680 research outputs found

    Research on the Implementation of the NASA Joint Sponsored Research Program and other Innovative Mechanism for Commercializing NASA Funded Technologies

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    A goal of the ERAST Program is the commercial application of technology resulting from the work if the ERAST Alliance. This goal is sufficiently primary to be called out in the recitals section of the ERAST Joint Sponsored Research Agreement. In support of this goal, two activities described below were commenced in 1996 to assess and explore commercial applications of UAV technologies relevant to the ERAST Alliance

    The Joint Enterprise: Collaboration Between the Public and Private Sectors

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    This article first outlines the structures of the joint and tripartite enterprises. It then addresses two legal concerns facing an operational enterprise, the potential tort liability of enterprise participants and antitrust restrictions. Tort liability is a threshold concern of any joint venture or partnership, and antitrust law is a basic constraint on the operations of any business. The article proceeds to show that the problems they pose for a joint enterprise can be minimized or avoided. In the third part of the article the authors demonstrate the special utility of the joint enterprise

    MTN-001: Randomized Pharmacokinetic Cross-Over Study Comparing Tenofovir Vaginal Gel and Oral Tablets in Vaginal Tissue and Other Compartments

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    Background: Oral and vaginal preparations of tenofovir as pre-exposure prophylaxis (PrEP) for human immunodeficiency virus (HIV) infection have demonstrated variable efficacy in men and women prompting assessment of variation in drug concentration as an explanation. Knowledge of tenofovir concentration and its active form, tenofovir diphosphate, at the putative vaginal and rectal site of action and its relationship to concentrations at multiple other anatomic locations may provide key information for both interpreting PrEP study outcomes and planning future PrEP drug development. Objective: MTN-001 was designed to directly compare oral to vaginal steady-state tenofovir pharmacokinetics in blood, vaginal tissue, and vaginal and rectal fluid in a paired cross-over design. Methods and Findings: We enrolled 144 HIV-uninfected women at 4 US and 3 African clinical research sites in an open label, 3-period crossover study of three different daily tenofovir regimens, each for 6 weeks (oral 300 mg tenofovir disoproxil fumarate, vaginal 1% tenofovir gel [40 mg], or both). Serum concentrations after vaginal dosing were 56-fold lower than after oral dosing (p<0.001). Vaginal tissue tenofovir diphosphate was quantifiable in ≥90% of women with vaginal dosing and only 19% of women with oral dosing. Vaginal tissue tenofovir diphosphate was ≥130-fold higher with vaginal compared to oral dosing (p<0.001). Rectal fluid tenofovir concentrations in vaginal dosing periods were higher than concentrations measured in the oral only dosing period (p<0.03). Conclusions: Compared to oral dosing, vaginal dosing achieved much lower serum concentrations and much higher vaginal tissue concentrations. Even allowing for 100-fold concentration differences due to poor adherence or less frequent prescribed dosing, vaginal dosing of tenofovir should provide higher active site concentrations and theoretically greater PrEP efficacy than oral dosing; randomized topical dosing PrEP trials to the contrary indicates that factors beyond tenofovir's antiviral effect substantially influence PrEP efficacy. Trial Registration: ClinicalTrials.gov NCT00592124

    Carrots and sticks fail to change behavior in cocaine addiction.

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    Cocaine addiction is a major public health problem that is particularly difficult to treat. Without medically proven pharmacological treatments, interventions to change the maladaptive behavior of addicted individuals mainly rely on psychosocial approaches. Here we report on impairments in cocaine-addicted patients to act purposefully toward a given goal and on the influence of extended training on their behavior. When patients were rewarded for their behavior, prolonged training improved their response rate toward the goal but simultaneously rendered them insensitive to the consequences of their actions. By contrast, overtraining of avoidance behavior had no effect on patient performance. Our findings illustrate the ineffectiveness of punitive approaches and highlight the potential for interventions that focus on improving goal-directed behavior and implementing more desirable habits to replace habitual drug-taking.Sir Henry Wellcome Postdoctoral Fellowship (Grant ID: 101521/Z/12/Z)This is the author accepted manuscript. The final version is available from AAAS via http://dx.doi.org/10.1126/science.aaf370

    Impulsivity in abstinent alcohol and polydrug dependence: a multidimensional approach.

