic orbits. We show that the collective many-body periodic orbits can fully dominate the spectra in certain cases.
Źródło:
Acta Physica Polonica A; 2017, 132, 6; 1661-1665
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability and Price Equilibria in a Many-to-Many Gale-Shapley Market Model
Stabilność i równowagi cenowe w modelu rynku Gale’a-Shapleya typu „many-to-many”
Autorzy:
Świtalski, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1373896.pdf
Data publikacji:
2017
Wydawca:
Główny Urząd Statystyczny
Tematy:
skojarzenie stabilne
teoria Gale’a-Shapleya
model „many-to-many”
równowaga cenowa
funkcje wyboru
dyskretny model rynku
Opis:
W artykule zbadano zależności między uogólnionymi równowagami konkurencyjnymi zdefiniowanymi w pracy Świtalskiego (2016), a równowagami cenowymi dla pewnego wariantu modelu rynku Gale’a-Shapleya (typu „many-to-many”), a także między równowagami cenowymi a skojarzeniami stabilnymi dla tego modelu. Uzyskane wyniki wykorzystano do udowodnienia twierdzeń o istnieniu równowag cenowych w modelu GS typu many-to-many oraz w pewnym modelu typu many-to-many uogólniającym model zawarty w pracy Chen i inni (2014).
Źródło:
Przegląd Statystyczny; 2017, 64, 3; 229-248
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of electronelectron correlations on positron-electron momentum density distributions
Autorzy:
Boroński, E.
Powiązania:
https://bibliotekanauki.pl/articles/146328.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
positron annihilation
electronic structure
many-body physics
Opis:
The calculations of the influence of the self-energy effects on the electron-positron (e-p) enhancement factors and the e-p momentum distributions are presented. The approach bases on the novel formulation of the Bethe- -Goldstone (B-G) equation for the positron in an electron gas where the scattering of the electrons into the states below the Fermi surface due to the self-energy effects is allowed. This equation has been solved and the corresponding e-p enhancement factors and momentum distributions have been found. The agreement between the absolute values of the theoretical calculations and experimental data has improved noticeably.
Źródło:
Nukleonika; 2010, 55, 1; 3-8
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Development of a UDP-Based Connection-Oriented Multi-Stream One-to-Many Communication Protocol
Autorzy:
Stanciu, V.
Andreica, M. I.
Olaru, V.
Tăpuş, N.
Powiązania:
https://bibliotekanauki.pl/articles/308499.pdf
Data publikacji:
2012
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
communication protocol
connection oriented
multiple streams
one-to-many
Opis:
A communication protocol is a set of rules defined formally that describes the format of digital messages and the rules for exchanging those messages in or between computing systems. The Internet Protocol Suite used for communications throughout the Internet uses encapsulation to provide a way of abstracting protocols and services. This abstraction is grouped into layers of general functionality. For protocols on the transmission layer, many choices exist. But while popular protocols such as TCP, UDP and SCTP do provide connection oriented communication offering reliability, ordering and data integrity, solutions that offer such connections from one point to multiple endpoints are still limited. TCP only supports point-to-point communication and SCTP offers multi-homing functionality, but the transmission is still limited to two logical endpoints. In this paper we use the simple, stateless, transmission model of UDP in order to provide TCP-like services for one-to-many communication that is not limited to just multi-homing or other particular solutions. The protocol supports reliable communication from one endpoint to multiple endpoints in different transmission modes. In order to make it easier for developers to customize the protocol to their needs and possibly extend/modify it in order to create new variants from it, the protocol is developed in user space. Because of this design restriction performance wasn't the main objective of our work, but rather the ease of customization and experimentation with new protocol variants. The protocol was implemented in the C++ programming language using classes with virtual members. New variants of components, such as packet retransmission, can easily be implemented without changing the whole code base.
Źródło:
Journal of Telecommunications and Information Technology; 2012, 1; 3-15
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In Pursuit of True Wisdom: How the Re-Emergence of Classical Wonder Should Replace Descartes’s Neo-Averrostic Sophistry
Autorzy:
Nehez, Jason
Powiązania:
https://bibliotekanauki.pl/articles/507568.pdf
Data publikacji:
2020-06
Wydawca:
International Étienne Gilson Society
Tematy:
Averroes
Aquinas
Descartes
wisdom
science
skepticism
wonder
metaphysics
one
many
Opis:
Modern mathematical physics often claims to make philosophy obsolete. This presentation aims to show that the modern concept of wisdom fundamentally diverges with the thinking of Descartes, that, strictly speaking, at least in his metaphysical first principles, if not in his chief aim, he may be a sophist and no philosopher at all. Descartes denies the classical understanding of philosophy and thereby reduces the human person to an intellect separate from the body. Descartes initiated a popular understanding of sophistry that reverberates to today in our modern institutions of philosophy and science. But St. Thomas Aquinas anticipated this divergence and gave a defense of true wisdom in his writing against Averroes. This presentation concludes with what constitutes real philosophy and science as presented by St. Thomas Aquinas, namely sense wonder that creates a search for the true knowledge of the unity responsible for true causes of true effects. For a true restoration of philosophy and science we will need a reemergence and recovery of this understanding of wisdom.
