京都大学 / 新制・課程博士 / 博士(理学) / 甲第25090号 / 理博第4997号 / 新制||理||1714(附属図書館) / 京都大学大学院理学研究科数学・数理解析専攻 / (主査)教授 COLLINSBenoit Vincent Pierre, 教授 泉 正己, 准教授 窪田 陽介 / 学位規則第4条第1項該当 / Doctor of Agricultural Science / Kyoto University / DFAM

Das Handbuch umfasst ein Einführungskapitel und insgesamt fünf verschiedene Teile mit jeweils drei (im Teil 1: vier) Beiträgen von verschiedenen Autoren. Teil 1 befasst sich mit Rationalität und Entscheidungsfindung, Teil 2 mit Netzwerken und Ungleichheit, Teil 3 mit Gemeinschaften und sozialer Kohäsion, Teil 4 mit Staaten und Konflikten und schließlich Teil 5 mit Märkten und Organisationen. Die Beiträge stammen von 27 Autor- Innen, in der Mehrzahl aus der Soziologie. Die anderen Autoren sind Psychologen, Ökonomen, Politikwissenschaftler oder Statistiker und Methodiker. In erster Linie sind die AutorInnen in den Niederlanden tätig, aber auch AutorInnen aus Großbritannien und den USA sind vertreten.

<p dir="ltr">Let (R,m) be a Noetherian local ring and I an ideal with finite projective dimension. If R/I satisfies some property P, it is natural to ask whether R would also satisfy this property P. This is called the generalized deformation problem. In this paper we discuss some properties that would satisfy this problem. There are two main parts for this paper. In the first part we focus on F-singularities of characteristic p. We show that F-injective satisfies this problem for the Cohen-Macaulay ring case and F-rational satisfies this problem for the excellent ring case. In the second part there is no restriction on the characteristic of R, we show that when R is catenary and equidimensional with I perfect, then the Serre's Condition R_k would satisfy the problem. And the Serre's Condition Sk, R_k+S_{k+1}, normal rings, reduced rings and domains would always satisfy this problem.</p>

The goals of this research were 1) to produce hydrogen in high yields from cellulosic materials and water by synthetic pathway biotranformation (SyPaB), and 2) to increase the hydrogen production rate to a level comparable to microbe-based methods (~ 5 mmol H2/L/h). Cell-free SyPaB is a new biocatalysis technology that integrates a number of enzymatic reactions from four different metabolic pathways, e.g. glucan phosphorylation, pentose phosphate pathway, gluconeogenesis, and hydrogenase-catalyzed hydrogen production, so as to release 12 mol hydrogen per mol glucose equivalent. To ensure the artificial enzymatic pathway would work for hydrogen production, thermodynamic analysis was firstly conducted, suggesting that the artificial enzymatic pathway would spontaneously release hydrogen from cellulosic materials. A kinetic model was constructed to assess the rate-limited step(s) through metabolic control analysis. Three phosphorylases, i.e. α-glucan phosphorylase, cellobiose phosphorylase, and cellodextrin phosphorylase, were cloned from a thermophile Clostridium thermocellum, and heterologously expressed in Escherichia coli, purified and characterized in detail. Finally, up to 93% of hydrogen was produced from cellulosic materials (11.2 mol H2/mol glucose equivalent). A nearly 20-fold enhancement in hydrogen production rates has been achieved by increasing the rate-limiting hydrogenase concentration, increasing the substrate loading, and elevating the reaction temperature slightly from 30 to 32°C. The hydrogen production rates were higher than those of photobiological systems and comparable to the rates reported in dark fermentations. Now the hydrogen production is limited by the low stabilities and low activities of various phosphorylases. Therefore, non-biologically based methods have been applied to prolong the stability of α-glucan phosphorylases. The catalytic potential of cellodextrin phosphorylase has been improved to degrade insoluble cellulose by fusion of a carbohydrate-binding module (CBM) family 9 from Thermotoga maritima Xyn10A. The inactivation halftime of C. thermocellum cellobiose phosphorylase has been enhanced by three-fold at 70°C via a combination of rational design and directed evolution. The phosphorylases with improved properties would work as building blocks for SyPaB and enabled large-scale enzymatic production of cellulosic hydrogen. / Ph. D.

