Who Will Retweet This? Automatically Identifying and Engaging Strangers on Twitter to Spread Information

There has been much effort on studying how social media sites, such as Twitter, help propagate information in different situations, including spreading alerts and SOS messages in an emergency. However, existing work has not addressed how to actively identify and engage the right strangers at the right time on social media to help effectively propagate intended information within a desired time frame. To address this problem, we have developed two models: (i) a feature-based model that leverages peoples' exhibited social behavior, including the content of their tweets and social interactions, to characterize their willingness and readiness to propagate information on Twitter via the act of retweeting; and (ii) a wait-time model based on a user's previous retweeting wait times to predict her next retweeting time when asked. Based on these two models, we build a recommender system that predicts the likelihood of a stranger to retweet information when asked, within a specific time window, and recommends the top-N qualified strangers to engage with. Our experiments, including live studies in the real world, demonstrate the effectiveness of our work

Answerer engagement in an enterprise social question & answering system

Many studies about social question and answer (Social Q&A) platforms have focused on the recommendation algorithms designed to find the right person for the question. But very little literature has investigated how to motivate the selected potential answerers to answer a question, especially in an enterprise setting. In this work, we designed an in-situ experiment in an enterprise social Q&A system to understand how different design aspects (e.g., exposing relationship information, directly asking the answerer, indicating question’s importance and urgency, and using virtual points as incentives) could influence answerers' engagement behaviors. We found that two design features examined in the experiment can affect answerers’ viewing and answering behaviors. These findings lead to specific design recommendations, which are also discussed in the paper

Is Anyone Out There? Unpacking Q&A Hashtags on Twitter

In addition to posting news and status updates, many Twitter users post questions that seek various types of subjective and objective information. These questions are often labeled with "Q&A" hashtags, such as #lazyweb or #twoogle. We surveyed Twitter users and found they employ these Q&A hashtags both as a topical signifier (this tweet needs an answer!) and to reach out to those beyond their immediate followers (a community of helpful tweeters who monitor the hashtag). However, our log analysis of thousands of hashtagged Q&A exchanges reveals that nearly all replies to hashtagged questions come from a user's immediate follower network, contradicting user's beliefs that they are tapping into a larger community by tagging their question tweets. This finding has implications for designing next-generation social search systems that reach and engage a wide audience of answerers

The impact of studying abroad on students’ intercultural competence: An interview study

This paper presents qualitative research examining to what extent sojourns abroad engage their participants in intercultural interactions and whether or not such experience translates into students’ intercultural growth. The results of the study demonstrated that studying abroad did not provide students with ample opportunities to immerse into the local community and fully discover a new cultural environment. However, students surrounded by local and their fellow international students met foreign cultures, which motivated them to explore and interpret the encountered diversity, and thus equipped them with knowledge about foreign cultures, sensitizing them to cultural diversity. Sometimes such contacts challenged students’ preconceived judgments and stereotypes of specific cultural groups, their ways of thinking, valuing and acting, and resulted, to a lesser or greater extent, in rethinking these, leading to changing attitudes and values. International experiences also stimulated students to self-analyze their own cultural identity, and thereby contributed to their growth in self-awareness in this respect. By offering opportunities for experiencing cultural differences and prompting students to develop coping strategies and to make references to the home culture, the sojourn is thus of significant importance for tertiary students, allowing for fostering their intercultural development to a certain degree

Sex workers perspectives on strategies to reduce sexual exploitation and HIV risk: a qualitative study in Tijuana, Mexico.

Globally, female sex workers are a population at greatly elevated risk of HIV infection, and the reasons for and context of sex industry involvement have key implications for HIV risk and prevention. Evidence suggests that experiences of sexual exploitation (i.e., forced/coerced sex exchange) contribute to health-related harms. However, public health interventions that address HIV vulnerability and sexual exploitation are lacking. Therefore, the objective of this study was to elicit recommendations for interventions to prevent sexual exploitation and reduce HIV risk from current female sex workers with a history of sexual exploitation or youth sex work. From 2010-2011, we conducted in-depth interviews with sex workers (n = 31) in Tijuana, Mexico who reported having previously experienced sexual exploitation or youth sex work. Participants recommended that interventions aim to (1) reduce susceptibility to sexual exploitation by providing social support and peer-based education; (2) mitigate harms by improving access to HIV prevention resources and psychological support, and reducing gender-based violence; and (3) provide opportunities to exit the sex industry via vocational supports and improved access to effective drug treatment. Structural interventions incorporating these strategies are recommended to reduce susceptibility to sexual exploitation and enhance capacities to prevent HIV infection among marginalized women and girls in Mexico and across international settings