99 research outputs found

    BECARI@S Population by CUNY Campus-2012-2018

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    The CUNY Mexican Studies Institute (CUNY MSI) has been working to equalize the educational achievement disparities among Mexican and Mexican-American students, striving to ensure they have equal access and support for thriving in our institution and beyond. Consistent with the mission of the CUNY MSI, the Mexican Studies Scholarship Fund seeks highly motivated students, with a record of commitment to service in the immigrant and Mexican community in New York, without considering immigration status. Thus far, the Mexican Studies Scholarship Fund has awarded over 200 scholarships to students from 13 countries. On this occasion, we are presenting a visual database report, without the accompanying text, based on the preliminary report of the Mexican Studies Scholarship Fund

    Economic and Social Factors of the Mexican Community in Queens

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    In this project, we hope to better understand the educational needs of the local Mexican communities across New York. We have used data drawn from the American Community Survey (ACS) public use microsample to see how the community has changed over time. For this study, we have focused on the borough of Queens, New York, with a particular focus on several key factors such as the average individual income levels, education levels, and age. In time, this will be followed up with more detailed reports into aspects of health, poverty, and family characteristics

    Use of the Plasma Spectrum RMS Signal for Arc-Welding Diagnostics

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    A new spectroscopic parameter is used in this paper for on-line arc-welding quality monitoring. Plasma spectroscopy applied to welding diagnostics has typically relied on the estimation of the plasma electronic temperature, as there is a known correlation between this parameter and the quality of the seams. However, the practical use of this parameter gives rise to some uncertainties that could provoke ambiguous results. For an efficient on-line welding monitoring system, it is essential to prevent the appearance of false alarms, as well as to detect all the possible defects. In this regard, we propose the use of the root mean square signal of the welding plasma spectra, as this parameter will be proven to exhibit a good correlation with the quality of the resulting seams. Results corresponding to several arc-welding field tests performed on Inconel and titanium specimens will be discussed and compared to non-destructive evaluation techniques

    High Temperature Long Period Grating Thermo-Mechanically Written

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    An optical fiber transducer able to work in high temperature environments is experimentally demonstrated in the laboratory. It is based on a permanent long period grating (LPG) written using a new technique based on a thermo-mechanical approach. Device precision was experimentally checked by means of repetitive thermal cycles between 25 and 950 °C. In addition device stability was assured by maintaining the temperature in steady state at 800 °C during 23 hours

    Brillouin frequency shift of standard optical fibers set in water vapor medium

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    The dependence of the Brillouin frequency shift (BFS) on UV-cured acrylate coating and uncoated fibers for media that have different water vapor concentrations is experimentally investigated. The BFS is proportional to the temperature within the fiber, but it also depends on the water vapor contained in the surroundings of the fiber. A hypothesis based on the efficiency of the heat transfer due to the different humidity concentration in the media is proposed, and the temperature difference that depends on the heat transfer is quantified in standard fibers. A shift of ∼0.22 MHz for relative humidity change between 60% and 98% at 20°C is measure

    Objective ADHD diagnosis using convolutional neural networks over daily-life activity records

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    Attention Deficit/Hyperactivity Disorder (ADHD) is the most common neurobehavioral disorder in children and adolescents. However, its etiology is still unknown, and this hinders the existence of reliable, fast and inexpensive standard diagnostic methods. Objective: This paper proposes an end-to-end methodology for automatic diagnosis of the combined type of ADHD. Methods: Diagnosis is based on the analysis of 24 hour-long activity records using Convolutional Neural Networks to classify spectrograms of activity windows. Results: We achieve up to 97.62% average sensitivity, 99.52% specificity and AUC values over 99%. Overall, our figures overcome those obtained by actigraphy-based methods reported in the literature as well as others based on more expensive (and not so convenient) acquisition methods. Conclusion: These results reinforce the idea that combining deep learning techniques together with actimetry can lead to a robust and efficient system for objective ADHD diagnosis. Significance: Reliance on simple activity measurements leads to an inexpensive and non-invasive objective diagnostic method, which can be easily implemented with daily devices

    Demographic and Socioeconomic Landscape in Elmhurst and Corona Queens: Educational Opportunities Initiative

