60 research outputs found

    Coalition Formation Algorithm of Prosumers in a Smart Grid Environment

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    In a smart grid environment, we study coalition formation of prosumers that aim at entering the energy market. It is paramount for the grid operation that the energy producers are able to sustain the grid demand in terms of stability and minimum production requirement. We design an algorithm that seeks to form coalitions that will meet both of these requirements: a minimum energy level for the coalitions and a steady production level which leads to finding uncorrelated sources of energy to form a coalition. We propose an algorithm that uses graph tools such as correlation graphs or clique percolation to form coalitions that meet such complex constraints. We validate the algorithm against a random procedure and show that, it not only performs better in term of social welfare for the power grid, but also that it is more robust against unforeseen production variations due to changing weather conditions for instance.Comment: 6 pages, 4 figures, 1 table. submited to ICC 201

    Prosumer collectives: a review

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    he authors would like to acknowledge the Smart Grid Forum for funding this research. They also acknowledge the aligned GREEN Grid research project, funded by the Ministry of Business Innovation and Employment (MBIE), with co-funding from Transpower and the Electricity Engineers’ Association. We also acknowledge our reviewers, John Hancock and Gerry Carrington.The widespread growth globally of micro-generation (particularly PV) means that consumers are interacting with electricity systems in new ways, becoming ‘energy prosumers’ – both producing and consuming energy. We define an energy prosumer as “a consumer of energy who also produces energy to provide for their needs, and who in the instance of their production exceeding their requirements, will sell, store or trade the surplus energy”. Growing prosumerism has the potential to create challenges for grid management, particularly if local generation becomes concentrated within a part of a lines network, which can particularly occur with the establishment of prosumer collectives. For this report we reviewed international and NZ articles and reports on this phenomenon, to understanding how and why consumers were adopting microgeneration, and ways in which prosumer collectives are emerging. In considering how people become prosumers, we found it useful to differentiate between ‘active prosumers’ whose decision to adopt microgeneration is self-directed and purposeful, and ‘passive prosumers’ whose entry is the result of external influences or the by-product of other decisions. The shift to becoming a prosumer creates many opportunities for people to become more actively engaged with the role of energy in their lives, which opens the door for collective engagement. We reviewed different forms of prosumer collectives in the UK, North America, Europe and Australasia. From these we identified that different models of prosumer collectives are emerging depending on whether the collective was initiated by a community or third party, and whether the microgeneration facility is on a focal site (e.g. a wind turbine cluster) or multiple sites (e.g. PV on many houses in a community). A further influence is the emergence of new business models and smart technologies that enable prosumers to manage energy production and consumption on a personal and collective level. Some businesses now offer peer-to-peer platforms that enable power-sharing within a microgrid, as well as supporting spatially dispersed collective engagement. For example, prosumers who have surplus power can sell or exchange it directly with others. We identified and named five models of collective prosumerism: multi-site community initiatives; focal-site community initiatives; multi-site third-party initiatives; focal-site third-party initiatives; and dispersed-site third-party initiatives. The common theme is that multiple non-traditional players are consciously engaging with each other in generating and sharing energy and/or the proceeds of energy generation. We identify a range of drivers, barriers and enablers to collective prosumerism. The decreasing cost of microgeneration and storage is a significant driver, along with aspirations for greater independence, control, sustainability and community cohesion. Both community and third-party developments are largely initiated by organisations that have not traditionally been part of the electricity industry. If the industry ignores or attempts to suppress this emerging interest by consumers in collective prosumerism, it may find itself becoming increasingly irrelevant in the lives of electricity users

    Building the New Babel of Transnational Literacies: Preparing Education for World Citizens

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    The transnational diasporas in a technological world that is postmodern and posthuman mean both exciting diverse communities and challenging problems. On the one hand, globalization brought human beings the convenience of exchanging ideas, doing business, and building a better world together. On the other hand, the political economy of nation states that shaped non-translational ideologies, created at the same time conflicts and misunderstandings among citizens from different parts of the world. Responding to the current transnational clashes in flow (information dissemination) and contra flow (surveillance and control of information flow) of our information age, this dissertation builds up a transnational rhetoric and communication model that can be used to examine the curriculum design, teaching materials, and pedagogy in communication and writing studies, especially in technical communication. In addition, this study investigates the present state of curriculum design, teaching materials, and pedagogies in a southeastern higher education institution. Empirical data was collected from students, instructors, and administrators from different departments of this institution to determine whether and how do curriculum design, teaching materials, and pedagogies frame and teach transnational literacy. Further, to engage the conversation with a national audience, major introductory technical communication textbooks were analyzed based on both the empirical data and the transnational rhetoric and communication model using content analysis. The findings indicate that although curriculum design, textbooks, and pedagogies have transnational components, they generally reply on traditional models and stereotypical examples that cannot meet with students’ needs in order for them to become genuine world citizens with transnational awareness and competence. The transnational rhetoric and communication model helps to fill the gaps in curriculum design, textbook revision, and pedagogies in cultivating world citizens

