Modelling and Simulation of ERTMS for Current and Future Mobile Technologies

Nowadays, train control in-lab simulation tools play a crucial role in reducing extensive and expensive on-site railway testing activities. In this paper, we present our contribution in this arena by detailing the internals of our European Railway Train Management System in-lab demonstrator. This demonstrator is built over a general-purpose simulation framework, Riverbed Modeler, previously Opnet Modeler. Our framework models both ERTMS subsystems, the Automatic Train Protection application layer based on movement authority message exchange and the telecommunication subsystem based on GSM-R communication technology. We provide detailed information on our modelling strategy. We also validate our simulation framework with real trace data. To conclude, under current industry migration scenario from GSM-R legacy obsolescence to IP-based heterogeneous technologies, our simulation framework represents a singular tool to railway operators. As an example, we present the assessment of related performance indicators for a specific railway network using a candidate replacement technology, LTE, versus current legacy technology. To the best of our knowledge, there is no similar initiative able to measure the impact of the telecommunication subsystem in the railway network availability.

The proposed Lune net limitation order 1999 and associated byelaws

The River Lune rises in the hills around Tebay in thje North of England and runs through rural farming country to Morecambe bay. It is generally considered as a river of high purity and unspoiled nature. The salmon fishery was at one time considered amongst the best in England and Wales, with very high catches to both rod and net fishermen. During the late 1960's the disease UDN decimated the stock. Since then there has been a recovery of the stock, but this is considered by most anglers and netsmen to be a partial recovery of some of the previous stock components. In recent years anglers and netsmen have voiced their concerns over the Lune stock and have lobbied for action to improve the Lune fishery. This net limitation order (NLO) and the separate byelaw in conjunction with habitat improvement are proposed as part of the strategy for future conservation and management of this salmon fishery. The fishery is currently exploited by 37 licensed netsmen, the highest number of any single estuary in England and Wales. There are 26 haaf, 10 drift and 1 seine nets available. Current estimates of the rod fishery are that 1100 to 1400 anglers fish 14 000 days per year. The River Luhe is one of the few rivers within England and Wales that has the benefit of an accurate fish counter. The counter is at Forge Weir approximately 4 km upstream of the tidal limit. The counts, together with records of the catches from the rod and net fishery, enable a reasonably accurate assessment of both rod and net exploitation. Extensive surveys of the juvenile population, carried out in 1991 and 1997, provide additional information. The purpose of this document is to describe and explain the current state of the salmon population in the River Lune and in doing so, demonstrate the current need for stock conservation. A second purpose is to demonstrate that the proposed NLO and byelaw package should allow the salmon population to reach its conservation target (spawning escapement target).

Organizações sociais na saúde: Rio Intransparente

O presente trabalho tem por objetivo analisar uma das diversas alterações decorrentes da contrarreforma do Estado brasileiro que tem incidido diretamente sobre o campo das políticas sociais: a adoção dos modelos privatizantes de gestão. A despeito do acirramento da questão social e consequente aumento da demanda por serviços sociais, o Estado tem caminhado numa via oposta. Focaliza as políticas sociais, precariza os serviços já existentes e drena recursos da seguridade social para sustentação das altas taxas de juros e pagamento da dívida pública. Somado a isso, para possibilitar a criação de novos espaços lucrativos, o Estado tem reeditado repetidamente diferentes instrumentos de privatização das políticas sociais as Organizações Sociais, as Organizações da Sociedade Civil de Interesse Público, as Fundações Estatais de Direito Privado e a Empresa Brasileira de Serviços Hospitalares processando-se, desta forma, um duplo favorecimento do capital na apropriação do fundo público. Desse modo, conferimos especial destaque às Organizações Sociais, instrumento privilegiado da operacionalização da modernização da gestão da rede de serviços da atual gestão municipal da política de saúde carioca. Buscamos analisar as tendências da alocação dos recursos orçamentários da saúde no Rio de Janeiro (Função Saúde e Fundo Municipal), os contratos de gestão a fim de captar os processos de privatização, focalização e mercantilização da saúde, no período de 2009-2010. Nesse contexto, revelou-se uma profunda falta de transparência nos gastos públicos com a política de saúde carioca que perpassa os recursos destinados ao Fundo Municipal de Saúde, mas também se expressa nos inúmeros repasses financeiros muitas vezes elevados e sem justificativas palpáveis destinados às Organizações Sociais. Desse modo, a efetivação das ações e serviços do Sistema Único de Saúde (SUS) fica relegada ao segundo plano e põe-se na ordem do dia o favorecimento do capital através de uma apropriação cada vez maior do fundo público.

Influence of oxygen partial pressure on the structure and photoluminescence of direct current reactive magnetron sputtering ZnO thin films

The effects of oxygen partial pressure on the structure and photoluminescence (PL) of ZnO films were studied. The films were prepared by direct current (DC) reactive magnetron sputtering with various oxygen concentrations at room temperature. With increasing oxygen ratio, the structure of films changes from zinc and zinc oxide phases, single-phase ZnO, to the (002) orientation, and the mechanical stresses exhibit from tensile stress to compressive stress. Films deposited at higher oxygen pressure show weaker emission intensities, which may result from the decrease of the oxygen vacancies and zinc interstitials in the film. This indicates that the emission in ZnO film originates from the oxygen vacancy and zinc interstitial-related defects. From optical transmittance spectra of ZnO films, the plasma edge shifts towards the shorter wavelength with the improvement of film stoichiometry. (C) 2004 Elsevier B.V. All rights reserved.