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Найдено 54 817 публикаций
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Статья
Behrens K. Journal of Urban Economics. 2004. No. 55. P. 68-92.
Добавлено: 20 ноября 2013
Статья
Bernstein S., Makhalova I. The Soviet and Post-Soviet Review. 2019. Vol. 46. No. 1. P. 30-54.
Добавлено: 9 октября 2018
Статья
Romanenko A. Springer Proceedings in Mathematics & Statistics. 2015. P. 137-146.
Добавлено: 6 декабря 2018
Статья
Butovskaya Marina, Vasilyev V., Lazebny O. Behavior Genetics. 2012. Vol. 42. No. 4. P. 647-662.

Abstract The role of genes in the expression of aggression and masculinity traits in humans has been a focus of recent behavioral genetic studies. This is the first study on the variation in aggression, the digit ratio (the ratio between the second and the fourth digits, 2D:4D), the directional asymmetry in 2D:4D (DR-L) and polymorphisms of the AR, DRD4, and 5-HTTL genes in simple hunter-gatherers, namely the Hadza of Tanzania (142 adult men). The distribution of AR, DRD4E3, and 5-HTTLPR genotypes and allele frequencies in Hadza was compared to other African populations on which the data were available. Hadza and Ariaal differed significantly in the distributions of frequencies of AR alleles with different numbers of CAG repeats. Hadza population was similar to other African populations in the distribution of allelic frequencies of the DRD4E3 locus, and to Afro- Americans in the distribution of allelic types of the 5- HTTLPR locus. We found no influence of AR gene on the right hand 2D:4D ratio,DR-L, and any of aggression subscales of the Buss-Perry Aggression Questionnaire (AQ). Although, a weak positive correlation between CAG repeats and the left hand 2D:4Dwas found. The multiple regression analysis with digit ratios, DR-L and aggression subscales of AQ as dependent variables and the three gene candidates (AR, DRD4E3, and 5-HTTLPR) as independent variables revealed the following: men with lower number of CAG repeats had significantly lower left hand2D:4D ratio;men with highernumbers of 48-bp unit copies in exon 3 of a VNTR polymorphism in the DRD4 gene had significantly lower digit ratios on both hands; no effect of the 5-HTTLPR gene on either the digit ratio or aggressive behavior. These findings demonstrate the complexity of gene effects on digit ratios and aggression and call for simultaneous analysis of more candidate genes. It is noteworthy that these results were obtained for a human population that is still practicing foraging and has been subjected to a high selective pressure due to harsh environments and practically has no access to modern medical care. Hadza are highly egalitarian, and their culture does not favor persons with a dominant or aggressive behavior. It is still to be found to what extent the relationships observed in this study are similar to those in other human populations.

Добавлено: 10 октября 2014
Статья
Zelenkov Y. Business Informatics. 2018. No. 2. P. 30-44.
Добавлено: 14 июля 2018
Статья
Priezjev N. Computational Materials Science. 2019. Vol. 168. P. 125-130.
Добавлено: 2 мая 2019
Статья
Safdari H., Cherstvy A., Chechkin A. et al. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics. 2017. Vol. 95. P. 012120-1-012120-15.
Добавлено: 18 апреля 2019
Статья
Sircova A., van de Vijver F., Osin E. N. et al. Sage Open. 2014. Vol. 4.

In this article we assess the structural equivalence of the Zimbardo Time Perspective Inventory (ZTPI; Zimbardo & Boyd, 1999) across 26 samples from 24 countries (N = 12,200). The ZTPI is proven to be a valid and reliable index of individual differences in time perspective across five temporal categories: Past-Negative, Past-Positive, Present-Fatalistic, Present-Hedonistic, and Future. We obtained evidence for invariance of 36 items (out of 56) and also the five-factor structure of ZTPI across 23 countries. The short ZTPI scales are reliable for country-level analysis, whereas we recommend the use of the full scales for individual-level analysis. The short-version of ZTPI will further promote integration of research in the time perspective domain in relation to many different psycho-social processes.

Добавлено: 13 ноября 2013
Статья
Gafarov E. R., Dolgui A., Lazarev A. A. et al. Journal of Mathematical Modelling and Algorithms in Operations Research. 2014. Vol. 13. No. 4. P. 597-614.

We consider a project investment problem, where a set of projects and an overall budget are given. For each project, a piecewise linear profit function is known which describes the profit obtained if a specific amount is invested into this project. The objective is to determine the amount invested into each project such that the overall budget is not exceeded and the total profit is maximized. For this problem, a graphical algorithm (GrA) is presented which is based on the same Bellman equations as the best known dynamic programming algorithm (DPA) but the GrA has several advantages in comparison with the DPA. Based on this GrA, a fully-polynomial time approximation scheme is proposed having the best known running time. The idea of the GrA presented can also be used to solve some similar scheduling or lot-sizing problems in a more effective way, e.g., the related problem of finding lot-sizes and sequencing several products on a single imperfect machine.

