Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 78 for “"long-term studies"”.
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Rangeland condition in the Ceres Karoo: the importance of long-term studies
… stock industry on Succulent Karoo vegetation has long been acknowledged, and there is a need for researchers and managers to better understand the dynamics and processes leading to vegetation degradation and recovery. Despite the fact that these arid systems tend to hold high demographic inertia, …
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Vegetation Community Changes in Two National Forests in the Pineywoods, East Texas
… succession, little research has been directed to long-term studies. The fundamental properties of succession remain unclear and further research into terrestrial vegetation and an accounting of drivers in specific ecosystem types is required. This study addresses change in plant communities from …
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Time Series Analysis of Fine Particulates Matter (PM2.5) in Chaoyang District of Beijing
… becoming hard to ignore, however, there are no long-term studies examining the particle pollution such as PM 2.5 concentration. This study describes current and predicts future PM 2.5 pollution for a three-year period, 1st January 2010 to 31st December 2012, from the U.S. Embassy monitoring site …
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Friend Me Your Ears: A Musical Approach to Human-Robot Relationships
… rarely extended beyond a single session. These studies are insufficient for examining multi-interaction scenarios, which will become commonplace if the robot is situated in a workplace or adopts a role that is part of a human’s routine. Long term studies that have been executed often demonstrate …
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Extended mechanical stimulations of cartilage for growth and repair
… of dynamic sinusoidal compression results in long term extracelluar matrix macromolecule biosynthesis and increased biosynthetic rates in the cartilage system. The protocol uses total glycosaminoglycan and DNA content assays to measure matrix macromolecule biosynthesis and uses L-³H-proline …
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Short and long term performance of Canadian TSE-listed acquirers
… this study empirically tests short- and long-term security price performance of Canadian TSE-listed acquirers. The cumulative abnormal return (CAR) and the buy-and-hold abnormal return (BHAR) methods were use for the short- and the long-term studies respectively. In the short-run study, …
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Parallelization of ECG template-based abnormality detection
… to develop techniques to predict cardiac arrest, long-term study of electrocardiogram (ECG) data needs to be done to detect changes in electrical activity of diseased hearts. In the past, limitations of computing power and storage space restricted the duration of long-term studies to several days. …
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Provincial Cannabis Legislation, Regulation, and Licensing: Its Effectiveness and Impacts on Municipalities in Ontario
… cannabis in Ontario and to contribute to other long-term studies with respect to this matter. Through case studies of the Town of Tecumseh and the Municipality of Lakeshore, it focuses on dissecting the role of municipal governments in the Canadian example of cannabis legalization and …
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Vertebrate Survey of Rocky Fork Wildlife Management Area, Unicoi and Greene Counties, Tennessee.
… This research may provide the foundation for long-term studies of the effects of fragmentation within forests of the Southern Appalachians.</p> <p>A total of 50 visits were made between April 1998 and July 2000. Documentation of 109 species of vertebrates was established, representing 4 …
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Walk to Jerusalem: Facilitating physical activity in a faith community
… mixed results from faith-based physical activity studies, and few have been conducted with Caucasian populations. The present study used the Walk to Jerusalem program as a motivational tool within a Caucasian faith-based setting. The objectives were to increase physical activity, decrease blood …
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Long-term changes in forest soils of Maine and Illinois
… genesis and weathering experiments are short-term and focus on addressing primarily climate, relief, parent material, or organism as a single factor. Long-term soil genesis experiments are rare and are designed to evaluate the factor of time. There is a need to apply experimental designs of …
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The effect of testosterone on factors associated with diabetes, atherosclerosis and obesity.
… a major global health problem. Epidemiologic studies indicate that obesity is an important risk factor for type 2 diabetes (T2DM), atherosclerosis and low testosterone in men. Importantly, testosterone replacement treatment (TRT) can improve the condition of these diseases. According to human …
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Radiofrequency ablation versus cryoablation in the treatment of atrioventricular nodal reentrant tachycardia
… levels of success in treating AVNRT. To date, studies on the two modalities have compared metrics such as acute success rate, procedure time, fluoroscopy time, and recurrence of AVNRT. Recurrence of AVNRT has been observed as far as 10 years after RF ablation. In patients with a history of RF …
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Dieta de baixo carboidrato: uma revisão de literatura
… is restricted in carbohydrates, several studies relating diet such as beneficial to the improvement of the metabolic syndrome markers, but results also indicate that there are important effects of carbohydrate restriction, which deserve further investigation. Thus, the aim of this study …
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Chinese Tallow Long-Term Impact on Stand Dynamics in a Bottomland Hardwood Forest Following Vegetation Management
… and shade tolerant than most native trees. The long-term effectiveness of Chinese tallow control is an important topic to research as only a few long-term studies of Chinese tallow control have been conducted. A 10-year re-measurement of 22 paired plots installed in 2012 on the Pineywoods …
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Efficacy of Temporary Fixed Retention Following Comprehensive Orthodontic Treatment
… was to evaluate posttreatment relapse at long-term recall (> 10 years) in cases (A) treated with temporary fixed mandibular retention plus Hawley retainers compared to (B) a similar group retained with just removable retention (standard Hawley type retainers alone). Fixed retainers were …
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Soil Microbial Community Response to Human Decomposition in Michigan's Upper Peninsula
… field grows, incorporating soil chemistry and long-term studies will be essential for improving understanding of soil microbial community responses to human decomposition.</p>
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Development of a collagen gel sandwich hepatocyte bioreactor for detecting hepatotoxicity of drugs and chemicals
… in collagen sandwiches, there are very few studies evaluating this system for investigating hepatotoxicity. We cultured primary rat hepatocytes in the collagen sandwich configuration and our goal was to optimize this system for long-term studies and to examine toxicity of a variety of …
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Characterization of tropospheric scintillations on Earth-space paths in the Ku and Ka frequency bands using the results from the Virginia Tech OLYMPUS experiment
… interest in the use of Very Small Aperture Terminals (VSATs) in satellite communication links operating in the Ku and Ka bands. Such systems offers the advantage of low signal margins and therefore, low cost. For the same reason, however, VSATs links can be strongly impaired by tropospheric …
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Non-genomic control of neuronal calcium signaling by the steroid hormone estrogen leads to neuroprotective effects
… and large sample randomized placebo controlled long-term studies, revealed hormone replacement therapy may have little, none, or detrimental effects on brain health. These studies found differences in health benefits versus risks amongst women who received hormone replacement therapy, depending …
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