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국제학술회의 참관기 - 제17차 세계 내비뇨기 및 충격파 쇄석술회의
이형래,Lee, Hyeong-Rae 한국과학기술단체총연합회 1999 과학과 기술 Vol.32 No.11
제17차 세계 내비뇨기 및 충격파 쇄석술 회의가 지난 9월2일부터 4일간 그리스의 세계적 휴양지 로도스섬에서 1천4백여명이 참석한 가운데 열렸다. 우리나라에서 19명이 참석하여 12편의 논문이 발표된 이번 학술회의는 '방광결석의 치료에 대한 역사적 고찰'이 참석자들의 큰 관심을 끌었다.
이형래 ( Hyung Rae Lee ),김미선 ( Mi Sun Kim ),한태영 ( Tae Young Han ),손숙자 ( Sook Ja Son ),이현경 ( Hyun Kyung Lee ),이홍선 ( Hong Sun Lee ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.3
Background: Recently, tattooing of the body has become popular, and its associated psychological, sociological, and cultural implications have changed compared to past years. However, little is known about the current clinical features, including motive and satisfaction for having a tattoo, because of societal repulsions toward the practice. Objective: To evaluate the clinical manifestations of tattooed young Korean males and to compare the findings with previous studies. Methods: Between September 2010 and July 2011, 223 patients with tattoos who visited the Eulji Medical Center and Armed Forces Yangju Hospital were selected. The patients were evaluated through a self-administrated questionnaire and physical examinations. Results: The majority of patients were classified into the did not complete university education group (56.1%). Most tattooed males had two living parents (83.4%) and were raised in households whose income statuses were not marked by poverty. The average age at which their first tattoo was received was 19.0 years. Most tattooed males had a negative attitude towards their tattoos (67.3%). The most common motivation for getting a tattoo was curiosity, but cosmetic purposes were also important (19.4%). A majority of the tattooing was conducted by a tattoo artist (73.3%). The most common tattoo content was letters. Black-colored tattoos were most frequently observed. The complication rate was 13.9%. The most common motivation for tattoo removal was negative comments that were made at work, in public, and in school (38.2%). Conclusion: Recent patterns of tattooing have changed significantly since previous reports. The satisfaction rate in getting a tattoo was not favorable. Understanding the current clinical features related to tattooing is important and it is necessary for dermatologists to provide professional advice regarding tattooing among young males. (Korean J Dermatol 2012;50(3):212~219)
가상의 아바타와 악수 시 아바타의 인지와 관련된 뇌 메커니즘 : 선행 연구
이형래(Hyeongrae Lee),구정훈(Jeonghun Ku),이원호(Wonho Lee),한기완(Kiwan Han),박진식(Jinsick Park),김세진(Jae-Jin Kim),김인영(In Young Kim),김선일(Sun I. Kim) 한국HCI학회 2008 한국HCI학회 학술대회 Vol.2008 No.2
가상현실은 감각기관(시각, 청각, 촉각)에 전달하는 정보를 조작하여 실제적인 가상의 3차원환경을 사용자에게 제공한다. 최근에는 가상현실은 아바타라는 객체의 등장으로 단순히 사용자에게 가상의 공간을 제공하는 것을 넘어서서 가상의 공간에서 타인을 대변하는 아바타와 여러 상호작용을 통해서 또 다른 하나의 가상의 사회를 제공할 수 있는 도구로 자리 잡고 있다. 실제 사회에서의 사회적인 관계에서는 타인과 직접적인 상호작용이 많이 발생하게 되는데, 기존의 연구들은 아바타와 실제적인 상호작용을 하는 환경이 아니었다. 따라서, 본 연구에서는 가상의 아바타와 실제로 상호작용을 할 때 아바타를 어떻게 인지하는 지를 알아보기 위해서 가상환경에서 아바타를 만나서 악수를 청하였을 때 아바타가 악수를 받아들이거나 거절하는 환경을 구현하여 뇌 기능영상 연구를 수행하였다. 아바타의 행동이 어떠한 느낌을 주었는지를 알아본 설문지 결과에서 악수를 받아들인 아바타에 대해서는 긍정적이고, 적절한 행동을 한다고 받아들인 반면, 악수를 거부한 아바타 에서는 나에게 부정적인 감정을 가지고 있고 거부하고 있다고 피험자가 인식한 것으로 나타났다. 뇌 기능영상 분석 결과 상대 아바타가 악수를 받아준 경우와 거절한 경우 공통적으로 the primary visual area, the visual association area, the SMA, the premotor area과 the cerebellum등의 영역에서 뇌 활성화가 나타났다. 설문결과와 fMRI 분석 결과 이는 피험자가 아바타를 나와 구별되는 사회적인 객체로 인지하였고, 아바타의 동작도 사회적 의미가 있는 동작으로 받아 들였다는 것을 의미한다. 다르게 말해 가상의 아바타가 행동을 통해서 사회적 context 뿐만 아니라 감정도 전달이 가능하다는 것을 의미한다. 