Results 1 to 10 of about 19,989 (132)

Assigning Degrees of Stochasticity to Blazar Light Curves in the Radio Band Using Complex Networks [PDF]

open access: yesEntropy, 2022
We focus on characterizing the high-energy emission mechanisms of blazars by analyzing the variability in the radio band of the light curves of more than a thousand sources.
Belén Acosta-Tripailao   +3 more
doaj   +2 more sources

Arsenotoxicidad aguda experimental en ratones Balb/c: marcadores orgánicos y compromiso esplénico [PDF]

open access: yesBiomédica: revista del Instituto Nacional de Salud, 2021
Introducción. El arsénico es un tóxico ambiental ampliamente diseminado en todo el mundo. En hombres y animales, diversos órganos y tejidos son blancos de sus efectos deletéreos, entre ellos, el los del sistema inmunológico. Objetivo.
Alejandra Mariel Canalis   +3 more
doaj   +2 more sources

Soil-mimicking microfluidic devices reveal restricted flagellar motility of Bradyrhizobium diazoefficiens under microconfinement [PDF]

open access: yesCommunications Biology
Bradyrhizobium diazoefficiens is a nitrogen-fixing symbiont of soybean, worldwide used as biofertilizer. This soil bacterium possesses two flagellar systems enabling it to swim in water-saturated soils.
Moniellen Pires Monteiro   +6 more
doaj   +2 more sources

Design-Considerations regarding Silicon/Graphite and Tin/Graphite Composite Electrodes for Lithium-Ion Batteries [PDF]

open access: yesScientific Reports, 2018
An analytical model is proposed to investigate properties of composite electrodes that utilize more than one active material. We demonstrate how the equations can be applied to aid in the design of electrodes by comparing silicon-graphite and tin ...
Manuel Otero   +4 more
doaj   +2 more sources

Tropospheric and Ionospheric Modeling Using GNSS Time Series in Volcanic Eruptions (La Palma, 2021)

open access: yesEngineering Proceedings, 2023
The signal coming from the artificial satellites of the GNSS system suffers various effects that considerably decrease the precision in solving the positioning problem. To mathematically model these effects, the atmosphere is divided into two main parts,
Paola Barba   +6 more
doaj   +1 more source

Geodynamic Modeling in Central America Based on GNSS Time Series Analysis—Special Case: The Nicoya Earthquake (Costa Rica, 2012)

open access: yesEngineering Proceedings, 2023
GNSS systems allow precise resolution of the geodetic positioning problem through advanced techniques of GNSS observation processing (PPP or relative positioning).
Paola Barba   +5 more
doaj   +1 more source

Mezclando los Colores del Universo, Una Experiencia Astronómica desde las Artes

open access: yesGóndola, Enseñanza y Aprendizaje de las Ciencias, 2023
La Astronomía es considerada una de las ciencias fundamentales del conocimiento humano. Además, se trata de un área interdisciplinaria en la que confluyen diferentes campos como las Matemáticas, la Física, la Biología, las ingenierías, las artes, entre ...
Yeni Marcela Marmolejo López   +2 more
doaj   +1 more source

Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling [PDF]

open access: yes, 2017
In the mutualism established between legumes and soil bacteria known as rhizobia, bacteria from soil infect plants roots and reproduce inside root nodules where they fix atmospheric N2 for plant nutrition, receiving carbohydrates in exchange.
Knopoff, Damián Alejandro   +4 more
core   +2 more sources

Constraints on barotropic dark energy models by a new phenomenological q(z) parameterization

open access: yesEuropean Physical Journal C: Particles and Fields, 2019
In this paper, we propose a new phenomenological two parameter parameterization of q(z) to constrain barotropic dark energy models by considering a spatially flat Universe, neglecting the radiation component, and reconstructing the effective equation of ...
Jaime Román-Garza   +3 more
doaj   +1 more source

2009 - Año Internacional de la Astronomía, una oportunidad para promover la ciencia

open access: yesEducación Química, 2018
Con el Año Internacional de la Astronomía 2009 (AIA2009), celebramos un momento crucial en la historia de la ciencia: la primera observación astronómica con un telescopio, hecha por Galileo Galilei en 1609. El invento del telescopio dio inicio a 400 años
Silvia Torres Castilleja
doaj   +1 more source

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