Artículos y presentaciones en CongresosNo Descriptionhttps://digital.cic.gba.gob.ar/handle/11746/16522024-03-29T07:36:40Z2024-03-29T07:36:40Z201Acondicionamiento acústicoIxtaina, Pablo Rubenhttps://digital.cic.gba.gob.ar/handle/11746/88732019-02-15T20:01:59Z2018-06-01T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: I Encuentro de Centros Propios y Asociados de la CIC
dcterms.abstract: El plan tiene como objetivo el estudio y mejora del entorno acústico de diversos ámbitos, en base al adecuado uso de materiales absorbentes y aislantes del sonido. A continuación, se definen las tres líneas de trabajo.
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dc.title: Acondicionamiento acústico
2018-06-01T00:00:00ZAlumbrado público eficiente y “ciudades inteligentes”: reconversión led, telegestión y monitoreo de ruido ambienteIxtaina, Pablo Rubenhttps://digital.cic.gba.gob.ar/handle/11746/107552020-12-14T20:01:48Z2020-11-01T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: Encuentro de Centros CIC (La Plata, 2020)
dcterms.abstract: La implementación de Tecnología 4.0 en ciudades (Ciudad Inteligente –Smart Cities-) tiene un eje en la explotación de las instalaciones de alumbrado público. Es inimaginable un espacio urbano sin iluminación, aseveración que nos permite pensar en una red existente, con nodos distanciados en no más de 15 m y con posibilidades de suministrar potencia eléctrica. La “Telegestión del Alumbrado” constituye un primer paso en el desarrollo de la ciudad inteligente y nos brinda múltiples posibilidades: gestión del alumbrado, control de fallas, medición y monitoreo, etc.
El Proyecto toma como base la reconversión a LED del alumbrado público: el paso de una tecnología “electromecánica” a otra totalmente electrónica. Esto nos permite concebir a la luminaria de alumbrado público no ya como punto final sino como un nodo en la red. Por un lado, el plan aborda la eficiencia energética de un modo integral: eficacia lumínica de la fuente, operación del sistema, baja en costos de mantenimiento y reposición. Por otra parte, la telegestión permite explorar el monitoreo del ruido ambiente y su contribución a la generación de registros (mapas de ruido) y estrategias de control. Sobre este punto, el Proyecto se complementa con las investigaciones realizadas en el campo de la acústica, que incluye el desarrollo de técnicas de evaluación de ruido, reglamentación y legislación.
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dc.title: Alumbrado público eficiente y “ciudades inteligentes”: reconversión led, telegestión y monitoreo de ruido ambiente
2020-11-01T00:00:00ZArgentinean Experience in Highways Led LightingIxtaina, Pablo RubenArmas, Alejandro AndrésBannert, Braian DemianBufo, Nicoláshttps://digital.cic.gba.gob.ar/handle/11746/58052017-11-09T13:15:40Z2017-01-01T00:00:00Zdc.type: Artículo
dcterms.isPartOf.*: Informe de personal de apoyo: Bufo, Nicolás (2017); Informe de personal de apoyo: Bannert, Braian Demian (2017); vol. 7, nº 1; Energy and Environment Research
dcterms.abstract: The impact of led luminaries on road lighting has modified traditional design patterns. The technological change proposes an installation with a higher prime cost and less energy consumption. On the one hand, the price ratio between led luminary and traditional luminary is at least 3:1. On the other, the led better energetic efficiency could allow keeping proper illumination levels with less installed power. In this frame, since mid 2013, the road concessionaires of highways which constitute the Access Network to Buenos Aires city (Argentina), together with Urban Highways of the mentioned city, began a restructuring process of their lighting systems to led technology.
Framed in a review of efficiency concepts and energetic classification for road lighting installations, the work presents the main results of the previous evaluation tests and of the reconverted installations, which can be considered as the first led applications at large scale on road lighting of the region.
