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Circular economies are particularly relevant in the context of digital devices or electric and electronic equipment (EEE). Many digital devices built using scarce and potentially toxic materials have a too-short life, instead of being... more
Circular economies are particularly relevant in the context of digital devices or electric and electronic equipment (EEE). Many digital devices built using scarce and potentially toxic materials have a too-short life, instead of being repaired or reused. In addition, informal recycling of electronics in the developed and developing world has emerged as a new global environmental concern. We describe the dimensions of the problem, the challenge to move to a circular economy, and the ecology for digital devices as well as how this depends on the traceability of devices and cooperation among all stake-holders locally and globally. Moreover we examine the need for support mechanisms to facilitate, standardise, and reduce the transaction cost of the processes and increase their added value. We present eReuse.org, a set of open-source tools, procedures, open data, and services organised as a common-pool resource (CPR) to reach the circular economy of electronics through promoting reuse and ensuring traceability until recycling. Further, eReuse.org envisions empowering and engaging people around the world to create local communities that bootstrap electronic reuse and to support the development of a globally recognised reuse quality and traceability standard.
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... [6] Chris Gerada, Keith J. Bradley, “Integrated PM Machine Design for an Aircraft EMA”, IEEE Transactions on Industrial Electronics, Vol55 N9, 20008 [7] JARosero, L.Romeral, J.Cusidó, A.Garcia, JAOrtega, “On the ... [10] JR Stack, TG... more
... [6] Chris Gerada, Keith J. Bradley, “Integrated PM Machine Design for an Aircraft EMA”, IEEE Transactions on Industrial Electronics, Vol55 N9, 20008 [7] JARosero, L.Romeral, J.Cusidó, A.Garcia, JAOrtega, “On the ... [10] JR Stack, TG Habetler and RG Harley, "Fault classification ...
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Page 1. Managing Democratic Grids: Architecture and Lessons Learnt Leandro Navarro Grid4All project 2006-2009 ... transparencies !! ●
but useful Page 9. Managing Democratic Grids: Architecture and Lessons Learnt Leandro Navarro Grid4All... more
Page 1. Managing Democratic Grids: Architecture and Lessons Learnt Leandro Navarro Grid4All project 2006-2009 ... transparencies !! ●
but useful Page 9. Managing Democratic Grids: Architecture and Lessons Learnt Leandro Navarro Grid4All project 2006-2009 ...
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Abstract Relationship Marketing from a Customer’s Perspective Companies need a wealth of personal data in order to address customers in a targeted manner. Utilizing IT enables them to directly address customers in order to increase... more
Abstract Relationship Marketing from a Customer’s Perspective Companies need a wealth of personal data in order to address customers in a targeted manner. Utilizing IT enables them to directly address customers in order to increase sales by improving customer retention. The use of personal data becomes problematic when customers decline the use of their data. If companies ignore their customers’
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ABSTRACT
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... 8. The Network Simulator: http://www.isi.edu/nsnam/ns/ 9. Soon.-Hyung. Yook, H. Jeong, and A.-L. Barabási. Modeling the internet's large-scale topology. Tech. Report cond-mat/0107417, Cond. Matter Archive, xxx.lanl.gov, July 2001.
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Abstract. Epidemic algorithms can propagate information in a large scale network, that changes arbitrarily, in a self-organizing way. This type of spreading process allows rapid dissemination of information to all network nodes. However,... more
Abstract. Epidemic algorithms can propagate information in a large scale network, that changes arbitrarily, in a self-organizing way. This type of spreading process allows rapid dissemination of information to all network nodes. However, the dynamics of epidemic algorithms can be ...
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How can we make citizens’ rights effective in the information society? Without a doubt, the answer is: with a wider and more direct participation by citizens. However, the development of the information society is dominated by a... more
How can we make citizens’ rights effective in the information society? Without a doubt, the answer is: with a wider and more direct participation by citizens. However, the development of the information society is dominated by a commercial and technical perspective that tends to be emphasised to the detriment of other perspectives that are much more important but more difficult to measure. These include: the definition of the rules of the game and the “social contract” (e.g. legal framework), as well as indicators of indirect impact such as production of and access to knowledge, changes in social relations and participation. Postprint (published version)
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Esta asignatura trata de la problemática, organización y aplicación de los sistemas distribuidos. Las aplicaciones distribuidas son sistemas formados por algunos, varios o muchos ordenadores interconectados en una red y con procesos que... more
Esta asignatura trata de la problemática, organización y aplicación de los sistemas distribuidos. Las aplicaciones distribuidas son sistemas formados por algunos, varios o muchos ordenadores interconectados en una red y con procesos que interaccionan entre sí de una manera compleja, compartiendo recursos y servicios.
