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Browsing Research Articles (University of Pretoria) by Author "Yadavalli, Venkata S. Sarma"
Now showing items 1-20 of 54
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Sharma, Rashi; Darbari, Jyoti Dhingra; Yadavalli, Venkata S. Sarma; Agarwal, Vernika; Jha, P.C. (Springer, 2020)In the current scenario, sustainability is asserting a profound effect on the global Food Supply Chain (FSC). It is driven primarily by growing consciousness of consumers who want healthy food and at the same time, they ...
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Wentzel, John Peter; Diatha, Krishna Sundar; Yadavalli, Venkata S. Sarma (Routledge, 2013-12)The last 10 years have seen a significant increase in the provision of consumer services through technology. Computers, mobile phones, the Internet and self-service kiosks are examples of technology platforms that have ...
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Yadavalli, Venkata S. Sarma; Vaidyanathan, V. S.; Chandrasekhar, P.; Abbas, S. (Taylor and Francis, 2017-03)Two-unit warm standby systems have been elaborately dealt within the literature. However, the study of standby systems with more than two units, though very relevant in state-of-the-art practical situations, has received ...
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Adetunji, Olufemi; Yadavalli, Venkata S. Sarma; Malada, Awelani (Southern African Institute for Industrial Engineering, 2013-05)Government institutions need to assess how well they meet the needs of their customers, and what their customers think about the quality of the services they provide. This is aligned with the ‘Batho Pele’ principle of the ...
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Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (MDPI Publishing, 2018)Energy Measurement and Verification (M&V) aims to make inferences about the savings achieved in energy projects, given the data and other information at hand. Traditionally, a frequentist approach has been used to quantify ...
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Mokilane, Paul; Debba, Pravesh; Yadavalli, Venkata S. Sarma; Sigauke, Caston (Natural Sciences Publishing, 2019-03)The paper presents an application of Bayesian structural time-series model to forecast long-term electricity demand. Accurate trend specification in long-term forecasting is important; otherwise erroneous forecasts could ...
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Mwanga, Y.A.; Joubert, Johan W.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2009-05)It is reasonable to expect that preparation time is needed to ready a repair facility before a repair can be carried out. A three-unit system with a `preparation time’ for the repair facility is studied in this paper. ...
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Yadavalli, Venkata S. Sarma; Claasen, S.J. (Schalk Johannes); Singh, N. (Southern African Institute for Industrial Engineering, 2003)In practice, there are many quality control situations where a product under consideration may have two or more interrelated quality characteristics and observations of each characteristic are serially correlated. One of ...
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Kruger, P.S. (Paul Stephanus), 1944-; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2018-11-09)Writing numbers for counting and record-keeping predates the art of writing by a considerable margin. Never in the history of humankind has the urge to count and to measure everything been so prevalent as today. Numbers ...
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Van Wyk, Estelle; Yadavalli, Venkata S. Sarma; Carstens, Herman (Springer, 2013)Somalia, a country situated in Eastern Africa has been struggling between rival warlords and an inability to deal with famine. Diseases have resulted to the deaths of up to millions of people. According to a New York Times ...
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Mokilane, Paul; Galpin, Jacky; Yadavalli, Venkata S. Sarma; Debba, Provesh; Koen, Renee; Sibiya, Siphamandla (University of Pretoria, Department of Economics, 2018-03-27)BACKGROUND : This study involves forecasting electricity demand for long-term planning purposes. Long-term forecasts for hourly electricity demands from 2006 to 2023 are done with in-sample forecasts from 2006 to 2012 ...
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Sankaraiah, G.; Sarma, B.D.; Umasankar, C.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2011)The reliability of a system is generally treated as a function of cost; but in many real-life situations reliability will depend on a variety of factors. It is therefore interesting to probe the hidden impact of constraints ...
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Adetunji, Olufemi; Yadavalli, Venkata S. Sarma; AlRikabi, Rafid; Makoena, Sebatjane (Taylor and Francis, 2020)Containerization has been said to be one of the most significant innovations of port management in the last century. Some ports usually tend to be more export driven while some others are import driven. This imbalance in ...
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Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma; Rajan, Arvind (Elsevier, 2017-09)A method is presented for reducing the required sample sizes for reporting energy savings with predetermined statistical accuracy in lighting retrofit measurement and verification projects, where the population of retrofitted ...
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Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (Elsevier, 2017-11)Measurement and Verification (M&V) is often required for energy efficiency or demand side management projects in buildings, to demonstrate that savings were in fact achieved. For projects where sampling has to be done, ...
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Boraine, H.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2003)Artificial neural networks are powerful tools for time series forecasting. The problem addressed in this article is to do multi-step prediction of a stationary time series, and to find the associated prediction limits. ...
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Yadavalli, Venkata S. Sarma; Karthikeyan, T.; Udayabaskaran, Swaminathan (South African Statistical Association, 2010-12)A mathematical model of a biological population, taking into account the effect of environmental in uences both on the life-time distribution and on the reproductive capacity of the individuals of the population, ...
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Kapur, P.K.; Gupta, A.; Yadavalli, Venkata S. Sarma; Claasen, S.J. (Schalk Johannes) (Southern African Institute for Industrial Engineering, 2006-11)Numerous Software Reliability Growth Models (SRGMs) have been discussed in the literature. These models are used to predict fault content and reliability of software. It has been observed that the relationship between ...
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Yadavalli, Venkata S. Sarma; Darbari, Jyoti Dhingra; Bhayana, Nidhi; Jha, P.C.; Agarwal, Vernika (Elsevier, 2019)Due to intensification of market competence and customers increasing socio-environmental concerns, sustainability has become a focal point for most organizations. Thus incorporation of customer sustainable expectations into ...
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Tshinangi, Kapya; Adetunji, Olufemi; Yadavalli, Venkata S. Sarma (Ram Arti Publishers, 2022-10)Conventional production systems assume that during the manufacturing processes, machines operate without breakdown over an infinite planning horizon and manufacture only products of good quality. Imperfect production ...
Now showing items 1-20 of 54