Refine
Year of publication
Document Type
- Article (30558)
- Part of Periodical (11896)
- Book (8260)
- Doctoral Thesis (5708)
- Part of a Book (3719)
- Working Paper (3386)
- Review (2878)
- Contribution to a Periodical (2369)
- Preprint (2070)
- Report (1544)
Language
- German (42440)
- English (29243)
- French (1067)
- Portuguese (723)
- Multiple languages (309)
- Croatian (302)
- Spanish (301)
- Italian (194)
- mis (174)
- Turkish (148)
Is part of the Bibliography
- no (75226) (remove)
Keywords
- Deutsch (1038)
- Literatur (809)
- taxonomy (760)
- Deutschland (543)
- Rezension (491)
- new species (449)
- Frankfurt <Main> / Universität (341)
- Rezeption (325)
- Geschichte (292)
- Linguistik (268)
Institute
- Medizin (7694)
- Präsidium (5190)
- Physik (4451)
- Wirtschaftswissenschaften (2698)
- Extern (2661)
- Gesellschaftswissenschaften (2373)
- Biowissenschaften (2184)
- Biochemie und Chemie (1974)
- Frankfurt Institute for Advanced Studies (FIAS) (1687)
- Center for Financial Studies (CFS) (1630)
Ob man auch Vers an Verse flicht,
Der Reime Blüten rastlos bricht,
Nur Abglanz ist's und Wiederhall,
Ob man es singt, ob man es spricht:
Doch aller Gedichte Vollendung ist - -
O glaube mir, - - ein getanztes Gedicht.
Dieser aus sechs vierhebigen, rhythmisch leicht holpernden Versen bestehende Text ist einer der wenigen Versuche Hugo von Hofmannsthals in der ursprünglich arabischen, besonders aber von persischen Dichtern entfalteten Form des Ghasels, und er ist sogar eines von drei Ghaselen, die Hofmannsthal zu seinen Lebzeiten selbst veröffentlicht hat, wenn auch bloß in dem als Privatdruck erschienenen Ballprogramm "Ein Tanz durch Wien" vom 21. Februar 1891.
Feedforward inhibition and synaptic scaling are important adaptive processes that control the total input a neuron can receive from its afferents. While often studied in isolation, the two have been reported to co-occur in various brain regions. The functional implications of their interactions remain unclear, however. Based on a probabilistic modeling approach, we show here that fast feedforward inhibition and synaptic scaling interact synergistically during unsupervised learning. In technical terms, we model the input to a neural circuit using a normalized mixture model with Poisson noise. We demonstrate analytically and numerically that, in the presence of lateral inhibition introducing competition between different neurons, Hebbian plasticity and synaptic scaling approximate the optimal maximum likelihood solutions for this model. Our results suggest that, beyond its conventional use as a mechanism to remove undesired pattern variations, input normalization can make typical neural interaction and learning rules optimal on the stimulus subspace defined through feedforward inhibition. Furthermore, learning within this subspace is more efficient in practice, as it helps avoid locally optimal solutions. Our results suggest a close connection between feedforward inhibition and synaptic scaling which may have important functional implications for general cortical processing.
Der Beitrag geht der Frage nach, wie sich die "doppelte Sprachbürgerschaft" des deutsch-tschechischen Autors Ota Filip in seinem Werk niederschlägt und untersucht am Beispiel seines Romans "Der siebente Lebenslauf" (2000, 2001), der in zwei Sprachfassungen vorliegt, zu welchen Verschiebungen es gekommen und wie diese die Rezeption in den beiden Ländern mitgeprägt haben. Dabei wird insbesondere auf das Konzept des "Memoirromans" (Kohout) und des "transnationalen Lebenslaufes" (Herren) näher eingegangen.
