1,641 research outputs found

    Recommendations for Sustainable Tourism in Patagonia: An Exploratory Analysis of Sustainable Tourism in Costa Rica, the Nordic Region, and Thailand’s Communities

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    This thesis explores different levels of governance and its role towards actualizing sustainable tourism in Patagonia. With the growing threat of climate change, international destinations such as Patagonia are looking to continue building their tourism industries in a sustainable way. Through analyzing case studies of national governance in Costa Rica, multi-national governance in the Nordic region, and community-based tourism in Thailand, we can better understand how each form of governance has the potential to create a sustainable tourism industry. With this understanding of successful governance in my case studies, as well as understanding the historical and political forces that have shaped Patagonia, this thesis will make recommendations for how Patagonia can further enact sustainable tourism. These three forms of governance mentioned are lacking in Patagonia with respect to sustainable tourism. National governance is lacking in both Chile and Argentina to make the necessary changes to mitigate climate change and facilitate sustainable tourism. A multinational approach has largely been absent where there are opportunities for Chile and Argentina to collaborate on environmental issues, particularly in Patagonia. The community-based approach could be further developed in small towns in Patagonia. Each level of governance is explored and shown to benefit Patagonia’s tourism industry and approach to climate change

    Independent Orbiter Assessment (IOA): Analysis of the DPS subsystem

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    The results of the Independent Orbiter Assessment (IOA) of the Failure Modes and Effects Analysis/Critical Items List (FMEA/CIL) is presented. The IOA approach features a top-down analysis of the hardware to independently determine failure modes, criticality, and potential critical items. The independent analysis results corresponding to the Orbiter Data Processing System (DPS) hardware are documented. The DPS hardware is required for performing critical functions of data acquisition, data manipulation, data display, and data transfer throughout the Orbiter. Specifically, the DPS hardware consists of the following components: Multiplexer/Demultiplexer (MDM); General Purpose Computer (GPC); Multifunction CRT Display System (MCDS); Data Buses and Data Bus Couplers (DBC); Data Bus Isolation Amplifiers (DBIA); Mass Memory Unit (MMU); and Engine Interface Unit (EIU). The IOA analysis process utilized available DPS hardware drawings and schematics for defining hardware assemblies, components, and hardware items. Each level of hardware was evaluated and analyzed for possible failure modes and effects. Criticality was assigned based upon the severity of the effect for each failure mode. Due to the extensive redundancy built into the DPS the number of critical items are few. Those identified resulted from premature operation and erroneous output of the GPCs

    Independent Orbiter Assessment (IOA): Analysis of the orbiter main propulsion system

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    The results of the Independent Orbiter Assessment (IOA) of the Failure Modes and Effects Analysis (FMEA) and Critical Items List (CIL) are presented. The IOA approach features a top-down analysis of the hardware to determine failure modes, criticality, and potential critical items (PCIs). To preserve independence, this analysis was accomplished without reliance upon the results contained within the NASA FMEA/CIL documentation. The independent analysis results for the Orbiter Main Propulsion System (MPS) hardware are documented. The Orbiter MPS consists of two subsystems: the Propellant Management Subsystem (PMS) and the Helium Subsystem. The PMS is a system of manifolds, distribution lines and valves by which the liquid propellants pass from the External Tank (ET) to the Space Shuttle Main Engines (SSMEs) and gaseous propellants pass from the SSMEs to the ET. The Helium Subsystem consists of a series of helium supply tanks and their associated regulators, check valves, distribution lines, and control valves. The Helium Subsystem supplies helium that is used within the SSMEs for inflight purges and provides pressure for actuation of SSME valves during emergency pneumatic shutdowns. The balance of the helium is used to provide pressure to operate the pneumatically actuated valves within the PMS. Each component was evaluated and analyzed for possible failure modes and effects. Criticalities were assigned based on the worst possible effect of each failure mode. Of the 690 failure modes analyzed, 349 were determined to be PCIs

