1,512 research outputs found
Inclusive Nucleon Emission Induced by Quasi--Elastic Neutrino--Nucleus Interactions
We study the quasi--elastic contribution to the inclusive ,
, and
reactions in nuclei using a Monte Carlo simulation method to account for the
rescattering of the outgoing nucleon. As input, we take the reaction
probability from the microscopical many body framework developed in Phys. Rev.
{\bf C70} (2004) 055503 for charged-current induced reactions, while for
neutral currents we use results from a natural extension of the model described
in that reference. The nucleon emission process studied here is a clear signal
for neutral--current neutrino driven reactions, that can be used in the
analysis of future neutrino experiments.Comment: 23 pages, 17 figures; Version 2: few typos correcte
Quantum optical signals in telecommunication networks
Introducción a una red óptica metropolitana cuántica donde señales cuánticas y convencionales son multiplexadas en longitud de onda utilizando bandas separadas del espectro óptico. El enrutado se realiza con componentes pasivos para no perturbar los qubits. Se estudian dos redes: red de acceso WDM-PON y red metropolitana completa con backbone DWDM y redes de acceso WDM-PON
Inner-Hair Cells Parameterized-Hardware Implementation for Personalized Auditory Nerve Stimulation
In this paper the hardware implementation of an inner hair cell model is presented. Main features of the design are the use of Meddis’ transduction structure and the methodology for Design with Reusability. Which allows future migration to new hardware and design refinements for speech processing and custom-made hearing aid
Recent Developments in Chiral Unitary Dynamics of Resonances
In this talk I summarize recent findings made on the description of axial
vector mesons as dynamically generated states from the interaction of
peseudoscalar mesons and vector mesons, dedicating some attention to the two
states. Then I review the generation of open and hidden charm
scalar and axial states. Finally, I present recent results showing that the low
lying baryon resonances for S=-1 can be obtained as bound states or
resonances of two mesons and one baryon in coupled channels dynamics.Comment: Talk at the International Conference on Hadron Physics, Troia07,
Canakkale, Turkey, Sep. 2007 and at the Chiral Symmetry in Hadron and Nuclear
Physics Workshop, Chiral07, Osaka, November 200
Cylinder-to-cylinder high-pressure exhaust gas recirculation dispersion effect on opacity and NOx emissions in a diesel automotive engine
[EN] The objective of the study is to determine the effect of the high-pressure exhaust gas recirculation dispersion in automotive diesel engines in NOx and smoke emissions in steady engine operation. The investigation quantifies the NOx and smoke emissions as a function of the dispersion of the high-pressure exhaust gas recirculation among cylinders. The experiments are performed on a test bench with a 1.6-L automotive diesel engine. In order to track the high-pressure exhaust gas recirculation dispersion in the intake pipes, a valves system to measure CO2, that is, exhaust gas recirculation rate, was installed pipe to pipe. In addition, a valves device to measure NOx emissions cylinder to cylinder in the exhaust was installed. Moreover, a smoke meter device was installed downstream the turbine, to measure the effect of the high-pressure exhaust gas recirculation dispersion on smoke emissions. Five different engine speeds were studied with different torque levels; thus, the engine map was widely studied, from 1250 to 3000 r/min and between 6 and 20 bar of brake mean effective pressure. The exhaust gas recirculation rate varies between 4% and 25% depending on the operating point. The methodology focused on experimental tools combining traditional measuring devices with a specific valves system, which offers accurate information about species concentration in both the intake and the exhaust manifolds. The study was performed at constant raw NOx emissions to observe the effect of the exhaust gas recirculation dispersion in the opacity and fuel consumption. The study concludes that when the exhaust gas recirculation dispersion is low, the opacity presents reduced values in all operating points. However, above a certain level of exhaust gas recirculation dispersion, the opacity increases dramatically with different slopes depending on the engine running condition. This study allows quantifying the exhaust gas recirculation dispersion threshold. In addition, the exhaust gas recirculation dispersion could contribute to increase the fuel consumption up to 3.5%.Macian Martinez, V.; Luján, JM.; Climent, H.; Miguel-García, J.; Guilain, S.; Boubennec, R. (2021). Cylinder-to-cylinder high-pressure exhaust gas recirculation dispersion effect on opacity and NOx emissions in a diesel automotive engine. International Journal of Engine Research. 22(4):1154-1165. https://doi.org/10.1177/1468087419895401S1154116522
