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51,074 results · page 1942 of 2,129
Min Luo, Vasileios E. Kontosakos, Athanasios A. Pantelous, Jian Zhou
No abstract is available for this record.
Peder Østbye
No abstract is available for this record.
Veskus, Karl
Käesolevas bakalaureusetöös tutvustatakse plokiahela tehnoloogiat ning selle kahte erinevat platvormi, Ethereum ja Hyperledger Fabric, mis on loodud väga erinevate rakenduste loomiseks kasutades just plokiahela tehnoloogiat. Peale selle luuakse mõlemat platvormi kasutades sarnane rakendus, millele järgneb võrdlus. Esiteks, annab võrdlus lugejale ülevaate, kuidas antud platvormid üksteisest arhitektuuri ning kasutajamugavuse poolest erinevad. Teiseks näitab, kuidas erineb nende platvormide abil rakenduste loomine ning mille poolest erinevad lõputöö raames loodud rakendused.
Ιωάννης Μιχαήλ, Ioannis Michail
Throughout the history of mankind, trusted relationships have played a vital part in every \ntransaction humans have made. Those transactions belong to a spectrum that starts from \neveryday life decisions and acts, to a more complex, sensitive and wide area that even nations \nare involved. \nBefore the era of globalization of telecommunications that we live in, achieving trust was \nmore related to human relations. Even though that the meaning of trust is known to all, it is \nhard to find a definition that strictly describes it. \nTrust is multidimensional, multidisciplinary and multifaceted concept. Many definitions can \nbe found in literature and are related to notions as goodness, strength, reliability, integrity, \nability or character of a person or thing. A trust relationship involves two parties, a trustor \nand a trustee. The trustor is the person that holds confidence, belief on the reliability of \nanother person or thing which is the other party, the trustee. (Zheng & Valtteri Niemi, \nTowards User Driven Trust Modeling and Management, 2009) \nHow though trust is established in modern computer networks, where the notions of the \ntrustor and trustee are not represented by strictly humans, but from entities that might never \nhave had a relationship upon the trust can be build. \nIn this project we will study the achievement of trust in traditional kinds of networks such as \nad-hoc, mobile and wireless and we will examine the ability to elevate the trust level in a \ncomputer network using the under development and mostly promising blockchain network. \nThe network is going to be setup as a private blockchain network, where all the nodes that \nconsist it, will be pre-set from an administrative team. The computers that will participate will \nhave all the requirements in order to connect to the private network running as services on \nboot. \nThe application will run on each node and on starting the application the very first check will \nbe to start the node and connect to the network. Only if the network has been found and the \nnode is connected to it, the application proceeds with checking the presence of web3js and \nonly after successfully checking the communication of the web3js with the network, the user \nis prompt with the login page. \nThe authorization of the user is checked upon a smart contract on the blockchain network \nand after a successfully prompt from the smart contract, the credentials are checked, in our \ncase, on a fake backend where a JWT token is issued to the user in order to use the application \ndepending on the role that he has.
Jamil Civitarese
Metcalfe's Law argues the value of a network is proportional to the square of its users. Bitcoin and other cryptocurrencies can be modeled as such: if Metcalfe's Law is true, then it is possible to forecast prices using the size of the network. I test this assertion by a cointegration test between price and an adjusted number of wallets' connections. It is stated that the series do not cointegrate, rejecting the Metcalfe's Law. A first-differences model is employed to further analyse the relation between returns and variations in the number of wallets. It is stated that Metcalfe's Law consistently predicts the trend in the value of Bitcoin; nevertheless, it is not possible to reject the reverse causation of Bitcoin returns leading to new wallets.
Margaret Ryznar
Bitcoin emerged as a cryptocurrency relying on new blockchain technology in 2009, but how to regulate it was not immediately clear. The recent emergence of bitcoin futures poses a new level of risk to the economy, again raising questions of regulation. This is the first law review article to examine the potential regulatory regime for bitcoin futures.
