Submitted in fulfilment of the requirements of the Masters in Education in the Department of Educational Planning and Administration in the Faculty of education at the University of Zululand, 2019. / The 1994 democratic government of South Africa brought greater responsibility and growth of school-based management in schools which impacted on the role and workload of school leaders. Principals of public foundation phase school teachers delegated greater responsibility to Heads of Departments who had to ensure that teachers are professionally developed. The assumption was that teachers should be supported and developed professionally to do their best work with learners, and, to be retained. Despite the belief that school-based Teacher Professional Development may have a positive impact, little is known about the challenges Heads of Departments’ of Tshivenda Language in a rural context face in managing teachers for them to promote quality teaching and learning. The aim of this study was to investigate the challenges that heads of departments face in managing the teaching of Tshivenda home language in rural primary schools of Dzindi circuit in Vhembe District. This study was positivist in nature following the quantitative research methodology. Self-administered questionnaires were used to collect data from 107 respondents from the 200 who were sampled through simple random sampling procedure. Several challenges that face the HODs were identified. These include the need to supervise teachers in the process of teaching to improve learning in schools. The study points to a strong need for workshops to fully capacitate HODs of Tshivenda in rural primary schools of Dzindi Circuit. However, the various management challenges that have emerged should be considered. Mentoring of Tshivenda Home Language teachers by HODs remains very crucial for the promotion of teaching and learning in rural primary schools of Dzindi Circuit. The study recommends a need for HODs to motivate teachers in their management process. / National Research Foundation of South Africa

A dissertation submitted to the Faculty of Education in partial fulfillment of the requirements for the Degree of Master of Education in the Department of Educational Psychology and Special Needs Education at the University Of Zululand, 2017 / The aim of this study was to investigate the relationship between texting language and language development amongst Intermediate Phase learners. The study, which used the quantitative approach, sought to determine the influence of learner characteristics on texting language, determine if learners use texting language in the written forms of English, determine if learners are able to write in the standard form of English, and ascertain if texting affects spelling.The target population were learners in the Intermediate Phase, which is learners from Grade 4 up to Grade 6. There were 213 learners who took part in the study. All these learners were from five African schools, and learnt English as a second language. The instrument used for data collection was divided into four sections: demographic characteristics, translation of texts from Standard English to texting language, translation of texts from texting language to Standard English and also spelling. The SPSS version 24 was used to analyse the results collected from the study. The findings of the study reveal that age and the grade that the learner is doing has no influence on texting and the learner’s language development. Gender has an influence on texting and the learner’s language development. Female learners were found to text more than male learners. There is also no relationship between learner’s access to cellular phones and their language development. Learners are texting and they know how to text irrespective of whether they own a cellular phone, have access to one or do not have access to one at all. However, the study revealed that there is a positive relationship between texting language and Standard English. Texting language cannot come into existence without one first learning and knowing the Standard English language.Based on the findings, the study recommended that teachers should recognise the importance of English language and should organise extra-curricular and co-curricular activities to enhance language development in learners. The Department of Education should promote and support activities that will help learners to improve their language skills.

Dissertation submitted in accordance with the requirements for the Master’s Degree in Education in the Department of Foundation of Education, Faculty of Education at the University of Zululand, 2019. / This study investigated the effects of curriculum changes on Mathematics teaching and learning in foundation phase, in Sibasa circuit, in Limpopo province. The study made use of a qualitative approach by means of interviews. Purposive sampling was utilised to select participants for this study. Results show that: policy makers failed to involve different stakeholders before introducing the new curriculum, the department did not regularly convenes workshops, seminars, and conferences and even continued trainings for Mathematics teachers; there is lack of teacher learner support materials that makes changes in curriculum and affects teaching and learning in a negative way.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1986. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING / Bibliography: leaf 84. / by Robert Gould Gibson. / M.S.

