Exploring effective decision-making of principals in secondary schools in the Free State province

In a democratic South Africa, a variety of factors are necessary to ensure effective school governance and management. One of these factors is shared decision-making (SDM). SDM is a process of making decisions in a collaborative manner at the school level. Those responsible for implementing a decision must be actively and legitimately involved in making the decision. In South African schools today, SDM is no longer an option. The new framework of SDM is embedded in the South African Schools Act (Act 84 of 1996). According to the Act, parents, learners and teachers should be given the opportunity of participating in decisions on educational matters. In this study, the researcher set out to investigate and explore effective decision-making of secondary school principals in the Thabo Mofutsanayana Education District (THMOED) of the Free State Province. In an endeavour to realize that end, an open-ended questionnaire, individual and focus group interviews were used to collect data. The main aim was to find out how teachers, learners, parents and principals experienced decision-making in their schools. The main findings of this research were that, decisions-making practices in the secondary schools in the THMOED still adhered to pre-democratic formal lines of authority. In other words, the locus of control and decision-making powers resided mainly with the principals, with minimum participation of other stakeholders. Consequently, there were dissatisfactions and concerns raised by the participants. The concerns were directed at the management and included lack of communication, lack of transparency, unacceptable disciplinary procedures, autocratic leadership styles and centralized decision-making. According to the findings, it would appear that democratic models of governance were insufficiently used or overlooked by the principals. Concerns raised by the respondents were a clear indication that much needed to be done to change the mind-set of the principals.Educational StudiesD.Ed (Education Management

Characterisation of selected volatile organic compounds in Rwandan indigenous beer ‘Urwagwa’ by dynamic headspace gas chromatography-mass spectrometry

The volatile organic compound profile of alcoholic beverages consists of a wide range of compounds, comprising of acids, alcohols, esters, aldehydes, and other trace level aroma compounds. These compounds play an important role as they provide relative information on the product quality and enhance product acceptability. In this study, two brands of commercially available traditional banana beer samples were collected from a local market in Kigali, Rwanda; and were analyzed for volatile organic compounds. Dynamic headspace, using gas chromatography-mass spectrometry (DHS/GCMS), was used to identify volatile compounds at three different temperatures. Fifty volatile compounds, inclusive of 14 acids, 14 alcohols, and 22 esters were identified and quantified in the two brands of indigenous banana beer samples. Only 12 volatile components (three alcohols, three acids and six esters) were common in all banana beer samples. Among all the identified compounds, ethanol and acetate were the dominant compounds in all beer samples. Ethanol levels were found to be 8.7 and 18.1% (v/v) for brand A and B, respectively using gas chromatography (GC). The two major toxic compounds, methyl alcohol and ethyl carbamate/urethane, were detected in lower concentration levels compared to other identified compounds, thus suggesting negligible risk.Keywords: Indigenous banana beer, volatile compounds, dynamic headspace, gas chromatography-mass spectrometry (GC-MS), ‘Urgwagwa’African Journal of Biotechnology Vol. 12(20), pp. 2990-299

Investigation of groundwater salinity using geophysical and geochemical approaches: Heuningnes catchment coastal aquifer. Western Cape Province, South Africa

Seawater intrusion is recognised as a major factor affecting the quality of groundwater in coastal aquifers around the world. To determine the occurrence and extent of saline groundwater intrusion prevailing in the Heuningnes Catchment, a 2D resistivity imaging survey was carried out in three sites within the catchment. Eleven resistivity profile lines were conducted using the multi-electrode ABEM SAS resistivity meter system, employing the Wenner Array to map the extent of saline groundwater. A 2D resistivity image was acquired for these resistivity profile lines and the data were processed using Res2DINV software to produce the 2D inverse resistivity models. The interpretation of the resistivity models revealed three resistivity zones. The first zone is characterised by low resistivity (1–3 Ω.m); this represents an aquifer filled with saline water. The second resistivity zone has values ranging from (3–30 Ω.m); this represents a brackish saturated formation. The third resistivity zone denotes a sandy layer/sandstone saturated with freshwater having high resistivity values above 30 Ω.m. Geochemical analysis results of water samples at 11 locations along the electrical resistivity profile lines also suggest high salinity, indicated by high levels of Cl−, Na+, Total Dissolved Solids, and Electrical Conductivity

