• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제16권5호
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• pp.566-570
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• 2010

본 논문에서는 기존 유스케이스 점수 기법의 공수 예측 정확도 향상을 위해 유스케이스 트랜잭션을 기반으로 한 공수 예측 기법을 제안한다. 유스케이스 점수 기법은 소프트웨어 유스케이스 모델을 기반으로 하는 공수 예측 기법으로서 객체 지향 소프트웨어 개발 프로젝트에서 사용되고 있다. 그러나 유스케이스 점수는 트랜잭션의 개수를 규모 산정의 단위로 활용하여 트랜잭션 별 구현 공수의 차이를 반영할 수 없고 트랜잭션 수의 범위에 따라 유스케이스의 규모를 결정함으로써 상이한 트랜잭션 수를 갖는 유스케이스들이 공수 예측 시 동일한 크기로 반영되어 상세수준에서의 문제를 갖는다. 이런 한계점들은 부정확한 공수 예측을 야기하여 프로젝트의 성공률을 저해하는 요소가 될 수 있다. 이를 개선하기 위해 본 논문에서는 공수 예측 시 트랜잭션을 단위 연산으로 세분화하고, 각 연산에 대한 복잡도를 활용하여 규모를 산정하는 트랜잭션 점수 기법을 제안하고자 한다.

• 한국정보과학회논문지:데이타베이스
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• 제32권1호
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• pp.86-99
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• 2005

본 논문에서는 프로그램 분석 기술에 기반하여, 주어진 프로그램 내에서 트랜잭션 처리 관련 오류를 자동으로 검출해주고, 성능저하 요소가 발견되면 자동으로 개선된 코드로 변환하여 주는 시스템을 제안한다 트랜잭션 처리 오류란 트랜잭션을 열고서 닫지 않는 경우나, 잘못된 잠금수준(Locking-Level)을 설정하는 경우를 말한다 전자의 경우, 원하는 대로 데이타가 저장되지 않거나 장시간 데이타베이스 테이블을 잠금(Locking)으로써 시스템 전체의 성능을 떨어뜨릴 수 있다. 후자의 경우. 시스템에 따라 예외상황이나 프로그램의 파행적 실행 중단을 야기한다. 비효율적인 트랜잭션 처리란, 트랜잭션 영역(Boundary) 또는 잠금수준을 비효율적으로 설계하여서 다른 프로세스들의 트랜잭션을 지연시키는 경우를 말한다.

• 한국컴퓨터정보학회논문지
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• 제24권4호
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• pp.65-71
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• 2019

IAs smart device penetration rate is more than 90%, mobile transaction ratio using smart device is increasing. Smart contracts are used in various areas of real life including smart trading. By applying smart contracts to the platform for smart transactions through block-chain technology, the threat of hacking or forgery can be reduced. However, various threats to devices in smart transactions can pose a threat to the use of block chain Etherium, an important element in privilege and personal information management. Smart contract used in block chain Ethereum includes important information or transaction details of users. Therefore, in case of an attack of privilege elevation, it is very likely to exploit transaction details or forge or tamper with personal information inquiry. In this paper, we propose a detection and countermeasure method for privilege escalation attack, which is especially important for block chain for secure smart transaction using block chain Ethereum. When comparing the results of this study with the results of similar applications and researches, we showed about 12~13% improvement in performance and suggested the future countermeasures through packet analysis.

• Journal of Information Technology Applications and Management
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• 제16권1호
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• pp.169-183
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• 2009

The purpose of this research, based on the Media Selection Theory, the Technology Acceptance Model, and the Social Influence Theory, is to investigate the influential factors that affect media selection in banking transactions. Analyses showed that for location sensitive bank windows and ATMs(automatic teller machines), defined as offline-based transaction channels, convenience was the variable affecting media selection. However, in the case of online media not related to location, (phone banking, internet banking, and mobile banking) reliability was the significant variable influencing use. The findings show that banking organizations may benefit from identifying traits of media affecting use, and should differentiate customer services for competitive advantage.

• Journal of Information Technology Applications and Management
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• 제11권1호
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• pp.53-67
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• 2004

We propose an advanced transaction scheduling protocol to improve the concurrency and to guarantee the mobility for the mobile database management systems. Mobility, portability, and wireless link In mobile computing environment can cause certain drawbacks, and thus it is more difficult to solve the concurrency control problems. However, a locking scheme should be used to guarantee the data consistency and to prevent the data conflicts. It is well known that data consistency is guaranteed by standard transaction scheduling schemes like two-phase locking (2PL). It has two of operation, lock and unlock. But 2PL does not give solution for mobile system. Altruistic Locking (AL) and classifying transactions, we adapt, can give solution for the previous problems. AL, as an advanced protocol, has attempted to reduce delay effects associated with lock release moment by the use of donation. In this paper, we extend those approaches and classify the transactions to reduce delay effects of short-lived transaction caused by long-lived transaction. In addition, we show efficient solution for the case of disconnection occurrence. Our protocol, namely, Mobile Altruistic Locking (MAL) is shown to be efficiently used in order to reduce delay effects and to guarantee database consistency in a state of the slippery connection in mobile database systems.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.949-958
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• 2021

This study aims to develop a theoretical model in order to determine factors affecting consumer intention to use credit cards by combining Theory of perceived risk and Technology acceptance model. Despite of perspective of consequences in prior studies on related research fields, this study focuses on the sources of perceived risk, including transaction, payment and credit risks, which are proposed and measured in a preliminary research. A measurement model and a structural model with the presence of perceived risk in sources are tested in a formal research with data collected from 538 bank customers. An analysis results show that payment risk, usefulness, transaction risk, ease of use, and credit risk influence significantly Vietnamese consumers' intention to use credit cards in decreasing order of influence. These factors account for 64.6% of the variation in intended use. All three dimensions of perceived risk have a negative effect on the intention to use, with the total impact greater than the level of influence of the other two factors of usefulness and ease of use. These findings can be beneficial to banks in enacting policies to attract more consumers and to allocate resources for improving their credit card business.

