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Modeling Coordinated vs. P2P Mining: An Analysis of Inefficiency and Inequality in Proof-of-Work Blockchains [article]

Mohamed Alzayat
2021 arXiv   pre-print
In this paper, we propose a simple model of a proof-of-work blockchain with latencies for both the P2P and the coordinated settings.  ...  We study efficiency in a proof-of-work blockchain with non-zero latencies, focusing in particular on the (inequality in) individual miners' efficiencies.  ...  This work has also been partially supported by MIAI @ Grenoble Alpes (ANR-19-P3IA-0003) and by the French National Research Agency through grant ANR-20-CE23-0007.  ... 
arXiv:2106.02970v1 fatcat:ckthuzh54neltnyadrqx52xrfe

SBTMS: Scalable Blockchain Trust Management System for VANET

Fatemeh Ghovanlooy Ghajar, Javad Salimi Sratakhti, Axel Sikora
2021 Applied Sciences  
Vehicles check the validity of the received messages using the proposed Bayesian formula for trust management system and some information saved in the Blockchain.  ...  Our experimental results show that the proposed system is effective, scalable and dependable in data gathering, computing, organization, and retrieval of trust values in VANET.  ...  Examples of proof options include proof of work, stocks proof, proof of capacity, proof of space, proof of elapsed time, proof of burning, proof of activity, proof of power,  ... 
doi:10.3390/app112411947 fatcat:baqj3no56zgaxedqjzvyr3rvya

A Survey of State-of-the-Art on Blockchains: Theories, Modelings, and Tools [article]

Huawei Huang, Wei Kong, Sicong Zhou, Zibin Zheng, Song Guo
2020 arXiv   pre-print
We wish this survey can serve as a useful guideline for researchers, engineers, and educators about the cutting-edge development of blockchains in the perspectives of theories, modelings, and tools.  ...  of blockchain systems and networks.  ...  In Monoxide proposed by [73] , the authors have devised a novel proof-of-work scheme, named Chu-ko-nu mining.  ... 
arXiv:2007.03520v2 fatcat:3lvd5dhkajdhbcwlh6vtdl7nlq

Toward a Formal Scholarly Understanding of Blockchain-Mediated Decentralization: A Systematic Review and a Framework

Michał R. Hoffman, Luis-Daniel Ibáñez, Elena Simperl
2020 Frontiers in Blockchain  
Blockchain-mediated decentralization appears to have unique characteristics reflecting an idiosyncratic set of authority-related values prevalent in so-called "crypto" online communities.  ...  This work analyses blockchain-mediated decentralization based on a systematic review of the scholarly understanding of the term 'decentralization' across multiple disciplines from computer to political  ...  ACKNOWLEDGMENTS We want to thank the reviewers and the editor for their valuable contributions.  ... 
doi:10.3389/fbloc.2020.00035 fatcat:qmal2chgn5a4xeopw33ddk42pe

Block-by-Block: Leveraging the Power of Blockchain Technology to Build Trust and Promote Cyber Peace

Scott Shackelford, Steven Myers
2016 Social Science Research Network  
This Article seeks to address this omission by analyzing the potential impact of blockchain technology on advancing the cybersecurity of firms across an array of sectors and industries with a particular  ...  Moreover, we examine the rise of blockchains through the lens of the literature on polycentric governance to ascertain what lessons this research holds to build trust in distributed systems and ultimately  ...  Proofs-of-Work Proofs-of-work are a fundamental technology underlying blockchains.  ... 
doi:10.2139/ssrn.2874090 fatcat:cjfjndmzwrhm5puq52hyvgnr34

Technological Populism and Its Archetypes: Blockchain and Cryptocurrencies

Asress Adimi Gikay, Catalin Gabriel Stanescu
2019 Social Science Research Network  
While the system works well enough for most transactions, it still suffers from the inherent weaknesses of the trust-based model. cryptocurrencies by mining. 137 The non-expert users may need to store  ...  We do not discuss the legitimate and limited use cases of blockchain 12 as that goes beyond the scope and purpose of our analysis.  ... 
doi:10.2139/ssrn.3379756 fatcat:gsmlqltsrfhsjdubbnppglae6m

Digital Contact Tracing Powered By Blockchain.pdf

Diego Roma
vaccinations relating to the virus and its symptoms, with the aim of containing, preventing the spread of the virusand intercepting a possible recurrence of the pandemic by using blockchain.  ...  deadlines, this paper aims to explore and consider possible solutions that could be put in place to keep borders safe from spill overs of COVID-19 by tracking travellers, and their medical records and  ...  /mckinsey-digital/our-insights/blockchain-beyond-the-hype-what-is-the-strategic-business-value BLOCKCHAIN SWOT ANALYSIS As there might be both centralized and decentralized models to coordinate our  ... 
doi:10.6084/m9.figshare.13330871.v1 fatcat:huqqp2hr25dgjj3gucqrdoozzu

