In this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. The engines are assumed to be implemented as composite web services. Current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. The difficulty is to rollback the execution state of the workflo...

this paper analyzes a renewal input  working vacations queue with change over times and bernoulli schedulevacation interruption under (a,c,b) policy.the service and vacation times are exponentially distributed.the server begins service if there are at least c units in the queue and the service takes place in batches with a minimum of size a and a maximum of size b (a

innovation has attracted considerable interest in recent years in improving competitive advantage for both profit and nonprofit organizations. service innovation offers the potential for substantially improving the performance, but performance gains are often obstructed by users’ unwillingness to accept and use available systems. this research aims to use the concept of reasoned action theory t...

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service availability is important for any organization. this has become more important with the increase of dos attacks. it is therefore essential to assess the threat on service availability. we have proposed a new model for threat assessment on service availability with a data fusion approach. we have selected three more important criteria for evaluating the threat on service availability and...

this paper studies an m/g/1 repairable queueing system with multiple vacations and n-policy, in which the service station is subject to occasional random breakdowns. when the service station breaks down, it is repaired by a repair facility. moreover, the repair facility may fail during the repair period of the service station. the failed repair facility resumes repair after completion of its re...

in this paper an attempt has been made to show how information technology (it) is used as a strategic tool to meet competitive advantages and how it is rapidly becoming a necessary ingredient for achieving quality within the service industry. an in-depth review of information requirements for service sectors has been made and the possible relationships between it and typology of service organiz...

in recent years, performance gap between private and public sector has affected researchers of public administration to pay attention to the concept of public service motivation. present research has been accomplished aiming at improving public service motivation among employees of public sector and is intended to identify effective factors on public service motivation. for this reason, 196 peo...

the study was carried out to assess the implication of the use of selected information and communication technologies (icts) for extension service delivery in nigeria. the simple random technique was used to select fifty percent of the total extension agents which equivalent to forty-two respondents as sample size for the study. frequency counts, percentages, mean and standard deviation were us...

background: a patient's satisfaction with nursing service is one of the main indices for measuring the quality and effectiveness of health care. objective: the purpose of this study was to investigate and compare patients' satisfaction with the nursing service provided in selected training hospitals in tehran. methods: this cross-sectional study was conducted in 2013 using patient&apo...