905 resultados para Swann’s way
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In his analysis of the basic compromise that is emerging between the new left-wing government of Greece and its European partners, Daniel Gros emphasises that the key element will be how the real problem, namely liquidity, is dealt with.
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From the Introduction. After 18 days of marathon talks over Iran’s nuclear programme, the E3 plus 3 (US, Russia, China, Britain, France, Germany) and Iran agreed on the final text of the Joint Comprehensive Plan of Action (JCPOA), opening a new chapter in relations between Iran and the West after a 12-year standoff.
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More than three years after al-Gaddafi was overthrown, Libya has still not returned to some semblance of normality. In many places, the Libyan state exists only on paper. No less than two governments and dozens of rival tribes, all with their own militias and armed to the teeth, are trying to come to power. In the midst of this chaos “IS,” the terrorist organization, has now entered the fray. Evidence of this is provided by the brutal murder of 21 Egyptian Copts, which could trigger off a civil war that will pose a threat to the entire region and to Europe. Mirco Keilberth, an expert on Libya, explains what is going on.
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Poland is making headline news again. This time, however, not in a role of Central European Wunderkind surfing the economic crisis, but for reasons to be less proud of. Ever since the Prawo and Sprawiedliwość (PiS, a member of European Conservatives and Reformists group in the European Parliament) government took power after the elections in November, Poland has experienced political turmoil and is now facing accusations that the rule of law is in danger. This constitutes a major challenge for the European Union and for its other member states, which are looking for ways to deal with a recalcitrant state that makes a rapid U-turn on democratic fundamentals and takes any criticism hysterically. This is not the first time that the organisation has had to deal with such a case, yet solutions have not yet been found. Hungary is a case in point. And now Polish leaders too seem convinced about the virtues of the concept of illiberal democracy. Which prescription should the EU use to buck the trend and what are the potential side-effects?
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For several years Georgia has been experiencing processes which may be interpreted as symptoms of a deepening, multidimensional social and political crisis. Reforms have lost momentum, stagnation has set in, and in some areas the situation has begun to revert to the pre-revolution status (including rising crime levels). The Georgian political system has found itself in a serious crisis, while society has become increasingly frustrated and apathetic, mainly because people’s standards of living have been stagnating. This political and social malaise has been breeding Euro-scepticism and disenchantment with the West. A country that had been firmly navigating westwards, Georgia has now started drifting and slipping into malaise. This risks reversing what the country has achieved so far in the internal dimension, increasing instability and triggering a crisis in the pro-Western vector of Tbilisi’s foreign policy. While that may not necessarily mean a turn towards Russia, in the present situation it has been easier for Moscow to pursue its own interests in the region. Should Tbilisi’s pro-Western course become reversed or permanently stagnant, that would entail grave consequences for the country itself and beyond. It would be a defeat for the West and would undermine the European aspirations of countries like Ukraine or Moldova.
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mrtab tabulates multiple responses which are held as a set of indicator variables or as a set of polytomous response variables.
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BACKGROUND Researchers evaluating angiomodulating compounds as a part of scientific projects or pre-clinical studies are often confronted with limitations of applied animal models. The rough and insufficient early-stage compound assessment without reliable quantification of the vascular response counts, at least partially, to the low transition rate to clinics. OBJECTIVE To establish an advanced, rapid and cost-effective angiogenesis assay for the precise and sensitive assessment of angiomodulating compounds using zebrafish caudal fin regeneration. It should provide information regarding the angiogenic mechanisms involved and should include qualitative and quantitative data of drug effects in a non-biased and time-efficient way. APPROACH & RESULTS Basic vascular parameters (total regenerated area, vascular projection area, contour length, vessel area density) were extracted from in vivo fluorescence microscopy images using a stereological approach. Skeletonization of the vasculature by our custom-made software Skelios provided additional parameters including "graph energy" and "distance to farthest node". The latter gave important insights into the complexity, connectivity and maturation status of the regenerating vascular network. The employment of a reference point (vascular parameters prior amputation) is unique for the model and crucial for a proper assessment. Additionally, the assay provides exceptional possibilities for correlative microscopy by combining in vivo-imaging and morphological investigation of the area of interest. The 3-way correlative microscopy links the dynamic changes in vivo with their structural substrate at the subcellular level. CONCLUSIONS The improved zebrafish fin regeneration model with advanced quantitative analysis and optional 3-way correlative morphology is a promising in vivo angiogenesis assay, well-suitable for basic research and preclinical investigations.
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Energy harvesting devices are widely discussed as an alternative power source for todays active implantable medical devices. Repeated battery replacement procedures can be avoided by extending the implants life span, which is the goal of energy harvesting concepts. This reduces the risk of complications for the patient and may even reduce device size. The continuous and powerful contractions of a human heart ideally qualify as a battery substitute. In particular, devices in close proximity to the heart such as pacemakers, defibrillators or bio signal (ECG) recorders would benefit from this alternative energy source. The clockwork of an automatic wristwatch was used to transform the hearts kinetic energy into electrical energy. In order to qualify as a continuous energy supply for the consuming device, the mechanism needs to demonstrate its harvesting capability under various conditions. Several in-vivo recorded heart motions were used as input of a mathematical model to optimize the clockworks original conversion efficiency with respect to myocardial contractions. The resulting design was implemented and tested during in-vitro and in-vivo experiments, which demonstrated the superior sensitivity of the new design for all tested heart motions.
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F also available in microfiche.
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Mode of access: Internet.
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Federal Highway Administration, Washington, D.C.
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Federal Highway Administration, Washington, D.C.
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Federal Highway Administration, Office of Research, Development and Technology, Washington, D.C.
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Federal Highway Administration, Office of Research, Development and Technology, Washington, D.C.