3,865 research outputs found

    Удовольствие и интерес к игре как основа подхода к проектированию детской игровой площадки

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    The article considers design of children’s playgrounds. The design traditions in modern architectural school are discussed, the problem of “the game” is identified and the term “pleasure” is focused. The conclusion is that we need a new approach to design children’s playgrounds in order to interest children in the age group from six to fifteen.В статье рассматривается проектирование детских игровых площадок. Обсуждаются традиции проектирования в современных архитектурных школах, ставится проблема «игры» и центральное внимание уделяется термину «удовольствие». В заключении делается вывод, что нужен новый подход к проектированию детских игровых площадок, для того чтобы заинтересовать детей возрастом от 6 до 15 лет

    Results from the Commissioning of the ATLAS Pixel Detector

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    The ATLAS pixel detector is the innermost tracking detector of the ATLAS experiment at the Large Hadron Collider (LHC) at CERN. It has a total active area of 1.7 m2 of silicon read out by approximately 80 million electronic channels, which will detect particle tracks and decay vertices with a very high precision. After more than 10 years of development and construction it is the first time ever the whole detector has been operated together. The paper will illustrate the detector performance and give first results from the combined ATLAS cosmics runs

    Results from the commissioning of the ATLAS Pixel Detector with cosmic ray data

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    The ATLAS Pixel Detector is one of the largest silicon pixel hybrid detectors in the world. It has a total active area of 1.7 m^2 of silicon read out every 25 ns by approximately 80 million electronic channels. It is the innermost tracking detector of the ATLAS experiment at the Large Hadron Collider (LHC) at CERN, designed to measure particle tracks and decay vertices with a very high precision and efficiency. Since August 2008, after more than 10 years of development and construction, the whole detector has been operated together. After tuning, calibration and timing-in the detector has demonstrated excellent noise occupancy of 10^(-10) and a tracking hit efficiency greater than 99.7%. The paper will describe the detector performance and discuss the studies performed with cosmic ray data, such as alignment and the Lorentz angle measurement

    On Optimality of Pursuit Time

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    We study a differential game described by an infinite system of differential equations with integral constraints on controls of players. This system is obtained by a parabolic equation by using decomposition method. We obtained an equation to find the optimal pursuit time and examined the series representing the left hand side of the equation. Moreover necessary and sufficient condition for convergence of the series is obtained

    The optimal pursuit problem reduced to an infinite system of differential equations

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    The optimal game problem reduced to an infinite system of differential equations with integral constraints on the players’ controls is considered. The goal of the pursuer is to bring the system into the zeroth state, while the evader strives to prevent this. It is shown that Krasovskii's alternative is realized: the space of states is divided into two parts so that if the initial state lies in one part, completion of the pursuit is possible, and if it lies in the other part, evasion is possible. Constructive schemes for devising the optimal strategies of the players are proposed, and an explicit formula for the optimal pursuit time is derived

    Parameter estimation in pair hidden Markov models

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    This paper deals with parameter estimation in pair hidden Markov models (pair-HMMs). We first provide a rigorous formalism for these models and discuss possible definitions of likelihoods. The model being biologically motivated, some restrictions with respect to the full parameter space naturally occur. Existence of two different Information divergence rates is established and divergence property (namely positivity at values different from the true one) is shown under additional assumptions. This yields consistency for the parameter in parametrization schemes for which the divergence property holds. Simulations illustrate different cases which are not covered by our results.Comment: corrected typo

    Pursuit-evasion differential game with many inertial players

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    We consider pursuit-evasion differential game of countable number inertial players in Hilbert space with integral constraints on the control functions of players. Duration of the game is fixed. The payoff functional is the greatest lower bound of distances between the pursuers and evader when the game is terminated. The pursuers try to minimize the functional, and the evader tries to maximize it. In this paper, we find the value of the game and construct optimal strategies of the players

    On a class of simultaneous pursuit games.

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    Let A and B be given convex closed bounded nonempty subsets in a Hilbert space H; let the first player choose points in the set A and let the second one do those in the set B. We understand the payoff function as the mean value of the distance between these points. The goal of the first player is to minimize the mean value, while that of the second player is to maximize it. We study the structure of optimal mixed strategies and calculate the game value

    An evasion differential game described by an infinite system of 2-systems of second order.

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    We study a differential game of many pursuers described by infinite systems of second order ordinary differential equations. Controls of players are subjected to geometric constraints. Differential game is considered in Hilbert spaces. We say that evasion is possible if ||zi(t)||r+1 + ||z˙i(t)||r 6= 0 for all i = 1, ...,m, and t > 0; m is the number of pursuers. We proved one theorem on evasion. Moreover, we constructed explicitly a control of the evader
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