نتایج جستجو برای: cliff

تعداد نتایج: 1735  

2016
Theo JOHNSON-FREYD T. Johnson-Freyd

We show that the Morita equivalences Cliff(4) ' H, Cliff(7) ' Cliff(−1), and Cliff(8) ' R arise from quantizing the Hamiltonian reductions R0|4//Spin(3), R//G2, and R0|8//Spin(7), respectively.

Journal: :زن در توسعه و سیاست 0
فخرالسادات نصیری ولیک نبی دانشیارگروه علوم تربیتی دانشگاه بوعلی سینا همدان محمد رضا اردلان دانشیارگروه علوم تربیتی دانشگاه بوعلی سینا همدان رقیه بهشتی راد دانشجوی دکتری مدیریت آموزشی دانشگاه بوعلی سینا همدان

the current study aims to examine the  effect of glass cliff on work engagement with the mediator roe of organizational silence. the statistical population consists of all formal staff of women in bu-ali university of hamedan, totally 88,   among which 52  were selected by stratified random sampling method. data were gathered through three questionnaires, the glass cliff, organizational silence...

2010
M. C. Bedjaoui M. A. Allal A. Duperret S. Taibi E. Rivoalen

The various situations representing coastal cliffs of Haute Normandy are tested on numerical models. The parameters taken into account are: the lithology of chalks and the presence or absence of fractures. It is a question of specifying the mechanical characteristics of chalk and the inside of the fractures. The chalk cliff of 80m height, with a vertical cliff face, is modeled in distinct eleme...

2017
Pascal Buri Evan S. Miles Jakob F. Steiner Walter W. Immerzeel Patrick Wagnon Francesca Pellicciotti

We use high-resolution digital elevation models (DEMs) from unmanned aerial vehicle (UAV) surveys to document the evolution of four ice cliffs on the debris-covered tongue of Lirung Glacier, Nepal, over one ablation season. Observations show that out of four cliffs, three different patterns of evolution emerge: (i) reclining cliffs that flatten during the ablation season; (ii) stable cliffs tha...

2002
JACK P. HAILMAN

E CULLEN (1957) showed that the cliff-nesting Black-legged Kittiwake (Larus (Rissa) tridactylus) differs from “typical” (i.e., ground-nesting)‘ gulls in many respects. The species’ unique morphological and behavioral characters, Cullen cogently argued, have resulted from adaptation (either directly or indirectly) to cliff-breeding. Epistemologically, the correlation between cliff-nesting and un...

Journal: :Proceedings. Biological sciences 2011
Valerie A O'Brien Amy T Moore Ginger R Young Nicholas Komar William K Reisen Charles R Brown

Determining the effect of an invasive species on enzootic pathogen dynamics is critical for understanding both human epidemics and wildlife epizootics. Theoretical models suggest that when a naive species enters an established host-parasite system, the new host may either reduce ('dilute') or increase ('spillback') pathogen transmission to native hosts. There are few empirical data to evaluate ...

2002
Jim W. Hall Ian C. Meadowcroft Mark Lee

Probabilistic methods provide a means of demonstrating the potential variability in predictions of coastal cliff recession. They form the basis for risk-based land use planning, cliff management and engineering decision-making. A range of probabilistic methods for predicting soft coastal cliff recession has now been developed, including statistical techniques, process-based simulation and struc...

Journal: :Offset 1969

Journal: :Current Biology 2004
Nigel Williams

The peregrine falcon holds a special place in the minds of environmentalists and conservation biologists. The crash in its population throughout the 1950s and 60s was linked to the rapidly increasing use of agricultural organochlorine pesticides which led to a thinning of the birds’ eggshells and dramatic breeding failure. Since the widespread ban on the use of these chemicals, populations have...

Journal: :Current Biology 2010
Nigel Williams

The asparagus season has recently ended for northern hemisphere crops. Tradition has it that, at the summer solstice, growers stop cutting spears to allow the plant to grow and produce enough resources to generate spears for the next spring’s crop. The plant is becoming increasingly fashionable and production is increasing to meet demand. But the cultivated asparagus has a wild relative that is...

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