• 인터넷정보학회논문지
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• 제23권2호
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• pp.97-105
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• 2022

Web services show a rapid evolution and integration to meet the increased users' requirements. Thus, web services undergo updates and may have performance degradation due to undetected faults in the updated versions. Due to these faults, many performances and regression anomalies in web services may occur in real-world scenarios. This paper proposed applying the deep learning model and innovative explainable framework to detect performance and regression anomalies in web services. This study indicated that upper bound and lower bound values in performance metrics provide us with the simple means to detect the performance and regression anomalies in updated versions of web services. The explainable deep learning method enabled us to decide the precise use of deep learning to detect performance and anomalies in web services. The evaluation results of the proposed approach showed us the detection of unusual behavior of web service. The proposed approach is efficient and straightforward in detecting regression anomalies in web services compared with the existing approaches.

• Journal of Construction Engineering and Project Management
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• 제8권4호
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• pp.1-24
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• 2018

In the last decade, the use of Building Information Modeling (BIM) as a new technology has been applied with traditional Computer-aided design implementations in an increasing number of architecture, engineering, and construction projects and applications. Its employment alongside construction management, can be a valuable tool in helping move these activities and projects forward in a more efficient and time-effective manner. The traditional stakeholders, i.e., Owner, A/E and the Contractor are involved in this BIM system that is used in almost every activity of construction projects, such as design, cost estimate and scheduling. This article extracts major features of the application of BIM from perspective of participating BIM components, along with the different phrases, and applies to them a logistic analysis using a fuzzy performance tree, quantifying these phrases to judge the effectiveness of the BIM techniques employed. That is to say, these fuzzy performance trees with fuzzy logic concepts can properly translate the linguistic rating into numeric expressions, and are thus employed in evaluating the influence of BIM applications as a mathematical process. The rotational fuzzy models are used to represent the membership functions of the performance values and their corresponding weights. Illustrations of the use of this fuzzy BIM performance tree are presented in the study for the uninitiated users. The results of these processes are an evaluation of BIM project performance as highly positive. The quantification of the performance ratings for the individual factors is a significant contributor to this assessment, capable of parsing vernacular language into numerical data for a more accurate and precise use in performance analysis. It is hoped that fuzzy performance trees and fuzzy set analysis can be used as a tool for the quality and risk analysis for other construction techniques in the future. Baldwin's rotational models are used to represent the membership functions of the fuzzy sets. Three scenarios are presented using fuzzy MEAN, AND and OR gates from the lowest to intermediate levels of the tree, and fuzzy SUM gate to relate the intermediate level to the top component of the tree, i.e., BIM application final performance. The use of fuzzy MEAN for lower levels and fuzzy SUM gates to reach the top level suggests the most realistic and accurate results. The methodology (fuzzy performance tree) described in this paper is appropriate to implement in today's construction industry when limited objective data is presented and it is heavily relied on experts' subjective judgment.

• International Journal of Advanced Culture Technology
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• 제10권2호
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• pp.225-232
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• 2022

When we drive a vehicle in an IoT environment, there is a problem in that information of car users is collected without permission. The security measures used in the existing wired network environment cannot solve the security problem of cars running in the Internet of Things environment. Information should only be shared with entities that have been given permission to use it. In this paper, we intend to propose a method to prevent the illegal use of vehicle information. The method we propose is to use attribute-based encryption and dynamic threshold encryption. Real-time processing technology and cooperative technology are required to implement our proposed method. That's why we use fog computing's proxy servers to build smart gateways in cars. Proxy servers can collect information in real time and then process large amounts of computation. The performance of our proposed algorithm and system was verified by simulating it using NS2.

• International Journal of Knowledge Content Development & Technology
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• 제9권3호
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• pp.43-61
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• 2019

The purpose of the study is to investigate the influence of demographic factors (age and job status), level of ICT skills possessed by respondents and ICT use on task performances of library personnel. The study employed correlation design. Thirteen public universities were purposely selected while total enumeration was adopted to study 248 library personnel made up of librarians and library officers in public university libraries in South-west, Nigeria. Data was collected by questionnaire. The study established significant positive correlation between age, job status, ICT skills and task performance. Also, Anova test found significant joint influence of age, job status, ICT skills and ICT use on task performances of respondents. The study further indicated that age, job status, ICT skills possessed by respondents and ICT use had relative significant influence on task performances of respondents. It is therefore recommended that, library personnel must leverage their demographics positively to bring about positive disposition to their jobs while all categories of staff must ensure they possessed the requisite ICT skills that will ginger ICT use for effective task performance.

• 한국통신학회논문지
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• 제33권11C호
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• pp.868-873
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• 2008

본 논문에서는 수직 자기기록 채널에서 연집에러에 따른 LDPC(low density parity check) 부호의 성능을 분석한다. 수직 자기기록 채널에서 연집에러가 발생하면 수신부에서는 채널상태정보(channel state information)를 통하여 연집에러 부분을 알아낸 후 채널검출기의 연판정(Log Likelihood Ratio) 값을 0으로 초기화하는 방법을 사용한다. 패리티 검사 행렬은 부호율이 0.94인 (4336,4096)와 (8672,8192)를 사용한다. 그리고 채널 검출기는 연산량이 적은 SOVA(soft output Viterbi algorithm)를 사용한다.

