1,991 research outputs found

    Stenting versus aggressive medical therapy for intracranial arterial stenosis

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    Rethinking Joint Custody

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    A small revolution has begun in child custody law, and as yet its dimensions and ultimate direction are uncertain. Joint custody, the sharing of legal authority by divorced or separated parents over their children, is gaining acceptance as the best arrangement for most children when their parents divorce. The legal system is embracing this arrangement with remarkable enthusiasm, although until recently it was viewed as being of questionable legality and antithetical to the best interest of the child. Today, thirty states have joint custody laws, most of which have been enacted since 1980. A growing number of the more recent statutes present joint custody not only as an acceptable option that cooperative parents may choose, but as the preferred arrangement, which should be encouraged or even required by the law. Although even joint custody advocates once rejected the viability of court-ordered joint custody against the will of either parent, 8 this option is available under most of the new laws. The implications of this trend are disturbing. The principal goal of custody law is to further the best interest of the child. Joint custody legislation purports to realize this goal by encouraging both parents to remain actively involved in their child\u27s life. Two important assumptions are implicit in the recent trend: first, that parents will be able to cooperate in raising their child, regardless of whether or not they freely decided upon joint custody, and second, that the harm to the child caused by any interparental conflict will be outweighed by the benefit of continuing a parent-child relationship with both parents. Both of these assumptions are problematic. The first has no empirical support and is questionable as a general proposition. Substantial doubts about the second are raised by the growing body of social science research on divorce and interparental conflict. The potential for unfortunate results in a scheme in which courts are authorized or directed to compel joint custody also includes its less obvious but significant coercive effect upon the bargaining behavior of divorcing parents. By motivating reluctant parents to agree to joint custody, the law may produce results that are contrary to the primary objective that it is attempting to promote – the well-being of children. This Article examines joint custody and explores its implications for legal policy. Part I traces the social, cultural, and legal variables that have created an environment receptive to joint custody. Part II examines the movement toward a legal presumption favoring joint custody, and explores the impact of a legal preference for joint custody on negotiations by parties and on decisionmaking by courts. Part III explores the fairness of a joint custody presumption as a decision principle and the extent to which it promotes the best interest of children. Our analysis is based on the application of relevant empirical and theoretical social science research. We conclude in part IV that although some form of joint custody may benefit many families, the emerging legal rule is neither fair nor likely to benefit children. We propose an alternative rule that would limit the authority of courts to order joint custody to cases in which the parties voluntarily agree

    High energy gamma ray balloon instrument

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    The High Energy Gamma Ray Balloon Instrument was built in part to verify certain subsystems' performance for the Energetic Gamma Ray Experiment Telescope (EGRET) instrument, the high energy telescope to be carried on the Gamma Ray Observatory. This paper describes the instrument, the performance of some subsystems, and some relevant results

    CD4 Depletion in SIV-Infected Macaques Results in Macrophage and Microglia Infection with Rapid Turnover of Infected Cells

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    In rhesus macaques (RMs), experimental depletion of CD4+ T-cells prior to SIV infection results in higher viremia and emergence of CD4-independent SIV-envelopes. In this study we used the rhesus recombinant anti-CD4 antibody CD4R1 to deplete RM CD4+ T-cells prior to SIVmac251 infection and investigate the sources of the increased viral burden and the lifespan of productively infected cells. CD4-depleted animals showed (i) set-point viral load two-logs higher than controls; (ii) macrophages constituting 80% of all SIV vRNA+ cells in lymph node and mucosal tissues; (iii) substantial expansion of pro-inflammatory monocytes; (iv) aberrant activation and infection of microglial cells; and (v) lifespan of productively infected cells significantly longer in comparison to controls, but markedly shorter than previously estimated for macrophages. The net effect of CD4+ T-cell depletion is an inability to control SIV replication and a shift in the tropism of infected cells to macrophages, microglia, and, potentially, other CD4-low cells which all appear to have a shortened in vivo lifespan. We believe these findings have important implications for HIV eradication studies

