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Dielectric loss spectroscopy (DLS) was performed at compact samples and lamellary organized Langmuir-Blodgett (LB) films from various fatty acid salts. Previous thermoanalytical measurements at compact samples revealed the appearance of two different phase transition temperatures; the lower one is related to the acid the second one to the acid salt molecules. In spite of ill defined electrical contacts with the film the characteristic DLS frequencies obtained from about 100nm thick multilayer films are similar to those recorded from bulk samples. No significant variations of frequencies were found changing the counter ions. Besides conductivity influence at low frequncies we found two relaxations related to the mobility of the dipolar carboxylat-metal group at about 100 and 10000Hz. One of these frequencies is related to the rotation around the chain axis. The strength of this relaxation increases significantly with increasing the sample temperature above 105°C. This temperature is connected with a structural phase transition observed by X-ray reflectometry. In case of Pb-stearate the results of the dielectric measurements help to interprete this structural change as a transition from an orthorhombic into a free-rotator phase. The uncorrelated rotation of molecules around their molecular axes initiates a much increased relaxation strength at the carboxylat-metal sites.
Elite und Elitenbildung II : zu den Prinzipien von Auslese und Gleichheit im deutschen Spitzensport
(2000)
Over the recent years, the French sports élite became one of the most important political representatives of the Grande Nation. The latest achievements were the triumphs in the Soccer World and European Championships, which not only became the symbol for France's abilities, but also the symbol for the ability of the French integration model. This paper discusses the social and political foundations, which ensure the development of the sports élite. I conclude that since the 60s the centralist state established a system of educating the sports élite analogously to the well-known traditional model of élite-recruitment.
Chemie : Stoffe, Reaktionen, Umwelt ; Ausgabe Mecklenburg-Vorpommern, Realschule, 10, Lehrbuch
(2000)
Umgang mit Texten/Lesen
(2000)
Since 1992 the southern shore of the Lake Gülpe in western Brandenburg is managed with Galloway cattle to preserve species, vegetation and landscape pattern. This paper presents the vegetation zones which are influenced by the water balance being the most significant and dynamic location factor in the area. Following the plots from dry to wet sites the most important plant communities are: Diantho-Armerietum, Arrhenatheretalia-Gesellschaft (-community), Leonotodon saxatilis -Potentilla anserina-community, Caricetum gracilis as well as Glycerietum aquaticae and Cypero- Samoletum. 23 endangered species were found.
Mit der Neuregelung leben
(2000)
Schreiben zwischen Hass, Selbstopfer und Fluch : zum "Todesarten"-Projekt von Ingeborg Bachmann
(2000)
Erziehung vom Kinde aus : Reformpädagogische Versuchsschulen nach 1900 und ihre heutige Bedeutung
(2000)
Introduction
(2000)
Entwicklung von Risikokindern im Schulalter : die langfristigen Folgen frühkindlicher Belastungen
(2000)
Lexikon der Veterinärmedizin
(2000)
Perhaps like no other country, Germany has radically changed its policies towards regulating air pollution in the European context. Acting originally as a dragger in the 1970s to regulate transboundary air pollutants due to pessimism about the relationship between causes and effects, Germany responded very decisively to its own damage assessment in the early 1980s. In particular the adverse effects to forests (Waldsterben" or forest decline) led to the formulation of strict air pollution regulations in the domestic context, efforts to spread the regulatory system within the European Union, and activities within the United Nations Economic Commission for Europe to foster stronger, continent-wide emission reductions. Using three conceptual models (rational actor, domestic politics, and social learning), we show that Germany deviated strongly from the ideal policy cycle consisting of (i) domestic policy formulation, (ii) international negotiations, as well as (iii) implementation and compliance with the provisions of international environmental agreements. Both national policy-making as well as partial implementation have been well on the way towards compliance even before Germany entered international negotiations on substantive protocols. Therefore, one may conclude from this country study that push countries may use the results of their national policy processes to influence the policy of other countries.
Political Science research encounters inferences across levels of analysis; however, they are fraught with challenges. After introducing voting examples of aggregation bias, problems posed by aggregation bias are summarized more generally. Subsequently, the article reviews the major methodological approaches to overcome aggregation bias and to solve the ecological inference (disaggregation) problem. The article highlights the possibility that aggregation bias may lead governments to accept (or reject) international climate agreements when negotiating as blocs of countries as compared to the distribution of the preferences of all countries involved in the negotiations.
Although past research has emphasized the importance of international regimes for international gover-nance, systematic assessments of regime effects are missing. This article derives a standardized measure-ment concept for the effectiveness of international environmental regimes. It is based on a simultaneous evaluation of actual policy against a no-regime counterfactual and a collective optimum. Subsequently, the empirical feasibility of the measurement concept is demonstrated by way of two international treaties regu-lating transboundary air pollution in Europe. The results demonstrate that the regimes indeed show positive effects;but fall substantially short of the collective optima.
Da, denn und weil : der Kampf der Konjunktionen ; zur Grammatikalisierung im kausalen Bereich
(2000)
Länderbericht Vietnam
(2000)
Ein Europa das Angst macht
(2000)