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Найдено 55 139 публикаций
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Статья
Bykov A. Current Sociology. 2017. Vol. 65. No. 6. P. 797-813.
Добавлено: 4 августа 2016
Статья
Vinogradova A. S., Naletova V., Turkov V. Physics Procedia. 2010. No. 9. P. 68-73.

В данной работе исследуется поведение (распад и восстановление) магнитожидкостной перемычки  между двумя соосными цилиндрами в магнитном поле линейного проводника с током при любых значениях углов смачивания магнитной жидкости.

Добавлено: 26 ноября 2012
Статья
A. A. Vnykov, Shabnom M. Advances in the Astronautical Sciences. 2017. Vol. 955. P. 921-940.
Добавлено: 17 марта 2018
Статья
Berger G., Beklemishev L. D., Tompits H. Logic Journal of the IGPL. 2018. Vol. 26. No. 5. P. 505-538.

We consider a many-sorted variant of Japaridze’s polymodal provability logic (⁠GLP⁠). In this variant, which is denoted GLP∗⁠, propositional variables are assigned sorts n≤ω⁠, where variables of finite sort n<ω are interpreted as Π_{n+1}-sentences of the arithmetical hierarchy, while those of sort ω range over arbitrary ones. We prove that GLP∗is arithmetically complete with respect to this interpretation. Moreover, we relate GLP∗ to its one-sorted counterpart GLP and prove that the former inherits some well-known properties of the latter, like Craig interpolation and polynomial space (PSPACE) decidability. We also study a positive variant of GLP∗ that allows for an even richer arithmetical interpretation—variables are permitted to range over theories rather than single sentences. This interpretation in turn allows the introduction of a modality that corresponds to the full uniform reflection principle. We show that our positive variant of GLP∗ is arithmetically complete.

Добавлено: 14 февраля 2019
Статья
Peiris U., Bhar R., Colwell D. Journal of Applied Statistical Science. 2010. Vol. 17. No. 3. P. 427-445.

This paper analyzes a short-term interest rate model with mean and volatility driven by an unobserved Markov chain. There are two main innovations in the approach. Firstly, we allow the state generating process to be endogenous as opposed to most such studies which assume this is an exogenous process. This model captures the dynamics of the short-rate process successfully and conclusively performs better than a GARCH process. Secondly, we use heuristic arguments to determine the relationshi p between predictable policy, i.e. transparency and measures of openness and accountability on th e part of the Central Banks. In this sense this study is unusual in the literature on Markov switching applications to short rate, since we draw economic conclusions rather than simply analyzing econometric properties. Results suggest that the market generally anticipates rate changes one-period-ahead and that the move by Banks towards greater openness and accountability in policy may have contributed to this. Finally, a non-parametric statistic, the concordance measure, indicates the nature of the co- movement in regimes and finds evidence of similar levels and regimes of predictability across Anglophile countries.

Добавлено: 28 июня 2013
Статья
Mylonas Y. tripleC – Cognition, Communication, Co-operation. 2012. No. 10(1). P. 1-11.

Based on an interview with a hip-hop artist from Eastern Poland, this article critically assesses amateur art pro-duction proliferating throughout the globe today through individuals’ creative usages of new ICTs and new media affor-dances. The post-Fordist material and ideological context of contemporary social life is the main focus point of the article’s critique. Scarcity, dispossession, and entrepreneurship are the main analytical concepts used to develop a critical analysis and explanation of mainstream realities of amateur artistic production today. Within a context defined by precarious work conditions and prospects, material scarcity, and consumerist aspirations, media and technological potentialities are strategi-cally used by the amateur artist-entrepreneur a) as resources where creativity is put to work for potential socio-economic elevation and inclusion in the global industrial artistic scene (in the case of private ICT), b) as “free” resources, appropriated for entrepreneurial aspirations (in the case of “free“ digital material circulating online, particularly through peer to peer net-works), c) as channels for self promotion and networking (in the case of web 2.0 structures). What is often less apparent to the amateur artists, though, concerns the exploitative capacities of corporate Internet to dispossess amateur work and online social relations for the purposes of capital accumulation and reproduction. Unless critiqued, “free culture” -generated by new ICTs and new media- is assimilated by the material and ideological power of late capitalism and is “put to work” for the (re)production of late capitalism. The article concludes by suggesting the critical challenging of the mainstream artistic identity and the critical use and appropriation of new media/ ICT’s potentialities.

Добавлено: 2 декабря 2014
Статья
Belenky A., King D. Mathematical and Computer Modelling. 2007. Vol. 45. No. 5-6. P. 585-593.

A US Federal election in which candidates from two major political parties compete for the votes of those undecided voters in a state who usually do not vote in US elections is considered. A mathematical model for evaluating the expectation of the margin of votes to be received from such voters by either candidate as a result of the election campaigns of all the competing candidates is proposed. On the basis of this model, finding the estimation under consideration is reducible to finding the minimum of the maximin function of the difference of two bilinear functions with one and the same first vector argument whose second vector arguments belong to a polyhedron of connected variables (strategies of the candidates), and this minimum is sought on another polyhedron.