Quando se acompanha o discurso filosófico acerca da sensibilidade artística, salta aos olhos que nele impera uma dupla tendência no que se refere aos recursos expressivos. Por um lado, nota-se que os meios de expressão acabam resistindo uns em relação aos outros; por outro, percebe-se que tal resistência também se revela bastante fraca, descerrando novas fronteiras e ocasionando ulteriores transições. Tendo isso em vista, o propósito geral do presente artigo consiste em pôr à prova a hipótese de que é no âmbito da música que a moderna ponderação estética descobre o sentido e o alcance do vínculo entre as artes, forjado, em geral, nos termos da auto-compreensão das vanguardas artísticas. Trata-se, em suma, de refazer os passos por meio dos quais a música terminou por se converter, no século XIX, num dos mais importantes veículos de ideias para, a partir do ponto de inflexão representado pela filosofia nietzschiana da maturidade, trazer à plena luz a concepção de "emaranhamento" [Verfransung] das artes, a qual ganha relevo, em especial, na derradeira etapa do itinerário intelectual de Th. W. Adorno.
A concepção de filosofia formulada por Adorno foi impulsionada principalmente pela sua reação crítica a sistemas com pretensões totalitárias: nazismo, stalinismo e a sociedade produtora de mercadorias. A filosofia representa um refúgio para a liberdade diante dessas estruturas: ela dá voz ao não-idêntico. A capacidade de subverter os ordenamentos conceituais e sociais é implícita ao próprio pensamento, que se articula na forma de constelações em devir. A aproximação da dialética com o materialismo, concebido enquanto primazia do objeto, fortalece a filosofia na sua potencialidade crítica, na sua proximidade com a realidade e com a liberdade. Resulta daí uma filosofia renovada, simultaneamente aberta e comprometida com a verdade. A proposta deste artigo é apresentar a interdependência desses conceitos e apontar para a relevância da concepção de filosofia que deles emerge.
A Teoria Crítica propõe, com Theodor Adorno, uma íntima relação entre filosofia e desenvolvimento de experiências formativas, constituindo um referencial teórico indispensável para o entendimento acerca do que é pensar filosoficamente em uma perspectiva denominada negativa. Nessa relação, a experiência e racionalidade estética demarcam uma nova forma de conceber a razão e seu momento na relação com a objetividade. Esse momento da razão não indica apropriação, mas remete para uma aproximação e, a partir dessa, a construção de sentido. A problemática que orienta este texto indaga sobre como os conceitos de concreto, aproximação e construção se articulam no desenvolvimento das chamadas experiências formativas. Defendemos a hipótese de que a partir da articulação desses conceitos a riqueza constitutiva da realidade passa a ser manifestada e apreendida, possibilitando, mediante a ampliação das experiências, a manifestação do novo e a construção de sentido. Essa constelação conceitual indica o desafio de considerar a objetividade para além do imediatamente dado; indica, também, o sentido que deve assumir a tensão dialética geradora da aproximação e, por último, um caminho que nos auxilia na tarefa de compreensão do pensamento crítico de Theodor Adorno.
Die vorliegende, publikationsbasierte Dissertation, bestehend aus den drei Einzelpublikationen Bayer (2011, 2012) und Bayer und Schönhofer (2012), verfolgte das Ziel, die Spinnenfamilie Psechridae zu revidieren. Weiterhin sollten die phylogenetische Position dieser Familie im System der höheren Webspinnen (Araneomorphae) sowie die phylogenetischen Beziehungen der einzelnen Arten innerhalb der beiden Gattungen der Psechridae untersucht werden. In Form von morphologisch-taxonomischen Bearbeitungen wurden die beiden die Psechridae bildenden Gattungen Psechrus und Fecenia revidiert, wobei sämtliches Typus-Material sowie reichhaltiges, weiteres Material eingehend beschrieben, illustriert und diagnostiziert wurde. Hierbei wurden auch intraspezifische Variabilität sowie die Prä-Epigynen subadulter Weibchen, die in taxonomischen Arbeiten bislang nur eine unwesentliche Rolle gespielt haben, beschrieben, illustriert und taxonomisch ausgewertet. Zudem wurden im Rahmen dieser Untersuchungen bereits Überlegungen über mögliche Verwandtschaftsbeziehungen innerhalb der beiden Gattungen angestellt. ...