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    Based on the services provided by the CUNY MSI’s Educational Opportunities Initiative (EOI) and to better understand the educational needs of our constituents, on this occasion, we present an analysis on the demographic and socioeconomic landscape in Elmhurst and Corona, in Queens. For this report, we used data drawn from the American Community Survey (ACS) Public Use Microdata Sample (PUMS) and intake data collected by the EOI. We focus our analysis on several key factors, such as the average individual income levels, education levels, and age

    Efficient dynamic events discrimination technique for fiber distributed Brillouin sensors

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    A technique to detect real time variations of temperature or strain in Brillouin based distributed fiber sensors is proposed and is investigated in this paper. The technique is based on anomaly detection methods such as the RX-algorithm. Detection and isolation of dynamic events from the static ones are demonstrated by a proper processing of the Brillouin gain values obtained by using a standard BOTDA system. Results also suggest that better signal to noise ratio, dynamic range and spatial resolution can be obtained. For a pump pulse of 5 ns the spatial resolution is enhanced, (from 0.541 m obtained by direct gain measurement, to 0.418 m obtained with the technique here exposed) since the analysis is concentrated in the variation of the Brillouin gain and not only on the averaging of the signal along the time

    Desarrollo de nuevos Modelos de Edificios de progresiva dificultad, para el estudio de su representación gráfica, utilizando los sistemas de representación que permiten las aplicaciones de Cad

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    En el proceso de la definición gráfica de un edificio, conviene utilizar los sistemas de representación apropiados para cada fin que se pretende: En la representación tradicional, se utilizan las plantas/secciones horizontales, que son los diagramas de definición y construcción del edificio, y se complementan con los alzados como visión compositiva y/o adecuación con el entorno, así como con los dibujos de detalles y/o secciones verticales, que dan idea de los sistemas constructivos, alturas, nº. plantas, etc., Las nuevas tecnologías como son las aplicaciones de Cad, en su utilización en la representación de Edificios, facilitan el uso de otros tipos de representaciones que pueden ser útiles para ilustrar la naturaleza de algunos edificios, como son las axonometrías o perspectivas, y mejorar la comunicación con imágenes, videos etc. En este trabajo se desarrollan objetos arquitectónicos, con un diseño centrado en primer lugar en el estudio de su representación gráfica, a través de las aplicaciones de Cad, para el mejor entendimiento/comprensión de volúmenes/formas y espacios exterior/interior, realizando ejercicios de aplicación gráfica con una nueva forma de usar los sistemas de representación, y en segundo lugar atendiendo a las connotaciones arquitectónicas de composición, funcionalidad, estructura etc. Se concreta la investigación, en las nuevas formas de usar los sistemas de representación, con definición de proyecto básico y no en la simple aplicación de CAD: A.-objetos, con volúmenes/formas compuestas, con la dificultad propia de los objetos sin espacio interior, por lo que no se utilizan más que los dibujos de alzados, e isométricas exteriores, con una primera parte, de descripción gráfica de cómo se componen estos volúmenes, ya sea con connotaciones teóricas tipo Sección Aurea, con razones geométricas, proporciones. Ejerc.A.-Dibujar/definir con Alzados un objeto B.-objetos con aparición de los espacios interiores, (ya aparece lo interior/exterior), con hincapié en elementos comunicación vertical (escaleras, rampas etc.) espacios en doble altura, etc.. Ejerc.B.-Dibujar/definir con secc.verticales/horiz. C.-objetos con aparición de nuevos elementos interiores/exteriores, cubiertas/escaleras/huecos de fachadas, que necesitan sistemas de representación más complejos. Ejerc. C.-Dibujar/definir con axonométricas seccionadas horiz y/o vert. La presentación/composición se realiza si es posible en un solo formato A-3 horizontal con su descripción/identificación a pié de página, con los dibujos en el resto del formato, procurando que la escala sea 1/100, por cada objeto arquitectónico

    Arc-welding spectroscopic monitoring based on feature selection and neural networks

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    A new spectral processing technique designed for application in the on-line detection and classification of arc-welding defects is presented in this paper. A noninvasive fiber sensor embedded within a TIG torch collects the plasma radiation originated during the welding process. The spectral information is then processed in two consecutive stages. A compression algorithm is first applied to the data, allowing real-time analysis. The selected spectral bands are then used to feed a classification algorithm, which will be demonstrated to provide an efficient weld defect detection and classification. The results obtained with the proposed technique are compared to a similar processing scheme presented in previous works, giving rise to an improvement in the performance of the monitoring system
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