Results 41 to 50 of about 264,403 (188)

Test of the isotropy of the speed of light using a continuously rotating optical resonator

open access: yes, 2005
We report on a test of Lorentz invariance performed by comparing the resonance frequencies of one stationary optical resonator and one continuously rotating on a precision air bearing turntable.
A. A. Michelson   +6 more
core   +1 more source

Hemodynamic Response to the Head-Up Tilt Test in Patients With Syncope as a Predictor of the Test Outcome: A Meta-Analysis Approach

open access: yesFrontiers in Physiology, 2019
Aim: The paper presents a meta-analysis of studies comparing hemodynamic parameters: heart rate (HR), systolic blood pressure (sBP), diastolic blood pressure (dBP), and stroke volume (SV) measured during head-up tilt table test (HUTT) in patients with ...
Katarzyna Buszko   +3 more
doaj   +1 more source

CMBfit: Rapid WMAP likelihood calculations with normal parameters

open access: yes, 2003
We present a method for ultra-fast confrontation of the WMAP cosmic microwave background observations with theoretical models, implemented as a publicly available software package called CMBfit, useful for anyone wishing to measure cosmological ...
A. Gelman   +34 more
core   +1 more source

Study on Centroid Height Prediction of Non-Rigid Vehicle Based on Deep Learning Combined Model

open access: yesSensors
The height of the center of gravity (ZCG) is a critical parameter for evaluating vehicle safety and performance. Systematic errors arise in ZCG measurement via the tilt-table test method due to unlocked suspension systems and variable sprung mass ...
Guoqiang Pang   +3 more
doaj   +1 more source

Relationship between the mean platelet volume values and tilt-table test results in patients with vasovagal syncope

open access: yesMedicine Science, 2018
Impaired sympathovagal balance, the main pathophysiological mechanism under the vasovagal syncope (VVS), may play a role on platelet sizes. Although it has been shown that mean platelet volume (MPV) is increased in patients with vasovagal syncope, its ...
Yalcin Gokoglan, Erkan Yildirim
doaj   +1 more source

Usefulness of Tilt Testing in Children with Syncope: A Survey of Pediatric Electrophysiologists

open access: yesIndian Pacing and Electrophysiology Journal, 2008
The role of tilt table testing as a diagnostic modality in children with unexplained syncope is unclear. We sent a questionnaire to members of the Pediatric and Congenital Electrophysiology Society to assess the current practice pattern.
Anjan S. Batra, Seshadri Balaji
doaj  

The Deformable Mirror Demonstration Mission (DeMi) CubeSat: optomechanical design validation and laboratory calibration

open access: yes, 2018
Coronagraphs on future space telescopes will require precise wavefront correction to detect Earth-like exoplanets near their host stars. High-actuator count microelectromechanical system (MEMS) deformable mirrors provide wavefront control with low size ...
Allan, Gregory   +11 more
core   +1 more source

Spatial Spectrum Analysis of Wave-Front Correction with a Segmented Mirror [PDF]

open access: yes, 2003
An expression is derived for the spatial power spectrum of wave-front errors after correction with a segmented mirror. This includes estimates of the spectral contributions of segment piston and tilt corrections and spatial aliasing by a regular array of
Padin, Stephen
core   +1 more source

Measurement and Compensation of Horizontal Crabbing at the Cornell Electron Storage Ring Test Accelerator

open access: yes, 2014
In storage rings, horizontal dispersion in the rf cavities introduces horizontal-longitudinal (xz) coupling, contributing to beam tilt in the xz plane. This coupling can be characterized by a "crabbing" dispersion term {\zeta}a that appears in the normal
Chatterjee, A.   +9 more
core   +2 more sources

Optimal design of photovoltaic shading systems for multi-story buildings [PDF]

open access: yes, 2019
This study provides new insights into the comprehensive energy and economic performances of photovoltaic shading systems (PVSS) in multi-story buildings. A numerical shading model was developed to evaluate the shading effect from an upper PVSS row on its
Fang, Yueping   +7 more
core   +1 more source

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