Добавлено: 10 ноября 2014
Статья
Lazarev A. A., Werner F. Computers & Mathematics with Applications. 2009. No. 58. P. 619-631.

In this paper we consider a graphical realization of dynamic programming. The concept is discussed on the partition and knapsack problems. In contrast to dynamic programming, the new algorithm can also treat problems with non-integer data without necessary transformations of the corresponding problem. We compare the proposed method with existing algorithms for these problems on small-size instances of the partition problem with n.

Добавлено: 24 ноября 2012
Статья
Shepotylo O. Journal of Economic Integration. 2010. Vol. 25. No. 4. P. 676-702.

This paper develops a methodology for trade policy analysis of costs and benefits of alternative regional integration scenarios. The methodology is based on the disaggregated gravity equation, which is applied to calculate the impact of the EU enlargement on integration strategies of non-member countries. In particular, the paper measures the impact of the 2004 EU enlargement from the standpoint of Ukraine - a country that has been lost in transition. This angle allows estimating the costs of non-integration that occurred due to trade and investment diversion, and forgone opportunity to carry out structural changes in the Ukrainian economy. According to the results, the EU accession would have had a positive effect on total export volumes and would have changed the composition of Ukrainian exports by almost doubling exports of manufactured goods by 2007. The costs of non-integration accumulate towards the end of the investigated period. Projecting the results into the future clearly indicates that the benefits of the EU accession for Ukraine would have been unambiguously positive and would overweight benefits of the CIS integration.

Добавлено: 19 ноября 2013
Статья
Rudnev P. Linguistic Inquiry. 2019.
Добавлено: 26 июля 2018
Статья
Letuchiy A. RHEMA. 2016. No. 4. P. 83-104.

В статье рассматривается необычное свойство адыгейских сентенциальных актантов. В отличие от сентенциальных актантов русского и многих других языков, адыгейские сентенциальные актанты в сочинённой группе могут контролировать согласование по числу. Однако это согласование наблюдается в довольно малом числе синтаксических контекстов. Мы анализируем факторы, способствующие и препятствующие согласованию, и выясняем, что возможность согласования зависит, в первую очередь, от синтаксической позиции сентенциального актанта и от стратегии его оформления.

Добавлено: 9 февраля 2017
Статья
Nichols J. Linguistics. 2018. Vol. 56. No. 4. P. 845-863.
Добавлено: 5 сентября 2018
Статья
Leonid V. Azarnert. Open Economies Review. 2014. Vol. 25. No. 4. P. 797-807.
Добавлено: 10 марта 2016
Статья
Barsukova S. Social Sciences. 2017. Vol. 48. No. 4. P. 3-18.

В центре внимания статьи - аграрная политика России. Общая идея: политизация аграрной политика является причиной стагнации сельского хозяйства

Добавлено: 30 июня 2018
Статья
Platonova N. CT Catastro. 2017. No. 90. P. 9-44.

В статье рассматриваются вопросы генерального межевания земель в Российской империи.

Добавлено: 28 июля 2018
Статья
M.Bershtein, Foda O. Journal of High Energy Physics. 2014. Vol. 06. No. 177.
Добавлено: 9 сентября 2014
Статья
Eminov P. A., Sezonov Y. I., Ul’din A. Russian Journal of Mathematical Physics. 2009. Vol. 16. No. 4. P. 563-565.
Добавлено: 31 декабря 2012
Статья
Budnitskii O. Kritika: Explorations in Russian and Eurasian History. 2018. Vol. 19. No. 1. P. 175-202.
Добавлено: 1 марта 2018
Статья
Syed M., Georgiev P. G., Pardalos P. M. Computers & Operations Research. 2014. Vol. 41. P. 386-398.

В данной статье описывается задача слепого разделения сигналов (BSS): дано  X∈Rm×N, задача BSS используется, чтобы найти A∈Rm×n и S∈Rn×N, где матрицы связаны как X=AS. Мы рассмотрели достаточные условия для структуры X, A и S с точки зрения редкости условий S, таких, что уравнение может быть решено однозначно (с точностью до перестановки и масштабируемости).  Предлагается хиерархический 0-1 MIP для решения данной задачи. Вероятно, мы показали, что каждый последующий уровень иерархической MIP будет легче решить, чем предшествующий  уровень MIP. Более того, мы представили тематические исследования, которые поясняют эффективность предложенного подхода решения для коррелированных редких источников.

Добавлено: 31 декабря 2012