Impact of headaches on university students in Durban, South Africa

BACKGROUND: Introspection into the factors that affect student success at higher education institutions has gained significant momentum in recent years. Teaching and learning has come under the spotlight with quality enhancement and teaching development funding focussing on student support, enhancing the student environment, and enhancing academics as teachers. Included in this are aspects that try to understand the student. An aspect that is not receiving attention is student health, specifically headaches which could impact student success. The aim of this study was to investigate the impact of primary headaches on student academic, family and social life at one higher education institution in South Africa. METHOD: Data was collected using a questionnaire based descriptive cross sectional survey. Multistage sampling using a ballot method allowed for sampling to obtain representation from across the institution. To achieve a 95 % confidence level, 384 students from across the university were invited to participate after informed consent. Data was analysed using Chi square tests at a probability of p < 0.05. RESULTS: Majority of the participants were undergraduates and non-smokers. Half of the population suffered from primary headaches. Headache sufferers experienced limited concentration due to an increased headache intensity during tests and/or the examination period. This negatively impacted on studying which was aggravated by consumption of caffeinated energy drinks, coffee and chocolate resulting in a less effective study session. Activities of daily living and participation in social events which usually leads to relaxation were neglected. Personal and emotional well-being was also negatively affected. Altered sleeping patterns and absence of study breaks also led to headaches. CONCLUSION: Headaches were found to impact on the students study and sleep patterns, their attention levels during lectures and their social and emotional life. Headaches negatively impacted on some participants leading to reduced focus on academic, family, social or leisure activities. Intensity of headaches increased during tests and examinations which could impact their success at University

An analysis of malware evasion techniques against modern AV engines

This research empirically tested the response of antivirus applications to binaries that use virus-like evasion techniques. In order to achieve this, a number of binaries are processed using a number of evasion methods and are then deployed against several antivirus engines. The research also documents the process of setting up an environment for testing antivirus engines, including building the evasion techniques used in the tests. The results of the empirical tests illustrate that an attacker can evade multiple antivirus engines without much effort using well-known evasion techniques. Furthermore, some antivirus engines may respond to the occurrence of an evasion technique instead of the presence of any malicious code. In practical terms, this shows that while antivirus applications are useful for protecting against known threats, their effectiveness against unknown or modified threats is limited

Development of a process modelling methodology and condition monitoring platform for air-cooled condensers

Air-cooled condensers (ACCs) are a type of dry-cooling technology that has seen an increase in implementation globally, particularly in the power generation industry, due to its low water consumption. Unfortunately, ACC performance is susceptible to changing ambient conditions, such as dry bulb temperatures, wind direction, and wind speeds. This can result in performance reduction under adverse ambient conditions, which leads to increased turbine back pressures and in turn, a decrease in generated electricity. Therefore, this creates a demand to monitor and predict ACC performance under changing ambient conditions. This study focuses on modelling a utility-scale ACC system at steady-state conditions applying a 1-D network modelling approach and using a component-level discretization approach. This approach allowed for each cell to be modelled individually, accounting for steam duct supply behaviour, and for off-design conditions to be investigated. The developed methodology was based on existing empirical correlations for condenser cells and adapted to model double-row dephlegmators. A utility-scale 64-cell ACC system based in South Africa was selected for this study. The thermofluid network model was validated using site data with agreement in results within 1%; however, due to a lack of site data, the model was not validated for off-design conditions. The thermofluid network model was also compared to the existing lumped approach and differences were observed due to the steam ducting distribution. The effect of increasing ambient air temperature from 25 35 − C C was investigated, with a heat rejection rate decrease of 10.9 MW and a backpressure increase of 7.79 kPa across the temperature range. Condensers' heat rejection rate decreased with higher air temperatures, while dephlegmators' heat rejection rate increased due to the increased outlet vapour pressure and flow rates from condensers. Off-design conditions were simulated, including hot air recirculation and wind effects. For wind effects, the developed model predicted a decrease in heat rejection rate of 1.7 MW for higher wind speeds, while the lumped approach predicted an increase of 4.9 . MW For practicality, a data-driven surrogate model was developed through machine learning techniques using data generated by the thermofluid network model. The surrogate model predicted systemlevel ACC performance indicators such as turbine backpressure and total heat rejection rate. Multilayer perceptron neural networks were developed in the form of a regression network and binary classifier network. For the test sets, the regression network had an average relative error of 0.3%, while the binary classifier had a 99.85% classification accuracy. The surrogate model was validated to site data over a 3 week operating period, with 93.5% of backpressure predictions within 6% of site data backpressures. The surrogate model was deployed through a web-application prototype which included a forecasting tool to predict ACC performance based on a weather forecast