Training and development impact on job satisfaction, loyalty and retention among academics

Orientation: Extreme competition among institutions of higher learning was one of the difficulties that universities of technology (UoTs) had to overcome in order to enter the higher education system. This study examined the influence of training and development on job satisfaction, loyalty and retention among academic staff at a selected university of technology. Research purpose: The study investigated how training and development impact job satisfaction, loyalty and retention among academics. Motivation for the study: The competitive nature of the academic sector inspired universities to strive to attract and retain talented faculty members. Training and development programmes are considered potential tools to enhance job satisfaction, loyalty and retention, but empirical evidence is needed to support this relationship. Research approach/design and method: This study used a quantitative research methodology with a non-probability convenience sample (n = 270) of academics within the selected university utilising self-administered structured questionnaires to collect data. Main findings: The regression analysis revealed positive significant predictive relationships between training and development programmes and job satisfaction, loyalty and retention among academic staff. Practical/managerial implications: Findings imply that universities should prioritise the development of tailored training initiatives that address the specific needs and aspirations of their academic staff. Training interventions can foster a positive work environment and enhance staff members’ commitment and long-term engagement, ultimately improving the overall quality and reputation of the institution. Contribution/value-add: The study provided evidence-based insights to inform policies related to training and development programmes for both academics and institutions of higher education administrators

Fabrication of AgCu/TiO2 nanoparticle-based sensors for selective detection of xylene vapor

The design and fabrication of innovative nanostructured materials that could display improved sensitivity, selectivity, and rapid response/recovery characteristics still present significant scientific challenges. Herein we report the timely selective detection of xylene vapour in benzene, toluene, ethylbenzene (BTE) and acetone vapours at low operating temperatures using an n-type AgCu/TiO2 nanoparticlebased sensor. Switching from p-type to n-type conductivity was observed at higher AgCu loadings. The findings showed that sensor switching was not temperature- or gas-dependent. Among the AgCu loaded on TiO2 nanoparticles, n-type 0.5% AgCu loaded on TiO2 displayed a remarkable response (Rg/Ra E 33.2) toward xylene vapour at 150 1C. The sensor exhibited superior selectivity

The effect of HIV infection on the surgical, chemo- and radiotherapy management of breast cancer. A prospective cohort study

INTRODUCTION : Breast cancer is the most common cancer of women in the world. Twenty-five percent of people living with the human immunodeficiency virus (HIV) reside in South Africa. The coincidence of breast cancer and HIV infection is therefore common in South Africa. There is a perception that systemic and local surgical complications are more common in HIV-infected patients, and that these patients tolerate chemo- and radiotherapy poorly. AIM : The aim of the study was to determine the effect of HIV infection on the management of breast cancer by comparing HIV-infected to -noninfected patients. The outcomes of surgery and adjuvant/neoadjuvant therapy were examined in these groups. METHOD : The study was performed at the Steve Biko Academic Hospital, Pretoria, South Africa, during 2009-2014. Patients scheduled for surgery for breast cancer were recruited prospectively and their HIV status was determined. All patients were managed according to standard guidelines for breast cancer. Patients were followed up for 30 days and local and systemic surgical complications documented. Completion or non-completion of courses of chemo- and radiotherapy, and reasons for non-completion were documented. HIV-infected and -noninfected patients respectively were grouped, and compared statistically. RESULTS : One hundred and sixty patients (31 HIV-infected) were included. The frequency of surgical complications did not differ significantly between HIV-noninfected and infected patients (p = 0.08), more occurring in the HIV-noninfected patients. The risk ratio of HIV infection for surgical complications was 0.20 and the odds ratio 0.23. The completion of courses of chemo- and radiotherapy did not differ between the HIV-infected and -noninfected patients. Twenty-five of 27 HIV-infected patients (93%) and 100 of 113 HIV-noninfected patients (94%) completed their courses of chemotherapy (p = 0.68). Twelve of 14 HIV-infected patients (86%) and 40 of 41 HIV-noninfected patients (98%) completed their courses of radiotherapy (p = 0.16). CONCLUSION : These results suggest that HIV-infected patients with breast cancer do not experience more treatment-related complications and can be treated according to standard guidelines.http://www.journals.elsevier.com/international-journal-of-surgery/2017-10-31hb2016Surger

