SPf66 vaccine trial in Brazil: conceptual framework study design and analytical approach

This paper describes the study population and the study design of the phase III field trial of the SPf66 vaccine in Brazil. Assessment of validity and precision principles necessary for the appropriate evaluation of the protective effect of the vaccine are discussed, as well as the results of the preliminary analyses of the gathered data. The analytical approach for the estimation of the protective effect of the vaccine is presented. This paper provides the conceptual framework for future publications.

Design and development of the architecture of an agricultural mobile robot

Parameters such as tolerance, scale and agility utilized in data sampling for using in Precision Agriculture required an expressive number of researches and development of techniques and instruments for automation. It is highlighted the employment of methodologies in remote sensing used in coupled to a Geographic Information System (GIS), adapted or developed for agricultural use. Aiming this, the application of Agricultural Mobile Robots is a strong tendency, mainly in the European Union, the USA and Japan. In Brazil, researches are necessary for the development of robotics platforms, serving as a basis for semi-autonomous and autonomous navigation systems. The aim of this work is to describe the project of an experimental platform for data acquisition in field for the study of the spatial variability and development of agricultural robotics technologies to operate in agricultural environments. The proposal is based on a systematization of scientific work to choose the design parameters utilized for the construction of the model. The kinematic study of the mechanical structure was made by the virtual prototyping process, based on modeling and simulating of the tension applied in frame, using the.

A Design Methodology for the Compensation of Positioning Deviation in Gantry Manipulators

This work presents recent results concerning a design methodology used to estimate the positioning deviation for a gantry (Cartesian) manipulator, related mainly to structural elastic deformation of components during operational conditions. The case-study manipulator is classified as gantry type and its basic dimensions are 1,53m x 0,97m x 1,38m. The dimensions used for the calculation of effective workspace due to end-effector path displacement are: 1m x 0,5m x 0,5m. The manipulator is composed by four basic modules defined as module X, module Y, module Z and terminal arm, where is connected the end-effector. Each module controlled axis performs a linear-parabolic positioning movement. The planning path algorithm has the maximum velocity and the total distance as input parameters for a given task. The acceleration and deceleration times are the same. Denavit-Hartemberg parameterization method is used in the manipulator kinematics model. The gantry manipulator can be modeled as four rigid bodies with three degrees-of-freedom in translational movements, connected as an open kinematics chain. Dynamic analysis were performed considering inertial parameters specification such as component mass, inertia and center of gravity position of each module. These parameters are essential for a correct manipulator dynamic modelling, due to multiple possibilities of motion and manipulation of objects with different masses. The dynamic analysis consists of a mathematical modelling of the static and dynamic interactions among the modules. The computation of the structural deformations uses the finite element method (FEM).

Optimal design of 3R manipulators by using classical techniques and simulated annealin

In this paper, the optimum design of 3R manipulators is formulated and solved by using an algebraic formulation of workspace boundary. A manipulator design can be approached as a problem of optimization, in which the objective functions are the size of the manipulator and workspace volume; and the constrains can be given as a prescribed workspace volume. The numerical solution of the optimization problem is investigated by using two different numerical techniques, namely, sequential quadratic programming and simulated annealing. Numerical examples illustrate a design procedure and show the efficiency of the proposed algorithms.

The Banco Central do Brasil's institutional framework after ten years

The Banco Central do Brazil (BACEN) adopted inflation targeting in 1999. This monetary policy regime originates in institutional design which remains crucial today for the expectations management, and is in permanent evolution. After 10 years, the BACEN institutional framework is assessed, asking if there is still room for improvement. Various institutional procedures are analysed, and lessons are drawn from the international experience of a panel of sixteen countries. Some proposals for the BACEN institutional framework are made.

Fatores visuais de design e sua influência nos valores de compra do consumidor

Este artigo explora o tema das experiências dos consumidores nos ambientes físicos oferecidos pelas empresas de serviços, avaliando o impacto de fatores visuais de design sobre a percepção de valor por parte dos clientes de um ponto de venda com autosserviço. Foram identificados os valores de compra dos usuários e as características de design percebidas no âmbito do varejo de autosserviço, envolvendo leiaute, sinalização e iluminação presentes no ambiente. O valor de compra, considerado uma resposta interna do consumidor ao ambiente de varejo, incluiu dimensões utilitárias e hedônicas. O método aplicado foi o cross-sectional survey, com a aplicação de questionário a 274 estudantes universitários, os quais manifestaram sua percepção de três diferentes livrarias com autoatendimento, ilustradas por fotos. Os resultados obtidos apontaram quatro características de design com influência significativa na formação de valor de compra dos consumidores sob a perspectiva utilitária e hedônica.

