the effect of a distributed patch mass on the natural frequency of vibration of a laminated rectangular plate with simply supported boundaries is investigated. the third order displacement field of a composite laminated rectangular plate is defined using the two variable refined plate theory. equations of motion of the plate are obtained with the help of calculus of variation. parametric study ...

background: endoscopic therapies can decrease the morbidity of patients with high risk peptic ulcer. the aim of this study was to evaluate the beneficial effects of oral omeprazole therapy in patients with bleeding peptic ulcer who received combined endoscopic treatment (epinephrine injection and argon plasma coagulation). materials and methods: eighty six patients with bleeding from gastric, d...

dyspepsia is a common gastrointestinal symptom reported in 2.9-29% of the adult iranian population. this symptom usually results from functional disease, but in one-third of cases an organic cause such as peptic ulcers, esophagitis, and in less than one percent gastric cancer can be found. the timing of an endoscopic evaluation, the value of acid reducing agents, herbal medicine and the role of...

The volumes of the left and right cardiac ventricles are important indexes for several cardiovascular diseases. In this paper, a semiautomatic algorithm based on 4D fuzzy connectedness is proposed for segmenting the cardiac ventricles in arbitrarily oriented cardiac cine MR images. The segmentation of the left ventricle was evaluated using 45 short axis images and a visual assessment of right v...

This article concerns the identification of the expertise that GI scientists have in common. Rather than attempt to be exhaustive, the approach is to identify a minimal set of expert topics shared across GI science. In this article, a set of five expert topics is proposed for this purpose: structure, uncertainty, dynamism, language and cognition, and design with geographic information. The arti...

We consider a dynamic control problem for a GI/GI/1 + GI queue with multiclass customers. The customer classes are distinguished by their interarrival time, service time, and abandonment time distributions. There is a cost ck > 0 for every class k ∈ {1,2, . . . ,N} customer that abandons the queue before receiving service. The objective is to minimize average cost by dynamically choosing which ...