    MicroRNAs as Novel Biomarkers for Breast Cancer

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    Breast cancer is a complex phenotypically diverse genetic disease, involving a variety of changes in gene expression and structure. Recent advances in molecular profiling technology have made great progress in unravelling the molecular taxonomy of breast cancer, which has shed new light on the aetiology of the disease and also heralded great potential for the development of novel biomarkers and therapeutic targets. Mi(cro)RNAs are a contemporary class of small noncoding endogenous RNA molecules, generating great excitement in the clinical and scientific communities. The recent discovery that miRNA expression is frequently dysregulated in cancer has uncovered an entirely new repertoire of molecular factors upstream of gene expression, which warrants extensive investigation to further elucidate their precise role in malignancy. We present a comprehensive and timely review of the role of miRNAs in cancer: addressing miRNA function, their putative role as oncogenes or tumor suppressors, with a particular emphasis on breast cancer throughout. We discuss the recent discovery of quantifiable circulating cancer-associated miRNAs, which heralds immense potential for their use as novel minimally invasive biomarkers for breast and other cancers. Finally, we comment on the potential role of miRNAs in breast cancer management, particularly in improving current prognostic tools and achieving the goal of individualized cancer treatment

    Resin adjustment of three-dimensional printed thermoset occlusal splints: Bonding properties - Short communication

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    Objectives: To evaluate the interfacial adhesion of an autopolymerizing acrylic resin to 3D printed thermoset occlusal splints compared to thermoplastic occlusal splints.Materials and methods: Cylinders made of an autopolymerizing acrylic resin were adhered to 3D printed thermoset and also to thermoplastic plates. A different surface treatment and three storage conditions were used: dry, 7 days water-storage and 14 days water-storage. Bond strength test (so-called shear-bond strength test) was afterward performed.Results: ANOVA (R2 = 0.764) revealed significant differences in bond strength according to material (p Conclusions: The bond strength of autopolymerizing acrylic resin to 3D printed thermoset plates is higher when compared to thermoplastic plates. Bonding between acrylic resin and 3D printed splints was high enough for clinical applications.conclusion</div

    Persistent Penumbra in a Rabbit Stroke Model: Incidence and Histologic Characteristics

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    Duration and extent of penumbra determine the window and brain volume in which interventions may save injured tissue after stroke. Understanding the penumbra in animals is necessary in order to design models that translate to effective clinical therapies. New Zealand white rabbits were embolized with aged autologous clot (n = 23) or insoluble microspheres (n = 21). To examine effects of treatment on penumbra, sphere-stroked animals were treated with 3 μm microbubbles plus ultrasound (n = 19). Rabbits were euthanized at 4 or 24 hr. Infarct volume was measured following triphenyltetrazolium chloride (TTC) staining of brain sections. Penumbra was visualized using immunostaining of pimonidazole injected fifteen minutes prior to euthanasia. Potentially reversible penumbra was present in 14.3% stroked rabbits at 4 hours and 15.7% at 24 hours after embolic stroke and represented up to 35% of total lost tissue. Intervention at up to 24 hours may benefit a significant patient population

    Outcomes Associated with a Home Care Telehealth Intervention

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    To determine whether adding telehealth technology to traditional home care services increases health-related quality of life (HRQOL) and home care satisfaction, and decreases resource utilization among home care patients. This trial included 37 home care patients receiving services in a Veterans Affairs medical center, randomized into intervention and control groups. Outcome measures included patient satisfaction and HRQOL at baseline and 6-month follow- up, and the use of inpatient and outpatient services before and during the 6-month study period. Intervention group patients reported greater improvement in the mental health component of HRQOL, (t = 2.27; df = 15; p = 0.04). Satisfaction with the telehealth equipment was high (means exceeded 4.0 on six measures ranging from 1–5). However, no statistically significant differences were observed between intervention and control groups in terms of changes in physical health, inpatient admissions, bed days of care, emergency department visits, or general satisfaction with home care services. Intervention group members did show a trend (p = 0.10) toward fewer overall outpatient visits (mean = 29.1; standard deviation [SD] ± 30.1) compared to those receiving traditional home care services (mean = 38.9; SD ± 28.9) The use of telehealth services as an adjunct to traditional home care is associated with greater improvements in mental health status and a trend toward lower use of inpatient and outpatient healthcare services. Further work, utilizing larger sample sizes, is needed to investigate the relationship between telehealth services, the use of healthcare resources, and other outcomes.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/63227/1/tmj.2006.12.297.pd

