• 한국주거학회논문집
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• 제13권6호
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• pp.133-140
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• 2002

This study researches the dwelling satisfaction about apartment remodeling by inspecting ten apartments located in Gwang-Ju, Jun-Nam province. The method of study is to use the field study method, which is based on cultural anthropology, and the participant observation method at same time. According to the research, we find those things as they follow. First, the participation of residents and the mutual agreement are necessary in the process of the selecting a company. Furthermore it's hard to solve the problem about an uniform design and an inferior construction. These things are the most serious factor in dissatisfaction of resident environment. Second, the space of storage and veranda should be separated for the proper functions and the space for laundry is necessary. The rooms, except bedroom, and the bathroom in the main living room should be used for practical application because they are not used so often and if we make the veranda as a inner space, we've got to make a gardening plan, too. Through this research we find out that the participation of an expert company and residents for enough communication and mutual agreement and the space plan for the satisfaction of occupants are necessary for the proper apartment remodeling.

• 한국산학기술학회논문지
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• 제14권10호
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• pp.4700-4705
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• 2013

본 연구에서는 스마트폰을 사용하는데 있어서 사용편이성, 특히 사용자 인터페이스 측면에서의 사용편이성에서 어떤 차이가 있는지를 스마트폰의 기능적인 측면에서 알아보았다. 이를 위해 스마트폰을 3그룹으로 나누고 12종류의 기능 요소에 대해 KLM 모델에 의한 예측치와 실제 기능 수행에 따른 실측치를 구하였다. 그 결과 기본적으로 사용자들이 자주 사용하는 보편적인 기능 요소들에 있어서 실행시간의 차이는 보이지 않았다. 그러나 복잡한 처리가 수반되는 기능 수행에 있어서는 실행시간에 있어서 통계적으로 유의한 결과가 나타났다. 또한 기능 요소별 실측치의 표준편차가 비교적 큰 것을 알 수 있었다. 이는 현재 제공되고 있는 스마트폰 사용자 인터페이스가 최적의 상태가 아니라는 것을 시사하며 스마트폰 사용자 인터페이스 방식의 개선이 필요하다는 것을 알려준다.

• 한국정보시스템학회지:정보시스템연구
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• 제18권3호
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• pp.111-134
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• 2009

Today many owners of Web sites are looking to user's satisfaction survey as a key means of measuring the usability of a Web site. While it is preferred for it simplicity and ease of use, this survey method is not without potential risks. This paper focuses on showing that the existing practice of questionnaire-based usability measurement is subject to human recall errors, and that such flaws can be reduced when the questionnaire survey is followed by the users hands-on experience of the site. An empirical study was conducted, and the results indicate that the above speculation holds true. Even if respondents felt highly confident about their responses on a recall survey, a hands-on experience with a focal Web site increased the extent to which the respondents were satisfied with the shopping mall site. This indicates that a user's perception of the quality of a Web site may be distorted or lost as time goes by. In addition, the findings have shown that the use of the verbal protocol analysis method can reveal critical information that can help track the root causes of Web site usability problems, thereby helping to develop site enhancement strategies. The paper concludes with directions for future research.

• Journal of information and communication convergence engineering
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• 제15권2호
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• pp.91-96
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• 2017

PIN-entry interfaces have high risks to leak secret values if the malicious attackers perform shoulder-surfing attacks with advanced monitoring and observation devices. To make the PIN-entry secure, many studies have considered invisible radio channels as a secure medium to deliver private information. However, the methods are also vulnerable if the malicious adversaries find a hint of secret values from user's $na{\ddot{i}}ve$ gestures. In this paper, we revisit the state-of-art radio channel based bimodal PIN-entry method and analyze the information leakage from the previous method by exploiting the sight tracking attacks. The proposed sight tracking attack technique significantly reduces the original password complexities by 93.8% after post-processing. To keep the security level strong, we introduce the advanced bimodal PIN-entry technique. The new technique delivers the secret indicator information through a secure radio channel and the smartphone screen only displays the multiple indicator options without corresponding numbers. Afterwards, the users select the target value by following the circular layout. The method completely hides the password and is secure against the advanced shoulder-surfing attacks.

• 한국도서관정보학회지
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• 제43권3호
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• pp.353-384
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• 2012

본 연구는 최근에 이슈가 되고 있는 필터버블 문제와 프라이버시 침해 문제가 이용자맞춤형서비스를 제공하는 도서관과 무관하지 않다는 인식에서 수행되었다. 본 연구에서는 최첨단기술을 활용하는 위치기반서비스, 상황인식서비스, 책추천서비스, RFID기반서비스, 클라우드서비스가 어떤 측면에서 개인정보침해 및 프라이버시 침해가능성이 있는지를 고찰하였다. 또한 특정 서비스 이용을 위해 개인정보를 제공한 이용자는 개인정보를 포기한 것으로 보아야 하는지, 국내 도서관에서 도서관 이용자의 프라이버시 문제가 논의된 적이 있는지, 필터버블 문제가 도서관 이용자에게 줄 수 있는 위험성과 해결책은 무엇인지에 대해서도 간단히 논의하였다. 본 연구는 도서관 프라이버시에 대한 초기단계의 연구로서 향후 국내 프라이버시 연구의 기초자료로 활용될 수 있기를 바란다.