Agilidad, flexibilidad de producción e innovación en la empresa manufacturera española
Este artículo analiza en una muestra de empresas manufactureras españolas la relación de la producción ágil con el esfuerzo interno y la cooperación externa en innovación tecnológica. Los resultados del estudio indican que las empresas con mayor capacidad de agilidad utilizan con más intensidad un amplio conjunto de tecnologías agiles de desarrollo, fabricación y suministro. Las empresas más ágiles también cooperan externamente más en innovación y dicha cooperación modera la flexibilidad de producción de las empresas, indicando con ello que, gracias a la cooperación externa en innovación las empresas con menor flexibilidad de producción pueden aun así conseguir mayor capacidad de agilidad
The Mediating Role of Brown Fat and Skeletal Muscle Measured by 18F-Fluorodeoxyglucose in the Thermoregulatory System in Young Adults
The authors would like to thank all the participants who took part in
this investigation. This study is part of a PhD thesis conducted in the
Biomedicine Doctoral Studies of the University of Granada, Spain. We
are grateful to Alberto Quesada-Aranda for helping with the development of the Temperatus software (free trial at http://profith.ugr.es/
temperatus?lang=en). We are grateful to Ms Carmen Sainz-Quinn for
assistance with English-language editingObjective: This study aimed to examine whether brown adipose tissue (BAT) or skeletal muscle activity
mediates the relationship between personal level of environmental temperature (Personal-ET) and wrist skin
temperature (WT). Moreover, we examined whether BAT and skeletal muscle have a mediating role between
Personal-ET and WT (as a proxy of peripheral vasoconstriction/vasodilation).
Methods: The levels of BAT were quantified by cold-induced 18F-fluorodeoxyglucose–positron emission
tomography/computed tomography scan and measured the Personal-ET and WT by using iButtons (Maxim
Integrated, Dallas, Texas) in 75 participants (74.6% women).
Results: The study found that BAT volume and metabolic activity played a positive and significant role (up
to 25.4%) in the association between Personal-ET and WT. In addition, at the coldest temperatures, the
participants with lower levels of WT (inducing higher peripheral vasoconstriction) had higher levels of BAT
outcomes, whereas in warm temperatures, participants with higher levels of WT (inducing higher peripheral
vasodilation) had lower levels of BAT outcomes. The study did not find any mediating role of skeletal muscle
activity.
Conclusions: BAT volume and metabolic activity play a role in the relationship between Personal-ET and
WT. Moreover, the data suggest that there are two distinct phenotypes: individuals who respond better to
the cold, both through nonshivering thermogenesis and peripheral vasoconstriction, and individuals who
respond better to the heat.This study was supported by the Spanish Ministry of Economy and Competitiveness, Fondo de Investigación Sanitaria del Instituto de Salud Carlos III (PI13/01393), Retos de la Sociedad (DEP2016‐79512‐R), and Fondos Estructurales de la Unión Europea (FEDER); by the Spanish Ministry of Education (FPU 13/04365); by the Fundación Iberoamericana de Nutrición; by the Redes Temáticas de Investigación Cooperativa RETIC (Red SAMID RD16/0022); by AstraZeneca HealthCare Foundation; by the University of Granada, Plan Propio de Investigación 2016, Excellence actions: Units of Excellence; Unit of Excellence on Exercise and Health (UCEES); and by the Junta de Andalucía, Consejería de Conocimiento, Investigación y Universidades and European Regional Development Fund (ERDF), ref. SOMM17/6107/UGR, Programa Contratos‐Puente. MAR is supported by a predoctoral research grant from University Jaume I (PREDOC/2015/13). AMN was supported by the Ministry of Economy and Competitiveness, the Instituto de Salud Carlos III through the Centro de Investigación Biomédica en Red Fragilidad y Envejecimiento Saludable (CB16/10/00239), and grant 19899/GERM/15 (cofinanced by FEDER)
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