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 20 of 37 for “"performance variability"”.
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Characterizing shale gas and tight oil drilling and production performance variability
… potential. One key challenge is understanding variability in individual well performance-in terms of both drilling time (a key driver of well cost) and well productivity-which has led to greater than anticipated economic risk associated with shale gas and tight oil development. Thus far, more …
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Analysis Methods to Control Performance Variability and Costs in Turbine Engine Manufacturing
… are able to consistently achieve high levels of performance reliability in newly manufactured engines. Much of the variation in performance reliability is due to the combined effect of tolerances of key engine components, including tip clearances of rotating components and flow areas in turbine …
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Technology Agnostic Analysis and Design for Improved Performance, Variability, and Reliability in Thin Film Photovoltaics
… affecting panel yield, and predictive models of performance reliability are needed. This has proved to be especially challenging for TFPV for two reasons in particular. First, TFPV technologies encompass a wide variety of materials, processes, and structures, which fragments the research effort. …
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Biomechanical measures of lower limb variability, and prediction of non-contact knee injuries risk factors in male athletes
… recent studies have suggested that movement variability should be considered a potential source of information for analysis in monitoring athletes’ biomechanical performance. The aims of this thesis are to assess the performance and performance-variability of frontal plane projection angle …
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Globally Synchronized Frames for guaranteed Quality-of-Service in shared memory systems
… on multicore platforms results in greater performance variability of individual threads than traditionally seen with time-multiplexed threads on single-core platforms. This performance variability makes it hard to provide performance guarantees, degrades parallel program performance, and …
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Design of a micro-interdigitated electrode for impedance measurement performance in a biochemical assay
The performance of interdigitated electrodes for impedance measurements is dependent upon the geometric design of the electrode pattern and can be significantly impacted by manufactured variability or defects. For processes which rely on precise electrode performance, such as the biochemical assay …
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Probabilistic analysis of meanline compressor rotor performance
This thesis addresses variability in aerodynamic performance of a compressor rotor due to geometric variation. The performance of the rotor is computed using a meanline model that includes the effect of tip clearance blockage, calculated by assuming the tip leakage behaves like a wake in a pressure …
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Impact of geometric variability on compressor repeating-stage performance
The impact of geometric variability on compressor performance is investigated using a compressor repeating-stage model based on well-known correlations for profile losses, endwall blockage, deviation, and the onset of stall. Previous computations with a quasi-two dimensional cascade analysis code …
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The nature and functional significance of intra-individual neurocognitive ability across serious mental illness diagnoses
Intra-individual performance variability (IIV) is defined as lawful, transient, within-person changes in cognitive performance. IIV has been found to predict functional and other crucial real-world outcomes among clinical populations with characteristic frontal lobe abnormalities. However, little …
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Understanding variability in performance of type il cements: insights from Raman imaging
… of PLC across North America, significant performance variability has been reported in the field, including reductions in 28-day strength, increased water demand, and inconsistent set behavior. The origins of this performance variability remain insufficiently understood because commercial …
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Exploring producer perceptions for cattle price and animal performance in the stocker industry
… our understanding of how cattle price and animal performance variability is viewed and approached by stocker cattle producers in the United States. Another part of this research focuses on what characteristics may be drivers of whether producers choose to practice different risk management …
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Explorations in clinical teaching technology: "Epistemic games" with academically subnormal adolescents operating as salesman of knowledge
… to that of normale. The high intra-personal performance variability depresses the average level of performance and this variability is assumed to arise from the operation of underlying disabilities. In addition, within-subject variability has implications for the understanding, diagnosing, …
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A Holistic Approach to Lowering Latency in Geo-distributed Web Applications
… actions.</p> <p>Improving the user-perceived performance of web applications is challenging, given their complex operating environments involving user-facing web servers, content distribution network (CDN) servers, multi-tiered application servers, and storage servers. Further, the application …
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Quantifying Uncertainty in Model Evaluation
… proposal will pose that simple point estimate performance indicators are ill suited to describe models that exhibit inherent variability. Addressing classifier performance variability is an uncomfortable truth that often complicates model evaluation and comparison, which makes it a convenient …
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Variability in bimanual coordination across the continuum of handedness.
… yet to be achieved. Previous research suggests performance variability depends on the phase demands of the coordinated task and completing bimanual tasks may result in less variability than unimanual tasks, or a bimanual advantage. Also, handedness and musical/athletic experience have also been …
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User-centric cloud application management
… from the Cloud Providers (CP). Cloud application performance variability and IaaS pricing diversity amongst the CPs are seen as the main reasons for cloud users’ perplexity with selection of a VM type. Although cloud researchers have proposed various effective VM selection algorithms to support …
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Modeling regulatory impacts on medical device supply chains
… determines how product attributes contribute to performance variability. By taking a proactive approach to assess the impacts of regulatory changes, firms can optimize supply chain flows to reduce cost, lead-time, and service level risks.
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Do somatosensory oscillations relate to tactile attention? Extracting the phase of transcranial Alternating Current Stimulation (tACS) during stimulus presentation.
… Results indicated that during alpha stimulation, performance in an endogenous tactile attention was mediated by the phase of the tACS signal, with a distribution of reaction times (RTs) that approximately followed the pattern of the waveform signal. The phase of the tACS signal during beta …
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Optimizing The Global Performance Of Build-to-order Supply Chains
… design that simultaneously considers multiple performance measures at three stages of a BOSC – Tier I suppliers, the focal manufacturing company and Tier I customers (product delivery couriers). We present a heuristic solution approach that constructs the best BOSC configuration through the …
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Variability of substrate utilization during exercise relative to VO2vt and VO2max
… Erika M., M.S., May 2007 Health and Human Performance Variability of substrate utilization during exercise relative to VO2vt and VO2max Chairperson: Steven E. Gaskill PURPOSE: The purpose of this study was to determine to the stability of ventilatory threshold (VT) as a set point for …
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