in (golchin a. and rezaei p., subpullbacks and flatness properties of s-posets. comm. algebra. 37: 1995-2007 (2009)) study was initiated of flatness properties of right -posets  over a pomonoid  that can be described by surjectivity of  corresponding to certain (sub)pullback diagrams and new properties such as  and  were discovered. in this article first of all we describe po-flatness propertie...

operation karbala-5 is one the important and valuable experiences of irgc during the eight-year holy defense. studying and assessing this important and extensive operation from the various strategic, com manding, tactical, and combat angles is very important and valuable as well. in the new copy of negin magazine no. 45, this article (distracted from an archived tape numbered 2666 in the center...

In this paper, we consider a multi-server queuing system in which additional servers are allowed for a longer queue to reduce the customer’s balking and reneging behavior. The customers are assumed to arrive in Poisson fashion and their service- times follow exponential distribution. The number of servers in long run depends on the queue-length. We obtain equilibrium queue size distribution. Th...

In (Golchin A. and Rezaei P., Subpullbacks and flatness properties of S-posets. Comm. Algebra. 37: 1995-2007 (2009)) study was initiated of flatness properties of right -posets  over a pomonoid  that can be described by surjectivity of  corresponding to certain (sub)pullback diagrams and new properties such as  and  were discovered. In this article first of all we describe po-flatness propertie...

Aims: Frequent investigation of the patient for determining sedation level is one of the main measures in care of critically ill patient especially after heart surgeries. Riker scale is a valid and reliable tool which has been used in different studies as sedation-agitation scale in patients hospitalized in Intensive Care Unit (ICU). This study had been done with the aim of “investigating the e...

Research studies on students' writing anxiety have been done in many EFL teaching contexts. However, there are still very limited scientific articles published about university foreign language and the causes Indonesian context. Therefore, this study's main purpose was to analyze its causes. This study employed a descriptive quantitative method. The subjects were chosen from first-year students...