Results 121 to 130 of about 372,055 (343)
Optical Design of a Near-infrared Spectrograph Prototype for LAMOST
The Astronomical JournalThe Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) has demonstrated exceptional capability in optical spectroscopic surveys. To overcome its inherent limitations in observing late-type stars and regions of high extinction, we present ...
Xiaojie Zhang +4 more
doaj +1 more source
The Role of Calcitonin Gene‐Related Peptide in High‐Altitude Headache: A Prospective Field Study
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective High‐altitude headache (HAH) is a common neurological condition associated with rapid ascent to high altitude. The pathophysiological mechanisms underlying HAH remain incompletely understood. Calcitonin gene‐related peptide (CGRP), a neuropeptide implicated in migraine pathophysiology, may play a key role in the pathophysiology of ...
Roman Schniepp +4 more
wiley +1 more source
Espectrometria de Massas em Geologia Isotópica [PDF]
Geologia USP. Série Científica, 2002 The present paper discusses the main types of mass spectrometers available in 2002 (TIMS, ICP-MS, SIMS andelectron impact-MS) with application to isotope geology and especially to geochronology.
Kei Sato, Koji Kawashita
doaj
Assessing performance of modern Brillouin spectrometers.
Optics Express, 2018 Brillouin spectroscopy and imaging has experienced a renaissance in recent years seeing vast improvements in methodology and increasing number of applications.
Zachary N. Coker +5 more
semanticscholar +1 more source
Advanced Engineering Materials, Volume 27, Issue 6, March 2025.ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur +5 more
wiley +1 more source
Miniaturized spectrometers [PDF]
A spectrometer is a scientific analytical instrument that studies the properties of light by measuring its wavelength or frequency. The use of spectrometers has been divided into two fields of study: spectrometry and spectroscopy.
Kaijasilta, Elias
core
Intercomparison of air ion spectrometers: a basis for data interpretation [PDF]
, 2011 . We evaluated 11 air ion spectrometers from Airel Ltd. after they had spent one year in field measurements as a part of the EUCAARI project: 5 Air Ion Spectrometers (AIS), 5 Neutral cluster and Air Ion Spectrometers (NAIS) and one Airborne NAIS (ANAIS).
S. Mirme +14 more
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Miniature computational spectrometer with a plasmonic nanoparticles-in-cavity microfilter array
Nature CommunicationsOptical spectrometers are essential tools for analysing light‒matter interactions, but conventional spectrometers can be complicated and bulky. Recently, efforts have been made to develop miniaturized spectrometers. However, it is challenging to overcome
Yangxi Zhang +5 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo +3 more
wiley +1 more source
Modeling of mass spectrometers using linear and nonlinear ion mirrors [PDF]
, 2013 The paper presents basic relations for calculating the parameters of mass spectrometers using ion mirrors with linear and nonlinear distribution of the axial potential. The results of simulations of the two types of spectrometers are presented as well as
N. D. Syomkin +2 more
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