Search results for "blockchain"
showing 10 items of 100 documents
A Novel Optimization for GPU Mining Using Overclocking and Undervolting
2022
Cryptography and associated technologies have existed for a long time. This field is advancing at a remarkable speed. Since the inception of its initial application, blockchain has come a long way. Bitcoin is a cryptocurrency based on blockchain, also known as distributed ledger technology (DLT). The most well-known cryptocurrency for everyday use is Bitcoin, which debuted in 2008. Its success ushered in a digital revolution, and it currently provides security, decentralization, and a reliable data transport and storage mechanism to various industries and companies. Governments and developing enterprises seeking a competitive edge have expressed interest in Bitcoin and other cryptocurrencie…
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…
Transparency in transactive energy at distribution level
2017
A recent report from the German Energy Agency analyzes the possible introduction of the blockchain technology in energy transactions in power distribution. The issue deserves attention since the extensive digitalization of business models puts new challenges to utilities in the power sector. The German decision makers in the energy field claim that blockchain appears as a close perspective and, at the same time, the Gartner hypecycle puts this technology at the peak of inflated expectations in 2016. Diffuse perception however provides hints for further investigation on the topic. This paper provides insight into the problem of peer-to-peer energy exchange from a technical perspective, provi…
Tail Removal Block Validation: Implementation and Analysis
2018
In this paper a solution for the removal of long tail blocktimes in a proof-of-work blockchain is proposed, implemented and analysed. Results from the mainnet of the Bismuth blockchain demonstrate that the variances in the key variables, difficulty level and blocktime, were approximately halved after the tail removal code was enabled. Low variances in difficulty and blocktimes are desirable for timely execution of transactions in the network as well as reduction of unwanted oscillations in the feedback control problem.
ICO Crowdfunding: Incentives, Pricing Strategy, Token Strategy and Crowd Involvement
2020
AbstractBlockchain technologies provide means to develop services that are secure, transparent and efficient by nature. Unsurprisingly, the emerging business opportunities has gained a lot of interest that is realized in form of successful Initial Coin Offerings (ICOs) that are able to raise billions of USD through crowdfunding campaign. In this exploratory research we study 91 ICOs through content analysis in order to investigate the special characteristics of ICO crowdfunding as business models towards the possible investors. We found that ICOs can be described through (1) the model for providing incentives for investment, (2) the pricing strategy, (3) the token strategy and (4) the activ…
Blockchain jako platforma logistyki publicznej
2020
Zarządzający sektorem publicznym coraz częściej poszukują nowych możliwości oferowania mieszkańcom większego pakietu świadczeń, przyczyniających się do podniesienia jakości życia. Jedną z ich jest logistyka publiczna, która posiada potencjał integracji i koordynacji działań w zakresie realizacji zadań publicznych. Jednak obawy sektora publicznego względem prywatnego wykonawstwa świadczeń ciągle jeszcze są stosunkowo duże. Wynika to nie tylko z braku zaufania do zewnętrznego wykonawstwa zadań, ale także z braku transparentności relacji między sektorem publicznym i prywatnym, znajdującym uzasadnienie w teorii agencji. Sposobem na poprawę relacji i optymalizację oferty w mieście może stanowić …
E-Fairs: a Cyber-Physical System for Aggregation and Economy of Scale in e-Commerce
2018
In recent years, the e-commerce arena has deeply changed because of the advent of new business models and the growing weight of huge global actors like Amazon. Some business models create competition between users, and the product price tends to rise (e.g., online auctions); other models, including group-buying, make users cooperate, and the price tends to go down. The present study extends the group-buying model and proposes a cyber-physical system called e-fair, in which both sellers and buyers are grouped to negotiate on a specific product or service. E-fairs minimize the global purchase price and the shipping resources respectively with the aggregation of demand and supply as well as or…
Podstawowe zagadnienia problematyki rekurencji treści cyfrowych
2018
Celem pracy jest wykazanie aktualnych problemów prawnych w związku z ewolucją dystrybucji treści cyfrowych oraz próbą wskazania możliwych innych kierunków zmian w podejściu do sposobu zakupu treści cyfrowej wraz z upowszechnieniem się novum w postaci rozproszonego konsensusu. Ten ostatni spowodował rozpowszechnienie się technologii łańcucha bloków, która wedle koncepcji wizjonerów ma w przyszłości pozwolić na rozproszone usługi hostingowe połączone z nowym podejściem do dystrybucji treści cyfrowych bez nośnika – zarówno dla konsumentów, jak i autorów zdigitalizowanych dzieł.
Kriptogrāfisko valūtu ietekme uz starptautisko ekonomiku
2018
Mūsdienu pasaulē jau ir aptuveni tūkstotis dažādu kriptogrāfisko valūtu, no kurām populārākā ir bitkoins. Pieprasījums pēc šīs valūtas ir pieaudzis rekordlielā ātrumā un joprojām nav nokrities līdz tādiem skaitļiem, kādi bija pašā bitkoinu sākumā. Kriptogrāfiskās valūtas piesaista lielu uzmanību un lielākā daļa cilvēku mēģina izprast, kā tās darbojās. Pastāv daudzi viedokļi par kriptogrāfiskajām valūtām: 1. Kriptogrāfiskās valūtas noteikti mainīs pasauli. 2. Kriptogrāfiskajai valūtai piemīt burbuļa efekts un tuvākajā nākotnē tā pazudīs. 3. Kriptogrāfiskās valūtas ir jauns naudas veids, kurš sniedz dažādas priekšrocības tās lietotājiem. Gandrīz visas kriptogrāfiskās valūtas darbojās ar blokķ…
On-Demand Security Framework for 5GB Vehicular Networks
2023
Building accurate Machine Learning (ML) at-tack detection models for 5G and Beyond (5GB) vehicular networks requires collaboration between Vehicle-to-Everything (V2X) nodes. However, while operating collaboratively, ensuring the ML model’s security and data privacy is challenging. To this end, this article proposes a secure and privacy-preservation on-demand framework for building attack-detection ML models for 5GB vehicular networks. The proposed framework emerged from combining 5GB technologies, namely, Federated Learning (FL), blockchain, and smart contracts to ensure fair and trustedinteractions between FL servers (edge nodes) with FL workers (vehicles). Moreover, it also provides an ef…