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Jehwan Hwang,Jiyeon Jeon,Sujin Yoon,Byung Soo Kang,Deok-Kee Kim,Ha Sul Kim,Sang-Woo Kang,Jun Oh Kim,Woo-Yong Jang,Urbas, Augustine,Zahyun Ku,Sang Jun Lee IET 2015 Electronics letters Vol.51 No.15
<P>In previous work, the present authors discovered the resonant splitting phenomenon of a plasmonic perforated gold film (PGF), as the incident light comes in the polar angle. However, in reality, the light through the imaging lens could be incident on the PGF not only in the polar angle but also in the azimuth angle. The transmission of a PGF against the incident light is analysed in both polar and azimuth angles in spherical coordinates. To mimic the incidence through the lens, a PGF sample is rotated by simultaneously varying both types of angles as normal incidence arrives. For the measurement, the sample has been fabricated with a PGF on a semi-insulating gallium arsenide (GaAs) substrate. The measured transmission spectra show both resonant splitting and merging under TM and TE polarisations as the azimuth angle is increased. Results drawn from this work will pave the way to fully understanding the interaction between the imaging lens and the plasmonic structure (PGF).</P>
The Prevalence and Characteristics of Depression in Work-related Musculoskeletal Disease
Jehwan Kwak,Hyung Kuk Kim,Taikon Kim,장성호,이규훈,김미정,박시복,한승훈 대한재활의학회 2012 Annals of Rehabilitation Medicine Vol.36 No.6
Objective To reveal the relationship between depression and WMSD.Method Five physiatrists participated in the workplace musculoskeletal survey and diagnosed 724 office workers with WMSD by performing detailed history taking and physical examination. All subjects were asked to answer the Korean version of the Beck depressive inventory (K-BDI), and to express their pain according to the visual analogue scale (VAS) score. We categorized the subjects into 4 groups, myofascial pain syndrome (MPS), herniated intervertebral disk (HIVD), tenosynovitis, and others, and investigated the prevalence of depression in desk workers and relationship between WMSD and depression, and we compared pain intensity between the depression and non-depression groups. Correlation analysis was carried out between K-BDI and VAS scores in each group.Results The mean K-BDI score were 8.7±6.68. The prevalence of depression was higher in females than in male, and there was no relationship between age and depression. There was a significant connection between HIVD and depression (p<0.05). However, the other groups did not have significant connection to depression. The VAS score (5.02) of the depression group was significantly higher than that (4.10) of the non-depression group. In addition, there was a significant difference of VAS scores between the depression group and non-depression group in each disease group.Conclusion The mean VAS score of the depression group in WMSD was significantly higher than in the non-depression group. The correlation between BDI and VAS scores in the subjects was present, and the highest was in the HIVD group.
서제환(Jehwan Seo) 한국HCI학회 2016 한국HCI학회 학술대회 Vol.2016 No.1
지금까지 스마트 홈의 발전은 기술 중심으로 이뤄져 왔다. 즉 스마트 홈의 목적은 가정 내 전자기기를 인터넷으로 연결하고 사용자가 그것들을 컨트롤 할 수 있는 Eco system 을 만드는 것이었다. 본 논문에서는 기술 측면이 아닌 사용자 행동 조사를 통해 스마트 홈의 발전 방향을 알아보려 한다. 특정 타겟층(직장인)의 특정시간대(기상 후 출근 전까지) 활동을 조사하면서 발견된 특징적인 활동을 통해 인사이트를 도출하려 하였다. 인터뷰와 인터뷰 사전조사 자료를 토대로 직장인들의 아침 활동의 패턴을 파악하였다. 직장인들의 아침 활동은 반복적이고 규칙적이며 1)대부분의 행동들은 Cognitive load 가 많이 걸리는 의식적 행동보다는 몸에 익숙하여 자동적으로 행해지는 행동들로 이뤄져 있음을 확인하였다. 또한 2)Single, Non-single type 의 사용자들의 아침 활동 패턴은 차이가 없음을 확인하였고, 이는 직장인들의 아침 활동 패턴은 매우 일상적이며 시간을 타이트하게 사용하기 때문이라는 것을 알 수 있었다. 3)아침 활동 중에 정보기기 사용의 목적은 기상을 위한 알람 기능의 사용과 밤 사이 도착한 메시지 및 메일, 최신 SNS 정보 및 뉴스 그리고 날씨 정보를 얻고자 하는 것임을 알 수 있었다. 4)이는 사용자들의 아침 활동 중에 발생하는 정보 습득 욕구는 스마트폰에 의존하는 경향이 있음을 알 수 있었고, 우회적으로 라디오 or TV or 함께 거주하는 사람들을 통해서 정보를 얻는 Case 로 발견할 수 있었다. 본 논문에서 발견한 사실을 토대로 앞으로의 스마트 홈의 발전 방향은 집안의 전자 기기들을 컨트롤하는 측면이 아니라 특정 타겟층의 특전시간대의 생활 패턴 분석 기반이 되어야 함이라 주장할 수 있다. In this paper, we research the development direction of smart home, not based on the technology but on the user behavior research. We pulled out the insight by finding regular or specific behavior patterns of office workers’ morning; from waking up till going to work. The experiment shows that office workers’ morning behaviors were very routine and familiar. From the discovered facts of this paper, we found that the development direction of smart home is rather than approaching from technical side for controlling electronic devices at home but it is more about analyzing life patterns of target users’ targeted time of the day.
