Browsing Research Articles (Statistics & Population Studies) by Title
Now showing items 122-141 of 162
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A re-assessment of the nearest neighbour alignment of the X-ray isophotes of galaxy clusters
(Oxford University Press, 2006)Alignment is defined as the tendency of the distribution of pointing angles between the major axes of clusters and their nearest neighbours to be more concentrated towards small values for small nearest neighbour distances, ... -
Reflecting on the current scenario and forecasting the future demand for medical doctors in South Africa up to 2030: towards equal representation of women
(Springer Nature, 2021)Increasing feminization of medical professions is well-acknowledged. However, this does not always equate to equitable representation of women within medicine, regarding their socio-demographic indicators, regions, sectors ... -
The relationship between client dissatisfaction and contraceptive discontinuation among urban family planning clients in three sub-Saharan African countries
(Public Library of Science, 2022)Although researchers and practitioners have suggested that the quality of family planning services impacts contraceptive discontinuation, establishing a causal relationship has been challenging, primarily due to data ... -
The relationship between household sanitation and women’s experience of menstrual hygiene: Findings from a cross-sectional survey in Kaduna State, Nigeria
(MDPI, 2018)Global efforts to improve sanitation have emphasized the needs of women and girls. Managing menstruation is one such need, yet there is scarce research capturing current practices. This study investigated the relationships ... -
Reproductive health situation in South Africa: Emerging policy issue
(SAGE Publications, 2018)South Africa is still lagging behind with health outcomes, especially when it comes to accessing treatment, prevention and care for reproductive health issues despite the significant progress made with regard to certain ... -
A review of the underlying factors influencing female genital mutilation in Africa
(Taylor & Francis, 2016)Female Genital Mutilation (FGM) is a re-occurring decimal in Africa. This phenomenon is estimated to occur in over twenty-five (25) countries in Africa. It is further estimated that FGM has been performed on nearly two ... -
Risk factors of inconsistent condom use among sexually active youths: Implications for human immunodeficiency virus and sexual risk behaviours in Malawi
(SAGE, 2017)This study examines the risk associated with inconsistent use of condoms as a risk factor for human immunodeficiency virus/sexually transmitted infections (HIV/STIs) and sexual risk behaviours. The Malawi Demographic ... -
School and work absenteeism due to menstruation in three West African countries: findings from PMA2020 surveys
(Taylor & Francis Open Access, 2021)Reports of school and work absences due to unmet menstrual needs have prompted increased attention to menstruation in policy and practice. However, there appear to be few quantitative studies reported in published ... -
A search for p-mode pulsations in white dwarf stars using the Berkeley Visible Imaging Tube detector
(Oxford University Press, 2014)We present high-speed photometry (resolution 0.1 s) obtained during the commissioning of the Berkely Visible Imaging Tube system on the Southern African Large Telescope (SALT). The observations were an attempt to search ... -
Simulation of Y-chromosomal haplotype data
(Elsevier, 2010)The non-recombining nature of the Y-chromosome determines the non-independence of alleles between loci. The evolution of short tandem repeat (STR) loci in the Y-chromosome is the result of different factors such as ... -
Son preference and contraceptive practice among tribal groups in rural South India
(Kamla-Raj Enterprises, 2006)This paper examines the son preference and contraceptive practice among tribal groups in rural south India. Parents’ preferences for the sex of their children have constituted an important theme in population and social ... -
South Africa: Challenges and successes of the COVID-19 lockdown
(Elsevier, 2020)At the beginning of March 2020, South Africa (59 million inhabitants) was hit by the pandemic of COVID-19 and soon became the most affected country in Africa by the SARS-CoV-2 virus. From one single case on March 5th, the ... -
Spectroscopy of the variable K-dwarf UNSW-V-760: is it a pre-main-sequence pulsator?
(Oxford University Press, 2013)The star UNSW-V-760 is a known variable, showing both flares and two non-sinusoidal periodicities. Availability of high signal-to-noise spectra reported in this paper has enabled a revision of the spectral type of this ... -
Sport, sex and age increase risk of illness at the Rio 2016 Summer Paralympic Games: a prospective cohort study of 51 198 athlete days
(BMJ, 2018)OBJECTIVETo describe the epidemiology of illness at the Rio 2016 Summer Paralympic Games. METHODS A total of 3657 athletes from 78 countries, representing 83.5% of all athletes at the Games, were monitored on the ... -
Starspot modelling of the TESS light curve of CVSO 30
(EDP Sciences, 2021)Aims. I aim to investigate whether the photometric variability in the candidate host star CVSO 30 can be explained by starspots. Methods. The Transiting Exoplanet Survey Satellite (TESS) light curve of CVSO 30 is separated ... -
Statistical tests for changes in the amplitude, frequency or phase of a sinusoidal variation
(Oxford University Press, 2009)The problem considered is that of testing for small changes over time in the properties of a sinusoidal signal contaminated by noise. Two test statistics are proposed. The first is a frequency domain statistic based on ... -
Symptom number and reduced preinfection training predict prolonged return to training after sars-cov-2 in athletes: Aware IV
(Lippincott, Williams & Wilkins, 2023)Symptom Number and Reduced Preinfection Training Predict Prolonged Return to Training after SARS-CoV-2 in Athletes: AWARE IV. Med. Sci. Sports Exerc., Vol. 55, No. 1, pp. 1-8, 2023. Purpose: This study aimed to ... -
Tackling sport-related concussion: Effectiveness of lowering the maximum legal height of the tackle in amateur male rugby - A cross-sectional analytical study
(BMJ Publishing Group, 2023)Objective Rugby union ( € rugby') is popular globally, with most of its participants being amateur. Concern regarding sport-related concussion (SRC) sustained during rugby is increasing. SRC occurs most frequently in the ... -
Time series models of three sets of RXTE Observations of 4U 1543-47
(Oxford University Press, 2013)The X-ray nova 4U 1543−47 was in a different physical state (low/hard, high/soft, and very high) during the acquisition of each of the three time series analyzed in this paper. Standard time series models of the ... -
Time series photometry of the nearby brown dwarf DENIS-P J0041353-562112
(Oxford University Press, 2011)DENIS-P J0041353−562112 is a brown dwarf, with a spectral type of M7.5, which may be younger than 20 Myr. On the basis of its Hα emission-line asymmetry, it has been suggested that the object is accreting material. If ...