Enhanced upconversion emission of Er3+-Yb3+ co-doped Ba5 (PO4) 3OH powder phosphor for application in photodynamic therapy

Er3+-Yb3+ co-doped Ba5(PO4)3OH nanoparticle powder phosphors were successfully synthesized by urea combustion method. The resulting powder phosphors were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), high resolution scanning electron microscopy (HRSEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy (PL). XRD data confirmed crystallization of pure hexagonal phase of Ba5(PO4)3OH and HRSEM images showed formation of ellipsoidal particles. XPS data combined with EDS analysis confirmed the materials composition that corresponds with identification of all the chemical elements constituting the materials. The in vitro dark cytotoxicity of the particles confirmed lack of cytocidal behaviour in the absence of light, but considerable photodynamic therapy (PDT) activity was observed upon illumination. Upon excitation using a 980 nm laser, multiple emission peaks in the green and red regions corresponding to the optical transitions of Er3+ ion were observed. Upon co-doping with Yb3+, upconverted red emission was detected and this was attributable to non-radiative energy transfer from Yb3+ to Er3+. The proposed mechanism of upconversion photoluminescence is discussed

#FeesMustFall2016: Perceived and measured effect on clinical medical students

Background. Medical students are under immense academic stress. Campus unrest can contribute to stress and influence academic performance, social behaviour, emotional stability and financial expenses.Objectives. To investigate the effects of #FeesMustFall2016 (#FMF2016) on the 2016 3rd-year (semester 6) clinical medical students at the University of the Free State (UFS), Bloemfontein, South Africa.Methods. In phase 1 of the project, anonymous questionnaires were completed by the clinical students who experienced physical test disruption during #FMF2016. Opinions regarding academic performance, financial expenses, behaviour changes and stress levels were gathered. The students also completed a formal post-traumatic stress screening assessment. In phase 2 of the project, the academic performance of these students was compared with that of students not affected by #FMF2016.Results. Of the target population of 138 students, 87.0% completed the questionnaires. Three-quarters of the respondents reported a negative effect on academic performance, and most did not believe that the delivering of lectures on Blackboard was a good way of training. Alcohol consumption increased in 31.9% of the students. Criteria for post-traumatic stress disorder (PTSD) were met in 12.7% of students. Compared with previous and later cohorts of students there were no clear differences regarding marks, but there was a tendency towards poorer performance and more failures the next year.Conclusions. Semester 6 medical students at UFS reported that the #FMF2016 protests had a negative effect on academic, social, financial and stress aspects. PTSD was present in 12.7% of students compared with 7.8% in similar populations.

“COMING TOGETHER” (Batanai): Learning from Zimbabwe’s experiences with community biodiversity conservation, participatory crop improvement and climate change adaptation

This brief presents the findings and lessons learned of a study tour by a team from the Department of Agriculture, Forestry and Fisheries of South Africa to neighbouring Zimbabwe, to learn about the roles of Farmer Field Schools, functions and operations of community seedbanks and various forms of participatory crop improvement, promoted by the Community Technology Development Organisation of Zimbabwe