Źródło:
Studia Gilsoniana; 2020, 9, 2; 287-315
2300-0066
Pojawia się w:
Studia Gilsoniana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GPU-based parallel algorithm of interaction induced light scatering simulation in fluids
Autorzy:
Dawid, Aleksander
Powiązania:
https://bibliotekanauki.pl/articles/1954464.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska
Tematy:
GPGPU
CUDA
interaction induced phenomena
many body correlation function
parallel algorithm
Opis:
We parallelized the sequential algorithm of the four-body correlation function if eachcombination of two pairs(i, j)and(k, l) was averaged over the time in a separate calculation thread. The generator of pairs used as the input for this algorithm was also parallelized and connected with the 4-body correlation function calculations. We used our algorithm to accelerate extremely intensive calculations of the 4-body polarizability anisotropy correlation functions,which were very important to estimate the interaction induced light scattering spectrum. The resulting C code was used to test our algorithm on Graphics Processing Units (GPUs) with the Compute Unified Device Architecture (CUDA) technology from NVIDIA®Corporation. Asa result, we achieved 12 times the acceleration of the 4-body correlation function calculations in comparison to the Central Processing Unit (CPU) core. The peak performance of the GPU calculations was registered at the level of 19 times faster than the CPU core. We also found thatacceleration depended on the memory consumption. In the single precision mode, the relative error between the CPU and GPU calculations was found to be within 0.1%
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2019, 23, 1; 5-17
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielowartościowość a pojęcia epistemiczne
Many Values and Epistemic Concepts
Autorzy:
Lechniak, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2013395.pdf
Data publikacji:
2006
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
logika epistemiczna
logika wielowartościowa
przekonanie
epistemic logic
many-valued logic
belief
Opis:
The paper presents several attempts to express intuition concerning the understanding of knowledge and conviction by means of the conceptual apparatus of many-valued logic. J. Łoś’s pioneer system has been presented here, the system constructed by Ngoc Duc Ho, in which the internal logic in this system is used by the knowing subject as the three-valued logic of Łukasiewicz and the third logical value is understood as “unjustified”, and the four-valued system of N. Belnap, the system that allows for the occurrence of propositions which are evaluated both as true and false.
Źródło:
Roczniki Filozoficzne; 2006, 54, 2; 375-390
0035-7685
Pojawia się w:
Roczniki Filozoficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some Details of Statistical Mechanics of Many-Body Systems in the Presence of a Measurable Minimal Length
Autorzy:
Alizadeh, A.
Nozari, K.
Powiązania:
https://bibliotekanauki.pl/articles/1032577.pdf
Data publikacji:
2017-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
quantum gravity phenomenology
statistical physics
many-body systems
minimal measurable length
Opis:
Different approaches to quantum gravity proposal such as string theory, doubly special relativity, and also black holes physics, all commonly address the existence of a minimal measurable length of the order of the Planck length. One way to apply the minimal length is changing the Heisenberg algebra in the phase space which is known as the generalized uncertainty principle. It is essential to apply this feature on the statistical mechanics of many body systems in the presence of a measurable minimal length scale in order to see the roles of this natural cutoff on physical phenomena. In this paper, some details of statistical mechanics of many body systems that have not been studied carefully in literature are studied in the presence of minimal length scale. The issues such as isomerization, the Liouville theorem, virial theorem and equipartition theorem are studied in this setup with details and the results are explained thoroughly.
Źródło:
Acta Physica Polonica A; 2017, 132, 4; 1329-1332
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polyadic algebras over nonclassical logics
Autorzy:
Pigozzi, Don
Salibra, Antonino
Powiązania:
https://bibliotekanauki.pl/articles/1361079.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
lambda calculus
modal logic
intuitionistic logic
many-valued logic
BCK logic
Opis:
The polyadic algebras that arise from the algebraization of the first-order extensions of a SIC are characterized and a representation theorem is proved. Standard implicational calculi (SIC)'s were considered by H. Rasiowa [19] and include classical and intuitionistic logic and their various weakenings and fragments, the many-valued logics of Post and Łukasiewicz, modal logics that admit the rule of necessitation, BCK logic, etc.
Źródło:
Banach Center Publications; 1993, 28, 1; 51-66
0137-6934
Pojawia się w:
Banach Center Publications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Variant of Material Connexive Logic
Autorzy:
Belikov, Alexander
Zaitsev, Dmitry
Powiązania:
https://bibliotekanauki.pl/articles/2142753.pdf
Data publikacji:
2021-11-09
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
many-valued logics
connexive logic
four-valued logic MC
informal reasoning
Opis:
The relationship between formal (standard) logic and informal (common-sense, everyday) reasoning has always been a hot topic. In this paper, we propose another possible way to bring it up inspired by connexive logic. Our approach is based on the following presupposition: whatever method of formalizing informal reasoning you choose, there will always be some classically acceptable deductive principles that will have to be abandoned, and some desired schemes of argument that clearly are not classically valid. That way, we start with a new version of connexive logic which validates Boethius’ (and thus, Aristotle’s) Theses and quashes their converse from right to left. We provide a sound and complete axiomatization of this logic. We also study the implication-negation fragment of this logic supplied with Boolean negation as a second negation.
Źródło:
Bulletin of the Section of Logic; 2022, 51, 2; 227-242
0138-0680
2449-836X
Pojawia się w:
Bulletin of the Section of Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Notes on aplications of the dual fountain theorem to local and nonlocal elliptic equations with variable exponent
Autorzy:
Stegliński, Robert
Powiązania:
https://bibliotekanauki.pl/articles/2216155.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
dual fountain theorem
p(·)-Laplacian
fractional p(·)-Laplacian
infinitely many solution
Opis:
Using the Dual Fountain Theorem we obtain some existence of infinitely many solutions for local and nonlocal elliptic equations with variable exponent. Our results correct some of the errors that have appeared recently in the literature.
Źródło:
Opuscula Mathematica; 2022, 42, 5; 751-761
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 54

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