The Best Answers? Think Twice: Online Detection of Commercial Campaigns in the CQA Forums

In an emerging trend, more and more Internet users search for information from Community Question and Answer (CQA) websites, as interactive communication in such websites provides users with a rare feeling of trust. More often than not, end users look for instant help when they browse the CQA websites for the best answers. Hence, it is imperative that they should be warned of any potential commercial campaigns hidden behind the answers. However, existing research focuses more on the quality of answers and does not meet the above need. In this paper, we develop a system that automatically analyzes the hidden patterns of commercial spam and raises alarms instantaneously to end users whenever a potential commercial campaign is detected. Our detection method integrates semantic analysis and posters' track records and utilizes the special features of CQA websites largely different from those in other types of forums such as microblogs or news reports. Our system is adaptive and accommodates new evidence uncovered by the detection algorithms over time. Validated with real-world trace data from a popular Chinese CQA website over a period of three months, our system shows great potential towards adaptive online detection of CQA spams.Comment: 9 pages, 10 figure

PrEP Education Intervention

Background: The nation’s HIV infection rate is alarming, yet only a small percentage of eligible individuals are prescribed pre-exposure prophylaxis (PrEP). This sluggish PrEP uptake may be related to lack of knowledge among non-HIV specialist providers. Thus, interventions toexpand providers’ use of PrEP as an HIV prevention strategy are needed. Objectives: The project aim was to develop an intervention to improve retail nurse practitioners’ (NP) knowledge for PrEP clinical practice, comfort screening for “at-risk HIV” patients, confidence prescribing PrEP, and likeliness to prescribe PrEP in the next six months. Methodology: An online PrEP tutorial was implemented for retail clinic NPs. There were three phases: pre-survey, post-survey, and 30-day retention survey. Paired t-tests for differences between the pre- and post-surveys were performed. ANOVA was conducted to test differences between pre-, post-, and 30-day retention surveys. Results: Paired t-tests revealed significant differences between pre- and post-surveys for knowledge, comfort, confidence, and likeliness to prescribe (p \u3c.05). Similarly, the repeated measures ANOVA revealed a significant main effect of the intervention on all constructs (p \u3c.05). Post-hoc analysis showed all constructs, except for comfort, increased betweenthe preand post-surveys and all constructs increased between pre- and retention surveys. There were no differences between post- and retention surveys for any constructs. Conclusion: By increasing knowledge related to PrEP, online education can improve NPs consultation and prescribing practices to help confront the HIV epidemic