In this paper, we compared the mean response time of distributed and hierarchical Web-caching architectures by utilizing an analytical model. The analytical model uses simplifying assumptions for distributed and hierarchical caching systems such that they can be defined using a birth-death model. The analytical results show that the mean response time in the distributed caching system tends to ...

in today's business environment in which coordination and adaptation with constant changes are the only ways of survival, real-time monitoring of activities and making the decisions accordingly are necessary. since performance measurement cannot be managed independent of business processes, business activity monitoring (bam) systems should monitor performance metrics based on business processes...

it is commonly recognized that knowledge is the only source of core competence of environmental projects in the knowledge based companies, but the productivity rate of knowledge workers is always low. based on knowledge workers’ characteristics, in this paper, we seek to identify knowledge workers factors influencing on the environmental projects risk management success (eprm), then knowledg...

A major United States Food and Drug Administration effort is devoted to process analytical technology (PAT), which is emerging as the likely "surprise" of the second half of the decade. PAT is an approach to monitoring, manufacturing, and other processes on a continuous rather than discrete basis. It carries the future promise of new methods of production. Building PAT into a chromatography sys...

A fast discrete model for the simulations of thin charged jets produced during the electrospinning process is derived, based on an efficient implementation of the boundary element method for the computation of electrostatic interactions of the jet with itself and with the electrodes. Short-range electrostatic forces are evaluated with slender-body analytical approximations, whereas a hierarchic...

Surveys in several office buildings have shown that crowded work places, job dissatisfaction and physical environment are the main factors affecting productivity. the data was produced and analyzed using occupational stress indicator in conjunction with the analytical hierarchical process. thermal problems, stuffiness, sick building syndrome factors and crowded work places were most frequent co...

the present study was conducted to determine the most appropriate tree species planted in the same ecological condition considering different variables at darabkola forest, mazandran province. for this purpose, the success of planted species (maple, walnut, oak, pine, ash and elm) was assessed according to ninecriteria (soil nitrogen, soil phosphorus, soil potassium, leaf nitrogen, leaf phospho...

a suitable location plays an important role in the competitiveness of a plant inthe market and should be selected such that it allows access to strategic advantagescompared with other competitors. the aim of the current study was identificationoptimized location of fluting paper plant from agricultural residues in mazandaranprovince using the analytical hierarchy process (ahp). after performing...

it is commonly recognized that knowledge is the only source of core competence of environmental projects in the knowledge based companies, but the productivity rate of knowledge workers is always low. based on knowledge workers’ characteristics, in this paper, we seek to identify knowledge workers factors influencing on the environmental projects risk management success (eprm), then knowledge s...