Gestión de la informática en las empresas ferroviarias de América Latina y España

Incluye Bibliografía

Problemas sociales y económicos en Cuba durante la crisis y la recuperación

Incluye Bibliografía

Informe de la Reunión sobre Estadísticas Agropecuarias en los Sistemas Nacionales de Información en el Istmo Centroamericano (Tegucigalpa, Honduras, 4 y 5 de diciembre de 2003)

Incluye Bibliografía

Servicios públicos y regulación

Incluye Bibliografía

Mediação em fóruns educacionais de curso online de língua estrangeira (espanhol)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Economic survey of Latin America, 1982: Saint Christopher and Nevis: preliminary version

Includes bibliography

Economic survey of Latin America, 1982: Trinidad and Tobago: preliminary version

Includes bibliography

Economic survey of Latin America, 1982: Antigua and Barbuda: preliminary version

Includes bibliography

Ambiente de moradia e controle primário em idosos

Este trabalho investigou a relação entre ambiente de moradia e duas modalidades de controle percebido controle primário (CP) e controle secundário (CS), referentes a esforços empreendidos para adaptar o ambiente às próprias necessidades e realizar metas (CP); adaptar-se ao ambiente (CS). Participaram 315 idosos (105 homens; 210 mulheres) residentes em Brasília-DF, entre 60 e 92 anos, selecionados de forma não-probabilística, por cotas de gênero. Os dados foram coletados no domicílio por meio de entrevista incluindo questões sócio-demográficas e uma escala de controle. Os resultados apontam: (1) Relação inversa entre CP e densidade social do ambiente de moradia - DESAM (r = -0,119; p ≤ 0,05); (2) Percepção de controle significativamente maior nos que dispunham de quarto exclusivo (t = 2,21; df = 313; p ≤ 0,05). Conclui-se que baixa DESAM facilita o CP nessa fase da vida em que muitas atividades são realizadas no domicílio, convertendo a liberdade de ação e a privacidade em necessidades importantes.

As dimensões internacionais das políticas brasileiras de combate ao tráfico de drogas na década de 1990

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ocorrência de microrganismos periodontopatogênicos em pacientes com dependência química

Drug addiction won dramatic aspects in terms of its dimensions and the effects that it imposes. These chemical agents are able to reduce the immune reactivity and tissue repair, and enhance microbial aggression, aggravating the destruction of the periodontium and other side effects. This study aimed to evaluate the presence of key periodontal pathogens in the mouth of drug addiction patients, comparing it with individuals who do not exhibit this dependence, as well as assess the influence of oral conditions on the occurrence of such microorganisms. For this purpose, data on systemic health conditions, socioeconomic, patterns of licit or illicit drug consumption of 100 patients with chemical dependency kept in rehabilitation clinics and an equal number of non-dependent patients, who formed the control group were obtained. Intra and extraoral clinical examinations were performed and samples of supragingival and subgingival biofilm, saliva and mucous membranes were collected. The presence of the targeted microorganism was assessed by polymerase chain reaction (PCR). It was found that Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola showed close correlation with bone loss and gingival bleeding in drug addiction dependents and control group, but the oral mucous membranes and saliva of addicts showed higher occurrence of these pathogens.

Zonas Estratégicas e Estruturais para os Trânsitos Ilícitos (ZEETI): desafios à zona de paz na América do Sul

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Diseño, implementación y verificación de un controlador para robots educativos

[EN] This project briefly analyzes the scope and applications of Industrial Robotics, as well as the importance that this technical discipline has gained in the past decades. In addition, it proposes a modern platform to assist in teaching this discipline in colleges and universities. This new educational platform for the teaching of Industrial Robotics is based on the robotic systems from Rhino Robotics Ltd., using the existing robotic arms and replacing the control electronics by a newer, modern and yet backwards-compatible controller. In addition to the controller, this platform also provides new, up-to-date software utilities that are more intuitive than those provided with the old system. The work to be done consists essentially in receiving commands from a personal computer which the controller must interpret in order to control the motors of the robotic arm. The controller itself will be implemented as an embedded system based on microcontrollers. This requires the implementation of a communication protocol between the personal computer and the microcontroller, the design of a command interpreter, the design of the electronics for motor control using PWM and H-bridges, and the implementation of control techniques (more precisely, PID control). Hence, this project combines software and hardware design and integration techniques with motor control techniques and feedback control methods from Control Engineering, along with the kinematic analysis of the Rhino XR-4 robotic arm.