Efforts to improve the efficiency of internal combustion engines in applications such as heavy-duty vehicles where electric propulsion is currently unfeasible or need complementing are essential. However, studying conditions actual whilst accessing their chambers they operation remains difficult. To allow for characterization practical operating diesel engine designs, detailed studies examining...

The article discusses the main structural features of radial-shear rolling mini-mills and their most common sizes. A generalized algorithm for designing such mills using modern CAD systems is described. approaches to methodology software adaptive design models in engineering are listed with differences. In particular, horizontal modeling, explicit modeling methodology, resilient strategy consid...

BACKGROUND To determine the prevalence of elevated glycated hemoglobin (HbA1c) and to examine its relationship with other carbohydrate metabolic parameter among Brazilian women with polycystic ovary syndrome (PCOS). METHODS A cross-sectional study including 288 PCOS patients was conducted. Anthropometrical, clinical, biochemical and endocrine parameters were evaluated. RESULTS The mean age ...

Objective: To evaluate the efficacy of anthropometric and body composition parameters in the prediction of body fat percentage and lipid profile in schoolchildren. Methods: Cross-sectional study with 209 schoolchildren aged between seven and nine years old. The following variables were evaluated: weight, height, body mass index, percentage of body fat, arm and waist circumferences, conicity ind...

A method is proposed to determine the transfer matrix parameters of a discontinuity in a waveguide with the finite element method (FEM). This is used to characterize open and closed woodwind instrument toneholes and develop expressions for the shunt and series equivalent lengths. Two types of toneholes are characterized: Unflanged toneholes made of thin material, such as found on saxophones and...

This study used a mechanical test to evaluate the flexibility of instruments from the K3 (conicity 0.04) and the ProTaper Universal systems when they were new and after 5 uses in simulated canals. Five sets of instruments of each system were tested: K3 (15, 20, 25, 30, 35, 40 and 45) and ProTaper Universal (S1, S2, F1, F2, F3, F4 and F5). Each set of instruments was used to prepare a simulated ...

A cross-sectional study of 220 (110 men and 110 women) adult (> 20 years) Marwaris of Howrah, West Bengal, India, was undertaken to investigate the frequency of overweight and obesity, using different criteria. Results revealed that men had significantly greater mean height, weight, waist circumference (WC), waist-hip ratio (WHR), conicity index (CI) and fat free mass (FFM), compared with women...

BACKGROUND The association between obesity and blood pressure is well documented and a series of obesity indices are used as risk factors or indicators of blood pressure and/or the presence of hypertension. OBJECTIVE The aim of the present study was to explore and determine which obesity index is the best indicator of blood pressure and the presence of hypertension among five frequently used ...

The aim of this study was to evaluate the root canal anatomy of mandibular incisors before and after endodontic instrumentation, identifying regions inaccessible to the action of files (Critical instrumentation Area - CA) in a three-dimensional perspective. Thirty human mandibular central incisors were selected, assigned to two groups (n=15) and instrumented using ProTaper Universal rotary file...

Obesity in children is a cause for concern because it may predict adult obesity and increased risk of coronary heart disease in adult life. Adiposity in preschool children is measured by different conventional indices. The aim of the present study was to measure the indicators of abdominal adiposity - waist circumference (WC), waist-hip ratio (WHR), waist-height ratio (WHTR), conicity index (CI...