Depression is a psychiatric disorder associated with severe impairment in physical, social and role functioning, and with higher health care utilization. Experiencing an event that causes physical or psychological stress may substantially increase a person's chances of developing depression. Coping has been defined as a response aimed at diminishing the physical, emotional and psychological burden that is associated with stressful life events. Coping is considered one of the core concepts in health psychology and is strongly associated with the regulation of emotions throughout the stress period and thus it is important that it is understood, especially in the South African context of future morbidity. The purpose of this study was to determine whether there is a relationship between coping self–efficacy strategies and depression in an African context. Participants consisted of a convenience sample of 2 198 participants from both rural and urban areas. The rural group consisted of 182 adolescent Further Education and Training (FET) students between the ages of 16 and 21 years, and the urban group consisted of another 2 016 adolescent FET students between the ages of 16 and 21 years. Participants from both groups completed measurements on coping and depression. Two self–report measures were used: the Coping Self–Efficacy Scale (CSE) to determine a person's confidence or perceived self–efficacy in performing coping behaviors when facing life challenges or threats and the Patient Health Questionnaire (PHQ9) to measure depression severity. Descriptive analysis results indicated that a relationship existed between coping selfefficacy strategies and depression and that levels of depression were very similar for both rural (9.23) and urban (9.25) groups. Coping strategies were very different in rural and urban areas; rural participants only used problem–focused coping and stop unpleasant thoughts and emotions, while urban participants used all three coping self–efficacy strategies: problemfocused coping, stopping unpleasant thoughts and emotions and support from friends and family. Rural participants did not use support from friends and family as a coping selfefficacy strategy; possibly due to the different relationships people living in rural areas have with one another, as opposed to the relationships of people living in urban areas. Rural people may not deem it socially acceptable to ask friends or family members or help when struggling with various stressors. Alternatively, rural areas may be more depleted of personal resources due to the strong urbanization process going on. It was concluded that there is an important relationship between coping strategies and level of depression, and in this study this relationship was found to be different in some ways for rural and urban groups. The results of this study have great implications for further research and clinical practice. / Thesis (M.A. (Research Psychology))--North-West University, Potchefstroom Campus, 2011.

Please read the abstract in the dissertation. / Dissertation (MEd)--University of Pretoria, 2010. / Educational Psychology / unrestricted

Wireless sensor networks are used in several multi-disciplinary areas covering a wide variety of applications. They provide distributed computing, sensing and communication in a powerful integration of capabilities. They have great long-term economic potential and have the ability to transform our lives. At the same time however, they pose several challenges – mostly as a result of their random deployment and non-renewable energy sources.Among the most important issues in wireless sensor networks are energy efficiency and radio interference. Topology control plays an important role in the design of wireless ad hoc and sensor networks; it is capable of constructing networks that have desirable characteristics such as sparser connectivity, lower transmission power and a smaller node degree.In this research a distributed topology control technique is presented that enhances energy efficiency and reduces radio interference in wireless sensor networks. Each node in the network makes local decisions about its transmission power and the culmination of these local decisions produces a network topology that preserves global connectivity. The topology that is produced consists of a planar graph that is a power spanner, it has lower node degrees and can be constructed using local information. The network lifetime is increased by reducing transmission power and the use of low node degrees reduces traffic interference. The approach to topology control that is presented in this document has an advantage over previously developed approaches in that it focuses not only on reducing either energy consumption or radio interference, but on reducing both of these obstacles. Results are presented of simulations that demonstrate improvements in performance. AFRIKAANS : Draadlose sensor netwerke word gebruik in verskeie multi-dissiplinêre areas wat 'n wye verskeidenheid toepassings dek. Hulle voorsien verspreide berekening, bespeuring en kommunikasie in 'n kragtige integrate van vermoëns. Hulle het goeie langtermyn ekonomiese potentiaal en die vermoë om ons lewens te herskep. Terselfdertyd lewer dit egter verskeie uitdagings op as gevolg van hul lukrake ontplooiing en nie-hernubare energie bronne. Van die belangrikste kwessies in draadlose sensor netwerke is energie-doeltreffendheid en radiosteuring. Topologie-beheer speel 'n belangrike rol in die ontwerp van draadlose informele netwerke en sensor netwerke en dit is geskik om netwerke aan te bring wat gewenste eienskappe het soos verspreide koppeling, laer transmissiekrag en kleiner nodus graad.In hierdie ondersoek word 'n verspreide topologie beheertegniek voorgelê wat energie-doeltreffendheid verhoog en radiosteuring verminder in draadlose sensor netwerke. Elke nodus in die netwerk maak lokale besluite oor sy transmissiekrag en die hoogtepunt van hierdie lokale besluite lewer 'n netwerk-topologie op wat globale verbintenis behou.Die topologie wat gelewer word is 'n tweedimensionele grafiek en 'n kragsleutel; dit het laer nodus grade en kan gebou word met lokale inligting. Die netwerk-leeftyd word vermeerder deur transmissiekrag te verminder en verkeer-steuring word verminder deur lae nodus grade. Die benadering tot topologie-beheer wat voorgelê word in hierdie skrif het 'n voordeel oor benaderings wat vroeër ontwikkel is omdat dit nie net op die vermindering van net energie verbruik of net radiosteuring fokus nie, maar op albei. Resultate van simulasies word voorgelê wat die verbetering in werkverrigting demonstreer. / Dissertation (MEng)--University of Pretoria, 2010. / Electrical, Electronic and Computer Engineering / unrestricted

