This paper presents a soft-switching DC-DC boost converter, which can be utilized in renewable energy systems such as photovoltaic array, and wind turbine connections to infinite bus of a big power network, using grid connected inverters. In the proposed topology for the DC-DC boost converter, the main and the auxiliary power switches are turned on and turned off with zero voltage switching (ZV...

abstract traumatic hip dislocations are common in high-energy motor vehicle accidents. we present a case of a 43-year old man who sustained posterior hip dislocation with posterior wall acetabular fracture and ipsilateral intertrochantric fracture following a motorcycle accident. urgent open reduction and internal fixation of the hip fracture-dislocation and fixation of intertrochantric fractur...

we report a 64-year-old diabetic woman who developed neovascularization of the posterior capsule 2 years after cataract surgery and intraocular lens implantation. the patient was treated with single injection of 1.25 mg of intravitreal bevacizumab (avastin) via pars plana. after one week, complete regression of the posterior capsule neovascularization was achieved allowing us to perform nd: yag...

Background:  After breast conserving surgery, most recurrences occur around the primary tumor site. This justifies the use of boost radiotherapy to the primary site of tumor. Surgical scar is not always a good surrogate for the location of the lumpectomy cavity. The aim of this study was to evaluate ultrasonic guidance for detection of the lumpectomy cavity after breast conserving surgery ...

Various controlling schemes are used in dc-dc converters to control the output voltage, rise time, peak time and settling time of the response. In this paper, fuzzy logic and PID control technique are studied on Buck-Boost converter and the mentioned parameters are analyzed. The model is developed in MATLAB/Simulink.

Background and purposeFast rotating closed-bore gantry linacs are ideally suited for breath-hold treatments due to reduced imaging delivery times. We evaluated the reproducibility stability of spirometer-guided breast treatments, using intra-bore surface monitoring portal on Halcyon (Varian Medical Systems).Materials methodsSeven left-sided cancer patients were treated in SDX spirometer (Dyn’R)...

in recent year's renewable energy sources have become a useful alternative for the power generation. the power of photovoltaic is nonlinear function of its voltage and current. it is necessary to maintain the operation point of photovoltaic in order to get the maximum power point (mpp) in various solar intensity. fuzzy logic controller has advantage in handling non-linear system. maximum power ...

We develop the concept of ABC-Boost (Adaptive Base Class Boost) for multi-class classification and present ABC-MART, a concrete implementation of ABC-Boost. The original MART (Multiple Additive Regression Trees) algorithm has been very successful in large-scale applications. For binary classification, ABC-MART recovers MART. For multi-class classification, ABC-MART considerably improves MART, a...

Background: The aim of this study was to evaluate the reduction in excision cavity volume (ECV) during the whole breast radiotherapy (WBRT). The delineating of reduced cavity volume on secondary CT (computed tomography) might decrease the field size of boost plan. Materials and Methods: Twenty patients were treated having breast conservative surgery. At first, primary CT simulation (CT-1) was d...