    Semantic discovery and reuse of business process patterns

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    Patterns currently play an important role in modern information systems (IS) development and their use has mainly been restricted to the design and implementation phases of the development lifecycle. Given the increasing significance of business modelling in IS development, patterns have the potential of providing a viable solution for promoting reusability of recurrent generalized models in the very early stages of development. As a statement of research-in-progress this paper focuses on business process patterns and proposes an initial methodological framework for the discovery and reuse of business process patterns within the IS development lifecycle. The framework borrows ideas from the domain engineering literature and proposes the use of semantics to drive both the discovery of patterns as well as their reuse

    The Playful Citizen

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    This edited volume collects current research by academics and practitioners on playful citizen participation through digital media technologies

    Keeping Up with the Virtual Joneses: The Practices, Meanings, and Consequences of Consumption in Second Life

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    Every day, thousands of people log into the virtual world of Second Life and collectively pay hundreds of thousands of dollars to purchase virtual goods. With an in-world economic system that is linked to offline economies and a wealth of user-generated content, the virtual world has a wide variety of goods available for consumption. These commodities, which include everything from clothes and cars to fantastical pets and flying airships, are computer code visually rendered on a screen, and cannot exist apart from the servers on which they are housed. Although they are virtual, goods in Second Life are widely bought, sold, and traded. Through participant observation, surveys, interviews, and content analysis, this dissertation investigates the practices, meanings, and effects associated with the consumption of virtual goods. It considers the extensive consumption practices found in the world’s market and freebie economies, the degree to which Second Life residents consume virtual goods, and their consumption preferences. It also investigates the meanings associated with these practices, and examines the ways in which consumption is implicated in individuality, belonging, resistance, social status, and social and cultural capital. Finally, it argues that although there is significant consumption inequality within the world, the effects and perceptions of this inequality are moderated by factors including the virtual nature of the world, free and inexpensive virtual goods, a lack of stigmas, user-generated content, and resident attitudes. Although consumption is a practice that bears important meanings for residents and is heavily engaged, often in unequal ways, the moderating effects of the world make Second Life what can be termed a utopia of inequality

    Beyond Money

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    What would a world without money look like? This book is a lively thought experiment that deepens our understanding of how money is the driver of political power, environmental destruction and social inequality today, arguing that it has to be abolished rather than repurposed to achieve a postcapitalist future. Grounded in historical debates about money, Anitra Nelson draws on a spectrum of political and economic thought and activism, including feminism, ecoanarchism, degrowth, permaculture, autonomism, Marxism and ecosocialism. Looking to Indigenous rights activism and the defence of commons, an international network of activists engaged in a fight for a money-free society emerges. Beyond Money shows that, by organising around post-money versions of the future, activists have a hope of creating a world that embodies their radical values and visions

    A discursive view of value co-destruction: The dieselgate case

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    The value creation based on the interaction is a core topic of the marketing discipline, in particular of Service-Dominant (S-D) logic that has prompted the conceptual shift from value as embedded in firms’ offerings to value as the phenomenological outcome of an experience created collaboratively by different actors within the service ecosystem (Lusch and Vargo, 2014). However, the definition of service, the foundational premises, and in general the lexicon utilized by S-D logic studies reveal an overoptimistic view of these processes (PlĂ© and Chumpitaz CĂĄceres, 2010). The implicit assumption is that the interaction among actors results in value co-creation, thus most of the S-D logic studies fails to consider the potential negative elements and outcomes that may emerge. The aim of this research is to analyze the dark side of value co-creation, that is the value co-destruction process (PlĂ© and Chumpitaz CĂĄceres, 2010), from the ecosystem approach. The study shows how the dark-side of co-creation affects on the market practices and how the dark-side of market practices shapes the value co-destruction in service ecosystem

    Players Unleashed! Modding The Sims and the Culture of Gaming

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    Siirretty Doriast

    The Playful Citizen

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    This edited volume collects current research by academics and practitioners on playful citizen participation through digital media technologies
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