• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.497-501
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• 2009

'Digilog Book' integrates advantages of existing paper book and immersive digital contents in augmented reality environment, which enables users to feel physical touch and get additional multisensory feedback. As a high level authoring user interface, 'ARtalet' provides an intuitive way to make Digilog Book through 3D user interface in augmented reality environment. This paper mentions trajectory inserting and editing methods of 3D objects, then combining method of the trajectory. 3D object is selected by camera tracked prop, and then transformation matrix relative to book plane is stored in real time based on timeframe. The saved trajectory is managed as templates, and user can make various compositions of trajectories. We expect that suggested methods can enhance interest of readers.

• Journal of Digital Convergence
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• v.14 no.10
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• pp.1-8
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• 2016

Coding education is an effective convergence type educational tool. While solving problems and designing programs, students can enhance problem solving ability, logical reasoning ability and creative thinking. Researches on coding education are done primarily for elementary school and middle school students. However, researches on college students are lacking. Today, educating college students about coding is in dire need. Although there are efforts to promote the importance of coding education and make it requirements. People find it difficult to find ways to provide training. There is a need for researches on coding as universal education. Therefore, this research proposed educational training using app inventor based on flipped running in order to effectively promote coding education. This study conducted the survey and the personal interview to measure the effectiveness of coding education. It is hoped that, through coding education, students who do not major in coding could combined their knowledge of their major with coding to improve their problem solving ability to solve various problems based on computing knowledge and approach.

• KIPS Transactions on Software and Data Engineering
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• v.11 no.2
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• pp.101-106
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• 2022

Recently, virtual human has been widely used in various fields such as education, training, information guide. In addition, it is expected to be applied to services that interact with remote users in metaverse. In this paper, we propose a novel method to make a virtual human' interaction to perceive the user's surroundings. We use the editing authoring tool to apply user's interaction for providing the virtual human's response. The virtual human can recognize users' situations based on fuzzy, present optimal response to users. With our interaction method by context awareness to address our paper, the virtual human can provide interaction suitable for the surrounding environment based on automatic adaptation.

• Journal of the Korea Convergence Society
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• v.9 no.8
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• pp.247-264
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• 2018

The purpose of this study was to establish the concept of self - management in university athletes through two integrated research methods as an open-ended questionnaire and focus group interview. Data collection was conducted with open questionnaire for 157 athletes attending in Seoul Gyeonggi-do university and the 14 university athletes were collected data by focus group interview. Results from a series of research procedures are as follow. First, the result of open-ended questionnaire's inductive content analysis, university athletes' self management included 8 general sectors such as life management, training management, competitive management, emotion management, study management, interpersonal management, goal(motivation) management, equipment management. Second, in the focus group interview results, inductive content analysis was more properly supported, and interviews focused on sports field were deeply derived. The results of this study will be used as a basic data to establish strategies for successful athletes' life and develop to university athletes' self management.

• Convergence Security Journal
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• v.12 no.1
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• pp.27-33
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• 2012

VANET(Vehicular Ad-hoc Network) is a kind of ad hoc networks consist of intelligence vehicular ad nodes, and has become a hot emerging research project in many fields. It provide traffic safety, cooperative driving and etc. but has also some security problems that can be occurred in general ad hoc networks. Also, in VANET, vehiculars sho uld be able to authenticate each other to securely communicate with network-based infrastructure, and their location s and identifiers should not be exposed from the communication messages. This paper explains V2I authentication pr otocol using a hash function that preserves the user privacy. In addition, we analyze the security stability of the V2I authentication protocol using Casper in the formal verification technique. As a result, V2I authentication protocol us ing hash function prove a stability.

• Proceedings of the Korea Contents Association Conference
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• 2011.05a
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• pp.395-396
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• 2011

과체중, 비만을 포함한 만성질환은 일회성의 치료행위보다는 지속적인 관리가 필요한 질환이다. 이러한 점을 고려하여 개발된 IT서비스와 Healthcare서비스의 융합형 체중관리 모바일 어플리케이션 사용이 늘고 있는 추세다. 그러나 대부분의 체중관리 어플리케이션에서는 식단정보와 운동 칼로리 소모량에 관한 정보를 일방적으로 제공하고 있을 뿐, 사용자 건강의 질적인 부분을 고려하지는 못하고 있다. 따라서 본 연구에서는 어플리케이션 사용자들에게 지속적으로 동기를 부여하는 방안들을 모색하고 사용자 건강의 질도 관리 할 수 있도록 고려하여 모바일 체중관리 어플리케이션을 개발하였다. 이를 위하여 사용자 건강의 위험도를 Framingham risk score를 이용하여 지속적으로 점검하고 관리할 수 있도록 하였다. 또한 건강과 관련 된 삶의 질(HRQOL) 측정도구를 포함하여 사용자가 건강상태를 지속적으로 평가, 관리할 수 있도록 개발하였다. 본 연구를 통해 개발된 체중관리 어플리케이션은 사용자는 식이, 칼로리 뿐 만이 아니라 개인의 건강의 질에 관한 관리를 지원하고, 나아가 일회성이 아닌 지속적인 건강관리 서비스를 제공할 것으로 기대한다.

• Journal of the Korea Convergence Society
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• v.9 no.6
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• pp.271-277
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• 2018

The aim of this study was to select useful items for assessing fall risk in community-dwelling elderly. This study assumed five fall risk factors: Symptoms of falling, physical function, disease and physical symptoms, environment, and behavior and character based on previous studies. The questionnaire consisted of 44 items according to the contents validation, crossover analysis and factor analysis. The Korean version of the Fall Risk Assessment Scale (FRA-K) will be used as a useful tool to improve the fall problems perceived to be serious social problems and to provide important information for prevention of falls.

• Journal of Convergence for Information Technology
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• v.9 no.9
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• pp.158-165
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• 2019

Through the use of speech software technology, this paper examines the effects of voice interactions within the inner circle of English. The fundamental frequency (F0) was obtained by analyzing native speakers (aged 30-55) speech effects based on nationality, age, and gender. The findings within this study reveal that the Caucasian British female (age 33) and the Caucasian American male (age 55) produced the most interactive speech. The contributing factor is the students' experience with various language styles throughout their language acquisition studies. The results of this study are compatible with $Traunm{\ddot{u}}eller$ & Eriksson (1995) and previous studies which agree that continuous speech above average is paramount towards student engagement and interactions.

• Convergence Security Journal
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• v.18 no.3
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• pp.27-35
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• 2018

The certificate is electronic information issued by an accredited certification body to certify an individual or to prevent forgery and alteration between communications. Certified certificates are stored in PCs and smart phones in the form of encrypted files and are used to prove individuals when using Internet banking and smart banking services. Among the rapidly growing Android-based malicious applications are malicious apps that leak personal information, especially certificates that exist in the form of files. This paper proposes a method for judging whether malicious codes leak certificates by using DroidBox, an Android-based dynamic analysis tool.

• Journal of the Korea Convergence Society
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• v.7 no.6
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• pp.99-104
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• 2016

This study is a nonequivalent control group pretest-posttest design to verify the effect of music listening on convergent job stress of experimental group of 40 who are listening to music 10 times and control group of 40 who are taking a rest in fire-fighters. Homogeneity test and distribution of high risk and low risk were analyzed using Chi-test and the effect of listening to music on job stress was analyzed using t-test with SPSS 22.0 program. The experimental group showed a decreased job stress more significantly than the control group. Therefore, job stress intervention program should be developed and practical and systematical approach to reduce the job stress using music listening aggressively should be prepared in the future based on this study's result.