Fundamental frequency sequence amplitude estimator for power and energy applications.

A grid-synchronization-based fundamental frequency positive-sequence (FFPS) and negative-sequence (FFNS) amplitudes estimation technique is proposed for unbalanced and distorted grid. In this technique, the sequence amplitudes are extracted by extracting the phase-angle of the FFPS and FFNS components. The extracted phase-angles have DC and double frequency AC components.

The new prognostic factor for pulmonary embolism: The ratio of monocyte count to HDL cholesterol.

Purpose: Aim of this study is to investigate effectiveness of the monocyte to HDL cholesterol ratio in patients diagnosed with pulmonary embolism for predicting intra-hospital mortality.

Method: A total of 269 patients diagnosed with pulmonary embolism in the emergency clinic were included in the study. Study was conducted retrospectively.

The prognostic significance of the risk scores at upper gastrointestinal bleeding.

Background: Upper gastrointestinal system (GIS) bleeding is one of the most common causes of mortality and morbidity. The predictive values of pre-endoscopic Rockall score (PERS), full Rockall score (FRS), Glasgow-Blatchford score (GBS), pre-endoscopic Baylor score (PEBS), and full Baylor score (FBS) to predict bleeding at follow-up, endoscopic therapy, blood transfusion requirement, and death are investigated in our study.

Methods: This study was retrospectively conducted in patients admitted to emergency department with upper GIS bleeding.

Mean platelet volume and the ratio of mean platelet volume to platelet count in the diagnosis of acute appendicitis.

Background: Mean platelet volume (MPV) is an inflammatory marker. Recent studies have shown that there is a negative correlation between platelet count (PC) and MPV and that the ratio of these two values may be more meaningful. The aim of our study was to investigate the diagnostic value of MPV and the MPV/PC ratio in acute appendicitis.

Fracture history in osteoporosis: risk factors and its effect on quality of life.

Background: Fractures are one of the main outcomes in osteoporosis and have an important effect on the general health status.

Aims: The purpose of this study was to determine the effect of major fracture history on quality of life. We also investigated the important risk factors and their effect on bone mineral density and fracture history.