외부영상정보 입력 시 DICOM정보 충실성에 대한 평가 - DICOM Validation Tool 이용 -

이송우,이호연,도지훈,장혜원,Lee, Song-Woo,Lee, Ho-Yeon,Do, Ji-Hoon,Jang, Hye-Won 대한디지털의료영상학회 2011 대한디지털의료영상학회논문지 Vol.13 No.1

Now a days, there's many change over for PACS among the most of hospital and it standard for DICOM 3.0. These kind of using of DICOM 3.0 improves increasing of medical imaging exchange and service for patient. However, there's some problems of compatibility caused during carry out CD and DVD from hospital. For this reason, this thesis analyzed patients image targeting those storages requested to hospitals in Seoul by using Validation Toolkit which is recommended from KFDA. The analyze type is like this. Make 100 data, total 500, each of MRI CT Plain x-ray Ultrasound PET-CT images and analyzed type of error occurred and loyalty of information. If express percentage of error occurred statistically, we can get a result as follows MRI 5%, Plain x-ray 11%, CT 18%, US 25%, PET-CT 30%. The reson why percentage of error occurred in PET-CT is because of imperfective support and we could notice that we weren't devoted to information. Even though, PET-CT showed highest percentage of error occurred, currently DICOM data improved a lot compare to past. Moreover, it should be devoted to rule of IHE TOOL or DICOM. In conclusion, we can help radiographer to analyze information of image by providing clues for solving primary problem and further more, each of PACS company or equipment company can enhance fidelity for following standard of image information through realizing the actual problem during transfer of image information.

청소년의 미디어스포츠 관여경험이 스포츠 스타 이미지 형성과 스포츠 참여에 미치는 영향

이송우(Song Woo Lee),이지환(Ji Hwan Lee),김태형(Tai Hyung Kim) 한국사회체육학회 2013 한국사회체육학회지 Vol.0 No.52

This study aims to cultivate sound youth culture through media sports involvement experience for the youth who are keen to social trend and change of the times by making sports stars as their role model to imitate their appearance, attitude and behavior and to earn psychological stability and positive sports values and to make them participate in the sports for active school life and their routine. To achieve such objectives, it set enrolled students in “C” province and “D” metropolitan city in 2011 as population, appointed 12 schools in twos per each middle and high schools in large, middle and small cities and towns, and extracted 600 samples from 50 students per school. Total 577 questionnaires excluding insuf-ficient ones, were analyzed. For a research tool for resource collection, it revised and adapted questions used in a previous study, and collected questionnaires have been treated using SPSS 12.0 program. And the con-clusions were as follows. First, appearance image among sub-factors of sports star image was proved to have effects on technology, interest and challenge involvement experience, while performance image had an influ-ence on technology and interest involvement experience. And moral image was proved to have an influence on interest involvement experience only. Second, cognitive and affective involvements among sub-factors of sports involvement were proved to have effects on appearance and sports performance image, while affective involvement had an influence on appearance, sports performance and moral image. Third, cognitive and affec-tive involvements among sub-factors of sports involvement were proved to have effects on technology, inter-est and challenge involvement experience, while behavioral involvement had an influence on technology and interest involvement experience.

산과 염기의 개질에 의해 변화된 활성탄의 표면특성과 흡착특성의 비교

이송우 ( Song Woo Lee ),이민규 ( Min Gyu Lee ),박상보 ( Sang Bo Park ) 한국환경과학회 2008 한국환경과학회지 Vol.17 No.5

활성탄의 기공구조에 따른 아세톤 증기와 톨루엔 증기의 흡착 및 탈착특성 비교

이송우 ( Song Woo Lee ),나영수 ( Young Soo Na ),안창덕 ( Chang Doeuk An ),이민규 ( Min Gyu Lee ) 한국환경과학회 2012 한국환경과학회지 Vol.21 No.10

The purpose of this work is to study the adsorption and desorption characteristics of acetone vapor and toluene vapor from adsorption tower in the VOCs recovery device. The six kinds of activated carbon with different pore structures were used and the adsorption and desorption characteristics were compared according to pore structure, desorption temperature, and adsorption method, respectively. Adsorption capacity of acetone vapor and toluene vapor by batch method was higher than that by dynamic method. Especially, activated carbon with medium-sized or large pores had more difference in adsorption capacity according to adsorption methods as a result of gradually condensation of vapors on relatively mesopore and large pores. Activated carbons with relatively large pores and relatively small saturated adsorption capacity had excellent desorption ability.

