Results 21 to 30 of about 211,072 (304)

X-ray lines and self-interacting dark matter [PDF]

open access: yes, 2015
We study the correlation between a monochromatic signal from annihilating dark matter and its self-interacting cross section. We apply our argument to a complex scalar dark sector, where the pseudo-scalar plays the role of a warm dark matter candidate ...
Mambrini, Yann, Toma, Takashi
core   +2 more sources

Monochromatic Long-Period Seismicity Prior to the 2012 Earthquake Swarm at Little Sitkin Volcano, Alaska

open access: yesFrontiers in Earth Science, 2021
Detection of the earliest stages of unrest is one of the most challenging and yet critically needed aspects of volcano monitoring. We investigate a sequence of five unusual long-period (LP) earthquakes that occurred in the days prior to the onset of a ...
Matthew M. Haney   +3 more
doaj   +1 more source

Evaluation of superficial femoral artery-lesions after percutaneous transluminal angioplasty: color-coded summation images vs. monochromatic digital subtraction angiography

open access: yesBMC Medical Imaging, 2020
Background Percutaneous transluminal angioplasty (PTA) is increasingly requested in the therapy of peripheral arterial occlusive disease. The evaluation of the technical result after balloon angioplasty with regard to bailout stenting is highly dependent
Anne Marie Augustin   +5 more
doaj   +1 more source

Coloring subgraphs with restricted amounts of hues

open access: yesOpen Mathematics, 2017
We consider vertex colorings where the number of colors given to specified subgraphs is restricted. In particular, given some fixed graph F and some fixed set A of positive integers, we consider (not necessarily proper) colorings of the vertices of a ...
Goddard Wayne, Melville Robert
doaj   +1 more source

Can AERONET data be used to accurately model the monochromatic beam and circumsolar irradiances under cloud-free conditions in desert environment? [PDF]

open access: yesAtmospheric Measurement Techniques, 2015
Routine measurements of the beam irradiance at normal incidence include the irradiance originating from within the extent of the solar disc only (DNIS), whose angular extent is 0.266° ± 1.7 %, and from a larger circumsolar region, called the circumsolar
Y. Eissa, P. Blanc, L. Wald, H. Ghedira
doaj   +1 more source

Advanced Noise-Optimized Dual-Energy Virtual Monochromatic Imaging vs. Conventional 120-kVp CT Imaging: Image Quality Assessment

open access: yesFrontiers in Biomedical Technologies, 2021
Purpose: This study aimed at evaluating the image quality characteristics of advanced noise-optimized and traditional virtual monochromatic images compared with conventional 120-kVp images from second-generation Dual-Source CT.
Adnan Honardari   +5 more
doaj   +1 more source

Worm Colorings

open access: yesDiscussiones Mathematicae Graph Theory, 2015
Given a coloring of the vertices, we say subgraph H is monochromatic if every vertex of H is assigned the same color, and rainbow if no pair of vertices of H are assigned the same color. Given a graph G and a graph F, we define an F-WORM coloring of G as
Goddard Wayne, Wash Kirsti, Xu Honghai
doaj   +1 more source

Spectral CT imaging of laryngeal and hypopharyngeal squamous cell carcinoma: evaluation of image quality and status of lymph nodes. [PDF]

open access: yesPLoS ONE, 2013
PURPOSE: The purpose of this study was to evaluate image quality and status of lymph nodes in laryngeal and hypopharyngeal squamous cell carcinoma (SCC) patients using spectral CT imaging.
Aiyin Li   +7 more
doaj   +1 more source

Colourings of cubic graphs inducing isomorphic monochromatic subgraphs [PDF]

open access: yes, 2018
A $k$-bisection of a bridgeless cubic graph $G$ is a $2$-colouring of its vertex set such that the colour classes have the same cardinality and all connected components in the two subgraphs induced by the colour classes (monochromatic components in what ...
Bondy J. A.   +6 more
core   +3 more sources

Addition of White Light to Monochromatic Red and Blue Lights Alters the Formation, Growth, and Dormancy of In Vitro-grown Solanum tuberosum L. Microtubers

open access: yesHortScience, 2019
Monochromatic light and wide-band white light both affect plant growth and development. However, the different effects between monochromatic light and addition white light to monochromatic light on the formation, growth, and dormancy of microtubers have ...
Ruining Li   +5 more
doaj   +1 more source

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