• 한국산업정보학회논문지
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• 제15권1호
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• pp.85-94
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• 2010

e-Learning으로 대변되는 교육의 변화는 교육환경의 기술적인 측면뿐만 아니라 패러다임 자체를 바꾸어 놓고 있다. e-Learning 환경에서의 사용자는 시스템 사용자뿐만 아니라 학습자의 역할을 동시에 가지고 있기 때문에 이런 복잡한 현상을 설명하기 위해서는 보다 포괄적인 시각이 필요하다고 판단된다. 본 연구에서는 포괄적인 시각을 연구하기에 앞서 학습자의 동기 유발에 초점을 두고 학습 성과를 향상시킬 수 있는 방안을 플로우 이론을 이용하여 제시하고자 한다. 연구 결과 첫째, 플로우의 구성 요소인 내재된 흥미와 주의집중은 종속 변수인 학습 성과에 유의적인 영향을 미치고 있으며, 특히 내재된 흥미가 주의집중보다 더 중요한 요인으로 밝혀졌다. 둘째, 내재된 흥미에 영향을 미치는 요인은 정보 품질과 숙련도로 나타났으며, 셋째, 주의집중에 영향을 미치는 요인은 인지된 사용용이성, 숙련도, 컴퓨터 자기효능감으로 나타났다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.547-549
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• 2007

고속 네트워크로 연결된 병렬 컴퓨터 및 클러스터 시스템의 응용 분야가 다양화되고 사용자가 증가함에 따라 분산 및 병렬 파일 시스템에 대한 관심이 높아지고 있다. 특히 복잡한 네트워크로 구성된 클러스터 시스템을 보다 효율적으로 사용하기 위해서 분산 및 병렬 파일 시스템의 성능을 최적화하려는 많은 연구가 진행 중이다. 본 논문에서는 소규모 클러스터 시스템에서 널리 사용되고 있는 파일 시스템인 PVFS(Parallel Virtual File System)의 성능을 분석하고, 주어진 네트워크 환경에 따라 성능을 최적화할 수 있는 방법인 FlowBuffer의 따른 변화에 PVFS의 성능을 비교 분석하였다.

• The Journal of Asian Finance, Economics and Business
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• 제9권4호
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• pp.93-98
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• 2022

The article analyzes the impact of factors affecting the use of cost information is examined, which adds to the empirical evidence on the factors affecting the use of cost information in Vietnam's seafood processing firms. 58 seafood processing firms in Vietnam were surveyed using a questionnaire survey of all levels of management, chief accountants, and accountants. A total of 235 questionnaires were gathered for the survey. Because many of the surveys were invalid due to empty cells, the author selected to use 214 questionnaires. The 5-level Likert scale is familiarly used in many studies, so the author also quantifies each factor according to five levels. Quantitative research was carried out with SPSS 25 software. Research results show that 4 factors The function of cost information, cost management, information technology, and management support in the seafood processing industry in Vietnam all have a positive impact on the use of cost information. The author has provided recommendations based on the research findings to expand the use of cost information, consequently helping to improve the performance of Vietnamese seafood processing businesses. Managers must improve a variety of resources, including facilities (software, hardware), people (in-depth training on CAS for administration), departmental awareness, and UCI's ability to assess responsibility and reward in the organization.

• 경영과학
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• 제19권2호
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• pp.25-39
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• 2002

This study suggests a revised TAM (Technology Acceptance Model)-based performance evaluation model in MS (management science) education. Recently, many MS education programs are developed on the basis of computer and Internet communication technology. Previous researchers used TAM as an individual performance evaluation model, and proved that perceived usefulness and perceived ease of use are the substantive successful factors. This study provides a revised TAM-based conceptual framework for understanding what is involved in improving university MS education and what might be implied by conducting research on its improvement. It is argued in this research that three sets of forces and conditions have a direct and indirect impact on MS education ; first, each student has self efficacy and it is a critical determinant of behavior next, the use of Internet-based information system at MS education affects on the renewal of MS education : and finally, perceived usefulness and perceived ease of use have impacts on behavioral intention and actual system usage. This research concludes with suggestions for which direction this framework provides for future research on the premise and limits of efforts to renew MS education in university.

• 한국정보시스템학회지:정보시스템연구
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• 제28권3호
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• pp.159-202
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• 2019

Purpose The purpose of this study is to explain users' wearable healthcare device adoption using performance expectancy, effort expectancy, the hedonic motivation and price value of UTAUT2, and to identify the causal relationship between intention to use wearable healthcare device and innovation resistance formed by perceived risks. Design/methodology/approach The research model proposed in this study is based on UTAUT2(Extended Unified Theory of Acceptance and Use of Technology) and MIR(Model of Innovation Resistance). In specific, performance expectancy, effort expectancy, hedonic motivation and price value of UTAUT2 and innovation resistance formed by perceived risks of MIR are adopted in our research model. To validate the research model, we carry out the analysis of the survey data using Smart PLS 3.0 to test the hypotheses. Findings According to the empirical analysis results, this study confirms that the performance expectancy, effort expectancy, hedonic motivation, and price value have significant effects on the intention to use wearable healthcare devices. It also finds that perceived risk affects innovation resistance and in turn, innovation resistance affects the intention to use wearable healthcare devices.