Results 51 to 60 of about 266,578 (324)

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

Generation of a flat-top laser beam for gravitational wave detectors by means of a nonspherical Fabry-Perot resonator [PDF]

open access: yes, 2007
We have tested a new kind of Fabry-Perot long-baseline optical resonator proposed to reduce the thermal noise sensitivity of gravitational wave interferometric detectors--the "mesa beam" cavity--whose flat top beam shape is achieved by means of an ...
Agresti, J.   +14 more
core   +1 more source

Cooccurrence of Postural Orthostatic Tachycardia Syndrome with Two Different Clinical Entities

open access: yesCase Reports in Pediatrics, 2016
Postural orthostatic tachycardia syndrome (POTS) is an abnormal heart rate response to a positional change. Several potential mechanisms for pathophysiology of POTS are defined. This syndrome can coexist with different clinical situations. In our report,
Funda Oztunc   +4 more
doaj   +1 more source

Folding a 2-D powder diffraction image into a 1-D scan: a new procedure

open access: yes, 2006
A new procedure aiming at folding a powder diffraction 2-D into a 1-D scan is presented. The technique consists of three steps: tracking the beam centre by means of a Simulated Annealing (SA) of the diffraction rings along the same axis, detector tilt ...
Cervellino, Antonio   +3 more
core   +1 more source

Comparison of short head-up tilt test with conventional protocol after omission of nonmedicated phase in children and young adults

open access: yesAdvanced Biomedical Research, 2016
Background: Syncope is an important and common clinical condition, and the neurally mediated syncope is the most frequent type of syncope. Tilt testing is considered as a first-line diagnostic test.
Bahar Dehghan, Mohammad Reza Sabri
doaj   +1 more source

A study into the earthquake resistance of circular adobe buildings [PDF]

open access: yes, 2012
University Technology of Sydney. Faculty of Design Architecture and Building.Unreinforced adobe or mud-brick structures have in the past suffered severe damage from seismic forces and have caused a vast number of deaths.
Jinwuth, W
core  

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

A computational assessment of the aerodynamic performance of a tilted Darrieus wind turbine [PDF]

open access: yes, 2015
The aerodynamic performance of a Darrieus wind turbine operating with the rotation axis tilted with respect to the free-stream wind speed is investigated in this paper. An Unsteady Reynolds Averaged Navier Stokes (URANS) Computational Fluid Dynamics (CFD)
Bedon, Gabriele   +2 more
core   +1 more source

Tilt-table testing: down but not out [PDF]

open access: yesClinical Practice, 2014
Clin. Pract. (2014) 11(3), 265–268 ISSN 2044-9038 part of Syncope is very common, with the overall incidence for first syncope being 6.2 per 1000 patient years, increasing to 20 in females aged over 80 years [1]. Vasovagal syncope (VVS) is by far the most common cause, explaining over 20% of cases, with an underlying cardiac cause in 10% of cases and ...
James Frith, Steve W Parry
openaire   +1 more source

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