    Rethinking Joint Custody

    Get PDF
    A small revolution has begun in child custody law, and as yet its dimensions and ultimate direction are uncertain. Joint custody, the sharing of legal authority by divorced or separated parents over their children, is gaining acceptance as the best arrangement for most children when their parents divorce. The legal system is embracing this arrangement with remarkable enthusiasm, although until recently it was viewed as being of questionable legality and antithetical to the best interest of the child. Today, thirty states have joint custody laws, most of which have been enacted since 1980. A growing number of the more recent statutes present joint custody not only as an acceptable option that cooperative parents may choose, but as the preferred arrangement, which should be encouraged or even required by the law. Although even joint custody advocates once rejected the viability of court-ordered joint custody against the will of either parent, 8 this option is available under most of the new laws. The implications of this trend are disturbing. The principal goal of custody law is to further the best interest of the child. Joint custody legislation purports to realize this goal by encouraging both parents to remain actively involved in their child\u27s life. Two important assumptions are implicit in the recent trend: first, that parents will be able to cooperate in raising their child, regardless of whether or not they freely decided upon joint custody, and second, that the harm to the child caused by any interparental conflict will be outweighed by the benefit of continuing a parent-child relationship with both parents. Both of these assumptions are problematic. The first has no empirical support and is questionable as a general proposition. Substantial doubts about the second are raised by the growing body of social science research on divorce and interparental conflict. The potential for unfortunate results in a scheme in which courts are authorized or directed to compel joint custody also includes its less obvious but significant coercive effect upon the bargaining behavior of divorcing parents. By motivating reluctant parents to agree to joint custody, the law may produce results that are contrary to the primary objective that it is attempting to promote – the well-being of children. This Article examines joint custody and explores its implications for legal policy. Part I traces the social, cultural, and legal variables that have created an environment receptive to joint custody. Part II examines the movement toward a legal presumption favoring joint custody, and explores the impact of a legal preference for joint custody on negotiations by parties and on decisionmaking by courts. Part III explores the fairness of a joint custody presumption as a decision principle and the extent to which it promotes the best interest of children. Our analysis is based on the application of relevant empirical and theoretical social science research. We conclude in part IV that although some form of joint custody may benefit many families, the emerging legal rule is neither fair nor likely to benefit children. We propose an alternative rule that would limit the authority of courts to order joint custody to cases in which the parties voluntarily agree

    Grifonin-1: A Small HIV-1 Entry Inhibitor Derived from the Algal Lectin, Griffithsin

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    Background: Griffithsin, a 121-residue protein isolated from a red algal Griffithsia sp., binds high mannose N-linked glycans of virus surface glycoproteins with extremely high affinity, a property that allows it to prevent the entry of primary isolates and laboratory strains of T- and M-tropic HIV-1. We used the sequence of a portion of griffithsin's sequence as a design template to create smaller peptides with antiviral and carbohydrate-binding properties. Methodology/Results: The new peptides derived from a trio of homologous β-sheet repeats that comprise the motifs responsible for its biological activity. Our most active antiviral peptide, grifonin-1 (GRFN-1), had an EC50 of 190.8±11.0 nM in in vitro TZM-bl assays and an EC50 of 546.6±66.1 nM in p24gag antigen release assays. GRFN-1 showed considerable structural plasticity, assuming different conformations in solvents that differed in polarity and hydrophobicity. Higher concentrations of GRFN-1 formed oligomers, based on intermolecular β-sheet interactions. Like its parent protein, GRFN-1 bound viral glycoproteins gp41 and gp120 via the N-linked glycans on their surface. Conclusion: Its substantial antiviral activity and low toxicity in vitro suggest that GRFN-1 and/or its derivatives may have therapeutic potential as topical and/or systemic agents directed against HIV-1
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