The Progress of Tastein Mid-Nineteenth Century England: Art in Wilkie Collins' Early Writing

This dissertation shows the extent to which Wilkie Collins reflected the changing mid-Victorian perceptions on aesthetic discrimination in his early body of work. A producer of literary commodities for a middle-class public, Collins had an acute understanding of the pivotal changes brought by capitalist development in what concerned the acquisition of taste: once a matter restricted to a selected few and now, as his career in the field of letters progressed, a right demanded by many. Following a close reading of his literary production, essays and correspondence during the 1850s, Collins emerges as an author thoroughly aware of the democratisation of taste that pervaded a crucial decade of the nineteenth century

Responsabilidad penal de personas jurídicas en el conflicto armado en Colombia. Estudio de caso: la Chiquita Brands

Artículo de estudio de casoEl estudio de la Responsabilidad Penal predicable de las personas jurídicas es un debate que apenas comienza a ver luz en el escenario académico y judicial en Colombia. En ese sentido, se hace necesario hacer un estudio sobre qué posibilidades existen alrededor de la adjudicación de responsabilidad penal a una corporación, así como de su posterior sanción. Para lo anterior, se hará un estudio sobre el tratamiento actual de la responsabilidad penal predicable a compañías, con el fin de determinar los problemas que trae consigo frente a la doctrina actual de “societas delinquere non potest”. Para lo anterior se examinará desde la literatura académica el avance en otras latitudes de la atribución de responsabilidad y sanciones a personas jurídicas. Las conclusiones del presente trabajo permitirán afirmar que es posible crear un régimen jurídico que permita perseguir las prácticas empresariales que tiendan al menoscabo de las garantías en Derechos Humanos y Derecho Internacional Humanitario, donde a su vez se busque la reparación integral de las víctimas.37 p.Introducción 1. Responsabilidad Penal -“Societas Delinquere Non Potest”; 2. Responsabilidad Penal A Personas Jurídicas – Posibilidades Jurídicas; 3. Aplicación de Sanciones En Procesos De Justicia Transicional; 4. Alianzas Trasnacionales-Grupos Paramilitares. Caso de la Empresa Chiquita Brands 5. Consecuencias En El Post-Conflicto Farc – Estado Colombiano Conclusiones ReferenciasPregradoAbogad

Incorporating signature verification on handheld devices with user-dependent Hidden Markov Models

Proceedings of the International Conference on Frontiers in Hadwriting Recognition (ICFHR 2008)A dynamic signature verification system based on Hidden Markov Models is presented. For each user model, the number of states and Gaussian mixtures of the Hidden Markov Model is automatically set in order to optimize the verification performance. By introducing this userdependent structure in the statistical modeling of signatures, the system error rate is significantly decreased in the challenging scenario of dynamic signature verification on handheld devices. Experimental results are given on a subset of the recently acquired BIOSECURE multimodal database, using signatures captured with a PDAThis work has been supported by the Spanish Ministry of Education under project TEC2006-13141-C03-03

Graphical Password-Based User Authentication with Free-Form Doodles

Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. M. Martinez-Diaz, J. Fierrez and J. Galbally, "Graphical Password-Based User Authentication With Free-Form Doodles," in IEEE Transactions on Human-Machine Systems, vol. 46, no. 4, pp. 607-614, Aug. 2016. doi: 10.1109/THMS.2015.2504101User authentication using simple gestures is now common in portable devices. In this work, authentication with free-form sketches is studied. Verification systems using dynamic time warping and Gaussian mixture models are proposed, based on dynamic signature verification approaches. The most discriminant features are studied using the sequential forward floating selection algorithm. The effects of the time lapse between capture sessions and the impact of the training set size are also studied. Development and validation experiments are performed using the DooDB database, which contains passwords from 100 users captured on a smartphone touchscreen. Equal error rates between 3% and 8% are obtained against random forgeries and between 21% and 22% against skilled forgeries. High variability between capture sessions increases the error rates.This work was supported by projects Contexts (S2009/TIC-1485) from CAM, Bio-Shield (TEC2012-34881) from Spanish MINECO, and BEAT (FP7-SEC-284989) from EU

Synthetic generation of handwritten signatures based on spectral analysis

Javier Galbally ; Julian Fierrez ; Marcos Martinez-Diaz ; Javier Ortega-Garcia; "Synthetic generation of handwritten signatures based on spectral analysis", Optics and Photonics in Global Homeland Security V and Biometric Technology for Human Identification VI, Proc. SPIE 7306 (May 05, 2009); doi:10.1117/12.817928. Copyright 2009 Society of Photo‑Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.Proceedings of the V Optics and Photonics in Global Homeland Security; and VI Biometric Technology for Human Identification (Orlando, Florida, United States)A new method to generate synthetic online signatures is presented. The algorithm uses a parametrical model to generate the synthetic Discrete Fourier Transform (DFT) of the trajectory signals, which are then refined in the time domain and completed with a synthetic pressure function. Multiple samples of each signature are created so that synthetic databases may be produced. Quantitative and qualitative results are reported, showing that, in addition to presenting a very realistic appearance, the synthetically generated signatures have very similar characteristics to those that enable the recognition of real signatures.This work was supported by Spanish MEC under project TEC2006-13141-C03-03

