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 35 for “"Empirical Measurements"”.
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Empirical Measurements of Massive Galaxy and Active Galaxy Evolution
Using new wide-area galaxy redshift surveys, we explore the evolutionof the most massive galaxies and the most luminous quasars in the universe over much of cosmic history. Quasars and massive red galaxies both areextremes; the most luminous high redshift quasars likely play a key role in shaping …
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Longitudinal Trends of Competitive Employment for Developmentally Disabled Adults: A Benefit-Cost Analysis
… analysis using analytical concepts and empirical measurements to determine the economic efficiency of a Competitive Employment Program for 22 developmentally disabled adults over an eight-year period. While Competitive Employment Programs have demonstrated that developmentally disabled …
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Modeling the effects of site-specific amino-acid preferences on protein evolution.
… site-level summary metrics, individual mutation measurements, and the 3-D protein structure for site(s) of interest from a deep mutational scan. \texttt{dms-view} is a flexible tool that allows the user to explore the site-specific amino-acid preferences measured by a given deep mutational …
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Combining Prior Knowledge and Data: Beyond the Bayesian Framework
… an analytic model of hardware is combined with empirical measurements of performance of optimized code to determine the maximum-a-posteriori estimates of the optimization parameters.
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Identifying and analyzing sources of overhead in the TCP/IP communication protocol over a local area network
… application program interfaces are studied. Our measurements serve as a guide in designing performance critical applications. Moreover, we present a detailed timing analysis of the dynamic behavior of the TCP/IP implementation in the MD-DOS/IP package. The analysis shows that the TCP flow control …
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Empirical Analysis of User Passwords across Online Services
… this project, we perform the first large-scale empirical analysis of password reuse and modification patterns using a ground-truth dataset of 28.8 million users and their 61.5 million passwords in 107 services over 8 years. We find that password reuse and modification is a very common behavior …
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3D tracking via body radio reflections
… which require the user to hold a transceiver. Empirical measurements with a WiTrack prototype show that, on average, it localizes the center of a human body to within a median of 10 to 13 cm in the x and y dimensions, and 21 cm in the z dimension. It also provides coarse tracking of body parts, …
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Tactile sensing of shape : biomechanics of contact investigated using imaging and modeling
… realistic model of the human fingertip based on empirical measurements of in vivo geometric and material properties of skin layers, so that the mechanical response of the fingertip skin to different shapes of objects in contact can be investigated, to help identify the relevant mechanism that …
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Modeling the coupled effects of heat transfer. thermochemistry, and kinetics during biomass torrefaction
… Research efforts to date have focused on empirical measurements of the fuel quality improvements caused by torrefaction at different temperature and residence time conditions. Additionally, these efforts have assumed that torrefaction is a kinetically limited process and do not account for …
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Corporate governance and accounting irregularities: evidence from the two-tier board structure in Indonesia
… irregularities has been tested. However, empirical measurements and tests are limited and largely based in one-tier board system environments. The outcomes are almost impossible to apply in two-tier board systems, where relationships between governance mechanisms and accounting …
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Contention Bounds for Locking Computations
… contention detection tools abound in software, empirical measurements of contention suffer from wide fluctuations across different executions of the same code due to scheduling variation and processor availability. In this work we present analytical bounds on the maximum possible contention …
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THE PION DOUBLE DIFFERENTIAL CHARGE EXCHANGE CROSS SECTION IN PROTODUNE-SP
… exchange cross section. The simulation uses empirical measurements to model these cross sections or to validate the implemented models. The final state interaction uncertainties will translate to an uncertainty on the measured neutrino count and energy. A component of reducing these …
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Interrelationships Among Elements of Formal Mentoring and the Dimensions of Organizational Socialization
… measure formal mentoring programs. As a result, empirical measurements of the effectiveness of university formal mentoring programs are limited. Researchers suggest that using organizational socialization measures may be a way to assist the formal mentoring measurement process. The overall …
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Movement and placement of non-contiguous data in distributed GPU computing
… and data placement. This work finds that empirical communication measurements can be used to automatically schedule and execute intra- and inter-node communication in a modern heterogeneous system, providing ``hand-tuned'' performance without the need for complex or error-prone …
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Earth electrode resistance diagnosis and measurements
… performance of AX-PRO wire through a series of measurements, simulations, and calculations, conducted at two distinct locations in Iceland: Hellisheiði power plant and Vatnsleysa in Biskupstunga. The research objectives include determining whether the AX-PRO wire can provide comparable earth …
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Measuring Political Corruption from Population Outcomes: An alternative to perception measures
… exceptionally difficult to directly observe and empirical measurements of corruption remain highly contested. Despite the increasing availability of corruption measures and generally high correlations between them, scholars and practitioners disagree over their applicability, interpretation, and …
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Advancing Measurement Techniques and Methods to Improve Methane Emission Estimates from Urban Natural Gas Infrastructure and Inform Mitigation
… mitigations of anthropogenic sources, which empirical measurements can help guide. Urban areas emit large quantities of CH4 in aggregate. In the U.S. and Canada, large proportions of urban CH4 emissions often originate from natural gas infrastructure, presenting a mitigation opportunity. …
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High-frequency correlation dynamics: Is the Epps effect a bias?
… of discrete connected events, or whether these measurements can still be faithfully represented as random samples of some underlying Brownian diffusion in the context of modelling correlation dynamics. In particular, if the implicit notion of instantaneous correlation dynamics that are …
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Using passive samplers to assess bioavailability, toxicity, and reactivity of hydrophobic organic chemicals (HOCs)
… of PE equilibrated with contaminated sediment. Empirical observations of accumulation in the Nereis virens polychaete were in good agreement with PE-based predictions for PCBs, but were lower by at least an order of magnitude for other classes of HOCs (such as PAHs) presumably due to metabolism. …
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Applying Mechanistic Understanding of Optical Absorption and Scattering Phenomena to Enhance the Spectroscopic Analyses of Pharmaceutical Materials
… penetration profiles, respectively. </p><p> Both empirical measurements and Monte Carlo simulation were used to explore the photon radial movements in a chemical imaging setting. It is well understood that radial photon movements among adjacent pixels leaded to blurred 2-D chemical images. A Monte …
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