dcterms.publisher: Canadian Center of Science and Education
dc.description.*: Submitted by Daniel Tomeo (d_tomeo@yahoo.com) on 2017-06-05T15:08:30Z workflow start=Step: CIC-ADMIN_review - action:claimaction
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dc.title: Argentinean Experience in Highways Led Lighting
2017-01-01T00:00:00ZAuditory environmental context affects visual distance perceptionVergara, RamiroAbregú, EzequielEtchemendy, PabloEguía, ManuelCalcagno, EstebanVechiatti, Nilda SusanaIasi, Federico Martínhttps://digital.cic.gba.gob.ar/handle/11746/53092017-03-10T13:01:26Z2016-09-05T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: ICA 2016; XXII International Congress on Acoustics (Buenos Aires, 5 al 9 de septiembre de 2016)
dcterms.abstract: To perceive the distance to an object through the visual modality, an observer uses a variety of cues, many of which may not be directly related to the target. This is illustrated by the fact that in a well-lit environment (with multiple visual cues) visual distance perception (VDP) is relatively accurate, whereas in a dark environment (where the observer can only see the target) VDP be- comes inaccurate. Besides, a number of recent studies indicate that VDP is not only affected by the availability and reliability of depth cues, but also can be influenced by the context even in the presence of multiple visual cues. Here we provide evidence that VDP is influenced by the auditory environmental context through reverberation-related cues. We conducted VDP experi- ments in two dark rooms with extremely different reverberation times: an anechoic chamber and a reverberant room. We first show that the distance to a visual object located in the reverberant chamber was perceived significantly farther than the same target located at the same distance in the anechoic chamber. The results also show that the maximum distance perceived by partic- ipants correlated significantly with the perceived size of the room. In addition, participants who performed the experiment in the reverberant room reported a perceived size greater than those who performed the experiment in the anechoic chamber although both rooms are of similar sizes. Secondly we note that by separating participants between musicians and non-musicians only the former group perceived differences in the size of the room through auditory modality; moreover, only this group perceived the distance to the visual object in the reverberant chamber farther than in the anechoic chamber. On the other hand, the group of non-musicians did not perceive dif- ferences in the size of both rooms or in the perceived distance in both chambers. These results show that the auditory environment can influence the VDP, presumably by reverberation cues related to auditory perception of the size of a room.
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dc.title: Auditory environmental context affects visual distance perception
2016-09-05T00:00:00ZBiobased porous acoustical absorber made from polyurethane and waste tires particlesSoto, GuillermoVechiatti, Nilda SusanaMarcovich, NormaIasi, Federico MartínMosiewicki, MirnaArmas, Alejandro Andréshttps://digital.cic.gba.gob.ar/handle/11746/53102017-03-10T13:13:03Z2016-09-05T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: ICA 2016; XXII International Congress on Acoustics (Buenos Aires, 5 al 9 de septiembre de 2016)
dcterms.abstract: The production of flexible polyurethane foams (FPF) incorporating bio/recycled raw materials is an interesting alternative to conventional acoustic absorbent materials. In this sense, bio-based polyols like glycerol or hydroxylated methyl esters derived from tung oil as multifunctional polyols, and waste tires particles as fillers with capability for acoustical absorption and low thermal conductivity, are prospective feedstocks for FPF preparation. In this work, FPF were prepared by adding different amounts of these components to a formulation based on a commercial polyether polyol. Results of normal sound absorption coefficient measurements at different frequencies, scanning electron microscopy analysis and compression tests are presented and discussed. The addition of waste tires particles or glycerol to the commercial formulation gives good performance as acoustic absorbers from 400 500 Hz, with NRC and SAA values near and above 50%. Moreover, the absorption coefficient reaches high values mostly at the highest evaluated frequencies (~62-89% at 2000 Hz and ~70-91% at 5000 Hz), for 30 mm thickness samples. On the other hand, the obtained FPF presented enhanced both the modulus and yield stress and in all the cases, a high recovery of the strain (>90%) applied in compression tests was attained after 24 hours. Scanning electron microscopy micrographs revealed that the obtained foams present a combination of open and closed cell structures and both, the modifiers and particles, tend to decrease the cell size. Based on acoustical and mechanical performance, and morphological analysis, the results show that these new kind of materials could be innovative sound absorbers, cheaper and environmentally more convenient in comparison with other available materials.
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dc.title: Biobased porous acoustical absorber made from polyurethane and waste tires particles
2016-09-05T00:00:00ZColour appearance in led lightingIxtaina, Pablo RubenPresso, MatíasBredice, Fausto OsvaldoBazalar Vidal, Pedrohttps://digital.cic.gba.gob.ar/handle/11746/19632016-04-21T15:29:50Z2010-10-12T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: 2010; AIC Interim Meeting
dcterms.abstract: The paper shows a comparative study of colour comparison between white LED lamps and conventional ones (incandescent and compact fluorescent). The LED lamps used were a model designed by the direct replaces of halogen incandescent lamps. The technology used for white light generation was based on short waves emitter chips and secondary emission. As result of the experience, significant object colour coordinates displacements in LEDs lighting were observed. As it was predictable from LEDs spectral distribution, orange – red colours were poorly reproduced. However, the subjective experience did not show a remarkable preference to the conventional light sources. Furthermore, several observers qualified the objects under LEDs light as “more naturals”.