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    RATIONALE: Dependence on drugs and alcohol is associated with impaired impulse control, but deficits are rarely compared across individuals dependent on different substances using several measures within a single study. OBJECTIVES: We investigated impulsivity in abstinent substance-dependent individuals (AbD) using three complementary techniques: self-report, neuropsychological and neuroimaging. We hypothesised that AbDs would show increased impulsivity across modalities, and that this would depend on length of abstinence. METHODS: Data were collected from the ICCAM study: 57 control and 86 AbDs, comprising a group with a history of dependence on alcohol only (n = 27) and a group with history of dependence on multiple substances ("polydrug", n = 59). All participants completed self-report measures of impulsivity: Barratt Impulsiveness Scale, UPPS Impulsive Behaviour Scale, Behaviour Inhibition/Activation System and Obsessive-Compulsive Inventory. They also performed three behavioural tasks: Stop Signal, Intra-Extra Dimensional Set-Shift and Kirby Delay Discounting; and completed a Go/NoGo task during fMRI. RESULTS: AbDs scored significantly higher than controls on self-report measures, but alcohol and polydrug dependent groups did not differ significantly from each other. Polydrug participants had significantly higher discounting scores than both controls and alcohol participants. There were no group differences on the other behavioural measures or on the fMRI measure. CONCLUSIONS: The results suggest that the current set of self-report measures of impulsivity is more sensitive in abstinent individuals than the behavioural or fMRI measures of neuronal activity. This highlights the importance of developing behavioural measures to assess different, more relevant, aspects of impulsivity alongside corresponding cognitive challenges for fMRI.This article presents independent research funded by the Medical Research Council as part of their addiction initiative (grant number G1000018). GSK kindly funded the functional and structural MRI scans that took place at Imperial College. The research was carried out at the NIHR/Wellcome Trust Imperial Clinical Research Facility, the NIHR/Wellcome Trust Cambridge Research Facility and Clinical Trials Unit at Salford Royal NHS Foundation Trust, and is supported by the North West London, Eastern and Greater Manchester NIHR Clinical Research Networks.This is the final version of the article. It first appeared from Springer via http://dx.doi.org/10.1007/s00213-016-4245-

    The ICCAM platform study: An experimental medicine platform for evaluating new drugs for relapse prevention in addiction. Part B: fMRI description.

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    OBJECTIVES: We aimed to set up a robust multi-centre clinical fMRI and neuropsychological platform to investigate the neuropharmacology of brain processes relevant to addiction - reward, impulsivity and emotional reactivity. Here we provide an overview of the fMRI battery, carried out across three centres, characterizing neuronal response to the tasks, along with exploring inter-centre differences in healthy participants. EXPERIMENTAL DESIGN: Three fMRI tasks were used: monetary incentive delay to probe reward sensitivity, go/no-go to probe impulsivity and an evocative images task to probe emotional reactivity. A coordinate-based activation likelihood estimation (ALE) meta-analysis was carried out for the reward and impulsivity tasks to help establish region of interest (ROI) placement. A group of healthy participants was recruited from across three centres (total n=43) to investigate inter-centre differences. Principle observations: The pattern of response observed for each of the three tasks was consistent with previous studies using similar paradigms. At the whole brain level, significant differences were not observed between centres for any task. CONCLUSIONS: In developing this platform we successfully integrated neuroimaging data from three centres, adapted validated tasks and applied whole brain and ROI approaches to explore and demonstrate their consistency across centres.Medical Research Council (Grant ID: G1000018), GlaxoSmithKlineThis is the author accepted manuscript. The final version is available from SAGE Publications via http://dx.doi.org/10.1177/026988111666859

