Browsing DFis-Artículos, capítulos, libros... by Title
Now showing items 70-89 of 135
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LiH−(X2Σ+)+3,4He rotational quenching at ultralow energies: spin-flip and isotopic effects from quantum dynamics on an ionic system
(Springer, 2009)We study in this work the quantum scattering between a helium atom and a LiH− molecule at low and ultralow energies. For the noble gas we have considered the two natural isotopes 3He, 4He, plus a “mock” 3.5He. Our aim ... -
Local weather phenomenon Galerna influences daily radon concentrations in northern Iberian Peninsula
(Elsevier, 2024)One of the main factors that affect urban air quality is meteorology. The objective of this study is to understand and characterise the influence that “Galerna” (GL) (an abrupt westerly change over the northern coast of ... -
Low Electron Temperature Plasma Diagnosis: Revisiting Langmuir Electrostatic Probes
(MDPI, 2021)This article describes a method of measurement of the current-to-probe voltage characteristic curve of a Langmuir electrostatic probe immersed in a plasma characterized by a low electron temperature that is only one order ... -
Mars in situ oxygen and propellant production by non-equilibrium plasmas.
(2021)It has been recently advocated that Mars has excellent conditions for oxygen and fuel production directly from atmospheric CO2 using non-equilibrium plasmas. The Martian conditions would be favorable for vibrational ... -
Measuring the air fraction and the gas temperature in non-thermal argon plasma jets through the study of the air influence on the collisional broadening of some argon atomic emission lines
(IOP Publishing, 2020)Cold atmospheric argon plasma jets have shown to be very promising in medicine and they are being currently used for therapeutical uses such as the healing of wounds or the treatment of tumors. Because they run in the open ... -
Method of Moments Optimization of Distributed Raman Amplification in Fibers with Randomly Variying Birefringence
(MDPI, 2020)In this work, we develop a vectorial model, for optical communications, using distributed Raman amplification (DRA) applied to vectorial soliton pulses in monomode fiber optics. The main result, a dependent polarization ... -
Microwave atmospheric pressure plasma jets for wastewater treatment: Degradation of methylene blue as a model dye
(Elsevier, 2017)The degradation of methylene blue in aqueous solution as a model dye using a non thermal microwave (2.45 GHz) plasma jet at atmospheric pressure has been investigated. Argon has been used as feed gas and aqueous solutions ... -
Minimizing odor impact from urban waste by digital transformation in the city of Córdoba
(2024)Management of municipal urban waste remains challenging in societies and constitutes a key issue within the frame of “Smart cities” and sustainable development. Optimal schedule and operational procedure have traditionally ... -
Modelling N2 - O2 plasmas: volume and surface kinetics
(2019)This paper reviews the basics of kinetic modelling in low-temperature N2–O2 plasmas, including the strong coupling between electron, vibrational, chemical and surface kinetics. The main approaches to investigate each of ... -
Modulational instability in two cubic–quintic Ginzburg–Landau equations coupled with a cross phase modulation term
(Elsevier, 2010)Modulation instability is investigated in two cubic–quintic Ginzburg–Landau equations coupled with a cross phase modulation type term. After carrying out a stability analysis an expression for gain is ob tained. Some ... -
Ni/CeO2: a promising catalyst for water-gas shift
(American Chemical Society Division of Energy and Fuels, 2013)Hydrogen appears to be the best answer for the limited fossil fuel resources. The water-gas shift (WGS) reaction is a key step in the production of clean hydrogen. Noble metal (Au, Pd, Pt) clusters supported on reducible ... -
Non-diffusive nature of collisionless α-particle transport: Dependence on toroidal symmetry in stellarator geometries
(AIP Publishing, 2020)An adequate confinement of α-particles is fundamental for the operation of future fusion powered reactors. An even more critical situation arises for stellarator devices, whose complex magnetic geometry can substantially ... -
Numerical and experimental study of an Ar/CO2 plasma in a point-to-plane reactor at atmospheric pressure
(Elservier, 2020-12-10)The applicability of high voltage electrical discharge to reform Carbon Dioxide (CO2) as an environmental pollutant is a technique extensively proved. By this motive, the study of plasma with pure CO2 or its mixtures ... -
Observation of impurity accumulation and its compatibility with high plasma performance in W7-X
(2023)At the W7-X stellarator, the bolometer system has measured an intensive radiation zone in the inner plasma region (at a normalized radius ρ ∼ 0.3–0.4) in the hydrogen plasma generated by electron cyclotron resonance heating; ... -
Odour impact simulation of a large urban wastewater treatment plant through the numerical solution of a Eulerian model
(Elsevier, 2024)This study aims to develop a solver to calculate the dispersion of emitted odour from the main sources located in a large urban wastewater treatment plant (WWTP). Its seasonal odour impact on surrounding areas, including ... -
On the gas-phase graphene nanosheet synthesis in atmospheric microwave plasma torch: Upscaling potential and graphene nanosheet‑copper nanocomposite oxidation resistance
(Elsevier, 2023)Efficient gas-phase synthesis of few-layer graphene nanosheets (GNS) is based on the controlled formation of the high-temperature environment and the reaction pathway of gas-phase species formed by the decomposition of ... -
On the impact of wavelength dependency on supercontinuum generation in photonic crystal fibers
(MDPI, 2024)It is common practice when simulating propagation through an optical fiber to assume that its characteristic parameters are constant and determined solely by the central wavelength of the input pulse. In this paper, we ... -
On the quasi-stationary approach to solve the electron Boltzmann equation in pulsed plasmas
(IOP Publishing, 2021)This work analyzes the temporal evolution of the electron kinetics in dry-air plasmas (80% N2:20% O2), excited by electric-field pulses with typical rise-times of 10−9 and 10−6 s, applied to a stationary neutral gaseous ... -
On- and off-center helium atom in a spherical multilayer quantum dot with parabolic confinement
(Springer, 2023)The ground state energy of a helium atom inside a spherical multilayer quantum dot as a function of the atomic impurity location inside the quantum dot has been calculated. The multilayer quantum dot is modeled by a ... -
Optimizing high-quality graphene nanoflakes production through organic (bio)-precursor plasma decomposition
(Elsevier, 2021)Atmospheric pressure plasma-based technique for the decomposition of biofuels allows obtaining high-quality graphene powder in one step, without the use of neither metal catalysts nor specific substrates. Despite the ...