scholarly journals DDNB—Doubly Decentralized Network Blockchain Architecture for Application Services

2020 ◽  
Vol 10 (15) ◽  
pp. 5212
Author(s):  
Youhwan Seol ◽  
Jaehong Ahn ◽  
Sehyun Park ◽  
Mookeun Ji ◽  
Heungseok Chae ◽  
...  
Keyword(s):  
Processing Speed ◽  
Prototype System ◽  
Proof Of Concept ◽  
Service Platform ◽  
Blockchain Technology ◽  
Platform Architecture ◽  
Application Service ◽  
Verification Process ◽  
Application Developers

Decentralization and immutability characteristics of blockchain technology has attracted numerous blockchain-based systems and applications to be proposed. However, technical shortcomings such as low transaction speed, complexity, scalability, and vulnerability to certain attacks have been identified, making it challenging to use the technology on general consumer applications and services. To address the problem, we propose a new application service platform architecture called DDNB (Doubly Decentralized Network Blockchain). DDNB divides the system into multiple layers in order to take advantage of permissioned blockchain for its processing speed and security, while allowing permissionless open use of the system to application developers. To allow any node to freely participate in application services, DDNB adopts a novel periodic node self-verification process and query chaining mechanism to authenticate newly joining nodes and validate transactions effectively and efficiently. The proposed architecture is evaluated in terms of its processing speed and security on a real proof-of-concept prototype system.

scholarly journals Third Party Certification of Agri-Food Supply Chain Using Smart Contracts and Blockchain Tokens

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5307
Author(s):  
Ricardo Borges dos Santos ◽  
Nunzio Marco Torrisi ◽  
Rodrigo Palucci Pantoni
Keyword(s):  
Supply Chain ◽  
Mobile Application ◽  
Consumer Behaviour ◽  
Economic Incentives ◽  
Third Party ◽  
Smart Contracts ◽  
Proof Of Concept ◽  
Socially Responsible ◽  
The Public ◽  
Blockchain Technology

Every consumer’s buying decision at the supermarket influences food brands to make first party claims of sustainability and socially responsible farming methods on their agro-product labels. Fine wines are often subject to counterfeit along the supply chain to the consumer. This paper presents a method for efficient unrestricted publicity to third party certification (TPC) of plant agricultural products, starting at harvest, using smart contracts and blockchain tokens. The method is capable of providing economic incentives to the actors along the supply chain. A proof-of-concept using a modified Ethereum IGR token set of smart contracts using the ERC-1155 standard NFTs was deployed on the Rinkeby test net and evaluated. The main findings include (a) allowing immediate access to TPC by the public for any desired authority by using token smart contracts. (b) Food safety can be enhanced through TPC visible to consumers through mobile application and blockchain technology, thus reducing counterfeiting and green washing. (c) The framework is structured and maintained because participants obtain economical incentives thus leveraging it´s practical usage. In summary, this implementation of TPC broadcasting through tokens can improve transparency and sustainable conscientious consumer behaviour, thus enabling a more trustworthy supply chain transparency.

scholarly journals Verification Of Independent Study Assessment Using Blockchain Technology

2020 ◽  
Vol 2 (11) ◽  
pp. 15-21
Author(s):  
Ria Dwi I’zzaty
Keyword(s):  
Teaching And Learning ◽  
Independent Study ◽  
Assessment System ◽  
Learning System ◽  
Assessment Process ◽  
Decentralized System ◽  
Blockchain Technology ◽  
Technological Developments ◽  
Verification Process ◽  
Student Grades

Current technological developments greatly impact the assessment verification system. To find out the student benchmarks in the results of teaching and learning activities during the learning system assessment process is very important in the scope of higher education. With the existence of blockchain technology widely applied in the world of Education, having the advantage of a decentralized system and strong cryptography can help universities in building infrastructure. Universitas Raharja is one of the educational institutions that has implemented an online assessment system (PEN +), which will use blockchain technology to verify the assessment of independent studies. which provides services to Raharja University lecturers in verifying student grades that can be accessed anywhere and at any time. However, currently the verification process for the independent study assessment that has been carried out is still done manually which results in verification not with very strong security. The existence of an independent study assessment verification uses blockchain technology to produce strong data security that did not occur before. In the PEN + lecturer assessment system for the independent study assessment verification process, it cannot yet enter the value of Independent study (IS) in real time. Therefore, there is a need for development in this blockchain technology for the verification process of independent study assessment. In this study there were 10 (ten) literary studies on verification of valuation. Thus there are several benefits that lecturers need not hesitate to verify the assessment, the process by using blockchain technology produces very strong security.

scholarly journals Blockchain protocols in clinical trials: Transparency and traceability of consent