dc.description.*: Submitted by Matias Presso (matiaspresso@gmail.com) on 2016-04-21T13:51:38Z workflow start=Step: CIC-ADMIN_review - action:claimaction
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dc.title: Colour appearance in led lighting
2010-10-12T00:00:00ZDesarrollo de un equipo para evaluación de capacidad auditiva basado en emisiones otoacústicas (OAE)García, Pablo A.Spinelli, Enrique M.Guaraglia, Dardo O.Daffunchio, MartínBonti, HoracioVelis, Ariel GustavoBerreta, Ricardohttps://digital.cic.gba.gob.ar/handle/11746/42932016-09-23T12:00:12Z2011-04-01T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: I Jornadas; Jornadas de Investigación y Transferencia
dcterms.abstract: En este trabajo se presenta uno de los últimos desarrollos transferidos desde la UID Gitec. El mismo consiste en el desarrollo de un equipo para evaluar la capacidad auditiva basado en emisiones otoacústicas (OAE). Estos equipos permiten evaluar la capacidad auditiva de un sujeto en forma objetiva, es decir, sin requerir respuestas por parte del paciente. Estas técnicas permiten detectar problemas de audición en pocos minutos con sólo introducir una sonda en el canal auditivo. La utilización de OAE es relativamente reciente y su campo de aplicación se concentra principalmente en neonatos para la detección temprana de hipoacusias. En nuestro país, a partir de la promulgación en el año 2001 de la ley 25415 del Programa Nacional de detección de Hipoacusia se ha incluido dentro del plan de estudios a realizar a los recién nacidos. El presente desarrollo surgió a requerimiento de una empresa del ámbito local que desarrolla y produce tecnología médica para audiología desde hace más de 30 años (LADIE: Laboratorio de Aplicación y Desarrollo de Instrumental Electrónico). El principal objetivo es sustituir la importación de este tipo de equipamiento (de origen europeo o norteamericano), lo que trae aparejado un muy alto costo de inversión inicial y mantenimiento, como así también demoras en las reparaciones y mantenimiento de los mismos.
dc.description.*: Submitted by Ariel Lira (alira@sedici.unlp.edu.ar) on 2016-07-13T21:22:48Z workflow start=Step: CIC-ADMIN_review - action:claimaction
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dc.title: Desarrollo de un equipo para evaluación de capacidad auditiva basado en emisiones otoacústicas (OAE)
2011-04-01T00:00:00ZDevelopment of a computational tool to analyze sounds: A biological study with anuranSalgado Costa, CarolinaCantillo, FranciscoIasi, Federico MartínVechiatti, Nilda SusanaNatale, Guillermohttps://digital.cic.gba.gob.ar/handle/11746/53082017-03-10T12:51:41Z2016-09-05T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: ICA2016; XXII International Congress on Acoustics (Buenos Aires, 5 al 9 de septiembre de 2016)
dcterms.abstract: The emission of underwater sounds in anuran tadpoles has been documented in only two species from Argentina and one from Madagascar. Underwater sound emission by Ceratophrys ornata (Anura: Ceratophryidae) tadpoles was a novel finding reporting the first evidence in anuran larvae. The sound has been described as part of an antipredator mechanism that diminishes the frequency of predation between conspecifics. The aim of the study was to describe sound variability from tadpoles to adults with a novel technique in bioacoustics. Sounds emitted by tadpoles were both recorded underwater and out of water. The recording system consisted of a microphone and an interface coupled with a laptop. It was first calibrated with an acoustic reference source and compensated in order to obtain a recording system with flat frequency response. Audio recordings were digitalized, and post processed by a computational tool specifically developed in a numerical environment software. Variables selected to describe basic structure of sounds were: sound duration, number of pulses, number of inter pulses and dominant frequency. These variables were supplemented with typical acoustic parameters, such as equivalent continuous pressure level, peak sound pressure level, and spectral analysis with constant bandwidth filters. The interdisciplinary experience allowed developing a reliable system of recording, analysing thousand of sounds in a short period and therefore characterizing the sound of a species considering all variability.