Sungwook Kim
Since the introduction of Bitcoin in 2009, it has gained a significant popularity around the world. Bitcoin is a peer-to-peer electronic payment system where payment transactions are stored in a data structure named the block-chain. Based on a fully decentralized network, the blockchain is maintained by a community of participants. In Bitcoin system, mining is the fundamental concept. In this paper, we design a new Bitcoin mining scheme based on the multi-leader multi-follower Stackelberg game model. To effectively implement the peer-to-peer relationship of Bitcoin system agents, we assume that mining pool operators are leaders and mining participating users are followers in our Stackelberg game. By using the dynamics of feedback-based repeated process, leaders, and followers can be interacting with one another and make their decisions in a way to reach an efficient system solution. Without the influence of any central authorities and organizations, the proposed method is practically applied to a distributed Bitcoin system. Through system level simulations, we show that our game approach outperforms the existing Bitcoin schemes in providing a better fair-efficient system performance.
Marlene Gröblacher
As the exchange and trade with cryptocurrencies is steadily rising, consequently, they become subject to financial reporting.The essence of financial reporting derives from the objective to provide stakeholders of an enterprise with sustainable information about the financial well-being of the business.Accountants might face complications meeting the objective of financial reporting considering cryptocurrencies such as Bitcoins due to the absence of guidelines in both, IFRS and US GAAP.In the first part, this paper applies the existing IAS and IFRS guidelines to this practical issue and contributes to the process by which diversification in practice can be avoided.Broadly speaking, the problem can be addressed by classifying Bitcoins as intangible assets.Whereas, Bitcoins fail the definition of cash, cash equivalents, financial instruments, as well as the definition of inventory.In the second part, a discussion concerning non-financial reporting of Bitcoins can be found.
Takahiro Hattori, Ryo Ishida
No abstract is available for this record.
Panagiotis Delimatsis
No abstract is available for this record.
Chris Berg, Sinclair Davidson, Jason Potts
No abstract is available for this record.
Yang Li, Thierry Marier-Bienvenue, Alexis Perron-Brault, Xinyi Wang · 5 authors
The scientific literature on blockchain technology is emerging but increasing rapidly. This review paper aims to provide a deeper understanding of the nature and scope of the extant literature on blockchain technology in the particular context of business organizations. To achieve our main objective, we searched five databases and screened 320 papers for inclusion. As a result of the search and screen process, we identified 39 relevant articles. Data coding was first pilot tested and then performed independently by two teams of researchers. All disagreements were reconciled by a third coder. Our findings reveal that most of the extant literature focuses on "how" blockchain technology works and, to a lesser extent, on the "what", i.e. its potential applications and usages in business organizations. For its part, the "why" question, which focuses on the organizational motivations for adopting blockchain technology, was scarcely discussed in prior literature. In short, our findings reveal that many issues and questions remain to be investigated. Based on a gap analysis, we propose a few promising avenues that shall guide future research efforts in this important topic.
Bastien Buchwalter
No abstract is available for this record.
Zaman Zaini, Ahmad Hidayat
Formation of new autonomous regions are meant to promote effective governance, by reducing the span of control of the previous more extensive area, improving the quality of public services, increasing the wealth of the local people, setting the fiscal balance between central and local government, increasing employment and capital inflow. However, the formation process of North MusiRawas as a new autonomous region took 11 years since proposed in 2002 until signed by the central government in 2013. This paper argues that the factors behind the long delay were mainly political factors, instead of administrative. Administrate, the region is eligible to be established as a new autonomous region. This study uses the NVivo Program as a tool for conducting primary and secondary data analyzed from direct interviews, meeting results and statements from related parties. From the research results obtained that the political process, however, involves a series of events in its history that generated constraints for establishing North MusiRawas as a new autonomous region. The historical facts include leadership contest between Governor of South Sumatera and Regent of MusiRawas, conflict over control of the natural gas resource in Suban 4, central government's moratorium policy to new autonomous region formation, leadership change, and internal conflict within the social movement to demand autonomy among local people. It argued in this paper that absence of political network and lack of organization of social mobility to demand freedom allows the recurring events that created constraints to the political process of establishing North MusiRawas as a new regency. The absence of political network to elites in the regional and national levels complicate the political communication to pursue autonomy. It explains why the conflict between Governor and Regent can halt the proposal. Weak organization of social movement allowed internal strife and complicated the resource mobilization to achieve the political goal.
