3D GUI 의 깊이감 지각에 영향을 미치는 시각적 요인 분석 및 사용성 평가

윤재화(Jaehwa Yoon),조광수(Kwangsu Cho) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2

본 논문에서는 3D GUI 에서 사용자의 깊이감 형성에 영향을 미치는 시각적 요인을 인지반응 및 안구운동데이터를 통하여 분석한다. 또한, 각각의 시각적 요인에 대한 사용성 및 심미성 평가를 실시하여 시각적 깊이감을 형성하는 요소가 3D GUI 설계시 갖는 효용성에 대해 연구하고자한다. 이를 위해 실험 1 에서는 각 실험 조건에 따라 정성적 평가와 정량적 평가를 동시에 실시하여 깊이감을 형성하는 시각적 요소별 차이를 분석하였고, 실험 2 에서는 각 실험 자극에 따른 선호도와 사용성 및 심미성평가를 실시하여 요소별 차이에 대해 연구하였다. 본 연구는 추후 3D GUI 디자인가이드라인 구축 연구에 대한 시사점을 제공한다. In this paper, we analyze the visual factors affecting the user"s depth sense formation through 3D cognitive response and eye movement data. In addition, we will investigate the usefulness of 3D GUI designing elements in visual usability and aesthetic evaluation for each visual factor. In Experiment 1, qualitative evaluation and quantitative evaluation were performed at the same time according to each experimental condition. In Experiment 2, preference, usability and aesthetic evaluation were performed according to each experimental stimulus, The differences were studied. This study provides implications for future research on building 3D GUI design guidelines.

Characteristics of Patch Type Smart-Piezo-Sensor for Smart Structures

Yoon, Dong Jin,Lee, Sang Il,Kwon, Jaehwa,Lee, Young Sup Trans Tech Publications, Ltd. 2005 Key Engineering Materials Vol.297 No.-

<P>Structural health monitoring (SHM) is a new technology that has been increasingly evaluated by the industry as a potential approach to improve the cost and ease of structural inspection. Piezoelectric smart active layer (SAL) sensor was fabricated to verify the applicability of finding cracks and conducting source location in a various materials. A crack detection and source location works were done in three kinds of test condition such as aluminum plates with crack for patch type SAL sensor, a smart airplane with embedding SAL sensor, and a concrete beam with real crack for practical application. From this experimental study, the evaluation algorithm for the arrival time delay and decrease of signal amplitude was suggested in this paper. Consequently, it was found that the SAL sensor and detection algorithm developed in this study can be effectively used to detect and monitor damages in the both existing structures and new designed smart structures.</P>

비전 시스템을 활용한 인터랙티브 아트의 간학제적 연구

김재화(Jaehwa Kim),윤준성(Joonsung Yoon) 한국HCI학회 2007 한국HCI학회 학술대회 Vol.2007 No.2

다양한 크기와 모양의 타일을 이용한 콜라주 생성 기술

이재화(Jaehwa Lee),윤경현(KyungHyun Yoon) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1

A collage which represents objects by attaching tiles with various shape, size, and material on canvas is one of typical decorative arts. In computer graphics, the collage has been a research topic of non-photorealistic rendering. In these studies, the collage assembled tiles with uniform size and shape. On the contrary, we suggest the method that generates collage using various sized and shaped tiles. The size of tiles in collage is closely related with representative detail. In order to represent the detail and use various sized tiles, tile location is most important than others. In this study, we locate larger tiles first, so that various sized tiles are evenly used. We reduce the overlap between tiles by size-based tile locating method. 다양한 모양, 크기, 재질의 타일들을 캔버스 위에 붙여 대상을 표현하는 기법인 콜라주는 대표적인 장식 미술의 한 종류이다. 콜라주는 대상을 예술적으로 표현하거나 흉내 내는 기술인 컴퓨터 그래픽스의 비사실적 렌더링 분야에서 오랫동안 연구주제로 다루어져 왔는데, 대부분 일정한 크기, 모양의 타일들을 이용한 모자이크 형태의 콜라주가 주를 이루었다. 본 연구에서는 타일의 크기 및 모양을 다양하게 사용하여 콜라주를 생성하는 방법을 제안한다. 콜라주에 사용된 타일의 크기는 표현의 디테일과 밀접한 관련이 있다. 따라서 다양한 크기의 타일들을 동시에 사용하면서, 디테일 또한 잘 표현하기 위해서는 어떤 크기의 타일을 어디에 위치시킬 것인지가 매우 중요하다. 본 연구에서는 타일의 크기 순서로 주어진 캔버스를 채워나감으로써 이를 해결하고자 한다. 우리는 타일 크기에 기반으로 한 타일 위치 선정 방법을 이용하여 타일 간의 겹침을 줄이고, 에지를 회피하도록 타일을 위치시켰다.

Understanding the Formation of User’s First Impression on an Interface Design from a Neurophysiological Perspective – EEG Pilot Study

Nahye Kim,Bonseung Koo,Jaehwa Yoon,Kwangsu Cho 한국HCI학회 2016 한국HCI학회 학술대회 Vol.2016 No.1

Although traditional UX evaluation methods have focused on the experience users undergo when they actually use a service or product, the first impression that users obtain before actually using it is also an important factor to take into consideration. Previous studies have found that users form the first impression about an interface design in just a few seconds and quickly decide on whether to stay on or leave the interface. Furthermore, the first impression that is formed at the moment that users face the interface influences subsequent decisions they make, having impact on their task performance and preferences later on. Regarding such a significant role of the first impression, the current research suggests a brain based measurement method, EEG, as a solution to measure the first impression of users. Specifically, with EEG as an experimental method, this study aims at judging user’s first impression on an interface and understanding the underlying neural mechanisms for the process by which the first impressions are formed.

