918 resultados para The Burnet Institute
Resumo:
The electronic gap structure of the organic molecule N,N′-diphenyl-N,N′-bis(3-methylphenyl)-(1,1′-biphenyl)-4,4′-diamine, also known as TPD, has been studied by means of a Scanning Tunneling Microscope (STM) and by Photoluminescence (PL) analysis. Hundreds of current-voltage characteristics measured at different spots of the sample show the typical behavior of a semiconductor. The analysis of the curves allows to construct a gap distribution histogram which reassembles the PL spectrum of this compound. This analysis demonstrates that STM can give relevant information, not only related to the expected value of a semiconductor gap but also on its distribution which affects its physical properties such as its PL.
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Context. Young massive clusters are key to map the Milky Way’s structure, and near-infrared large area sky surveys have contributed strongly to the discovery of new obscured massive stellar clusters. Aims. We present the third article in a series of papers focused on young and massive clusters discovered in the VVV survey. This article is dedicated to the physical characterization of VVV CL086, using part of its OB-stellar population. Methods. We physically characterized the cluster using JHKS near-infrared photometry from ESO public survey VVV images, using the VVV-SkZ pipeline, and near-infrared K-band spectroscopy, following the methodology presented in the first article of the series. Results. Individual distances for two observed stars indicate that the cluster is located at the far edge of the Galactic bar. These stars, which are probable cluster members from the statistically field-star decontaminated CMD, have spectral types between O9 and B0 V. According to our analysis, this young cluster (1.0 Myr < age < 5.0 Myr) is located at a distance of 11+5-6 kpc, and we estimate a lower limit for the cluster total mass of (2.8+1.6-1.4) · 103 M⊙. It is likely that the cluster contains even earlier and more massive stars.
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This study aimed to identify factors associated with the likelihood of IPV cessation among women attending Spanish primary healthcare. Of the 2465 women who reported lifetime IPV, 36.1 % stated that violence had ceased. Those women not currently abused had higher levels of education and social support, were workers or students, and had no dependent children. When IPV duration was less than 5 years, the likelihood of cessation was two times higher than when IPV continued beyond 5 years. For women who have experienced physical IPV, the probability of ending the violent relationship was 10 times higher than for those suffering from psychological IPV. The implications of the findings regarding clinical significance and future research are discussed.
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A large fraction of Gamma-ray bursts (GRBs) displays an X-ray plateau phase within <105 s from the prompt emission, proposed to be powered by the spin-down energy of a rapidly spinning newly born magnetar. In this work we use the properties of the Galactic neutron star population to constrain the GRB-magnetar scenario. We re-analyze the X-ray plateaus of all Swift GRBs with known redshift, between 2005 January and 2014 August. From the derived initial magnetic field distribution for the possible magnetars left behind by the GRBs, we study the evolution and properties of a simulated GRB-magnetar population using numerical simulations of magnetic field evolution, coupled with Monte Carlo simulations of Pulsar Population Synthesis in our Galaxy. We find that if the GRB X-ray plateaus are powered by the rotational energy of a newly formed magnetar, the current observational properties of the Galactic magnetar population are not compatible with being formed within the GRB scenario (regardless of the GRB type or rate at z = 0). Direct consequences would be that we should allow the existence of magnetars and "super-magnetars" having different progenitors, and that Type Ib/c SNe related to Long GRBs form systematically neutron stars with higher initial magnetic fields. We put an upper limit of ≤16 "super-magnetars" formed by a GRB in our Galaxy in the past Myr (at 99% c.l.). This limit is somewhat smaller than what is roughly expected from Long GRB rates, although the very large uncertainties do not allow us to draw strong conclusion in this respect.
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On 23 January 2014, a group of 73 member states’ officials and representatives from the European institutions and academia gathered at Clingendael Park in The Hague for a day-long seminar co-organised by the Netherlands Institute of International Relations and CEPS for the Ministry of Foreign Affairs of the Netherlands. The seminar’s aim was to discuss whether subsidiarity can offer a way forward that reconciles the need for better EU governance with concerns about legitimacy. This paper is based on subsidiarity literature, on preparatory talks with officials from member states and EU institutions and on the discussions in the seminar in The Hague. In particular, the paper explores the political and practical relevance of some of the ideas currently being considered to solidify the principle of subsidiarity in day-to-day decision-making. It maps the current political contours of subsidiarity as they appear in speeches and policy papers and presents some of the main ideas in the current debate on deepening subsidiarity.
