Neutrino Telescopes' Sensitivity to Dark Matter

The nature of the dark matter of the Universe is yet unknown and most likely is connected with new physics. The search for its composition is under way through direct and indirect detection. Fundamental physical aspects such as energy threshold, geometry and location are taken into account to investigate proposed neutrino telescopes of km^3 volume sensitivities to dark matter. These sensitivities are just sufficient to test a few WIMP scenarios. Telescopes of km^3 volume, such as IceCube, can definitely discover or exclude superheavy (M > 10^10 GeV) Strong Interacting Massive Particles (Simpzillas). Smaller neutrino telescopes such as ANTARES, AMANDA-II and NESTOR can probe a large region of the Simpzilla parameter space.Comment: 28 pages, 9 figure

Screening for Prediabetes and Type 2 Diabetes: Updated Evidence Report and Systematic Review for the US Preventive Services Task Force

Importance: Type 2 diabetes is common and is a leading cause of morbidity and disability. Objective: To review the evidence on screening for prediabetes and diabetes to inform the US Preventive Services Task Force (USPSTF). Data Sources: PubMed/MEDLINE, Cochrane Library, and trial registries through September 2019; references; and experts; literature surveillance through May 21, 2021. Study Selection: English-language controlled studies evaluating screening or interventions for prediabetes or diabetes that was screen detected or recently diagnosed. Data Extraction and Synthesis: Dual review of abstracts, full-text articles, and study quality; qualitative synthesis of findings; meta-analyses conducted when at least 3 similar studies were available. Main Outcomes and Measures: Mortality, cardiovascular morbidity, diabetes-related morbidity, development of diabetes, quality of life, and harms. Results: The review included 89 publications (N = 68882). Two randomized clinical trials (RCTs) (25120 participants) found no significant difference between screening and control groups for all-cause or cause-specific mortality at 10 years. For harms (eg, anxiety or worry), the trials reported no significant differences between screening and control groups. For recently diagnosed (not screen-detected) diabetes, 5 RCTs (5138 participants) were included. In the UK Prospective Diabetes Study, health outcomes were improved with intensive glucose control with sulfonylureas or insulin. For example, for all-cause mortality the relative risk (RR) was 0.87 (95% CI, 0.79 to 0.96) over 20 years (10-year posttrial assessment). For overweight persons, intensive glucose control with metformin improved health outcomes at the 10-year follow-up (eg, all-cause mortality: RR, 0.64 [95% CI, 0.45 to 0.91]), and benefits were maintained longer term. Lifestyle interventions (most involving >360 minutes) for obese or overweight persons with prediabetes were associated with reductions in the incidence of diabetes (23 RCTs; pooled RR, 0.78 [95% CI, 0.69 to 0.88]). Lifestyle interventions were also associated with improved intermediate outcomes, such as reduced weight, body mass index, systolic blood pressure, and diastolic blood pressure (pooled weighted mean difference, -1.7 mm Hg [95% CI, -2.6 to -0.8] and -1.2 mm Hg [95% CI, -2.0 to -0.4], respectively). Metformin was associated with a significant reduction in diabetes incidence (pooled RR, 0.73 [95% CI, 0.64 to 0.83]) and reduction in weight and body mass index. Conclusions and Relevance: Trials of screening for diabetes found no significant mortality benefit but had insufficient data to assess other health outcomes; evidence on harms of screening was limited. For persons with recently diagnosed (not screen-detected) diabetes, interventions improved health outcomes; for obese or overweight persons with prediabetes, interventions were associated with reduced incidence of diabetes and improvement in other intermediate outcomes

The lived-experiences of family caregivers of mentally ill relatives

AIM: The aim of this paper is to report a study conducted to explore the meanings of the lived experiences that Chinese family caregivers in Malaysia ascribed to the care they provided to relatives with severe and persistent mental illness. BACKGROUND: In the past, many researchers have used quantitative approaches to explore the experiences of family caregivers of relatives with severe and persistent mental illness. However, the results of these studies have been far from conclusive because of serious methodological flaws. In addition, a large majority of these studies were conducted in western cultures, and it has been difficult to transfer the results to family caregivers in oriental cultures. METHOD: The philosophy of Martin Heidegger underpinned the study. Qualitative data were collected mainly through in-depth interviews with 19 criterion-selected Chinese family caregivers of relatives with severe and persistent mental illness in 2002. FINDINGS: We present the emergent themes reflecting the meaning structures of managing, enduring, and surviving the day-to-day experiences of the Chinese family caregivers. The impact of the stigma of the relatives' mental illness on family caregivers and families is pervasive and strong. As a result, family caregivers tried to avoid talking about their relative's mental illness with extended family or friends in order to protect their families from 'losing face'. In addition, most family caregivers believed that adopting positive behaviours and attitudes helped them cope with caregiving. CONCLUSION: Mental health nurses need to help Chinese family caregivers to cope with the stresses and stigmas of their relatives' mental illnesses through psychosocial education or family intervention, and to provide them with culturally-congruent care. They should also educate the public about mental health and ill health through health promotion and education