    Generalized and specific anxiety in adolescents following heart transplant

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    Mental health concerns are associated with worse outcomes after adult heart transplant. Illness‐specific anxiety is associated with worsened psychological well‐being after other solid organ transplants but has never been characterized after pediatric heart transplant. This single‐center cross‐sectional study aimed to evaluate illness‐specific and generalized anxiety after heart transplantation in adolescents. A novel 12‐item PHTF, GAD‐7, and the PedsQL were administered. Univariate associations of demographics, clinical features, and medication adherence as measured by immunosuppression standard deviation with the PHTF and GAD‐7 scores were evaluated. Internal consistency and validity of the PHTF were examined. In total, 30 patients participated. The most common illness‐specific fears were retransplantation, rejection, and more generally post‐transplant complications. The PHTF had good internal consistency (Cronbach α = .88). Construct validity was demonstrated between PHTF and GAD‐7 (r = .62) and PedsQL (r = −.54 to −.62). 23% endorsed moderate to severe generalized anxiety symptoms. More severe symptoms were associated with older age at survey (P = .03), older age at listing (P = .01) and having post‐transplant complications (P = .004). Patients with moderate or severe symptoms were more likely to report late immunosuppression doses (P = .004). Illness‐specific and generalized anxiety may be prevalent after pediatric heart transplant. Screening for anxiety in adolescents post‐transplant may identify those at risk for adverse outcomes including non‐adherence. The PHTF is a brief, valid, and reliable instrument identifying illness‐specific anxiety in this population.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/153669/1/petr13647.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/153669/2/petr13647_am.pd

    The Artist as Philanthropist: Strengthening the Next Generation of Artist-Endowed Foundations, Study Report Supplement 2013

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    This new publication presents updated findings of the Aspen Institute National Study of Artist-Endowed Foundations, reflecting the field's continued growth since release of the Study's initial findings based on 2005 data. Drawing on new data through 2010, Study Report Supplement 2013 details this growth, analyzes factors shaping it, and explores ramifications for foundation practice. Appendices list identified foundations and present data profiles of those reporting assets of at least $1 million. New briefing papers address rising topics that will influence the field's development and a descriptive survey summarizes estate planning literature as it pertains to visual artists

    Decreased Serum Levels of S-100B Protein Reflect Successful Treatment Effects in a Rabbit Model of Acute Ischemic Stroke

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    Serum levels of S-100B were investigated as a marker for infarct volume and response to treatment following acute ischemic stroke in rabbits. Following subselective angiography, rabbits (n=31) were embolized by injection of a 3-day-old blood clot (0.6x4.0-mm) into the internal carotid artery. Treatment began 1-hr post-embolization, groups included: Control (n=8, embolization only), tissue plasminogen activator (tPA, n=12, 0.9mg/kg), and perflutren lipid microbubbles with transcranial ultrasound (MB+US, n=11, MB at 0.16mg/kg, US at 1-MHz pulsed-wave, 0.8 W/cm2 for 1-hr). Serum S-100B levels were significantly increased (P<0.01) 24-hours following embolization in control (3.1-fold over baseline) and tPA (2.9-fold) groups, while treatment with MB+US resulted in an attenuated, non-significant (P=0.221) increase (1.6-fold). Twenty-four hour infarct volumes averaged 4.76%±1.16% for controls, 2.25%±0.95% for rabbits treated with tPA (P=0.32 vs. control), and 0.79%±0.99% for rabbits treated with MB+US (P=0.04 vs. control). Twenty-four hour concentrations of S-100B were positively correlated with infarct volume (r=0.59, P=0.0004)
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