225 research outputs found

    A Multi-Phase, Mixed-Method Regional Analysis of Lake and Reservoir Based Recreational Opportunities in Utah

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    Planning and managing outdoor recreational resources at larger spatial scales, conceptualized as a regional approach to recreation planning and management, is studied. Considering and understanding the role of spatial scale has been beneficial to the field of ecology; however, the importance of spatial scale has rarely been considered in the recreation resource management literature. A regional approach to planning and management is differentiated from a site-specific approach as managers and planners must consider the implications of management actions or policies at a larger spatial scale than a single park, recreation area, lake, or reservoir. For this study, the provision of boating opportunities at Utah lakes and reservoirs is considered. Multiple data collection techniques, both quantitative and qualitative, were applied in this study. Additionally, two distinct groups of respondents participated: (1) park managers and their staff; and (2) boaters (individuals who own boats registered in Utah). Data were collected at three different spatial scales: (1) lake or reservoir level (site); regional level; and (3) state level. Multiple analytical approaches were used to ascertain both groups\u27 perspectives towards a variety of topics important to recreation management including content analysis and cluster analysis, as well as considering experience use history. The results suggest implementing a regional approach is more complicated and inclusive than providing a wide range of recreational opportunities. The organizational capacity of the managing agencies, along with their ability to cooperate with other governmental and private organizations, is also important. Also, considering larger spatial scales increases an agency\u27s options to address various challenges such as conflict, displacement, recreation succession, and homogenization and sub-optimization. As such, when prescriptive decisions about where various recreational opportunities ought to be provided, management problems and issues and agency capacity should also be considered. This dissertation also provides a model for conducting regional analyses

    Component Control System for a Vehicle

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    A vehicle includes a chassis, a modular component, and a central operating system. The modular component is supported by the chassis. The central operating system includes a component control system, a primary master controller, and a secondary master controller. The component control system is configured for controlling the modular component. The primary and secondary master controllers are in operative communication with the component control system. The primary and secondary master controllers are configured to simultaneously transmit commands to the component control system. The component control system is configured to accept commands from the secondary master controller only when a fault occurs in the primary master controller

    Multi-functional Electric Module for a Vehicle

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    A multi-functional electric module (eModule) is provided for a vehicle having a chassis, a master controller, and a drive wheel having a propulsion-braking module. The eModule includes a steering control assembly, mounting bracket, propulsion control assembly, brake controller, housing, and control arm. The steering control assembly includes a steering motor controlled by steering controllers in response to control signals from the master controller. A mounting feature of the bracket connects to the chassis. The propulsion control assembly and brake controller are in communication with the propulsion-braking module. The control arm connects to the lower portion and contains elements of a suspension system, with the control arm being connectable to the drive wheel via a wheel input/output block. The controllers are responsive to the master controller to control a respective steering, propulsion, and braking function. The steering motor may have a dual-wound stator with windings controlled via the respective steering controllers

    715-2 A Prospective, Randomized Trial Evaluating the Prophylactic Use of Balloon Pumping in High Risk Myocardial Infarction Patients: PAMI-2

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    Myocardial infarction (MI) patients with advanced age, multivessel disease or ventricular dysfunction continue to have a poor prognosis despite reperfusion therapy. Furthermore, the majority of deaths from MI occur within the first 48 hours, thus risk stratification and therapeutic interventions ideally should occur acutely. The PAMI-2 study has prospectively evaluated the hypotheses that 1) emergency catheterization with primary PTCA may allow acute risk stratification and 2) clinical outcome, ventricular function and infarct vessel patency will be improved by balloon pumping in patients identified to be high risk. MI patients who presented 0–12 hrs underwent emergency catheterization and PTCA and were stratified as high risk if one of the following was present: age>70 yrs, vein graft occlusion, 3 vessel disease, ejection fraction <45%, suboptimal PTCA result or if malignant arrhythmias persisted post PTCA. High risk patients were randomized to receive or not receive an intra aortic balloon pump (IABP) for 48 hrs. Catheterization was repeated at day 7 to determine infarct vessel patency and improvement in ventricular function. At 6 weeks a rest and exercise radionuclide ventriculogram was performed. To date, 320 patients have been enrolled, 175 of which have complete data available for analysis. The reasons for high risk status include: advanced age 38%, poor LV function 55%, 3 vessel disease 37%, vein graft occlusion 6%, suboptimal PTCA 9%, and arrhythmias 5%. Despite the high risk status, in-hospital outcomes have been favorable: death 2.9%, recurrent MI 5.8%, stroke 1.2%, angiographic reocclusion 5.8%, heart failure 19.1% and combined events 26.6%. Thus “high risk” patients treated with primary PTCA±balloon pumping appear to have a good prognosis. Whether the improved outcome is due to balloon pump support or simply due to aggressive mechanical revascularization will be determined in the entire cohort by March 1995