Le suivi des espaces urbanisés et de leurs dynamiques spatio-temporelles représente un enjeu important pour la population urbaine, autant sur le plan environnemental, économique et social. Avec le lancement des satellites portant des radars à synthèse d’ouverture de la nouvelle génération (TerraSAR-X, COSMO-SkyMed, ALOS, RADARSAT-2,Sentinel-1, Constellation RADARSAT), il est possible d’obtenir des séries temporelles d’images avec des résolutions spatiales et temporelles fines. Ces données multitemporelles aident à mieux analyser et décrire les structures urbaines et leurs variations dans l’espace et dans le temps. L’interférométrie par satellite est effectuée en comparant les phases des images RSO prises à différents passages du satellite au-dessus du même territoire. En optant pour des positions du satellite séparées d’une longue ligne de base, l’InSAR mène à la création des modèles numériques d’altitude (MNA). Si cette ligne de base est courte et à la limite nulle, nous avons le cas de l’interférométrie différentielle (DInSAR) qui mène à l’estimation du mouvement possible du terrain entre les deux acquisitions. Pour toutes les deux applications de l’InSAR, deux opérations sont importantes qui garantissent la génération des interférogrammes de qualité. La première est le filtrage du bruit omniprésent dans les phases interférométriques et la deuxième est le déroulement des phases. Ces deux opérations deviennent particulièrement complexes en milieu urbain où au bruit des phases s’ajoutent des fréquents sauts et discontinuités des phases dus à la présence des bâtiments et d’autres structures surélevées. L’objectif de cette recherche est le développement des nouveaux algorithmes de filtrage et de déroulement de phase qui puissent mieux performer que les algorithmes considérés comme référence dans ce domaine. Le but est d’arriver à générer des produits InSAR de qualité en milieu urbain. Concernant le filtrage, nous avons établi un algorithme qui est une nouvelle formulation du filtre Gaussien anisotrope adaptatif. Quant à l’algorithme de déroulement de phase, il est fondé sur la minimisation de l’énergie par un algorithme génétique ayant recours à une modélisation contextuelle du champ de phase. Différents tests ont été effectués avec des images RSO simulées et réelles qui démontrent le potentiel de nos algorithmes qui dépasse à maints égards celui des algorithmes standard. Enfin, pour atteindre le but de notre recherche, nous avons intégré nos algorithmes dans l’environnement du logiciel SNAP et appliqué l’ensemble de la procédure pour générer un MNA avec des images RADARSAT-2 de haute résolution d’un secteur de la Ville de Montréal (Canada) ainsi que des cartes des mouvements du terrain dans la région de la Ville de Mexico (Mexique) avec des images de Sentinel-1 de résolution plutôt moyenne. La comparaison des résultats obtenus avec des données provenant des sources externes de qualité a aussi démontré le fort potentiel de nos algorithmes. / The monitoring of urban areas and their spatiotemporal dynamics is an important issue for the urban population, at the environmental, economic, as well as social level. With the launch of satellites carrying next-generation synthetic aperture radars (TerraSAR-X, COSMO-SkyMed, ALOS, RADARSAT-2, Sentinel-1, Constellation RADARSAT), it is possible to obtain time series of images with fine temporal and spatial resolutions. These multitemporal data help to better analyze and describe urban structures, and their variations in space and time. Satellite interferometry is performed by comparing the phases of SAR images taken at different satellite passes over the same territory. By opt-ing for satellite positions separated by a long baseline, InSAR leads to the creation of digital elevation models (DEM). If this baseline is short and, at the limit zero, we have the case of differential interferometry (DInSAR) which leads to the estimation of the possible movement of the land between the two acquisitions. In both InSAR applica-tions, two operations are important that ensure the generation of quality interferograms. The first is the filtering of ubiquitous noise in the interferometric phases and the second is the unwrapping of the phases. These two operations become particularly complex in urban areas where the phase noise is added to the frequent jumps and discontinuities of phases due to the presence of buildings and other raised structures. The objective of this research is the development of new filtering and phase unwrap-ping algorithms that can perform better than algorithms considered as reference in this field. The goal is to generate quality InSAR products in urban areas. Regarding filtering, we have established an algorithm that is a new formulation of the adaptive anisotropic Gaussian filter. As for the phase unwrapping algorithm, it is based on the minimization of energy by a genetic algorithm using contextual modelling of the phase field. Various tests have been carried out with simulated and real SAR images that demonstrated the potential of our algorithms that in many respects exceeds that of standard algorithms. Finally, to achieve the goal of our research, we integrated our algorithms into the SNAP software environment and applied the entire procedure to generate a DEM with high-resolution RADARSAT-2 images from an area of the City of Montreal (Canada) as well as maps of land movement in the Mexico City region (Mexico) with relatively medium-resolution Sentinel-1 images. Comparison of the results with data from external quality sources also demonstrated the strong potential of our algorithms.

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Die Bestimmung der Plasmaviskositaet und des Haptoglobin beim Rind erweisen sich als sinnvolle Ergaenzungen in der Labordiagnostik. Ihre Bestimmung als Suchtest zur Fruehdiagnostik von praxisrelevanten Rinderkrankheiten ist zu empfehlen.

The major challenge associated with saving energy in the pumping stations of the fluid transportation in the pipeline networks, especially the crude oil transportation for long-distance is drag forces. In other words, this grossly increases the drag form force and friction losses making fluids transport inside pipeline taken a long time to pass, that increases energy consumption and costs. Therefore, the effective solution to overcome these problems is added drag reduction materials (DRMs) with the main fluid using the drag reduction technique (DR). One of the most important drag reduction technique to enhance flow in the pipeline is an active drag reduction using DRMs. Where the DRMs can reduce drag forces in relatively small amounts part per million (ppm), as well as environment friendly. Thereby, the drag reduction enhancement is highly important in terms of fluid transportation in the many industrial applications. An experimental and mathematical study have been performed in the fully development flow to measure fluid characteristics and to evaluate %DR using various DRMs: polymers, surfactants, and nanoparticles in pipeline network. The active drag reduction experiments have been conducted in the rotational disk apparatus (RDA) and in the closed-loop recirculation system (CLRS) using different solutions of DRMs: individual, binary, and triple at different Reynolds numbers (Re) and at different concentrations. The morphological tests have been done employing XDR, TEM and SEM techniques. Mathematical model was presented to validate the experimental results using the statistic softwareV6.2. The results have been displayed with complete explanation, analysis, and conclusions. The results show that the %DR increases with increasing the velocity (Re) and concentration for the most of DRMs solutions. Also, the results confirm that the use of nanoparticle in complex solutions is more effective than using nanoparticle individually within the same work condition. further, the new complex solutions were formed in a manner that can contribute significantly to increase drag reduction performance and enhance shear resistance of the DRMs. Finally, all microscopy techniques confirm the fact that complex solutions were effectively formed and homogenized within the main fluid.

With existing numerical models for fluid particle systems in CHEM, the acoustic-particle interactions associated with two-phase dilute dispersed flow can be captured and the particle model can be validated using experimental and analytical data and verified using numerical techniques. The experimental and analytical data come from Zink and Delsasso and provides data for particles of diameters 5 to 15 microns for frequencies between 500Hz to 13600Hz. In the particle number density measurements by Zink and Delsasso there was a 10% estimated error range. Using the fourth order skew symmetric flux in CHEM and the built in Eulerian and Lagrangian particle models, the sound wave dissipation was captured and found to be within the margin of error. Two additional tests were conducted to measure the effect of nonlinear acoustics and increased bulk density on the dissipation. Nonlinear effects showed no significant effect and the linear increase in bulk density showed a linear increase in dissipation.

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