Section 23(2) of the Constitution gives every worker the right to strike and the LRA gives effect to that right. Section 64 of the LRA, however, requires that the issue in dispute first be referred to a bargaining council or the CCMA before a strike can be called. A certificate declaring that the issue in dispute was not resolved or 30 days or, alternatively, any extension must lapse and notice must be given to the employer before a strike can commence. Generally, the issue in dispute referred to conciliation must be the same issue in dispute over which that the strike was called. The question that arises is what will happen to the status of the strike if the issue in dispute or the demand changes during the course of the strike. Reference was made to literature study in which the criteria were set out on how to determine the true issue in dispute. Suggestions were also made on how to declare strike action unprotected should an employer be of the view that its workers are striking over a different issue in dispute or demand than the one that was referred to conciliation. / LLM (Labour Law), North-West University, Potchefstroom Campus, 2015

There are two principal models that purport to interpret the evidence for the origins of the Neolithic period in Thailand. Both stress the importance of rice cultivation and the domestication of a range of animals. One incorporates archaeological and linguistic evidence in identifying the origins as the result of the diffusion of farming communities into Southeast Asia and India from a source in the Yangtze River valley. The alternative stresses a local evolutionary pathway whereby indigenous hunter-gatherers began to cultivate rice within Thailand. This dissertation is centred on the results of the excavation of Ban Non Wat, in the Upper Mun Valley of Northeast Thailand. This has provided one of the largest, best dated and provenanced samples of occupation and mortuary remains of a Neolithic community so far available in Southeast Asia. Its principal objective is to define the motifs incised, impressed and painted onto the surface of ceramic mortuary vessels, in order to permit a comparison with other assemblages first in Thailand, then in Southeast Asia north into China. It is held that if there are close parallels over a wide geographic area, in these motifs, then it would support a model of diffusion. If there are not, then the alternative of local origins would need to be examined closely. It is argued that the similarity in motifs, particularly a stylised human figure, between Thai and Vietnamese sites lends support to a common origin for these groups. The motifs are not so obvious when examining the southern Chinese data, although the mode of decoration by painting, incising and impressing recur there. This, in conjunction with mortuary rituals, weaving technology, the domestic dog, and the linguistic evidence, sustains a model for demic diffusion. However, the presence of ceramic vessels also decorated with impressed/incised techniques in maritime hunter-gatherer contexts stresses that the actual Neolithic settlement may have been more complex.

La première partie de ce mémoire concerne l’étude en solution de systèmes à base de POMset de cations organiques de polarité/taille variables. Ainsi, l’étude des interactions entre unanion Keplerate noté {Mo132} et une large série de cations organiques (composée d’ions alkylammonium AA) a nécessité la mise en place d’une méthodologie spécifique utilisant la RMNDOSY de 1H. La méthode s’est révélée particulièrement efficace et a permis non seulement demettre clairement en évidence l’existence d’interactions anion-cation fortes mais aussil’extraction des constantes d’association à partir d’un traitement quantitatif des données. Cetteétude révèle que le facteur qui domine le processus d’association anion-cation résulte d’un« effet hydrophobe » directement lié au caractère apolaire du cation organique et polaire dusolvant. Les constantes de stabilité sont en accord avec des interactions plutôt fortes. ParParailleurs, une expérience spécifique a permis de titrer les 20 pores présents à la surface de l’ionKeplérate, montrant ainsi la spécificité du processus d’association.La seconde partie de ce mémoire concerne la conception de matériaux à base de Képlerate enjouant sur la nature des cations imidazolium qui lui sont associés. Les phases solides ont étécaractérisées par spectrométrie infrarouge, analyse élémentaire, EDX et analysethermogravimétrique. Ces études montrent que dans certaines conditions, ces systèmes seaffichent un comportement type cristal liquide.La troisième partie s’intéresse spécifiquement aux interactions ionique et/ou van der Waals àl’origine de phénomènes de structuration. L’anion cyclique[Na2K2{Mo4O4S4(H2O)3(OH)2}2(P8W48O184)]32- ( noted 1) a été isolé à l’état solide sous laforme de sels de DODA (dioctadécyl-diméthyl-ammonium) ou d’imidazolium. L’analysestructurale de ces phases par RMN MAS de 1H, 13C et 31P montre sans ambigüitél’organisation des chaines alkyles. Ces résultats croisés avec la microscopie optique polarisée,l’analyse thermique différentielle et la diffraction des rayons X aux petits angles montrentclairement la formation de phases mésomorphes lamellaires dont l’espacement estdirectement lié à la longueur des chaines alkyles. / Herein, we report the use of 1H DOSY NMR methodology to track the interaction between aninorganic multireceptor capsule, referring to the well-defined spherical Keplerate-type{Mo132} ion and a series of organic cation (including tetraalklylammonium). The obtainedresults reveal a strong dependence of the self-diffusion coefficient of the cationic guestsbalancing from the solvated to the plugging situations. Quantitative analysis of the data basedon two-site exchange regime, involving the 20 independent {Mo9O9} receptors of the capsule,allowed determining the stability constants associated to the plugging process of the pores.Surprisingly, the affinity of the capsule for a series of cationic guests increases continuouslywith its apolar character. Such observations evidence that the major factor dictating selectivityin the trapping process is mainly the so-called “hydrophobic effect”.Further investigation focused on the design of Keplerate-based materials where theammonium cations was replaced by imidazolium cations. The obtained materials werecharacterized in the solid state by FT-IR, TGA and elemental analysis. These materials exhibitliquid crystalline phase as evidenced by polarized optical microscopy and DSC, however,folding of the alkyl chain prohibit the formation of well organized mesophase. Finally, thisstrategy was extended to cyclic [Na2K2{Mo4O4S4(H2O)3(OH)2}2(P8W48O184)]32- which wasisolated as DODA or imidazolium salt. Solid state NMR evidence the well organization of thesolid. The obtained materials exhibit smectic A liquid crystalline phase and packed ashexagonal lamellar arrangement in the solid state.

