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 293 for “"CRT"”.
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CRT LIGHT-HEAD FOR AN AUTOMATIC DRAFTING SYSTEM
… method of implementation of a cathode-ray tube (CRT) for use with a high quality precision automatic drafting system intended for the preparation of maps on a flatbed drafting table. A CRT light-head, mounted in place of the normal optical-mechanical light-head on a drafting table, enables the …
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CRT anti-glare treatments, image quality, and human performance
… of ambient lighting and two levels of monochrome CRT resolution were combined factorially with the filters. In addition, user measures of readability, legibility, and perceived image quality were obtained for these same filter and environmental conditions. Quantitative models were developed to …
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Electrical studies on new generations of oxide cathodes for CRT applications.
A systematic study has been made of two novel types of BaO/SrO oxide cathode with 5% and 2.5% addition of Ni powder by weight on a Ni cap containing an activating impurity. The emission and conductivity characteristics of oxide cathodes depend largely on the activation process. In this thesis the …
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Unitary suprathreshold color-difference metrics of legibility for CRT raster imagery
… well to describe or prescribe RS with multicolor CRT raster imagery for a range of character luminances in both positive and negative presentation polarities. These are the Y,u',v', logY,u',v', L*,u',v', and L*,u*,v* rescaled color spaces. Because of its predictive accuracy and simplicity, a …
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Effects of color CRT misconvergence, target size, and nontarget density on visual search performance
… decade have led to the widespread use of color CRT displays. misconvergence among the primary colors of a shadow-mask CRT is a principle human factors concern for applications of this technology. The major objectives of this research were: (1) to determine the effect of misconvergence on visual …
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Effects of color CRT misconvergence and font type on text readability and subjective preference
… society relies on the widespread use of color CRT displays. Misconvergence of the primary colors of a shadow-mask CRT is a problem with this technology that deserves human factors engineering consideration. The purpose of this research was as follows: (1) to determine the effects of …
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Effects of depth cues on depth judgements using a field-sequential stereoscopic CRT display
… has focused on the use of field-sequential CRT techniques to present binocular stereoscopic images. Although it is widely believed that stereopsis provides a potent depth information cue, numerous monocular cues exist which may augment, detract from, or even supplant stereopsis. …
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Effects of Illumination and Viewing Angle on the Modeling of Flicker Perception in CRT Displays
… as part of a new ANSI/HFES 100 standard for CRT flicker. A graph based flicker prediction method developed from Farrell, 1987 was evaluated. The Farrell model is based on phosphor persistence, screen luminance, display size, and viewing distance. The graph based method assumes a worse case …
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Effects of color CRT misconvergence and display luminance on reading performance and perceived image quality judgments
… conducted to investigate the effects of color CRT misconvergence and display luminance on reading performance and perceived image quality. The objectives of this study were (1) to determine the effects of color CRT misconvergence on reading time and errors, (2) to determine the effects of color …
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Subjective Image Quality of CRT Displays under Ambient Glare: Assessing the ISO 9241-7 Ergonomic Technical Standard
… judgments by viewing alphanumeric text on the CRT screens. Subjective scale values also were correlated with ISO classifications and two ISO metrics: screen image luminance ratio (Diffuse, 200 lux) and specular reflection image luminance ratio. The ANOVA findings indicated that specular glare …
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An analytic model to predict detection threshold and performance data for misconvergence on a shadow-mask CRT
… through the shadow mask structure on a color CRT display system. The model incorporates functions to describe the unique features of a color CRT, that is, the discrete sampling imposed by the shadow mask/ phosphor-dot arrangement as well as the electron beam phase relationships. The model also …
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Objective Image Quality of CRT Displays under Ambient Glare: Assessing the ISO 9241-7 Ergonomic Technical Standard
This thesis assessed the readability of CRT displays viewed under ambient lighting conditions and then evaluated the findings with respect to the ISO 9241-7 standard. More specifically, two phases of work were conducted in this thesis. In Phase 1, seven monitors were evaluated photometrically …
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The Effects of Stimuli Type, Size, and Articulation on Estimating the Luminance Contrast of Real and CRT Targets
… from a spotlight, to paper, and finally to a CRT monitor. Lightness constancy was also expected to increase with articulation, and to vary as stimuli sized increased or decreased. Two separate experiments were conducted with a total of 80 college students from Wake Forest University. Observers …
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The effects of image quality on reading performance and perceived image quality from CRT and hard-copy displays
… on reading and on perceived image quality from CRT and hard copy were studied in this experiment. The results showed that as the image quality of a display increased, indicated by an increase in the value of the MTFA, the reading speed increased and subjective image quality V; ratings increased. …
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Effects of illuminance, luminance, viewing angle, and screen test pattern on the perception of flicker in CRT displays
… angle affect the perception of flicker in a CRT, especially in relation to the flicker evaluation method in the ANSI/HFS 100-1988 standard. Twenty participants viewed a CRT at different viewing angles, under different levels of illuminance and luminance, and with different screen test …
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Effects of pelvic 3D-CRT versus IMRT radiation therapy on circulating pro-inflammatory cytokines in high risk Prostate Cancer patients
… by 3-dimensional radiation therapy pelvic (3D CRT) or intensity-modulated radiation therapy (IMRT). Subjects included 90 patients who had not previously received treatment for their prostate cancer, and who were planned to receive androgen deprivation therapy for three years, plus concurrent …
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Evaluation of the Survival Effect for Various Treatment Modalities Among Stage II and III Rectal Cancer Patients in California, 1994-2009
… versus postoperative chemoradiotherapy (PostOP CRT) found no survival benefit. However, the effect of a change from PostOP to PreOP CRT has not been evaluated in a population-based setting. We sought to evaluate multimodal treatment changes and overall survival for perioperative (PeriOP) CRT …
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Efficient RSA Cryptosystems Immune against the Hardware Fault Attack and the FPGA Implementations
… immunity against the hardware fault attack for CRT-based two-prime and multi-prime RSA cryptosystems are proposed, investigated, and compared to the previous work. The VLSI implementations of these cryptosystems are carried out in the thesis project and the results are presented, which …
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Responding to resynchronization : improving the impact of biventricular pacing in the management of chronic heart failure
Cardiac resynchronization therapy (CRT) is a recent therapeutic intervention that is delivered by the implantation of a biventricular pacemaker system. The mechanism of action is believed to be the correction of dyssynchrony of myocardial contraction. This approach can reduce morbidity and …
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Characterization of brain response following cranial radiotherapy
Cranial radiotherapy (CRT) is a vital component for the treatment of pediatric brain tumors, with combination therapy that includes CRT resulting in almost 90\% five-year survival. However, survivors treated with CRT exhibit alterations in brain development and long-term deficits in brain structure …
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