Qiwei Han

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Lysophosphatidic acid (LPA) is present at high concentrations in ascites and plasma of ovarian cancer patients. Studies conducted in experimental models demonstrate that LPA promotes ovarian cancer invasion/metastasis by up-regulating protease expression, elevating protease activity, and enhancing angiogenic factor expression. In this study, we investigated(More)
2012 iii To my family, teachers, friends, and colleagues: Thanks for shaping me into who I am today. iv This page is intentionally left blank. and the rest of EPP and CMU-Portugal administrative staff have given me. Without great friends and colleagues, being thousands of kilometres away from my home country would be much more difficult. My deepest(More)
Recent technological advancements in smartphone have paved the way for the rapidly growing mobile commerce. As smartphone vendors launch the products with a rich variety of technical features for different end-user market segments, understanding the evolution of these features is of vital importance to all stakeholders in the smartphone industry. We address(More)
  • Qiwei Han
  • 2016
In this paper, we perform social influence analysis using a massive mobile phone dataset with two applications that are salient to the success of Mobile Network Operators (MNO). More specifically, we identify the role of social influence in subscriber churn and smartphone adoption, by applying robust identification strategies to separate social influence(More)
Understanding adoption patterns of smartphones is of vital importance to telecommunication managers in today's highly dynamic mobile markets. In this paper, we leverage the network structure and specific position of each individual in the social network to account for and measure the potential heterogeneous role of peer influence in the adoption of the(More)
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