Search results for "Peer-to-peer"
showing 10 items of 54 documents
An Energy Blockchain, a Use Case on Tendermint
2018
The recent advances in distributed energy systems require new models for exchanging energy among prosumers in microgrids. The blockchain technology promises to solve the digital issues related to distributed systems without a trusted authority and to allow quick and secure energy transactions, which are verified and cryptographically protected. Transactions are approved and subsequently recorded on all the machines participating in the blockchain. This work demonstrates how users, which are nodes of the energy and digital networks, exchange energy supported by a customized blockchain based on Tendermint. We focus on the procedures for generating blocks and defining data structures for stori…
A Peer-to-Peer Market Algorithm for a Blockchain Platform
2020
In an era of technological revolution in which everything becomes smarter and connected, the blockchain can introduce a new model for energy transactions able to grant more simplicity, security and transparency for end-users. The blockchain technology is characterized by a distributed architecture without a trusted and centralized authority, and, therefore, it appears as the perfect solutions for managing exchanges between peers. In this paper, a market algorithm that can be easily transferred to a smart contract for maximizing the match between produced and consumed energy in a micro-grid is presented. The algorithm supports energy transactions between peers (both producers and consumers) …
Improving Chord Lookup Protocol for P2PSIP-Based Communication Systems
2009
Chord has been suggested as mandatory overlay technology in the future P2PSIP-based communication systems. Chord allows for the available peer/resource lookup in no more than hops, where N is the total number of the peers in the overlay network. However, as a protocol originally designed for background downloading applications, Chord has a few drawbacks when supporting P2PSIP real-time communication systems. These drawbacks are related to ID assignment, the relation between ID and physical location, the routing styles and lack of cache, etc. In this paper, we investigate several approaches that can improve the efficiency of the peer/resource lookup algorithm. After that, we simulate two sys…
Trust-based framework for security enhancement of P2PSIP communication systems
2009
Today, Peer-to-Peer SIP based communication systems have attracted much attention from both academia and industry. The decentralized nature of P2P might provide the distributed peer-to-peer communication system without help of the traditional SIP server. However, it comes to the cost of reduced trustworthiness and may cause security problems, e.g. privacy leaks, unpredictable availability, etc. In this paper, we investigate on P2PSIP security issues and propose a subjective based trust model that offers trust services during P2PSIP session establishment. The main issues considered in this model include opinion calculation, opinion maintenance, data confidentiality and integrity, message rou…
Digital rights management : blockchain and digital music content management
2017
Tämän tutkielman tarkoituksena oli ymmärtää lohkoketjuteknologian vaikutuksia digitaalisen musiikin sisällönhallintaan hyödyntäen digitaalisten tekijänoikeuden hallintajärjestelmien (DRM) viitekehystä. Tutkielma sisälsi kolme tutkimuskysymystä: mitä digitaalisia tekijänoikeuden hallintajärjestelmien haasteita lohkoketjuteknologia voisi mahdollisesti ratkaista verrattuna edellisiin DRM-teknologioihin, miten lohkoketjuteknologia liittyy DRM:n aiempiin teknologisiin haasteisiin ja mitkä ovat lohkoketjuteknologian mahdolliset vaikutukset digitaalisen musiikin tekijänoikeuden hallintajärjestelmiin. Vastaukset tutkimuskysymyksiin perustuivat kirjallisuuskatsaukseen sekä puolistrukturoituihin teem…
Pioneers as Peers : How Entrepreneurial Journalists Imagine the Futures of Journalism
2021
The article investigates the futures of journalism that pioneering entrepreneurial journalists anticipate. This comprises the different imaginaries that journalists employ to make sense of journalism’s present potentials, anticipate its possible futures, and inform their decision-making. By analysing semi-structured interviews with Finnish entrepreneurial journalists, the article identifies a peer-to-peer imaginary on which the interviewees draw and construct to anticipate the potential futures of journalism. In this peer-to-peer imaginary, journalism is produced in journalists’ and audiences’ peer networks of affinity and shared interests. The imaginary promises elevated audience engagemen…
Exploring problems associated with the sharing economy
2018
As the sharing economy has become more popular, its problems are discussed increasingly. However, these discussions are often confusing because there are multiple definitions for the sharing economy, and the discourse does not usually specify which definition it is based on. Therefore, the actors may be wrongfully accused of problems that do not concern them, only because they are perceived as belonging to the sharing economy. We aim to clarify this discussion by creating a framework that maps specific problem discourses to specific actors and stakeholder groups. We create a framework based on a review of the academic literature in which the sharing economy is delineated into smaller market…
IPMWORKS, a European network of pionneer farmers engaged to demonstrate cost-effective IPM-based strategies with low pesticide use
2022
Integrated Pest Management (IPM) is based on a diversity of pest management measures(prevention, non-chemical control, best practices for optimizing pesticide efficiency, etc.).These are combined at the farm level to enable reduced reliance on pesticides, and thereforea decrease in the exposure of the environment and people to pesticides. Rare pioneer farmersthroughout Europe are testing such IPM strategies and are succeeding in achieving goodoutcomes with low pesticide inputs. However the majority of European farmers still relyheavily on pesticides, with major environmental and societal impacts, because most of themhave not adopted a comprehensive, farm-level and holistic IPM strategy so f…
Development of Emotional Skills in Adolescents to Prevent Cyberbullying and Improve Subjective Well-Being
2018
Bullying behavior alters the way in which students coexist together in the classroom and negatively affects adolescents’ well-being. Research highlights the importance of emotional skills in promoting positive youth development and optimal social functioning. Therefore, education in these skills is a potential target for interventions aimed at reducing cyberbullying and promoting satisfaction with life during adolescence. This study analyzes the impact of an emotion education program in adolescents to promote classroom coexistence and well-being. The sample comprised 148 students from 7th and 8th grade of secondary school aged between 12 and 15 years (Mage = 12.63, SDage = 0.74; 57% girls).…
Millennials, Peer-to-Peer Accommodation and the Hotel Industry
2016
Today’s world market is a buyer’s market and the new customers, the millennials, are thoughtto be distinctively different than others. Technologically comfortable, the most educated generationever, multitaskers, and strongly influenced by friends and peers, millennials have a different buyingbehaviour and other expectations from service providers. Thus, companies from the hospitalityindustry and policy makers face a number of challenges in trying to meet their (future) demands. Atthe same time, the “sharing economy” has led to the rise of the peer-to-peer accommodation sectorand to a new business model (Airbnb). The aim of this paper is to present these challenges for the hotel industry, be…