This research project assesses the continued utility of Allison's three policy-making models in analyzing contemporary foreign policy problems. It also explores the effect of cultural considerations on Allison's concepts by delving into the unique themes of Japanese politics. The climate in which this policy decision is made is framed through a discussion of the strategic environment and Japanese defense policy following the Cold War and 9/11. The rational actor, organizational process, and bureaucratic politics models are applied to Japan's 2003 decision to field a missile defense system through a qualitative analysis of English-language secondary hard-copy and online sources. Some Japanese government materials are reviewed as well; the Japanese language, however, presented challenges to research. Despite the expectation that the rational actor model best describes the Japanese approach to missile defense, this project shows the true value of Allison's theories lies in their capacity to expose issues relevant to policy problems from varying perspectives. Japan's missile defense policy likely resulted from a combination of the three models, each influenced in varying degrees by the cultural aspects of Japanese politics. / Master of Arts

Thesis advisor: Dawei Chen / We investigate the count of meromorphic differentials on the Riemann sphere pos-sessing a single zero, multiple poles with prescribed orders, and fixed residues at each pole. Gendron and Tahar previously examined this problem with respect to general residues using flat geometry, while Sugiyama approached it from the perspective of fixed-point multipliers of polynomial maps in the case of simple poles. In our study, we employ intersection theory on compactified moduli spaces of differentials, enabling us to handle arbitrary residues and pole orders, which provides a complete solution to this problem. We also determine interesting combinatorial properties of the solution formula. This thesis is organized as follows: In Chapter 1 we give an introduction to the problem and summarize the main results obtained. In Chapter 2 we review the compactification of moduli spaces of differentials and introduce various divisor classes. In Section 2.3 we explain how to identify the universal line bundle class with the divisor class of the locus of differentials satisfying a general given residue tuple and prove Theorem 1.0.1 (i). In Section 2.4 we impose exactly one independent partial sum vanishing condition to the residues and prove Theorem 1.0.1 (ii). In Section 2.5 we give a polynomial expression in terms of the zero order for the degree of mixed products between powers of the dual tautological class and the psi-class of the zero. Finally in Chapter 3 we prove Theorem 1.0.2 for arbitrary residues and investigate combinatorial properties of the solution formula. We have also verified our formula numerically for a number of cases by using the software package [CMZ2]. / Thesis (PhD) — Boston College, 2024. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Mathematics.

This study utilized a pre-, post-, follow-up design for comparison between treatment and control groups to determine the impact of differential treatments upon assertive behavior and locus of control in adult women. The treatments were designed to separate the following assertion training procedures: assertion training, rational-emotive techniques, and rational-emotive techniques paired with assertion training. A one-way ANOVA performed at pre-test time showed no significant differences between groups prior to treatment. Repeated measures ANOVA were computed for all times of testing across all treatments. Significant (p<.05) movement towards an internal locus of control, as measured by the Rotter Internal-External Scale, was found for the assertion/rational-emotive group and the assertion group across pre- to post-test time. No significance was found for the treatment or time/treatment interaction effects with the Rotter. No significance was found for increases in reported assertive behavior, as measured by the Rathus Assertiveness Schedule, across all times and treatments. Significance (p<.05) was found for observed assertive behavior, as measured by the Behavioral Observation Checklist, for the assertion and assertion/rational-emotive group for time/treatment interaction. The Behavioral Observation Checklist was an instrument developed by ~he researcher of this study. Spearman-Brown split-half reliability testing demonstrated the Checklist to be a reliable instrument. Inter-rater reliability was also demonstrated. / Doctor of Education

