This paper presents a new carrier based pulse-width modulation (PWM) method for matrix converters. By using the concept of average over one switching period, the modulation algorithm and the required equations are derived to synthesize the desired output voltage and to achieve the controlled input power factor. The proposed method uses a continuous carrier and the predetermined duty ratio signa...

Response surface methodology (RSM) was used to optimize the microwave-assisted direct liquefaction of Sargassum polycystum C.Agardh in ethylene glycol (EG) with H(2)SO(4) as a catalyst. Based on the results of single factor experiments, EG-to-feedstock ratio, temperature and catalyst content were chosen as independent variables for a central composite rotatable design (CCRD). The optimal liquef...

objective: to evaluate whether systemic inflammatory markers (neutrophil to lymphocyte ratio (nlr), platelet to lymphocyte ratio (plr) and red blood cell distribution width (rdw) to platelet ratio (rpr)) can be used as reliable markers for the diagnosis of premature ovarian insufficiency (poi) and to determine if there is a relationship between these markers and follicle stimulating hormone (fs...

BACKGROUND Double-wave reentry (DWR) can be a mechanism for acceleration of ventricular tachycardia (VT) with a large excitable gap (EG). The purpose of this study was to determine the effects of heptanol, class Ic, and class III drugs on the inducibility of DWR. METHODS AND RESULTS In 11 Langendorff-perfused rabbit hearts, a thin ring of anisotropic left ventricular epicardium was created by...

Ephemeral gully (EG) erosion has an important impact on agricultural soil losses and increases field surface hydrology connectivity transport of pollutants to nearby water bodies. Watershed models including EG component are scarce not yet properly evaluated. The objective this study is evaluate the capacity one such tool, AnnAGNPS, simulate evolution two formed in a conservation tillage system....

Vascular endothelial growth factor (VEGF) plays an essential role in angiogenesis. This includes developmental angiogenesis as the loss of a single allele is embryonic lethal due to lack of development of endothelial cells. During early development, endothelial cells depend on VEGF for survival and if it is withdrawn, massive apoptosis results. This is not true in adult organisms; withdrawal of...

Sensitivity analysis of investigating the parameters effect on the effective width of stressed-skin panels with single-skin and double-rib is presented. Based on the results, a simple formula for predicting the effective width of stressed-skin panels was derived. With this formula, the effective width (ratio) of flange can be determined by multiplying the primary effective width ratio, which is...

PURPOSE The purpose of this study was to evaluate the measured dimensions of the normal glenoid on sagittal magnetic resonance (MR) imaging to determine whether a fixed ratio of glenoid length and width can be determined. METHODS MR images of 90 glenoids in 84 patients were analyzed. The mean age was 54.8 years, with 44 male and 40 female patients. Glenoid length and width at the widest dimen...

AIMS Animal studies suggest that in alcohol withdrawal the balance of neurotransmitters gamma aminobutyric acid (GABA) and glutamate is altered. To test this in humans, we aimed to measure plasma levels of glutamate, GABA and glutamate/GABA ratio in alcoholic patients presenting with complicated AWS with the same values in non-alcohol abuser/dependent controls and to determine prognostic factor...