• 천문학회지
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• 제52권5호
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• pp.207-216
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• 2019

In this paper we introduce a software package, the Very long baseline interferometry Network SIMulator (VNSIM), which provides an integrated platform assisting radio astronomers to design Very Long Baseline Interferometry (VLBI) experiments and evaluate the network performance, with a user-friendly interface. Though VNSIM is primarily motivated by the East Asia VLBI Network, it can also be used for other VLBI networks and generic interferometers. The software package not only integrates the functionality of plotting (u, v) coverage, scheduling the observation, and displaying the dirty and CLEAN images, but also adds new features including sensitivity calculations for a given VLBI network. VNSIM provides flexible interactions on both command line and graphical user interface and offers friendly support for log reports and database management. Multi-processing acceleration is also supported, enabling users to handle large survey data. To facilitate future developments and updates, all simulation functions are encapsulated in separate Python modules, allowing independent invoking and testing. In order to verify the performance of VNSIM, we performed simulations and compared the results with other simulation tools, showing good agreement.

• 교육시설 논문지
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• 제26권3호
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• pp.33-41
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• 2019

As the information age matures, the learning style of youth is changing rapidly. Students study at a variety of places such as cafe or lobbies utilizing various digital learning devices. Along with the place changes, learning methods are also changing. Student-centered learning methods such as smart learning, collaborative learning, and activity-based learning are increasingly being utilized instead of the traditional instructor-centered learning in which knowledge is unilaterally delivered. Accordingly, many universities are remodeling central libraries, and they are also transforming lobby spaces of the college buildings into simple but useful learning spaces. In this study, we analyze the characteristics of learning spaces in universities from the standpoint of the students. According to the analysis, overall satisfaction is high in terms of comfortable physical learning environments such as Wi-Fi, furniture, lighting, etc. But the spaces are still optimized for individual and intensive learning. There seems to be a lack of effort to support collaborative learning or activity-based learning. This observation is confirmed by the characteristics of the central library, and it is considered that the reason why the college buildings are preferred by students is that college buildings are more suitable for collaborative or activity-based learning than libraries.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권5호
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• pp.1708-1727
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• 2021

In the advent of the twenty-first century, human beings began to closely interact with technology. Today, technology is developing, and as a result, the world wide web (www) has a very important place on the Internet and the significant task is fulfilled by Web services. A lot of Web services are available on the Internet and, therefore, it is difficult to find matching Web services among the available Web services. The recommendation systems can help in fixing this problem. In this paper, our observation was based on the recommended method such as the collaborative filtering (CF) technique which faces some failure from the data sparsity and the cold-start problems. To overcome these problems, we first applied an ontology-based clustering and then the k-nearest neighbor (KNN) algorithm for each separate cluster group that effectively increased the data density using the past user interests. Then, user ratings were predicted based on the model-based approach, such as singular value decomposition (SVD) and the predictions used for the recommendation. The evaluation results showed that our proposed approach has a less prediction error rate with high accuracy after analyzing the existing recommendation methods.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제27권1호
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• pp.35-44
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• 2021

Purpose: To presenting basic data for the spatial composition required when planning the future department of rehabilitation medicine by analyzing the spatial composition of the location, size, area, and plan type of the rehabilitation department of the Regional Public Hospital. Methods: 3 Methods have been used in this paper. 1) Analyzing drawings to derive the net floor area of each room. 2) A literature survey about rehabilitation healthcare system. 3) Observation survey for user circulation analysis. Results: 1) Rehabilitation is an overall process of treatment that helps to play a role as an individual in society, away from the perspective of treating physical damage. The Department of Rehabilitation Medicine of the local medical center must provide rehabilitation medical services corresponding to the recovery and maintenance period for community rehabilitation. 2) The Department of Rehabilitation Medicine can be classified into diagnostics area, examination area, treatment area, management area, and interface area based on the rehabilitation treatment process. Implication: It can be used as basic data when planning related facilities by analyzing the characteristics of the space plan of the required room according to the relationship between activities, movement lines, and operation plans based on user behavior.

• 인지과학
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• 제19권4호
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• pp.331-367
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• 2008

웹 기반 신경심리검사의 타당도를 저해할 수 있는 요인들에 대한 해결책의 일환으로 검사 툴의 인터페이스 디자인을 개선하고자 세 단계를 거쳐 연구를 진행하였다. 연구 1은 곽호완의 웹 기반 신경심리검사 중 주의력 검사 툴의 UI 디자인 문제점을 파악하기 위한 것으로, 전문가에 의한 발견적 시찰법을 실시하였다. 그 결과, 이 검사 툴의 지시 화면, 조사 양식, 과제 화면, 결과 화면 등의 디자인에서 세부적인 사용성 문제점들이 드러났다. 연구 2는 찾아낸 사용성 문제점을 해결하기 위해 웹 기반 주의력 검사에 특화된 11개 디자인 가이드라인을 도출하였다. 이를 토대로 사용자의 작업 흐름에 맞추어 화면 구성과 사이트 구조 등을 최적화하고 재미 요소를 가미하여 검사 툴을 새롭게 디자인 한 다음, JAVA를 이용하여 프로토타입을 개발하였다. 이렇게 구현한 개선 툴(그래픽 툴)이 기존 툴(텍스트 툴)에 비해 더 효과적임을 검증하기 위해, 연구 3에서 사용자들을 대상으로 수행 측정과 설문 조사를 실시하여, 실수 유형과 출현비율 및 UI 만족도를 측정하였다. 수행 측정 결과, 그래픽 툴이 텍스트 툴에 비해 UI 디자인 문제들로 인해 발생하는 사용자 실수 유형과 출현비율이 유의하게 감소하였다. 사후 설문 조사 분석 결과, 텍스트 툴에 비해 그래픽 툴은 전반적인 만족도, 화면, 용어와 시스템 정보, 학습 용이성, 시스템 성능 등의 만족도 측면에서 우수한 것으로 입증되었다.