Diferenciación por calidad de bienes con base primaria y de baja tecnología: ¿una ventana de oportunidades para América Latina?

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La estratificación social bajo tensión en la era de la globalización

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Precios relativos en América Latina en períodos de baja inflación y cambios estructurales

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La paradoja de la progresividad en países de baja tributación: el impuesto a la renta en Guatemala

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Industria cultural y nuevos códigos de modernidad

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Baja cobertura de la seguridad social en América Latina: ¿un problema de incentivos o de exclusión social?

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Sobre la baja y estable carga fiscal en México

La baja carga tributaria, su elevada dependencia de los ingresos petroleros y su escaso efecto para reducir la concentración del ingreso son deficiencias fundamentales que limitan el desarrollo económico de México. El propósito del presente trabajo es examinar la evolución de largo plazo de los ingresos tributarios en México e identificar las causas detrás de su marcada estabilidad y debilidad. Para ello, en el trabajo se aborda el análisis de los elementos principales que han determinado la carga tributaria en el país y, a la vez, se hace un recuento crítico de algunos de los principales intentos y propuestas para instrumentar una reforma fiscal profunda. Dicho diagnóstico cierra con una sección de conclusiones en las que se apunta a la necesidad de hacer una reforma fiscal, que vaya mucho más allá de la que se puso en marcha en 2013, a fin de dotarlo de mayor equidad, eficiencia y capacidad recaudatoria que tanto urgen al desarrollo del país.

Desenvolvimento de um computador de bordo para veículo Baja-SAE

The objective of this paper is show the development of an Eletronic Control Unit (ECU) for Baja-SAE vehicles from its requirements to final implementation. An ECU for Baja-SAE vehicles is made of electric and electronic circuits (appropriated to the hostile situations of an off-road competition) able to make important measurements for the running or stand-by vehicle performance. For this development, some concepts were studied: embedded electronics concepts (mainly microcontrollers and data acquisition circuits) and sensoring. Both the studies were made considering the off-road environment. After these initial studies, the elaboration of the basics hardware and software (under simulations) has begun, and this elaboration objectives maximum performance and low implementation cost. After the theorical studies, basic definition of the hardware and software’s architectures and simulations, the printed circuit boards (PCB) were made, as exhaustive tests in these boards for debugging and verify if the boards work well. Once the system was tested in the university, it ran into a regional Southeast competition in 2010, that definitely proved the efficiency of the whole system

Influências do Projeto Baja SAE no ensino da engenharia e no desenvolvimento do aluno

This work aims to show the importance of Baja SAE Project in engineering education, as well as the development of the student, being an outstanding tool for the engineering student has an education that meets the objectives of the pedagogical university and also the guidelines Ministry of Education curriculum for engineering courses. The Baja SAE Project provides the engineering students the chance to apply in practice the knowledge acquired in the classroom, to enhance their preparation for the labor market. The student becomes involved with a real case of project development, from concept design, detailed design and construction. The Baja SAE Project redefines the position of the student as an active element in the learning process engineering, leaving behind the simple condition of receiving information. Values procedures that provide students the opportunity to learn in contexts of professional practice, while offering the opportunity to contextualize the execution of a project. From an analysis to develop personal skills, Baja SAE Project has its own characteristics and essential for professional practice, however, not specific to the engineering course. For example, capacity for teamwork, communication skills written and oral, ethical behavior, critical, overview, entrepreneurial spirit, leadership, etc

Otimização do braço inferior da suspensão dianteira do veículo Baja utilizando o método dos elementos finitos