The authority of parents within the parent child relationship has developed from the rigid potestas which the pater in Roman Law could legally exercise to the authority of both parents in Roman-Dutch Law. The relationship had always been based in the biological sphere while the guardianship of the fathers had always been stronger than that of the mother. The position had been altered statutoraly in the Guardianship Act to provide for guardianship for the mother to be equal to that of the father.Under pressure of Constutional norms and prescripts on the one hand and also because of dramatically changed circumstances on the other it has become imperative that the foundation of the relatiopship would be reconcidered to determine its appropriateness for modern circumstances. Parental responsibilities and rights agreements as well as parenting plans to establish such responsibilities and rights in situations where it does not pertain to a perticular parent or a person concerned consequently reflect new and progressive thinking with regard to the nature and content of the relationship. In addition it may be noted that these agreements and plans reflect an inclination on the side of the legislature to move away from expensive, cumbersome and aggresive litigation bt providing the opportunity to persons concerned to come to mutaully acceptable results. It is futher argued that these agreements and plans may be viewed as a first step for the establishment of Family Relationshiop Centres it has developed in Australian Law / LLM (Private Law), North-West University, Potchefstroom Campus, 2014

The authority of parents within the parent child relationship has developed from the rigid potestas which the pater in Roman Law could legally exercise to the authority of both parents in Roman-Dutch Law. The relationship had always been based in the biological sphere while the guardianship of the fathers had always been stronger than that of the mother. The position had been altered statutoraly in the Guardianship Act to provide for guardianship for the mother to be equal to that of the father.Under pressure of Constutional norms and prescripts on the one hand and also because of dramatically changed circumstances on the other it has become imperative that the foundation of the relatiopship would be reconcidered to determine its appropriateness for modern circumstances. Parental responsibilities and rights agreements as well as parenting plans to establish such responsibilities and rights in situations where it does not pertain to a perticular parent or a person concerned consequently reflect new and progressive thinking with regard to the nature and content of the relationship. In addition it may be noted that these agreements and plans reflect an inclination on the side of the legislature to move away from expensive, cumbersome and aggresive litigation bt providing the opportunity to persons concerned to come to mutaully acceptable results. It is futher argued that these agreements and plans may be viewed as a first step for the establishment of Family Relationshiop Centres it has developed in Australian Law / LLM (Private Law), North-West University, Potchefstroom Campus, 2014

