due to its complexity and destructive nature, convection has been subject of many studies and researches among weather phenomena throughout the world. scientists have attempted for decades to generate different types of models to provide the possibility of abating or, at least, reducing convective weather phenomena effects on people’s lives. in south or southwest of iran, people are familiar wi...

Research ComputerSystemsAvailability EvaluationUsingaSegregated FailuresModel Sergiy A. Vilkomir1,∗,†, David L. Parnas2, Veena B. Mendiratta3 and Eamonn Murphy4 1Software Quality Research Laboratory (SQRL), Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN, U.S.A. 2Software Quality Research Laboratory (SQRL), Department of Computer Science and Inf...

Today, maintenance strategies and their analyses remain a worrying problem for companies. Socio economic stakes depending on competitiveness of each strategy are even more linked to activity and quality of maintenance interventions. A series of specific events can eventually warn the expert of an imminent breakdown. Our study aims at understanding such “signature” thanks to hidden Markov models...

This paper discusses software performability evaluation considering the real-time property. We assume that the software system has two operational states from the viewpoint of the end users: one is operating with the desirable performance level according to specification and the other is with degraded performance level. The time-dependent behavior of the system is described by the Markovian sof...

This paper presents a proposed model for database replication model in private cloud availability regions, which is an enhancement of the SQL Server AlwaysOn Layers of Protection Model presents by Microsoft in 2012. The enhancement concentrates in the database replication for private cloud availability regions through the use of primary and secondary servers. The processes of proposed model dur...

Data availability is one of the most important properties of peer-to-peer (P2P) storage systems. Availability analysis model and data placement are two key design choices. Users in P2P storage system are both providers and customers. This characteristic determines that the availability analysis must be user-centric, and thereby enhance the quality of service and decrease the system cost. The po...

In this paper, an exact geometric algorithm is presented for solving two-job sequencing and scheduling problems in flexible flow shop and job shop environments while the resources are (un)available in some time periods and processors (un)availability is the same in all work centers. This study seems utterly new and it is applicable to any performance measure based on the completion time. The in...

Model-Based Systems Engineering (MBSE) methods have developed a strong foothold in the design space industry. These proven fruitful when right method is applied to problem. Reliability, Availability, and Maintainability (RAM) an equally important area. Currently, there gap applying methodology integrate two process, particularly complex. This work attempts provide that results successful integr...

PT. P adalah perusahaan yang bergerak sebagai waste management services yaitu melakukan pengelolaan limbah industri. Dalam pelaksanaan pekerjaan tersebut, banyak menggunakan alat bantu, salah satunya forklift. Forklift sangat penting bagi maka program perawatan tepat krusial untuk mencapai kondisi kestabilan ketersediaan selalu siap digunakan (availability) dari forklift tersebut. Selama ini ti...