Browsing Statistics and Population Studies by Title
Now showing items 129-148 of 162
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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 ... -
Trauma and PTSD in prisons and corrections
(Elsevier, 2023)Post-traumatic stress disorder (PTSD), and particularly complex PTSD, is over-represented in prisons and corrections. In this interview with Jean-Pierre Bouchard, Thomas Fovet, Cle ́ ment Villa, Bettina Belet, Fanny ... -
Trends and risk factors for childhood diarrhea in sub-Saharan countries (1990 2013): assessing the neighborhood inequalities
(Co-Action Publishing, 2016)BACKGROUND: Diarrheal diseases are a major cause of child mortality and one of the main causes of medical consultation for children in sub-Saharan countries. This paper attempts to determine the risk factors and neighborhood ... -
Trends in HIV risk behaviour of incoming first-year students at a South African university: 2007–2012
(Taylor and Francis Group, 2015)The aim of the research on which this article is based was to understand the behavioural changes of the target student populationover time to ensure that future prevention programmes are more effective in changing behaviour. ... -
Tri-infection: Tuberculosis, HIV, COVID-19 and the already strained South African health system
(Elsevier, 2021)The 30th of May 2021 marks the latest significant national address, where President Cyril Ramaphosa moves the country back into level two lockdown with the hopes of curving the new COVID-19 surge while guarding an improving ... -
Two large amplitude slowly pulsating hot subdwarf stars
(Oxford University Press, 2011)The discovery observations of two new slowly pulsating subdwarf B stars (V1093 Her stars), BPS CS22890−74 and PB 7032, are presented. Both stars are highly multiperiodic, and have – for V1093 Her stars – large amplitudes. ... -
Two new pulsating hot subdwarf stars from the Edinburgh-Cape survey
(Oxford University Press, 2009)We report the discovery of very rapid pulsations in two hot subdwarf stars from the Edinburgh- Cape blue object survey. The short periods, small amplitudes and multiperiodicity establish these stars as members of the ... -
Two new variable sdB stars, HE 0218−3437 and LB 1516
(Oxford University Press, 2010)We present photometry which shows that two known hot subdwarf stars, HE 0218−3437 and LB 1516, are variable. LB 1516 exhibits several frequencies in the range 12–25 cycles d−1 (periods of about 1–2 h) with amplitudes ...