Results 101 to 110 of about 628,380 (224)

Ultraviolet HST Observations of the Jet in M87

open access: yes, 2005
We present new ultraviolet photometry of the jet in M87 obtained from HST WFPC2 imaging. We combine these ultraviolet data with previously published photometry for the knots of the jet in radio, optical, and X-ray, and fit three theoretical synchrotron ...
Christopher Z. Waters   +6 more
core   +1 more source

Analysis of Polarization-Dependent Light Extraction and Effect of Passivation Layer for 230-nm AlGaN Nanowire Light-Emitting Diodes

open access: yesIEEE Photonics Journal, 2017
This paper investigates the polarization-dependent light extraction efficiency (ηextraction) and the effect of passivation layer for AlGaN-based nanowire (NW) deep-ultraviolet (DUV) light-emitting diodes (LEDs) emitted at 230 nm using three ...
Yu Kee Ooi, Cheng Liu, Jing Zhang
doaj   +1 more source

Titan in Transit: Ultraviolet Occultation Observations Reveal a Complex Atmospheric Structure [PDF]

open access: yesarXiv, 2020
Transit spectroscopy is a key tool for exoplanet atmospheric characterization. However, transit spectrum observations can be limited by aerosol extinction when gas opacities are weak. The ultraviolet wavelength range contains a variety of strong molecular and atomic features, potentially enabling gas species detection even when atmospheric hazes are ...
arxiv  

Adjustable Plasmonic Core–Shell Nanoparticles for Personalized Color Vision Correction

open access: yesAdvanced Engineering Materials, EarlyView.
This study introduces a personalized solution for correcting color vision deficiency (CVD) by embedding tunable core‐shell metal nanoparticles—a common nanotechnology—into contact lenses. By customizing the nanoparticles’ optical properties to filter specific wavelengths, these lenses address individual visual impairments, enhancing color ...
Hyeonah Lee   +4 more
wiley   +1 more source

FUSE Measurements of Far Ultraviolet Extinction. I. Galactic Sight Lines

open access: yes, 2005
We present extinction curves that include data down to far ultraviolet wavelengths (FUV; 1050 - 1200 A) for nine Galactic sight lines. The FUV extinction was measured using data from the Far Ultraviolet Spectroscopic Explorer. The sight lines were chosen
Brian Rachford   +20 more
core   +1 more source

AUMENTO DEL ÍNDICE SOLAR ULTRAVIOLETA CON LA ALTURA SOLAR ULTRAVIOLET INDEX INCREASE WITH ALTITUDE

open access: yesIngeniare: Revista Chilena de Ingeniería, 2008
En este trabajo se presentan los resultados obtenidos al realizar comparaciones entre mediciones experimentales de Índice solar ultravioleta (IUV) obtenido a partir de datos experimentales y también de resultados teóricos proveniente del cálculo del IUV ...
Miguel Rivas A   +2 more
doaj  

Non-perturbative match of ultraviolet renormalon [PDF]

open access: yesarXiv, 2003
The paper is motivated by observation of a kind of branes in the vacuum state of the lattice SU(2) gluodynamics. The branes represent two-dimensional vortices whose total area scales in physical units while the non-Abelian action diverges in the ultraviolet.
arxiv  

An Examination of Aerosol Jet‐Printed Surface Roughness and its Impact on the Performance of High‐Frequency Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley   +1 more source

Ultraviolet and Infrared Divergences in Implicit Regularization: a Consistent Approach

open access: yes, 2010
Implicit Regularization is a 4-dimensional regularization initially conceived to treat ultraviolet divergences. It has been successfully tested in several instances in the literature, more specifically in those where Dimensional Regularization does not ...
A. A. OSIPOV   +11 more
core   +1 more source

Effectiveness of Ultraviolet-C light diode radiation using pulsed and continuous radiation in reducing the concentration of Escherichia coli

open access: yesسلامت و محیط, 2022
Background and Objective: The application of ultraviolet photolysis in the removal of microbial contamination can develop the use of wastewater sources.
Elham Asrari, Hedieh Deyhim
doaj  

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