• Journal of Internet Computing and Services
• /
• v.25 no.1
• /
• pp.9-15
• /
• 2024

As virtual reality technology became popular, a high demand emerged for natural and efficient interaction with the virtual environment. Mid-air manipulation is one of the solutions to such needs, letting a user manipulate a virtual object in a 3D virtual space. In this paper, we focus on manipulating a remote virtual object while visually displaying the object and providing tactile information on the object's weight. We developed two types of wearable interfaces that can provide cutaneous or vibrotactile feedback on the virtual object weight to the user's fingertips. Human perception of the remote virtual object weight during manipulation was evaluated by conducting a psychophysics experiment. The results indicate a significant effect of haptic feedback on the perceived weight of the virtual object during manipulation.

• The Journal of Korean Association of Computer Education
• /
• v.20 no.6
• /
• pp.1-15
• /
• 2017

The purpose of this study is to design a LMS(Learning Management System) dashboard for instructor feedback support based on learning analytics and to apply a LMS dashboard incorporating such taxonomy which allows an instructor to give a student personalized feedback according to the class content and a student's traits. In the dashboard design phase, usable instructional data were selected from LMS based on feedback taxonomy in terms of learning analytics. Two validity tests were conducted with 8 instructional technologists over 8 years of experience, and were revised accordingly. The final dashboard screen has three parts: A comprehensive analysis screen to provide appropriate feedback based on instructor feedback taxonomy analysis, a summary screen for learner analysis, and a recommended feedback guide screen. Detailed analysis information are provided through other dashboards that are displayed in eight screens: login analysis, learning information confirmation analysis, teaching materials learning analysis, assignment/tests, and posts analysis. All of these dashboards were represented by analysis information and data based on learner analytics through visualization methods including graphs and tables. The implications of educational utilization of the dashboard for instructor feedback support based on learning analytics and the future researches were suggested based on these results.

• Proceedings of the Korean Information Science Society Conference
• /
• 2001.10b
• /
• pp.601-603
• /
• 2001

초고속 인터넷 망의 구축에 따라 정보통신 교육이 활성화에 힘입어 직.간접적으로 응용하기 위한 노력이 지속적으로 진행되어 왔다. 웹 기반 원격강의는 원거리 학습자들의 학습욕구를 자기 주도적인 학습이 되도록 전체적인 수업을 진행하므로 학습과정에서의 질의 응답을 교수자에게 면대면으로 제공하지 못하였다. 따라서 학습자가 요구한 질의 내용을 잘못 이해함에 따라 교수자가 학습과정에서의 피드백 제공을 하지 못함으로써 개인학습의 동기부여가 감소됨에 따라 흥미를 입게 되었다. 따라서, 본 논문에서는 웹 기반 서비스에 대한 체계적인 분석 및 설계를 위해 네비게이션 모델을 통해 질의 응답을 지원하는 QALT(Question Answer Learning Tool)를 설계 및 구현한다. 원격강의는 웹 상에서 기본적인 컨텐츠를 제시하고 그를 통해 수업이 진행되는 과정에서의 질의 응답의 문제점을 개선하기 위해 일다대(One-To-Many)의 서비스를 제공한다. 또한. 학습자는 교수자가 지정한 교육용 서버를 통해 텍스트 형식이 아닌 강의자료로 쓰인 문서파일에 직접 작성하여 질의 응답을 가능하게 된다. 그로 인해 교수자와 학생간의 질의 응답을 통해 상호작용을 원활하게 할 수 있는 보조학습도구로써의 사용이 증가될 것이다. 또한 서버에서의 폴더 서비스와 메일링 서비스를 통해 실시간 질의 응답이 가능함으로써 학습자는 강의파일에서 그림에 관한 질문에 효과를 볼 수 있고 교수자는 질문 받은 내용의 위치를 시각적으로 쉽게 볼 수 있으므로 빠른 응답이 가능하게 될 것이다.

• The Journal of the Korea Contents Association
• /
• v.18 no.8
• /
• pp.92-101
• /
• 2018

As the interactive AI speaker becomes popular, voice recognition is regarded as an important vehicle-driver interaction method in case of autonomous driving situation. The purpose of this study is to confirm whether multimodal interaction in which feedback is transmitted by auditory and visual mode of AI characters on screen is more effective in user experience optimization than auditory mode only. We performed the interaction tasks for the music selection and adjustment through the AI speaker while driving to the experiment participant and measured the information and system quality, presence, the perceived usefulness and ease of use, and the continuance intention. As a result of analysis, the multimodal effect of visual characters was not shown in most user experience factors, and the effect was not shown in the intention of continuous use. Rather, it was found that auditory single mode was more effective than multimodal in information quality factor. In the semi-autonomous driving stage, which requires driver 's cognitive effort, multimodal interaction is not effective in optimizing user experience as compared to single mode interaction.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2019.10a
• /
• pp.559-562
• /
• 2019

