Ear Biometrics: A Small Look at the Process of Ear Recognition

This document provides an approach to biometrics analysis which consists in the location and identification of ears in real time. Ear features, which is a stable biometric approach that does not vary with age, have been used for many years in the forensic science of recognition. The ear has all the properties that a biometric trait should have, i.e. uniqueness, permanence, universality and collectability. Because it is a field of study with potential growth, in this paper, we summarize some of the approaches to the detection and recognition in existing 2D images in order to provide a perspective on the possible future research and the develop of a practical application of some of these methodologies to create finally a functional application for identification and recognition of individuals from an image of the ear, the above in the context of intelligent surveillance and criminal identification, one of the most important areas in the processes of identification

Face Identification by Real-Time Connectionist System

This document provides an approach to biometrics analysis which consists in the location and identification of faces in real time, making the concept a safe alternative to Web sites based on the paradigm of user and password. Numerous techniques are available to implement face recognition including the principal component analysis (PCA), neural networks, and geometric approach to the problem considering the shapes of the face representing a collection of values. The study and application of these processes originated the development of a security architecture supported by the comparison of images captured from a webcam using methodology of PCA, and the Hausdorff algorithm of distance as similarity measures between a general model of the registered user and the objects (faces) stored in the database, the result is a web authentication system with main emphasis on efficiency and application of neural networks

A Brief Review of the Ear Recognition Process using Deep Neural Networks

The process of precisely recognize people by ears has been getting major attention in recent years. It represents an important step in the biometric research, especially as a complement to face recognition systems which have difficult in real conditions. This is due to the great variation in shapes, variable lighting conditions, and the changing profile shape which is a planar representation of a complex object. An ear recognition system involving a convolutional neural networks (CNN) is proposed to identify a person given an input image. The proposed method matches the performance of other traditional approaches when analyzed against clean photographs. However, the F1 metric of the results shows improvements in specificity of the recognition. We also present a technique for improving the speed of a CNN applied to large input images through the optimization of the sliding window approac

A Small Look at the Ear Recognition Process using a Hybrid Approach

The purpose of this document is to offer a combined approach in biometric analysis field, integrating some of the most known techniques using ears to recognize people. This study uses Hausdorff distance as a pre-processing stage adding sturdiness to increase the performance filtering for the subjects to use it in the testing process. Also includes the Image Ray Transform (IRT) and the Haar based classifier for the detection step. Then, the system computes Speeded Up Robust Features (SURF) and Linear Discriminant Analysis (LDA) as an input of two neural networks to recognize a person by the patterns of its ear. To show the applied theory experimental results, the above algorithms have been implemented using Microsoft C#. The investigation results showed robustness improving the ear recognition process

Comprensión conceptual de electromagnetismo en el laboratorio mediante aprendizaje basado en problemas (ABP): Compreensão conceitual do eletromagnetismo no laboratório através do aprendizado baseado em problemas (PBL)

Los conceptos de electromagnetismo representan un reto para el aprendiz debido al grado de abstracción que tiene que desarrollar para entenderlos y aplicarlos, en este trabajo se muestra el resultado de un esfuerzo realizado durante el curso de laboratorio de electromagnetismo  para auxiliar al alumnado de pregrado en este proceso de abstracción y al mismo tiempo contribuir al desarrollo de habilidades blandas mediante el uso del Aprendizaje Basado en Proyectos (ABP) complementariamente con métodos tradicionales de enseñanza. Se compararon dos grupos uno donde se usó el método ABP y otro de control, al inicio y al final se aplica la misma evaluación conceptual de electricidad y magnetismo para observar si hubo diferencia en el grado de comprensión conceptual de la materia. Se utilizó el método de diferencia en diferencias para medir el impacto, los resultados no fueron alentadores, sin embargo, la mejoría de un 10% en el promedio motivaron a realizar un análisis de los resultados por temas; encontrando deficiencias en cálculo vectorial y en la aplicación conceptual de las leyes de Newton mostrando que la dificultad de abstracción conceptual por parte de los alumnos no solo es en electromagnetismo. Se observó cualitativamente que durante el proceso y la evaluación de los proyectos los alumnos mostraron habilidades blandas: trabajo en equipo, capacidad analítica y de discusión en resolución de problemas, trabajo interdisciplinario y gestión del trabajo

