We introduce and analyze a new algorithm for linear classification which combines Rosenblatt 's perceptron algorithm with Helmbold and Warmuth's leave-one-out method. Like Vapnik 's maximal-margin classifier, our algorithm takes advantage of data that are linearly separable

David Lewis is one of the most influential philosophers of our age, and On the Plurality of Worlds is his magnum opus. OPW1 offers an extended development and defense of the hypothesis that there are many universes, things of the same kind as the universe in which we all live, move, and have our

in the management literature, in fact little is known about the reasons why "enriched" work sometimes leads to positive outcomes for workers and for their employing organizations. Even less is known about the relative effectiveness of various strategies for carrying out the redesign of work One reason

Social solidarity, the need to relate to significant others, has been identified as a goal that motivates students in classrooms. A study examined a specific instance of social solidarity: the relationship between influential teachers and students they have influenced. One hundred ninety present

This paper focuses on the problem of identifying influential users of micro-blogging services. Twitter, one of the most notable micro-blogging services, employs a social-networking model called “following”, in which each user can choose who she wants to “follow” to receive tweets from without

. Activities happened in Blogosphere affect the external world. One way to understand the development on Blogosphere is to find influential blog sites. There are many non-influential blog sites which form the “the long tail”. Regardless of a blog site being influential or not, there are influential bloggers

and strong social ties. At the macro level, weak ties displayed an important bridging function, allowing information to travel from one distinct subgroup of referral actors to another subgroup in the broader social system. At the micro level, strong and homophilous ties were more likely to be activated

physical community, we endeavor to identify the influential bloggers in a virtual community (a blog site). There are many non-influential blog sites (“the long tail”) and they can still have their influential bloggers. Active bloggers are not necessarily influential ones. There may be more than one

is unobtrusively observable in tweets: the use of language. We thus carry out a study of tweets- more specifically, we compare five different categories of user (one of which is influencer) and look at their language use. We find that popular and influential users linguistically structure their tweets in specific

We present evidence that many product reviews at a private label retailer’s website are submitted by customers who have not purchased the product they are reviewing. We show that these reviews are significantly more negative than other reviews. Moreover, because the reviews are influential