Mass reduction coupled with the mechanical performance in service has been the goal of many projects related to the transport area, considering the advantages that mass reduction can bring. However, make a simple material substitution without design a new geometry to corroborate for the best component performance, often makes the replacement unviable. In this study, it was investigated the advantages of replacing the prototype BAJA SAE front suspension lower arm of Equipe Piratas do Vale de BAJA SAE - Universidade Paulista, Campus Guaratinguetá, actually produced with steel, for a new component made of carbon fiber composite. The new geometry has been developed to provide the best possible performance for this component and your easy manufacturing. The study was done using the 3D modeling tools and computer simulations via finite element method. The first stage of this work consisted on calculation of the estimated maximum contact force tire / soil in a prototype landing after jump at one meter high, drop test in the laboratory with the current vehicle, current front suspension lower arm 3D modeling, finite element simulation and analysis of critical regions. After all current component analysis, a new geometry for the part in study was designed and simulated in order to reduce the component mass and provide a technological innovation using composite materials. With this work it was possible to obtain a theoretical component mass reduction of 25,15% maintaining the mechanical strength necessary for the appropriated component performance when incited

Projeto mecânico do sistema de transmissão de um veículo Baja

This study aims to determine the best configuration for the new gearbox of the new Baja´s vehicle from Piratas do Vale team, focusing on the gear train, in order to achieve high performance of it. To this end, first some information about the vehicle is gathered to determine the best pair of gears configuration, then calculations about maximum bending stress, fatigue and surface thereof are performed; ; thereafter static simulations are performed using an a appropriated software. Thus this paper shows a satisfactory design of the addressed, besides providing the Baja SAE team consultation material for future use in the project

Processamento de peças em materiais compósitos para o projeto BAJA SAE

The weight of a vehicle has always been considered an extreme important factor, because it interferes in the performance, steering, consume, environmental impact, wear of components, among the others. Because of the new demand, consume reduction aim and gases emission increased the necessity to manufacture lighter vehicles, guaranteeing the complying with the gas emission international law. Besides the legal demand, the low weight will certainly be essential for the competitiveness for the next generation of vehicles. It is with this thinking the composite materials have been introduced in the automobilist industry, because those materials show an excellent relation of strength/weight, providing a reduction of consume and the increase of load capacity. Those factors justify the increase of interest of industry and the necessity of optimization of those materials and of their process. For this research, the field of application will be the Baja SAE Project, a project that is fully developed by engineering students, where they build a prototype single seat, off-road category, for use on hilly slopes with obstacle. This research aims to study two key components of the prototype are made of composite materials, analyzing all the processing. In addition, there is the analysis of the viability of this production parts to a Baja SAE vehicle, in order to increase their performance and reduce their weight without reducing the safety and robustness of the prototype. It was possible to achieve weight reduction of the steering subsystem with manufacturing the flywheel hybrid composite (carbon/glass) and the replacement of SAE 1010 steel by hybrid composite (carbon/aramid) in CVT box. The importance of this study is to obtain a good project for the vehicle of technical and scientific manner, contributing to the know-how to the team and providing a basis for optimization for upcoming projects

Estudo sobre o gerenciamento de projeto de desenvolvimento de um veículo Baja para competições

This paper presents a study of practices in project management of a college team that participates in Baja SAE competitions. The use of management techniques can deliver benefits to the project in terms of meeting customer needs, use of time and resources and minimization of risks, for example. Should be sought methods and techniques in agreement with the project context and the team that leads it. This paper analyzes a specific case of baja vehicle project management, obtaining data by means of literature research, archival research and interviews with students on the team (structured and unstructured). The study allowed to relate the practices used by the team and to identify possible areas for improvement, based on the literature on project management. There was thus obtained a set of recommendations for the current team, in future initiatives, and to other teams responsible for carrying out similar projects

Desconforto percebido em condutores de veículos baja: parâmetros para o design ergonômico do assento

O Projeto Baja SAE Brasil envolve várias competições relativas ao desempenho de equipes quanto ao projeto dos veículos desenvolvidos. Dentre as várias provas, são avaliadas as condições ergonômicas do condutor. O presente estudo objetivou avaliar a percepção do desconforto antes e após a realização da prova “enduro”. Participaram condutores titulares de seis equipes e os resultados apontam que o design do assento dos veículos deve ser desenvolvido com base em parâmetros ergonômicos.