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On June 17, 2011, the Center for Transatlantic Relations – together with the Center for European Policy Analysis, the Polish Institute of International Affairs in Warsaw, and the Embassies of Hungary and Poland – hosted authors writing on the theme “A Strong Europe in a Globalized World,” and who offered in-depth, substantive reflections about how the United States and Europe can work together more closely in meeting global challenges. Drawing on the agendas of the outgoing and incoming EU Presidencies of the Council of the European Union – Hungary and Poland respectively – authors focused on the importance of a strong US-EU partnership in the face of mounting global challenges, from the current financial and economic crisis through the insecurities of energy markets and the promise of the Arab Spring. Authors explored in depth four key areas of shared interests: A Global Perspective (Transatlantic Partnership in a Globalized World); Achievements and Deliverables of Eastern Partnership; Euro-Atlantic Perspectives for the Balkans; and Common Challenges of Energy Security. Senior Hungarian and Polish government officials, subject matter experts, private sector actors, and think tank scholars participated.
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Summary. The crisis in Mali has brought the Sahel to the centre of international attention. This fragile region not only suffers from longstanding development challenges, but also from an acute security vacuum that has triggered military intervention. Many questions have arisen as a consequence of the crisis. Has the European Union the ability to cope with such a complex and dynamically evolving security environment? How have divergent views on the political roadmap to be adopted, and the lack of resources at the African level, impacted the crisis response? Can the different players involved agree on what are the most pertinent needs and challenges to be addressed? Are they ready for long-term engagement? Can regional organisations effectively collaborate and are they able to successfully integrate different agendas? Following a conference organised by the Institute for European Studies, the Egmont Institute and the Observatoire de l’Afrique on these questions this Policy Brief builds on the findings of the conference and provides an analytical overview of the regional crisis by focusing on the main challenges facing the Sahel, the local and regional dynamics at play and the military and security response.
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In the City, the citizen is king. At least theoretically. In the European City currently being built around twenty eight national democracies, the citizen will soon be called upon, in May, to democratically elect his or her representative in the European Parliament for the next five years. Since the very first election of Members of the European Parliament by direct universal suffrage in 1979, spectacular progress has been made by the “European Economic Community” that we now all know as the European Union. And the powers vested in citizen representatives are equally impressive. But there is a real possibility that European citizens will turn their backs on the upcoming European elections like never before. Why?
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From the Introduction. In order to address the different challenges and opportunities on energy cooperation in the Eastern Mediterranean Region and Levant Basin, EGMONT – The Royal Institute for International Relations of Belgium – together with the Atlantic Council, and supported by H. E. Belgian Minister for Foreign Affairs Didier Reynders, opened an expert dialogue in 2013 in order to look at how the management of the new energy resources could act as a vector of cooperation instead of conflict between the concerned countries. The activities have targeted finding new possibilities for cooperation on political and security challenges, energy infrastructure development, the regulatory and legal framework, environmental concerns, and bilateral and regional structures, in a manner that enhances stability and security in the region, increases European energy security, contributes to rather than hinders a comprehensive Cyprus settlement, and promotes wider regional cooperation.
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A year ago, the Parliament of Ukraine adopted four bills on the policy of national memory: on granting access to the archives of the repressive organs of the Communist totalitarian regime in the years 1917–1991, on the legal status and commemoration of Ukrainian independence fighters in the twentieth century, on the immortalisation of the victory over Nazism in the Second World War, 1939–1945, and on the condemnation of the Communist and National Socialist (Nazi) totalitarian regimes and the forbidding of their symbolism from being promoted. The laws came into force on 21 May 2015. After a year, it can be stated that only the latter two are being observed – the official narrative regarding World War II has been changed, mainly due to the activity of the Ukrainian Institute of National Remembrance (UINR), but also as a result of public statements by President Petro Poroshenko. The process of removing from public places the names and commemorations referring to the Soviet era is underway, and the fears that this may trigger serious conflicts have not proved true. From roughly a thousand placenames subject to de-communisation some two thirds have been changed so far (parliamentary bills regarding the remaining ones are awaiting approval) and most statues of Communist leaders have been removed. However, the law concerning independence fighters, which raised the most serious controversies, did not have any practical consequences. Moreover, nothing suggests that this could change. The implementation of the de-communisation laws is associated with a significant change in Ukrainian patriotic narrative: it is no longer focused on national martyrdom and it is beginning to emphasize heroic motives, which is in line with wartime needs. The fact that some of these motives are likely to trigger problems in Ukraine’s relations with Poland seems to be viewed as a marginal ‘by-product’.
