نتایج جستجو برای: e gap

تعداد نتایج: 1149212  

2010
R. Atkinson

This document reviews the existing mechanisms for site renumbering for both IPv4 and IPv6, and it identifies operational issues with those mechanisms. It also summarises current technical proposals for additional mechanisms. Finally, there is a gap analysis identifying possible areas for future work.

2015
Kathleen Neumann Henk Hilderink

Environmental change is an acknowledged factor influencing human migration. Analytical research regarding the relationship between the environment and human migration has increased in recent years yet still faces numerous hurdles, partly due to limited availability of suitable data. We review available data and methodologies for investigating the environment-migration nexus, identifying data in...

2000
Patrick Crist

Journal: :Journal of cell science 1993
W K Lo T S Reese

Gap junctions in the epithelium and superficial fiber cells from young mice were examined in lenses prepared by rapid-freezing, and processed for freeze-substitution and freeze-fracture electron microscopy. There appeared to be three structural types of gap junction: one type between epithelial cells and two types between fiber cells. Epithelial gap junctions seen by freeze-substitution were ap...

Journal: :JSW 2014
Ahmed Alahmadi Ben Soh Azmat Ullah

E-health is a rising research area in the public health, business and medical informatics sectors and refers to health and information services that are delivered or improved by using the Internet and other related information technologies. Various aspects of e-health are discussed in the literature; however, there is a research gap in the areas of system requirements engineering and ehealth bu...

2007
Gruia Calinescu Chandra Chekuri Martin Pál Jan Vondrák

Let f : 2 → R be a non-decreasing submodular set function, and let (N, I) be a matroid. We consider the problem maxS∈I f(S). It is known that the greedy algorithm yields a 1/2-approximation [9] for this problem. It is also known, via a reduction from the max-k-cover problem, that there is no (1− 1/e+ )-approximation for any constant > 0, unless P = NP [6]. In this paper, we improve the 1/2-appr...

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