The Prevalence and Characteristics of Depression in Work-related Musculoskeletal Disease
Kwak, Jehwan,Kim, Hyung Kuk,Kim, Taikon,Jang, Seong-Ho,Lee, Kyu Hoon,Kim, Mi Jung,Park, Si-Bog,Han, Seung Hoon Korean Academy of Rehabilitation Medicine 2012 Annals of Rehabilitation Medicine Vol.36 No.6
<P><B>Objective</B></P><P>To reveal the relationship between depression and WMSD.</P><P><B>Method</B></P><P>Five physiatrists participated in the workplace musculoskeletal survey and diagnosed 724 office workers with WMSD by performing detailed history taking and physical examination. All subjects were asked to answer the Korean version of the Beck depressive inventory (K-BDI), and to express their pain according to the visual analogue scale (VAS) score. We categorized the subjects into 4 groups, myofascial pain syndrome (MPS), herniated intervertebral disk (HIVD), tenosynovitis, and others, and investigated the prevalence of depression in desk workers and relationship between WMSD and depression, and we compared pain intensity between the depression and non-depression groups. Correlation analysis was carried out between K-BDI and VAS scores in each group.</P><P><B>Results</B></P><P>The mean K-BDI score were 8.7±6.68. The prevalence of depression was higher in females than in male, and there was no relationship between age and depression. There was a significant connection between HIVD and depression (p<0.05). However, the other groups did not have significant connection to depression. The VAS score (5.02) of the depression group was significantly higher than that (4.10) of the non-depression group. In addition, there was a significant difference of VAS scores between the depression group and non-depression group in each disease group.</P><P><B>Conclusion</B></P><P>The mean VAS score of the depression group in WMSD was significantly higher than in the non-depression group. The correlation between BDI and VAS scores in the subjects was present, and the highest was in the HIVD group.</P>
정민우 ( Minwoo Jeong ),오제환 ( Jehwan Oh ),이은석 ( Eunseok Lee ) 한국정보처리학회 2009 한국정보처리학회 학술대회논문집 Vol.16 No.1
이동단말기기의 성능이 발전함에 따라 사용자에게 다양한 서비스를 제공할 수 있게 되었다. 하지만 사용자의 취향이나 의도에 따라 이용하는 선호 서비스는 일부분에 불과하다. 이것은 사용자마다 라이프스타일에 의한 서비스 사용 패턴에 차이가 있음에도 불구하고 획일화된 UI만을 제공하기 때문이다. 본 논문에서는 이동단말기기를 통하여 시간에 따른 사용자의 위치 및 콘텐츠 사용정보를 수집하고 의사결정트리를 이용하여 사용자의 콘텐츠 사용패턴을 추론한다. 또한, 추론한 콘텐츠 사용 패턴을 기반으로 개인화된 UI 구성 방법을 제안한다. 개인화된 지능성 UI를 통하여 사용자들이 라이프 스타일에 적합한 다양한 콘텐츠를 사용하게 되고, 이동단말기기의 활용성 또한 높아질 것을 기대할 수 있다.