Los Varela, Argentina

National University of La Matanza

Los Varela, Argentina

The National University of La Matanza is an Argentine national university situated in La Matanza Partido, Buenos Aires Province. Wikipedia.

Time filter
Source Type

Aubin V.,National University of La Matanza | Aubin V.,Complutense University of Madrid | Mora M.,Catholic University of the Maule
Expert Systems with Applications | Year: 2017

A new descriptor for the verification of people's identity through the analysis of handwritten text is presented. The proposed descriptor corresponds to a representation of the pattern of writing pressure computed from the grayscale image of a handwritten stroke. Specifically, the descriptor corresponds to the relative position of the minimum gray value points within the stroke. A repository of images for 50 people was created. Each person wrote 50 samples of 6 different symbols which resulted in a total of 15,000 images to carry out the experiments. For each individual's identity verification, a supervised classifier for non-linearly separable data of the Support Vector Machine type was used, which resulted in the training of a total of 50 classifiers. 50 groups of balanced data were created through the sub-sampling of the majority class for the proper training of the classifiers. Furthermore, K-Fold Cross Validation was used to assess objectively the descriptor performance. The results of the assessment are positive: a hit rate average higher than 95% was achieved for the six analyzed symbols to verify identity. The overall proposal of the paper is interesting because it presents a method based on the processing of very simple characters (the characters are notoriously simpler than a signature). The proposed descriptor has the advantage of being invariant to rotation, which makes the process robust to involuntary changes in the inclination of the sheet containing the strokes. Besides, the descriptor is invariant to scale, as it considers the obtained sign length resizing. This makes the process robust to characters written with different sizes. © 2017 Elsevier Ltd

Hernandez H.,National University of La Matanza | Macias G.,National University of La Matanza
Revista Panamericana de Salud Publica/Pan American Journal of Public Health | Year: 2017

Objectives: To describe the time trend of mortality attributable to diabetes mellitus (DM) in Argentina in the years 1990-2013, by age and sex. Methods: Crude, age-specific, and age-adjusted rates of DM mortality in Argentina were calculated for the period 1990-2013. Mortality data were obtained from the Statistical Report on Deaths issued by the Department of Statistics and Health Information. An analysis of this trend was carried out through joinpoint regression models. Results: Analysis of the trend of crude and age-adjusted DM mortality rates yielded a statistically significant model in which mortality increased between 1990 and 2001 and declined thereafter. Furthermore, for age-adjusted rates, there was a significant downward trend of mortality in women (AAPC -1.10, 95%CI -1.70 to -0.50). Age-specific mortality rates multiplied with every 10-year increment in age. All age groups older than 50 years showed a growing mortality trend between 1990 and 2001. Conclusions: DM mortality mainly affects people over the age of 50 and men. A significant downward trend in age-adjusted DM mortality rates was observed for women. These findings highlight the importance of developing policies for prevention and early detection, as well as of proper coding of multiple causes of death.

Aubin V.,National University of La Matanza | Mora M.,Catholic University of the Maule
Proceedings - International Conference of the Chilean Computer Science Society, SCCC | Year: 2017

This paper presents preliminary results of the study of a new descriptor for identity verification based on handwriting strokes. The descriptor is obtained from the relationship between the line that joins the darkest points of the image and the line of the skeleton of the stroke. It was discovered that the relative distance between the line of the minimum gray level values in relation to the skeleton is not only characteristic of the author but it also varies from one person to another. The promising results of this study lead to the belief that it is feasible to develop a method of identity verification based on the descriptor presented. © 2015 IEEE.

Penchaszadeh V.B.,National University of La Matanza | Schuler-Faccini L.,Instituto Nacional Of Ciencia E Tecnologia Em Genetica Medica Populacional | Schuler-Faccini L.,Federal University of Rio Grande do Sul
Genetics and Molecular Biology | Year: 2014

Over the past three decades, there has been an accelerated development of genetic technology, leading to its use in human genetic identification for many purposes. Additionally, it has been made explicit that identity is a fundamental human right. A number of historical circumstances have connected these developments. Personal identity is increasingly associated with the preservation and defense of human rights and is a tool to repair the violation of these rights, particularly the right to identity. In this article, we report the use of genetics to support the right to identity in two historical circumstances. First, we report the search, localization, DNA testing and genetic identification of 110 individuals who were appropriated as babies by the Argentine military dictatorship of 1976-1983 in the context of savage repression and egregious violations of human rights, including forced disappearance and suppression of identity. Second, we report on the repair of right-to-identity violations of hundreds of individuals that occurred during the process of compulsory isolation of patients with leprosy in Brazil through the Program "Reencontro", which has led to the genetic identification of 158 pairs of individuals who previously did not have proof that they were siblings. The high value placed on genetic identification by victims of identity suppression did not counter the prevailing view that genetic factors were not more important than other factors (social, emotional, educational, cultural, spiritual) in determining the complex phenomenon of personal identity. The use of genetic identification as a tool to redress and repair human rights violations is a novel application of human genetics for the benefit of mankind. © 2014, Sociedade Brasileira de Genética.