The primary aim of this research was to determine whether there is a relation between locus of control, transformational leadership and management success. One hundred and one shift overseers completed selfevaluation questionnaires on locus of control and transformational leadership. Thereafter, in turn, the managers completed evaluation questionnaires on the work performance of the shift overseers. The Pearson correlation coefficient showed statistically significant interrelations between internal locus of control, autonomy and transformational leadership. The three scales of management success also showed a strong positive correlation. Canonical correlations indicated that only one variant could be interpreted and that high internal control and high autonomy are associated with high transformational leadership and laissez faire leadership style. According to the literature overview, a positive relation exists between internal locus of control, transformational leadership and management success as well as organisational performance. An attempt is made to account for these diverse findings in terms of the relevance of a performance model within an organisational context. / Die primere doel van hierdie navorsingstudie was om te bepaalof daar 'n verband is tussen lokus van beheer, transformasionele leierskap en bestuursukses. Eenhonderd en een skoftoesighouers het selfbeoordelings-vraelyste oor lokus van beheer en transformasionele leierskap voltooi. Daarna het die bestuurders beoordelingsvraelyste oor die skoftoesighouers se werksprestasie voltooi. Die Pearson korrelasietoets het getoon dat daar statisties beduidende verbande is tussen interne lokus van beheer, outonomie en transformasionele leierskap. Die drie skate van bestuursukses het onderling sterk positief gekorrelleer. Kanoniese korrelasies het aangedui dat slegs een variaat interpreteer kan word en dat hoe interne beheer en hoe outonomie geassosieer is met hoe transformasionele leierskap en lae laissez faire-leierskapstyl. Die literatuurstudie het getoon dat daar 'n positiewe verband is tussen interne lokus van beheer, transformasionele leierskap en bestuursukses asook organisasie-prestasie. Verklarings vir hierdie teenstellende bevindings word gegee aan die hand van die relevansie van 'n prestasiemodel binne 'n organisasiekonteks. / Industrial and Organisational Psychology / M.A. (Industrial and Organisational Psychology)

Qu’ils soient néerlandais, anglais ou français, les ingénieurs du génie civil ont toujours fait autorité en matière d’aménagement du littoral. A travers la recherche constante d’innovations techniques, ils ont contribué à modeler le littoral – voire à le créer de toute pièce aux Pays-Bas – et imposé une vision techniciste de ce territoire entre terre et mer. Le tournant écologique et social qui a caractérisé les années 1970 a remis en question cette vision imposée par les ingénieurs, créant un véritable bouleversement pour la profession. Cette étude comparée tente d’expliquer comment les ingénieurs se représentent aujourd’hui le littoral qu’ils aménagent, et comment, en concertation avec d’autres scientifiques, ils élaborent désormais des solutions innovantes en adéquation avec une gestion intégrée du littoral. Il ressort que l’opposition entre vision linéaire et statique du littoral, longtemps imputée aux ingénieurs, et celle, plus large et systémique, généralement attribuée aux autres scientifiques, s’estompe. Des différences culturelles entre les trois pays semblent plus pertinentes pour expliquer les avancées observées. Par ailleurs, les ingénieurs semblent être en train de dépasser et de s’approprier le mouvement « vert » des dernières décennies pour saisir de nouvelles opportunités, tant professionnelles que territoriales. / Whether Dutch, English or French, civil engineers have long been a recognized authority on coastal management. Through their relentless search for technical innovations, engineers have been instrumental in both shaping the coast – in the case of the Netherlands creating it almost entirely – and imposing on it a technical vision. The social and ecological movement which characterized the 1970’s brought this engineering vision into question. This change in outlook would create real turmoil for the profession. This comparative study attempts to explain how nowadays engineers envision the coast they manage and how, in collaboration with other scientists, they now derive innovative solutions in line with an integrated coastal management. It appears that the classical opposition, between a vision long imputed to engineers of a static and linear coast and one attributed to other scientists who view the coast as something larger and more systemic, has become blurred. Cultural differences between the three countries are more relevant to explain the differences observed. Into the bargain engineers seem to have overtaken the “green” movement of the last decades to seize new opportunities, professional ones as well as territorial. / Of ze nu Nederlands, Engels of Frans zijn, de waterbouwers zijn autoriteit als het aankomt op het beheren van de kust. Met hun niet aflatende zoektocht naar innovatieve technieken hebben ze een bijdrage geleverd aan het vormen van de kustlijn – of om het even welke deel van Nederland dan ook – en hebben ze de kustlijn gevormd op een technocratische wijze. De ecologische en sociale omwenteling, kenmerkend voor de jaren ’70, heeft vraagtekens gezet bij deze, door ingenieurs opgelegde, visie en veroorzaakte een serieuze omwenteling in het vakgebied. Deze studie probeert uit te leggen hoe de ingenieur vandaag de dag de kust behartigt en hij hoe tegenwoordig in overleg met andere wetenschappen nieuwe oplossingen ontwikkelt die in lijn zijn met een integraal kustbeheer. Het blijkt dat het onderscheid tussen de rechtlijnige en statische visie over de kust, lang toegeschreven aan ingenieurs, en de bredere en systematische aanpak, over het algemeen toegeschreven aan andere wetenschappers, vervaagt. Culturele verschillen tussen de drie landen lijken een belangrijkere reden te zijn voor de geconstateerde ontwikkelingen. Daarnaast lijken de ingenieurs zich de "groene" kennis in de afgelopen decennia eigen gemaakt te hebben om nieuwe kansen te grijpen, zowel voor hun vak als voor hun omgeving.

