Concurrency control is one of the important problems in operation systems. Various studies have been reported to present different algorithms to address this problem, although a few attempts have been made to represent an overall view of the characteristics of these algorithms and comparison of their capabilities to each other. This paper presents a survey of the current methods for controlling...

concurrency control is one of the important problems in operation systems. various studies have been reported to present different algorithms to address this problem, although a few attempts have been made to represent an overall view of the characteristics of these algorithms and comparison of their capabilities to each other. this paper presents a survey of the current methods for controlling...

Based on an analysis of the developments to date, this article originates from and then substantiates long-discussed approaches a fast, periodic unaccompanied combined rail freight transport network for Germany that corresponds target modal split. A four-stage scenario market entry is developed. The presented solution incorporates potentially novel aspects such as design based Deutschlandtakt C...

one of the most important problems in the system reliability optimization is redundancy allocation problem that has been studied in different system configurations. k-out-of-n structure is a general system configuration and offers enhanced capabilities for analyzing more design problems. hence, in this paper, the redundancy allocation problem of k-out-of-n systems is studied. in the most previo...

fault tolerance is one of the important issues in industries, such as transportation, military, chemical and nuclear sectors. reliability and safety are two vital attributes of fault tolerant systems, and redundancy is a common way to improve these parameters. this article studies the impact of including cold standby spares in system architecture. to do this, it uses the markov model of the sys...

Vehicle driveline system and its working accuracy play an important role in the performance of car. The purpose of this study is to provide an appropriate mechanism for investigating, identifying and determining the position and size of defects in the vehicle power transmission system. This is based on the patterns of the residual signal, obtained from a simulated model of the system. Neuro-...

the issue of medical errors is currently a global concern which places a heavy financial and emotional burden on communities. a clinical decision support system (cdss) is an electronic system designed to support clinical decision making. considering the increasing importance and use of systematized nomenclature of medicine-clinical terms (snomed-ct), we developed snomed-ct to implement it more ...

d: m.a. of business management. university of isfahan . [email protected] e: isfahan university of medical sciences , [email protected] knowledge as one of the greatest factors in creating value and competitive advantage, has led organizations to show great tendency toward programs of knowledge management. understanding the relationship between infrastructural capabilities and process c...