36 research outputs found
Predicting Rising Follower Counts on Twitter Using Profile Information
When evaluating the cause of one's popularity on Twitter, one thing is
considered to be the main driver: Many tweets. There is debate about the kind
of tweet one should publish, but little beyond tweets. Of particular interest
is the information provided by each Twitter user's profile page. One of the
features are the given names on those profiles. Studies on psychology and
economics identified correlations of the first name to, e.g., one's school
marks or chances of getting a job interview in the US. Therefore, we are
interested in the influence of those profile information on the follower count.
We addressed this question by analyzing the profiles of about 6 Million Twitter
users. All profiles are separated into three groups: Users that have a first
name, English words, or neither of both in their name field. The assumption is
that names and words influence the discoverability of a user and subsequently
his/her follower count. We propose a classifier that labels users who will
increase their follower count within a month by applying different models based
on the user's group. The classifiers are evaluated with the area under the
receiver operator curve score and achieves a score above 0.800.Comment: 10 pages, 3 figures, 8 tables, WebSci '17, June 25--28, 2017, Troy,
NY, US
"(Weitergeleitet von Journalistin)": The Gendered Presentation of Professions on Wikipedia
Previous research has shown the existence of gender biases in the depiction
of professions and occupations in search engine results. Such an unbalanced
presentation might just as likely occur on Wikipedia, one of the most popular
knowledge resources on the Web, since the encyclopedia has already been found
to exhibit such tendencies in past studies. Under this premise, our work
assesses gender bias with respect to the content of German Wikipedia articles
about professions and occupations along three dimensions: used male vs. female
titles (and redirects), included images of persons, and names of professionals
mentioned in the articles. We further use German labor market data to assess
the potential misrepresentation of a gender for each specific profession. Our
findings in fact provide evidence for systematic over-representation of men on
all three dimensions. For instance, for professional fields dominated by
females, the respective articles on average still feature almost two times more
images of men; and in the mean, 83% of the mentioned names of professionals
were male and only 17% female.Comment: In the 9th International ACM Web Science Conference 2017 (WebSci'17),
June 25-28, 2017, Troy, NY, USA. Based on the results of the thesis:
arXiv:1702.0082
Sharing Means Renting?: An Entire-marketplace Analysis of Airbnb
Airbnb, an online marketplace for accommodations, has experienced a
staggering growth accompanied by intense debates and scattered regulations
around the world. Current discourses, however, are largely focused on opinions
rather than empirical evidences. Here, we aim to bridge this gap by presenting
the first large-scale measurement study on Airbnb, using a crawled data set
containing 2.3 million listings, 1.3 million hosts, and 19.3 million reviews.
We measure several key characteristics at the heart of the ongoing debate and
the sharing economy. Among others, we find that Airbnb has reached a global yet
heterogeneous coverage. The majority of its listings across many countries are
entire homes, suggesting that Airbnb is actually more like a rental marketplace
rather than a spare-room sharing platform. Analysis on star-ratings reveals
that there is a bias toward positive ratings, amplified by a bias toward using
positive words in reviews. The extent of such bias is greater than Yelp
reviews, which were already shown to exhibit a positive bias. We investigate a
key issue---commercial hosts who own multiple listings on Airbnb---repeatedly
discussed in the current debate. We find that their existence is prevalent,
they are early-movers towards joining Airbnb, and their listings are
disproportionately entire homes and located in the US. Our work advances the
current understanding of how Airbnb is being used and may serve as an
independent and empirical reference to inform the debate.Comment: WebSci '1
Predicting Research that will be Cited in Policy Documents
Scientific publications and other genres of research output are increasingly
being cited in policy documents. Citations in documents of this nature could be
considered a critical indicator of the significance and societal impact of the
research output. In this study, we built classification models that predict
whether a particular research work is likely to be cited in a public policy
document based on the attention it received online, primarily on social media
platforms. We evaluated the classifiers based on their accuracy, precision, and
recall values. We found that Random Forest and Multinomial Naive Bayes
classifiers performed better overall.Comment: 2 page extended abstract submitted for ACM WebSci'17 conferenc
The Effect of Collective Attention on Controversial Debates on Social Media
We study the evolution of long-lived controversial debates as manifested on
Twitter from 2011 to 2016. Specifically, we explore how the structure of
interactions and content of discussion varies with the level of collective
attention, as evidenced by the number of users discussing a topic. Spikes in
the volume of users typically correspond to external events that increase the
public attention on the topic -- as, for instance, discussions about `gun
control' often erupt after a mass shooting.
This work is the first to study the dynamic evolution of polarized online
debates at such scale. By employing a wide array of network and content
analysis measures, we find consistent evidence that increased collective
attention is associated with increased network polarization and network
concentration within each side of the debate; and overall more uniform lexicon
usage across all users.Comment: accepted at ACM WebScience 201
Where could we go? Recommendations for groups in location-based social networks
| openaire: EC/H2020/654024/EU//SoBigDataLocation-Based Social Networks (LBSNs) enable their users to share with their friends the places they go to and whom they go with. Additionally, they provide users with recommendations for Points of Interest (POI) they have not visited before. This functionality is of great importance for users of LBSNs, as it allows them to discover interesting places in populous cities that are not easy to explore. For this reason, previous research has focused on providing recommendations to LBSN users. Nevertheless, while most existing work focuses on recommendations for individual users, techniques to provide recommendations to groups of users are scarce. In this paper, we consider the problem of recommending a list of POIs to a group of users in the areas that the group frequents. Our data consist of activity on Swarm, a social networking app by Foursquare, and our results demonstrate that our proposed Geo-Group-Recommender (GGR), a class of hybrid recommender systems that combine the group geographical preferences using Kernel Density Estimation, category and location features and group check-ins outperform a large number of other recommender systems. Moreover, we find evidence that user preferences differ both in venue category and in location between individual and group activities. We also show that combining individual recommendations using group aggregation strategies is not as good as building a profile for a group. Our experiments show that (GGR) outperforms the baselines in terms of precision and recall at different cutoffs.Peer reviewe
Pok\'emon Go: Impact on Yelp Restaurant Reviews
Pok\'emon Go, the popular Augmented Reality based mobile application,
launched in July of 2016. The game's meteoric rise in usage since that time has
had an impact on not just the mobile gaming industry, but also the physical
activity of players, where they travel, where they spend their money, and
possibly how they interact with other social media applications. In this paper,
we studied the impact of Pok\'emon Go on Yelp reviews. For restaurants near
Pok\'eStops, we found a slight drop in the number of online reviews
Paving the WAI: Defining Web-Augmented Interactions.
International audienceWe define and provide real cases of " Web-Augmented Interactions" (WAI) with the world, a new family of interactions designed to exploit resources from the Web to improve the users' experience with the devices surrounding them