Supporting rape survivors to adhere to post-exposure prophylaxis (PEP) to prevent HIV infection: The importance of psychosocial counselling and support

Eleven years after it was first mooted in 1996, the Criminal Law (Sexual Offences and Related Matters) Amendment Act (32 of 2007) came into effect in December 2007. Law-makers proudly lauded sections 28 and 29 of the Act, which set out how post-exposure prophylaxis (PEP) to prevent HIV infection should be made available to rape survivors.* These clauses are, however, neither particularly novel nor innovative, Cabinet having already approved (in April 2002) the provision of antiretroviral drugs to prevent HIV infection following rape. Subsequent to Cabinet's decision, a few studies were conducted examining various facets of providing PEP as part of a health response to rape.1-4 In theory, these findings should have provided legislators with some insight into what was required by rape survivors from a PEP service, particularly in relation to psycho-social support. This was not the case, as we will show in this article, which draws on unpublished findings from 67 interviews with rape survivors† exploring their adherence to PEP. Southern African Journal of HIV Medicine Vol. 9 (3) 2008: pp.24-2

Nutritional support of the hospitalized patient Part I. Background, methodology and techniques

The technique of parenteral nutrition is available at most hospitals in the RSA, and can be administered successfully by medical staff if the advice provided here is followed in an obsessional way. Close cooperation between nurses, physicians, surgeons and pharmacists 'is the key to success, and the development of a 'team approach' cannot be underemphasized

Testosterone depot injection in male hypogonadism: a critical appraisal

Testosterone compounds have been available for almost 70 years, but the pharmaceutical formulations have been less than ideal. Traditionally, injectable testosterone esters have been used for treatment, but they generate supranormal testosterone levels shortly after the 2- to 3-weekly injection interval and then testosterone levels decline very rapidly, becoming subnormal in the days before the next injection. The rapid fluctuations in plasma testosterone are subjectively experienced as disagreeable. Testosterone undecanoate is a new injectable testosterone preparation with a considerably better pharmacokinetic profile. After 2 initial injections with a 6-week interval, the following intervals between two injections are almost always 12-weeks, amounting eventually to a total of 4 injections per year. Plasma testosterone levels with this preparation are nearly always in the range of normal men, so are its metabolic products estradiol and dihydrotestosterone. The “roller coaster” effects of traditional parenteral testosterone injections are not apparent. It reverses the effects of hypogonadism on bone and muscle and metabolic parameters and on sexual functions. Its safety profile is excellent due to the continuous normalcy of plasma testosterone levels. No polycythemia has been observed, and no adverse effects on lipid profiles. Prostate safety parameters are well within reference limits. There was no impairment of uroflow. Testosterone undecanoate is a valuable contribution to the treatment options of androgen deficiency

Evaluation of an integrated asset life-cycle management (ALCM) model and assessment of practices in the water utility sector