Various researchers highlight the role of neuro-motor and visual motor integration problems on learning-related barriers (Mutti et al., 1998; Goldstein & Britt, 1994; Kulp, 1999; Lotz et al., 2005; Van Roon et al., 2010). Visual motor integration and neuro-motor problems, that include perceptual, gross- and fine motor problems further relates to writing, reading, spelling and mathematical problems (Cheatum & Hammond, 2000). The visual system plays an important role in visual motor integration and researchers found ocular-motor control to correlate with learning-related problems and are therefore investigated (Vaughn et al., 2006). The aim of the study was twofold. The first aim was to determine the nature of neuro-motor problems that are present in 7- to 8-year old children with learning-related problems (writing, reading, spelling and mathematical problems). The second aim was to determine the nature of ocular-motor control and visual-motor integration that are present in 7- to 8-year old children with learning-related problems (writing, reading, spelling and mathematical problems). Sixty-eight learners (45 boys and 23 girls) with and without learning-related problems took part in the study. The group with learning-related problems (n=31) consisted of learners that received remedial intervention in Grade 1 and were in Grade 2 during the data collection. The control group (n=37) represented the study group for age and gender with a mean age of 7.5 years (SD=0.43) and had no learning-related problems. The Quick Neurological Screening Test II (QNST-II) and the Sensory Input Systems Screening Test (SISM) were used to determine the state of neuro-motor development and the visual and ocular-motor control status of learners. The Developmental Test of Visual-Motor Integration - 4th ed. (VMI-4) were used to evaluate the visual-motor integration of learners. The Statistica for Windows 2011 computer program was used to do the data processing (StatSoft, 2011). Differences between learners with and without learning-related problems were determined by an independent t-test. A multi-dimensional representation of learners with learning-related problems were established by means of a correspondence analysis of twoway variance tables with respect to reading, writing, spelling and mathematical problems. Results indicate that statistical as well as practical significant differences were found between learners with and without learning-related problems with respect to neuro-motor, visual-motor integration as well as ocular-motor problems. Neuro-motor problems were found between the two groups in visual, auditory, and tactile perception as well as different gross motor skills and were associated with reading, writing, spelling and mathematical problems. Regarding ocularmotor control and visual-motor integration, statistical- (p≤0,01) as well as practical (d≥0,8) significant differences were found between learners with and without learning related problems in visual-motor integration as well as 10 of the 11 sub-items of the SISM which include the following: fixation with both eyes, fixation with right eye, fixation with left eye, ocular alignment with right eye, ocular alignment with left eye, tracking with both eyes, tracking with right eye, tracking with left eye, vertical tracking and horizontal tracking. It can be concluded from the results that a significant correlation could be found between neuro-motor problems, that includes ocular-motor control as well as visual-motor integration and learning-related problems (reading, writing, spelling and mathematical problems). Neuromotor skills as well as visual-motor integration should therefore be incorporated in intervention of children with learning-related problems. / Thesis (MA (Kinderkinetics))--North-West University, Potchefstroom Campus, 2013.

