43,106 research outputs found

    A Model for Selecting the Most Cost-Effective Pressure Control Device for More Sustainable Water Supply Networks

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    Pressure Reducing Valves (PRV) have been widely used as a device to control pressure at nodes in water distribution networks and thus reduce leakages. However, an energy dissipation takes place during PRV operation. Thus, micro-hydropower turbines and, more precisely, Pump As Turbines (PAT) could be used as both leakage control and energy generating devices, thus contributing to a more sustainable water supply network. Studies providing clear guidelines for the determination of the most cost-effective device (PRV or PAT) analysing a wide database and considering all the costs involved, the water saving and the eventual power generation, have not been carried out to date. A model to determine the most cost-effective device has been developed, taking into account the Net Present Value (NPV). The model has been applied to two case studies: A database with 156 PRVs sites located in the UK; and a rural water supply network in Ireland with three PRVs. The application of the model showed that although the investment cost associated to the PRV installation is lower in the majority of cases, the NPV over the lifespan of the PAT is higher than the NPV associated with the PRV operation. Furthermore, the ratio between the NPV and the water saved over the lifespan of the PAT/PRV also offered higher values (from 6% to 29%) for the PAT installation, making PATs a more cost-effective and more sustainable means of pressure control in water distribution networks. Finally, the development of less expensive turbines and/or PATs adapted to work under different flow-head conditions will tip the balance toward the installation of these devices even further

    Interpersonal emotion regulation: a review of social and developmental components

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    A staple theme in clinical psychology, emotion regulation, or the ability to manage one's emotions, is directly linked with personal wellbeing and the ability to effectively navigate the social world. Until recently, this concept has been limited to a focus on intrapersonal processes, such as suppression. Less emphasis has been placed on developmental, social, and cultural aspects of emotion regulation. We argue here that as social beings, our engagement in emotion regulation may often occur interpersonally, with trusted others helping us to regulate our emotions. This review will highlight recent research on interpersonal emotion regulation processes.Dr Hofmann receives financial support from the Alexander von Humboldt Foundation (as part of the Humboldt Prize), NIH/NCCIH (R01AT007257), NIH/NIMH (R01MH099021, U01MH108168), and the James S. McDonnell Foundation 21st Century Science Initiative in Understanding Human Cognition - Special Initiative. He receives compensation for his work as an advisor from the Palo Alto Health Sciences and for his work as a Subject Matter Expert from John Wiley & Sons, Inc. and SilverCloud Health, Inc. He also receives royalties and payments for his editorial work from various publishers. (Alexander von Humboldt Foundation; R01AT007257 - NIH/NCCIH; R01MH099021 - NIH/NIMH; U01MH108168 - NIH/NIMH; James S. McDonnell Foundation 21st Century Science Initiative in Understanding Human Cognition - Special Initiative)Accepted manuscrip

    The NGO Sector in Community Development: Emerging roles, strategies and identities

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    This community engaged thesis will articulate some of the identities, patterns, and dominant practices of NGOs related to community development in the hope of uncovering emerging trends. The literature review of this thesis will have a slight focus on NGO’s working in direct conjunction with the HIV/AIDS epidemic in sub-Saharan Africa. In addition, it will manifest the promise of social capital as necessary to an organization’s success. Civic participation remains critical in enabling an NGO to be politically active, to continue building networks, and instilling positive social attitudes. After expounding on these issues, this thesis will then propose a solution- more specifically, a model- that attempts to relate field research findings to current grassroot initiatives that have succeeded in achieving community development through youth empowerment and education in Rhode Island. The strategy of youth empowerment and civic engagement is an effective model for community development and positive social change. By sharing insights and identifying best practices, the NGO sector can enhance coordination and partnerships for effective country-level implementation of youth development initiatives. The author hopes that the findings of this thesis and her field research will be employed and utilized in the development of progressive community-based organizations dedicated to combating the HIV/AIDS virus in Africa