dc.description.*: Submitted by Nilda Vechiatti (nildavec@gmail.com) on 2017-03-09T16:21:59Z workflow start=Step: CIC-ADMIN_review - action:claimaction
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Development-bitstream_5ce9c3b5-66f4-4f23-9204-8af49f7014e0.pdf-PDFA.pdf: 1091878 bytes, checksum: 0c672e2762d7965ed0093c32268a38a1 (MD5)
dc.title: Development of a computational tool to analyze sounds: A biological study with anuran
2016-09-05T00:00:00ZEfectos de la iluminación led en el coeficiente de luminanciaBannert, Braian DemianGallardo, Ayelénhttps://digital.cic.gba.gob.ar/handle/11746/63762018-09-24T20:01:43Z2016-11-01T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: Informe de personal de apoyo: Bannert, Braian Demian (2017); XIII Congreso Panamericano de Iluminación LUXAMÉRICA 2016 (La Serena, Chile)
dcterms.abstract: El trabajo analiza los efectos del espectro de la iluminación led en la reflexión de la luz sobre las calzadas. Tomando como eje la mejora de la Técnica de Luminancia para el alumbrado vial, se estudia la influencia del espectro de la luz incidente en el coeficiente de luminancia medio Qo, asimilable al “grado de claridad” de la calzada. Los resultados obtenidos permiten inferir cierta “selectividad espectral” en la reflexión de la luz blanca del led en las calzadas analizadas, pertenecientes a autopistas de zonas aledañas a la ciudad de Buenos Aires (Argentina). Esta “selectividad” se manifestó por un ligero incremento del coeficiente Qoo para instalaciones con iluminación led, frente a las mismas calzadas iluminadas por tradicionales lámparas de sodio alta presión.
El trabajo se complementa con mediciones de reflexión espectral de probetas de superficies de calzada, evaluadas para las condiciones de observación e iluminación estandarizadas.; The effect of led light spectra on road surfaces reflection is analyzed in the present paper. The improvement of Luminance Technique for road lighting is the central orientation of this work and for that the influence of light spectra on average luminance coefficient Qo, which can represent the “road surface lightness”, was studied. The obtained results show a “spectral selectivity” for white led light in the analyzed road surfaces, belonging to Buenos Aires City (Argentina) motorways. This “selectivity” resulted in a slight increase of luminance coefficient Qoo for led lighting installations, compared with traditional high pressure sodium lamps installations.
Additionally, the work presents spectral road surface measurements on road samples, evaluated under standard observation an illumination conditions.
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dc.title: Efectos de la iluminación led en el coeficiente de luminancia
2016-11-01T00:00:00ZEficiencia energética en reconversiones Led del alumbrado públicoBufo, Nicoláshttps://digital.cic.gba.gob.ar/handle/11746/89842019-03-20T20:01:46Z2017-01-01T00:00:00Zdc.type: Documento de conferencia
dcterms.isPartOf.*: XIII Jornadas Argentinas de Luminotecnia (San Rafael, 2017); Jornadas Argentinas de Luminotecnia
dcterms.abstract: El LAL CIC, Laboratorio de Acústica y Luminotecnia de la Comisión de Investigaciones Científicas, es el Centro Oficial de la provincia de Buenos Aires (Argentina) en lo referido a iluminación. Entre sus funciones se encuentra la asistencia técnica a municipios, actividad que tiene actualmente su eje en las reconversiones de instalaciones de alumbrado público a tecnología led. Las asistencias que se realizan abarcan múltiples aspectos: elaboración de especificaciones técnicas, estudios de la instalación, clasificación de calzadas, capacitación de personal, estudios de ofertas, pruebas de campo, etc.
El objetivo central de estas reconversiones es el aumento de la eficiencia del alumbrado y con ello el ahorro de energía. En este sentido, el trabajo presenta un estudio sobre la cuantificación de la eficiencia energética, a partir de relacionar el coeficiente de utilización de la luminaria, su eficacia y los resultados luminotécnicos obtenidos con su instalación en una determinada geometría. El índice utilizado, Densidad de Potencia Normalizada en iluminancia, PNE, permite la rápida comparación entre distintas alternativas, combinando la eficiencia propia de la luminaria, con el rendimiento real de su fotometría en la geometría particular de la calle a iluminar.
El trabajo se completa con simulaciones mediante software y el cálculo de PNE en instalaciones reales reconvertidas, lo que permite realizar una primera clasificación energética del alumbrado público para el estado actual de la tecnología.
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dc.title: Eficiencia energética en reconversiones Led del alumbrado público
2017-01-01T00:00:00Z