• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.803-809
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• 2006

이 연구는 인터넷 소설을 읽을 때 사용자의 참여도에 따라 그 내용의 이해도가 어떻게 영향을 받는지 알아 보고자 한다. 현재 인터넷 소설은 소설의 양식이 인쇄매체에서 인터넷 매체로 옮겨졌음에도 불구하고 인터넷이라는 매체의 특성을 활용하지 못하고 있다. 인터넷 매체의 여러 특징들 가운데 상호작용성은 인쇄매체에서 인터넷 매체로의 전환을 이룬 다른 장르에서 주요 특징으로 고려되고 있다. 이것은 디지털 스토리텔링에서 사용자의 활동(action)에 관한 부분으로 활동적인(active) 사용자의 참여를 말한다(이 연구에서는 상호작용성을 사용자가 매체에 활동을 통한 개입, 사용자 참여도로 조작적 정의를 내린다). 또한 모니터를 통한 글 읽기는 인쇄매체에 비해 가독성이 떨어지고 훑어보는 글읽기(scanning)가 이루어지기 때문에 내용을 이해하는 데 어려움이 따른다. 인터넷 매체의 특성을 살리면서 글에 대한 이해도를 높이기 위해 사용자의 참여도를 독립변인으로 글의 이해에 미치는 영향을 알아보고자 했다. 실험 1에서는 기존의 단편 추리 소설을 이용해 사용자의 글읽기 과정에서 범인추측의 정도에 차이를 주어 참여도에 변화를 주었다. 그 결과 사용자의 참여도에 따라 이해의 정도가 유의미함을 보였다. 이는 사용자의 참여도가 이해에 영향을 미친다는 기존 연구를 뒷받침하며 인터넷 소설에서 인터넷 매체의 특성을 살린 글의 기재가 글의 이해에 도움이 된다는 것을 말해준다. 실험 2에서는 실험 1과 같은 추리 소설을 이용하되 사용자의 참여도에 따라 소설 내용의 변화를 주었다. 실험 2의 결과 내용 변화에 따른 이해도의 차이는 나타나지 않았으나 자신이 선택하지 않은 경로로의 이야기 내용에 궁금증을 보고하며 글의 전체 내용에 관한 관심을 보였다. 이는 사용자의 참여가 글의 이해뿐만 아니라 흥미유발에도 영향을 미친다는 가능성을 보여주므로 상호작용적인 글읽기와 흥미유발에 관한 추후연구가 필요함을 시사한다. 이 연구는 또한 기존의 인터렉티브 스토리텔링 연구가 현 상황에 대한 보고와 구현된 시스템의 사용성 평가에 국한된 것에 반해 실험 연구로의 변화를 꾀하였다는 것에 의의를 둘 수 있다.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.635-638
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• 2008

Unlike traditional analog broadcasting, digital broadcasting provides users with various additional services that we have never seen before. To receive these kind of services. data broadcasting includes not only audio, video signal, but also additional data associated with the program. In this paper, we present the efficient parsing and caching mechianism for data carousel in digital broadcasting set-top box. In order to speed up the process of parsing, we use the Message Pool that stores elementary_pid syntax of DSM-CC message packets.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.436-442
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• 2009

Tomography images reconstructed from conebeam CT make it possible to observe inside of the projected object without any damage, and so it has been widely used in the industrial and medical fields. Recent advanced imaging equipment can produce high-resolution CT images. However, it takes much time to reconstruct the obtained large dataset. To reduce the time to reconstruct CT images, we propose an accelerating method using GPU (graphics processing unit). Reconstruction consists of mainly two parts, filtering and back-projection. In filtering phase, we applied 4ch image compression method and in back-projection phase, computation reduction method using depth test is applied. The experimental results show that the proposed method accelerates the speed 50 times than the CPU-based program optimized with OpenMP by utilizing the high-computing power of parallelized GPU.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.518-523
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• 2006

As digital broadcasting process and information compressing technologies developed, digital technologies have been used extensively in many visual media such as movies and TV programs, and it is required to develop a new process for 3 dimensional digital programs. The study attempts to develop a new digital video-producing process through pre-simulation using a digital storytelling method, in order to increase the quality of broadcasting, reducing the producing time and improve efficiency. This system, supposed to be used to produce actual broadcasting, includes all tools needed for broadcasting in the program, so users can select an appropriate set among the pre-made library, which saves time for making sets. Also, it offers a storyboard making function by perfectly representing the functions of a virtual camera, and enables users to make the better storyboard, checking the real time movies. In addition, it recognizes objects though avatars, organizes the appropriate set for these avatars to act, and embodies a variety of avatar movements through which it reaffirms the camera's position and organization, minimizing errors and saving time and budget.

