In this paper, we address exploratory analysis of textual data streams and we propose a bootstrapping process based on a combination of keyword similarity and clustering techniques to: i) classify documents into fine-grained similarity clusters, based on keyword commonalities; ii) aggregate similar clusters into larger document collections sharing a richer, more user-prominent keyword set that ...

time no longer exists as an objective physical reality. “When even the gravitational field—geometry i n c a r n a t e — becomes a noncommuting (and hence nonlinear) operator, how can the classical interpretation of Gμν as a geometric entity be sustained? Now not only the observer, but the very concept of geometry, becomes relational and contextual.” The article might have passed unnoticed in th...

Background Cancer/testis antigens is a group of proteins which expression is usually restricted to the human germ line but is also present at high levels in several types of cancer cells [1]. The antigen NY-ESO-1 is one of these antigens showing high immunogenicity and, therefore, holding great potential for a cancer vaccine [2]. Its heterologous expression is being tested in different expressi...

The New York Times declared 2012 as the year of the Massive Online Open Courses (MOOC). This also proves that MOOC is the latest and the most successful development in online education. These online courses are designed for large-scale participation, freely available with free access to all course materials, available through any web browser on any mobile device or computer The talk summarizes ...

The total number of popular search engines has decreased over time from its peak of the late 1990s. However, when combining the three remaining major ones (Yahoo!, Google, MS Live) with large repositories of information (e.g. BBC.com, NYT.com, Gazeta.pl, etc.), the total number of important information sources can be seen as slowly increasing. Focusing on utilization of search engines only, it ...

Encountering this sort of statement in the documentation of opinion poll data we were analyzing in political science: “A weight is assigned to each sample record, and MUST be used for all tabulations.” (This particular version was in the codebook for the 1988 CBS News/New York Times Poll; as you can see, this is a problem that has been bugging me for a long time.) Computing weighted averages is...

Socioscientific controversies are “extended argumentative engagements over socially significant issues ... comprising communicative events and practices in and from both scientific and nonscientific spheres” (Stewart, 2009, p. 125). While global warming is not controversial among the vast majority of climate scientists, socioscientific controversies over global warming abound in various media, ...

All surveys with less than full response potentially suffer from nonresponse bias. Poststratification weights can only correct for selection into the sample based on observables whose distribution is known in the population. Variables such as gender, race, income, and region satisfy this requirement because they are available from the U.S. Census Bureau, but poststratification based on these va...

This study investigates a range of traditional and technological factors that contribute to credibility perceptions for three categories of online news sources. These sources include mainstream (usatoday.com, nytimes.com), independent (thedrudgereport.com, axisoflogic.com), and index-type (news.google.com, yahoo.news.com) websites. While traditional dimensions of credibility remain influential,...

In the following supplemental material we provide some additional details and derivations for the paper. We begin by showing how to calculate the joint distribution of p(β, z), marginalizing out π, in Section 1. Then, in Section 2 we consider looking at joint log-likelihoods of HDP topic models and show that the typical set of the distribution is very far from the mode. In Sections 3-4, we give...