Results 1 to 10 of about 189,089 (259)

Evaluation and comparison of oral endotracheal tube depth prediction formulas in children with scoliosis: a retrospective study [PDF]

Frontiers in Pediatrics
BackgroundChildren with scoliosis exhibit unique anatomical characteristics which challenge the accurate prediction of endotracheal tube (ETT) depth.ObjectiveTo evaluate commonly used pediatric ETT depth prediction methods in children with scoliosis ...
Yangyang Zhang, Peng Gao, Qingshui Zheng, Bo Zhu   +3 more
doaj   +2 more sources

Assessing cervical intervertebral disc height on MRI and X-ray versus CT; a single center retrospective cohort study [PDF]

Brain and Spine
Introduction: Cervical intervertebral disc height is often used to score cervical degenerative disc disease (CDDD) and can also aid in pre-operative surgical planning. For this purpose, MRI and X-ray imaging are routinely used.
Esther van Santbrink, Toon Boselie, Valérie Schuermans, Nykle Krijgsveld, Rob de Bie, Anouk Smeets, Henk van Santbrink   +6 more
doaj   +2 more sources

Footprint and height corrections for UAV-borne gamma-ray spectrometry studies [PDF]

Journal of Environmental Radioactivity, 2021
Advancements in the development of gamma-ray spectrometers (GRS) have led to small and lightweight spectrometers that can be used under unmanned aerial vehicles (UAVs). Airborne GRS measurements are used to determine radionuclide concentrations in the ground, among which the natural occurring radionuclides 40K, 238U, and 232Th.
Mats SÖDerstrÖM, Emiel Van Der Graaf, E R Van Der Graaf   +2 more
exaly   +4 more sources

Effect of the form of the height-height correlation function on diffuse x-ray scattering from a self-affine surface [PDF]

Physical Review B, 1993
Height-height correlations for self-affine surfaces with finite horizontal cutoffs are generally modeled by exponential forms. Three mathematically acceptable, alternate forms for the height-height correlation function are investigated, to explore their impact on the analysis of diffuse x-ray-reflectivity data. The appropriateness of these functions to
Jacqueline Krim, George Palasantzas
exaly   +4 more sources

Determination of the Height-Height Correlation Function of Rough Surfaces from Diffuse X-Ray Scattering

Europhysics Letters, 1995
We show that the height-height correlation function of a rough surface can be determined from the diffuse x-ray scattering intensity by an explicit back-transformation without any model assumptions. This is in contrast to the conventional fitting procedure of the data with parameterized correlation functions. The method is illustrated by the example of
Tim Salditt
exaly   +5 more sources

Height and Energy Evolution of X-Ray Double Sources in a Solar Flare

The Astrophysical Journal
In the standard model, magnetic reconnection at a vertical current sheet above the flare arcade is key to explaining many aspects of solar eruptions. The supra-arcade region is where the vertical current sheet is supposedly located, and X-ray/extreme ...
Hanya Pan, Astrid M. Veronig, Rui Liu
doaj   +3 more sources

Enhanced Multi-Beam Echo Sounder Simulation through Distance-Aided and Height-Aided Sound Ray Marching Algorithms

Journal of Marine Science and Engineering
The study proposes two innovative algorithms in the field of multi-beam echo sounder (MBES) simulation: distance-aided sound ray marching (DASRM) and height-aided sound ray marching (HASRM).
Jianhua Cheng, Jingyu Ge, Runze Bai
doaj   +3 more sources

Ray tracing height fields [PDF]

Proceedings Computer Graphics International 2003, 2004
We present a novel surface reconstruction algorithm which can directly reconstruct surfaces with different levels of smoothness in one framework from height fields using 3D discrete grid ray tracing. Our algorithm exploits the 2.5D nature of the elevation data and the regularity of the rectangular grid from which the height field surface is sampled ...
Huamin Qu, Feng Qiu, Nan Zhang 0011, Arie E. Kaufman, Ming Wan   +4 more
openaire   +1 more source

Is the Planus Foot Type Associated With First Ray Hypermobility?

Foot & Ankle Orthopaedics, 2022
Background: Many foot pathologies have been associated with foot type. However, the association of first ray hypermobility remains enigmatic. The purpose of this study was to investigate first ray hypermobility among participants with planus and rectus ...
Oliver J. Morgan PhD, Rajshree Hillstrom PhD, MBA, Robert Turner PT, Jonathan Day MD, Ibadet Thaqi MBA, Kristin Caolo BS, Scott Ellis MD, Jonathan T. Deland MD, Howard J. Hillstrom PhD   +8 more
doaj   +1 more source

Evaluation of gamma-ray strength function based on measured gamma-ray pulse-height spectra in time-of-flight neutron capture experiments [PDF]

EPJ Web of Conferences, 2020
In order to develop an evaluation method of gamma-ray strength function (GSF), neutron capture pulse-height (PH) spectrum of gold was employed, where it was measured with the NaI(Tl) spectrometer of AN-NRI installed at the Material and Life Science ...
Iwamoto Nobuyuki, Nakamura Shoji, Kimura Atsushi, Katabuchi Tatsuya, Rovira Gerard, Hara Kaoru, Y., Iwamoto Osamu   +6 more
doaj   +1 more source