• 정보과학회 논문지
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• 제42권9호
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• pp.1117-1123
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• 2015

소프트웨어의 규모측정 기법 중 하나인 유스케이스 점수(Use Case Points; UCP)는 고객 기능 요구사항에 기반하여 규모를 측정한다. 이 때 요구사항 분석자의 유스케이스 추상화 수준에 따라 유스케이스 수의 차이가 발생하고, 이는 UCP에 많은 영향을 미친다. 본 논문에서는 요구사항 분석자의 추상화 수준에 따른 유스케이스 수의 편차를 줄이기 위해 단위기능으로 분할하는 방법을 제안함으로써 측정자에 따른 UCP의 편차를 줄이고자 한다. 이 방법은 스텝, 트랜잭션, Narrative 중심으로 접근한 기존의 UCP 방법보다 측정자에 따른 UCP의 편차를 줄일 수 있어 신뢰성 있는 소프트웨어 규모측정이 가능하다.

• 지식경영연구
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• 제21권1호
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• pp.61-78
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• 2020

Recently, in the global financial transaction field, global transactions using computer systems and server hubs between foreign exchanges beyond the one-dimensional offline transactions and two-dimensional online transactions have been actively conducted. In the previous research by Lee Hyung-wook and Lee Min-jae (2018), as the globalization has accelerated following the development of digital technology and the expansion of ubiquitous communication network, the role of companies, the attribute of economic value creation and economic structure are being reorganized. It is said that O2O (Online to Offline) transactions are increasing due to the development. As a result, a new financial transaction paradigm is emerging that solves the inconveniences of existing financial services and enhances speed and convenience. Considering the global network trend and the rapidly developing and evolving digital bank environment, the necessity of utilizing the business platform model is emerging. However, despite this necessity, there are very limited cases in which such an attempt has been applied in practice. Accordingly, this study seeks to explore the business platform of the new financial transaction system. Specifically, the case study systematically examines the actual implementation of a unique network connection model with Koscom's global investment bank, which is currently in charge of the domestic financial transaction system, and improves ICT innovation performance and process through this. I would like to suggest a solution. In particular, this study analyzed a variety of business model construction and use cases by pursuing a platform connection with digital banks, which has recently been increasingly in demand. Therefore, this study intends to pursue the original and long-term profitability of the company by utilizing ICT innovation and platform business model, and also analyzes the convenience and excellence of trading for institutional and individual investors using the platform of digital bank. The implications of this study are significant in that it explores and explores the actual cases of ICT innovation and additional digital bank platform-connected business models based on this, and suggests a unique and preemptive business strategy of the company in the future.

• 디지털융복합연구
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• 제6권3호
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• pp.75-84
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• 2008

The purpose of our this research, based on the Media Selection Theory, the Technology Acceptance Model, and the Social Influence Theory, is to investigate the influential factors that affect media selection in banking transactions. Analyses showed that for location sensitive bank window's and ATMs (automatic teller machines), defined as offline-based transaction channels, convenience was the variable affecting media selection. However, in the case of online media not related to location, (phone banking, internet banking, and mobile banking) reliability was the significant variable influencing use. The findings show that banking organizations may benefit from identifying traits of media affecting use, and should differentiate customer services for competitive advantage.

• 한국융합학회논문지
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• 제4권2호
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• pp.15-20
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• 2013

본 연구는 대형유통업체와 거래 관계에 있는 제조업체가 대형유통업체가 보유한 물류창고를 활용하는 데에 따른 물류비용의 효율성을 측정하기 위한 요인들을 도출하는데 목적을 두고 있다. 대형유통업체와 거래를 하고 있는 제조업체가 물류 방식을 결정할 때 대형유통업체의 물류창고를 이용하거나 혹은 제조업체가 보유한 자체 물류창고 및 이미 활용하고 있는 외주 물류창고를 이용할 수가 있다. 이 때 제조업체가 어떠한 물류창고를 이용하는가에 따라 물류비용의 효율성은 달라질 것이다. 또한 제조업체가 이용할 물류창고를 결정하게 하는 다양한 요인들이 있을 것이다. 이에 본 연구에서는 제조업체가 이용할 물류창고 결정 요인으로 제조업체와 유통업체 간의 시장지배력과 같은 영향력 변수로써 사업 환경의 불확실성의 정도, 제조업체가 보유한 역량, 제조업체와 대형유통업체의 거래 특성 요인들을 도출하였으며, 이들 요인은 물류창고 비용효율성을 측정할 수 있는 지표로 활용할 수 있을 것이다.