Browsing by Author "Yadavalli, Venkata S. Sarma"

Browsing by Author "Yadavalli, Venkata S. Sarma"

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  • Wentzel, John Peter; Diatha, Krishna Sundar; Yadavalli, Venkata S. Sarma (Routledge, 2016-02)
    Financial exclusion has been shown to have negative socioeconomic effects on citizens, especially at the bottom of the economic pyramid. South Africa suffers from high levels of financial exclusion, disproportionately ...
  • Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (Elsevier, 2017-02)
    Energy meters need to be calibrated for use in Measurement and Verification (M&V) projects. However, calibration can be prohibitively expensive and a ect project feasibility negatively. This study presents a novel low-cost ...
  • Grobler, Jacomine; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2008-11)
    This paper documents the results of a supply chain management (SCM) case study conducted at Centurion Ice Cream and Sweets CC, a producer of ice cream in the greater Gauteng area. The current SCM environment was first ...
  • Thaga, K.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2007-11)
    This paper proposes an exponentially weighted moving average (EWMA) control chart that is capable of detecting changes in both process mean and standard deviation for autocorrelated data (referred to as the Maximum ...
  • Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (Elsevier, 2018-03)
    Measurement uncertainty is a key component in the overall uncertainty calculation for Measurement and Verification (M&V) projects. However, in some cases, it is reduced to outlier detection or basic uncertainty propagation ...
  • Grobler, Jacomine; Engelbrecht, Andries P.; Kok, Schalk; Yadavalli, Venkata S. Sarma (Springer, 2009-01)
    This paper investigates the application of particle swarm optimization (PSO) to the multi-objective flexible job shop scheduling problem with sequence-dependent set-up times, auxiliary resources and machine down time. To ...
  • Bhatt, Navneet; Anand, Adarsh; Yadavalli, Venkata S. Sarma; Kumar, Vijay (IJMEMS, India, 2017)
    With the association of software security assurance in the development of code based systems; software developers are relying on the Vulnerability discovery models to mitigate the breaches by estimating the total number ...
  • Van Wyk, Estelle; Bean, W.L.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2011-05)
    Natural disasters - and even those caused by people - are largely unpredictable. So disasters need to be researched and their impact fully understood, so that the aid supplies required to ensure survival during and after ...
  • Yadavalli, Venkata S. Sarma; Labeodan, Moremi Morire OreOluwapo; Udayabaskaran, Swaminathan; Forche, N. (Operations Research Society of SA, 2010-08)
    The T4 cell count, which is considered one of the markers of disease progression in an HIV infected individual, is modelled in this paper. The World Health Organisation has recently advocated that countries encourage HIV ...
  • Darbari, Jyoti D.; Agarwal, Vernika; Yadavalli, Venkata S. Sarma; Galar, Diego; Jha, Prakash C. (AOSIS Open Journals, 2017-03-27)
    BACKGROUND : Designing and implementation of reverse logistics (RL) network which meets the sustainability targets have been a matter of emerging concern for the electronics companies in India. OBJECTIVES : The present ...
  • Vanderperre, E.J.; Yadavalli, Venkata S. Sarma; Makhanov, S.S. (Southern African Institute for Industrial Engineering, 2004)
    Gaver’s parallel system (and its variants) has received considerable attention in the literature. The Laplace-transform (LT) of the survival function, corresponding to the underlying systems, has been derived by various ...
  • Anand, Adarsh; Das, Subhrata; Agarwal, Mohini; Yadavalli, Venkata S. Sarma (ITB Journal Publisher, 2019)
    Many reliability growth models related to the concept of multi upgradation have recently been proposed. This concept has helped software developers to develop a competitive edge over competitors by regularly introducing ...
  • Yadavalli, Venkata S. Sarma; Van Schoor, Christiaan de Wet (Southern African Institute for Industrial Engineering, 2004)
    A model of a perishable product inventory system operating in a random environment is studied. For the sake of simplicity, the stochastic environment is considered to alternate randomly over time between two states 0 and ...
  • Kruger, P.S. (Paul Stephanus), 1944-; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2017-08-31)
    The concept of Benford’s law, also known as the first-digit phenomenon, has been known to mathematicians since 1881. It is counter-intuitive, difficult to explain in simple terms, and has suffered from being described ...
  • Kruger, P.S. (Paul Stephanus), 1944-; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2016-12-06)
    Uncertainty is ever-present and is an integral part of life. Recognising the existence of uncertainty and its possible effects on decision-making may be important for the profitability, financial success, or even survival ...
  • Yadavalli, Venkata S. Sarma; Malada, Awelani; Charles, V. (Academy of Science of South Africa, 2007-11)
    This paper addresses the chance constraints reliability stochastic optimization (CCRSO) problem, for which the objective is to maximize system reliability for the given chance constraints. A method is illustrated to determine ...
  • Kapur, P.K.; Anand, Sameer; Yamada, Shigeru; Yadavalli, Venkata S. Sarma (Hindawi, 2009)
    Several software reliability growth models (SRGMs) have been developed by software developers in tracking and measuring the growth of reliability. As the size of software system is large and the number of faults detected ...
  • Charles, V.; Yadavalli, Venkata S. Sarma; Rao, M.C.L.; Reddy, P.R.S.; Judice, J.J. (Hindawi Publishing Corporation, 2011-02-23)
    In this paper, we propose a stochastic programming model, which considers a ratio of two nonlinear functions and probabilistic constraints. In the former, only expected model has been proposed without caring variability ...
  • Yadavalli, Venkata S. Sarma; Bekker, Andriette, 1958- (Southern African Institute for Industrial Engineering, 2005-05)
    A consistent asymptotic normal (CAN) estimator and confidence limits for the steady-state availability of series and parallel systems subject to unit failures, common-cause shock (CCS)failures and human error are studied. ...
  • Yadavalli, Venkata S. Sarma; Labeodan, Moremi Morire OreOluwapo; Udayabaskaran, Swaminathan; Mwanga, Y.A. (Operations Research Society of SA, 2009)
    Drug resistance to single therapeutic treatment in HIV infected individuals has promoted research into combined treatments. In this paper we propose a stochastic model under combined therapeutic treatment by extending ...