Results 71 to 80 of about 7,202 (193)

Design and Implementation of a Compact Echelle Spectrometer

DEStech Transactions on Engineering and Technology Research, 2018
As a special kind of spectrometers, echelle spectrometer features wide spectral range and full spectrum direct reading. However, the two-dimensional dispersion of the echelle grating usually leads to complex structure and aberration conditions, which impacts the resolution. In this work, a compact echelle spectrometer with wide detection range and high
XIAO FU, FA-JIE DUAN, YANG LI
openaire   +2 more sources

Determination of trace elements in titanium oxides by wavelength dispersive x‐ray fluorescence spectrometry (WD‐XRF)

X-Ray Spectrometry, Volume 54, Issue 1, Page 16-25, January/February 2025.
Abstract TiO2 is used in a great variety of industries (foods, medicines, cosmetics, etc.). In food industry, although the use of TiO2 as additive was banned by EU in 2022, it is still authorized in medicinal products, and is allowed as food ingredient in US and Canada.
M. F. Gazulla, M. Orduña, M. Rodrigo
wiley   +1 more source

Dynamics, Monitoring, and Forecasting of Tephra in the Atmosphere

Reviews of Geophysics, Volume 62, Issue 4, December 2024.
Abstract Explosive volcanic eruptions inject hot mixtures of solid particles (tephra) and gasses into the atmosphere. Entraining ambient air, these mixtures can form plumes rising tens of kilometers until they spread laterally, forming umbrella clouds. While the largest clasts tend to settle in proximity to the volcano, the smallest fragments, commonly
F. Pardini, S. Barsotti, C. Bonadonna, M. de’ Michieli Vitturi, A. Folch, L. Mastin, S. Osores, A. T. Prata   +7 more
wiley   +1 more source

Carbon Materials With Conductivity Gradients Allow Dynamic Screening of Steep Temperature Differences Along Thin Films

Advanced Functional Materials, Volume 34, Issue 45, November 5, 2024.
Infusion withdrawal coating allows impregnation of cellulose with various FeCl3 concentrations. Carbonization leads then to gradual changes in the carbon microstructure and transport properties. This results in an exciting material with a controllable temperature gradient. Abstract Carbon materials comprise a wide range of microstructures and excellent
Alexander Berger, Marius Schöttle, Flora Lebeda, Holger Schmalz, Peter Bösecke, Sabine Rosenfeldt, Andreas Greiner, Markus Retsch   +7 more
wiley   +1 more source

Discovery of a Nearby Habitable Zone Super-Earth Candidate Amenable to Direct Imaging

The Astronomical Journal
We present the discovery of GJ 251 c, a candidate super-Earth orbiting in the habitable zone (HZ) of its M dwarf host star. Using high-precision Habitable-zone Planet Finder and NEID RVs, in conjunction with archival RVs from the Keck I High Resolution ...
Corey Beard, Paul Robertson, Jack Lubin, Eric B. Ford, Suvrath Mahadevan, Gudmundur Stefansson, Jason T. Wright, Eric Wolf, Vincent Kofman, Vidya Venkatesan, Ravi Kopparapu, Roan Arendtsz, Rae Holcomb, Raquel A. Martinez, Stephanie Sallum, Jacob K. Luhn, Chad F. Bender, Cullen H. Blake, William D. Cochran, Megan Delamer, Scott A. Diddams, Michael Endl, Samuel Halverson, Shubham Kanodia, Daniel M. Krolikowski, Andrea S. J. Lin, Sarah E. Logsdon, Michael W. McElwain, Andrew Monson, Joe P. Ninan, Jayadev Rajagopal, Arpita Roy, Christian Schwab, Ryan C. Terrien   +33 more
doaj   +1 more source

A high-speed bi-polar outflow from the archetypical pulsating star Mira A

, 2009
Optical images and high-dispersion spectra have been obtained of the ejected material surrounding the pulsating AGB star Mira A. The two streams of knots on either side of the star, found in far ultra-viollet (FUV) GALEX images, have now been imaged ...
Boumis, P., Lloyd, M., Lopez, J. A., Meaburn, J., Redman, M. P.   +4 more
core   +1 more source

Controlled Surface Decoration with Functional Supramolecular Nanofibers by Physical Vapor Deposition

Advanced Materials Interfaces, Volume 11, Issue 25, September 3, 2024.
The preparation of surface‐decorated woven fabrics with densely packed supramolecular nanofibers using a dedicated 1,3,5‐benzenetricarboxamide is realized by physical vapor deposition. This process achieves a very uniform length of nanofibers in a controlled manner.
Dennis Schröder, Klaus Kreger, Ulrich Mansfeld, Hans‐Werner Schmidt   +3 more
wiley   +1 more source

Optical design of a multi-resolution, single shot spectrograph

, 2016
Multi-object or integral field spectrographs are recognized techniques for achieving simultaneous spectroscopic observations of different or extended sky objects with a high multiplex factor.
Henault, Francois, Laurent, Florence
core   +1 more source

Soil fertilization with microalgae biomass from municipal wastewater treatment causes no additional leaching of dissolved macronutrients and trace elements in a column experiment

Journal of Environmental Quality, Volume 53, Issue 5, Page 618-628, September/October 2024.
Abstract Microalgae are a promising bio‐fertilizer that can be cultivated in municipal wastewater, where the organisms perform water purification by incorporation of nutrients and contaminants. Before bio‐fertilization with wastewater‐grown microalgae can be put into practice, its impact on the leaching of macronutrients and trace elements needs to be ...
Harald Weigand, Hermann Velten, Rolf‐Alexander Düring, Peter Chifflard, Marcus Rohnke, Timo Weintraut, Steffen Heusch, Ulf Theilen   +7 more
wiley   +1 more source

Origins of Super Jupiters: TOI-2145b has a Moderately Eccentric and Nearly Aligned Orbit

The Astronomical Journal
Super Jupiters are giant planets with several Jupiter masses. It remains an open question whether these planets originate with such high masses or grow through collisions.
Jiayin Dong, Ashley Chontos, George Zhou, Gudmundur Stefansson, Songhu Wang, Chelsea X. Huang, Arvind F. Gupta, Samuel Halverson, Shubham Kanodia, Jacob K. Luhn, Suvrath Mahadevan, Andrew Monson, Jaime A. Alvarado-Montes, Joe P. Ninan, Paul Robertson, Arpita Roy, Christian Schwab, Jason T. Wright   +17 more
doaj   +1 more source