Reconocimiento NIIF: el capital intelectual en el contexto de las instituciones de educación superior

With the arrival of globalization new concepts emerged, one of them is intellectual capital, defined as an intangible asset that is responsible for adding value to the company through criteria such as research, innovation and development, through knowledge that are acquired in the activities of a company or association. On the other hand, being a source of intangibles, universities are considered as social enterprises, especially because they make up a set of information, services, goods, among others, in search of greater community benefits. For this reason, the scope of this research focuses on contributing to a process of recognition of intellectual capital under IFRS regulations within the higher education institutions of the city of Villavicencio.   For the purposes of this research, information collection instruments, characterization sheet, interviews and surveys applied to the analysis unit were incorporated, all with the purpose of achieving a harmonious development around the problem posed, mainly in search of integration. of accounting concepts with the development of intellectual capital in university training spaces.Con la llegada de la globalización surgieron nuevos conceptos, uno de ellos es el capital intelectual, definido como un activo intangible que se encarga de aportar valor a la empresa por medio de criterios como la investigación, la innovación y el desarrollo, a través de conocimientos que se van adquiriendo en las actividades propias de una compañía o asociación. De otra parte, siendo una fuente de intangibles, las universidades son consideradas como empresas sociales, especialmente porque conforman un conjunto de información, servicios, bienes, entre otros, en procura de mayores beneficios comunitarios. Por tal motivo, el alcance de esta investigación se centra en contribuir con un proceso de reconocimiento del capital intelectual bajo la normativa NIIF dentro de las instituciones de educación superior de la ciudad de Villavicencio.   Para efectos de esta investigación, se incorporaron instrumentos de recolección de información, ficha de caracterización, entrevistas y encuestas aplicadas a la unidad de análisis, todo esto con la finalidad de lograr un desarrollo armónico en torno al problema planteado, principalmente en procura de la integración de conceptos contables con el desarrollo del capital intelectual en los espacios de formación universitaria

Oxidative Stress and Parkinson’s Disease: Effects on Environmental Toxicology

Epidemiological studies have found an increased risk of Parkinson’s disease (PD) with environmental factors such as exposure to substances derived from industrial processes, use of agrochemicals, or living in a rural environment. The hypothesis that certain environmental toxins could be the source of the EP is supported by the discovery that chemicals such as herbicides paraquat, diquat, and the fungicide maneb are selectively toxic in nigrostriatal dopaminergic neurons. Also, one of the insecticides produced by plants, such as rotenone, and by-product of the synthesis of synthetic heroin MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) can be reproduced in animal models where neurochemicals, histopathological, and clinical characteristic of PD can be found. Interestingly, there are similarities in the chemical structure of paraquat and MPTP. Recent evidence exhibited that inflammation and oxidative stress play an essential role in the development of PD. So, in our laboratory we found that in an animal model melatonin decreases the products of lipid oxidation, nitric oxide metabolites, and the activity of cyclooxygenase 2, which are induced by an intraperitoneal injection of MPTP. This suggests that the neuroprotective effects of melatonin are partially attributed to its antioxidant scavenging and anti-inflammatory action

Investigation of the fusion process for B 10 + Au 197 at near-barrier energies

In a previous work, we presented data for the B10+Au197 system, corresponding to quasielastic and elastic scattering, Au197 inelastic excitation, and one neutron pickup transfer, measuring the angular distribution of scattered beam-like ejectiles at several energies around the Coulomb barrier. In this paper, we present data for the fusion process of the same system, at several energies around the Coulomb barrier, as well as new data for one neutron pickup and stripping transfer. In this case, we detected offline γ rays stemming from the β-delayed decay chain of fusion-evaporation residues and heavy transfer products. As in our previous work, we analyzed this data set with coupled reaction channels calculations using the São Paulo potential. We show that the coupling to the one neutron transfer channel is quite important to describe the fusion data at the sub-barrier energy region. We also provide a comparison of the experimental fusion cross sections obtained for B10+Au197 with data for several other systems involving the same target nucleus.Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina) PIP00786COFondo para la Investigacin Cientfica y Tecnolgica (FONCYT, Argentina) PICT-2017-4088Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, Brazil) 2018/09998-8, 2019/07767-1, 2019/05769-7Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brazil) 302160/2018-3, 304056/2019-7Ministerio de Ciencia, Innovación y Universidades PGC2018-096994-B-C2