본 시스템은 4 차 산업 혁명이 발발한 이점을 살려 가상현실(Augmented Reality)을 활용, 극대화된 시각적인 요소들을 추가하여 사용자들의 흥미를 유발한다. 또한 더욱 정확한 평가 기준을 세우기 위해 사용자의 흉부 압박 빠르기와 깊이를 측정할 수 있는 각종 센서를 활용하였다. 관리자는 신뢰성 있는 데이터를 바탕으로 사용자들을 평가한다. 기존의 평가는 평가자의 눈대중, 직감으로만 평가가 이루어지기에 신빙성 및 신뢰를 하기 어렵다. 따라서 사용자들은 현실감 있고 정량화된 데이터를 바탕으로 정확한 평가 및 피드백을 받을 수 있는 교육, 평가가 절실히 필요하다. 따라서 본 논문에서는 가상현실을 활용한 심폐소생술(CPR) 및 자동 제세동기(AED) 교육 평가 시스템을 제안한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2018.10a
• /
• pp.438-440
• /
• 2018

Cardiac arrest is a series of conditions that occur when the heart is stopped, regardless of the cause. Cardiac arrest due to heart disease is included in the cause of death in korea every year and is unpredictable. One of the only ways to save a patient's life when a cardiac arrest is cardiopulmonary resuscitation is to maintain circulation through this procedure. The visual information is transmitted to the brain through the optic nerve. Among them, the mittor can see its movement and its shape, and it can be used for correction and analysis. Therefore compared the quality of chest compressions with visual information using mirrors. There was a significant difference in the mean depth of chest compressions($48.93{\pm}6.76$, $53.86{\pm}4.56$, <0.001), and there was also a difference in compression to relaxation ratio($0.87{\pm}0.13$, $0.96{\pm}0.10$, <0.002). There was also a significant difference in attitude awareness($4.93{\pm}0.85$, $8.14{\pm}1.38$, <0.001).

• Journal of Korea Society of Industrial Information Systems
• /
• v.25 no.3
• /
• pp.31-38
• /
• 2020

In this paper, we compare and analyze smart technologies and present six obstacle detection features to help visually impaired people walk. Traditionally, visually impaired people walk with the white cane or a guide dog. With the development of IoT technology, various smart walking aids systems have been developed. Those intelligent walking aids systems have obstacle-detecting systems and route-guidance systems. Many researchers are developing the walking aids system, which detects an obstacle and provides the obstacle information by haptic feedback. Also, they are designing the database server system to share the obstacle information. Particularly the composed system can quickly give an obstacle-avoidance route using shared obstacle information. Smart walking aids systems for visually impaired people will advance more rapidly by applying machine learning and intelligent systems.

• Proceedings of the Korean Information Science Society Conference
• /
• 2007.10b
• /
• pp.206-211
• /
• 2007

현대 그래픽스 장치의 발전은 수년전까지 Pre-Rendered 방식을 사용해서 볼 수 있었던 영상들을 Real-Time Rendering을 통해 실시간으로 인터렉티브하게 제공하고 있다. 이러한 장치의 발전은 게임, 시뮬레이션, 미디어 아트 등의 많은 분야에서 변화를 불러 일으켰으며, 앞으로도 많은 변화를 촉진시킬 것이다. 이러한 변화 중 하나로 기존까지 실시간으로 영상을 생성하기 힘들었던 분야 중의 하나인 미술 기법들의 실시간 재생이 가능해졌다. 본 논문은 미술 기법 중 판화기법과 탁본기법을 가상의 환경에서 모사할 수 있는 어플리케이션인 Virtual Engraving과 Virtual Frottage를 제안한다. Virtual Engraving은 3차원 공간상의 가상의 물체에 대해 3차원 입출력장치와 Bump Mapping을 이용하여 조각행위에 대한 경험을 사용자에게 제공하며, Virtual Frottage는 탁본의 대상을 영상으로 받아들여 영상 처리 기법과 Pixel Shader를 통한 렌더링을 통하여 사용자에게 흥미로운 프로타주 기법의 경험을 제공한다. 두 어플리케이션 모두 시각적인 정보를 통해 사용자에게 미술 기법의 경험을 제공하며, Virtual Engraving의 경우 3차원 입출력장치를 통해 촉각적인 정보를 제공하였고 Virtual Frottage 역시 촉각 피드백을 제공할 수 있도록 연구 중이다. 이러한 미술 기법의 모사 연구는 사용자에게 보다 더 실감적인 경험뿐만 아니라 실 공간에서는 가능하지 않은 여러 효과를 제공할 수 있다.

• Journal of Korea Game Society
• /
• v.4 no.2
• /
• pp.21-28
• /
• 2004

Experience of human is more impressive when it is combined with physical interaction which provides multi-dimensional information including touching on body sense systems as well as seeing and hearing. In the Held of games, concentrations and satisfactions obtained from playing games are more effective when feedbacks come totally on whole body sense systems. In this paper, we have studied physical interactive systems with analysis on traditional physical interactive systems in on-line game area which normally were depending on seeing and hearing senses.

• Journal of Internet Computing and Services
• /
• v.17 no.4
• /
• pp.161-172
• /
• 2016

The following research investigates core factors required for IT professionals to achieve and remain happy on their jobs through dynamic and structural CLD and suggests personal, organizational, and government level (happiness) promoting factors. Researcher adopted the system dynamics methodology which is qualitative research techniques pursue behavior probability by using CLD. It spotlights 6 CLD: job satisfaction, organizational commitment, positive sensitivity, negative sensitivity, amicable relationship, job sustainment intention, in addition to numerous factors that affect them from an integrative perspective. It differentiates itself from one-way relationship focused qualitative research to an advanced mutual and realistic perspective exploratory research.