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.
Results
Showing 1 to 20 of 65 for “"Poor results"”.
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Analyzing and synthesizing deformations in image datasets
… each test input. Some of these methods produce poor results on complex problems. For example, image warping methods struggle with non-planar objects and occlusions. Furthermore, for large inputs, some of these algorithms can be quite slow. For instance, a state-of-the-art medical image …
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Investigating the principals’ leadership roles on influencing teaching and learning at secondary schools in Ohangwena region, Namibia
… schools level. The study was prompted by the poor grade 12 Namibia Senior Secondary Certificate results inconsistence in the past 5 years in Ohangwena region. Ten (10) secondary schools in Ohangwena region were chosen according to their performance based on five years Namibia Senior Secondary …
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Remediation of Sand Dune Blowouts Along Pipeline Right of Ways.
… are using temporary mitigation methods. Results presented in this study demonstrate that there are low cost, long term solutions to the problem of blowouts along pipeline right of ways. Studies were conducted using three low cost mitigation methods. Branch piles showed that a successful …
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Measurement of antenna radiation efficiency using improved Wheeler cap algorithm
… the conventional Wheeler cap method yields poor results for electrically larger structures. When efficiency estimates can be obtained, they are often valid only over a narrow frequency band. Higher-order equivalent circuit models may be employed in a modified Wheeler cap algorithm to …
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Tunnel filters and optical amplifiers for use in fiber optic communication systems
… It is shown that gain control gives very poor results, whereas power control does not severely limit the system performance, particularly when a small number of amplifiers are used.
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Development and optimization of photoredox-mediated methine epimerization
… strategy to the epimerization of steroids gave poor results and demonstrated limited selectivity, but insights gained from this work were used to develop a hypothesis for epimerization. We proposed that H-atom abstraction and donation occur to release diaxial strain and form the most …
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Professional development of teachers for promoting teaching and learning in rural primary schools of Tshinane circuit
… continue to underperform as evidenced by poor results in schools. The aim of this study was to investigate the extent to which teachers are professionally developed to promote teaching and learning in rural primary schools. The study was conducted through mixed methods approach. Simple …
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Potential-flow Inflow Model Including Wake Distortion and Contraction
… (one can use one or the other but not both), 2.) poor results downstream in the limit of shallow skew angles, 3.) poor convergence inside of the rotor wake, 4.) lack of the effects of wake curvature and wake contraction, and 5.) lack of other important nonlinearities. This thesis uses applications …
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Learning to reformulate long queries
… in more detail. However, the user often receives poor results in response to the long queries from today's Information Retrieval systems. For the document to be returned as a relevant result, the system requires every query term to appear in the document. This makes the search task especially …
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Optimizing Response Time, Rather than Hit Rates, of WWW Proxy Caches
… that minimizes only the download time yields poor results. However, a new algorithm is investigated that does provide improved performance over common removal algorithms using three factors --- the speed at which a file is downloaded, the size of the file, and the number of references to the …
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Experimental and theoretical investigation of optimal control methods with model reduction
… to model so differences between the analytical results and experimental measurements were present. These differences required the application a correction method to the reduced models developed for the second structure. The correction method was shown to work with good results on one reduced …
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Educators’ and learners’ views on factors that contribute to poor performance of grade 12 physical science learners in the uMkhanyakude District in KwaZulu-Natal
… continue to be one of the subjects that yield poor results in Grade 12 every year. Many factors have been said to contribute to the poor Grade 12 results including resources and teaching methods. This study however, investigated the educators’ and learners’ views on factors that contribute to …
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The Effects of Automation Expertise, System Confidence, and Image Quality on Trust, Compliance, and Performance
… their trust in the diagnostic system's advice. Results indicated that system confidence and automation expertise influenced automation trust, compliance, and measures of detection performance, particularly when image quality was poor. Results also highlighted several incurred costs of system …
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Confusion modelling for lip-reading
… However, this work has so far produced poor results because of factors such as high variability of speaker features, diffi�culties in mapping from visual features to speech sounds, and high co-articulation of visual features. The motivation for the work in this thesis is inspired by …
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Quantum mechanical molecular scattering theory: Orbiting to room temperature
… the rigid rotor approximation. Close Coupling results were compared with those of the L-average form of Coupled States (CS), its first order perturbational improvement, the Recoupled (RE) method, and an extension of the Exponential Distorted Wave (EDW) method called the EX method. EX used the …
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Techniques for compressible flow calculations on multi-zone grids
… calculated as another test problem. Due to the poor results of the Baldwin-Lomax turbulent model for separated flows, only the attached flowtield is considered in the analytic forebody calculation. Finally, as applications of this approach, the inviscid/viscous flowfields about several …
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Performance Of Interface Elements In The Finite Element Method
… elements can be severely distorted and cause poor results. Accurate results are obtained in shell-shell and shell-solid combinations. The most interesting result is that not using interface elements can lead to severe inaccuracies. This difficulty is illustrated by computing the stress …
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The Role of School Head in Enhancing Students’ Academic Performance in Community secondary Schools in Mbeya Urban
… secondary schools in Mbeya Urban. The CSEE results show that performance has been deteriorating each year. Despite the vast research studies done by various scholars, little is known about the roles of the school heads in relation to the students’ academic performance. Various methodologies …
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A microcomputer controller for a nylon spinning machine
… dedicated controllers had been made, with rather poor results. Consideration of the future requirements of the company showed that there was a clear role for these controllers, and it was clear that there was a need to define standards for their development and implementation, and so a survey of …
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Factors contributing to poor academic performance faced by students, at a selected department rural university, Limpopo Province
… those hopes are shattered when their academic results decrease. Despite poor performance and poor results of students’ academics, there has been a need to investigate why students’ performance differs significantly. Students achieve low academic performance due to psychological, social and …
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