Guided participation in youth media practices

Youth has to deal with some digital practices and develop media discourses on their own. Our study aims to deepen these concepts from the point of view of the guided participation, understood in this case as a collaborative process of media literacy based on culturally significant activities. Our data comes from a series of workshops that took place at the Telefonica Flagship Store (Madrid, Spain) with teens between eight and 14 years old. The evidence was collected by qualitative research techniques such as observation, conversation and descriptive analysis. The results give us some preliminary ideas for discussion: 1) social media practices enable youth to connect their online and offline activities with their interests; 2) the generation of collaborative learning scenarios based on the interaction between young people becomes a fundamental element of media literacy and 3) user-generated content emerges as an identity and habits depiction in media, especially among young people.Os jovens têm de lidar com algumas práticas digitais e desenvolver discursos mediáticos por conta própria. O objetivo do nosso estudo é aprofundar estes conceitos do ponto de vista da participação guiada, compreendida, neste caso, como um processo colaborativo de literacia mediática baseado em atividades culturalmente significativas. Os nossos dados provêm de uma série de workshops realizados na Telefonica Flagship Store (Madrid, Espanha) com adolescentes entre os oito e os 14 anos de idade. As observações foram recolhidas através de técnicas de pesquisa qualitativa, como a observação, conversação e análise descritiva. Os resultados fornecem-nos algumas ideias preliminares para discussão: 1) as práticas nas redes sociais permitem que os jovens liguem as suas atividades online e offline aos seus interesses; 2) a geração de cenários de aprendizagem colaborativa baseados na interação entre jovens torna-se um elemento fundamental da literacia mediática; e 3) o conteúdo gerado pelo utilizador surge como uma identidade e representação de hábitos nos media, especialmente entre os jovens

Hill-climbing and brute-force attacks on biometric systems: A case study in match-on-card fingerprint verification

Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. M. Martínez-Díaz, J. Fiérrez-Aguilar, F. Alonso-Fernández, J. Ortega-García, J.A. Siguenza, "Hill-Climbing and Brute-Force Attacks on Biometric Systems: A Case Study in Match-on-Card Fingerprint Verification" in Proceedings of 40th Annual IEEE International Carnahan Conferences Security Technology ICCST, Lexington, KY (USA), 2006, 151 - 159In this paper, we study the robustness of state-of-the-art automatic fingerprint verification systems against hill climbing and brute-force attacks. We compare the performance of this type of attacks against two different minutiae-based systems, the NIST Fingerprint Image Software 2 (NFIS2) reference system and a Match-on-Card based system. In order to study their success rate, the attacks are analyzed and modified in each scenario. We focus on the influence of initial conditions in hill-climbing attacks, like the number of minutiae in the synthetically generated templates or the performance of each type of modification in the template. We demonstrate how slight modifications in the hill-climbing algorithm lead to very different success ratesThis work has been supported by the Spanish Ministry of Defense, BioSecure NoE and the TIC2003-08382-C05-01 project of the Spanish Ministry of Science and Technolog

Plataforma Web para la Adiminitración del Sistema de Recargas del Servicio Prepago en la Empresa de Acueducto y Alcantarillado de Villavicencio.

33 hojasEsta plataforma desarrollada como modalidad de pasantía, por estudiantes de la universidad de los llanos, hecha a la medida de la Empresa de Acueducto y Alcantarillado de Villavicencio (EAAV), es una de las primeras de su tipo en la región de Villavicencio, fue desarrollada durante cuatro meses en el Framework Django y con interfaces graficas de cómoda usabilidad utilizando html5, JavaScript, Ajax; con esta plataforma la Empresa de Acueducto y Alcantarillado de Villavicencio, implementa un nuevo modo de dar el servicio de agua y acueducto a la ciudad, también incluyendo una nueva política económica en la cual cada recarga hecha asigna un porcentaje a la deuda que este usuario tenga con la empresa, de esta manera reducir la deuda o cartera que poseen algunos usuarios con la entidad. También participa de manera activa con el medio ambiente creando con el nuevo modo de pago y la utilidad de ver el consumo personal una ciencia más responsable por el uso del recurso hídrico.PregradoIngeniería de Sistema

Modelado CFD de la combustión en calderas de biomasa – Revisión del estado del arte

Combustion is the main method of converting biomass to energy, either by direct heating systems or by boilers. By means of CFD models, it is possible to optimize the behavior of those systems and improve significantly its performance, without incurring the economic and environmental cost of experimental studies. However, modelling of biomass combustion is a complex process that requires a large number of sub-models and computational resources for a detailed description, therefore, different approaches have been developed which depend on the system and simulation objective. In this work, a review of the state of art of modelling of solid biomass combustion in the last years is presented, including classification, description and analysis of several of the main models about the subject.La combustión es el principal método de transformación de biomasa en energía, ya sea en sistemas de calefacción directa o en calderas. Por medio de los modelos CFD se puede optimizar el funcionamiento de estos sistemas y lograr mejoras significativas en su desempeño, sin incurrir en los costos económicos y ambientales que los estudios experimentales acarrean. No obstante, el modelado de la combustión de biomasa sólida es un proceso complejo que requiere de gran cantidad de sub-modelos y recursos computacionales para una descripción detallada, por lo que se han desarrollado diversos enfoques que dependen del sistema a modelar y del objetivo de la simulación. En el presente trabajo se realiza una revisión del estado del arte sobre el modelado de la combustión de biomasa sólida en los últimos años, incluyendo la clasificación, descripción y análisis de varios de los principales modelos desarrollados sobre el tema