A5012547542- Experimental and Theoretical Physics Studies
- Experimental Learning in Engineering
- Advanced Chemical Physics Studies
- Scientific Research and Discoveries
- Orbital Angular Momentum in Optics
- Complex Systems and Time Series Analysis
- Engineering Education and Pedagogy
- Mechanical and Optical Resonators
- Microfluidic and Bio-sensing Technologies
- Music Technology and Sound Studies
- Radioactive Decay and Measurement Techniques
- Spectroscopy and Quantum Chemical Studies
- Cosmology and Gravitation Theories
- Atmospheric Ozone and Climate
- Electrowetting and Microfluidic Technologies
- Mental Health Research Topics
- Gas Dynamics and Kinetic Theory
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Neural dynamics and brain function
- Theoretical and Computational Physics
- Advanced Thermodynamics and Statistical Mechanics
- Spectroscopy and Laser Applications
- Advanced Electrical Measurement Techniques
- Energy Harvesting in Wireless Networks
Universitat Politècnica de València
2019-2025
Imperial College London
2016-2022
Deleted Institution
2022
University of Basel
2013-2021
Universidad Politécnica de Madrid
2019-2021
United States Air Force Research Laboratory
2016
University of Pinar del Río
2003-2014
University of Potsdam
2004
Royal Institute and Observatory of the Spanish Navy
2003
We have used a mobile phone acceleration sensor, and the Accelerometer Monitor application for Android, to collect data in physics experiments on free damped oscillations. Results period, frequency, spring constant, damping constant agree very well with measurements obtained by other methods. These widely available sensors are likely find increased use instructional laboratories.
In this work, the change of frequency a sound wave due to Doppler effect has been measured using smartphone. For purpose, speaker at rest and smartphone placed on cart an air track were used. The in was by application for Android™, 'Frequency Analyzer', which developed us specifically work. This made it possible analyze four types mechanical motions: uniform linear motion, accelerated harmonic oscillations damped oscillations. These experiments are suitable undergraduate students. main...
In this paper, smartphone acceleration sensors were used to perform a quantitative analysis of mechanical coupled oscillations. Symmetric and asymmetric normal modes studied separately in the first two experiments. third, oscillation was as combination modes. Results indicate that smartphones, which are very familiar students, represent valuable measurement instruments for introductory first-year physics courses.
The design and implementation of a multiplexed spiral phase mask in an experimental optical tweezers setup are presented. This diffractive element allows the generation multiple concentric vortex beams with independent topological charges without amplitude modulation. generalization for vortices is also shown. two different developed. We experimentally show transfer angular momentum to optically trapped microparticles by enabling nearly orbiting dynamics around axis within each vortex....
Thermal coating paints offer a passive strategy to reduce heat gain in buildings, improve ventilation, and lower energy consumption. This study investigates the effectiveness of these technologies by comparing different housing structures environmental conditions. Specifically, it examines thermal envelope solutions for cool roofs homes along Colombian Caribbean Coast. We quantify impacts using experimental data collected from 120 houses across eight municipalities Magdalena Department,...
We have undertaken a thorough dynamical investigation of five extrasolar planetary systems using extensive numerical experiments. The Gl 777 A, HD 72659, 614, 47 Uma and 4208 were examined concerning the question whether they could host terrestrial-like planets in their habitable zones (HZ). First we investigated mean motion resonances between fictitious terrestrial existing gas giants these systems. Then fine grid initial conditions for potential planet within HZ was chosen each system,...
Reactions involving N and O atoms dominate the energetics of reactive air flow around spacecraft when reentering atmosphere in hypersonic flight regime. For this reason, thermal rate coefficients for processes O(3P) NO(2Π) are relevant over a wide range temperatures. purpose, potential energy surface (PES) ground state NO2 molecule is constructed based on high-level ab initio calculations. These energies represented using reproducible kernel Hilbert space method Legendre polynomials. The...
In this work, we present a simple and low cost experiment designed to determine the infrared water absorption coefficient. We used TV remote control as point source of light. The intensity after passing light through different heights column is measured with solar cell connected speaker. recorded signal, captured smartphone sound recorder, provides practical demonstration Beer Lambert law. collected data were fitted theoretical model, obtaining very good agreement between value coefficient...
We have created a simple, portable, low-cost setup allowing the students and teachers to experiment with discuss electromagnetic induction in safe way, using low currents. The simplicity portability make these activities well suited for experiments outside of classroom, which is particularly welcome distance learning. consists two smartphones used as signal generators, small coil, loudspeakers connected coil third smartphone an oscilloscope. no doubt that cost, portable engaging elements...
We present a new simple experimental setup for demonstrating beat phenomenon. have combined two amplitude-modulated light beams on solar cell using smartphones as signal generators and third smartphone an oscilloscope to visualize the resulting wave beats. A very good agreement is obtained between theoretical model result. It innovative approach bring physics experimentation students discover potential possibilities of in basic courses.