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Obesity is a growing disorder in the United States, affecting over 60% of the population. We previously defined sympathetic nervous system (SNS) outflow from brain to white adipose tissue (WAT) using a viral transneuronal tract tracer. SNS innervation of WAT is the principle initiator of lipolysis, whereas decreases in sympathetic drive promote lipid accumulation. Which of the many origins of SNS outflow from brain to WAT results in SNS-mediated changes in lipid mobilization (increases in drive) or accumulation (decrease in drive) is unknown. Previous research indicates that sympathetic denervation blocks lipid mobilization; thus, rostral sites in the neuroaxis connected to WAT via the SNS may promote WAT lipid mobilization. The hypothalamic paraventricular nucleus (PVN) may play a role via its descending projections to the intermediolateral horn of the spinal cord. Therefore, the consequences of PVN lesions (PVNx) on WAT mobilization or accumulation were tested. PVNx resulted in increased lipid accumulation, indicated by increases in retroperitoneal (RWAT) , epididymal (EWAT) , and inguinal WAT (IWAT) pad masses, in fed hamsters, but PVNx did not block fasting (56 h)-induced lipid mobilization. Because adrenal medullary catecholamines, especially epinephrine, also play a minor role in lipid mobilization, we tested the contribution of catecholamine release on lipid mobilization through adrenal demedullation (ADMEDx), with and without PVNx, and found fastinginduced lipid mobilization was not blocked. There was, however, a suggestion that distal denervation of IWAT, with and without ADMEDx, partially blocked lipid mobilization. In addition, evidence suggests SNS also may be an important controller of fat cell proliferation. Surgical denervation of WAT triggers increases in fat cell number (FCN), but have not determined if this FCN increase is due to preadipocyte proliferation or differentiation of preadipocytes into mature fat cells. We also have not demonstrated what role sensory innervation may have in regulating white adipocyte proliferation. Therefore, the role of WAT sympathetic or sensory innervation on adipocyte proliferation was tested. The SNS but not sensory denervation triggered bona fide proliferation as indicated by bromodeoxyuridine plus AD3, a specific adipocyte membrane protein, colabeling. These and previous data suggest that the SNS plays a role in regulating adiposity.

The solar minimum of 2009 has been identified as an exceptional event with regard to cosmic ray (CR)modulation, since conditions in the heliosphere have reached unprecedented quiet levels. This unique minimum has been observed by the Earth–orbiting satellite, PAMELA, launched in June, 2006, from which vast sets of accurate proton and electron preliminary observations have been made available. These simultaneous measurements from PAMELA provide the ideal opportunity to conduct an in–depth study of CR modulation, in particular charge–sign dependent modulation. In utilizing this opportunity, a three–dimensional, steady–state modulation model was used to reproduce a selection of consecutive PAMELA proton and electron spectra from 2006 to 2009. Thiswas done by assuming full drifts and simplified diffusion coefficients, where the rigidity dependence and absolute value of themean free paths for protons and electrons were sequentially adjusted below 3 GV and 300 MV, respectively. Care has been taken in calculating yearly–averaged current–sheet tilt angle and magnetic field values that correspond to the PAMELA spectra. Following this study where the numerical model was used to investigate the individual effects resulting from changes in the tilt angle, diffusion coefficients, and global drifts, it was found that all these modulation processes played significant roles in contributing to the total increase in CR intensities from 2006 to 2009, as was observed by PAMELA. Furthermore, the effect that drifts has on oppositely charged particles was also evident from the difference between the peak–shaped time profiles of protons and the flatter time profiles of electrons, as is expected for an A < 0 polarity cycle. Since protons, which drift into the heliosphere along the heliospheric current–sheet, haven’t yet reached maximum intensity levels by 2008, their intensities increased notably more than electrons toward the end of 2009. The time and energy dependence of the electron to proton ratios were also studied in order to further illustrate and quantify the effect of drifts during this remarkable solar minimum period. / Thesis (M.Com. (Industrial Sociology))--North-West University, Potchefstroom Campus, 2012.

