نتایج جستجو برای: isolation distanc

تعداد نتایج: 130938  

Journal: :EMBO reports 2017
Mathieu Hénault Christian R Landry

The emergence of barriers to reproduction between two populations is one of the most important features of speciation. Among the mechanisms of reproductive isolation are incompatible interactions between gene products of the parental species that reduce the fitness of hybrid individuals. The accumulation of such incompatibilities is described by the Bateson–Dobzhansky–Muller model (BDM) [1] tha...

2008
Neelam Mehala Ratna Dahiya

--The Motor Current Signature Analysis (MCSA) is considered the most popular fault detection method now a day because it can easily detect the common machine fault such as turn to turn short ckt, cracked /broken rotor bars, bearing deterioration etc. The present paper discusses the fundamentals of Motor Current Signature Analysis (MCSA) plus condition monitoring of the induction motor using MCS...

2013
Marco Bozzano Alessandro Cimatti Marco Gario Stefano Tonetta

In this work we present a formal approach to the design of Fault Detection and Identification (FDI) components. We define a comprehensive language for the specification of FDI, and discuss how to check whether a given FDI component fulfills its specification. Then, we propose an automatic procedure to synthesize an FDI component that satisfies a given specification. The approach has been implem...

Journal: :Trends in ecology & evolution 2011
Patrik Nosil Dolph Schluter

The long-standing goal of finding genes causing reproductive isolation is being achieved. To better link the genetics with the process of speciation, we propose that 'speciation gene' be defined as any gene contributing to the evolution of reproductive isolation. Characterizing a speciation gene involves establishing that the gene affects a component of reproductive isolation; demonstrating tha...

1987
Theo Eicher Jong Woo Kang

We examine multinationals’ optimal entry modes into foreign markets as a function of market size, FDI fixed costs, tariffs and transport costs. Our results highlight why large countries are more likely to attract acquisition investment, while intermediate sized countries may be served predominantly through trade, even in the presence of high tariffs. Small countries are most likely to experienc...

2008
Claudia M. Buch Alexander Lipponer Monika Schnitzer Alessandra Guariglia Florian Heiss Joachim Winter Zhihong Yu

Recent literature on multinational firms has stressed the importance of low productivity as a barrier to the cross-border expansion of firms. However, firms typically also need external finance to finance the costs of market entry. In addition to productivity-related real barriers, financial constraints may thus restrict market entry. Building on a model of multinational firms facing real and f...

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