نتایج جستجو برای: regimes

تعداد نتایج: 41320  

Journal: :Ecology letters 2017
Shana M Sundstrom Tarsha Eason R John Nelson David G Angeler Chris Barichievy Ahjond S Garmestani Nicholas A J Graham Dean Granholm Lance Gunderson Melinda Knutson Kirsty L Nash Trisha Spanbauer Craig A Stow Craig R Allen

Research on early warning indicators has generally focused on assessing temporal transitions with limited application of these methods to detecting spatial regimes. Traditional spatial boundary detection procedures that result in ecoregion maps are typically based on ecological potential (i.e. potential vegetation), and often fail to account for ongoing changes due to stressors such as land use...

2006
Walt Detmar Meurers

Background The topic Word order and FLT Approaches List and match Deep processing Our perspective and approach Two types of word order errors Phrasal verbs Adverb placement Summary References Towards a treatment of word order errors When to use deep processing – and when not to

2014
Louis Chauvel

University of North Carolina at Chapel Hill. All rights reserved. For permissions, please e-mail: [email protected]. Social Forces 92(4) 1259–1283, June 2014 doi: 10.1093/sf/sot156 Advance Access publication on 28 February 2014 This research project received the support of the Luxembourg Fonds National de la Recherche (FNR), FNR/P11/05 & FNR/P11/05bis. The authors would also like to ...

1997
V. I. Yukalov

Spin relaxation in a microscopic model of spin maser is studied theoretically. Seven qualitatively different regimes are found: free induction, collective induction, free relaxation, collective relaxation, weak superradiance, pure superradiance, and triggered superradi-ance. The initiation of relaxation can be originated either by an imposed initial coherence or by local spin fluctuations due t...

1997
CARL N. SKINNER

Fire has been an important ecosystem process in the Sierra Nevada for thousands of years. Before the area was settled in the 1850s, fires were generally frequent throughout much of the range. The frequency and severity of these fires varied spatially and temporally depending upon climate, elevation, topography, vegetation, edaphic conditions, and human cultural practices. Current management str...

2015
Christophe Berthon Jose Carrillo F. Hoffmann Alina Chertock Frederic Coquel Pierre Degond

Abstract. This presentation concerns the numerical approximation of a PDE system which models cell movements according to a chemoattractant concentration. The system under consideration turns out to couple a hyperbolic system with a diffusive equation. The solutions of such a model satisfy several properties to be preserved at the numerical level. Indeed, the solutions may contain vacuum, satis...

ژورنال: علوم آب و خاک 2013
زهرا کیانی سلمی, , شجاع قربانی دشتکی, , فایز رئیسی گهروئی , , نجمه قربانی قهفرخی, ,

Free and uncontrolled pasture grazing by animals may decrease soil aggregate stability through reductions in plant cover and subsequent soil organic C, and trampling. This could expose the soil surface layer to degradation and erosion. The objective of this study was to determine the influence of pasture management (free grazing, controlled grazing and long-term non-grazing regimes) on aggregat...

A.R. Sepaskhah, M.R. Abbasi

Due to increasing water and growing demand for food a more efficient water use system is needed for agriculture. This is more evidence for rice production with a higher water use for economical production. A large cultivar×water regime interaction exists for grain yield in rice. Therefore, information is required to adopt new rice cultivars with high yield potential under water-saving condition...

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