    The Future of Disability in Alaska Summit & Follow-up Survey

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    The Future of Disability in Alaska Summit was held in Anchorage in the summer of 2013, May 9-10. The purpose was to gather perspectives from a diverse group of stakeholders to inform a vision of the future for people with disabilities in Alaska in five broad topical areas: 1) Housing Arrangements, 2) Advocacy, 3) Relationships, 4) Economic Wellbeing, and 5) Health. About 76 stakeholders participated in the summit including people with disabilities, family members, advocates, service providers, policymakers, and others. A follow-up online survey was conducted to gather information from a broader range of stakeholders and to get a sense of the highest priorities in each area. The purpose of the report and other products coming out of this effort is to inspire stakeholders to periodically reflect, individually and in groups, on how they are working toward the vision in a relevant area and taking action in the context of advocacy, policy/regulation, funding, and services/resources. The report states a vision for each of the five topical areas and includes many suggested strategies to accomplish it.Funded in part by Grant Number T7320663 from the Maternal and Child Health Bureau, Health Resources and Services Administration; and Grant Number 90DD0009-02-00 from the Administration on Intellectual and Developmental Disabilities, Administration for Community Living; both in the U.S. Department of Health and Human ServicesList of Tables / Executive Summary / Introduction / Method / Participants / Result

    The Lifecycle and Cascade of WeChat Social Messaging Groups

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    Social instant messaging services are emerging as a transformative form with which people connect, communicate with friends in their daily life - they catalyze the formation of social groups, and they bring people stronger sense of community and connection. However, research community still knows little about the formation and evolution of groups in the context of social messaging - their lifecycles, the change in their underlying structures over time, and the diffusion processes by which they develop new members. In this paper, we analyze the daily usage logs from WeChat group messaging platform - the largest standalone messaging communication service in China - with the goal of understanding the processes by which social messaging groups come together, grow new members, and evolve over time. Specifically, we discover a strong dichotomy among groups in terms of their lifecycle, and develop a separability model by taking into account a broad range of group-level features, showing that long-term and short-term groups are inherently distinct. We also found that the lifecycle of messaging groups is largely dependent on their social roles and functions in users' daily social experiences and specific purposes. Given the strong separability between the long-term and short-term groups, we further address the problem concerning the early prediction of successful communities. In addition to modeling the growth and evolution from group-level perspective, we investigate the individual-level attributes of group members and study the diffusion process by which groups gain new members. By considering members' historical engagement behavior as well as the local social network structure that they embedded in, we develop a membership cascade model and demonstrate the effectiveness by achieving AUC of 95.31% in predicting inviter, and an AUC of 98.66% in predicting invitee.Comment: 10 pages, 8 figures, to appear in proceedings of the 25th International World Wide Web Conference (WWW 2016

    From positive youth development to youth’s engagement : the dream teens

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    In addition to the empirical validation of ‘health and happiness’ determinants, theoretical models suggesting where to ground actions are necessary. In the beginning of the twentieth century, intervention models focused on evaluation and empirical validation were only concerned about overt behaviours (verbal and non-verbal) and covert behaviours (cognitions and emotions). Later on in the middle of the century, there was a shift from treating the problems to a positive approach, focused on promoting assets and individual strengths. Thus, the role of social competences, self-regulation and resilience became salient. Researchers also highlighted the importance of social cohesion and social support, as active health and wellbeing facilitators. More recently, in the twentyfirst century, the population’s engagement (positive engagement) has become crucial. This paper presents the evolution of this theoretical and scientific path, using Portugal as a case study, where early interventions focused on the positive aspects of both covert and overt behaviours, while more recent interventions included explicitly the perspective of youth engagement and participation, as is the case of the Dream Teens Project. It is expected that the political and professional understanding of this trajectory will allow professionals to provide better health and educational services, improving young people’s engagement, quality of life, health and wellbeingpeer-reviewe
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