184,397 research outputs found
Self-organizing distributed digital library supporting audio-video
The StreamOnTheFly network combines peer-to-peer networking and open-archive principles for community radio channels and TV stations in Europe. StreamOnTheFly demonstrates new methods of archive management and personalization technologies for both audio and video. It also provides a collaboration platform for community purposes that suits the flexible activity patterns of these kinds of broadcaster communities
Experimental evaluation results of an advanced DHT-based peer-to-peer system
P-Grid is a decentralized DHT-based peer-to-peer system with logarithmic search complexity. As it is intended to provide a platform for distributed information management beyond mere file-sharing it supports an update functionality with lazy consistency guarantees, identity management disentangling the DHT from the underlying networking infrastructure, and decentralized load balancing. In this paper we first give a brief overview of the theoretical foundations of P-Grid and the supporting functionalities. Then we highlight some interesting implementation details and present briefly some experimental evaluation results. To our knowledge this is one of the first reports on experimental evaluation results of a structured peer-to-peer system in a real-world networking environment
Building Stronger Nonprofits Through Better Financial Management
The Wallace Foundation's four-year Strengthening Financial Management in Out-of-School Time initiative(SFM) was designed to improve the financial management systems of 26 well-respected Chicago nonprofits that provide out-of-school-time (OST) services. SFM grew out of the Foundation's longstanding commitment to improving the quality of services for youth during nonschool hours and the realization that even successful nonprofits face financial management challenges that have an impact on their ability to achieve their missions. To address these challenges, the initiative is working to reform public and private funding practices that strain OST organizations' financial management capacity and providing participating organizations with financial management training and peer networking opportunities (using one of two models that vary in intensity and in the balance of individual vs. group-based training and support)
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SiFo-Peers: A Social FOAF Based Peer-to-Peer Network
In this paper, an attempt is made to conceptually unite three different application areas for semantic technologies, namely personal Knowledge Management, social networking, and Peer-to-Peer information-sharing. Until now, semantic technology has been applied to each of these application areas separately or in binary combinations only. By functionally combining all three areas in a single application, it is hoped to sketch a compelling Semantic Web system that will help increase the spread and acceptance of the Semantic Web vision. A concrete usage scenario of a community of researchers is used to demonstrate the approach
Peer-mentors reflect on the benefits of mentoring: An autoethography
Many PhD candidates bring with them a wealth of knowledge and skills; however, these may not sufficiently prepare candidates to work with high autonomy on a project with often limited interaction with the wider research community. A peer-mentor program model, in which a mentor delivers dyadic and group support to higher degree by research students from different disciplines and backgrounds, has the potential to enhance candidates’ knowledge and skills. However, the mentors themselves can experience significant advantages, as peer-mentoring can also have a positive effect on the mentors’ research experience. In order to further understanding of the potential benefits of peer-mentoring for mentors, three researchers explore their experiences as peer-mentors through an autoethnographic framework. Through discussing their personal experiences as peer-mentors, the researchers identified a range of benefits for themselves. These benefits in-volved finding that peer- mentoring enhanced their own learning, fostered reflective practice, and provided current tertiary teaching and research support experience. Peer mentoring also gave them broad exposure to a breadth of disciplines, theories, and methods; provided project management insights; created opportunities for professional networking; supported their social needs; and gave them invaluable insight into other candidate/supervisor relationships. Their role in a peer-mentor model has shaped their experiences as PhD candidates and also informed their decisions after graduation
A Taxonomy of Data Grids for Distributed Data Sharing, Management and Processing
Data Grids have been adopted as the platform for scientific communities that
need to share, access, transport, process and manage large data collections
distributed worldwide. They combine high-end computing technologies with
high-performance networking and wide-area storage management techniques. In
this paper, we discuss the key concepts behind Data Grids and compare them with
other data sharing and distribution paradigms such as content delivery
networks, peer-to-peer networks and distributed databases. We then provide
comprehensive taxonomies that cover various aspects of architecture, data
transportation, data replication and resource allocation and scheduling.
Finally, we map the proposed taxonomy to various Data Grid systems not only to
validate the taxonomy but also to identify areas for future exploration.
Through this taxonomy, we aim to categorise existing systems to better
understand their goals and their methodology. This would help evaluate their
applicability for solving similar problems. This taxonomy also provides a "gap
analysis" of this area through which researchers can potentially identify new
issues for investigation. Finally, we hope that the proposed taxonomy and
mapping also helps to provide an easy way for new practitioners to understand
this complex area of research.Comment: 46 pages, 16 figures, Technical Repor
Smart Grid Management using Blockchain: Future Scenarios and Challenges
Decentralized management and coordination of energy systems are emerging
trends facilitated by the uptake of the Internet of Things and Blockchain
offering new opportunities for more secure, resilient, and efficient energy
distribution. Even though the use of distributed ledger technology in the
energy domain is promising, the development of decentralized smart grid
management solutions is in the early stages. In this paper, we define a layered
architecture of a blockchain-based smart grid management platform featuring
energy data metering and tamper-proof registration, business enforcement via
smart contracts, and Oracle-based integration of high computational services
supporting the implementation of future grid management scenarios. Three such
scenarios are discussed from the perspective of their implementation using the
proposed blockchain platform and associated challenges: peer to peer energy
trading, decentralized management, and aggregation of energy flexibility and
operation of community oriented Virtual Power Plants.Comment: Accepted and presented at: 19th RoEduNet Conference: Networking in
Education and Research, December 11-12, 202
When social links are network links: The dawn of peer-to-peer social networks and its implications for privacy
International audienceDespite the success they enjoy among Internet users today, social networking tools are currently subject to several controversies, notably concerning the uses their administrators make of users' private data. Today, many projects and applications propose decentralised alternatives to such services, among which one of the most promising appears to be the construction of the social network on a peer-to-peer (P2P) architecture. This paper addresses and analyses the "first steps" of applications at the crossroads between social networks and P2P networks. More specifically, it discusses how such applications anticipate modifications in the management of users' right to privacy, by harnessing both anonymity and knowledge of identity - aspects generally identified with P2P networks and social networks, respectively - depending on the different functionalities and layers of the application
D-SAR: A Distributed Scheduling Algorithm for Real-time, Closed-Loop Control in Industrial Wireless Sensor and Actuator Networks
Current wireless standards and protocols for industrial applications such as WirelessHART and ISA100.11a typically use centralized network management techniques for communication scheduling and route establishment. However, large-scale centralized systems can have several drawbacks. They have difficulty in coping with disturbances or changes within the network in real-time. Large-scale centralized systems can also have highly variable latencies thus making them unsuitable for closed-loop control applications. To address these problems, this paper describes D-SAR, a distributed resource reservation algorithm which would allow source nodes to meet the Quality-of-Service (QoS) requirements of the application in real-time, when carrying out peer-to-peer communication. The presented solution uses concepts derived from relevant networking-related domains such as circuit switching and Asynchronous Transfer Mode (ATM) networks and applies them to wireless sensor and actuator networks
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