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Arduino IoT Studio based on 5W1H Programming Model for non Programmer
Hong-Gab Im(임홍갑),Yeong-Tae Baek(백영태),Se-Hoon Lee(이세훈),Ji-Seong Kim(김지성),Bo-Bae Sin(신보배) 한국컴퓨터정보학회 2017 韓國컴퓨터情報學會論文誌 Vol.22 No.2
In this paper, we present a 5W1H programming model for IT non-experienced people who are not familiar with computer programming and those who need programming education. Based on this model, we can design a development tool that can be easily programmed by beginners. This development tool is a programming method applying the 5W1H concept and constructs a sentence to satisfy the control condition of "Who, When, Where, What, and How", which is the sentence element of 5W1H. Therefore, the user can easily develop the target system as if constructing the sentence without learning the programming language of the target system. In this paper, to verify the effectiveness of the 5W1H programming model proposed in this paper, we applied the concept of 5W1H programming to Arduino and developed the development tool and performed the first verification and applied the second verification to the speech recognition smart home development platform.
금융업에서 블록체인 활용을 위한 합의 알고리즘 수정 연구
임홍갑(Hong-Gab Im) 한국컴퓨터정보학회 2021 韓國컴퓨터情報學會論文誌 Vol.26 No.12
블록체인 기술은 분산 네트워크에 연결된 다수의 노드 간 원장을 공유하는 분산 원장기술이다. 기존 중앙 서버를 통하여 관리되던 데이터들이 블록체인을 통하여 관리되며 거래 데이터에 대한 투명성과 정확성 및 무결성이 높아지며 블록체인을 통한 데이터관리의 필요성이 높아지고 있다. 본 논문에서는 금융업에서 신뢰 기반의 기관 간 신뢰 기반의 데이터 공유가 필요하다는 점을 인지하고 블록체인을 통한 데이터관리 효율성 증대를 높이는 방법으로 프라이빗 블록체인 합의 알고리즘인 Raft의 리더 노드 선출과정의 처리 과정을 수정한 합의 알고리즘을 제시하였다. 본 논문에서 제시한 수정 합의 알고리즘과 일반적인 Raft 합의 알고리즘에 대하여 트랜잭션 처리시간을 기준으로 성능을 비교·분석하였으며 제안한 합의 알고리즘 적용을 통하여 합의 과정의 효율성이 높아짐을 확인하였다. Blockchain technology is a distributed ledger technology that shares the ledger between multiple nodes connected to a distributed network. The data managed through the existing central server is managed through the blockchain, and the transparency, accuracy, and integrity of the transaction data is increased, and the need for data management through the blockchain is increasing. In this paper, recognizing the need for trust-based data sharing between trust-based institutions in the financial industry, this paper describes the process of selecting leader nodes in Raft, a private blockchain consensus algorithm, as a way to increase data management efficiency through blockchain. A modified consensus algorithm is presented. The performance of the modified consensus algorithm and the general Raft consensus algorithm presented in this paper was compared and analyzed based on the transaction processing time, and it was confirmed that the efficiency of the consensus process was increased by applying the proposed consensus algorithm.