    Lunar Surface Systems Supportability Technology Development Roadmap

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    The Lunar Surface Systems Supportability Technology Development Roadmap is a guide for developing the technologies needed to enable the supportable, sustainable, and affordable exploration of the Moon and other destinations beyond Earth. Supportability is defined in terms of space maintenance, repair, and related logistics. This report considers the supportability lessons learned from NASA and the Department of Defense. Lunar Outpost supportability needs are summarized, and a supportability technology strategy is established to make the transition from high logistics dependence to logistics independence. This strategy will enable flight crews to act effectively to respond to problems and exploit opportunities in an environment of extreme resource scarcity and isolation. The supportability roadmap defines the general technology selection criteria. Technologies are organized into three categories: diagnostics, test, and verification; maintenance and repair; and scavenge and recycle. Furthermore, "embedded technologies" and "process technologies" are used to designate distinct technology types with different development cycles. The roadmap examines the current technology readiness level and lays out a four-phase incremental development schedule with selection decision gates. The supportability technology roadmap is intended to develop technologies with the widest possible capability and utility while minimizing the impact on crew time and training and remaining within the time and cost constraints of the program

    How Unique Are Our Users? Part 2: Comparing Responses Regarding the Information-Seeking Habits of Education Faculty

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    This follow-up study examines whether or not findings of single institution studies are applicable to other institutions by performing an institution-to-institution comparison of the results obtained from an information-seeking behavior survey sent to education faculty at twenty research institutions. The results from this study corroborated what was found in the previous study conducted on the information-seeking behavior of engineering faculty in 2009. It indicates that general information about information-seeking behavior of faculty holds true across institutions, while information related to specific library services or facilities should be validated locally.Ye

    Information-Seeking Habits of Education Faculty

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    This study explores the information-seeking behavior of academic education faculty from twenty large public research universities. The investigation includes an examination of how frequently education faculty seek or access information, how they stay up-to-date on current developments in the field and identify less recent journal literature, how valuable library resources and services are to their information needs, and the importance of library research to the field of education. The responses from the survey participants emphasize the importance of electronic access to scholarly journals and library databases and the continuing value of books, both print and electronic, for meeting the information and research needs of education faculty.Ye

    Impact of State Abortion Policies on Family Medicine Practice and Training After Dobbs v Jackson Women’s Health Organization

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    PURPOSE The Dobbs v Jackson Women’s Health Organization (Dobbs) Supreme Court decision revoked the constitutional right to abortion. Now, restrictive state abortion laws may con- tribute to the shortage and strain already felt in primary care practice, especially related to the provision of reproductive health care. The purpose of this study is to evaluate perceived impacts of state abortion legislation on family medicine clinicians’ practice and medical edu- cation regarding reproductive health care. METHODS Ten questions were added to the 2022 Council of Academic Family Medicine Educational Research Alliance general membership survey to evaluate impact on relevant themes in reproductive health care and training after the Dobbs decision. Responses were categorized by severity of restriction of state abortion policies. RESULTS Of 1,196 respondents, 49.7% reported employment in states with very restrictive or restrictive abortion policies. The 991 respondents with clinical responsibilities reported significant (P \u3c.05) changes in their counseling practices, clinical decision making, worry of legal risks, and trust in patients’ self-reported reproductive medical history, compared with peers in protective states. Perceived patient trust toward clinicians remained unchanged. Almost one-half of clinical respondents reported an absence of reproductive health care guidance or recommendations. Restrictive abortion policies significantly (P \u3c.05) reduced the desirability and confidence in resident training programs. CONCLUSIONS Reported changes to clinical activities and training, coming early after the Dobbs decision, affect our current and future workforce and therefore, our patients. Future studies are needed to document continued impact of state restrictions and inform policy to support family medicine clinicians in reproductive health practice and education
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