In this work, we present a simple and low-cost experiment designed to study the oscillations of magnetic field created by cylindrical magnet under two different conditions: far short distances from sensor. A Taylor series expansion function has been done convergence polynomial real in both situations. To carry out experiment, small attached an oscillating well-known spring-mass system. The resulting registered with smartphone using magnetometer very good agreement obtained between...
In this work, we present a simple and low-cost experiment designed to study the oscillations of magnetic field created by cylindrical magnet under two different conditions: far short distances from sensor. A Taylor’s series expansion function has been done convergence polynomial real in both situations. To carry out experiment, small attached an oscillating well-known spring-mass system. The resulting registered with smartphone using magnetometer very good agreement obtained between...
A four-dimensional potential energy surface (PES) for the interaction between a rigid carbon dioxide molecule and nitrogen was constructed based on quantum-chemical ab initio calculations up to coupled-cluster level with single, double, perturbative triple excitations. Interaction energies total of 1893 points PES were calculated using counterpoise-corrected supermolecular approach basis sets quintuple-zeta quality bond functions. The extrapolated complete set limit, an analytical site-site...
A smartphone acceleration sensor is used to study two-dimensional harmonic oscillations. The data recorded by the free android application, Accelerometer Toy, determine periods of oscillation graphical analysis. Different patterns Lissajous curves resulting from superposition motions are illustrated for three experiments. This work introduces an example how oscillations can be easily studied with a sensor.
Abstract In this work, we present a new quadrifocal diffractive lens designed using the silver mean sequence. The focusing properties of these aperiodic lenses coined zone plates are analytically examined. It is demonstrated that, under monochromatic illumination, four foci located at certain reduced axial positions given by Pell numbers that can be correlated with This distinctive optical characteristic experimentally confirmed. Graphical abstract
The O(3P) + NO(2Π) → O2(X3Σg−) N(4S) reaction is among the N- and O- involving reactions that dominate energetics of reactive air flow around spacecraft during hypersonic atmospheric re-entry. In this regime, temperature in bow shock typically ranges from 1000 to 20 000 K. forward reverse rate coefficients for derived directly trajectory calculations over range are reported letter. Results compare well with established equilibrium constants same thermodynamic quantities spectroscopy gas...
Smartphone' acceleration sensors have got useful applications in standard physical situations. We taken advantage of its capabilities a number Physics experiments and perform them series examples within classical mechanical kinematic situations such as free damped oscillations due to Earth's gravity. By properly connecting the smartphones other data may be collected studied rotational motion. These experiences been carried out at Higher Technical School Design Engineering (ETSID Spanish)...
Metallic hollow nanoparticles exhibit interesting optical properties that can be controlled by geometrical parameters. Irradiation with femtosecond laser pulses has emerged recently as a valuable tool for reshaping and size modification of plasmonic metal nanoparticles, thereby enabling the synthesis nanostructures unique morphologies. In this Letter, we use classical molecular dynamics simulations to investigate solid-to-hollow conversion gold upon irradiation. Here, suggest an efficient...
The irradiation of spherical gold nanoparticles (AuNPs) with nanosecond laser pulses induces shape transformations yielding nanocrystals an inner cavity. concentration the stabilizing surfactant, use moderate pulse fluences, and size irradiated AuNPs determine efficiency process nature void. Hollow are obtained when molecules from surrounding medium (e.g., water organic matter derived surfactant) trapped during irradiation. These experimental observations suggest existence a subtle balance...
In this paper, we present the design and implementation of multi-trap optical tweezers based on new quadrifocal kinoform lenses. The phase distribution these diffractive lenses is characterized by Silver Mean sequence. focusing properties resulting aperiodic DOEs coined Kinoform Lenses (KSMLs) are numerically examined. It shown that, under monochromatic illumination, a KSML drives most incoming light into four single foci whose focal lengths related to ratio. way, improves diffraction...
Molecular dynamics simulations and both normal mode hyperspherical analyses of NO-doped Kr solid are carried out in order to get insights into the structural relaxation medium upon electronic excitation NO molecule. A combined study is reported on time evolution cage radius density vibrational states, according analyses. For modes, hyper-radial grand angular contributions considered. radial tangential examined. Results show that first shell driven by modes with frequencies at approximately...
We demonstrate the use of CCD image sensors and LCD screens from discarded electronic devices as elements for performing simple optical diffraction experiments. The experiments can determine spatial structure these components by analyzing patterns generated their interaction with monochromatic light. This article presents design results such
Abstract For several years, reports have been published about fluctuations in measured radioactive decay time-series and some instances linked to astrophysical as well classical environmental influences. Anomalous behaviors of measurement capacitance inside outside a modified Faraday cage were documented by our group previous work. In the present report, we an in-depth analysis with regard possible correlations space weather, i.e. geomagnetic activity (GMA) cosmic-ray (CRA). Our revealed...