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With the rapid development of science and technology, human free time increases exponentially, day after day. The limits of human spiritual freedom are expanding more and more. But, faced with extra...
A Time Series of Prehistoric Mitochondrial DNA Reveals Western European Genetic Diversity Was Largely Established by the Bronze Age
Europe Prehistory MtDNA Haplogroup Diversity Temporal Dynamics
2013/1/30
A major unanswered question concerns the roles of continuity versus change in prehistoric Europe. For the first time, genetic samples of reasonable size taken at multiple time points are revealing pie...
Real-Time Twitter Sentiment toward Midterm Exams
Twitter Sentiment Midterm Exam Opinion Lexicon Social Media
2013/9/5
Twitter is the most popular microblogging service today, with millions of its uers posting short messages (tweets) everyday. This huge amount of user-generated content contains rich factual and subjec...