Towards hand biometrics in mobile devices

The increasing demand of security oriented to mobile applications has raised the attention to biometrics, as a proper and suitable solution for providing secure environment to mobile devices. With this aim, this document presents a biometric system based on hand geometry oriented to mobile devices, involving a high degree of freedom in terms of illumination, hand rotation and distance to camera. The user takes a picture of their own hand in the free space, without requiring any flat surface to locate the hand, and without removals of rings, bracelets or watches. The proposed biometric system relies on an accurate segmentation procedure, able to isolate hands from any background; a feature extraction, invariant to orientation, illumination, distance to camera and background; and a user classification, based on k-Nearest Neighbor approach, able to provide an accurate results on individual identification. The proposed method has been evaluated with two own databases collected with a HTC mobile. First database contains 120 individuals, with 20 acquisitions of both hands. Second database is a synthetic database, containing 408000 images of hand samples in different backgrounds: tiles, grass, water, sand, soil and the like. The system is able to identify individuals properly with False Reject Rate of 5.78% and False Acceptance Rate of 0.089%, using 60 features (15 features per finger

Towards hand biometrics in mobile devices

The increasing demand of security oriented to mobile applications has raised the attention to biometrics, as a proper and suitable solution for providing secure environment to mobile devices. With this aim, this document presents a biometric system based on hand geometry oriented to mobile devices, involving a high degree of freedom in terms of illumination, hand rotation and distance to camera. The user takes a picture of their own hand in the free space, without requiring any flat surface to locate the hand, and without removals of rings, bracelets or watches. The proposed biometric system relies on an accurate segmentation procedure, able to isolate hands from any background; a feature extraction, invariant to orientation, illumination, distance to camera and background; and a user classification, based on k-Nearest Neighbor approach, able to provide an accurate results on individual identification. The proposed method has been evaluated with two own databases collected with a HTC mobile. First database contains 120 individuals, with 20 acquisitions of both hands. Second database is a synthetic database, containing 408000 images of hand samples in different backgrounds: tiles, grass, water, sand, soil and the like. The system is able to identify individuals properly with False Reject Rate of 5.78% and False Acceptance Rate of 0.089%, using 60 features (15 features per finger

Towards hand biometrics in mobile devices

The increasing demand of security oriented to mobile applications has raised the attention to biometrics, as a proper and suitable solution for providing secure environment to mobile devices. With this aim, this document presents a biometric system based on hand geometry oriented to mobile devices, involving a high degree of freedom in terms of illumination, hand rotation and distance to camera. The user takes a picture of their own hand in the free space, without requiring any flat surface to locate the hand, and without removals of rings, bracelets or watches. The proposed biometric system relies on an accurate segmentation procedure, able to isolate hands from any background; a feature extraction, invariant to orientation, illumination, distance to camera and background; and a user classification, based on k-Nearest Neighbor approach, able to provide an accurate results on individual identification. The proposed method has been evaluated with two own databases collected with a HTC mobile. First database contains 120 individuals, with 20 acquisitions of both hands. Second database is a synthetic database, containing 408000 images of hand samples in different backgrounds: tiles, grass, water, sand, soil and the like. The system is able to identify individuals properly with False Reject Rate of 5.78% and False Acceptance Rate of 0.089%, using 60 features (15 features per finger

A robustness verification system for mobile phone authentication based on gestures using Linear Discriminant Analysis

This article evaluates an authentication technique for mobiles based on gestures. Users create a remindful identifying gesture to be considered as their in-air signature. This work analyzes a database of 120 gestures of different vulnerability, obtaining an Equal Error Rate (EER) of 9.19% when robustness of gestures is not verified. Most of the errors in this EER come from very simple and easily forgeable gestures that should be discarded at enrollment phase. Therefore, an in-air signature robustness verification system using Linear Discriminant Analysis is proposed to infer automatically whether the gesture is secure or not. Different configurations have been tested obtaining a lowest EER of 4.01% when 45.02% of gestures were discarded, and an optimal compromise of EER of 4.82% when 19.19% of gestures were automatically rejected

Hand Image Segmentation by means of Gaussian Multiscale Aggregation for biometric applications

Applying biometrics to daily scenarios involves demanding requirements in terms of software and hardware. On the contrary, current biometric techniques are also being adapted to present-day devices, like mobile phones, laptops and the like, which are far from meeting the previous stated requirements. In fact, achieving a combination of both necessities is one of the most difficult problems at present in biometrics. Therefore, this paper presents a segmentation algorithm able to provide suitable solutions in terms of precision for hand biometric recognition, considering a wide range of backgrounds like carpets, glass, grass, mud, pavement, plastic, tiles or wood. Results highlight that segmentation accuracy is carried out with high rates of precision (F-measure 88%)), presenting competitive time results when compared to state-of-the-art segmentation algorithms time performanc

El diseño de encuestas : Un análisis del caso de la Encuesta Nacional de Consumo de Sustancias Psicoactivas

El presente trabajo realiza un análisis del instrumento de recolección de información para la medición del consumo de sustancias psicoactivas (ENCOSP) realizado por la Secretaría de Programación para la Prevención de la Drogadicción y la Lucha contra el Narcotráfico (SEDRONAR). La propuesta central es realizar un análisis exhaustivo de las debilidades y fortalezas del instrumento de recolección a la luz de las temáticas y debates centrales del diseño de encuestas. Para lograrlo se utilizaron como insumos primarios los formularios utilizados en el trabajo de campo, los manuales de capacitación a encuestadores y supervisores, y unas entrevistas a encuestadores que tuvieron a su cargo parte del trabajo de campo en la ciudad de La Plata. La analizada Encuesta Nacional de Consumo de Sustancias Psicoactivas (ENCOSP) es una replica de la anteriormente realizada por la Secretaría de Programación para la Prevención de la Drogadicción y la Lucha contra el Narcotráfico en el año 1999 con el fin de comparar ambas investigaciones en términos de prevalencia e incidencia.Mesa 22 - Ensayo sobre la metodología de las Ciencias Sociales.Departamento de Sociologí