• Proceedings of the IEEK Conference
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• 2000.11a
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• pp.57-60
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• 2000

In this paper, we describe the implementation of Bluetooth headset. Bluetooth headset sets up link using ACL connection between headset and audio gateway, transfers 64kbps voice using SCO connection. Bluetooth headset implemented in this paper is designed with no HCI, so all protocol stack is implemented in Bluetooth module. We verify the upper layer protocol and application program using C-language modeling on Unix environment.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.139-144
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• 2010

In this study, we have propose an english, math education program to the children of elementary school and Single Display Groupware (SDG) technique was applied to implement the program. By SDG-based program, learners will be performed at the same time learning cooperatively. Finally, we have implement a prototype of SDG system and take a usability test with elementary school children.

• Journal of the HCI Society of Korea
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• v.12 no.4
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• pp.65-73
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• 2017

While electricity demand is generally increasing, stably controlling supply is becoming a serious challenge because renewable energies are becoming popular and often their productions are dependent on the weather. The 'demand response' programs can be used to complement the problems of renewable energies, and therefore their role is becoming increasingly important. This study provides an analysis of a demand response pilot that was conducted in Korea. The study first focused on questionnaire surveys and in-depth interviews, and the data was used to perform a Technology Acceptance Model (TAM) analysis. The goal of the pilot was to have the residential users reduce their power consumptions when an energy reduction mission is issued during peak load hours. The experimental subjects consisted of two groups with different characteristics. Subjects in group A obtained smart meters as an optional function of IoT platform service provided by a mobile service company, and received a charge deduction as their compensation. Subjects in group B either voluntarily purchased smart meters as individuals or received them by participating in an energy self-sufficient village program that was run by a local government, and were entitled to a donation as their compensation. With the analysis, group A was found to fit the extended technology acceptance model that includes perceived playfulness in addition to perceived ease of use and perceived usefulness. On the contrary, group B failed to fit the model well, but perceived usefulness was found to be relatively more important compared to group A. The results indicate that the residential energy groups' behavior changes are dependent on each group's characteristics, and group-specific DR design should be considered to improve the effectiveness of DR.

• Journal of the HCI Society of Korea
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• v.12 no.4
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• pp.27-35
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• 2017

This study aims to investigate the influence of engagement of augmented reality game on immersion. The relationship between engagement and flow was examined through the mediating effects of emotional attachment and focus of attention on presence and the mediating effects of presence on flow. In order to verify the research hypothesis, online questionnaire was conducted with the consent of $Pok\acute{e}mon$ Go game user group. The questionnaire items were translated from the Augmented Reality Immersion Questionnaire. A total of 200 questionnaires were collected and used for analysis. Using the SPSS 23.0 program and the Mplus 7.0 program, the reliability of the scale was confirmed through the Cronbach's coefficient and the causal relationship and the mediating effects were verified by path analysis. As a result, there was no direct causal relationship between engagement and flow. However, causal relationship was evident when emotional attachment and focus of attention were mediated in the process of engagement in augmented reality game. In conclusion, systematic explanations of participant's emotional attachment and attentional state as a main factor in the process of participating in the augmented reality game involvement, reveal the elements to be noticed by the augmented reality game.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.6
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• pp.125-130
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• 2010

Cooperative learning is a successful teaching strategy in which small teams, each with students of different levels of ability, use a variety of learning activities to improve their understanding of a subject. Each member of a team is responsible not only for learning what is taught but also for helping teammates learn, thus creating an atmosphere of achievement. In this study, we have propose an english, math education program to the children of elementary school and cooperative learning program technique was applied to implement the program. By cooperative learning program, learners will be performed at the same time learning cooperatively. Finally, we have implement a prototype of cooperative learning program and take a usability test with elementary school children. A complementary team to score and mixed was found to be most effective.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.33-39
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• 2006

Home modification has come to be recognized as an important intervention strategy to manage health care conditions, maintain or improve functioning, ensure safety, and reduce the wheelchair user's dependency on others. However, the availability of skilled professionals with experience in home modifications for accessibility is limited. A system that enables accurate remote assessments would be an important tool to improve our ability to perform home assessments more easily and at decreased cost. A Remote Wheelchair Accessibility Assessment System (RWAAS) using Virtualized Reality(VR) technology was developed that enabled clinicians to assess the wheelchair accessibility of users' built environments from a remote location. Characteristics of the camera and 3D reconstruction program chosen for the system significantly affect its overall reliability. In this study, we performed two reliability analyses on the hardware and software components: 1) Verification that commercial software can construct sufficiently accurate 3D models by analyzing the accuracy of dimensional measurements in a virtualized environment; 2) comparison of dimensional measurements with four camera settings. Based on these two analyses, we were able to specify a consumer level digital camera and the Photomodeler Pro software for this system. And we then tested the feasibility of the selected software and hardware in an actual environment. Lastly, A field evaluation was performed to test whether this new system is comparable to the traditional method of accessibility assessment to evaluate its ability to assess the accessibility of a wheelchair user's typical built environment. The results of field trials showed high congruence between the assessments by two methods. Findings suggested that the RWAAS assessments have the potential to enable specialists to assess potential accessibility problems in built environments regardless of the location of the client, home, or specialist.