We derive an asymptotically accurate formula for the beam waist of ultrashort, tightly focused fundamental linearly polarized, radially polarized, and azimuthally polarized modes in free space. We compute the exact beam waist via numerical cubature to ascertain the accuracy with which our formula approximates the exact beam waist over a broad range of parameters of practical interest. Based on ...

Body fat (BF) and cardiorespiratory fitness (CRF) are important health markers that ought to be considered in screening exams. The aim of this study was assess the value six indicators, i.e., tri-ponderal mass index (TMI), relative (RFM), waist–BMI ratio, waist-to-height ratio (WHtR), waist-to-hip (WHR) body (BMI) predicting CRF school-aged children. analysis based on data coming from examinati...

This study aimed to evaluate sleep quality and sleepiness level their relationship with obesity indicators in Brazilian military pilots. Forty pilots answered validated questionnaires assess daytime anamnesis. Body mass, height, waist hip circumferences, body composition were measured, waist-to-height ratio (WHTR), waist/hip (WHR), mass index (BMI) calculated. Visceral adipose tissue was measur...

waist/hip ratio accounted for only 1·8%. Waist/hip ratio correlated poorly with attractiveness, whereas even small changes in body-mass index radically altered the attractiveness rating (see figure). Further analyses included other bodyshape dimensions, including waist/bust ratio (upper-body shape), bust/hip ratio (degree to which the body has “hourglass” shape), and the leg length/torso length...

The present study tested whether in patients with type 2 diabetes mellitus (DM) the combination of increased waist circumference and increased plasma triglyceride (TG) levels can predict the presence of coronary artery disease (CAD) as assessed by multidetector computed tomographic coronary angiography (CTA). In 202 patients with type 2 DM who were clinically referred for CTA, waist circumferen...

BACKGROUND Waist circumference has been identified as a valuable predictor of cardiovascular risk in children. The development of waist circumference percentiles and cut-offs for various ethnic groups are necessary because of differences in body composition. The purpose of this study was to develop waist circumference percentiles for Chinese children and to explore optimal waist circumference c...

BACKGROUND Screening for increased waist circumference and hypertriglyceridemia (the hypertriglyceridemic-waist phenotype) has been proposed as an inexpensive approach to identify patients with excess intra-abdominal adiposity and associated metabolic abnormalities. We examined the relationship between the hypertriglyceridemic-waist phenotype to the risk of coronary artery disease in apparently...

OBJECTIVE To evaluate the association between alcohol consumption and abdominal fat. METHODS Cross-sectional study carried out in a sample of male blood donors (n=1,235), aged 20-59 years, in the city of Cuiabá, Central-West Brazil, between August 1999 and January 2000. Waist circumference and waist-to-hip ratio were indicators of abdominal fat, adjusted for total adiposity. Weight, height, w...

BACKGROUND Several studies showed that the waist circumference of US adults has increased over the past 25 y. However, because of the high correlation between waist circumference and body mass index (BMI; in kg/m²) (r ∼ 0.9), it is uncertain if these trends in waist circumference exceed those expected on the basis of BMI changes over this time period. OBJECTIVE We assessed whether the recent ...