Listar FRD - Investigación - Ciencia y Tecnología por fecha de publicación
Mostrando ítems 1-20 de 149
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Molecular rotational diusion detected by dierential fluorescence energy
(2000-03-01)In this paper, we present a complete study of the influence of the molecular rotational diffusion movement in the fluorescence signal when a sample is excited by two short pulses. The study includes the calculations of ... -
Fast scanner with position monitor forlargeopticaldelays
(2001-11-01)Wepresent a new fastscansystemthatemploys a stepper motor used in a single steposcillatingmode and a position monitor devicebasedon a diode laser. Thesetupusedgeneratesdelays as large as 105 ps at 10 Hz, with 100% dutycycle. ... -
Wide band interferometryforthicknessmeasurement
(2003)In thisworkwepresentthe concept of wide band interferometry as opposed to white-light interferometry to introduce a thickness measurementmethodthatgainsprecisionwhenthebandwidthisreduced to anadequatecompromise in order ... -
Simultaneous measurement of deformation and thickness change in polymer films
(2006-08-14)We present experimental results in deformation measurement and thickness change in polymer films employing Fourier domain interferometry. The set-up is a Michelson configuration in which interference signal betweeen light ... -
Numerical model of UOE steel pipes: Forming processand structural behavior
(ASOCIACIÓN ARGENTINA DE MECÁNICA COMPUTACIONAL AMCA, 2007)Deepwater pipelines are designed to withstand, without collapsing, the external pressureand bending imposed on them, either by the laying process or by the topology of the sea bottom. In previous publications CINI researchers ... -
Limitations due to the detector in the low coherence interferometry
(2008-02-15)Se describirá como se generan las señales de interferometria de baja coherencia en el espacio de Fourier, se determinara las características que determinan el rango dinámico del sistema y las señales asociadas al sistema ... -
Simple method for thickness measurement in opaque samples with a Michelson-Sagnac interferometer
(2008-04-24)We present in this work a method to measure thicknesses of opaque samples. The technique combines the use of low coherence interferometry with a Michelson-Sagnac configuration. This ring set-up let us to measure both faces ... -
Characterization of reference standards for dirt by Laser Ablation Induced Photoacoustics (LAIP)
(2009-07-23)Measurements of surface cleanliness and dirt characterization are important problems in a wide range of processes in industry and production. Standard methods are in most cases cumber some laboratory procedures that must ... -
Ruido Magnético Barkhausen y Emisión Magneto Acústica en probetas de aleación Fe-1 wt % Cu
(2009-11)Tanto el Ruido Barkhausen (RB) como la Emisión Magneto Acústica (EMA), en materiales ferromagnéticos, dependen de las características microestructurales de los mismos y forman parte de las técnicas de caracterización no ... -
Eigenfrequencies of generally restrained Timoshenko beams with an internal hinge
(ASOCIACIÓN ARGENTINA DE MECÁNICA COMPUTACIONAL AMCA, 2010-11)This paper deals with the free transverse vibration of a Timoshenko beam with endselastically restrained against rotation and translation, and an arbitrarily located internal hingeincluding intermediate elastic constraints. ... -
Estudio sobre formas modales en vigas con restricciones elásticas intermedias.
(ASOCIACIÓN ARGENTINA DE MECÁNICA COMPUTACIONAL AMCA, 2011-11)El análisis dinámico de elementos estructurales es un importante procedimiento de diseño. Un entendimiento adecuado de las vibraciones libres es crucial para el diseño y la evaluación del comportamiento de un sistema ... -
A Study on Mode Shapes of Beams with Internal Hinges and Intermediate Elastic Restraints
(ASOCIACIÓN ARGENTINA DE MECÁNICA COMPUTACIONAL AMCA, 2012-11)Dynamic analysis of structural elements becomes an important design procedure. Anadequate understanding of the free vibration is crucial to the design and performance evaluation of a mechanical system. This work deals with ... -
Boundary and Eigenvalue Problems for Anisotropic Plates with Several Internal Line Hinges
(ASOCIACIÓN ARGENTINA DE MECÁNICA COMPUTACIONAL AMCA, 2012-11)The present paper deals with the free transverse vibration of a tapered anisotropic plate with several arbitrarily located internal line hinges and non-smooth boundary, elastically restrained against rotation and ... -
Resultados numéricos y experimentales para el análisis de vibraciones libres en una placa rectangular delgada
(2012-11)El análisis de vibraciones libres en estructuras es una condición fundamental de diseño en ingeniería. Es ampliamente conocido que las frecuencias naturales y sus correspondientes formas modales son los valores ... -
Plasmon-induced photochemical synthesis of silver triangular prisms and pentagonal bipyramids by illumination with light emitting diodes
(2013)We have grown silver prisms and pentagonal bipyramids, induced by plasmon excitation on a colloidal solution under the irradiation of light emitting diodes of different colors. Two methods of synthesis of the seeds were ... -
Variational approach of Timoshenko beams with internal elastic restraints
(2013)An exact approach for free transverse vibrations of a Timoshenko beam with ends elastically restrained against rotation and translation and arbitrarily located internal restraints is presented. The calculus of variations ... -
Optical coherence tomography-based scanning system for shape determination, wall thickness mapping, and inner inspection of glass containers
(2013-02)In this work we present a method that enables simultaneous measurement of shape and wall parameters of glass containers. The system is based on the optical coherence tomography technique, employing the spectral domain ... -
Natural vibrations of anisotropic plates with several internal line hinges
(Sprimger Link, 2013-05-29)This paper deals with the free transverse vibration of anisotropic plates with several arbitrarily located internal line hinges and piecewise smooth boundaries, elastically restrained against rotation and translation. The ... -
Vibraciones libres de placas rectangulares con fisuras
(2013-11)El estudio de problemas de vibraciones de placas con fisuras es de interés en ingeniería para ciertas aplicaciones estructurales. La presencia de una fisura en una placa en general provoca una disminución de la rigidez y ... -
Vibraciones de un pórtico de dos tramos con restricciones elásticas y dos rotulas elásticamente restringidas
(ASOCIACIÓN ARGENTINA DE MECÁNICA COMPUTACIONAL AMCA, 2013-11)El análisis del comportamiento dinámico de componentes estructurales es un estudio esencial en problemas de ingeniería. Particularmente, el estudio de las vibraciones libres de pórticos es un análisis típico cuando se ...