Deane E. Jill
A useful blockchain should possess the following properties, one or more of which many existing blockchain systems lack: 1) A sound consensus protocol. 2) An efficient transaction-processing system. 3) Immutability of history. 4) Decentralization. 5) An effective avenue for hard-forks and rule changes. We propose a system named the “Verex Blockchain” that will fulfill these requirements. This system employs an “Assigned-Majority-Validation” consensus protocol whereby only nodes within a specialized, designated network may vote on the correct state of the blockchain and add new blocks of transactions without proof of work or stake. New nodes to this network must be approved by existing nodes. These nodes will be controlled by entities with high public visibility such as governments or multinational technology companies, whose identities and actions will be made fully transparent on the blockchain. Transactions will be charged fees in cryptocurrency according to a fixed and known fee schedule, which will be earned by nodes in the designated network. Any user in the world may download the blockchain, receive and verify updates, and submit transactions, but only nodes in the specialized network may write updates to the blockchain.
Riya Jimmy, S Gokul, J. Jayashankar
Thefnancial frauds are increasing at an alarming rate. The stake holders have lost a huge amount of money through these fnancial frauds. India is no way different. Even though it has a huge potential to grow the increasing fnancial frauds and white-collar crimes are a hindrance to it. To put an end to it we require a tool called forensic accounting. Forensic accounting is an integration of accounting, auditing and investigation. They keep on looking at the possibility of exposing frauds. They are meant for identifying the transactions which are not authentic and gathering evidence against the same which can be provided as a proof in the court of law. Forensic accounting is at an infant stage. And through our study we would like through analyse the extent to which forensic accounting act as a detection tool in reducing white collar crimes. And this study would throw light on the stakeholders who are still unaware of this concept and thus their chance of getting cheated become reduced. And there by a reduction in fnancial frauds and white-collar crimes.
Daniel Gama e Colombo, Jorge Martínez-Vázquez
This paper examines the impact of fiscal decentralization on both public investment in innovation (measured as the share of research and development - R&D - spending in total government budget) and on the intensity of basic research within the public R&D bundle. We present a theoretical model where a ‘benevolent government’ invests in R&D aiming at maximizing net income available in the country (central government) or in the respective region (subnational government), where states compete to attract capital investment, and where R&D results are subject to interregional knowledge spillovers. The model predicts that decentralization leads to a lower level of public spending on innovation and to a lower share of basic research in government R&D budgets. The implications of the model are empirically tested utilizing country aggregate data. We find evidence that expenditure decentralization leads to lower intensity of basic research within public R&D and that both revenue and expenditure decentralization negatively affect the size of innovation spending. The findings suggest that fiscal decentralization policy, expected to be beneficial in many other dimensions, should be accompanied by measures to compensate for the otherwise decrease in innovation spending and that the assignment of expenditure responsibilities should have central government play a greater role in financing and carrying out basic research.
Henny Gabert, Henrik Grönlund
Blockchain technology with its distributed ledgers attracts massive attention today and creates interest in many different industries. One of the most promising areas for implementation of blockchain technology is its use to create fully automated and decentralized contract solutions, so-called smart contracts. The blockchain technology is also expected to develop the concept of BIM by facilitating the creation of a common model. The problem addressed in this study is the limited amount of research carried out in the blockchain field and the potential use of smart contracts in procurement of services in the construction industry. The construction industry differs from many other industries as it is project-based with changing circumstances and conditions. The study shows that the construction industry is an industry focused on discussions and disputes, the majority of which are linked to payments and contractual interpretations. Two of the key concepts of the study are therefore moral hazard and opportunistic behavior. Opportunistic behavior can affect norms, the willingness for cooperation and the degree to which parties trust each other. Designing contracts to reduce the risk of moral hazard and opportunistic behavior is therefore an important aspect. The study has chosen to study both relationships that are hierarchical to nature but also peer-to-peer. The purpose of the study has been to conceptually reflect on percived opportunities and challenges with blockchains in the construction industry regarding two identified applications, smart contracts and BIM. To investigate this, a qualitative interview study has been conducted. The study points to the need for a more standardized building process that is subject to a certain degree of repetition to achieve successful use of a blockchain network and smart contracts. The study also shows that there is a positive attitude from the respondents regarding a possible development for several of the potential applications of blockchain technology. Blockchain technology and smart contracts have the potential to improve the reliability and credibility of logbooks, self-checks and work performed within a building project. Furthermore, the study highlights the importance of long-term relationships and confidence in reducing opportunistic behavior. Based on previous research and empirical analysis, the study contributes to an increased understanding of which levels in the construction industry smart contracts may be applicable. The study shows that smart contracts are not perceived suitable for complex contracts where the work to be performed can be changed many times during the contract period. The study, on the other hand, indicates that blockchain development with BIM is not demanded at the present time. Finally, the study points out that blockchain technology is perceived to have the potential to make the building process more transparent and open with reduced power conditions at the same time as it gets less centralized which opens up the need for research in that direction.
