1,675 research outputs found
Der Einfluss des ökologischen Landbaus auf das Raumnutzungsverhalten von Feldhasen (Lepus europaeus)
Agricultural intensification (AI) negatively affects biodiversity due to e.g. high-input farming. Organic farming can counteract this negative trend. Here, we studied
movement behavior of the European brown hare (Lepus europaeus), which frequently occurs in agricultural landscapes but also suffers from AI with declining population densities. We measured home range sizes in relation to local field management (organic vs. conventional farming) in Upper Bavarian, Germany. Results showed that
home ranges sizes decreased with increasing amount of organically managed area, while there was no relationship between conventional farmed area and hares’
movement behavior. Higher resource availability in organic fields decrease home range sizes and may therefore positively influences individual fitness and possibly
boosts hare densities
Asymmetry and performance metrics for equity returns
An assumption of symmetric asset returns, together with globally risk averse utility
functions, is unappealing for fund managers and other activist investors, whose preferences
switch between risk aversion on the downside and risk seeking on the upside. A performance
return criterion is originated that is more consistent with the implicit Friedman-Savage utility
ordering. Adapted from recent developments in the income distribution literature, the proposed
metric weights the lower versus upper conditional expected returns, while a dual spread or
dispersion metric also exists. The resulting performance metric is easy to compute. A point of
departure is the conventional Sharpe performance ratio, with the empirical comparisons extending
to a range of existing performance criteria. In contrast, the proposed W-metric results in
different and more embracing performance rankings
Features of pulsed synchronization of a systems with a tree-dimensional phase space
Features of synchronization picture in the system with the limit cycle
embedded in a three-dimensional phase space are considered. By the example of
Ressler system and Dmitriev - Kislov generator under the action of a periodic
sequence of delta - function it is shown, that synchronization picture
significantly depends on the direction of pulse action. Features of
synchronization tons appeared in these models are observed.Comment: 16 pages, 11 figure
Nova tehnologija proizvodnje magnezijevih traka i limova
A new production technology for magnesium strip, based on twin-roll-casting and strip rolling was developed in Freiberg Germany. By means of this economic method it is possible to produce strips in deep drawing quality with good forming properties in order to satisfy the request for low cost Mg sheets in the automotive and electronic industry. Both, coils as single sheets, were manufactured and rolled to a thickness of 1mm(0,5 mm). The technology of the new process and the properties of the twin-roll-casted material and the final sheets are presented.Nova tehnologija proizvodnje magnezijevih traka i limova. Nova tehnologija proizvodnje magnezijevih traka utemeljena dvostruko-valjanje-lijevanje i valjanje trake je razvijeno u Freibergu-Njemačka. Motri se, ovom ekonomičnom metodom je moguća proizvoditi trake za duboko izvlačenje, sa dobrim plastičnim svojstvima uz zadovoljavajući zahtjev za nisku cijenu Mg trake za automobilsku i elektronsku industriju. Oboje, svitak i pojedinačne trake su poizvedene i valjane do debljine stjenke 1mm(0,5 mm). Prikazuje se tehnologija novog postupka i svojstva dvostrukog valjanog-lijevačkog materijala i završnih traka
Nova tehnologija proizvodnje magnezijevih traka i limova
A new production technology for magnesium strip, based on twin-roll-casting and strip rolling was developed in Freiberg Germany. By means of this economic method it is possible to produce strips in deep drawing quality with good forming properties in order to satisfy the request for low cost Mg sheets in the automotive and electronic industry. Both, coils as single sheets, were manufactured and rolled to a thickness of 1mm(0,5 mm). The technology of the new process and the properties of the twin-roll-casted material and the final sheets are presented.Nova tehnologija proizvodnje magnezijevih traka i limova. Nova tehnologija proizvodnje magnezijevih traka utemeljena dvostruko-valjanje-lijevanje i valjanje trake je razvijeno u Freibergu-Njemačka. Motri se, ovom ekonomičnom metodom je moguća proizvoditi trake za duboko izvlačenje, sa dobrim plastičnim svojstvima uz zadovoljavajući zahtjev za nisku cijenu Mg trake za automobilsku i elektronsku industriju. Oboje, svitak i pojedinačne trake su poizvedene i valjane do debljine stjenke 1mm(0,5 mm). Prikazuje se tehnologija novog postupka i svojstva dvostrukog valjanog-lijevačkog materijala i završnih traka
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