Results 41 to 50 of about 450,240 (212)

Flat lens criterion by small-angle phase

Optics Express, 2014
We show that a classical imaging criterion based on angular dependence of small-angle phase can be applied to any system composed of planar, uniform media to determine if it is a flat lens capable of forming a real paraxial image and to estimate the image location.
Ott, Peter, Shakhs, Mohammed H. Al, Lezec, Henri J., Chau, Kenneth J.   +3 more
openaire   +3 more sources

The role of phase angle in the diagnosis of presarcopenia in elderly patients with type 2 diabetes mellitus

Российский журнал гериатрической медицины
The study of age-associated diseases is an integral component of modern medicine. In the conducted study, diagnostic phase angle limits for the detection of presarcopenia in patients with type 2 diabetes mellitus (T2DM) were determined.
R. N. Obedkov, E. I. Dedov, I. G. Pshennikova   +2 more
doaj   +1 more source

Changes in body water distribution and phase angle following rapid ascent to 3,680 m and their association with acute mountain sickness: a prospective cohort study

Frontiers in Public Health
BackgroundAcute mountain sickness (AMS) is a common pathological response following rapid ascent to high altitude, and its underlying mechanisms remain incompletely understood.
Xianglian Li, Jie He, Jie Zhang, Yaru Li, Yanlin Zhu, Liwen Mo, Yue Cheng, Yue Cheng   +7 more
doaj   +1 more source

Variable shift work in family medicine residents is associated with a non-dipper pattern and reduced phase angle: possible adaptive blood pressure mechanisms and body composition imbalance

Frontiers in Cardiovascular Medicine
BackgroundShift work is associated with alterations in blood pressure (BP), metabolic changes, and unhealthy lifestyle patterns. However, the relationship between BP and variability in work hours remains poorly understood.
Elías Cardoso-Peña, Elías Cardoso-Peña, José de Jesús Garduño-García, Alejandra Donají Benítez-Arciniega, Martha Beatriz Bustamante-Hernández, Rigoberto Oros-Pantoja, Alexandra E. Soto-Piña   +6 more
doaj   +1 more source

Athlete or Non-athlete? This Is the Question in Body Composition

Frontiers in Physiology, 2021
Francesco Campa, Giuseppe Coratella
doaj   +1 more source

NISTAR measurements confirm basic aspects of EPIC-derived global-scale dayurnal variability in Earth’s reflected radiation

Frontiers in Remote Sensing
A unique model/data comparison capability is made possible by the unique viewing geometry from NASA’s DSCOVR Mission Lissajous orbital location around the Lagrangian L1 point.
Andrew A. Lacis, Gary L. Russell, Barbara E. Carlson, Wenying Su, Yinan Yu   +4 more
doaj   +1 more source

Experimental investigation of flow characteristics of corrugated channel flow using PIV

Journal of Thermal Engineering, 2016
The aim of the study is to determine the flow characteristics of corrugated duct. The whole study has been conducted for Reynolds numbers, Re=4000 and 6000. The corrugated duct geometry was designed for aspect ratios, s/H=0.3 and phase shift angle, φ=180̊
Nehir Tokgöz
doaj   +1 more source

Bioelectrical Impedance Profiling to Estimate Neuropathic and Vascular Risk in Patients with Type 2 Diabetes Mellitus

Diagnostics
Background/Objectives: Microvascular complications are a major source of disability in type 2 diabetes mellitus (T2DM). We investigated whether body composition indices derived from multifrequency bioelectrical impedance analysis (BIA) independently ...
Elizabeth Quiroga-Torres, Fernanda Marizande, Cristina Arteaga, Marcelo Pilamunga, Lisbeth Josefina Reales-Chacón, Silvia Bonilla, Doménica Robayo, Sara Buenaño, Sebastián Camacho, William Galarza, Alberto Bustillos   +10 more
doaj   +1 more source

Cell membrane capacitance relationship to reference-measured body composition parameters in young adult athletes

Journal of Electrical Bioimpedance
Cell membrane capacitance (Cm) is considered a measure of cellular health. This study evaluated the relationship between bioimpedance spectroscopy-measured Cm and multicomponent model reference-measured body composition variables from air displacement ...
Wagner Dale R.
doaj   +1 more source

Association of Bioelectrical Impedance Analysis Parameters with Malnutrition in Patients Undergoing Maintenance Hemodialysis: A Cross-Sectional Study

Medicina
Background and Objectives: Malnutrition is one of the most common complications in patients undergoing hemodialysis (HD) and is closely linked to increased morbidity and mortality. This study aimed to investigate the nutritional status of HD patients and
Minh D. Pham, Thang V. Dao, Anh T. X. Vu, Huong T. Q. Bui, Bon T. Nguyen, An T. T. Nguyen, Thuy T. T. Ta, Duc M. Cap, Toan D. Le, Phuc H. Phan, Ha N. Vu, Tuan D. Le, Toan Q. Pham, Thang V. Le, Thuc C. Luong, Thang B. Ta, Tuyen V. Duong   +16 more
doaj   +1 more source