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.
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Showing 1 to 17 of 17 for “"Aging studies"”.
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Atomically thin molybdenum disulfide prepared via chemical vapor deposition and mechanical exfoliation: aging studies and reliability testing
… (CVD) and mechanical exfoliation methods, the aging studies, and the electrical performance of the synthesized MoS₂ flakes and MoS₂ devices, respectively. The study is divided into two parts. In the first part, we aimed to modify an existing CVD furnace in the lab to produce large-area, …
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Photoinduced Optical Integrated Circuits and Bulk Photonic Devices in Chalcogenide Glasses
… of operation are defined, and accelerated aging studies are used to predict device lifetimes.
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A Program Evaluation of the Seniors Who Paint Program
Aging research suggests that community-based art programs may serve as more practical interventions to improve the quality of life and cognition in older adults than more traditional or pharmacological interventions. Despite promising results, most studies investigating the impact of participatory …
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Effects of Stress, Sex Differences, and Cognitive Reserve on Cognitive Decline in Healthy Elderly Subjects
… slowing cognitive decline and promoting healthy aging. Studies have indicated that an increase in activities that promote cognitive reserve can be beneficial in attenuating cognitive decline in the face of various injuries. Various studies have also demonstrated that sex is correlated with …
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Investigating the Use of Fallout Radionuclides Beryllium-7 and Excess Lead-210 as Short-Term Stream Sediment Chronometers in the Agricultural Upper Midwest, USA
… the first chapter it was clear that the sediment aging technique I used is heavily influenced by the variation in radionuclide deposition by precipitation. Depositional fluxes and concentrations of beryllium-7 and excess lead-210 in rain and snow are assumed to be reasonably well-correlated in …
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Spinal Muscular Atrophy: Evidence of a Multi-System Disease
… reproduces canonical features of SMA, permitting aging studies. This model presents with a prominent myopathic phenotype prior to motor neuron death, without extra-neuronal involvement during the course of its lifespan. Overall, our work shows multiple potentially clinically relevant defects in …
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Enhancement of Platinum Cathode Catalysis by Addition of Transition Metals
… and electroactivity. However, in accelerated aging studies, Pt3Co/Mo showed a superior improved long-term stability over 10,000 potential cycles in acidic solution over the other catalysts studied. This enhancement of Pt3Co/Mo was attributed as both enhanced catalytic stability and electrode …
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Aging well: Shaping age identities in the literature of the British welfare state
… old age—that seek to manage the “problem” of an aging population, while likewise sharing with the broader field of aging studies the goal of disassociating old age from damaging equations with decline and loss. Beginning with the postwar decades and extending to early twenty-first century texts, …
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Quantitative Characterization of Nanovoids in Quenched Aluminum Using Small Angle X-ray Scattering Studies
… between void and metal matrix. Previous SAXS studies of nanovoid structures in metals were limited by the presence of multiple scattering from the metal matrix. The first published report of nanovoid characterization in quenched Al using the SAXS method took place in 2008. In the present work, …
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Aging Changes Cell Mechanics and Dynamics with a Backbone of Cytoplasmic Crowding
Aging is a biological process that is correlated with life-altering and terminal diseases, and while the population of the elderly increases every year, the mechanism behind aging and its physical changes is not fully understood. Many aging studies traditionally focus on molecular-level changes, …
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Mechanisms of discharge product evolution and solvent stability in lithium-oxygen batteries
… also illustrated the importance of performing aging studies in the discharged condition to determine the stability of Li-O₂ battery components. Adding small amounts of water to Li-O₂ solvents has been demonstrated to enhance capacity but the effect on stability was not well understood. …
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Hydrogen embrittlement of Aluminum-Lithium alloys
… 2219 alloy. Prior to mechanical testing, aging studies were performed for 2090 and 2219 using microhardness Vickers to determine the peak aged condition required by NASA. The Charpy tests are part of this study designed to investigate the effects of temperature and notch orientation on …
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The Neural Correlates of the Age-Related Decrements in Selective Attention That Occur in Healthy Cognitive Aging: an FMRI Study of the Stroop Task
… that cognitive changes associated with healthy aging occur much earlier than previously believed. Yet, the vast majority of healthy cognitive aging studies neglect to analyze the gradual neural and behavioural age-related changes that surreptitiously begin in mid-adulthood and continue into …
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Synthesis of Cadmium Selenide Quantum Dots and Their Cytotoxicity
… applications in biomedical, biochemistry, bioimaging areas through different methods such as cell labelling and drug delivery (Chapter1). This study aims to test the optical and biological properties of CdSe NPs so that its applications can be improved in these areas in the future. Three types …
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The Influence of Nonadsorbed Polymer on the Behavior of Weakly Flocculated Suspensions
… as determined by adsorption isotherm studies. The adlayer thickness ($\delta$) was assumed to be equivalent to the hydrodynamic radius ($\approx$11.6 nm) of the PMMA coils. In the absence of excess PMMA, suspensions exhibited strong shear thinning and low shear relative viscosities …
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Properties and Performance of Polymeric Materials Used in Fuel Cell Applications
… and the bipolar plates), there have been few studies of more "minor" components—namely, the performance and durability of seals, sealants, and adhesives, which are also exposed to harsh environmental conditions. When seals degrade or fail, reactant gases leak or are mixed, it can degrade the …
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The Age of Obsolescence: Senescence and Scientific Rejuvenation in Twentieth Century America
… century when a publicly shared conception of aging was emerging in relation to advances in science and medicine, industrialized labor practices, a slowly developing welfare state, demographic observations of increased life expectancy, changing gender roles and expressions of national identity. …