The wide variety of magazines in the South African market and the economic relapse that has been experienc,e d worldwide has given rise to the increasing competition for higher circulation figures and advertising income. This phenomenon especially occurs between publications competing for the same target audience, such as the women's magazines SARIE and rooi rose, competitors over many years in the Afrikaans magazine market. Magazine covers play a critical role in this rivalry due to the direct connection between the popularity of the cover and circulation figures. The more popular the cover of a publication, the higher the sales, circulation and potential profitability will be. Thus it is of the utmost importance for any publication to make the suitable cover selections, considering that the wrong choices can contribute towards a decrease in circulation and eventually fatal consequences for the publication. This study endeavours to determine which requirements magazine covers should meet to be successful and also which tendencies can be identified in the cover choices of SARIE and rooi rose and how these tendencies can be explained. In literature it was found that there are several requirements and directions to which magazine covers should account to be able to be achieving success. It was also found that magazine covers consist of several elements, such as the logo (master-head), cover-girl/-photo, background colours, text and also competitions (announced on the cover). SARIE and rooi rose's covers were analysed in accordance with the requirements for magazine covers. It was found that these magazine covers complied with the formal requirements formulated in the literature consulted. It also appeared that the success of every cover and edition is determined by the cover elements as a whole and not only the popularity of the "cover-girl" only. Several aspects should thus be taken into account when planning the magazine cover. It also appeared that although the cover choice sets an agenda for readers concerning the topics they will eventually be thinking about and discussing, another dimension of agenda-setting rather is to the point, namely the role readers' preferences play (through their personal feedback and buying of magazines) regarding editors' decision in respect of covers. / Thesis (M.A. (Communication Studies))--North-West University, Potchefstroom Campus, 2010

The wide variety of magazines in the South African market and the economic relapse that has been experienc,e d worldwide has given rise to the increasing competition for higher circulation figures and advertising income. This phenomenon especially occurs between publications competing for the same target audience, such as the women's magazines SARIE and rooi rose, competitors over many years in the Afrikaans magazine market. Magazine covers play a critical role in this rivalry due to the direct connection between the popularity of the cover and circulation figures. The more popular the cover of a publication, the higher the sales, circulation and potential profitability will be. Thus it is of the utmost importance for any publication to make the suitable cover selections, considering that the wrong choices can contribute towards a decrease in circulation and eventually fatal consequences for the publication. This study endeavours to determine which requirements magazine covers should meet to be successful and also which tendencies can be identified in the cover choices of SARIE and rooi rose and how these tendencies can be explained. In literature it was found that there are several requirements and directions to which magazine covers should account to be able to be achieving success. It was also found that magazine covers consist of several elements, such as the logo (master-head), cover-girl/-photo, background colours, text and also competitions (announced on the cover). SARIE and rooi rose's covers were analysed in accordance with the requirements for magazine covers. It was found that these magazine covers complied with the formal requirements formulated in the literature consulted. It also appeared that the success of every cover and edition is determined by the cover elements as a whole and not only the popularity of the "cover-girl" only. Several aspects should thus be taken into account when planning the magazine cover. It also appeared that although the cover choice sets an agenda for readers concerning the topics they will eventually be thinking about and discussing, another dimension of agenda-setting rather is to the point, namely the role readers' preferences play (through their personal feedback and buying of magazines) regarding editors' decision in respect of covers. / Thesis (M.A. (Communication Studies))--North-West University, Potchefstroom Campus, 2010

Water temperature, ice cover, and lake stratification are important physical properties of lakes and reservoirs that control mixing as well as bio-geo-chemical processes and thus influence the water quality. We used an ensemble of vertical onedimensional hydrodynamic lake models driven with regional climate projections to calculate water temperature, stratification, and ice cover under the A1B emission scenario for the German drinking water reservoir Lichtenberg. We used an analysis of variance method to estimate the contributions of the considered sources of uncertainty on the ensemble output. For all simulated variables, epistemic uncertainty, which is related to the model structure, is the dominant source throughout the simulation period. Nonetheless, the calculated trends are coherent among the five models and in line with historical observations. The ensemble predicts an increase in surface water temperature of 0.34 K per decade, a lengthening of the summer stratification of 3.2 days per decade, as well as decreased probabilities of the occurrence of ice cover and winter inverse stratification by 2100. These expected changes are likely to influence the water quality of the reservoir. Similar trends are to be expected in other reservoirs and lakes in comparable regions.