Creación de comercializadora de productos de aseo Bioeco Health S.A.S

EmprendimientoDespués de tomar la decisión de crear la empresa PRODUCTOS DE ASEO BIOECO HEALTH S.A.S. con alto potencial de éxito, iniciando operaciones en la ciudad de Bogotá en las localidades de Usaquen, suba y Engativa, con el fin de fortalecer la venta de productos de aseo los cuales se plantea en este documento como un proyecto de emprendimiento que buscó por medio de estudios la factibilidad del negocio.INTRODUCCION 1. GENERALIDADES 2. ESTUDIO DE MERCADOS 3. ESTUDIO LEGAL 4. ESTUDIO TECNICO 5. ESTUDIO ORGANIZACIONAL 6. PLAN DE MERCADEO 7. ESTUDIO FINANCIERO 8. RESULTADOS DEL ESTUDIO DE MERCADOS 9. CONCLUSIONES 10. RECOMENDACIONES BIBLIOGRAFÍAPregradoIngeniero Industria

Orígenes, desarrollo y concepción de la Observación Participante en sociología

En la reciente institucionalización académica de la Metodología como disciplina reconocida y practicada en contextos institucionales, el estudio de los instrumentos conceptuales y operativos usados en la investigación empírica de las ciencias sociales ha venido ganando espacios. En tales marcos, la línea de Investigación encarada se propone aportar al campo de la metodología un conocimiento acerca de los orígenes y la sistematización de la técnica de la observación participante en Sociología. Para ello se propone avanzar sobre el reconocimiento y caracterización de las prácticas de investigación científica (fieldwork) que resultaron antecedentes de la observación participante a la luz de las principales corrientes filosóficas que fueron utilizadas como base ontológica y epistemológica para el uso de esta técnica y de las concepciones actuales sobre la técnica.Apellido, Nombre del Director/a/e: Piovani, Juan Ignacio Tipo de Beca: Formación Superior Año: 2007 Área Temática: SocialesFacultad de Humanidades y Ciencias de la Educació

Efectos del Aislamiento, Social, Preventivo y Obligatorio (ASPO) por Covid19 en la infancia

The effects caused by COVID in daily life require particular attention in childhood due to the dependence on adults to access resources and experiences that favor wellbeing, and because the less autonomy and possibilities they have to provide themselves with an environment that is appropriate for their needs and potentialities. Hence, the project addresses the effects of social, preventive and compulsory isolation (ASPO, Spanish acronym) on feeding, psychosocial and emotional development, school learning, recreational activities, peer socialization, affection and parental ties. The research focuses on how care (taking care of oneself, being cared and caring for others during the pandemic) is pursued and perceived both by adults and children and adolescents themselves, specially concerning about those living in contexts of vulnerability. In summary, the general aim is to know and size the incidence of ASPO in daily activities and relationships and to account and size the effects of isolation on children and adolescents, its impact on daily activities and relationships and identify the household strategies to nurse them and the social programs and community networks involved in child care. The research is based on a sequential mixed methods design with three moments or steps. The first step implies a qualitative approach focused on individual and group semi-structured interviews carried out by phone or video call. The sample was intentional and involved community, health and education key people. The second step consisted on a quantitative approach over a representative sample of public and private schools, including kindergarten, primary and secondary schools. It involved a phone and online poll through a semi-structured questionnaire to households with children and adolescent (from 3 to 17 years old) of La Plata, Berisso and Ensenada. The third step aimed at identifying children and adolescents´ experiences through ad hoc devices focused on written and artistic outputs. The results of the investigation show the incidence of ASPO on children and adolescents in a comprehensive way, identifying the inequalities that the effects express in different dimensions of daily life, how the care are addressed and how the modes of coping are rehearsed.Los efectos provocados por el COVID en la vida cotidiana requieren particular atención en la infancia por la dependencia de los adultos para acceder a recursos y experiencias que favorezcan el bienestar y la menor autonomía y posibilidades que poseen para proveerse de un entorno apropiado a sus necesidades y potencialidades. Para ello, el proyecto aborda los efectos del aislamiento social, preventivo y obligatorio (ASPO) en la alimentación, en el desarrollo psicosocial y socioemocional, en los aprendizajes escolares, en las actividades recreativas, en la socialización con pares, en los afectos y en los vínculos parentales. El interés se centra en cómo se llevan a cabo y perciben los cuidados (cuidarse, ser cuidado y cuidar en el marco de la pandemia) tanto por parte de los adultos como desde la propia experiencia y perspectiva de niños, niñas y adolescentes, teniendo especial preocupación en quienes viven en contextos de vulnerabilidad. En síntesis, el objetivo general es conocer y dimensionar la incidencia del ASPO en las actividades y relaciones cotidianas y dar conocer -y dimensionar- los efectos del aislamiento en niños, niñas y adolescentes, su incidencia en las actividades y relaciones cotidianas y dar cuenta de las estrategias implementadas por los hogares para atenderlos y la presencia de programas sociales y redes comunitarias en el cuidado infantil. Los resultados del estudio permiten recuperar de manera integral, los efectos del ASPO en la población de niños niñas y adolescentes, identificando la desigualdad que ellos expresan en distintas dimensiones de la vida cotidiana, cómo se tramitan los cuidados y se manifiestan modalidades de afrontamiento