Cristian Vidal Silva

Satisfacción de los Adultos Mayores por el Uso de Audífonos otorgados por el Programa Chileno de Garantías Explícitas en Salud (GES)

This paper describes a study about the user satisfaction of senior people in Chile for the use of earphones given by the Chilean Program Explicit Health Guaranties (GES). For this reason, the requirements established for the use of earphones in a representative sample of older people in Chile (target population) are analyzed and the benefits achieved by the use of earphones in the target population are discussed. In addition, this paper presents an analysis of factors of the main components of life quality perception by the use of earphones in senior people. It is concluded that there is direct relation between the use of earphones and quality life of senior people that used them.

A DSP Practical Application: Working on ECG Signal

An electrocardiogram (ECG) is a graphical record of bioelectrical signal generated by the human body during cardiac cycle (Goldschlager, 1989). ECG graphically gives useful information that relates to the heart functioning (Dubis, 1976) by means of a base line and waves representing the heart voltage changes during a period of time, usually a short period (Cuesta, 2001). Putting leads on specific part of the human body, it is possible to get changes of the bioelectrical heart signal (Goldschlager, 1989) where one of the most basic forms of organizing them is known as Einthoven lead system which is shown in Figure 1 (Vidal & Pavesi, 2004; Vidal et al., 2008).

Formalización de un modelo de trabajo con empresas en una carrera de ingeniería

espanolLa carrera de Ingenieria en Informatica Empresarial de la Universidad de Talca, inicia sus actividades en el ano 2005, siendo acreditada por 5 anos el ano 2012. Entre sus fortalezas destaca su vinculacion con el sector productivo a partir del desarrollo de proyectos en empresas por parte de los alumnos. Sin embargo, la informalidad con que se ha implementado esta interaccion, ha dificultado la gestion global de los proyectos por la diversidad de alcances, grados de complejidad de los proyectos y calidad de sus productos, lo que puede afectar la relacion cultivada con las empresas y que es el sello distintivo de la carrera. Actualmente, la carrera tiene 225 alumnos, quienes ejecutan mas de 100 proyectos anuales realizados en mas de 60 empresas, tanto pequenas como grandes. Para resolver el problema expuesto, se ha planteado formalizar un modelo de trabajo que permita establecer y controlar la apertura, cierre, y unificar criterios en torno al alcance y complejidad de los proyectos, y de la calidad de los productos y plazos esperados en beneficio de los distintos actores (empresas, alumnos y profesores). Como resultado se tiene un modelo de trabajo con empresas basado en las actividades que producen los cambios de estado en los proyectos y que se expresa en diagramas de maquina de estados, de proveedores-entradas-procesos-salidas-consumidores (SIPOC), y de procesos. Con la implementacion del modelo se aspira dar sustentabilidad a una forma de trabajar con las empresas que ha sido apreciada por alumnos, egresados y empleadores por facilitar una temprana insercion laboral. EnglishThe program of Business Informatics Engineering in the Universidad de Talca, started its activities in 2005 and was accredited in 2012 for a period of 5 years. Among its strengths is the link with the production sector established by the development ofprojects in the businesses by the students. However, the informality with which it has implemented this interaction has hampered the overall management of the projects due to the diversity of the scopes, the degree of complexity of the projects, and the quality of the products that can affect the cultivated relationship with the businesses that is unique trademark of the program. Currently, the program has 225 students who annually conduct more than 100 projects in about 60 companies including both small and large companies. To solve this highlighted problem, it has been proposed to formalize a working model to establish and control the opening, closing, and unifying criteria of the scope and complexity of the projects, and of the quality of the products and the expected benefitfor the stakeholders (businesses, students, and professors). As the result, we have a model of working with businesses based on the activities that produce changes in the status of the projects, expressed in the diagrams of the finite-state machine, of the tool SIPOC (suppliers, inputs, process, outputs, and customers), and of the processes. With the implementation of the model, we aim to achieve sustainabilityfor the opportunity of working with businesses that have been appreciated by students, alumni, and employers to facilitate early employment.

JPI feature models - Exploring a JPI and FOP symbiosis for software modeling

Looking for a complete modular software development paradigm, this article presents Join Point Interface JPI Feature Models, in the context of a JPI and Feature-Oriented Programming FOP symbiosis paradigm. Therefore, this article describes pros and cons of JPI and FOP approaches for the modular software and software product line production, respective; and highlights the benefits of this mixing proposal; in particular, the JPI Feature Model benefits for a high-level software product line modeling. As an application example, this article applies JPI Features Models on a classic FOP example already modeled using a previous aspect-oriented feature model proposal. Main goals of this application are to visualize traditional feature models preserved components such alternative and optional feature sets and optional and mandatory features as well as special features associations (cross-tree constraints), and differences and advantages with respect to previous research works about extending feature model to support aspect-oriented modeling principles.

JPI UML Software Modeling

Aspect-Oriented Programming AOP extends object-oriented programming OOP with aspects to modularize crosscutting behavior on classes by means of aspects to advise base code in the occurrence of join points according to pointcut rules definition. However, join points introduce dependencies between aspects and base code, a great issue to achieve an effective independent development of software modules. Join Point Interfaces JPI represent join points using interfaces between classes and aspect, thus these modules do not depend of each other. Nevertheless, since like AOP, JPI is a programming methodology; thus, for a complete aspect-oriented software development process, it is necessary to define JPI requirements and JPI modeling phases. Towards previous goal, this article proposes JPI UML class and sequence diagrams for modeling JPI software solutions. A purpose of these diagrams is to facilitate understanding the structure and behavior of JPI programs. As an application example, this article applies the JPI UML diagrams proposal on a case study and analyzes the associated JPI code to prove their hegemony.

JPI UML: UML Class and Sequence Diagrams Proposal for Aspect-Oriented JPI Applications

Join Point Interfaces (JPI) represent a currentAspect-Oriented Programming (AOP) methodology for solving modularization issues in classic AOP. Nevertheless, as it is for classic AOP, phases of requirement elicitation and software design are needed for the JPI software development process. In order to advance towards the solution of these issues, this article proposes and applies to a case study JPI UML class diagrams and sequence diagrams. After applying JPI UML diagrams and analyzing the code of a modeled program, our article displays theconsistency between models and the program code derived by means of our methodological approach.