Electronic Educational Resources as a Strategic Innovation

В статье рассматривается понятие электронных образовательных ресурсов (ЭОР), описаны дидактические функции данного вида ресурсов, приведены основные типы ЭОР на занятиях по иностранному языку, а также выделены недостатки ЭОР.This article discusses the concept of electronic educational resources (EER), describes the didactic functions of this type of resources, presents the main types of EER in foreign language classes, and highlights the disadvantages of EER

Synchronization in a System of Globally Coupled Oscillators with Time Delay

We study the synchronization phenomena in a system of globally coupled oscillators with time delay in the coupling. The self-consistency equations for the order parameter are derived, which depend explicitly on the amount of delay. Analysis of these equations reveals that the system in general exhibits discontinuous transitions in addition to the usual continuous transition, between the incoherent state and a multitude of coherent states with different synchronization frequencies. In particular, the phase diagram is obtained on the plane of the coupling strength and the delay time, and ubiquity of multistability as well as suppression of the synchronization frequency is manifested. Numerical simulations are also performed to give consistent results

Stochastic Models of Lymphocyte Proliferation and Death

Quantitative understanding of the kinetics of lymphocyte proliferation and death upon activation with an antigen is crucial for elucidating factors determining the magnitude, duration and efficiency of the immune response. Recent advances in quantitative experimental techniques, in particular intracellular labeling and multi-channel flow cytometry, allow one to measure the population structure of proliferating and dying lymphocytes for several generations with high precision. These new experimental techniques require novel quantitative methods of analysis. We review several recent mathematical approaches used to describe and analyze cell proliferation data. Using a rigorous mathematical framework, we show that two commonly used models that are based on the theories of age-structured cell populations and of branching processes, are mathematically identical. We provide several simple analytical solutions for a model in which the distribution of inter-division times follows a gamma distribution and show that this model can fit both simulated and experimental data. We also show that the estimates of some critical kinetic parameters, such as the average inter-division time, obtained by fitting models to data may depend on the assumed distribution of inter-division times, highlighting the challenges in quantitative understanding of cell kinetics

Сорбция цитокинов и иммуноглобулинов in vitro новым углеродным гемосорбентом (cтендовое испытание)

Objective: to study the specific features of sorption of some protein molecules (cytokines, immunoglobulins) in vitro, by using the carbon hemosorbent designed at the Institute of Hydrocarbon Process Problems, Siberian Branch, Russian Academy of Sciences.Materials and methods. 42 plasma samples from 14 patients with peritonitis were examined before and after hemosorption. Plasma was perfused through the hemosorbent with a plasma:hemosorbent ratio of 10:1 and a 5-cm3-column volume on an УНИРОЛ-1 at a rate of 15 ml/min.Results. The designed hemosorbent was found to absorb proinflammatory cytokines, such as tumor necrosis fac-tor-a and interleukin-1/J more than the hemosorbent VNIITU-1, and to significantly unchange the content of immunoglobulins M, G, and A. The absorptive capacity of the new hemosorbent was 48% greater than that of VNIITU-1.Conclusion. The findings may serve as a guide for further more in-depth studies of the specific features of sorption of plasma protein molecules from critically ill patients, by employingjust this carbon sorbent. Цель исследования . Изучить особенности сорбции некоторых белковых молекул (цитокинов, иммуноглобулинов) in vitro углеродным гемосорбентом, разработанным в Институте проблем переработки углеводородов Сибирского отделения РАН.Материалы и методы. Исследовано 42 пробы плазмы крови от 14 больных перитонитом до и после гемо-сорбции. Перфузию плазмы крови через гемосорбент осуществляли с помощью аппарата УНИРОЛ-1 при скорости 15 мл/мин, соотношении «плазма:гемосорбент» — 10:1 и объеме колонки в 5 см3.Результаты. Установлено, что разработанный гемосорбент поглощает больше таких провоспалительных цитокинов, как фактор некроза опухоли-альфа и ин-терлейкин 1-в, по сравнению с гемосорбентом ВНИИТУ-1, и достоверно не изменяет содержание иммуноглобулинов М, G, А. Сорбционная способность нового гемосорбента на 48% превышает таковую у ВНИИТУ-1.Заключение. Полученные результаты служат основанием для дальнейших углубленных исследований по изучению особенностей сорбции некоторых белковых молекул плазмы крови больных, находящихся в критическом состоянии, именно на этом углеродном сорбенте.

Review and Unification of Methods for Computing Derivatives of Multidisciplinary Systems

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/97061/1/AIAA2012-1589.pd

Interacting pairs of periodic solutions lead to tori in lasers subject to delayed feedback

Models of class-B lasers subject to either an optoelectronic or an optical feedback are investigated analytically and numerically. We derive slow time amplitude equations from the laser delay differential equations and find multiple bifurcating and isolated branches of periodic solutions. We then show that secondary bifurcations to tori result from the interaction of pairs of Hopf bifurcations. The branches emerging from these bifurcations are followed numerically using a continuation method developed for delay differential equations.Journal Articleinfo:eu-repo/semantics/publishe