    Race, healthcare access and physician trust among prostate cancer patients

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    To study the effect of healthcare access and other characteristics on physician trust among black and white prostate cancer patients

    Perceived family history risk and symptomatic diagnosis of prostate cancer: The North Carolina Prostate Cancer Outcomes study

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    BACKGROUND. Prostate cancer (PrCA) is the most common cancer and the second leading cause of cancer death among US men. African American (AA) men remain at significantly greater risk of PrCA diagnosis and mortality than other men. Many factors contribute to the experienced disparities. METHODS. Guided by the Health Belief Model, the authors surveyed a population of AA and Caucasian men newly diagnosed with PrCA to describe racial differences in perceived risk of PrCA and to examine whether 1) perceived high risk predicts greater personal responsibility for prostate care; and 2) greater personal responsibility for prostate care predicts earlier, presymptomatic diagnosis. Multivariate general linear modeling was performed. RESULTS. The authors found that men with a PrCA family history appreciated their increased risk, but AA men with a family history were less likely to appreciate their increased risk. Nevertheless, neither reporting a PrCA family history nor perceived increased risk significantly predicted screening and preventive behaviors. Furthermore, higher physician trust predicted increased likelihood to have regular prostate exams and screening, indicating that the racial differences in seeking prostate care may be mediated through physician trust. Expressed personal responsibility for screening and more frequent preventive behaviors were associated with more frequent screening diagnoses, fewer symptomatic diagnoses, and less frequent advanced cancers. CONCLUSIONS. Together, these results indicate that appreciating greater risk for PrCA is not sufficient to ensure that men will intend, or be able, to act. Increased trust in physicians may be a useful, central marker that efforts to reduce disparities in access to medical care are succeeding

    Processing speed and memory test performance are associated with different brain region volumes in Veterans and others with progressive multiple sclerosis

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    BackgroundCognitive dysfunction and brain atrophy are both common in progressive multiple sclerosis (MS) but are seldom examined comprehensively in clinical trials. Antioxidant treatment may affect the neurodegeneration characteristic of progressive MS and slow its symptomatic and radiographic correlates.ObjectivesThis study aims to evaluate cross-sectional associations between cognitive battery components of the Brief International Cognitive Assessment for Multiple Sclerosis with whole and segmented brain volumes and to determine if associations differ between secondary progressive (SPMS) and primary progressive (PPMS) MS subtypes.DesignThe study was based on a baseline analysis from a multi-site randomized controlled trial of the antioxidant lipoic acid in veterans and other people with progressive MS (NCT03161028).MethodsCognitive batteries were conducted by trained research personnel. MRIs were processed at a central processing site for maximum harmonization. Semi-partial Pearson's adjustments evaluated associations between cognitive tests and MRI volumes. Regression analyses evaluated differences in association patterns between SPMS and PPMS cohorts.ResultsOf the 114 participants, 70% had SPMS. Veterans with MS made up 26% (n = 30) of the total sample and 73% had SPMS. Participants had a mean age of 59.2 and sd 8.5 years, and 54% of them were women, had a disease duration of 22.4 (sd 11.3) years, and had a median Expanded Disability Status Scale of 6.0 (with an interquartile range of 4.0–6.0, moderate disability). The Symbol Digit Modalities Test (processing speed) correlated with whole brain volume (R = 0.29, p = 0.01) and total white matter volume (R = 0.33, p < 0.01). Both the California Verbal Learning Test (verbal memory) and Brief Visuospatial Memory Test-Revised (visual memory) correlated with mean cortical thickness (R = 0.27, p = 0.02 and R = 0.35, p < 0.01, respectively). Correlation patterns were similar in subgroup analyses.ConclusionBrain volumes showed differing patterns of correlation across cognitive tasks in progressive MS. Similar results between SPMS and PPMS cohorts suggest combining progressive MS subtypes in studies involving cognition and brain atrophy in these populations. Longitudinal assessment will determine the therapeutic effects of lipoic acid on cognitive tasks, brain atrophy, and their associations
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