본 연구는 fMRI 환경에서 실제로 상호작용이 가능한 환경에서 아바타의 행동에 대한 사용자의 인지를 알아보았다는 것에 의의가 있다고 하겠다. It provides a three-dimensional virtual experience consisting of information presented to and perceived by the senses of the user. Recently, the advent of a virtual avatar, which mimics the appearance and behavior of humans, enable that the virtual reality (VR) can provide not only a virtual space but also a virtual society to be interact with a virtual avatar which represents humans. But, it is impossible that the user directly interacts with the VE in previous studies, though direct interactions occur in real social relationship. Therefore, In this study, we know that the cognition about a avatar when the user directly interacts with the virtual avatar in the VE. In order to investigate this purpose, we performed a fMRI study using VE that a avatar accept or reject the user's offer when the user offer his (or her) hand to a avatar. In result of questionnaire about the user's feeling by avatar's action, the user feels about avatar's acceptance action that the avatar acts positively and suitably. In contrast the user feels about avatar's rejective action that the avatar acts negatively and disapprovingly. In result of fMRI analysis, the primary visual area, the visual association area, the SMA, the premotor area, the cerebellum and etc. activate in common with the other avatar's acceptance action and rejective action. The results show that the subject recognizes not only avatars as social objects but also avatar's action as socially meaningful action. In other words, it is possible to transfer social context and emotion through avatar's action.
이형래 ( Hyung Rae Lee ),김미선 ( Mi Sun Kim ),이현경 ( Hyun Kyung Lee ),박건 ( Kun Park ),손숙자 ( Sook Ja Son ) 대한피부과학회 2010 대한피부과학회지 Vol.48 No.1
Skin cancers require excision and reconstruction for achieving optimal functional and cosmetic results. There are numerous reconstructive options, which include primary repair, secondary intention healing, a local flap and a skin graft. Generally, a full-thickness skin graft is not considered applicable for reconstructing a nasal defect because a local flap is thought to be a superior alternative to a skin graft due to the unique nature of the lower third of the skin, which is often thick and fixed to the adjacent structures. But a defect on a lower third of the nose that includes the nasal ala can be well reconstructed by a skin graft in some cases. The donor site options include the preauricular, postauricular and supraclavicular areas etc. But in some cases, the forehead skin is a good match with the nasal ala area. We herein report the case of a 69-year-old female with a nasal ala defect that was induced by excision of basal cell carcinoma. The patient was reconstructed with a full-thickness skin graft using the redundant skin of the forehead. (Korean J Dermatol 2010;48(1):47∼50)
다공질 재료의 음향 성능 예측을 위한 물성 측정법 연구
이형래(Hyeong Rae Lee),김호용(Ho Yong Kim),전주현(Ju Hyun Jeon),강연준(Yeon June Kang),이정욱(Jung Wook Lee),김지완(Ji Wan Kim) 한국소음진동공학회 2018 한국소음진동공학회 논문집 Vol.28 No.2
Porous materials, which is widely used to control the noise, divided into fluid phase and solid phase. Accordingly, it can be characterized by acoustical parameters (flow resistivity, porosity, tortuosity, viscous characteristic length, and thermal characteristic length) due to the fluid phase and elastical parameters (Young’s modulus, loss factor, and Poisson’s ratio) due to the solid phase. These physical characteristics of the porous materials are essential to predict the acoustical properties such as wavenumber, surface impedance, absorption coefficient, and so on. Therefore, this study focuses on accurate measurement of several physical characteristics (porosity, tortuosity, elastical parameters) using the Porosity/Bulk density meter, Tortuosity meter and QMA developed by Mecanum Inc., respectively. We suggest setup values for measurement such as pressure, excitation frequency, etc. to reduce uncertainties of the results. Finally, the predicted and measured absorption coefficient are compared to verify the reliability of measured physical characteristics of porous materials. In addition, using global sensitivity analysis, the effect of the measurement deviation of the physical characteristics on the sound absorption coefficient is confirmed.