Stable isotopes and element concentrations of samples from the Wadi Bih, United Arab Emirates

Ocean acidification triggered by Siberian Trap volcanism was a possible kill mechanism for the Permo-Triassic Boundary mass extinction, but direct evidence for an acidification event is lacking. We present a high-resolution seawater pH record across this interval, using boron isotope data combined with a quantitative modeling approach. In the latest Permian, increased ocean alkalinity primed the Earth system with a low level of atmospheric CO2 and a high ocean buffering capacity. The first phase of extinction was coincident with a slow injection of carbon into the atmosphere, and ocean pH remained stable. During the second extinction pulse, however, a rapid and large injection of carbon caused an abrupt acidification event that drove the preferential loss of heavily calcified marine biota.

Trajectories and outcomes of the 'Arab Spring' : comparing Tunisia, Egypt, Libya and Syria

Almost three years have passed since the 'Arab Spring' began in late 2010. In the major sites of popular uprisings, political conditions remain unsettled or violent. Despite similarities in their original opposition to authoritarian rule, the outcomes differed from country to country. In Tunisia and Egypt, processes of transiting from authoritarian rule produced contrasting consequences for democratic politics. Uprisings led to armed rebellion in Libya and Syria, but whereas Gaddafi was overthrown, Asad was not. What explains the different trajectories and outcomes of the Arab Spring? How were these shaped by the power structure and levels of social control of the pre-uprising regimes and their state institutions, on the one hand, and by the character of the societies and oppositional forces that rose against them? Comparing Tunisia with Egypt, and Libya with Syria, this paper discusses various factors that account for variations in the trajectories and outcomes of the Arab Spring, namely, the legacy of the previous regime, institutional and constitutional choices during "transition" from authoritarian rule, socioeconomic conditions, and the presence of absence of ethnic, sectarian and geographic diversity.

Japan and the Middle East after the Arab Spring

本稿は、中東における問題や紛争に対する日本の政策を考察し、中長期的な視野に立った日本の国益追求のためにはどのような選択肢が考えられるかを論じる。そのために、イランの核開発問題とシリアの市民戦争をケースとしてとりあげる。戦後の日本は中東での問題や紛争に対して、地域内諸国およびアメリカとの関係を同時に維持するために、双方の均衡を図る政策を打ち出してきたが、冷戦後には米国寄りの傾向が多く見られた。現在中東では、アラブの春の展望は不透明な部分が多い。日本は中東との関係において、問題や紛争の性質によっては負の遺産を抱える欧米とは一線を画した独自の政策とアプローチを打ち出すことが、中東資源国との関係の強化と拡大や中東市場の発展と安定には望ましいと考える。また同時に、今後の米国の中東における国益の変化が考えられることも要因ととらえ、本稿は冷戦期にみられたような、より均衡のとれた立場を打ち出し、より広い概念をもとに基づいた効果的なソフトパワーの行使を提唱する。

Authoritarianism and labor market : preference of labor policies in the Arab Gulf countries

Migrant and labor issues are a primary concern in the Arab Gulf countries. With focus on the economic and political conditions that influence actors' decisions when framing labor policies, this study analyzes how preferences of such policies are formed and explains why the governments of the Arab Gulf countries attempt to implement less economical policies. The findings suggest that governments avoid concessions for enterprises required to implement more economical policies and chose uneconomical ones to maintain authoritarian regimes.

Boards of directors and bank performance in United Arab Emirates

This study presents an empirical analysis about corporate governance of financial institutions in United Arab Emirates (UAE). The purpose of this research is to analyze the influence of the structure of board of directors on the performance of these institutions. To examine the effect of control exerted by particular families on bank management, we estimated models where the dependent variable is return on assets (ROA) and return on equity (ROE), independent variables are board of directors variables, and control variables are bank management variables. Our results show that the control of corporate governance by a ruler's family within a board of directors has a positive effect on bank profitability. Our results indicate that control by a ruler's family through a bank's board of directors compensates for the inadequacy of UAE's corporate governance system.

An overview of the ciao multiparadigm language and program development environment and its design philosophy

We describe some of the novel aspects and motivations behind the design and implementation of the Ciao multiparadigm programming system. An important aspect of Ciao is that it provides the programmer with a large number of useful features from different programming paradigms and styles, and that the use of each of these features can be turned on and off at will for each program module. Thus, a given module may be using e.g. higher order functions and constraints, while another module may be using objects, predicates, and concurrency. Furthermore, the language is designed to be extensible in a simple and modular way. Another important aspect of Ciao is its programming environment, which provides a powerful preprocessor (with an associated assertion language) capable of statically finding non-trivial bugs, verifying that programs comply with specifications, and performing many types of program optimizations. Such optimizations produce code that is highly competitive with other dynamic languages or, when the highest levéis of optimization are used, even that of static languages, all while retaining the interactive development environment of a dynamic language. The environment also includes a powerful auto-documenter. The paper provides an informal overview of the language and program development environment. It aims at illustrating the design philosophy rather than at being exhaustive, which would be impossible in the format of a paper, pointing instead to the existing literature on the system.

An overview of ciao and its design philosophy

We provide an overall description of the Ciao multiparadigm programming system emphasizing some of the novel aspects and motivations behind its design and implementation. An important aspect of Ciao is that, in addition to supporting logic programming (and, in particular, Prolog), it provides the programmer with a large number of useful features from different programming paradigms and styles and that the use of each of these features (including those of Prolog) can be turned on and off at will for each program module. Thus, a given module may be using, e.g., higher order functions and constraints, while another module may be using assignment, predicates, Prolog meta-programming, and concurrency. Furthermore, the language is designed to be extensible in a simple and modular way. Another important aspect of Ciao is its programming environment, which provides a powerful preprocessor (with an associated assertion language) capable of statically finding non-trivial bugs, verifying that programs comply with specifications, and performing many types of optimizations (including automatic parallelization). Such optimizations produce code that is highly competitive with other dynamic languages or, with the (experimental) optimizing compiler, even that of static languages, all while retaining the flexibility and interactive development of a dynamic language. This compilation architecture supports modularity and separate compilation throughout. The environment also includes a powerful autodocumenter and a unit testing framework, both closely integrated with the assertion system. The paper provides an informal overview of the language and program development environment. It aims at illustrating the design philosophy rather than at being exhaustive, which would be impossible in a single journal paper, pointing instead to previous Ciao literature.