Understand the behavior of queueing networks in heavy tra c is very important due to its importance in evaluating the network performance in related applications. However, in many cases, the stationary distributions of such networks are intractable. Based on di usion limits of queueing networks, we can use Re ected Brownian Motion (RBM) processes as reasonable approximations. As such, we are interested in obtaining the stationary distribution of RBM. Unfortunately, these distributions are also in most cases intractable. However, the tail behavior (large deviations) of RBM may give insight into the stationary distribution. Assuming that a large deviations principle holds, we need only solve the corresponding variational problem to obtain the rate function. Our research is mainly focused on how to solve variational problems in the case of rotationally symmetric (RS) data. The contribution of this dissertation primarily consists of three parts. In the rst part we give out the speci c stability condition for the RBM in the octant in the RS vi case. Although the general stability conditions for RBM in the octant has been derived previously, we simplify these conditions for the case we consider. In the second part we prove that there are only two types of possible solutions for the variational problem. In the last part, we provide a simple computational method. Also we give an example under which a spiral path is the optimal solution. / text

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Looking at newspapers nowadays, you are likely to see reports about public projects which turn out to be more expensive than estimated, sometimes even fourteen times the planned cost budget as in the case of the Sydney Opera. In order to gain a new insight on how this problematic could be improved, this paper aims to find correlations between the causes of deviations in public procurement and in the private market. Data from a on a global scale operating firm has been analyzed and compared to causes found in prior research. The questions this paper aims to answer are “Are causes and correlations found in smaller, private projects consistent with causes of cost overruns in public procurement?” and “Which implications and recommendations can be derived from the smaller dimension for the larger dimension of public procurement?”   After introducing the theoretical framework and its theories, the individual cost deviations and correlations of the different segments are introduced and analysed. As a result, one can see how the rational behaviour model and asymmetric information influence the estimated cost and that, in order to decrease the problematic of cost overruns, estimation techniques and especially the way contracts are constructed have to be improved. Furthermore, positive correlations between the size of cost deviations and number of employees, possible chain of events and pay offs between

This thesis deals with a) The investigation of the problem of clumsiness resulting from developmental apraxia and agnosia ; b) the development of effective screening tests particularly suitable for employment by medical practitioners and specialist schoolteachers for the identification of these children. Chapter 2 reports the detailed initial investigation in Great Britain of 21 such clumsy children who had been referred for diagnosis and management. This study in turn stimulated a clinical survey of developmental clumsiness in Western Australian schoolchildren described and analysed in Chapters 3 and 4. It was anticipated that this survey would yield information regarding the magnitude of the problem and would provide normative data regarding motor performance in children. Subsequently these data were to be the basis of a set of standardized tests of motor proficiency in children (Chapter 4). In order to obtain information efficiently and to develop these tests it seemed most rational to commence with a pilot study of a relatively small number of children, when after statistical analysis it would become evident which tests were the most reliable, effective and convenient (Chapter 3). A comprehensive review of the subject of developmental apraxia and agnosia constitutes the final chapter of this thesis (Chapter 5).

Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--University of California, San Diego, 1998. / Vita. Includes bibliographical references (leaves 114-116).

Thesis of (M.A.)--University of Alberta, 2009. / Title from pdf file main screen (viewed on October 1st, 2009). "Fall, 2009." At head of title: University of Alberta. A thesis submitted to the Faculty of Graduates Studies and Research in partial fulfillment of the requirements for the degree of Master of Education, in Psychological Studies in Education, Department of Educational Psychology, University of Alberta. Includes bibliographical references.

Thesis--New York University. / Photocopy of typescript. Ann Arbor, Mich. : University Microfilms International, 1977. -- 21 cm. Includes bibliographical references (leaves 73-80).

This is a report of a descriptive study of eleven video-taped diagnostic conferences involving parents of developmentally delayed children who have been assessed at a training facility which provides diagnostic services to a variety of delayed or handicapped children. The variables described were: (1) the amount of verbal participation of staff and parents; and (2) parent ratings of satisfaction obtained from a brief questionnaire administered orally. The data revealed that. (1) there is no relationship between parent verbal participation and parent satisfaction with the conference; and (2) there is a relationship between parent satisfaction and process and content factors in the parent conference.

We explore the effect of multiscale structure on weakly interacting diffusions through two main projects. In the first, we consider a collection of weakly interacting diffusion processes moving in a two-scale locally periodic environment. We study the large deviations principle of the empirical distribution of the particles' positions in the combined limit as the number of particles grow to infinity and the time-scale separation parameter goes to zero simultaneously. We make use of weak convergence methods providing a convenient representation for the large deviations rate function, which allow us to characterize the effective controlled mean field dynamics. In addition, we obtain equivalent representations for the large deviations rate function of the form of Dawson-G\"artner which hold even in the case where the diffusion matrix depends on the empirical measure and when the particles undergo averaging in addition to the propagation of chaos. In the second, we consider a fully-coupled slow-fast system of McKean-Vlasov SDEs with full dependence on the slow and fast component and on the law of the slow component and derive convergence rates to its homogenized limit. We do not make periodicity assumptions, but we impose conditions on the fast motion to guarantee ergodicity. In the course of the proof we obtain related ergodic theorems and we gain results on the regularity of Poisson type of equations and of the associated Cauchy-Problem on the Wasserstein space that are of independent interest.