Sarah Tasneem

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Highly varying job demands generally consist of many short jobs mixed with several long jobs. In principle, without foreknowledge of exact service times of individual jobs, processor sharing is an effective theoretical strategy for handling such demands. In practice, however, processor sharing must be implemented by time-slicing, which incurs non-negligible(More)
In systems where job service demands are only known probabilistically, there is very little to distinguish between jobs. Therefore, no universal optimum scheduling strategy or algorithm exists. If the distribution of job times is known, then the residual time (expected time remaining for a job), based on the service it has already received, can be(More)
Often a software program’s execution time is characterized by a single value (either mean or worst-case). When multiple tasks are concurrently scheduled with time quanta such that scheduling is based on partial execution (a common scenario in multimedia systems) a more accurate estimation of residual time, R(t), is desired than can be obtained from just the(More)
Small Ubiquitin-like Modifier (SUMO) is a ∼10 kDa peptide that can be post-translationally added to a lysine (K) on a target protein to facilitate protein-protein interactions. Recent studies have found that SUMOylation can be regulated in an activity-dependent manner and that ion channel SUMOylation can alter the biophysical properties and surface(More)
Highly varying job demands generally consist of many short jobs mixed with several long jobs. In this paper, we consider a simple scenario where two job streams with different level of demands must be processed by the same server. We study the performance of several round-robin variants and FCFSP in such a scenario. The simulation results show that on the(More)
It is well known, in queueing theory, that the system performance is greatly influenced by scheduling policy. No universal optimum scheduling strategy exists in systems where individual customer service demands are not known a priori. However, if the distribution of job times is known, then the residual time (expected time remaining for a job), based on the(More)
The invention of the Internet has ushered in advances in information era which has revolutionized the way we conduct business, advances our knowledge and promote life long learning. Each second a web server computer is bombarded with queries from numerous clients. It is then the web server system that responds to the queries by serving pages to the clients.(More)