무선 센서 네트워크에서의 소스 위치 프라이버시

이송우(Song-Woo Lee),박영훈(Young-Hoon Park),손주형(Ju-Hyung Son),서승우(Seung-Woo Seo),강유(Yu Kang),최진기(Jin-Gi Choe),문호건(Ho-Gun Moon) 한국정보보호학회 2007 정보보호학회논문지 Vol.17 No.2

본 논문에서는 센서 네트워크에서의 소스 위치 프라이버시를 제공하기 위한 방법을 제안하고 그 방법이 제공하는 익명성 정도를 분석하였다. 센서 네트워크에서의 소스 위치는 실제 센서의 지리적 위치이기 때문에 소스의 위치가 노출되지 않도록 보호하는 것이 매우 중요하다. 그러나 센서 네트워크에서는 내용 보호 및 인증에 관한 연구에 비해 소스 위치 프라이버시에 관한 연구는 아직 미흡하다. 더욱이 인터넷과 Ad-Hoc 네트워크에서 소스의 익명성을 제공하기 위한 기법들이 많이 제안되었지만, 이러한 기법들은 에너지 제한적인 센서 네트워크에 적합하지 않기 때문에 센서 네트워크의 특성에 맞는 익명성 제공 기법이 요구된다. 본 논문에서는 먼저 센서 네트워크에서 나타날 수 있는 Eavesdropper의 유형을 Global Eavesdropper와 Compromising Eavesdropper으로 정의하고, 이러한 Eavesdropper의 유형에 따라 소스의 익명성을 제공할 수 있는 새로운 기법을 제안하였다. 그리고 엔트로피 기반의 모델링 방법을 이용해 제안한 기법이 제공하는 익명성 정도를 분석하였다. 그 결과, 제안하는 기법을 사용할 경우가 그렇지 않은 경우 보다 소스의 익명성 정도가 높고, 센서의 전송 거리가 소스의 익명성 정도를 높이는데 중요한 요소임을 보였다. This paper proposes a new scheme to provide the location privacy of sources in Wireless Sensor Networks (WSNs). Because the geographical location of a source sensor reveals contextual information on an `event' in WSN, anonymizing the source location is an important issue. Despite abundant research efforts, however, about data confidentiality and authentication in WSN, privacy issues have not been researched well so far. Moreover, many schemes providing the anonymity of communication parties in Internet and Ad-hoc networks are not appropriate for WSN environments where sensors are very resource limited and messages are forwarded in a hop-by-hop manner through wireless channel. In this paper, we first categorize the type of eavesdroppers for WSN as Global Eavesdropper and Compromising Eavesdropper. Then we propose a novel scheme which provides the anonymity of a source according to the types of eavesdroppers. Furthermore, we analyze the degree of anonymity of WSN using the entropy-based modeling method. As a result, we show that the proposed scheme improves the degree of anonymity compared to a method without any provision of anonymity and also show that the transmission range plays a key role to hide the location of source sensors.

유증기를 구성하는 주요 10종류 성분의 온도에 따른 흡·탈착특성 비교

이송우 ( Song Woo Lee ),나영수 ( Young Soo Na ),이민규 ( Min Gyu Lee ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.9

Adsorption and desorption characteristics of the representative 10 kinds components consisting of gasoline vapor on activated carbon were investigated at the temperature range of -30℃∼25℃. The breakthrough curves of each vapors obtained by the Thomas model were well described the breakthrough experimental results of this study. The breakthrough times of each vapors were correlated with the molecular weight, density, and vapor pressure. The breakthrough times had greater correlation with boiling point than molecular weight and density. The slope of the breakthrough curve was a proportional relationship with the rate constant (k) of Thomas model expression. The higher the slope of the breakthrough curve, the rate constant was larger. The biggest slope vapor had the smallest adsorption capacity (qe). Adsorption and desorption characteristics of mixed vapor similar to the gasoline vapor were studied at room temperature (25℃). The mixed vapor consisting of 9 components; group A (pentane, hexene, hexane), group B (benzene, toluene), group C (octane, ethylbenzene, xylene, nonane) was examined. Group A was not nearly adsorbed because of substitution by group C, and the desorption capacity of group A was smaller than group C. The adsorbed substances were confirmed to be Group C.

