Monte Carlo methods for lattice fields

Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.Includes bibliographical references (leaf 49).by Richard S. Crosby.B.S

Dealing with Pre-Exposure Prophylaxis-Associated Condom Migration: Changing the Paradigm for Men Who Have Sex with Men

The behavioural aspects of pre-exposure prophylaxis (PrEP) are challenging, particularly the issue of condom migration. Three vital questions are: (1) at the population-level, will condom migration lead to increases in non-viral sexually transmissible infections?; (2) how can clinic-based counselling best promote the dual use of condoms and PrEP?; and (3) in future PrEP trials, what are the ‘best practices’ that should be used to avoid type 1 and type 2 errors that arise without accounting for condom use behaviours? This communication piece addresses each question and suggests the risk of a ‘PrEP only’ focus to widening health disparities

Social Determinants of Discrimination and Access to Health Care among Transgender Women in Oregon

Purpose: Transgender women in the United States experience health disparities and limited access to gender-affirming health services. This study describes the social determinants of health that shape access to health services for transgender women in Oregon, a state with a high tally of gender-affirming policies. Methods: We conducted qualitative interviews with 25 transgender women between 18 and 39 years of age. Interviews explored the social, economic, cultural, and legal factors that shape access to health. A Qualtrics survey captured sociodemographic characteristics. We identified facilitators and barriers to accessing gender-affirming services using thematic analysis of qualitative data. Results: Our participants perceived gender-affirming health services in Oregon to be relatively trans-friendly, compared to other parts of the United States. This perception drew several transgender women in our sample to migrate to Oregon from other “more conservative” states. Facilitators included ease with legal name change (60% had completed), inclusiveness of hormone therapy in the Oregon Health Plan, and availability of informed consent hormone therapy. However, for our participants, economic and social discrimination were major limiting factors to accessing and navigating health services. Social factors exacerbated difficulties navigating and understanding health systems to achieve coverage; 20% had insurance that did not cover hormone therapy. Specialized surgeons were located in urban/suburban centers; electrolysis coverage was limited; and 10% had gender-affirming surgery. Conclusion: This study indicates that services are necessary to assist with navigating access to gender-affirming health care, even in affirming policy contexts like Oregon

Condoms are more effective when applied by males: a study of young black males in the United States

PurposeTo determine, among a sample of young black male (YBM), whether female application of male condoms for penile–vaginal intercourse would be associated with higher or lower rates of breakage or slippage. A secondary aim was to investigate if higher rates of breakage or slippage were associated with increased odds of acquiring chlamydia and/or gonorrhea.MethodsA cross-sectional study of 412 YBM, aged 15 to 23 years, was conducted in three US cities located in the Southern United States.ResultsAmong YBM reporting frequent female application of condoms, 43.5% reported one or more instance of breakage or slippage, compared with those reporting less frequent female application (27.2%, P = .003). Among YBM reporting one or more event of breakage or slippage, 25.4% tested positive for chlamydia and/or gonorrhea. In contrast, among those not reporting breakage or slippage, 17.2% tested positive (P = .047).ConclusionsFindings suggest that educational and behavioral interventions should seek to improve young women's skills relative to condom application and use. Further studies could also investigate whether intervention efforts should encourage some YBM to be responsible for their own condom application

What School Administrators Can Do to Support K-12 STEM Teachers

Retaining good teachers has and continues to be a major issue for all levels of K-12 Education. However, many things can be done at the school level to keep your good teachers. This interactive session is designed to give you good ideas about retaining your teachers from both an administrative and teacher viewpoint, as well as give you an opportunity to ask specific questions in a guided discussion format so that each of us can learn from each other

Correlates of Sexual-Risk Behaviors Among Young Black MSM: Implications for Clinic-Based Counseling Programs

This study applied an 8-item index of recent sexual-risk behaviors to young Black men who have sex with men (YBMSM) and evaluated the distribution for normality. The distribution was tested for associations with possible antecedents of sexual risk. YBMSM (N = 600), aged 16–29 years, were recruited from a sexually transmitted infection clinic, located in the southern US. Men completed an extensive audio computer-assisted self-interview. Thirteen possible antecedents of sexual risk, as assessed by the index, were selected for analyses. The 8-item index formed a normal distribution with a mean of 4.77 (SD = 1.77). In adjusted analyses, not having completed education beyond high school was associated with less risk, as was having sex with females. Conversely, meeting sex partners online was associated with greater risk, as was reporting that sex partners were drunk during sex. The obtained normal distribution of sexual-risk behaviors suggests a corresponding need to “target and tailor” clinic-based counseling and prevention services for YBMSM. Avoiding sex when partners are intoxicated may be an especially valuable goal of counseling sessions

Promoting Teen Contraceptive Use by Intervention with Their Mothers

Introduction: The purpose of this pilot study was to test a community outreach model designed to help mothers in a rural, medically underserved area navigate their teen daughters to health department services for long-acting reversible contraception (LARC) or alternative contraception. Methods: The pilot study used a single-group, post-test only design. Mothers of teen daughters (N=142) received a 1-hour, one-to-one intervention session (in outreach settings) from Community Liaisons. Mothers received training on how to communicate with their daughters about LARC and other contraceptive methods. Data were collected from June through October 2014, and analyzed in September 2015. Results: The authors re-contacted 104 of 142 mothers enrolled in the study, achieving a 73.2% retention rate. Of these, 12.5% had daughters receiving LARC. An additional 11.0% had daughters with health department–verified initiation of birth control pills. Only one correlate—whether a mother believed her daughter was having sex—was associated with receiving either LARC or birth control pills. Among those indicating they knew their daughters were having sex, 31.7% of the daughters received LARC/birth control pills. By contrast, among mothers not indicating they knew their daughters were having sex, only 2.9% had daughters receiving LARC or birth control pills. Conclusions: Findings suggest that an outreach-based program delivered directly to mothers of teen daughters may be a highly effective method for enhancing service utilization of LARC and the initiation of birth control pill use in a rural, medically underserved area

Contextual Factors and Sexual Risk Behaviors Among Young, Black Men

Young Black men (YBM), aged 13 to 24 years, face a disproportionate burden of sexually transmitted infections (STIs). STI acquisition among YBM is due to incorrect and inconsistent condom use and is exacerbated by multiple sexual partners. Sexual and reproductive health is influenced by a complex interaction of biological, psychological, and social determinants that contribute to increased risk for STI acquisition. However, there are key social determinants of sexual health that play a major role in adolescent sexual risk-taking behaviors: gender norms, environment, peers, and families as well as a desire to impregnate a woman. Associations between contextual factors (risky environmental context, desire to impregnate a woman, and peer norms supportive of unsafe sex) and sexual risk behaviors were examined among a sample of YBM attending adolescent health clinics. This study used baseline data from a randomized controlled trial (N = 702). Parental monitoring was also examined as an effect modifier of those associations. Sexual risk behaviors were the frequency of condomless vaginal sex, number of sexual partners within the previous 2 months, and lifetime number of sexual partners. Mean age was 19.7. In the adjusted model, peer norms was the only significant predictor for all sexual risk outcomes (p \u3c .05). Parental monitoring was an effect modifier for the perceived peer norms and lifetime sexual partners association (p = .053) where the effect of peer norms on lifetime sexual partners was lower for participants with higher levels of perceived parental monitoring