Die vorliegende Arbeit beschäftigt sich mit der Energiekalibration und der Effizienz zweier Niederenergie-Germaniumdetektoren, deren Energieauflösungen hier ebenfalls bestimmt werden. Die Untersuchungen werden an den γ-Spektren von 109Cd, 54Mn, 137Cs, 57Co, 133Ba, 60Co und 22Na in zwei verschiedenen Verstärkungseinstellungen vorgenommen, wobei der Abstand der Eichquellen zu dem Detektor variiert wird, um zussätzlich die Abhänngigkeit der Effizienz vom Raumwinkel sowie den Einfluss von Summeneffekten zu untersuchen. Einige der Eichquellen weisen in ihren Spektren γ-Zerfallskaskaden auf, die sich negativ auf die Bestimmung der Detektoreffizienz auswirken und somit als Eichquellen nicht optimal sind. Zusätzlich erfolgt dann ein Vergleich der Effizienzeichungen mit einer Monte-Carlo-Simulation.
The vegetation of the Mount Murchison and Wilga areas, Paroo Darling National Park (latitude 31o00’-32o 40’S and longitude 142o10’-144o25’E) in north western New South Wales was assessed using intensive quadrat sampling and mapped using extensive ground truthing and interpretation of aerial photograph and Landsat Thematic Mapper satellite images. In the survey 237 vascular plant species including 37 (15.6%) exotic species, from 46 families were recorded. Seventeen vegetation communities were identified and mapped, 15 for Mount Murchison area and 13 for the Wilga area. The most widespread for Mount Murchison being Maireana pyramidata low open shrubland, Flindersia maculosa low open woodland, Muehlenbeckia florulenta open shrubland and Eucalyptus coolabah / Eucalyptus largiflorens open woodland. The most widespread for Wilga being Muehlenbeckia florulenta open shrubland and Eucalyptus coolabah / Eucalyptus largiflorens open woodland. Many of these communities have been impacted by a history of 150 years of pastoral use.
The listed threatened plant taxa within the South Coast Region of New South Wales (Helensburgh to Batemans Bay, as designated by the NSW National Parks and Wildlife Service) are documented. Of the 100 NSW listed taxa, 69 are also listed by the Commonwealth, while two additional taxa are only listed by the Commonwealth. An analysis of the individual taxa and the 62 conservation reserves in the region, found that 30 taxa can with confidence be said to be adequately reserved, while 50 are assessed as inadequately reserved; for the remaining 22 taxa, reservation status is unknown. Examples of challenges for the conservation of threatened plants in the region are examined; these challenges have relevance well beyond the South Coast Region. Managing for individual plant species may be hampered by a lack of basic ecological information; this is particularly so for the rarer species such as orchids. One of the main areas where information is lacking is the response of most species to bushfire. Conservation on private land is becoming an increasingly important and challenging area for plant species conservation as the last large areas of public land are dedicated for one purpose or another. A more co-ordinated approach to conservation on private land may produce improved outcomes for many inadequately reserved taxa.
Species may become vulnerable because of a reduction of habitat, leading to reduction of population sizes and an increase in geographic isolation between populations, leading to genetic drift that may result in reduced reproductive fitness. The restricted sedge Gahnia insignis S.T. Blake (family Cyperaceae), occurring in isolated pockets in north-east New South Wales and Queensland, was compared to a closely related, sympatric, common and widespread Gahnia clarkei Benl for flowering phenology and reproductive success. Flowering patterns, examination of pollen, fertilisation and embryo development and seed-ovule ratios show Gahnia clarkei has every indication of successful sexual reproduction, but that Gahnia insignis appears to reproduce mostly by vegetative means, with an occasional sexual event. This was due to the rarity of pollination opportunities, and to poor pollen viability and pollen quantity, resulting in a much lower seed-ovule ratio than Gahnia clarkei. The additional high level of vegetative reproduction in Gahnia insignis suggests it may be largely clonal in Nightcap National Park. A genetic study of the whole distribution would add knowledge of the species genetic diversity and differentiation between populations.