USE AND CONSEQUENCES OF PARTICIPATORY GIS IN A MEXICAN MUNICIPALITY: APPLYING A MULTILEVEL FRAMEWORK

This paper seeks to understand the use and the consequences of Participatory Geographic Information System (PGIS) in a Mexican local community. A multilevel framework was applied, mainly influenced by two theoretical lenses – structurationist view and social shaping of technology – structured in three dimensions – context, process and content – according to contextualist logic. The results of our study have brought two main contributions. The first is the refinement of the theoretical framework in order to better investigate the implementation and use of Information and Communication Technology (ICT) artifacts by local communities for social and environmental purposes. The second contribution is the extension of existing IS (Information Systems) literature on participatory practices through identification of important conditions for helping the mobilization of ICT as a tool for empowering local communities.

Ensuring dynamic strategic fit of firms that compete globally in alliances and networks: proposing the Global SNA - Strategic Network Analysis - framework

In order to sustain their competitive advantage in the current increasingly globalized and turbulent context, more and more firms are competing globally in alliances and networks that oblige them to adopt new managerial paradigms and tools. However, their strategic analyses rarely take into account the strategic implications of these alliances and networks, considering their global relational characteristics, admittedly because of a lack of adequate tools to do so. This paper contributes to research that seeks to fill this gap by proposing the Global Strategic Network Analysis - SNA - framework. Its purpose is to help firms that compete globally in alliances and networks to carry out their strategic assessments and decision-making with a view to ensuring dynamic strategic fit from both a global and relational perspective.

Reflexões para um framework da informação de custos do setor público brasileiro

O presente artigo sumariza uma proposta de framework da informação de custos para o setor público no Brasil. A proposta emergiu de contribuições promovidas pelo governo central no Brasil na realização de duas equipes de trabalho, a primeira pela comissão interministerial em 2005, e a segunda coordenada pelo Ministério da Fazenda em 2008/09. Essas contribuições foram validadas em relação às críticas veiculadas no meio acadêmico quanto às estruturas conceituais da contabilidade financeira (framework) emitidas pelo International Accounting Standards Board e Financial Accounting Standards Board, e em relação à literatura internacional de implantação de sistemas de custos no setor público. A adoção de um sistema de custos é exigida para as entidades públicas no Brasil desde 1964; entretanto, somente agora é objeto de um trabalho conduzido pelo Ministério da Fazenda para o governo federal, cujos primeiros resultados serão divulgados neste ano. O acórdão emitido pelo Tribunal de Contas da União em 2004, determinando que a legislação seja observada, tende a ampliar tal adoção. Contudo, a adoção não é suficiente, é necessária a utilização, que é função da relevância percebida da informação de custos. Sugere-se que a difusão da adoção e uso de sistemas de custos no setor público brasileiro seja feita através de uma implantação gradual, flexível, mediante a adoção do regime de competência, e baseada num framework único e comum às diversas entidades.

Capacidades dinâmicas e rituais de interação entre alta e média gerência: proposta de um framework

O presente artigo foi desenvolvido considerando situações de incerteza ambiental, em que a ordem do dia ou questão estratégica (strategic issue) é a inovação dos recursos, ou seja, transformação, renovação ou desenvolvimento de uma nova capacidade funcional (ordinária). Com o objetivo de compreender como as capacidades dinâmicas desempenham esse papel na inovação dos ativos organizacionais em tais contextos ambientais, propõe-se aqui uma perspectiva alternativa de análise a partir de uma vertente microssociológica, a qual recorre aos elementos constitutivos de rituais de interação segundo Collins (2004). Essa perspectiva oferece possibilidades de investigação da influência das conversações estratégicas, que ocorrem em meio a práticas ritualísticas de interação entre alta e média gerência, sobre o potencial de inovação das capacidades organizacionais. Para compreensão da articulação teórica realizada no trabalho, apresenta-se um framework de análise que agrega a incerteza no nível macro com variáveis comportamentais e organizacionais no nível micro, enquanto elementos mais salientes dos rituais de interação. Visando estudos futuros e melhor compreensão do framework do trabalho, são apresentadas proposições acerca das relações do modelo após o detalhamento da estrutura analítica.