Acessibilidade nas vias turísticas da área central de Foz do Iguaçu : um retrato do "Projeto Calçadas"

Orientador : Cícero Fernandes MarquesProjeto Técnico (especialização) - Universidade Federal do Paraná, Setor de Ciências Sociais Aplicadas. Curso de Especialização em Gestão Pública MunicipalInclui referênciasResumo: O presente trabalho se propõe a traçar um panorama atual das condições de trafegabilidade de pedestres em algumas calçadas públicas de Foz do Iguaçu, cidade situada no extremo-oeste do Estado do Paraná. Foz do Iguaçu é uma das poucas cidades brasileiras que possui legislação municipal específica definindo as condições físico/estruturais das calçadas públicas. Esta legislação denominou algumas ruas de Foz do Iguaçu como "Vias Turísticas" – devido estas interligarem os principais atrativos turísticos do município. O presente trabalho destina-se a avaliar as condições de acessibilidade das calçadas públicas destas ruas, nos trechos em que as mesmas passam pela área central da cidade. O prazo previsto na legislação para adequação destas vias às condições previstas foi de 3 (três) anos - tendo este se no expirado em 14 de dezembro de 2008. Até hoje algumas calçadas que deveriam ter sido construídas neste prazo, não o foram. É objetivo principal deste trabalho a análise não somente dos acertos, mas principalmente dos erros cometidos pelo Poder Público na condução destas adequações. Baseadas nestas verificações faz parte dos objetivos do presente trabalho, em caráter secundário, a sugestão de alteração na política pública de execução destas adequações propondo nova alternativa de gerenciamento do programa

Technique and results after immediate orthotopic replantation of extracorporeally irradiated tumor bone autografts with and without fibular augmentation in extremity tumors

BACKGROUND Reconstruction of the skeletal defects resulting from the resection of bone tumors remains a considerable challenge and one of the possibilities is the orthotopic replantation of the irradiated bone autograft. One technical option with this technique is the addition of a vital autologous fibular graft, with or without microvascular anastomosis. The aim of our study was to evaluate the clinical results of the treatment of our patient cohort with a specific view to the role of fibular augmentation. METHODS Twenty-one patients with 22 reconstructions were included. In all cases, the bone tumor was resected with wide margins and in 21 of them irradiated with 300 Gy. In the first case, thermal sterilization in an autoclave was used. The autograft was orthotopically replanted and stabilized with plates and screws. Fifteen patients underwent an additional fibular augmentation, 8 of which received microvascular anastomoses or, alternatively, a locally pedicled fibular interposition. RESULTS the most common diagnosis was a Ewing sarcoma (8 cases) and the most common location was the femur (12 cases). The mean follow-up time was 70 months (16-154 months). For our statistical analysis, the one case with autoclave sterilization and 3 patients with tumors in small bones were excluded. During follow-up of 18 cases, 55.6% of patients underwent an average of 1.56 revision surgeries. Complete bony integration of the irradiated autografts was achieved in 88.9% of cases after 13.6 months on average. In those cases with successful reintegration, the autograft was shorter (n.s.). Microvascular anastomosis in vascularized fibular strut grafts did not significantly influence the rate of pseudarthrosis. CONCLUSIONS the replantation of extracorporeally irradiated bone autografts is an established method for the reconstruction of bone defects after tumor resection. Our rate of complications is comparable to those of other studies and with other methods of bone reconstruction (e.g. prosthesis). In our opinion, this method is especially well suited for younger patients with extraarticular bone tumors that allow for joint preservation. However, these patients should be ready to accept longer treatment periods

A Novel Energy Management Control Technique for PV-Battery System in DC Microgrids

This paper presents a new energy management control technique for PV-Battery system used in DC microgrids. The proposed control technique is performed based on a droop control algorithm that maintains DC-bus voltage in a desirable and required range adaptively. Tightly Regulating the bus voltage In the islanded mode of operation is very challenging. However, the proposed control method by introducing a nonlinear droop profile with four adaptive parameters shows its superiority. Adaptive parameters determined by the non-linear optimal algorithms. Tightly regulating the DC bus voltage during extensive changes in demand loads/sources within a DC Micro Grid is the responsibility of the adaptive parameters. Stability of the proposed method in the whole system for a very broad range of operating conditions are proved. Simulation results along with the experimental results verify the feasibility of the proposed approach while demonstrate its superior performance compared to the conventional control method

Multiphase induction motor drives - a technology status review

The area of multiphase variable-speed motor drives in general and multiphase induction motor drives in particular has experienced a substantial growth since the beginning of this century. Research has been conducted worldwide and numerous interesting developments have been reported in the literature. An attempt is made to provide a detailed overview of the current state-of-the-art in this area. The elaborated aspects include advantages of multiphase induction machines, modelling of multiphase induction machines, basic vector control and direct torque control schemes and PWM control of multiphase voltage source inverters. The authors also provide a detailed survey of the control strategies for five-phase and asymmetrical six-phase induction motor drives, as well as an overview of the approaches to the design of fault tolerant strategies for post-fault drive operation, and a discussion of multiphase multi-motor drives with single inverter supply. Experimental results, collected from various multiphase induction motor drive laboratory rigs, are also included to facilitate the understanding of the drive operatio

Half-Bridge Full-Bridge AC–DC Resonant Converter for Bi-Directional EV Charger

A new topology and controller based on single-stage AC-DC resonant converter, without Electrolytic capacitors (E-cap), for bi-directional EV battery chargers is proposed in this paper. The topology is a Half-Bridge (HB)-Full-Bridge (FB) resonant converter with MOSFET’s connected in series and in opposite direction on its AC Half-Bridge side plus an active filter on the DC-side. No use of E-cap makes the converter more reliable. The establishment of an appropriate control scheme enables a wide range of active and reactive power control under different AC and DC voltage levels. The proposed controller not only facilitates the converter to operate under Zero Voltage Switching (ZVS) for all switching instants, but also it minimizes the conduction loss. ZVS allows higher switching frequencies and together with reduction in conduction losses improves the efficiency. The active filter is controlled to absorb the low frequency current ripple and prevent it from going to battery. Charging the battery with reduced low frequency ripple prevents extra heat production and increases the lifespan of the battery. Mathematical analysis, simulation and experimental results are presented