542 research outputs found

    Gravitating defects of codimension-two

    Get PDF
    Thin gravitating defects with conical singularities in higher codimensions and with generalized Israel matching conditions are known to be inconsistent for generic energy-momentum. A way to remove this inconsistency is proposed and is realized for an axially symmetric gravitating codimension-two defect in six dimensional Einstein gravity. By varying with respect to the brane embedding fields, alternative matching conditions are derived, which are generalizations of the Nambu-Goto equations of motion of the defect, consistent with bulk gravity. For a maximally symmetric defect the standard picture is recovered. The four-dimensional perfect fluid cosmology coincides with conventional FRW in the case of radiation, but for dust it has rho^{4/3} instead of rho. A four-dimensional black hole solution is presented having the Schwarzschild form with a short-distance correction r^{-2}.Comment: Minor changes, to appear in Classical and Quantum Gravit

    Sociological and Human Developmental Explanations of Crime: Conflict or Consensus

    Get PDF
    This paper examines multidisciplinary correlates of delinquency in an attempt to integrate sociological and environmental theories of crime with human developmental and biological explanations of crime. Structural equation models are applied to assess links among biological, psychological, and environmental variables collected prospectively from birth through age 17 on a sample of 800 black children at high risk for learning and behavioral disorders. Results show that for both males and females, aggression and disciplinary problems in school during adolescence are the strongest predictors of repeat offense behavior. Whereas school achievement and family income and stability are also significant predictors of delinquency for males, early physical development is the next strongest predictor for females. Results indicate that some effects on delinquency also vary during different ages. It is suggested that behavioral and learning disorders have both sociological and developmental correlates and that adequate educational resources are necessary to ensure channels of legitimate opportunities for high-risk youths

    ‘It's a part of me, I feel naked without it': choice, agency and identity for Muslim women who wear the niqab

    Get PDF
    In the context of heightened suspicion and anti-Muslim stereotypes in a post-9/11 and 7/7 era, Muslim women who wear the niqab (face veil) are stigmatised, criminalised and marked as ‘dangerous’ to British/Western values. Several countries have imposed bans on the wearing of face veils in public places based on the premise that the niqab is a ‘threat’ to notions of gender equality, integration and national security. While the wearing of the niqab has elicited a good deal of media, political and public debates, little attention has been paid to the opinions of Muslim women who wear it. Drawing on individual and focus group interviews with Muslim women who wear the niqab in the United Kingdom (UK), this article places at the centre of the debate the voices of those women who do wear it, and explores their reasons for adopting it. The findings show that the wearing of the niqab emerges as a personal choice, an expression of religious piety, public modesty and belonging to the ‘ummah’. It is also perceived as a form of agency, resistance and non-conformity to Western consumerist culture and lifestyle. It will be concluded that wearing the niqab empowers women in their public presence and offers them a sense of ‘liberation’, which is associated with the notion of anonymity that it provides them

    A randomised, independent groups study investigating the sympathetic nervous system responses to two manual therapy treatments in patients with LBP

    Get PDF
    Manual therapy (MT) and exercise therapy techniques are commonly utilised, guideline recommended treatment strategies in the management of non-specific low back pain (LBP). Preliminary evidence on asymptomatic participants indicates that two manual therapy techniques; repeated lumbar extension in lying exercise (EIL); and segmental rotational grade V manipulation (manipulation), have significant effects on the sympathetic nervous system (SNS) as detectable with skin conductance (SC) responses. However, it is not known if these responses occur in patients with LBP. A randomised, independent group's design was utilised to investigate the immediate SC responses in 50 patients with LBP of less than 12 weeks duration. Patients received either the manipulation technique (n = 25) or the EIL exercise (n = 25) and SC activity was recorded, in a single treatment session, pre-, peri- and post-treatment. Both treatments resulted in a sympatho-excitatory response during the intervention period with the manipulation technique having a 255% increase (p <0.005), and the EIL technique a 94% increase (p = 0.019) with both treatments having responses that were sustained into the final rest period (p <0.005). Between-group comparisons indicate that the manipulation technique had a significantly greater magnitude of effect (p <0.001). The results support the sympatho-excitatory responses seen in normative studies but challenge the assumption that normative and patient populations are analogous with respect to the magnitude of effect observed and suggest that SC responses may be a feasible, proxy method of detecting dorsal horn sensitisation and neuro-plastic adaptations occurring in the presence of LBP

    Depression and Sexual Orientation During Young Adulthood: Diversity Among Sexual Minority Subgroups and the Role of Gender Nonconformity.

