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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Дифференциальная игра c простыми движениями на плоскости и ее нелинейная модификация : магистерская диссертация / A differential game with simple motions on the plane and its nonlinear modification

Загреева, С. Р., Zagreeva, S. R. January 2017 (has links)
The work is devoted to the analytic construction of solvability sets (the maximal stable bridges) in two examples of antagonistic differential games. In the first example, the control system is described by the dynamics of simple motions. The sections of the solvability sets at given time are defined on the basis of the terminal set and sets restricting the players' controls by means of the algebraic sum and the geometric difference. In the proof, we construct optimal strategies of the players explicitly. In the second example, we consider the system with modified dynamics, in which the possibilities capabilities of the second player depend on the phase position of the system. The investigation is carried out by means of the characteristic system of the Hamilton–Jacobi–Isaacs equation. We found conditions on the parameters of the problem under which the boundary of the solvability set is smooth. For the remaining values of the parameters, we found a qualitative picture of the, which is similar to the solution in the first example and has a scattering line. The obtained results can be used as a basis for further analytical studies of differential games with the dependence of the players' possibilities on the phase position of the system as well as for the development of numerical methods for solving such problems. / Работа посвящена аналитическому построению множеств разрешимости (максимальных стабильных мостов) в двух примерах антагонистических дифференциальных игр. В первом примере управляемая система описывается динамикой простых движений. Сечения множеств разрешимости в заданный момент времени определяются на основе терминального множества и множеств, ограничивающих управления игроков, с помощью операций алгебраической суммы и геометрической разности. Доказательство проводится при помощи явного построения оптимальных стратегий игроков. Во втором примере рассматривается система с модифицированной динамикой, при которой возможности второго игрока зависят от фазового положения системы. Исследование проводится при помощи характеристической системы уравнения Гамильтона – Якоби – Айзекса. Выделены условия на параметры задачи, при которых граница множества разрешимости является гладкой. Для остальных значений параметров найдена качественная картина решения, которая аналогична решению в первом примере и обладает рассеивающей линией. Полученные результаты могут быть использованы как основа для дальнейших аналитических исследований дифференциальных игр с зависимостью возможностей игроков от фазового положения системы, а также для разработки численных методов решения таких задач.
12

Создание настольной игры на основе книги А. С. Ярцова «Российская горная история» : магистерская диссертация / Creating a Board game based on the book by A. S. Yartsov "Russian mountain history"

Неганова, Е. В., Neganova, E. V. January 2020 (has links)
В диссертации дана краткая историческая справка о происхождении настольных игр, их видах, существующих на сегодняшний день игровых механиках, представлены данные опроса среди продавцов настольных игр. Проанализированы особенности наиболее популярных настольных игр и создана новая уникальная настольная игра, которая является дополнением книги А. С. Ярцова «Российская горная история». / The dissertation provides a brief historical background on the origin of Board games, their types, existing game mechanics, and provides survey data among sellers of Board games. The features of the most popular Board games are analyzed and a new unique Board game is created, which is an addition to the book by A. S. Yartsov "Russian mountain history".
13

Hyperactive Behavior and Participation in Social Play in a Swedish Preschool Context : A Cross-Sectional Study

Pozneanscaia, Cristina January 2020 (has links)
The present thesis sought to compare participation in social types of play of children with and without hyperactivity in a Swedish preschool context. Based upon observational design of cross-sectional type, this study was built on a secondary analysis of data collected within two previous research projects that were merged into one dataset. A total of 583 children (n = 298 boys) aged 16 to 72 months (M = 52.55, SD = 11.01) were initially included in the sample. Preschool teachers rated children’s behavior difficulties on a hyperactivity scale using Strengths and Difficulties Questionnaire (SDQ). Structured observations of children’s attendance, engagement, verbal interaction, proximity and location during associative and cooperative interaction were conducted across day-long visits by three trained researchers using Children Observation in Pre- school (COP) tool. Conditional probability looping syntaxes were created and Independent sample t-Tests were used to analyze the data. Out of 572 children included in the analysis, n = 60 (10,2%) were rated as having some form of hyperactivity. On the whole, the findings illustrated that the observed averages of attendance and overall engagement in social types of play did not differ significantly between children with and without hyperactivity. However, an in-depth analysis of participation patterns, linked to contextual and environmental factors such as proximity and play location, revealed several considerable differences between the two groups of children. It seems that preschoolers with hyperactive behavior seek social play opportunities as much as their typical behavior peers, but the quality aspects of their experience defined by a specific context and environment may differ further as the interaction develops. Contextual and environmental factors are crucial determinants to take into account when studying participation. Play, operating as a natural booster of self-regulation and engagement may have the potential to serve as a mediating factor accommodating hyperactivity and promoting participation in Early Childhood Education settings.

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