259 research outputs found

    A survey on constructing rosters for air traffic controllers

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    In this survey the state-of-the-art technology and the literature to date are discussed. In particular, we will discuss the gap in the literature concerning rostering staff to tasks by qualifications, with the inclusion of restrictions on a measure of task familiarity, which is a unique consequence of the structure of ATC operations

    Sustainable Disruption Management

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    NOSTROMO - D5.2 - ATM Performance Metamodels - Final Release

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    This deliverable presents the third iteration of the development of the two micromodels Flitan and Mercury and the results obtained with them with the active learning process, as described in the deliverables D3.X. In this iteration, Flitan implemented concepts from PJ08.01 and PJ02.08, and Mercury implemented a module related to PJ07.02. Mercury also developed an additional module related to PJ01.01, which description is presented in Annex only, since no results could be produced in time with it for this deliverable. The development is presented in two different chapters for each simulator, with general descriptions referred to from D5.1. The modules related to each SESAR solution are described separately. The latest version of the meta-modelling process is described briefly, followed by the results obtained with the two simulators, in distinct sections. This chapter shows the performance of the meta-model with respect to approximating micro simulators

    Determinação de escalas de serviço para Controladores de Tráfego Aéreo : um modelo matemático

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    Orientador: Prof. Dr. Cassius Tadeu ScarpinMonografia (especialização) - Universidade Federal do Paraná, Setor de Tecnologia, Curso de Especialização em Gestão de Suprimentos.Inclui referênciasResumo : Resumo: O espaço aéreo sob responsabilidade brasileira passa dos 20.000.000Km² (vinte milhões de km²). Serviços de Tráfego Aéreo funcionam ininterruptamente para garantir a segurança de todas as aeronaves no espaço aéreo. Este artigo apresenta um modelo matemático de programação inteira desenvolvido para a designação de escalas de serviço para operadores de um Centro de Controle de Área, onde se realiza o controle de Tráfego Aéreo. A proposição deste modelo objetiva a maximização das preferências declaradas pelos Controladores, considerando as restrições obrigatórias (restrições hard) e as restrições opcionais ou de qualidade (restrições soft). Foram resolvidos problemas de tamanhos reais com aproximadamente 100 operadores, para um período de 30 dias. Obteve-se a otimalidade da solução utilizando o solver GUROBI em aproximadamente quatro minutos e meio. Os ganhos de qualidade de solução e tempo de obtenção da solução em relação a forma atual de elaboração das escalas foram significativos, mostrando a eficiência e a vantagem em utilizar o modelo proposto.Abstract : The air space under Brazilian responsibility has 20,000,000 km² (twenty million km²). Air Traffic Services operate uninterruptedly to ensure the safety of all aircraft in the airspace. This article presents a mathematical model of linear programming developed for the designation of the schedule of service for operators of an Area Control Center, where air traffic control is performed. The proposition of this model aims at maximizing the preferences declared by the Controllers, considering the mandatory restrictions (hard constraints) and the optional or quality restrictions (soft constraints). Real-size problems were solved with approximately 100 operators for 30 days. The optimality of the solution was obtained using the GUROBI solver. The solution was obtained in approximately four and a half minutes. The solution quality gains and the time to obtain the solution compared to the current form of elaboration of the scales were significant, showing the efficiency and the advantage in using the proposed model

    Decision Support for the Rolling Stock Dispatcher

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    Work schedule stress and wellness in female air cabin attendants

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    Bibliography: pages 140-155.The research investigated Work Schedule Stress experienced by female air cabin attendants (CAs) employed by South African Airways and its relationship to health variables in CAs. Specifically, it was hypothesised that Work Schedule Stress is an important stressor for CAs and is inversely related to health variables. Furthermore, the variables of Potency, Trait Anxiety, Trait Anger, and Social Support were proposed to moderate the relationship between Work Schedule Stress and the health variables. Data were collected from a sample of 108 domestic crew and 43 international crew. The data collection was conducted in two phases, via interviews and self-report inventories. The interview data were used in a qualitative study but were also content-analysed in terms of a number of dimensions; the latter were included with the quantitative data obtained from the questionnaire. The qualitative analysis, based on the grounded theory approach, formed the backbone of the research. The quantitative data were subjected to correlational analysis, supplemented by subgroup analysis to assess moderator effects. Work Schedule Stress was demonstrated to represent a major stress for CAs with consequent adverse effects on health. The results did not provide support for the moderating effects. Conclusions were drawn, recommendations made to the SAA and CAs themselves of means to enhance wellness, and suggestions for future research proposed
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