ABSTRACT Community Clouds, usually built upon community networks, operate in a more disperse environment compared to a data center Cloud, with lower capacity and less reliable servers separated by a more heterogeneous and less predictable... more
ABSTRACT Community Clouds, usually built upon community networks, operate in a more disperse environment compared to a data center Cloud, with lower capacity and less reliable servers separated by a more heterogeneous and less predictable network interconnection. These differences raise challenges when deploying Cloud applications in a community Cloud. Open Stack Swift is an open source distributed storage system, which provides stand alone highly available and scalable storage from Open Stack Cloud computing components. Swift is initially designed as a backend storage system operating in a data center Cloud environment. In this work, we illustrate the performance and sensitivity of Open Stack Swift in a typical community Cloud setup. The evaluation of Swift is conducted in a simulated environment, using the most essential environment parameters that distinguish a community Cloud environment from a data center Cloud environment.
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Nowadays cooperative web caching has shown to improve the performance in Web document access. That is why the interest in works related to web caching architectures designs has been increasing. This paper discusses and compares... more
Nowadays cooperative web caching has shown to improve the performance in Web document access. That is why the interest in works related to web caching architectures designs has been increasing. This paper discusses and compares performances of some cooperative web caching designs (hierarchy, mesh, hybrid) using different document validation/replication methods (TTL, invalidation, pushing, etc). It is shown how the performance
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We introduce in this work Object Distribution System, a distributed system based on distribution models used in everyday life (e.g. food distribution chains, newspapers, etc.). This system i s designed to scale c orrectly in a wide a rea... more
We introduce in this work Object Distribution System, a distributed system based on distribution models used in everyday life (e.g. food distribution chains, newspapers, etc.). This system i s designed to scale c orrectly in a wide a rea network, u sing weak consistency replication mechanisms. It is formed by two independent virtual networks on top of Internet, one for
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This paper presents an Object Distribution System (ODS), a distributed system inspired by the ultra-large scale distribution models used in everyday life (e.g. food or newspapers distribution chains). Beyond traditional m echanisms of... more
This paper presents an Object Distribution System (ODS), a distributed system inspired by the ultra-large scale distribution models used in everyday life (e.g. food or newspapers distribution chains). Beyond traditional m echanisms of approaching information to readers (e.g. caching and mirroring), this s ystem enables the publication, classification and subscription to volumes of objects (e.g. documents, events). Authors submit their
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ABSTRACT Community-Lab is an open, distributed infrastructure for researchers to experiment with Community Networks, that are large scale, self-organized and decentralized networks and services built and operated by citizens for citizens.... more
ABSTRACT Community-Lab is an open, distributed infrastructure for researchers to experiment with Community Networks, that are large scale, self-organized and decentralized networks and services built and operated by citizens for citizens. The goal of Community-Lab is to advance research and empower society by understanding and removing obstacles for these networks and services. This article outlines Community-Lab's aim, development, characteristics and infrastructure. This demonstration presents its current status of development and deployment, a sample decentralized experiment, and an invitation to the broader large-scale distributed computing research community to participate in the project through an open call.
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ABSTRACT Wireless Community Networks have received increasing attention the latest years. In an effort to set the cornerstone for an internet without central authorities and monopolies, network engineers throughout the world have started... more
ABSTRACT Wireless Community Networks have received increasing attention the latest years. In an effort to set the cornerstone for an internet without central authorities and monopolies, network engineers throughout the world have started creating community networks. To enhance this effort, Community-lab, a wireless community networks testbed, was created which allows researchers to experiment with new protocols and applications in a realistic environment. Nevertheless, this testbed does not offer the ability to perform L2 experiments. To address this gap, we developed a platform that allows Community-Lab researchers to perform L2 experiments. Moreover, we decided to reach our goal using Software Defined Networking(SDN) techniques, due to the attention they received lately and their promise for a complete networking solution. Overall, we propose an architecture that allows researchers to perform L2 experiments in a generic community networks testbed. To prove the feasibility of our architecture we implemented it for Community-Lab using the OpenFlow SDN protocol, enabling researchers to manage their L2 topology of their experiment.