    Get PDF
    Sexual minority individuals are at an elevated risk for depression compared to their heterosexual counterparts, yet less is known about how depression status varies across sexual minority subgroups (i.e., mostly heterosexuals, bisexuals, and lesbians and gay men). Moreover, studies on the role of young adult gender nonconformity in the relation between sexual orientation and depression are scarce and have yielded mixed findings. The current study examined the disparities between sexual minorities and heterosexuals during young adulthood in concurrent depression near the beginning of young adulthood and prospective depression 6 years later, paying attention to the diversity within sexual minority subgroups and the role of gender nonconformity. Drawn from the National Longitudinal Study of Adolescent Health (N = 9421), we found that after accounting for demographics, sampling weight, and sampling design, self-identified mostly heterosexual and bisexual young adults, but not lesbians and gay men, reported significantly higher concurrent depression compared to heterosexuals; moreover, only mostly heterosexual young adults were more depressed than heterosexuals 6 years later. Furthermore, while young adult gender nonconforming behavior was associated with more concurrent depression regardless of sexual orientation, its negative impact on mental health decreased over time. Surprisingly, previous gender nonconformity predicted decreased prospective depression among lesbians and gay men whereas, among heterosexual individuals, increased gender nonconformity was not associated with prospective depression. Together, the results suggested the importance of investigating diversity and the influence of young adult gender nonconformity in future research on the mental health of sexual minorities.The authors acknowledge support for this research: the University of Arizona Norton School of Family and Consumer Sciences Fitch Nesbitt Endowment and a University of Arizona Graduate Access Fellowship to the second author. This research uses data from Add Health, a program project directed by Kathleen Mullan Harris and designed by J. Richard Udry, Peter S. Bearman, and Kathleen Mullan Harris at the University of North Carolina at Chapel Hill, and funded by grant P01-HD31921 from the Eunice Kennedy Shriver National Institute of Child Health and Human Development, with cooperative funding from 23 other federal agencies and foundations. Special acknowledgment is due Ronald R. Rindfuss and Barbara Entwisle for assistance in the original design. Information on how to obtain the Add Health data files is available on the Add Health website (http://​www.​cpc.​unc.​edu/​addhealth). No direct support was received from grant P01-HD31921 for this analysis. The authors thank Noel Card and Susan Stryker for comments on the previous versions of this article and Richard Lippa and Katerina Sinclair for methodological and statistical consult. The authors also thank the anonymous reviewers and the Editor for their helpful comments.This is the accepted manuscript of a paper published in Archives of Sexual Behavior (Li G, Pollitt AM, Russell ST, Archives of Sexual Behavior 2015, doi:10.1007/s10508-015-0515-3). The final version is available at http://dx.doi.org/10.1007/s10508-015-0515-3

    Proliferative cells in racemose neurocysticercosis have an active MAPK signalling pathway and respond to metformin treatment

    Get PDF
    Racemose neurocysticercosis is an aggressive infection caused by the aberrant expansion of the cyst form of Taenia solium within the subarachnoid spaces of the human brain and spinal cord, resulting in the displacement of the surrounding host tissue and chronic inflammation. We previously demonstrated that the continued growth of the racemose bladder wall is associated with the presence of mitotically active cells but the nature and control of these proliferative cells are not well understood. Here, we demonstrated by immunofluorescence that the racemose cyst has an active mitogen-activated protein kinases (MAPK) signalling pathway that is inhibited after treatment with metformin, which reduces racemose cell proliferation in vitro, and reduces parasite growth in the murine model of Taenia crassiceps cysticercosis. Our findings indicate the importance of insulin receptor-mediated activation of the MAPK signalling pathway in the proliferation and growth of the bladder wall of the racemose cyst and its susceptibility to metformin action. The antiproliferative action of metformin may provide a new therapeutic approach against racemose neurocysticercosis

    Enhancing West Nile Virus Surveillance, United States

    Get PDF
    We provide a method for constructing a county-level West Nile virus risk map to serve as an early warning system for human cases. We also demonstrate that mosquito surveillance is a more accurate predictor of human risk than monitoring dead and infected wild birds
    corecore