911 resultados para Degrees of freedom (mechanics)


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Over the past few decades substantial progress has been achieved in the democratisation and modernisation of the countries of Southeastern Europe. The formal democratic institutions were introduced, a liberalisation of trade resulted in the reintegration of the region into the global economy and some of them successfully applied to join the EU and NATO. But the transformation process is far from over. In the past years the achievements of the political and economic transformation have been rolled back and the quality of governance has declined in many countries. To avoid a further deterioration of the situation in the region the new impulse for institutional transformation and a change of the development model are needed. This report is the outcome of a discussion held during the conference “The Freedom Challenge in Southeastern Europe – Implications for Poland”. This joint event was developed by the Centre for Eastern Studies and Ideas Lab – the President’s Expert Programme at the Chancellery of the President of the Republic of Poland. The chapters of the report reflect the main three subjects debated during the conference. In the first chapter Spasimir Domaradzki assesses the rule of law and its influence on the consolidation of democracy in the region. In the second chapter Marta Szpala focuses on economic development in Southeastern Europe. The third chapter is written by Adam Balcer and analyses the key instruments Russia is using to build influence in this region.

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Breeding individuals enter an emergency life-history stage when their body reserves reach a minimum threshold. Consequently, they redirect current activity toward survival, leading to egg abandonment in birds. Corticosterone (CORT) is known to promote this stage. How and to what extent CORT triggers egg abandonment when breeding is associated with prolonged fasting, however, requires further investigation. We manipulated free-living male Adelie penguins with CORT-pellets before their laying period. We then examined their behavioral response with respect to nest abandonment in parallel with their prolactin levels (regulating parental care), and the subsequent effects of treatment on breeding success in relieved birds. Exogenous CORT triggered nest abandonment in 60% of the treated penguins -14 days after treatment and induced a concomitant decline in prolactin levels. Interestingly, prolactin levels in treated penguins that did not abandon their nest were higher at the point of implantation and also after being relieved by females, when compared with abandoning penguins. Among successful birds, the treatment did not affect the number of chicks, nor the brood mass. Our results show the involvement of CORT in the decision-making process regarding egg abandonment in Adelie penguins when incubation is associated with a natural long fast. However, we suggest that CORT alone is not sufficient to trigger nest abandonment but that 1) prolactin levels need to reach a low threshold value, and 2) a rise in proteolysis (i.e. utilization of protein as main energy substrate) seems also to be required.

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Drawn and compiled by F. Krause, C. E., Ann Arbor. Publication information: Chicago, Ill. : Everts & Stewart, 1874.

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On cover: Vice President Nelson A. Rockefeller speaks out on issues confronting Americans in Bicentennial 1976.

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National Highway Traffic Safety Administration, Washington, D.C.

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National Highway Traffic Safety Administration, Washington, D.C.

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National Highway Traffic Safety Administration, Washington, D.C.

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Bibliography: p. 120-123.

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