An Active Piezo Array Sensor for Elastic Wave Detection

Lee, Young Sup,Yoon, Dong Jin,Lee, Sang Il,Kwon, Jaehwa Trans Tech Publications, Ltd. 2005 Key Engineering Materials Vol.297 No.-

<P>This paper describes an array sensor of piezoceramic PZT discs with flexible covering layers, which is designed to detect surface elastic waves in structures, such as Rayleigh waves. The sensor is distinguished from conventional “passive” sensors for elastic waves detection because it possesses an ability to actuate an “active” pulse. This indicates that the function of active pulse generation ensures the diagnosis of the structures, where the sensor attached or embedded into, can be accomplished in a smart way including an easy inspection of faults. Actually the sensor has been inspired from human sensory systems in order to apply for smart structure sensing. They utilized 6mm diameter and 0.25mm thick PZT discs for the active array sensor. The performance of the sensor was demonstrated at various experiments of some metal and composite structures that the sensor can be applied for the health monitoring of the advanced smart structure system. </P>

근접장 정보저장 시스템 광헤드의 오차 분석 및 공차 할당

이준희(Jun-Hee Lee),정재화(Jaehwa Jeong),윤형길(Hyung Kil Yoon),권대갑(Dae-Gab Gewon),김완두(Wan-Doo Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11

Error analysis and tolerance allocation method for the optical head of Near-Filed Recording (NFR) system are presented. After design and fabrication of NFR system, the performance test for the NFR system is done. Using the optical simulation program, CODEV, the assembly and manufacturing tolerances of the NFR optical head are simulated. The tolerances analysis result shows that the tolerance is very tight. So we propose optimal compound tolerance allocation method using WOW (worst on worst) analysis, RSS (root sum square) analysis and Monte-Carlo analysis.

Biologically Inspired Smart Sensor for Acoustic Emission Detection

Lee, Young Sup,Im, Hyoung Jin,Kwon, Jaehwa,Yoon, Dong Jin Trans Tech Publications, Ltd. 2006 Key Engineering Materials Vol.321 No.-

<P>This paper presents concept, analysis and experiment of a novel sensor which is based on biologically inspired approach for acoustic emission (AE) detection. It is known that a conventional AE sensor consists of a matching layer, piezoelectric transducer, backing layer, supporting electric circuit and casing. The conventional AE sensors have been widely used to detect defects in various structures and they have designed as either broadband or resonant type. However, the novel sensor described in this paper utilizes the concept of hearing organs in animals with the help of micro electro-mechanical systems (MEMS) technology. The basic design with theoretical investigation including finite element analysis showed the core hearing element such as a hair cell could be implemented with the piezoeletric material. Also it is found that the dimensional variety and proper distribution of such elements inside the sensor are critical parameters to the detectability of AE signals from structures. Both the broadband and resonant type AE sensors with relevant electric circuits could be implemented with this novel sensor concept.</P>

Correlation analysis between regional carbon monoxide and black carbon from satellite measurements

Mok, Jungbin,Park, Sang Seo,Lim, Hyunkwang,Kim, Jhoon,Edwards, David P.,Lee, Jaehwa,Yoon, Jongmin,Lee, Yun Gon,Koo, Ja-Ho Elsevier 2017 Atmospheric research Vol.196 No.-

<P><B>Abstract</B></P> <P>In this study, we present and compare regional correlations between CO total column density (TCD<SUB>CO</SUB>) from the data set of Measurement of Pollution in the Troposphere (MOPITT), and high-absorbing BC dominant aerosol optical depth (AOD<SUB>BC</SUB>) from the retrieval algorithm using Moderate Resolution Imaging Spectroradiometer (MODIS) and Ozone Monitoring Instrument (OMI) (MODIS-OMI algorithm, MOA). TCD<SUB>CO</SUB> shows positive relationship to both fine-mode AOD (AOD<SUB>FM</SUB>) and AOD<SUB>BC</SUB> in general, but TCD<SUB>CO</SUB> better correlates with AOD<SUB>BC</SUB> than AOD<SUB>FM</SUB>. This enhanced correlation between TCD<SUB>CO</SUB> and AOD<SUB>BC</SUB> appears more clearly during spring and summer. Correlation between TCD<SUB>CO</SUB> and AOD<SUB>BC</SUB> is exceptionally poor in Northern Africa where the BC-dominated aerosols are frequently mixed with mineral dust particles from the Sahara. Another issue is also found in Southern Africa; the correlation between AOD<SUB>BC</SUB> and TCD<SUB>CO</SUB> in this region is not much higher than that between the AOD<SUB>FM</SUB> and TCD<SUB>CO</SUB> in spite of large occurrence of biomass burning and wildfire. This can be explained by the cloud perturbation near the source regions and dispersion effect due to the typical wind pattern. Correlations between AOD<SUB>BC</SUB> and TCD<SUB>CO</SUB> increase further when fire detected areas are only considered, but does not change much over the urban area. This difference clarifies the large contribution of burning events to the positive relationship between BC and CO. All findings in this study demonstrate a possible use of satellite CO product in evaluating the BC-dominated aerosol product from satellite remote sensing over the globe.</P> <P><B>Highlights</B></P> <P> <UL> <LI> BC dominant AOD from MODIS-OMI observations shows good correlations with MOPITT CO. </LI> <LI> BC-CO correlation can be perturbed by the regional transport and cloud distribution. </LI> <LI> BC-CO correlation largely increases when only considering fire detected area. </LI> </UL> </P>