Ходьба по канату: азиатское сообщество в Лондоне /

The article presents a survey of the history and relationships of migrants from the South Asia and China in Britain. Their competitive character is underlined. The Chinese diaspora is regarded as a relatively isolated community with high educational and social requests. A review of public sources allows making a conclusion about the desire of the Chinese youth for assimilation and, at the same time, exists the opposite tendency to preserve the national identity.Делается обзор истории и взаимоотношений мигрантов из южной Евразии в Британии. Подчеркивается их конкурентный характер. Китайская диаспора рассматривается как относительно изолированное сообщество с высокими образовательными и социальными запросами. Обзор общедоступных источников позволяет сделать вывод о стремлении китайской молодежи к ассимиляции и, одновременно, противоположной тенденции к сохранению национальной идентичности

Dire wolves were the last of an ancient New World canid lineage

Dire wolves are considered to be one of the most common and widespread large carnivores in Pleistocene America1, yet relatively little is known about their evolution or extinction. Here, to reconstruct the evolutionary history of dire wolves, we sequenced five genomes from sub-fossil remains dating from 13,000 to more than 50,000 years ago. Our results indicate that although they were similar morphologically to the extant grey wolf, dire wolves were a highly divergent lineage that split from living canids around 5.7 million years ago. In contrast to numerous examples of hybridization across Canidae2,3, there is no evidence for gene flow between dire wolves and either North American grey wolves or coyotes. This suggests that dire wolves evolved in isolation from the Pleistocene ancestors of these species. Our results also support an early New World origin of dire wolves, while the ancestors of grey wolves, coyotes and dholes evolved in Eurasia and colonized North America only relatively recently

Origins and genetic legacy of prehistoric dogs

Dogs were the first domestic animal, but little is known about their population history and to what extent it was linked to humans. We sequenced 27 ancient dog genomes and found that all dogs share a common ancestry distinct from present-day wolves, with limited gene flow from wolves since domestication but substantial dog-to-wolf gene flow. By 11,000 years ago, at least five major ancestry lineages had diversified, demonstrating a deep genetic history of dogs during the Paleolithic. Coanalysis with human genomes reveals aspects of dog population history that mirror humans, including Levant-related ancestry in Africa and early agricultural Europe. Other aspects differ, including the impacts of steppe pastoralist expansions in West and East Eurasia and a near-complete turnover of Neolithic European dog ancestry

Recruitment of the suitable administrative personnel for the company X

The goal of the research paper is to complete a requested task from the managers of the case company X. The issues covered in the paper are related to turnover of the administrative staff, retention of the employees and the recruitment process. The aim of the research is to answer questions about the improvement of the company’s processes related to the human resource management. The structure of the thesis is the following: 1) Introduction, 2) Theoretical aspects of the stated issues, 3) Methodology, 4) Results of the empirical data collection, 5) Suggestions on the improvements of the situation for the given period of time. The methodology for collecting the primary data is questionnaires, personal interviews; the secondary data has been researched through the special literature and other sources. The results of the research include the description of the employees’ experiences, suggestions and desires. In addition, the results contain possible solutions for improving the company’s retention rate and recruitment processes

Application of a Volterra quadratic polynomial to modeling elements of heat engineering devices

This paper considers integral models built to describe dynamic processes in a 135 MW power unit condenser. For this purpose, we use a quadratic segment of the Volterra integral power series. The first set of models was built with a perturbation of the cooling water flow, and the second one with a perturbation of the steam flow. For all sets of models, changes in pressure and temperature in the condenser, as well as temperature changes in LHP-1, were considered as a response to perturbation. For models built with perturbation of the cooling water flow velocity, we considered an extreme problem of finding optimal amplitudes of the input perturbations. The results of calculations proved to be sufficiently accurate

Studying the complexity of identification of Volterra kernels for the case of a vector input signal of arbitrary dimension

The work discusses the technique for constructing an integral model of a nonlinear dynamic system with a vector input based on Volterra polynomials as applied to a section of the steam-water path of the power unit of the Nazarovo power station. The complexity of the applying the technique presented in the work is analyzed, and the number of initial data required to build a mathematical model in the case of a vector input disturbance with an arbitrary dimension is calculated

Identification of Quadratic Volterra Polynomials in the “Input–Output” Models of Nonlinear Systems

In this paper, we propose a new algorithm for constructing an integral model of a nonlinear dynamic system of the “input–output” type in the form of a quadratic segment of the Volterra integro-power series (polynomial). We consider nonparametric identification of models using physically realizable piecewise linear test signals in the time domain. The advantage of the presented approach is to obtain explicit formulas for calculating the transient responses (Volterra kernels), which determine the unique solution of the Volterra integral equations of the first kind with two variable integration limits. The numerical method proposed in the paper for solving the corresponding equations includes the use of smoothing splines. An important result is that the constructed identification algorithm has a low methodological error