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NCSU 檢索結果共 5111 筆,本頁資料從第 1 筆到第 12 筆

WINDELL, DAVID THOMAS. The Effects of Multiple Presentation Formats on Subjective Mental Workload Rating Scale Techniques in Multimedia Educational Environments. (Under the direction of Dr. Eric Wiebe and Dr. Sharolyn Lane.) Cognitive Load Theory focuses on several assessment techniques to assess overall cognitive load, including its three-subclasses, and its relationsh....

By David T Windell-Psychology-NCSU-masters-2007-01-30
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The primary objective of this research is to develop optical and opto-mechanical design procedures for reflective optical systems. Challenges in fabrication and testing have limited the choice of surfaces used in the design of reflective optical systems to rotationally symmetric surfaces. Freeform surfaces or non-rotationally symmetric surfaces are necessary to meet cha....

By Nadim George Wanna-Mechanical Engineering-NCSU-masters-2007-01-22
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A transformation of the sample coefficient of variation ($CV$) for normal data is shown to be nearly proportional to a $chi^2$ random variable. The associated density is applied to inference on the common $CV$ of $k$ populations, testing $CV$ homogeneity across populations, and confidence intervals for the ratio of two $CV$s. The resulting tests and confidence intervals....

By Joseph Guenther Boyer-Statistics-NCSU-doctoral-2007-01-19
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Human locomotion has long been considered an overly practiced motor behavior. However, recent research has revealed a demand of locomotion on attentional resources, especially when performed during multitasking. Situation Awareness (SA), a cognitive construct critical to decision making and performance in complex tasks, has been shown to be important while multitasking ....

By Mohamed Ashraf Ali Sheik Nainar-Industrial Engineering-NCSU-doctoral-2007-01-19
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Using methodology in panel unit root tests we propose a new approach to univariate unit root tests. Our method leads to an asymptotically normal distribution of the least squares estimator and is robust to contaminated data having structural changes or outliers while the power of the test does not drastically worsen. The main idea is that under the assumption that the p....

By Seong-Tae Kim-Statistics-NCSU-doctoral-2007-01-09
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Limited research is available that evaluates animal productivity from increasing levels of pasture supplementation to dairy confinementtype diets. Two 8week field studies (fall of 2004, F2004; and spring of 2005, F2005) and an in vitro continuous culture study were conducted to examine animal performance under different combinations of total mixed ration (TMR) feeding a....

By Ronaldo E Mr. Vibart-Animal Science and Poultry Science-NCSU-doctoral-2007-01-09
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This thesis is the combination of two research studies involving stormwater wetlands and wet ponds. In the first study, forebays, designed to trap total suspended solids and dissipate inflow energy to stormwater wetlands and innovative wet ponds, were examined. Current forebay design standards in North Carolina arbitrarily size the surface area of wetland forebays to be....

By Jennifer Lee Johnson-Biological and Agricultural Engineering-NCSU-masters-2007-01-08
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The most common method of surveying birds is the point count. There are two approaches to analyzing count data to produce species abundance estimates and monitor abundance changes through space and time. The first method uses count data as a direct index to bird abundance. Uncorrected index counts are currently the norm in ornithological research. The second method esti....

By Jerome P. Brewster-Zoology-NCSU-masters-2007-01-08
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ABSTRACT Woodside, Robert M. Metrology of Reflective Optical Systems. (Under the direction of Dr. Thomas A. Dow) A functioning reflective optical system requires designing, fabricating, and assembling complicated optical surfaces. However, once these surfaces have been fabricated, an accurate metrology process must be available to ensure the fabricated optical and fiduc....

By Robert M Jr Woodside-Mechanical Engineering-NCSU-masters-2007-01-03
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Visualizations enable scientists to inspect, interpret, and analyze large multi-dimensional data sets. Effective visualizations are designed to both orient and engage viewers by directing attention in response to a visual stimulus, and then encouraging a viewer's vision to linger at a given image location. Research into human visual perception provides information about....

By Laura Gray Tateosian-Computer Science-NCSU-doctoral-2007-01-03
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SATTERLUND, TRAVIS DELMAR. Fighting for an Authentic Self: An Ethnographic Study of Recreational Boxers. (Under the direction of Michael L. Schwalbe.) This study is an ethnographic examination of the rank and file recreational boxersmostly white and middle-class maleswho frequented a gym in a mid-sized southeastern city in the United States. I conducted field research a....

By Travis D. Mr. Satterlund-Sociology-NCSU-doctoral-2006-12-22
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Intrusion detection systems (IDSs) are important components of network security. However, it is well known that current IDSs generate large amount of alerts, including both true and false alerts. Other than proposing new techniques to detect intrusions without such problems, this thesis presents some work we have done in improving the study of IDS alerts by incorporatin....

By Yan Zhai-Computer Science-NCSU-doctoral-2006-12-22
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