منابع مشابه
How small is a small cloud?
The interplay between clouds and aerosols and their contribution to the radiation budget is one of the largest uncertainties of climate change. Most work to date has separated cloudy and cloud-free areas in order to evaluate the individual radiative forcing of aerosols, clouds, and aerosol effects on clouds. Here we examine the size distribution and the optical properties of small, sparse cumul...
متن کاملHow big is small?
Document on Standards for Acquisition, Measurement and reporting of Intravascular Ultrasound Studies clearly defines lesion and reference segment borders. Proximal or distal reference sites are defined as the site with the largest lumen proximal or distal to a stenosis but within the same segment (usually within 10 mm of the stenosis but with no major intervening branches), which may not be the...
متن کاملHow Small Can Be?
We consider the following shadow system of Gierer-Meinhardt model 8 < : A > 0; A x (0; t) = A x (1; t) = 0: where 1 < p < +1; 2r p?1 > s + 1; s 0 and > 0. We show that the monotone steady-state solution exists and linearly stable if and only if < p p ? 1 : Uniqueness and transversality of Hopf bifurcations and extension to higher dimensions are also discussed.
متن کاملHow small is too small? A systematic review of center volume and outcome after cardiac transplantation.
BACKGROUND The aim of this study was to assess the relationship between the volume of cardiac transplantation procedures performed in a center and the outcome after cardiac transplantation. METHODS AND RESULTS PubMed, Embase, and the Cochrane library were searched for articles on the volume-outcome relationship in cardiac transplantation. Ten studies were identified, and all adopted a differe...
متن کاملConservation of Mammals in Eastern North American Wildlife Reserves: How Small Is Too Small?
A common objective of methods of systematic reserve selection has been to maximize conservation benefits—frequently current species richness—while reducing the costs of acquiring and maintaining reserves. But the probability that a reserve will lose species in the future is frequently not known because the minimum area requirements for most species have not been estimated empirically. For reser...
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ژورنال
عنوان ژورنال: International Journal of Epidemiology
سال: 2008
ISSN: 0300-5771,1464-3685
DOI: 10.1093/ije/dyn232