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A linear time-delay system is used to model load balancing in a cluster of computer nodes used for parallel computations. The linear model is analyzed for stability in terms of the delays in the transfer of information between nodes and the gains in the load balancing algorithm. This model is compared with an experimental implementation of the algorithm on… (More)

- John N. Chiasson, Zhong Tang, +4 authors Henry N. Jerez
- IEEE Trans. Contr. Sys. Techn.
- 2005

— A deterministic dynamic nonlinear time-delay system is developed to model load balancing in a cluster of computer nodes used for parallel computations. The model is shown to be self consistent in that the queue lengths cannot go negative and the total number of tasks in all the queues and the network are conserved (i.e., load balancing can neither create… (More)

- J. Ghanem, C. T. Abdallah, M. Hayat, S. Dhakal, Z. Tang
- 2004

— In this paper, experimental evaluation of a control-theoretic based load balancing algorithm in real environments is presented. we emphasize on the effects of delays in the exchange of information among nodes, and the constraints these effects impose on the design of a load balancing strategy. two test-beds in two different real environments have been… (More)

Parallel computer architectures utilize a set of computational elements (CE) to achieve performance that is not attainable on a single processor, or CE, computer. A common architecture is the cluster of otherwise independent computers communicating through a shared network. To make use of parallel computing resources, problems must be broken down into… (More)

– A deterministic dynamic nonlinear time-delay systems is developed to model load balancing in a cluster of computer nodes used for parallel computations. This model refines a model previously proposed by the authors to account for the fact that the load balancing operation involves processor time which cannot be used to process tasks. Consequently, there… (More)

- Zhong Tang, J. Douglas Birdwell, John N. Chiasson, Chaouki T. Abdallah, Majeed M. Hayat
- IEEE Trans. Contr. Sys. Techn.
- 2008

— The critical features of the load balancing problem are the delayed receipt of information and transferred load. Load distribution and task processing contend for the same resources on each computational element. This paper documents experimental results using a previously reported deterministic dynamic nonlinear system for load balancing in a cluster of… (More)

– Deterministic dynamic nonlinear time-delay systems are developed to model load balancing in a cluster of computer nodes used for parallel computations. The model is shown to be self consistent in that the queue lengths cannot go negative and the total number of tasks in all the queues are conserved (i.e., load balancing can neither create nor lose tasks).… (More)

A deterministic dynamic nonlinear time-delay system is developed to model load balancing in a cluster of computer nodes used for parallel computations. This model refines a model previously proposed by the authors to account for the fact that the load balancing operation involves processor time which cannot be used to process tasks. Consequently, there is a… (More)

- Yong Zhu, Dongsheng Wang, +14 authors Jia Yu
- Nucleic acids research
- 2013

miRNAs play important roles in many biological processes, including erythropoiesis. Although several miRNAs regulate erythroid differentiation, how the key erythroid regulator, GATA-1, directly orchestrates differentiation through miRNA pathways remains unclear. In this study, we identified miR-23a as a key regulator of erythropoiesis, which was upregulated… (More)

- Chaouki T. Abdallah, Nivedita Alluri, +4 authors Tsewei Wang
- Int. J. Systems Science
- 2003

A linear time-delay system is proposed to model load balancing in a cluster of computer nodes used for parallel computations. The linear model is analyzed for stability in terms of the delays in the transfer of information between nodes and the gains in the load balancing algorithm. This model is compared with an experimental implementation of the algorithm… (More)