Was mit der Reformation in die Krise gerät, ist nicht nur die kirchenpolitische Einheitsfiktion des unum corpus mysticum. In die Krise gerät ebenso das Evidenzparadigma einer politischen Theologie, die seit dem Investiturstreit untrennbar mit der sakramentalen Präsenz, der sakramentalen Verkörperung des corpus Christi verum verbunden war. Wenn im England James I., im Übergang von der feudalen Monarchie zum neuzeitlichen Absolutismus, die Figuren des Gottesgnadentums und der translatio imperii zu politischen Leitgedanken werden, dann artikuliert sich darin der vehemente Anspruch der Besetzung einer Position, auf deren weitgehendem Verzicht zwischen dem 12. und 16. Jahrhundert die wie auch immer prekäre Balance zwischen kirchlicher und weltlicher Gewalt beruht hatte. Die Aufkündigung der Konditionen dieses Kompromisses nicht nur auf der Ebene untergeordneter Territorialgewalten, sondern mit der Reklamation der Autonomie der anglikanischen Kirche erstmals auf dem Niveau einer europäischen Großmacht, begründete für nahezu ein Jahrhundert ein Szenario der politischen Apokalypse.
Free riders play fair
(2012)
After the demise of the social contract theory, the argument from fair play, which employs the principle of fair play, has been widely acknowledged as one of the most promising ways of justifying political obligation. First, I articulate the most promising version of the principle of fair play. Then, I show that free riders play fair, that is, that their moral fault lies not in unfairness but in the violation of a rule by appealing to the example of three-in-a-boat. Finally, I conclude that even the most promising version is false because those who have accepted benefits from a social cooperative scheme do not owe an obligation of fair play.
When judges are authorised to invalidate legal acts for being unconstitutional, the competence of the legislator is directly concerned. The question raises, if thus judges do not usurp legislative power. In the traditional doctrine of the separation of powers the parliament is the first power, based on its direct democratic legitimacy. Yet cancelling legal acts completely or partially does evoke more irritations in the public that could be expected. The people seem to have more confidence to the assumed impartiality of the judges than to the results of the parliamentary work which seems to be dominated by the struggles of the parties. The necessity of judicial review mainly is based on the consideration that individual rights even in an authentic democratic system may be violated by a legal act of the parliament. In this case constitutional courts have the very task to defend individual rights, principles of liberty and authentic equality. Therefore it is justified to speak of the “jurisdiction of liberty”, as the Italian constitutional expert Cappelletti has said. But also without such legitimacy in many countries the Courts intervene in the field of the legislator. The courts themselves discuss the limits of judicial interventions, emphasising themselves, that they have to respect the legislative decisions principally, but do not abide always by their own proclaimed principles. In Spanish recent publications it is spoken of the principle “in dubio pro legislatore”, (in case of doubt in favour the legislator), reminding of “in dubio pro reo”, in order to treat the legislative power not worse than the defendant in a criminal process..
Die exakte Positionierung von Intraokularlinsen in den Kapselsack ist von entscheidender Bedeutung für das postoperative visuelle Ergebnis nach Kataraktoperation oder refraktivem Linsenaustausch. Schon leichte Dezentrierungen können optische Aberrationen hervorrufen welche das Sehen der Patienten negativ beeinflussen. Besonders kommt dieses Phänomen bei sog. Premium Intraokularlinsen mit speziellen Optiken (asphärisch, torisch oder multifokal, sowie Kombinationen dieser) zum Tragen. Diese Optiken können Ihre gewünschte Wirkung nur bei exakter Positionierung entfalten. Eine postoperative Feinpositionierung ist nicht möglich, was die Ansprüche an den Operateur bei Implantation der Linsen erhöht. Minimalinvasive microinzisionelle Operationstechniken bieten heute gute Möglichkeiten, die Implantate exakt zu positionieren. Neben den Dezentrierungen können Intraokularlinsen auch dislozieren, beispielweise durch intra- oder postoperative Kapselrupturen, Linsenverziehungen oder auch Rotation der Implantate. Hier ist ein weiterer chirurgischer Eingriff von Nöten. Der Vortrag stellt dementsprechend verschiedene Videos und praktische Hinweise zur Handhabung postoperativer Linsendislokationen vor.