منابع مشابه
Caroline Haythornthwaite
This paper explores the impact of communication media and the Internet on connectivity between people. Results from a series of social network studies of media use are used as background for exploration of these impacts. These studies explored the use of all available media among members of an academic research group and among distance learners. Asking about media use as well as about the stren...
متن کاملWhat Constrains Africa ' s exports ? Caroline
We examine the effects of transit, documentation, and ports and customs delays on Africa’s exports. We find that transit delays have the most economically and statically significant effect on exports. A one day reduction in inland travel times leads to a 7 percent increase in exports. Put another way, a one day reduction in inland travel times translates into 1.5 percentage point decrease in al...
متن کاملPacking Ellipsoids with Overlap ∗ Caroline Uhler
The problem of packing ellipsoids of different sizes and shapes into an ellipsoidal container so as to minimize a measure of overlap between ellipsoids is considered. A bilevel optimization formulation is given, together with an algorithm for the general case and a simpler algorithm for the special case in which all ellipsoids are in fact spheres. Convergence results are proved and computationa...
متن کاملStephen Bond , Caroline Ingram and Steve Ryan
DART (Digital Anthropological Resources for Teaching) is a major project examining ways in which the use of online learning activities and repositories can enhance the teaching of anthropology and, by extension, other disciplines. This paper reports on one strand of DART activity, the development of customisable learning activities that can be repurposed for use in multiple contexts. Three exam...
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ژورنال
عنوان ژورنال: Archéologie médiévale
سال: 2017
ISSN: 0153-9337,2608-4228
DOI: 10.4000/archeomed.6850