Добавлено: 21 октября 2016
Статья
Musatova E. G., Lazarev A. A., Ponomarev K. V. et al. IFAC-PapersOnLine. 2016. Vol. 49. No. 12. P. 221-225.

We consider a problem of the astronaut training scheduling. Each astronaut has his own set of tasks which should be performed with respect to resource and time constraints. The problem is to determine start moments for all considered tasks. For this issue a mathematical model based on integer linear programming is proposed. Computational results of the implemented model and experiments on real data are presented.

Добавлено: 31 октября 2016
Статья
Logvenkov S. A., Stein A. Biofizika. 2017. Vol. 62. No. 6. P. 926-934.

 

Предложена общая континуальная модель среды, составленной механически активными клетками. Среда считается состоящей из трех фаз; собственно клеток, внеклеточной жидкости и дополнительной фазой, отвечающей за активное силовое взаимодействие между клетками, которая, в частности, может соответствовать системе протрузий, обеспечивающих развитие активных стягивающих усилий. Деформация среды, отождествляемая с деформацией клеточной фазы, состоит из двух составляющих: упругой деформации отдельных клеток и клеточных переупаковок. Упругая деформация связана с напряжением в клеточной фазе. Шаровая составляющая тензора напряжений описывает нелинейное сопротивление клеточной фазы, обеспечивающее невозможность ее слишком большого сжатия. Уравнение состояния для давления в клеточной фазе принято в виде нелинейной зависимости от объемной плотности клеток. Переупаковка клеток рассматривается как течение, управляемое напряжениями в клеточной фазе, активными напряжениями и давлением жидкости. Тензор активных напряжений полагается шаровым и нелокально зависящим от плотности клеток. В предположении медленности процесса деформирования биологической ткани получена редуцированная модель, в которой пренебрегается упругими деформациями клеток по сравнению с неупругими. Проведен дисперсионный анализ устойчивости пространственно-однородного стационарного решения. Среди параметров, отвечающих за потерю устойчивости, присутствует гидростатическое давление жидкости, возрастание которого приводит к неустойчивости за счет составляющей силы межфазного взаимодействия, обусловленной этим давлением. Полученная модель используется для описания процесса образования полости в первоначально однородном клеточном сфероиде. Исследована роль локального и нелокального механизмов развития активных напряжений при формировании полости.

 

Добавлено: 30 декабря 2017
Статья
Ivanov A., Khorov E., Lyakhov A. Automation and Remote Control. 2017. Vol. 78. No. 11. P. 1978-1990.

To improve the reliability of data delivery, in Wi-Fi networks stations can reserve for their transmissions periodic time intervals of the same duration in which they are allowed to transmit, while adjacent stations do not have that right. Here there arises the problem of choosing the parameters of reserved intervals that would ensure quality of service requirements for transmitted data in the smallest possible amount of reserved channel time. We consider the data transmission process in periodic intervals with the block acknowledgement policy that lets us reduce the costs by acknowledgement the set of packets with a single service message. We propose a method for mathematical modeling of such a transmission.

Добавлено: 8 февраля 2018
Статья
Maslov V. Mathematical notes. 2013. Vol. 94. No. 4. P. 532-546.

It is well known that the supercritical state of a gas has great dissolving capacity. In this paper, the mathematical reason for this phenomenon is studied in great detail.

Добавлено: 18 ноября 2013
Статья
Shitov Y. Journal of Combinatorial Theory, Series A. 2016. Vol. 141. P. 127-135.
Добавлено: 9 марта 2016
Статья
Sarpong D., Maclean M., Davies C. European Management Journal. 2013. Vol. 31. No. 6. P. 613-625.
Добавлено: 19 октября 2015
Статья
Zhitlukhin M. Statistics and Decisions. 2009. Vol. 27. No. 3. P. 261-280.
Добавлено: 12 февраля 2014
Статья
Catonini E., Battigalli P., Lanzani G. et al. Games and Economic Behavior. 2019.
Добавлено: 15 февраля 2019
Статья
Bernstein S. Past and Present. 2019. Vol. 242. No. 1. P. 193-226.
Добавлено: 19 октября 2017
Статья
Stanforth R., Mirkin B., Kolossov E. QSAR and Combinatorial Science. 2007. Vol. 26. No. 7. P. 837-844.
Добавлено: 27 августа 2009
Статья
Kossov V. V. Studies on Russian Economic Development. 2016. Vol. 27. No. 6. P. 668-676.

This paper describes the forecasting of crude oil prices for the next few years. This forecast is essential to strategic investors' understanding of the price at which it will be possible to sell the goods in which theyhave invested.

Добавлено: 2 марта 2017
Статья
Noble B. H. Post-Communist Economies. 2017. Vol. 29. No. 4. P. 505-522.
Добавлено: 7 ноября 2018
Статья
Sheldon K. M., Nichols C. P., Kasser T. Ecopsychology. 2011. No. 3. P. 97-104.
Добавлено: 15 сентября 2014