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This briefing is an input to the discussions that will take place in the session “Privacy under mass surveillance: a multi-stakeholder international challenge” to be held on November 9th in João Pessoa, Brazil, during the “Day Zero” of the Internet Governance Forum. This document is one of the outputs of the first phase of the project “Privacy in the digital age: fostering the implementation of the bilateral German-Brazilian strategy in response to massive data collection”, jointly developed by the Center for Technology and Society of the Rio de Janeiro Law School of the Getulio Vargas Foundation and the German Institute for International and Security Affairs (SWP), with the support of FGV. The project Privacy in the Digital Age seeks to identify legal, political, technical, and economic incentives for the implementation of resolution 168/67 on Privacy in the Digital Age, proposed by Germany and Brazil, and approved by the United Nations General Assembly and to identify other potential areas of collaboration between Germany and Brazil in the field of Internet Governance.
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The monograph summarizes geological and metallogenic data on the Mid-Atlantic Ridge obtained during research expeditions of the Geological Institute RAS in 2000-2003. Formation of the earth crust in the region, structure of the rift zone, structure of the newly discovered Bogdanov Fracture Zone, neotectonic deformations, metallogenic peculiarities, prospecting criteria of ocean ore mineralization are under consideration.
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The Baltic Sea is a seasonally ice-covered, marginal sea in central northern Europe. It is an essential waterway connecting highly industrialised countries. Because ship traffic is intermittently hindered by sea ice, the local weather services have been monitoring sea ice conditions for decades. In the present study we revisit a historical monitoring data set, covering the winters 1960/1961 to 1978/1979. This data set, dubbed Data Bank for Baltic Sea Ice and Sea Surface Temperatures (BASIS) ice, is based on hand-drawn maps that were collected and then digitised in 1981 in a joint project of the Finnish Institute of Marine Research (today the Finnish Meteorological Institute (FMI)) and the Swedish Meteorological and Hydrological Institute (SMHI). BASIS ice was designed for storage on punch cards and all ice information is encoded by five digits. This makes the data hard to access. Here we present a post-processed product based on the original five-digit code. Specifically, we convert to standard ice quantities (including information on ice types), which we distribute in the current and free Network Common Data Format (NetCDF). Our post-processed data set will help to assess numerical ice models and provide easy-to-access unique historical reference material for sea ice in the Baltic Sea. In addition we provide statistics showcasing the data quality. The website http://www.baltic-ocean.org hosts the post-processed data and the conversion code.
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Genetic sediment types have been identified based on a study of Core PS1599 collected from the eastern continental slope of the Weddell Sea. XRF analysis of 48 samples from this core carried out at the Vernadsky Institute of Geochemistry and Analytical Chemistry (Moscow) yielded the first comprehensive geochemical characteristics of all genetic types. Methods of correlation and factor analyses were used to outline geochemical associations of sediments and examine causes of their formation including the role of grain size composition. The results obtained have revealed fundamental differences between sources, mechanisms, and methods of transportation of sedimentary material for Holocene sediments, on the one hand, and Weichselian sediments, on the other hand.
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Baltic sediments have been studied by Behrens, Munthe, Küppers, Spethmann, Apstein, Sjöstedt, Pratje and the writer. The following types of sediments have been observed: varved and non-varved late-glacial clays, gray and black, post-glacial muds, and sands. The organic content of late-glacial clays ordinarily is less than 1.3 per cent, and of post-glacial muds more than 3 per cent. Sediments containing intermediate quantities are scarce. This can be explained as a result of the changed balance between organic and inorganic sedimentation when the glacial period ended; the abundance of fresh detritus then suddenly ceased and inorganic sedimentation became very much slower than before; consequently, the relative amount of organic detritus increased. As most of the material was not subjected to biological analysis, it has not been possible to distinguish different ages among post-glacial sediments.