Data Set Used
In crowdsourced systems, it is often difficult to separate the highly capable "experts" from the average worker. In this paper, we study the problem of evaluating and identifying experts in the context of SeekingAlpha and StockTwits, two crowdsourced investment services that are encroaching on a space dominated for decades by large investment banks. We seek… (More)
For decades, the world of financial advisors has been dominated by large investment banks such as Goldman Sachs. In recent years, user-contributed investment services such as SeekingAlpha and StockTwits have grown to millions of users. In this paper, we seek to understand the quality and impact of content on social investment platforms, by empirically… (More)
We address the problem of limited Internet access and content creation in developing regions, where free access to information may be controlled for political or technological reasons. The goal is to develop a technical solution to address the accessibility, censorship, and privacy challenges that restrict OSN usage, leveraging popular OSN's such as Twitter… (More)
and Enterprise Networks. Much of my work is measurement and data driven. The goal is to uncover emerging security threats through large-scale data analytics and modeling. Based on the insights obtained from massive data analytics, I develop practical security solutions to protect online systems and users.
Research Interests My research interests include Measuring and modeling of Online Social Networks (OSNs), crowdsourcing platforms , and the corresponding security and privacy issues. Most of my works are data-driven and modeling based. The goal is to make use of the data (of all kinds), and obtain intrivial and underground knowledge from the data. • Wisdom… (More)
Research Interests My primary research interest is Security and Privacy in Internet systems such as Online Social Networks, Crowdsourcing Systems, Mobile Networks, and Enterprise Networks. Much of my work is measurement and data driven. The goal is to uncover emerging security threats through large-scale data analytics and modeling. Based on the insights… (More)
Research Interests My primary research interest is Security and Privacy in computer and user based systems such as Online Social Networks, Mobile Networks, Enterprise Networks and Crowdsourcing Systems. Much of my work is measurement and data driven. The goal is to uncover emerging threats through large-scale data collection, analytics and modeling. Based… (More)