Habil Kantur
The world is becoming more and more digitized. Recently many industries have started to research the blockchain technology and particularly smart contracts. One industry that so far has not adopted new technology in the same pace as other industries, is the insurance industry so this interview study aims at finding opportunities and challenges for insurance companies that want to learn about smart contracts and its use cases.By doing a literature review and performing interviews with blockchain experts and insurance company employees, this study found that both IT companies working with smart contracts and the insurance companies have limited knowledge of the legal aspect of smart contracts. The lack of standards and regulations allows IT companies to freely create smart contracts without much quality control. The insurance companies must innovate themselves in order to not be disrupted. The blockchain technology will offer many new insurance types and if the insurance industry fails to adopt the blockchain technology they may face market disruption.There is much room for future research following this study. It would be beneficial to research how contract theory could be used in practice during the creation of legally binding smart contracts. Furthermore, research around fraud prevention in smart contracts would be interesting as would an in-depth exploration of the ecosystem of third party software and services around smart contracts.
Matthijs Berkhout, Fons van den Brink, Mart van Zwienen, Paul van Vulpen · 5 authors
No abstract is available for this record.
Susan Alkadri
Digitalization makes almost everything quicker, sleeker, and more efficient. Many argue cryptocurrency is the future of money and payment transfers. This paper explores how the unique nature of cryptocurrencies creates barriers to a strict application of traditional regulatory strategies. Indeed, state and federal regulators remain uncertain if and how they can regulate this cutting-edge technology. Cryptocurrency businesses face difficulty navigating the unclear regulatory landscape, and consumers frequently fall prey to misinformation. To reconcile these concerns, this paper asserts cryptocurrency functions as “currency” or “money” and should be treated as such for regulatory purposes. It also proposes each state implement a uniform cryptocurrency-specific framework following the Uniform Regulation of Virtual-Currency Business Act. Such a harmonious approach would reduce compliance costs for cryptocurrency businesses, protect consumers, and provide satisfactory state and federal oversight.
Doc. Aleksandar Arsov
No abstract is available for this record.
André Caldegren
Cryptocurrencies are a cryptography based technology, that has increased massively in popularity in recent years. These currencies are traded on markets that specialize in cryptocurrency trade. There, you can trade one cryptocurrency for another, or buy one with real world money. These markets are quite volatile, meaning that the price of most cryptocurrencies swing up and down a lot. The largest cryptocurrency is Bitcoin, but there is also more than 1500 smaller ones, that goes by the name alternative coins, or altcoins. This thesis will try to find out if it is possible to make accurate predictions about the future price of the altcoin Ethereum, and also see if Bitcoin may have some influence over the price of the selected altcoin. The predictions were made with the use of an artificial neural network, an LSTM network, that was trained on labeled data from 2017. The predictions were then made in intervals of one hour ahead, six hours ahead, and one day ahead through early 2018. The predictions showed that it is possible to make somewhat accurate predictions about the future. The predictions that were made one hour ahead were more accurate than both the six hours ahead predictions and the full day ahead predictions. By comparing the loss rates of the neural networks that were only trained on Ethereum, with the loss rates of the networks that trained on both Bitcoin and Ethereum, is was made clear that training on both cryptocurrencies did not improve the prediction accuracies.
Kombe Kaponda
No abstract is available for this record.