Nondestructive evaluation of advanced ceramics

A review is presented of Lewis Research Center efforts to develop nondestructive evaluation techniques for characterizing advanced ceramic materials. Various approaches involved the use of analytical ultrasonics to characterize monolythic ceramic microstructures, acousto-ultrasonics for characterizing ceramic matrix composites, damage monitoring in impact specimens by microfocus X-ray radiography and scanning ultrasonics, and high resolution computed X-ray tomography to identify structural features in fiber reinforced ceramics

Stimulus generalization in relation to stress and defense

Thesis (Ph.D.)--Boston UniversityThe purpose of this experiment was to investigate the relationship between stimulus generalization ani the variables of stress and defense style. Accordingly, performance on an auditory stimulus generalization task under no stress and stress conditions was studied among a group of college students. Half of the group was composed of subjects who were classified as repressors while the other half consisted of subjects classified as intellectualizers. Predictions were generated from research related to a) the relationship between stress induced by a noxious stimulus and performance on stimulus generalization tasks and b) the effectiveness of defense styles in the management of anxiety aroused by a stressful situation

Platte River Evapotranspiration: A Historical Perspective in Central Nebraska

A computational model was developed to estimate evapotranspiration (ET) in the Platte River ecosystem of central Nebraska. Data used in the model were mostly derived from the literature, although leaftemperature data were collected to estimate species transpirationcoefficients. Preliminary estimates for ET are 35.5 in per yr during the April-tooctober growing season. Riparian forest accounted for 30% of the total ET, followed in order of importance by open-water evaporation, forested islands, herbaceous riparian-transpiration, sandbar evaporation, and then hcrbaceous island-vegetation, which accounted for only 10% of the total ET. The Platte River has changed markedly during the last 40 years, with reduced flows and narrowed channel-width. Much riparian forest has grown up in that time and vegetated islands occupy a greater percentage of the remaining channel than previously. A comparison of ET rates between the 1930s and 1970s was attempted, using the computational model developed. Total ET rates in the 1930s were about the same as today (37.3 in per yr) but proportion by habitat differed greatly, with open-water evaporation probably accounting for about one-half the total ET then. The total loss due to evapotranspiration between Kingsley Dam and Duncan, Nebraska, from Platte River ecosystems (except for wet-meadow and cropland) was estimated to be 379,000 acre-feet per year

Half A Photograph

Picture of Kay Starrhttps://scholarsjunction.msstate.edu/cht-sheet-music/12563/thumbnail.jp

Somebody : Song One-Step

https://digitalcommons.library.umaine.edu/mmb-vp/2479/thumbnail.jp

Relationships Among Dimensions of Information System Success and Benefits of Cloud

Despite the many benefits offered by cloud computing’s design architecture, there are many fundamental performance challenges for IT managers to manage cloud infrastructures to meet business expectations effectively. Grounded in the information systems success model, the purpose of this quantitative correlational study was to evaluate the relationships among the perception of information quality, perception of system quality, perception of service quality, perception of system use, perception of user satisfaction, and net benefits of cloud computing services. The participants (n = 137) were IT cloud services managers in the United States, who completed the DeLone and McLean ISS authors’ validated survey instrument. The multiple regression finding were signification, F(5, 131) = 85.16, p \u3c .001, R2 = 0.76. In the final model, perception of information quality (β = .188, t = 2.844, p \u3c .05), perception of service quality (β = .178, t = 2.102, p \u3c .05), and perception of user satisfaction (β = .379, t = 5.024, p \u3c .001) were statistically significant; perception of system quality and perception of system use were not statistically significant. A recommendation is for IT managers to implement comprehensive customer evaluation of the cloud service(s) to meet customer expectations and afford satisfaction. The implications for positive social change include decision-makers in healthcare, human services, social services, and other critical service organizations better understand the vital predictors of attitude toward system use and user satisfaction of customer-facing cloud-based applications