Various researchers highlight the role of neuro-motor and visual motor integration problems on learning-related barriers (Mutti et al., 1998; Goldstein & Britt, 1994; Kulp, 1999; Lotz et al., 2005; Van Roon et al., 2010). Visual motor integration and neuro-motor problems, that include perceptual, gross- and fine motor problems further relates to writing, reading, spelling and mathematical problems (Cheatum & Hammond, 2000). The visual system plays an important role in visual motor integration and researchers found ocular-motor control to correlate with learning-related problems and are therefore investigated (Vaughn et al., 2006). The aim of the study was twofold. The first aim was to determine the nature of neuro-motor problems that are present in 7- to 8-year old children with learning-related problems (writing, reading, spelling and mathematical problems). The second aim was to determine the nature of ocular-motor control and visual-motor integration that are present in 7- to 8-year old children with learning-related problems (writing, reading, spelling and mathematical problems). Sixty-eight learners (45 boys and 23 girls) with and without learning-related problems took part in the study. The group with learning-related problems (n=31) consisted of learners that received remedial intervention in Grade 1 and were in Grade 2 during the data collection. The control group (n=37) represented the study group for age and gender with a mean age of 7.5 years (SD=0.43) and had no learning-related problems. The Quick Neurological Screening Test II (QNST-II) and the Sensory Input Systems Screening Test (SISM) were used to determine the state of neuro-motor development and the visual and ocular-motor control status of learners. The Developmental Test of Visual-Motor Integration - 4th ed. (VMI-4) were used to evaluate the visual-motor integration of learners. The Statistica for Windows 2011 computer program was used to do the data processing (StatSoft, 2011). Differences between learners with and without learning-related problems were determined by an independent t-test. A multi-dimensional representation of learners with learning-related problems were established by means of a correspondence analysis of twoway variance tables with respect to reading, writing, spelling and mathematical problems. Results indicate that statistical as well as practical significant differences were found between learners with and without learning-related problems with respect to neuro-motor, visual-motor integration as well as ocular-motor problems. Neuro-motor problems were found between the two groups in visual, auditory, and tactile perception as well as different gross motor skills and were associated with reading, writing, spelling and mathematical problems. Regarding ocularmotor control and visual-motor integration, statistical- (p≤0,01) as well as practical (d≥0,8) significant differences were found between learners with and without learning related problems in visual-motor integration as well as 10 of the 11 sub-items of the SISM which include the following: fixation with both eyes, fixation with right eye, fixation with left eye, ocular alignment with right eye, ocular alignment with left eye, tracking with both eyes, tracking with right eye, tracking with left eye, vertical tracking and horizontal tracking. It can be concluded from the results that a significant correlation could be found between neuro-motor problems, that includes ocular-motor control as well as visual-motor integration and learning-related problems (reading, writing, spelling and mathematical problems). Neuromotor skills as well as visual-motor integration should therefore be incorporated in intervention of children with learning-related problems. / Thesis (MA (Kinderkinetics))--North-West University, Potchefstroom Campus, 2013.

With parts of SA in a malaria endemic area, a preventative way of fighting malaria is with the use of pesticides such as 1,1,1–Trichloro–2,2–bis(pclorophenyl) ethane, also known as DDT. DDT is listed under the persistent organic pollutants (POPs) and considered an endocrine disruptive compound (EDC) under the Stockholm Convention. SA registered an exemption to use DDT as means to fight malaria. DDT and its isomers are, however, known EDCs. Combined with their ability to persist in the environment while not being target specific motivates further studies into possible detrimental effects. The present study aimed to establish if ED was present by comparing the male reproductive organs from snails from an area currently sprayed with DDT (for malaria control) to an area not sprayed with DDT in the Limpopo Province. A possible endpoint (the penis sheath/preputium length ratio or PSPLR) was identified for the freshwater snail Bulinus tropicus. B. tropicus and sediment samples were collected from DDT–sprayed and nonsprayed areas located close together. The snails were dissected and various morphometric parameters measured. Sediments from the sites where the snails were collected were analysed for DDT using GC–MS. Statistical analysis showed significant differences in PSPLR (and therefore possible ED) between snails from the two areas. The difference in PSPLR values was mainly due to a relatively shorter preputium for the snails from the DDT–sprayed area. Even though the sediment samples showed that DDT was present in most of the DDT–sprayed sites and not in the non–DDT sprayed sites, causality of the possible ED could not be established from this field study. This study indicated the possibility of using the PSPLR as endpoint for ED. Recommendations are made for further development of the PSPLR and B. tropicus as biological indicators for endocrine disruption, but causality must first be established. / Thesis (M.Sc (Environmental Science))--North-West University, Potchefstroom Campus, 2011.