The problem of controlling a perturbed open loop system so as to keep its performance errors within bounds is considered. The objective is to maximize the time during which performance errors remain below a prescribed ceiling, while the controlled system’s parameters are within a specified neighborhood of their nominal values. It is shown that there is an optimal open-loop controller that achie...

In spite of the importance of implementing Enterprise Resource Planning (ERP) system in any organization, there are still many fears of not getting the return on investment from implementing it. In addition, there are many ERP systems implemented in different organizations that claim they did not get enough benefit from these systems. For this reason, this paper is intended to study the impact ...

BACKGROUND Obstructive Sleep Apnea (OSA) is a potentially life-threatening condition in which there is a periodic cessation of breathing (for 10 sec or longer) that occurs during sleep in the presence of inspiratory effort. The aim of the study was to assess volumetric and dimensional differences between OSA patients and normal individuals in the upright posture. MATERIAL AND METHOD The prese...

In this paper, we propose a new fuzzy bang–bang relay controller (FBBRC). The bang–bang control systems use switching relays or hard limiter saturation functions with fixed parameters, and their input does not have the flexibility to control the non-linear system over its entire range of operation. The conventional fuzzy bang–bang controllers have an analog output and an external hard limiting ...

metal oxide surge arrester accurate modeling and its parameter identification are very important for insulation coordination studies, arrester allocation and system reliability. since quality and reliability of lightning performance studies can be improved with the more efficient representation of the arresters´ dynamic behavior. in this paper, big bang – big crunch and hybrid big bang – big cr...

Background and Objective: Obstructive sleep apnea (OSA) is the most common respiratory disorder during sleep and a risk factor for myocardial ischemia. In this study, we evaluated the proportion of subjects at high risk for OSA and prevalence of its predictors among patients admitted for acute myocardial infarction (MI). Materials and Methods: A total of 210 patients with MI admitted at the car...

Abstract Introduction We noticed that patients with OSA when admitted to hospital requested a fan even in winter. explored the literature and did not find any reports about use OSA. STOP-Bang questionnaire has been widely used preoperative clinics [4-6], sleep [7-8] detect at high-risk of STOP Bang score 5 or more high risk pilot study explore if adding FAN, especially winter, would increase se...