837 resultados para Polymerization mechanism
Resumo:
Le silence est une composante fondamentale de la création artistique, aussi bien dans le domaine musical qu’au cinéma. La notion de silence atteint toutefois un espace limite dans le domaine littéraire, comme le note Gilles Deleuze en évoquant le « silence dans les mots », la « limite asyntaxique » qui n’est pas « extérieure au langage » dans la poésie d’Antonin Artaud ; cette même notion devenant plus problématique encore dans le domaine de l’autobiographie, traditionnellement informative. Nous posons tout d’abord la question de savoir comment l’auteur, se racontant lui-même, sa vie, son parcours, peut choisir de ne donner à lire qu’un silence plus ou moins long, et sembler ainsi renoncer à sa tâche, pour ensuite étudier le poème « Agrippa—A Book of the Dead » (1992) de l’écrivain américain William Gibson (né en 1948). Inspiré par la découverte d’un album de photos appartenant à son père, l’auteur y évoque les souvenirs de son enfance en Virginie. La singularité d’« Agrippa » réside surtout dans les mécanismes mis en oeuvre lors de sa lecture : à l’origine seulement disponible sur disquette, un programme d’ « encryption » ou « bombe logique » efface le texte au fur et à mesure que l’ordinateur le déchiffre, afin de n’être lu qu’une fois seulement, laissant la place au vide, au silence. Nous proposons ici d’étudier le poème « Agrippa » en démontrant comment la disparition progressive du texte a, dans le travail d’écriture de Gibson, une portée originale. L’objectif de l’étude est de montrer que Gibson se sert du poème pour proposer une révolution littéraire où l’art « quitte le cadre », où « le mot écrit quitte la page » de façon concrète et effective pour soumettre au lecteur un questionnement, esthétique, philosophique, voire théologique fécond – Maurice Blanchot arguant que Dieu communique « seulement par son silence ».
Resumo:
Problems in the banking system are at the core of the current crisis. The establishment of a banking union is a necessary (though not sufficient) condition for eventual crisis resolution that respects the integrity of the euro. The European Commission’s proposal for the establishment of a Single Supervisory Mechanism and related reform of the European Banking Authority (EBA) do not and cannot create a fully-fledged banking union, but represent a broadly adequate step on the basis of the leaders’ declaration of 29 June 2012 and of the decision to use Article 127(6) of the treaty as legal basis. The proposal rightly endows the European Central Bank (ECB) with broad authority over banks within the supervisory mechanism’s geographical perimeter; however, the status of non-euro area member states willing to participate in this mechanism, and the governance and decision-making processes of the ECB in this respect, call for further elaboration. Further adjustments are also desirable in the proposed reform of the EBA, even though they must probably retain a stopgap character pending the more substantial review planned in 2014.
Resumo:
The clean development mechanism (CDM) has been through a long and complex growing process since it was approved as part of the Kyoto Protocol. It was designed within the framework of the UNFCCC and the Kyoto Protocol, and reflected the political and economic realities of that time. To ensure its continued effectiveness in contributing to future global climate action and to reflect on how best to position the CDM to respond to future challenges, a high-level panel (HLP) was formed at the Durban climate change conference in 2011. Following extensive consultations, the panel published its report in September 2012. Through this Special Report, the CEPS Carbon Market Forum offers its reflections on findings and recommendations of the HLP, as well as, by extension, its own views on the future of the CDM. In the context of the latter, it explores the following questions: Is there a need for an instrument such as the CDM in the future? What ‘demand’ can it fill? In the roles identified under the first question, what can be done to adapt it and also continue to increase its efficacy?
Resumo:
We developed a family of polymer-drug conjugates carrying the combination of the anticancer agent epirubicin (EPI) and nitric oxide (NO). EPI-PEG-(NO)8, carrying the highest content of NO, displayed greater activity in Caco-2 cells while it decreased toxicity against endothelium cells and cardiomyocytes with respect to free EPI. FACS and confocal microscopy confirmed conjugates internalization. Light scattering showed formation of micelle whose size correlated with internalization rate. EPI-PEG-(NO)8 showed increased bioavailability in mice compared to free EPI.
Resumo:
The Bonin high is a subtropical anticyclone that is predominant near Japan in the summer. This anticyclone is associated with an equivalent-barotropic structure, often extending throughout the entire troposphere. Although the equivalent-barotropic structure of the Bonin high has been known for years among synopticians because of its importance to the summer climate in east Asia, there are few dynamical explanations for such a structure. The present paper attempts to provide a formation mechanism for the deep ridge near Japan. We propose a new hypothesis that this equivalent-barotropic ridge near Japan is formed as a result of the propagation of stationary Rossby waves along the Asian jet in the upper troposphere (‘the Silk Road pattern’). First, the monthly mean climatology is examined in order to demonstrate this hypothesis. It is shown that the enhanced Asian jet in August is favourable for the propagation of stationary Rossby waves and that the regions of descent over the eastern Mediterranean Sea and the Aral Sea act as two major wave sources. Second, a primitive-equation model is used to simulate the climatology of August. The model successfully simulates the Bonin high with an equivalent-barotropic structure. The upper-tropospheric ridge is found to be enhanced by a height anomaly of more than 80 m at 200 hPa, when a wave packet arrives. Sensitivity experiments are conducted to show that the removal of the diabatic cooling over the Asian jet suppresses the Silk Road pattern and formation of an equivalent-barotropic ridge near Japan, while the removal of the diabatic heating in the western Pacific does not. Copyright © 2003 Royal Meteorological Society