Deterministic nanoscale quantum spin-defect implantation and diffraction strain imaging.

Local crystallographic features negatively affect quantum spin defects by changing the local electrostatic environment, often resulting in degraded or varied qubit optical and coherence properties. Few tools exist that enable the deterministic synthesis and study of such intricate systems on the nano-scale, making defect-to-defect strain environment quantification difficult. In this paper, we highlight state-of-the-art capabilities from the U.S. Department of Energy's Nanoscale Science Research Centers that directly address these shortcomings. Specifically, we demonstrate how complementary capabilities of nano-implantation and nano-diffraction can be used to demonstrate the quantum relevant, spatially deterministic creation of neutral divacancy centers in 4H silicon carbide, while investigating and characterizing these systems on the≤25nmscale with strain sensitivities on the order of1×10-6,relevant to defect formation dynamics. This work lays the foundation for ongoing studies into the dynamics and deterministic formation of low strain homogeneous quantum relevant spin defects in the solid state.

Challenges of providing HIV pre-exposure prophylaxis across Australian clinics: qualitative insights of clinicians.

Background HIV pre-exposure prophylaxis (PrEP) has been rapidly implemented in Australia, initially through restricted access in demonstration studies, and then through prescribing across sexual health clinics and general practice settings. In 2018, PrEP was publicly subsidised for people with Medicare (universal health insurance for citizens, permanent residents and those from countries with reciprocal arrangements). There is little research examining the experiences of PrEP providers in Australia, and existing research has been primarily conducted before public subsidy. METHODS: In this qualitative study, we examine the challenges that have emerged for PrEP-providing clinicians after public subsidy for PrEP was introduced. We conducted 28 semi-structured interviews in 2019-20 with PrEP providers in two Australian states, and analysed data thematically. Participants included general practitioners (GPs), sexual health nurses and sexual health physicians. RESULTS: Sexual health services have been reconfigured to meet changing patient demand, with an emphasis on ensuring equitable financial access to PrEP. Restrictions to nurse-led PrEP frustrated some participants, given that nurses had demonstrated competence during trials. GPs were believed to be less effective at prescribing PrEP, but GP participants themselves indicated that PrEP was an easy intervention, but difficult to integrate into general practice. Participants expressed discomfort with on-demand PrEP. CONCLUSIONS: Our findings indicate that supporting ways for patients without Medicare to access PrEP inexpensively, advocating for nurse-led PrEP, and developing guidelines adapted to general practice consultations could ensure that PrEP is delivered more effectively and equitably. Additionally, PrEP providers require encouragement to build confidence in providing on-demand PrEP.

Sexual risk-taking among homeless young people in Pakistan.

Homeless young people who engage in sex work are at increased risk of HIV and other sexually transmitted infections like chlamydia, gonorrhoea, syphilis and herpes. Semi-structured interviews were conducted with 29 homeless young people between the ages of 16 and 25 years from Rawalpindi, Pakistan, to explore how sexual practices were mediated through social and contextual conditions. Participants engaged in sex for a range of reported reasons, most commonly to generate income, but also to build intimacy and to establish intimate partnerships which could bring physical protection and social and emotional support. Although participants were aware of the sexual health risks attached to condomless sex, they engaged in it due to the social obligations of intimate partnerships, financial considerations and to better manage potentially violent situations. Instead of condoms, participants used alternate methods like withdrawal, oral sex, post-sex douching and specific sexual positions. These were not always useful, and some methods might have inadvertently increased their risk of HIV. The study findings suggest that an integrated health promotion approach that goes beyond the health sector and a singular emphasis on risk awareness may help reduce young people's risk of homelessness and sexual health risks.

Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites.

The role of the alkali metal cations in halide perovskite solar cells is not well understood. Using synchrotron-based nano-x-ray fluorescence and complementary measurements, we found that the halide distribution becomes homogenized upon addition of cesium iodide, either alone or with rubidium iodide, for substoichiometric, stoichiometric, and overstoichiometric preparations, where the lead halide is varied with respect to organic halide precursors. Halide homogenization coincides with long-lived charge carrier decays, spatially homogeneous carrier dynamics (as visualized by ultrafast microscopy), and improved photovoltaic device performance. We found that rubidium and potassium phase-segregate in highly concentrated clusters. Alkali metals are beneficial at low concentrations, where they homogenize the halide distribution, but at higher concentrations, they form recombination-active second-phase clusters.

Amphetamine-Type-Stimulants (ATS) Use and Homosexuality-Related Enacted Stigma Are Associated With Depression Among Men Who Have Sex With Men (MSM) in Two Major Cities in Vietnam in 2014.

BACKGROUND: Men who have sex with men (MSM) are disproportionately affected by mental health concerns, including depression. Amphetamine-type-stimulants (ATS) use and homosexuality-related stigma and discrimination have been found associated with depression among MSM. OBJECTIVES: To assess the prevalence of depression and its associations with ATS use and homosexuality-related stigma and discrimination among MSM in Vietnam. METHODS: 622 MSM were conveniently recruited in Hanoi and Ho Chi Minh city, Vietnam, from September to December 2014. We collected information on demographic characteristics, ATS, alcohol and other drug use, sexual behaviors, homosexuality-related and discrimination stigma, and sexual sensation-seeking. Depression and suicidal thoughts were assessed by the Patient Health Questionnaire (PHQ-9). We assessed associations of depression with ATS use and homosexuality-related stigma and discrimination using logistic regression. RESULTS: Of 622 sampled MSM, 11.3% were classified as having major depression, 9.8% reported any suicidal thoughts in the last two weeks, 30.4% ever had used any ATS, 88.8% ever ad drank alcohol and 21.5% had ever used any other drugs. In multivariate analysis, depression was significantly associated with ATS use (Adjusted Odds Ratio [AOR: 2.20; (95% Confidence Interval (CI): 1.32-3.67], younger age of sexual debut with another man (AOR: 0.09; 95% CI: 0.02-0.50), and greater enacted homosexuality-related stigma (AOR: 1.97; 95% CI: 1.19-3.26). CONCLUSIONS: We found a moderate prevalence of depression among sampled MSM, which was associated with ATS use and enacted homosexuality-related stigma. We recommend integrating assessment and interventions regarding depression and methamphetamine use into gay-friendly, culturally adapted holistic HIV prevention for MSM in Vietnam.

A pilot randomized trial assessing the effects of autogenic training in early stage cancer patients in relation to psychological status and immune system responses.

Autogenic training (AT) is a type of meditation usually used for reducing stress. This pilot study describes how AT was used on a group of early stage cancer patients and the observed effect on stress-related behaviours and immune system responses. This was a randomized trial with 31 early stage breast cancer women, having received a lumpectomy and adjuvant radiotherapy. The women were randomized into two groups. Group 1 received a home visit only. Group 2 received a home visit and 2 months' weekly Autogenic training. At the beginning and end of the 2 monthly periods, the Hospital Anxiety and Depression Scale (HADS) and T and B cell markers were measured to give an indication of changes in immune system responses and measurement of anxiety and depression. At the end of the study, HADS scores and T and B cell markers remained similar in the women who did not receive AT. The women receiving AT showed a strong statistical difference for an improvement in their HADS scores and those women observed in a meditative state as opposed to a relaxed state were found to have an increase in their immune responses. This study suggests AT as a powerful self-help therapy.