The water utility sector in South Africa is presently facing numerous challenges. Amongst the most urgent and important priorities is ageing infrastructure, which has the potential to end in failures with detrimental impacts on local communities and the natural environment. Furthermore, to manage the majority of strategic assets in terms of total performance, i.e. environmental, financial, social and technical, is often difficult as a large portion of assets, such as buried pipelines, cannot be easily accessed. These issues highlight the need for a generic asset life-cycle management model for the water utility sector. Such an integrated model is introduced; it was evaluated in the largest water utility in South Africa. Although it was found to have relevance, practicability, applicability, and usability, the model still needs rigorous testing amongst other water utilities in South Africa, and in other countries. The perceptions of the water utility sector were also assessed in terms of the practices of the principles of integrated life-cycle asset management. The results indicate a fairly good understanding of the concept of asset life-cycle management, but allude to challenges with fully implementing all the principles when it comes to asset performance measurements; particular attention must be given to develop mechanisms to measure environmental and social aspects. Nevertheless, it is highlighted that for strategic assets, the practices and principles of ALCM have many benefits, including better maintenance management, infrastructural planning, risk management, and sustainable development.Keywords: life-cycle management, asset management, sustainable development, South Afric

Origine sociale et comportement politique

Les conséquences politiques de la mobilité sociale intergénérationnelle sur les comportements et les attitudes politiques des individus ont fait l'objet, depuis une vingtaine d'années, d'une série de recherches en particulier aux Etats-Unis et en Angleterre. A la suite de ces travaux une conclusion majeure semble s'imposer : les « mobiles sociaux » adopteraient un comportement politique intermédiaire entre leur groupe d'origine et leur groupe d'arrivée. Dans cette recherche, qui se fonde sur l'analyse d'un échantillon représentatif de cadres moyens et supérieurs, l'origine sociale paraît effectivement déterminer pour partie les comportements et attitudes politiques des individus appartenant aux couches moyennes salariées. Toutefois, une étude plus précise de ce mécanisme montre que l'effet de l'origine sociale sur le comportement et les attitudes politiques n'est pas seulement fonction de la distance entre la position sociale du père et celle du fils mais se diversifie également selon la nature et les conditions du trajet social effectué par l'individu.The political consequences of intergenerational social mobility on individuals' political attitudes and behavior have been studied in a series of inquiries over the past twenty years, especially in the United States and England. As a result of this work, it seems that one major conclusion may be drawn: the "socially mobile" seem to adopt a political behavior which is intermediate to that of the group from which they started out and that into which they are arriving. In this study based on a representative sample of middle — and upper — level executives, social origin indeed seems to be in part a determining factor in the political behavior and attitudes of individuals belonging to the middle range of the wage scale. However, a closer study of this mechanism shows that the effect of social origin upon political behavior and attitudes is not only a function of the distance between the father's and the son's social positions, but also differs according to the nature and conditions of the individual's social ascension

100 DAYS OF COVID-19: RISK FACTORS AND CONFIRMED CASES IN 19 AFRICAN COUNTRIES.

Background: The trail of the transmission of COVID-19 in Africa needs to be understood and conceptualized. With the limited response time to curb the transmission, the pandemic is already in 52 countries in Africa. There is much anxiety about the devastating potential of this scourge in Africa, justifiably so because of the weak health systems, high levels of poverty, and overcrowded cities. Therefore, this report examined the association between the confirmed cases at 100 days of COVID-19 and some significant risk factors in 19 African countries that had at least 100 confirmed cases as of 09/04/2020. Methods: In this report, we evaluated four major risk factors associated with COVID-19 confirmed cases in 19 African counties with over 100 cases in 100 days after the official declaration of COVID-19 by WHO. Results: Three of the four risk factors (total population in urban areas, population age, and international exposure) correlated positively. In contrast, one (public health system) correlated negatively with the confirmed cases in the countries under study. International exposure was initially the main transmitter, but community transmission now becomes the driver of COVID-19 infections on the continent. Conclusion: Identification of confirmed cases, quick contact tracing with self-isolation, community engagement, and health systems measures are all-necessary to prevent the potentially harmful ramifications of an epidemic on the continent. There is, therefore, the need for a comprehensive and integrated approach between the government and society