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On the model for U Geminorum
Published 2016“…The term cataclysmic variable comprises several types of variable star - novae, recurrent novae, dwarf novae; and to these we add the nova-like variables, stars which exhibit many of the characteristics of the novae but which have not been observed to erupt. …”
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Extensions to the data reconciliation procedure
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Determinants of house prices in Hout Bay
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Steam system heat exchanger network optimisation using degenerate solutions : a focus on pressure drop and boiler efficiency
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A stochastic model for daily climate
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Comparison of approaches for spatial interpolation of weather data on a specific date
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Life history traits of South African Encephalartos spp. (Zamiaceae) and their implications for understanding population structure, responses to threats and effective conservation a...
Published 2016“…An analysis of environmental variables for 193 populations of species in all groups, including maximum and minimum temperatures, mean annual precipitation, moisture index, rainfall co-efficient of variation and fire return frequency, showed that the means per group were not significantly different from each other for most of the variables. …”
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
Published 2024“…Presently, the well established condition monitoring techniques are based on steadystate analysis of various diagnostic variables (i.e. current, voltage, power, etc.). These steadystate techniques are currently being applied to most machine-related applications, however it is well known that machine diagnostic variables behave typically as non-stationary signals. …”
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
Published 2026“…Presently, the well-established condition monitoring techniques are based on steady-state analysis of various diagnostic variables (i.e. current, voltage, power, etc.). These steady-state techniques are currently being applied to most machine-related applications, however it is well known that machine diagnostic variables behave typically as non-stationary signals. …”
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Read, write, develop: The social and economic impact of literacy in South Africa
Published 2020“…When the crime rate was analysed as the dependent variable, the results showed a positive correlation with literacy in the absence of unobserved variables and a negative correlation with literacy when unobserved variables were included. …”
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Impact of conservation agriculture on smallholder farmer livelihoods in Kenya and Zimbabwe
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The Measurement & Verification of Energy Conservation Measures at a Coal-fired Power Plant
Published 2022“…An important finding was that the performance changes could not be solely attributed to the exclusion of any independent variables from the baseline adjustment model (e.g. ambient conditions). …”
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Development of a low phase noise microwave voltage controlled oscillator
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Psychosocial predictors of HIV treatment outcomes among young pregnant and postpartum women living with HIV
Published 2023“…Each psychosocial risk factor threshold met scored the participant one point on psychosocial burden such that the minimum score was zero and the maximum was four. The prevalence of each exposure variable was analyzed using descriptive statistics and associations between them and with the outcome variables (engagement in care and HIV viral load <50 copies/mL) were examined using Chi2 tests and Fischer exact tests for sparse data. …”
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The Verification of different model configurations of the Unified Atmospheric Model over South Africa
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Assessing conservation of a tropical African estuary : waterbird disturbance, livelihoods, and ecotourism
Published 2015“…Disturbance response metrics were estimated from these variables by calculating normalized mean residuals from regressions of density (D40) and minimum approach distance against expected densities measured in the absence of disturbance, for 14 waterbird species.…”
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Oxygen deprivation state as a marker for the severity of obstructive sleep apnea
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Modeling students’ academic performance using artificial neural network
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Effect of Liquidity Management on Profitability of Commercial Banks in Nigeria
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