Penchaszadeh V.B.,National University of La Matanza
Journal of Community Genetics | Year: 2015

This paper reviews the health situation and developments in medical genetics and bioethics in Latin America, with a focus on Argentina. The region is the most inequitable in the world, with an average Gini Index of 52.5 and 25 % of the population living in poverty. Health expenditures are low and health systems are fragmented and privatised, with curtailed governmental responsibility and regulation. Health-care decision making is mostly in the hands of private insurance corporations and the medical-industrial complex, so that what is (or is not) covered by health plans is arbitrary and determined by the market and not by population health needs. This inequity and the lack of meaningful governmental intervention in the provision of health care, including genetic services, are at the heart of the bioethical dilemmas in Latin America. It is not surprising, therefore, that bioethics in the region has developed an approach grounded in social justice, equity and human rights as guiding principles, in contrast to the individualism espoused by Anglo-Saxon bioethics. The main ethical issues identified in genetics in Latin America are (1) inequity in access to genetic services, particularly in prenatal diagnosis, (2) genetic discrimination and (3) the lack of adherence to internationally accepted requisites of clinical validity and utility for diagnostic and predictive genetic testing. In this context, there is a risk that the impressive advances in genetics/genomics occurring in developed countries may fail to improve the public’s health and deepen inequity, with the implementation of expensive genetic technologies of unproven validity. © 2015, Springer-Verlag Berlin Heidelberg.

Penchaszadeh V.B.,National University of La Matanza
Journal of Community Genetics | Year: 2015

Human genetic identification has been increasingly associated with the preservation, defence and reparation of human rights, in particular the right to genetic identity. The Argentinian military dictatorship of 1976–1983 engaged in a savage repression and egregious violations of human rights, including forced disappearance, torture, assassination and appropriation of children of the disappeared with suppression of their identity. The ethical, legal and social nuances in the use of forensic genetics to support the right to identity in Argentina included issues such as the best interest of children being raised by criminals, the right to learn the truth of one’s origin and identity, rights of their biological families, the issue of voluntary versus compulsory testing of victims, as well as the duty of the state to investigate crimes against humanity, punish perpetrators and provide justice and reparation to the victims. In the 30 years following the return to democracy in 1984, the search, localization and DNA testing of disappeared children and young adults has led, so far, to the genetic identification of 116 persons who had been abducted as babies. The high value placed on DNA testing to identify victims of identity suppression did not conflict with the social consensus that personal identity is a complex and dynamic concept, attained by the interaction of genetics with historical, social, emotional, educational, cultural and other important environmental factors. The use of genetic identification as a tool to redress and repair human rights violations is a novel application of human genetics within a developing set of ethical and political circumstances. © 2015, Springer-Verlag Berlin Heidelberg.

Tinetti F.G.,National University of La Plata | Martin S.M.,National University of La Matanza
Proceedings of the IASTED International Conference on Parallel and Distributed Computing and Systems | Year: 2012

The particle-particle method for N-Body problems is one of the most commonly used methods in computer driven physics simulation. These algorithms are, in general, very simple to design and code, and highly parallelizable. In this article, we present the most important approaches for the application of the three performance improvement areas on these algorithms when executed on high performance computing (HPC) clusters: 1) sequential optimization (a single core in a node of the cluster), 2) shared memory parallelism (in a single node with multiple CPUs available, just like a multiprocessor), and 3) distributed memory parallelism (in the whole cluster). For each one of the improvement areas we present the employed techniques and the obtained performance gain. Also, we will show how some (sequential/classical) code optimizations are almost essential for obtaining at least acceptable parallel performance and scalability.

Turull-Torres J.M.,National University of La Matanza | Turull-Torres J.M.,Massey University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

Relational machines (RM) were introduced as abstract machines that compute queries to relational database instances (dbi’s), that are generic (i.e., that preserve isomorphisms). As RM’s cannot discern between tuples that are equivalent in first order logic with k variables, Relational Complexity was introduced as a complexity theory where the input dbi to a query is measured as its sizek, i.e., as the number of classes in the equivalence relation of equality of FOk types of k-tuples in the dbi. We describe the basic notions of Relational Complexity, and survey known characterizations of some of its main classes through different fixed point logics and through fragments of second and third order logics. © Springer International Publishing Switzerland 2016.

Vera P.M.,National University of La Matanza
International Journal of Information Technologies and Systems Approach | Year: 2015

Current MDD methodologies are complex to use and require doing lots of models and configurations. Usually after all that effort only some part of the application source code can be automatically created. It would be desirable to have a more simple technique, but powerful enough for automatically creating a fully functional application. This works introduces a component based model driven development approach where a set of user interface components will be configured to define system behavior. Component configuration will be direct, simple and supported by a modeling tool which also includes automatic transformations for reducing the modeling task. The methodology requires the designer to build only two models: a class diagram, representing the data model of the application and a component diagram defining the user interface and the system navigation. Both components are based on UML extended with stereotypes and tagged values allowing configuring the system behavior. Copyright © 2015, IGI Global.

Penchaszadeh V.B.,National University of La Matanza
Journal of Community Genetics | Year: 2013

Argentina is a middle-income country with a population of 40 million people. The structure of morbidity and mortality approaches that of more developed nations, with congenital and genetic disorders contributing significantly to ill health. The health delivery system is mixed, with public, social security, and private sectors which together spend close to 10 % of the GNP. Health subsectors are decentralized at provincial and municipality levels, where health planning and financing occurs, leading to fragmentation, inefficiency, and inequities. There are about 41 clinical genetic units in major medical centers in large cities, staffed by about 120 clinical geneticists, although only a few units are fully comprehensive genetic centers. Duplications, deficiencies, and poor regionalization and coordination affect health care delivery in general and in genetics. Funding for genetic services is limited due to poor understanding and lack of political will on the part of health authorities. Recently, however, there have been some interesting initiatives by national and provincial ministries of health to improve genetic services delivery by increasing coordination and regionalization. At the same time, training in genetics of health professionals is occurring, particularly in primary health care, and registries of congenital defects are being put in place. These developments are occurring in conjunction with a new awareness by health authorities of the importance of genetics in health care and research, a heightened activism of patient organizations demanding services for neglected conditions, as well as of women movements for the right to safe abortion. © Springer-Verlag 2012.

Loading National University of La Matanza collaborators
Loading National University of La Matanza collaborators