Dynamical systems are a commonly used and studied tool for simulation, optimization and design. In many applications such as inverse problem, optimal control, shape optimization and uncertainty quantification, those systems typically depend on a parameter. The need for high fidelity in the modeling stage leads to large-scale parametric dynamical systems. Since these models need to be simulated for a variety of parameter values, the computational burden they incur becomes increasingly difficult. To address these issues, parametric reduced models have encountered increased popularity in recent years. We are interested in constructing parametric reduced models that represent the full-order system accurately over a range of parameters. First, we define a global joint error mea- sure in the frequency and parameter domain to assess the accuracy of the reduced model. Then, by assuming a rational form for the reduced model with poles both in the frequency and parameter domain, we derive necessary conditions for an optimal parametric reduced model in this joint error measure. Similar to the nonparametric case, Hermite interpolation conditions at the reflected images of the poles characterize the optimal parametric approxi- mant. This result extends the well-known interpolatory H2 optimality conditions by Meier and Luenberger to the parametric case. We also develop a numerical algorithm to construct locally optimal reduced models. The theory and algorithm are data-driven, in the sense that only function evaluations of the parametric transfer function are required, not access to the internal dynamics of the full model. While this first framework operates on the continuous function level, assuming repeated transfer function evaluations are available, in some cases merely frequency samples might be given without an option to re-evaluate the transfer function at desired points; in other words, the function samples in parameter and frequency are fixed. In this case, we construct a parametric reduced model that minimizes a discretized least-squares error in the finite set of measurements. Towards this goal, we extend Vector Fitting (VF) to the parametric case, solving a global least-squares problem in both frequency and parameter. The output of this approach might lead to a moderate size reduced model. In this case, we perform a post- processing step to reduce the output of the parametric VF approach using H2 optimal model reduction for a special parametrization. The final model inherits the parametric dependence of the intermediate model, but is of smaller order. A special case of a parameter in a dynamical system is a delay in the model equation, e.g., arising from a feedback loop, reaction time, delayed response and various other physical phenomena. Modeling such a delay comes with several challenges for the mathematical formulation, analysis, and solution. We address the issue of transient behavior for scalar delay equations. Besides the choice of an appropriate measure, we analyze the impact of the coefficients of the delay equation on the finite time growth, which can be arbitrary large purely by the influence of the delay. / Ph. D. / Mathematical models play an increasingly important role in the sciences for experimental design, optimization and control. These high fidelity models are often computationally expensive and may require large resources, especially for repeated evaluation. Parametric model reduction offers a remedy by constructing models that are accurate over a range of parameters, and yet are much cheaper to evaluate. An appropriate choice of quality measure and form of the reduced model enable us to characterize these high quality reduced models. Our first contribution is a characterization of optimal parametric reduced models and an efficient implementation to construct them. While this first framework assumes we have access to repeated evaluations of the full model, in some cases merely measurement data might be available. In this case, we construct a parametric model that fits the measurements in a least squares sense. The output of this approach might lead to a moderate size reduced model, which we address with a post-processing step that reduces the model size while maintaining important properties. A special case of a parameter is a delay in the model equation, e.g., arising from a feedback loop, reaction time, delayed response and various other physical phenomena. While asymptotically stable solutions eventually vanish, they might grow large before asymptotic behavior takes over; this leads to the notion of transient behavior, which is our main focus for a simple class of delay equations. Besides the choice of an appropriate measure, we analyze the impact of the structure of the delay equation on the transient growth, which can be arbitrary large purely by the influence of the delay.

Michael Hechter gilt gemeinhin als ein – wenn nicht der – Doyen der Rational Choice Theorie (im Folgenden: RCT) in der Soziologie. Da es höchst unterschiedliche Vorstellungen darüber gibt, wie sich Annahmen über die Rationalität von Akteuren in der sozialwissenschaftlichen Theoriebildung oder der empirischen Sozialforschung einsetzen lassen, liegt es nahe, sich zu fragen, welche zentralen Merkmale Michael Hechters Variante der RCT auszeichnen. Der 2019 erschienene Band „Rational Choice Sociology. Essays on Theory, Collective Action and Social Order“ bietet eine willkommene Gelegenheit, sich mit seinem Werk und insbesondere seiner Konzeption der RCT auseinanderzusetzen.

Text in Afrikaans / Students who study part time find themselves in a situation, with much pressure, which causes stress. The reason for this study was therefore to investigate the effectiveness of Rational Emotive Therapy as a coping technique for students in order to handle stress. A qualitative analysis was conducted and data was gathered primarily through group therapy and interviewing. The results of the research led to the conclusion that Rational Emotive Therapy could be effectively applied by students as a stresscoping mechanism / Educational Studies / M.Ed.