546,587 research outputs found

    Conceptualizing Organizational Domains of Community Empowerment through Empowerment Evaluation in Estonian Communities

    Get PDF
    The importance of community empowerment has been strongly emphasized in health promotion publications in Western societies. Only a few studies exist to highlight the empowerment processes in countries in transition in Eastern Europe. A multi-stage study was designed to develop a context-specific survey instrument appropriate for evaluating the changes in the community empowerment process within the context of health promotion programs in Rapla, Estonia. The current study comprises the first stage, which aims to identify and systematize empowering domains and activities perceived by community members during the empowerment evaluation process. Semi-structured interviews were undertaken with sixteen participants from three health promotion programs. Purposive sampling was used, and data were analyzed using constant comparison. The findings suggest that there are four key organizational domains that characterize the community empowerment process in Rapla: activation of the community, competence development of the community, program management development, and creation of a supportive environment

    Simultaneous column-and-row generation for large-scale linear programs with column-dependent-rows

    Get PDF
    In this paper, we develop a simultaneous column-and-row generation algorithm for a general class of large-scale linear programming problems. These problems typically arise in the context of linear programming formulations with exponentially many variables. The defining property for these formulations is a set of linking constraints. These constraints are either too many to be included in the formulation directly, or the full set of linking constraints can only be identified, if all variables are generated explicitly. Due to this dependence between columns and rows, we refer to this class of linear programs as problems with column-dependent-rows. To solve these problems, we need to be able to generate both columns and rows on the fly within an efficient solution method. We emphasize that the generated rows are structural constraints and distinguish our work from the branch-and-cut-and-price framework. We first characterize the underlying assumptions for the proposed column-and-row generation algorithm and then introduce the associated set of pricing subproblems in detail. The proposed methodology is demonstrated on numerical examples for the multi-stage cutting stock and the quadratic set covering problems

    Simultaneous column-and-row generation for large-scale linear programs with column-dependent-rows

    Get PDF
    In this paper, we develop a simultaneous column-and-row generation algorithm that could be applied to a general class of large-scale linear programming problems. These problems typically arise in the context of linear programming formulations with exponentially many variables. The defining property for these formulations is a set of linking constraints, which are either too many to be included in the formulation directly, or the full set of linking constraints can only be identified, if all variables are generated explicitly. Due to this dependence between columns and rows, we refer to this class of linear programs as problems with column-dependent-rows. To solve these problems, we need to be able to generate both columns and rows on-the-fly within an efficient solution approach. We emphasize that the generated rows are structural constraints and distinguish our work from the branch-and-cut-and-price framework. We first characterize the underlying assumptions for the proposed column-and-row generation algorithm. These assumptions are general enough and cover all problems with column-dependent-rows studied in the literature up until now to the best of our knowledge. We then introduce in detail a set of pricing subproblems, which are used within the proposed column-and-row generation algorithm. This is followed by a formal discussion on the optimality of the algorithm. To illustrate the proposed approach, the paper is concluded by applying the proposed framework to the multi-stage cutting stock and the quadratic set covering problems

    Scaling Success: Lessons from Adaptation Pilots in the Rainfed Regions of India

    Get PDF
    "Scaling Success" examines how agricultural communities are adapting to the challenges posed by climate change through the lens of India's rainfed agriculture regions. Rainfed agriculture currently occupies 58 percent of India's cultivated land and accounts for up to 40 percent of its total food production. However, these regions face potential production losses of more than $200 billion USD in rice, wheat, and maize by 2050 due to the effects of climate change. Unless action is taken soon at a large scale, farmers will see sharp decreases in revenue and yields.Rainfed regions across the globe have been an important focus for the first generation of adaptation projects, but to date, few have achieved a scale that can be truly transformational. Drawing on lessons learnt from 21 case studies of rainfed agriculture interventions, the report provides guidance on how to design, fund and support adaptation projects that can achieve scale
    corecore