725 research outputs found
Red list and checklist of the molluscs
Von den in Berlin nachgewiesenen 158 Molluskenarten und Unterarten wurden 38,6 % als bestandsgefĂ€hrdet eingestuft. Der Anteil gefĂ€hrdeter Taxa ist bei den Muscheln mit 43,3 % am höchsten, gefolgt von 39,8 % bei den Landschnecken und 33,3 % bei den Wasserschnecken. Im Vergleich zur Roten Liste 2005 sank der Anteil bedrohter Taxa um 10,4 %. WĂ€hrend der Anteil der bedrohten Landschnecken lediglich um 4,1 % gesunken ist, ist er bei den Wasserschnecken um 17,8 % und bei den Muscheln sogar um 18,2 % gefallen. Die Ursachen hierfĂŒr liegen einerseits in der verbesserten Datenlage, vor allem bei den Wassermollusken, und andererseits in der verĂ€nderten Auswertungsmethodik nach Ludwig et al. (2009). Bewertend lĂ€sst sich feststellen, dass sich die BiotopqualitĂ€t in den letzten 10 Jahren in Berlin verschlechtert hat und zum RĂŒckgang einiger anspruchsvoller Arten fĂŒhrte. Hinzu kommt, dass infolge zunehmender Ausbreitung von Neozoen eine rĂŒcklĂ€ufige Bestandssituation einiger einheimischer Arten durch VerdrĂ€ngung und Hybridisierung zu beobachten ist.58 mollusc species and subspecies are found in Berlin, 38.6 % of these were classified as threatened. The highest percentage of threatened taxa is found in the bivalve molluscs with 43.3 %, followed by 39.8 % in land snails and 33.3 % in water snails. Overall, the percentage of threatened taxa decreased by 10.4 % compared to the Red List of 2005. While the amount of threatened land snails decreased by only 4.1 %, it has dropped in water snails by 17.8 % and in mussels by 18.2 %. These changes are partly due to the improved data basis, especially in aquatic molluscs, and partly to the modified evaluation procedure developed by Ludwig et al. (2009). It has to be stated that the habitat quality has degraded during the last 10 years. This led to the decline of some sensible species in Berlin. Additionally, a declining population status of some native species by displacement and hybridization due to the rapid spread of invasive species can be observed
Remarks on ergodicity and invariant occupation measure in branching diffusions with immigration
Analytical and Numerical Treatment of the Mott--Hubbard Insulator in Infinite Dimensions
We calculate the density of states in the half-filled Hubbard model on a
Bethe lattice with infinite connectivity. Based on our analytical results to
second order in , we propose a new `Fixed-Energy Exact Diagonalization'
scheme for the numerical study of the Dynamical Mean-Field Theory. Corroborated
by results from the Random Dispersion Approximation, we find that the gap opens
at . Moreover, the density of states near the gap
increases algebraically as a function of frequency with an exponent
in the insulating phase. We critically examine other analytical
and numerical approaches and specify their merits and limitations when applied
to the Mott--Hubbard insulator.Comment: 22 pages, 16 figures; minor changes (one reference added, included
comparison with Falicov-Kimball model
The effects of clinical hypnosis versus Neurolinguistic Programming (NLP) before External Cephalic Version (ECV) : a prospective off-centre randomised, double-blind, controlled trial
Objective. To examine the effects of clinical hypnosis versus NLP intervention on the success rate of ECV procedures in comparison to a control group.
Methods. A prospective off-centre randomised trial of a clinical hypnosis intervention against NLP of women with a singleton breech fetus at or after 370/7 (259 days) weeks of gestation and normal amniotic fluid index. All 80 participants heard a 20-minute recorded intervention via head phones. Main outcome assessed was success rate of ECV. The intervention groups were compared with a control group with standard medical care alone (n=122).
Results. A total of 42 women, who received a hypnosis intervention prior to ECV, had a 40.5% (n=17), successful ECV, whereas 38 women, who received NLP, had a 44.7% (n=17) successful ECV (P > 0.05). The control group had similar patient characteristics compared to the intervention groups (P > 0.05). In the control group (n = 122) 27.3% (n = 33) had a statistically significant lower successful ECV procedure than NLP (P = 0.05) and hypnosis and NLP (P = 0.03).
Conclusions. These findings suggest that prior clinical hypnosis and NLP have similar success rates of ECV procedures and are both superior to standard medical care alone
Der Beitrag von Senior Coachs zur GrĂŒndung, Entwicklung und Weitergabe von Unternehmen
Gemeinwohlorientiertes Handeln (Corporate Citizenship) ist nicht allein ein Anliegen aktiver Unternehmerinnen und Unternehmer. Auch viele ehemalige Unternehmer und FĂŒhrungskrĂ€fte betĂ€tigen sich weiterhin ehrenamtlich. Eine Variante ehrenamtlicher TĂ€tigkeit wurde in dieser Studie nĂ€her analysiert, und zwar der Einsatz ehemaliger Unternehmer/FĂŒhrungskrĂ€fte als sogenannte Senior Coachs, die ihr Wissen und ihre Erfahrungen honorarfrei an aktive Unternehmer und ExistenzgrĂŒnder weitergeben. Ziel ihrer TĂ€tigkeit ist es, noch kaum erfahrenen ExistenzgrĂŒndern durch fachkundige Beratung zur Seite zu stehen, und der FĂŒhrung von in die Krise geratenen Unternehmen Hilfe zur Selbsthilfe zu bieten. --
Molecular characterization of the resistance locus Ren3 against powdery mildew (Erysiphe necator) from the grapevine cultivar 'Regent'
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