A5038275219- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Building materials and conservation
- Geological and Geochemical Analysis
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Clay minerals and soil interactions
- Cultural Heritage Materials Analysis
- Photonic and Optical Devices
- Zeolite Catalysis and Synthesis
- Advanced Fiber Laser Technologies
- Nanoporous metals and alloys
- Tunneling and Rock Mechanics
- Corrosion Behavior and Inhibition
- Oil and Gas Production Techniques
- Chemical Synthesis and Characterization
- Material Selection and Properties
- Innovative concrete reinforcement materials
- Structural Behavior of Reinforced Concrete
- Fiscal Policy and Economic Growth
- Laser Material Processing Techniques
- Fiber-reinforced polymer composites
- Engineering and Information Technology
- Mesoporous Materials and Catalysis
- Mechanical Behavior of Composites
Ecopetrol (Colombia)
2024
Universidad de La Laguna
2008-2023
Universidad de Extremadura
2002
Cornell University
1999
Abstract This research is a contribution to the mineralogical and physical–mechanical characterisation of ignimbrites from Arucas (Gran Canaria Island), used as building stones under commercial names "Piedra de Lomo Tomás León" Rosa Silva". stone has been for more than five hundred years part local architectural heritage, but also exported other regions world. To perform this characterisation, chemical analysis was carried out using X-ray fluorescence (XRF), petrographic properties were...
Abstract The objective of this study is to evaluate the petrophysical properties four ignimbrites employed as dimension stones. natural stone under produced in Tenerife Island (Spain) commercial brand name Piedra Chasnera and are differentiated according their chromatic variety into: brown, violet, grey green. To assess suitability for feasible applications, it essential have a comprehensive knowledge its properties. In respect, mineralogical, petrographic chemical were obtained by X-ray...
The aim of this research work was to determine and analyse the mechanical properties a group four varieties ignimbrites, which are differentiated according their colour: brown, violet, grey green. These ignimbrites mined in southern part Tenerife (Canary Islands) widely used as building stone. Mechanical characterisation carried out by determining: ultrasound propagation velocity, uniaxial compressive strength, flexural strength under concentrated load, point load Schmidt hammer rebound...
A local nanocrystalline formation in a neodymium doped strontium barium niobate (SBN) glass has been obtained under argon laser irradiation. The intense emission around 880 nm, originated from the F43/2 (F45/2) thermalized level when structure changes to ceramic due irradiation of beam, studied. intensities and lifetimes change this inside outside irradiated area made by excitation. They have analyzed demonstrated that desvitrification process successfully achieved. These results confirm...
Red, green, and blue stimulated emissions have been achieved in Ho3+ doped oxyfluoride glass ceramic at room temperature. The material shows three emission bands the red (650 nm), green (545 (488 nm) regions under infrared excitation 750 nm. These are caused by a photon avalanche upconversion process previously reported. A pump probe experimental setup has designed to show bands. power threshold for positive gain 490 nm band estimated around 2.7 kW/cm2. Higher thresholds expected other
Evanescent-wave-coupled gain microresonators suffer from inherent low efficiency under transversal pumping because they are based on the only in evanescent field region of whispering gallery modes (WGMs) resonator. In this paper we demonstrate a new coupling scheme that remarkably enhances WGM laser. A glass fiber is used as microresonator and semiconducting polymer solutions media. single pump beam to produce laser an optically induced liquid waveguide, which confines amplified spontaneous...
The effects of intense pulsed high power ion beam (HPIB) treatment ultra-high strength polyethylene (UHSPE) fibers on the fiber/epoxy resin interface were studied. For this study, argon ions used to treat Spectra™ 1000 in vacuum. Chemical and topographical changes fiber surfaces characterized using Fourier transform infrared spectroscopy attenuated total reflectance mode (FTIR-ATR), X-ray photoelectron (XPS), dynamic wettability measurements, scanning electron microscopy (SEM). interfacial...
Glass fibers in the shape of wool were obtained at laboratory scale from three samples basaltic rocks Tenerife Island. The rockwool is widely used as thermal and acoustical insulation. ability these to be fiberized was studied by means viscosity curves can quite improved adding calcium magnesium. experimental directly or mixed with either CaCO3 CaMg(CO3)2 ye characterized terms chemical composition, microstructure mechanical properties. These properties compared ones determined for four...
Abstract An operator in Colombia applied a splitter well arrangement for the first time to provide an optimal directional drilling design and execution strategy based on cutting edge surveying technology, data analytics, calibrated magnetic scan model. The faced challenges of potential collision scenarios with pressure risk. Knowledge-sharing from operation offers benchmark trajectory methodologies aid addressing complexities associated drilling. For time, implemented gyro-while-drilling...