琵琶湖塩津湾における長周期内部波の動態について

東京海洋大学博士学位論文 平成25年度(2013) 応用環境システム学 課程博士 甲第307号指導教員: 山崎秀勝全文公表年月日: 2014-01-10東京海洋大学201

Persistent Nonviolent Conflict With No Reconciliation: The Flemish and Walloons in Belgium

Mnookin and Verbeke describe the nonviolent but very serious conflict in Belgium between the Flemish (Dutch) of the North and the Walloons (French) of the South. The Flemish economy is more prosperous than the Walloon economy, and the Flemish constitute a majority of the Belgian population. Nevertheless, the Walloons enjoy a financial subsidy from the Flemish and share equally in the political power of the nation due to antimajoritarian restrictions built into the government structure. Even though significant and persistent, this conflict remains nonviolent due to several factors, including largely separate geography, language and social structure; a low-stakes conflict; relatively small wealth disparities; a federal system largely enabling separate political systems; and a pragmatic tradition. Mnookin and Verbeke argue that the disputants can continue to coexist with a civilized separation short of divorce. They further point out that the very factors that help keep this conflict nonviolent also serve to provide little incentive to work toward a more cooperative relationship

The GHZ state in secret sharing and entanglement simulation

In this note, we study some properties of the GHZ state. First, we present a quantum secret sharing scheme in which the participants require only classical channels in order to reconstruct the secret; our protocol is significantly more efficient than the trivial usage of teleportation. Second, we show that the classical simulation of an n-party GHZ state requires at least n log n - 2n bits of communication. Finally, we present a problem simpler than the complete simulation of the multi-party GHZ state, that could lead to a no-go theorem for GHZ state simulation.Comment: 5 page

Efficient Tuition Fees, Examinations, and Subsidies (new title: Efficient tuition fees and subsidies)

We assume that students can acquire a wage premium, thanks to studies, and form a rational expectation of their future earnings, which depends on personal "ability". Students receive a private, noisy signal of their ability, and universities can condition admission decisions on the results of noisy tests. We assume first that universities are maximizing social surplus, and contrast the results with those obtained when they are profit maximizers. If capital markets are perfect, and if test results are public knowledge, then the optimal tuition fee is greater than marginal cost, and there is no sorting on the basis of test scores. Students optimally self-select as a result of pricing only. If capital markets are perfect but asymmetries of information are bilateral, i.e., if universities observe a private signal of each student's ability, or if there are borrowing constraints, then the optimal policy involves a mix of pricing and pre-entry selection on the basis of test scores. Optimal tuition can then be set below marginal cost, and can even become negative, if the precision of the university's private assessment of students' abilities is high enough.tuition fees, examinations, state subsidies, higher education, incomplete information

Le droit des valeurs mobilières et le retour des compagnies publiques au statut de compagnie privée

This article examines the « going private » phenomenon as it has developed in the United States and Canada over the past few years as well as its implications for Quebec law. « Going private » transactions involve different means of corporate reorganization that allow a few controlling shareholders to eliminate, without adequate compensation, most other shareholders from further participation in a corporate body. Such transactions are of interest to those who study company law or securities law as the methods employed often go beyond the spirit of both. The author attempts to demonstrate the role each can play in preventing abuses of minority rights. Corporate law, while ensuring majority rule, seeks to protect individual shareholders while securities law has developed to avoid the manipulation of individual shareholders in transactions involving securities. The author believes that « going private » should take place only if full disclosure of the aims of the controlling group have been given to the minority, if there is a valid business purpose for going private and if the eliminated shareholders are treated fairly. Examples of these criteria are to be found in recent American, Canadian and Quebec jurisprudence as well as in the policy statements of the Securities Exchange Commission and the Ontario Securities Commission. These are analysed in relation to present Quebec law. The author suggests that the Quebec Securities Commission should adopt a policy statement on « going private » similar to that of the OSC. This would be a better means of ensuring that the Quebec Securities Commission fulfill its role of promoting investor protection and an efficient securities market

Unified convergence analysis of numerical schemes for a miscible displacement problem

This article performs a unified convergence analysis of a variety of numerical methods for a model of the miscible displacement of one incompressible fluid by another through a porous medium. The unified analysis is enabled through the framework of the gradient discretisation method for diffusion operators on generic grids. We use it to establish a novel convergence result in $L^\infty(0,T; L^2(\Omega))$ of the approximate concentration using minimal regularity assumptions on the solution to the continuous problem. The convection term in the concentration equation is discretised using a centred scheme. We present a variety of numerical tests from the literature, as well as a novel analytical test case. The performance of two schemes are compared on these tests; both are poor in the case of variable viscosity, small diffusion and medium to small time steps. We show that upstreaming is not a good option to recover stable and accurate solutions, and we propose a correction to recover stable and accurate schemes for all time steps and all ranges of diffusion

Environment effects on effective magnetic exchange integrals and local spectroscopy of extended strongly correlated systems

The present work analyzes the importance of the different components of the environment effects on the local spectroscopy of extended strongly correlated systems. It has been found that the usual formal charge definition of the charge transfer and Madelung potential are far too crude for an accurate determination of the local excitation energies in embedded fragment calculations. A criterion for the validation of the embedding against the infinite system density of states has been proposed.Comment: 8 pages, 9 figure