Beyond Bitcoin: Leveraging Blockchain to Benefit Business and Society

Marcia Narine Weldon, Rachel Epstein
2019 Social Science Research Network  
Proof of authority does not require a mining mechanism involved. Hyperledger and Ripple are based on Proof of Authority. Narayan Prusty, What is Proof-of-Authoriy Consensus?  ...  Additionally, blockchain allows for the tracking of goods and data in real time, which enables more timely and accurate analysis.  ...  the blockchain to post contracts and proof of payments. 435 443 DeBeers hopes to have all players from miners to retailers on the platform and will also add in a KYC component.  ... 
doi:10.2139/ssrn.3443675 fatcat:jusej567zrgijlixcmlrrfdcju

Toxicity Analysis and Cry Gene Profiling of Bacillus Thuringiensis Isolated from Western Ghats of Tamil Nadu State, India

A. Ramalakshmi, P. Annakodi, V. Udayasurian, V. Balasubramani
2018 Proceedings of the Indian National Science Academy  
In fact, there were methods of storing like Quipu of Incas and tools for calculating like Chinese counting rods.  ...  There are various evidences of calculation as an ancient activity [Tedre, 2014] that dates back to Babylonian days used for varieties of navigational, astronomical and other day-to-day needs.  ...  A block is a unit of successfully completed work -therefore aptly named as blockchain. Proof-of-Work It is an algorithmic crux of the Bitcoin system, where nodes are incentivized to do work.  ... 
doi:10.16943/ptinsa/2018/49413 fatcat:2w6rohpbava5zh6m26tsiz7qky

Data Provenance

Peter Buneman, Wang-Chiew Tan
2019 SIGMOD record  
with a small amount of coordination.  ...  An invariant confluent object can be efficiently replicated with no coordination needed to preserve its invariants.  ...  This work was supported in part by a Hellman Fellowship and by the NIDDK of the NIH under award number R01DK114945.  ... 
doi:10.1145/3316416.3316418 fatcat:u4lmbha4fjgajlc46r66ryh7vi

The Sharing Economy in Europe [article]

Andrzej Klimczuk
2022 Zenodo  
The book will help in understanding the future (sharing) economy models as well as to contribute in solving questions of better access to resources and sustainable innovation in the context of degrowth  ...  and growing inequalities within and between societies.  ...  New forms of Acknowledgements The authors would like to thank Dr. Cary Yungmee Hendrickson for the insightful comments and generous feedback on prior drafts of this chapter.  ... 
doi:10.5281/zenodo.5905748 fatcat:rk5iix2effhu3nn6hokitppine

Multiple Dimensions of Community Network Scalability [chapter]

Roger Baig-Viñas, Leandro Navarro, Ramon Roca-i-Tio
2019 Zenodo  
Publication of the netCommons project  ...  Acknowledgements This work was carried out in the context of the MAZI project (2016)(2017)(2018) which has received funding from the European Union's Horizon Acknowledgements This work was funded by  ...  The work would not have been possible without the generous effort of the community and other community networks as part of the Dynamic Coalition on Community Connectivity (DC3).  ... 
doi:10.5281/zenodo.2560603 fatcat:iox3mfxejzbm3pslqrcirwf5la


Andreas Roos, Vasilis Kostakis, Christos Giotitsas
2016 tripleC: Communication, Capitalism & Critique  
millions of people in the proliferation of information, knowledge and active democratic collaboration?  ...  On the other hand, the rise of new and progressive social-economic foundations is the result of an unprecedented increase of information and communication technologies (ICTs).  ...  Acknowledgement: The authors would like to thank the tripleC editors, two anonymous reviewers, and Sy Adler for insightful comments on an earlier version of this paper.  ... 
doi:10.31269/triplec.v14i1.746 fatcat:mpnzo4loxbgyvdartoyglguzhm

Smart city - smart grid - smart contract

Thuy Nga Nguyen
2020 unpublished
All of this can facilitate the participation in green electricity generation and contribute towards a more sustainable power grid.  ...  Owing to blockchain-based smart contracts, prosumers are encouraged to get involved in direct trade using the peer-to-peer network.  ...  proof of work to be checked against.  ... 
doi:10.25365/thesis.64417 fatcat:377v5ihxrfbxhcdmfw6ea2j3cq

Exploring The Research Landscape Of Social Innovation – A Deliverable Of The Project Social Innovation Community (Sic)

Irene De Laurentiis, Alessandro Deserti, Domanski, Dmitri (Ed.), Christopher Graetz, Charlotte Heales, Ursula Holtgrewe, Kaletka, Christoph (Ed.), Hanna Kitcher, Erdmuthe Klaer, Sylvana Kroop, Luise Kuschmierz, Álvaro Luna García (+5 others)
2017 Zenodo  
The report reflects upon these communites seperatly and provides an overview of the current research landscape in Europe and beyond.  ...  The findings of the report can be used by all those who work in social innovation and are looking for new opportunities to get involved with a community, which is growing in a very dynamic way.  ...  ZSI uses a transdisciplinary approach in different areas of action. The centre's work combines research, consulting, network coordination and education into an overall concept.  ... 
doi:10.5281/zenodo.825169 fatcat:edphq4stf5byxlts473srvkyde
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