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State variable representations of systems-transfer function and transfer function matrix-solutions of state equations – observability and controllability-minimal realization of MIMO systems-analysis of linear time varying systems-the concepts of stability-Lyapunov stability analysis-Lyapunov function and its properties-controllability by state variable(More)
This paper discusses the relevance of e-learning in the position of distance education in Nigeria. It commences by discussing the meaning of e-learning and distance education. It also discusses the historical background of distance education in Nigeria as well as the operations of National Open University of Nigeria (NOUN) as the first federal University in(More)
In this position paper, we review basic control strategies that machines acting as traffic controllers could deploy in order to improve the management of Internet services. Such traffic controllers are likely to spur the widespread emergence of advanced applications, which have (so far) been hindered by the inability of the networking infrastructure to(More)
SUMMARY: In today's digital economy, the construction industry is at the verge of a technological revolution. Myriad technologies are promising innovative solutions to age-old problems of coordination and delivering projects on-time, on-budget and to clients' specifications, through what has come to be known as integrated project delivery. However, there is(More)
Assembly sequence planning (ASP) becomes one of the major challenges in product design and manufacturing. A good assembly sequence leads to reduced costs and duration in the manufacturing process. However, assembly sequence planning is known to be a classical NP-hard combinatorial optimization problem; ASP with many product components becomes more difficult(More)
—One of the major points of interest in software engineering nowadays is how to ensure applications configuration files' security. In fact, they very often contain confidential information as database connection credentials, thereby providing a vulnerability point to these applications, for those files have their information clearly written. Some studies(More)
In this paper we apply a new method to solve multi-phase fluid flow problem for 1D and 2D fluid systems. This method is developed at TNO and presented in [1] for spatially homogeneous systems. We call this method the numerical density-enthalpy method (or ρ-h method) because density-enthalpy phase diagrams (or ρ-h diagrams) play an important role in it.(More)
  • El-Saeid, M. E. El-Bawab, +8 authors H. Abd-Elzaher
  • 2012
Objective: We investigate the serum level of cystatin C as biochemical marker that can determine the severity of tissue injury resulting from chronic liver diseases. Also we investigate other two parameters-alph-fetoprotein & fibronectin-serum levels as biomarkers of chronic liver disease progression. Study design: This study was carried out on 66 patients(More)