Papers by Edgar Hernandez Duran
This article presents the fabrication of Long Period Gratings in Optical Fiber (LPFGs) applied to... more This article presents the fabrication of Long Period Gratings in Optical Fiber (LPFGs) applied to the sensing loops. In implementing the manufacturing method used a commercial splicer fiber optic (FiTel S-175), capable of being programmed to a short section of standard optical fiber (SMF28) is taken at intervals between shots in a range from 400μm to of 650μm. The LPFGs Being able to obtain through attenuation bands above 20 dB, while the wavelength of central attenuation is close to 1550nm. We shows the experimental scheme to measure curvatures with diameters ranging between 12 and 13.1cm, having a linear variation of peak output cut at the LPFGs with tuning of 17nm.
In this paper a recurrent neural network is used as associative memory for pattern recognition. T... more In this paper a recurrent neural network is used as associative memory for pattern recognition. The goal of associative memory is to retrieve a stored pattern when enough information is presented in the network input. The network is training with twelve bipolar patterns to determine the corresponding weights. The weights are calculated by means of support vector machines training algorithms as the optimal hyperplane and soft margin hyperplane. Once the neural network is trained its performance is evaluated to retrieval stored patterns which correspond to characters encoded as bipolar vectors.
Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics
A detailed study is presented of the expected performance of the ATLAS detector. The reconstructi... more A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance of b-tagging and the trigger. The physics potential for a variety of interesting physics processes, within the Standard Model and beyond, is examined. The study comprises a series of notes based on simulations of the detector and physics processes, with particular emphasis given to the data expected from the first years of operation of the LHC at CERN.
Design and characterization of a pH optical fiber sensor with a pH sensitive dye is described in ... more Design and characterization of a pH optical fiber sensor with a pH sensitive dye is described in this paper. TEOS (Tetra-ethyl-Orto-Silicate) was used to dope a plastic optical fiber, which will be used as the optical probe (OPTRODE). The sensor is prepared by fixing the doped plastic fiber on a fused ortosilica block surface with blue bromophenol. The fiber surface charged with silica modified the refractive index, which plays an important roll on the fiber, modifies the conditions of light propagation into the plastic optical fiber. The fiber transmittance is used to measure the pH of a solution or a fluid in a range between 4 and 7; such signal is captured by a photodetector and processed with a LabView program. The advantage of this system is that, 2cm of doped fiber are enough to measure the pH of a fluid in real time. The time response of the sensor reported in the present study is approximately 10s.
Clinica Chimica Acta, 2010
Recibido el 3 de marzo de 2010; aceptado el 3 de junio de 2010
El razonamiento inductivo y deductivo dentro del proceso investigativo en ciencias experimentales... more El razonamiento inductivo y deductivo dentro del proceso investigativo en ciencias experimentales y sociales Laurus, vol. 12, núm. Ext, 2006, pp. 180-205, Universidad Pedagógica Experimental Libertador Venezuela ¿Cómo citar? Fascículo completo Más información del artículo Página de la revista Laurus, ISSN (Versión impresa): 1315-883X suleimabu@cantv.net Universidad Pedagógica Experimental Libertador Venezuela
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Papers by Edgar Hernandez Duran