F1000Research ◽  
2017 ◽  
Vol 6 ◽  
pp. 66 ◽  
Author(s):  
Mehdi Benchoufi ◽  
Raphael Porcher ◽  
Philippe Ravaud
Keyword(s):  
Clinical Trial ◽  
Research Field ◽  
Point Of View ◽  
Complex Data ◽  
Proof Of Concept ◽  
Chronological Order ◽  
Blockchain Technology ◽  
Smart Contract ◽  
The Right ◽  
Core Functionality

Clinical trial consent for protocols and their revisions should be transparent for patients and traceable for stakeholders. Our goal is to implement a process allowing the collection of patients’ informed consent, which is bound to protocol revisions, storing and tracking the consent in a secure, unfalsifiable and publicly verifiable way, and enabling the sharing of this information in real time. For that, we will built a consent workflow using a rising technology called Blockchain. This is a distributed technology that brings a built-in layer of transparency and traceability. Additionally, it removes the need for third parties, and gives participative control to the peer-to-peer users. From a more general and prospective point of view, we believe Blockchain technology brings a paradigmatical shift to the entire clinical research field. We designed a Proof-of-Concept protocol consisting of time-stamping each step of the patient’s consent collection using Blockchain; thus archiving and historicising the consent through cryptographic validation in a securely unfalsifiable and transparent way. For each revision of the protocol, consent was sought again. We obtained a single document, in a standard open format, that accounted for the whole consent collection process: timestamped consent status with regards to each version of the protocol. This document cannot be corrupted, and can be checked on any dedicated public website. It should be considered as a robust proof of data. In the future, we think that the complex data flow of a clinical trial can be tracked using Blockchain. Moreover, a blockchain core functionality, named Smart Contract, can help prevent clinical trial events not to happen in the right chronological order: including patients before they consented or analysing case report forms data before freezing the database. This will help reaching reliability, security, and transparency, and could be a consistent step towards reproducibility.

Blockchain Integration Into Supply Chain Operations

2021 ◽  
pp. 329-350
Author(s):  
Yigit Sever ◽  
Pelin Angin
Keyword(s):  
Supply Chain ◽  
Supply Chains ◽  
Global Supply Chains ◽  
Central Authority ◽  
Proof Of Concept ◽  
Pilot Studies ◽  
Blockchain Technology ◽  
History Of ◽  
Trusted Data

Following the globalization initiated by containerization of logistics, supply chains might be due another revolution by the integration of the disruptive blockchain technology that addresses the current issues with the management of complex global supply chains. Blockchains are distributed digital ledgers that require no central authority to operate while offering a tamper-proof and transparent history of each transaction from the very beginning. Distributed nature of these ledgers ensure that every participant of the supply chain has access to trusted data. The industry has already begun experimenting with blockchain integration into their operations. For the majority of the organizations, however, these experiments stay in proof-of-concept stages or small pilot studies. In this chapter, the authors discuss the supply chain characteristics that make blockchain integration favorable, lay the groundwork for how blockchain can be used for supply chain operations and how it has been used so far.

A Service-Oriented User Interface for the Next Generation Web

2011 ◽  
Vol 2 (2) ◽  
pp. 60-76
Author(s):  
Shiping Chen ◽  
Surya Nepal
Keyword(s):  
User Interface ◽  
Interface Design ◽  
Cost Model ◽  
Prototype System ◽  
Proof Of Concept ◽  
Next Generation ◽  
New Era ◽  
Back Seat ◽  
Service Oriented ◽  
User Tasks

The Web enters a new era where contents are to take the back seat and services will take the driver seat to form a service-oriented Web. This paper presents a service-oriented user interface design for the next generation Web. The design leverages the advances of semantic Web and service composition technologies to provide an intelligent and generic user interface to query, compose and execute Web services for a variety of user tasks. First, a simple cost model is developed for estimating the development and learning overheads of Web service interfaces for service-oriented applications as the motivation of this work. Then, the authors present the design of the service-oriented browser and discuss the enabling technologies. A prototype system is developed using existing technologies and standards as a proof of concept.

Partner Selection in ASP-Based Automobile Panel Die Dynamic Alliance

2011 ◽  
Vol 101-102 ◽  
pp. 812-816
Author(s):  
Xian Liang Zong ◽  
Hui Zheng ◽  
Yu Sun
Keyword(s):  
Partner Selection ◽  
Prototype System ◽  
Application Service Provider ◽  
Dynamic Alliance ◽  
Combination Optimization ◽  
Application Service ◽  
Automobile Panel ◽  
Panel Die ◽  
Selection Of ◽  
Three Phases

Application service provider (ASP) based dynamic alliance has great advantages in die industry. This paper presents a complete scheme for establishing an ASP-based dynamic alliance for automobile panel die industry. The proposed scheme divides the job of partner selection into three phases, i.e., discovery of potential partners, junior evaluation and selection of potential partners and combination optimization of dynamic alliance. Methods for the three phases of partner selection are proposed and discussed. A prototype system has been developed to confirm the proposed scheme’s feasibility and efficiency.

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