نتایج جستجو برای: dose rates

تعداد نتایج: 728553  

Journal: :International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine 1980

2014
Mialy Razanajatovo Christine Föhr Markus Fischer Daniel Prati Mark van Kleunen

Many animal-pollinated plant species have been introduced to non-native regions without their usual pollinators. Nevertheless, some of these alien species managed to establish reproducing naturalized populations, which might negatively affect native plants. Recent studies have shown that many naturalized alien species can readily attract native pollinators. However, it is not known whether alie...

2000
M. Falkner M. Devetsikiotis I. Lambadaris S. Tartarelli S. Giordano Michael Devetsikiotis Sandra Tartarelli Matthias Falkner Ioannis Lambadaris Stefano Giordano

We analyze the accuracy of four methods for measuring e ective bandwidths (EBs). We also seek to point out advantages and drawbacks of the four estimators. We nd that for nite time realizations of a process the measured e ective bandwidth di ers considerably from its analytical counterpart. We also show that increasing the trace length has little impact on the accuracy of the measurements. We e...

2007
José Mata Pedro Portugal

We analyze the effects of founding conditions on the survival of new firms. We allow the effects of founding conditions to be transitory and estimate how long such effects last. Our findings indicate that founding effects are important determinants of exit rates. Moreover, in most cases, their effect on survival seems to persist without much of an attenuation for several years after the foundin...

Journal: :Iranian Journal of Environmental Health Science & Engineering 2012

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