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  1. Hardt, M. (Ed.)
  2. There is a rapidly growing demand for individuals in cybersecurity and a deficit of persons able to fill those roles. To help meet this need, students not majoring in computing can be utilized to fulfill this demand by exposing them to date mining, cybersecurity practices, and applications of these concepts in the field. This paper presents findings from a twenty-one-week program in which minority undergraduate college students all members of the Reserve Officer Training Coprs (ROTC), were taught computer programming, natural language processing, data visualization, and computer vision fundamentals. Midshipmen and cadets used their newly gained knowledge, teamwork, planning, andmore »communication skills to develop a threat dectection prototype using publicly available social media data. Resuls from pre and post python assessments and post-program interviews that recorded participant attitudes and sefl-efficacy are reported to highlight the programs' effectiveness.« less
  3. This Research Full Paper presents a qualitative interview study on the effectiveness of a computing identity development listserv. The demand for diverse computing careers increases, yet African Americans continue to participate and succeed in computing fields proportionately less than their White and Asian counterparts. An individual’s computing identity can influence their performance and willingness to participate. The African American PhDs in Computer Science Listserv is an email listserv created to increase and maintain members’ sense of belonging, self-efficacy, and resilience in computing. Semistructured interviews of graduate student, faculty, and industry professional members were conducted to investigate how effective the listservmore »was at increasing and maintaining computing identity. Findings include decision making processes for joining, duration and dosage of interaction members partake, maintenance of computing resilience, members’ self-reflection, willingness to seek help, and attitudes towards computing. Recommendations were made about the listserv and if other African Americans in computing should join. Findings can be used to develop new approaches to supporting the computing identities of underrepresented groups. This paper is in conjunction with other papers in an extended case study on resilient identity development in African American computer scientists.« less
  4. To improve the academic and professional achievement of underrepresented minorities in computing, a newfound interest in innovative mentoring practices has captivated STEM education researchers. Studies suggest that virtual mentoring conversational agents can be leveraged across multiple platforms to provide supplemental mentorship, offsetting the lack of access to in-person mentorship in disadvantaged communities. A within-subjects mixed-method experiment was carried out to assess the usability of a mentoring conversational agent. Mobile interfaces (Twitter and SMS) were compared to each other and against a web-based embodied conversational agent (ECA). Results suggest that mobile interfaces are more usable than the web-based ECA. The findingsmore »from this study help to identify areas for improvement in virtual learning alternatives and other potential applications for pervasive conversational interfaces.« less
  5. Free, publicly-accessible full text available May 1, 2023
  6. Free, publicly-accessible full text available April 1, 2023
  7. Abstract We search for gravitational-wave signals associated with gamma-ray bursts (GRBs) detected by the Fermi and Swift satellites during the second half of the third observing run of Advanced LIGO and Advanced Virgo (2019 November 1 15:00 UTC–2020 March 27 17:00 UTC). We conduct two independent searches: a generic gravitational-wave transients search to analyze 86 GRBs and an analysis to target binary mergers with at least one neutron star as short GRB progenitors for 17 events. We find no significant evidence for gravitational-wave signals associated with any of these GRBs. A weighted binomial test of the combined results finds nomore »evidence for subthreshold gravitational-wave signals associated with this GRB ensemble either. We use several source types and signal morphologies during the searches, resulting in lower bounds on the estimated distance to each GRB. Finally, we constrain the population of low-luminosity short GRBs using results from the first to the third observing runs of Advanced LIGO and Advanced Virgo. The resulting population is in accordance with the local binary neutron star merger rate.« less
    Free, publicly-accessible full text available April 1, 2023
  8. Free, publicly-accessible full text available March 1, 2023
  9. Intermediate-mass black holes (IMBHs) span the approximate mass range 100−10 5   M ⊙ , between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∼150  M ⊙ providing direct evidencemore »of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200  M ⊙ and effective aligned spin 0.8 at 0.056 Gpc −3 yr −1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc −3 yr −1 .« less
    Free, publicly-accessible full text available March 1, 2023
  10. Free, publicly-accessible full text available January 1, 2023