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This paper examines data derived from an application on Facebook.com that investigates the relations among members of their online social network. It confirms that online social networks are more often used to maintain weak connections but that a subset of users focus on strong connections, determines that connection intensity to both connected people predicts perceptual accuracy, and shows that intra-group...
Studies of individual biodiesel feedstocks or broad approaches that lump animal fats and vegetable oils into a single aggregate straddle the true case of imperfect but by no means inconsequential substitution among fats and oils by different users. United States biofuel policy includes a biodiesel use mandate that rises to almost 4 hm 3 by 2012, calling for biomass feedstock analysis that...
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