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We calculate leading-order dilepton yields from a quark-gluon plasma which has a time-dependent anisotropy in momentum space. Such anisotropies can arise during the earliest stages of quark-gluon plasma evolution due to the rapid longitudinal expansion of the created matter. A phenomenological model for the proper time dependence of the parton hard momentum scale, p_hard, and the plasma anisotropy parameter, xi, is proposed. The model describes the transition of the plasma from a 0+1 dimensional collisionally-broadened expansion at early times to a 0+1 dimensional ideal hydrodynamic expansion at late times. We find that high-energy dilepton production is enhanced by pre-equilibrium emission up to 50% at LHC energies, if one assumes an isotropization/thermalization time of 2 fm/c. Given sufficiently precise experimental data this enhancement could be used to determine the plasma isotropization time experimentally.
The paper aims at presenting research about Neo-Conservatism, in particular about the origin(s), history of development, ideas, and foreign policy goals. The core argument of the paper is that the discipline of International Relations (IR), in particular the North American Research and the Peace and Conflict Research, should take the Neoconservatives seriously. Three arguments can be made for this: First of all, Neoconservatives such as Robert Kagan, Charles Krauthammer, and Normen Podhoretz are participating in the debates about US foreign policy, and they introduce their ideas (e.g. "democracy promotion", "unipolar moment", and "benevolent empire") into the discourse. The foreign policy of the Reagan administration as well as the foreign policy of George W. Bush was highly influenced by neoconservative ideas. To sum up, Neo-Conservatism is the fourth influential school of US foreign policy beside Isolationism, Liberal Internationalism, and Realism. Secondly, Neoconservatives are proponents of a war-prone-US foreign policy, and advocates of the "war on terror" and the Iraq War. And finally, Neoconservatives are characterized by ideas, in particular the idea of democracy promotion, as the purpose of American politics and historic mission. Along with this, a neoconservative misunderstanding of IR theories becomes apparent. The "Democrat Realist" Krauthammer and the "Wilsonianist" Podhoretz both refer to "Realism", "Liberalism" and Wilson’s doctrine "to make the world safe for democracy" in a way which is not only misleading, but deceptive. Neoconservatives suggest that Realism is a sole power politics-theory without normative bias, and that the scholars of the liberal peace theory as well as Wilson and his successors claim for a policy of democracy promotion by using force and waging war. Against this background, a critical examination with Neoconservatism is presented in the paper. To reveal the neoconservative misunderstanding of IR discipline and its two important school of thoughts, the few similarities but numerous differences between Neo-Conservatism on the one hand and realist and liberal approaches in IR on the other hand are worked out.
Anschleichen an Übernahmeziele mittels Cash Settled Equity Derivaten : ein Regelungsvorschlag
(2009)
Noch ist das Risikobegrenzungsgesetz, das unter anderem neue Meldepflichten in das Wertpapierhandelsgesetz (WpHG) einführt, nicht vollständig in Kraft getreten. Gleichwohl wird bereits angesichts aktueller Entwicklungen auf dem internationalen und deutschen Übernahmemarkt in Artikeln der Fachpresse und im kapitalmarktrechtlichen Schrifttum die erneute Überarbeitung des wertpapierhandels- und wertpapierübernahmerechtlichen Meldesystems gefordert. Diese Forderung ist berechtigt. Denn im Risikobegrenzungsgesetz, dem zeitlich letzten Versuch des Gesetzgebers, die Transparenz des Wertpapierhandels zu erhöhen, konnte die Chance nicht genutzt werden, das wertpapierhandelsrechtliche Meldesystem an eine neuere Praxis auf den Finanzmärkten anzupassen.
Background Hepatitis C virus (HCV) is a leading cause of chronic liver disease, end-stage cirrhosis, and liver cancer, but little is known about the burden of disease caused by the virus. We summarised burden of disease data presently available for Europe, compared the data to current expert estimates, and identified areas in which better data are needed. Methods Literature and international health databases were systematically searched for HCV-specific burden of disease data, including incidence, prevalence, mortality, disability-adjusted life-years (DALYs), and liver transplantation. Data were collected for the WHO European region with emphasis on 22 countries. If HCV-specific data were unavailable, these were calculated via HCV-attributable fractions. Results HCV-specific burden of disease data for Europe are scarce. Incidence data provided by national surveillance are not fully comparable and need to be standardised. HCV prevalence data are often inconclusive. According to available data, an estimated 7.3–8.8 million people (1.1–1.3%) are infected in our 22 focus countries. HCV-specific mortality, DALY, and transplantation data are unavailable. Estimations via HCV-attributable fractions indicate that HCV caused more than 86000 deaths and 1.2 million DALYs in the WHO European region in 2002. Most of the DALYs (95%) were accumulated by patients in preventable disease stages. About one-quarter of the liver transplants performed in 25 European countries in 2004 were attributable to HCV. Conclusion Our results indicate that hepatitis C is a major health problem and highlight the importance of timely antiviral treatment. However, data on the burden of disease of hepatitis C in Europe are scarce, outdated or inconclusive, which indicates that hepatitis C is still a neglected disease in many countries. What is needed are public awareness, co-ordinated action plans, and better data. European physicians should be aware that many infections are still undetected, provide timely testing and antiviral treatment, and avoid iatrogenic transmission.
Bis vor wenigen Jahren war die Ribonukleinsäure, kurz RNA, ein Stiefkind der Forschung. Nicht zuletzt deshalb, weil man ihre Vielseitigkeit unterschätzte. Inzwischen weiß man, dass die RNA nicht nur die genetischen Baupläne vom Zellkern zu den Ribosomen überbringt, sondern auch wichtige katalytische und regulatorische Funktionen übernehmen kann. Dank zweier von der Aventis Foundation gestifteter Professuren für Chemische Biologie konnte die Goethe-Universität 2008 ihre Aktivitäten auf diesem Gebiet verstärken: Während Beatrix Süß die biochemischen Eigenschaften von RNA untersucht, konzentriert sich Jens Wöhnert auf die Aufklärung ihrer Struktur. ...