The solar minimum of 2009 has been identified as an exceptional event with regard to cosmic ray (CR)modulation, since conditions in the heliosphere have reached unprecedented quiet levels. This unique minimum has been observed by the Earth–orbiting satellite, PAMELA, launched in June, 2006, from which vast sets of accurate proton and electron preliminary observations have been made available. These simultaneous measurements from PAMELA provide the ideal opportunity to conduct an in–depth study of CR modulation, in particular charge–sign dependent modulation. In utilizing this opportunity, a three–dimensional, steady–state modulation model was used to reproduce a selection of consecutive PAMELA proton and electron spectra from 2006 to 2009. Thiswas done by assuming full drifts and simplified diffusion coefficients, where the rigidity dependence and absolute value of themean free paths for protons and electrons were sequentially adjusted below 3 GV and 300 MV, respectively. Care has been taken in calculating yearly–averaged current–sheet tilt angle and magnetic field values that correspond to the PAMELA spectra. Following this study where the numerical model was used to investigate the individual effects resulting from changes in the tilt angle, diffusion coefficients, and global drifts, it was found that all these modulation processes played significant roles in contributing to the total increase in CR intensities from 2006 to 2009, as was observed by PAMELA. Furthermore, the effect that drifts has on oppositely charged particles was also evident from the difference between the peak–shaped time profiles of protons and the flatter time profiles of electrons, as is expected for an A < 0 polarity cycle. Since protons, which drift into the heliosphere along the heliospheric current–sheet, haven’t yet reached maximum intensity levels by 2008, their intensities increased notably more than electrons toward the end of 2009. The time and energy dependence of the electron to proton ratios were also studied in order to further illustrate and quantify the effect of drifts during this remarkable solar minimum period. / Thesis (M.Com. (Industrial Sociology))--North-West University, Potchefstroom Campus, 2012.

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Background: Research on nursing practice has highlighted a relationship between non-nursing tasks (NNTs), nursing tasks left undone (NTLU), and internationally it was found that these factors have an effect on job satisfaction. Since the last study done on NNTs and NTLU in 1988, much has changed in South Africa`s health system. Current South African studies have revealed that decreased numbers of PNs in South Africa experience satisfaction. Therefore, this study explores the relationship between NNTs, NTLU and job satisfaction on both individual PN level and unit level in South Africa, and contributes to the international debate. Aim: To investigate the relationship between NNTs, NTLU and job satisfaction among professional nurses (PNs) in medical and surgical units in private and public hospitals in South Africa. Method: A cross-sectional survey design was used including 1166 PNs in 60 medical and surgical units in 55 private hospitals and seven national referral hospitals in South Africa who completed the survey. Measures: Relationships between NNTs, NTLU, job satisfaction and aspects of job satisfaction. Results: The three main NNTs performed were filling-in for non-nursing services (d=0.47), cleaning patient’s rooms and equipment (d=0.48) and obtaining supplies and equipment (d=0.64). Nationally more than 50% of PNs reported the following NTLU – comfort/talk with patients (62.2%), educating patients and family (57.9%) and develop or update nursing care plans/pathways (51.6%). PNs in private hospitals are more satisfied with their jobs than PNs in public hospitals. PNs were most dissatisfied with the opportunities for advancement (M = 2.60) and educational opportunities (M=2.64) aspects of job satisfaction. At unit level, NTLU positively correlated with three NNTs, and job satisfaction correlated mostly and negatively with NTLU. Conclusion: South African PNs perform many NNTs. However, the performance of NNTs does not influence their job satisfaction to the extent the NTLU does. Although PNs in this study indicated that NNTs do not have a significant influence on NTLU, it may reveal a greater issue, in that PNs have grown accustomed to performing NNTs as part of their workload. Clarifying professional nurses’ scope of practice and increased use of support services may provide PNs with more time to conduct nursing tasks which should improve job satisfaction. Recommendations for practice, education, policy/orientation programmes and research are made from the findings of this study. / MCur, North-West University, Potchefstroom Campus, 2014