국내 무연탄으로 제조한 활성탄과 상업용 활성탄의 세공특성 분석

이송우(Song Woo Lee),문장천(Jang Cheon Moon),이창한(Chang Han Lee),류동춘(Dong Chun Ryu),최동훈(Dong Hoon Choi),류병순(Byung Soon Ryu),송승구(Seung Koo Song) 大韓環境工學會 2001 대한환경공학회지 Vol.23 No.7

석탄계 활성탄에 의한 수중의 메틸렌블루와 페놀 흡착 특성

이송우 ( Song Woo Lee ),감상규 ( Sang Kyu Kam ),이민규 ( Min Gyu Lee ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.9

The efficiency of coal-based activated carbon in removing methylene blue (MB) and phenol from aqueous solution was investigated in batch experiments. The batch adsorption kinetics were described by applying pseudo-first-order, pseudo-second-order, and first order reversible reaction. The results showed that the adsorption of MB and phenol occurs complexed process including external mass transfer and intraparticle diffusion. The maximum adsorption capacity obtained from Langmuir isotherm was 461.0 mg/g for MB and 194.6 mg/g for phenol, respectively. The values of activation parameters such as free energy (△Go), enthalpy (△Ho), and entropy (△So) were also determined as -19.0∼-14.9 kJ/mol, 25.4 kJ/mol, and 135.2 J/mol K for MB and 51.8∼54.1 kJ/mol, -29.0 kJ/mol, and -76.4 kJ/mol K for phenol, respectively. The MB adsorption was found to be endothermic and spontaneous process. However, the CV adsorption was found to be exothermic and non-spontaneous process.

유증기 회수를 위한 VOCs 탈착에 미치는 온도, 압력 및 공기유량의 영향

이송우 ( Song Woo Lee ),나영수 ( Young Soo Na ),감상규 ( Sang Kyu Kam ),이민규 ( Min Gyu Lee ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.9

Desorption characteristics of VOCs were investigated for the effective recovery of gasoline vapor. The adsorption capacity and desorption capacity were excellent at relatively low temperatures. The differences in the desorption capacity were not large in the condition; desorption temperature 25℃, desorption pressure 760 mmHg, inlet air flow rate 0.5 L/min, but were relatively great in the condition; desorption temperature 0℃, desorption pressure 60 mmHg, inlet air flow rate 1.0 L/min. The desorption ability of pentane was increased to about 81.4%, and the desorption ability of hexane was increased to about 102%, also the desorption ability of toluene was increased to about 156.7% by changes of temperature, pressure, inlet air flow rate in the experimental conditions. The optimum desorption condition for the effective recovery of VOCs was in the conditions; desorption temperature 0℃, desorption pressure 60 mmHg, inlet air flow rate 1.0 L/min.

Zeolite의 수증기 흡착특성

이송우 ( Song Woo Lee ),나영수 ( Young Soo Na ),안창덕 ( Chang Doeuk An ),이민규 ( Min Gyu Lee ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.5

The purpose of this work is to present the experiment results by a dynamic adsorption of water vapor on pelletized zeolites (ADZ300, ADZ400, and ADZ500) in fixed bed. The breakthrough curves of water vapor with several different concentrations and temperature in the range of 25~45℃ on zeolite bed were investigated. In the same conditions, the breakthrough time on ADZ400 and ADZ500 were little longer than ADZ300, and the equilibrium adsorption capacity on ADZ500 was highest. The higher the concentration of water vapor was, the faster the breakthrough time was, and the slope of breakthrough curves showed a tendency to increase. The faster the flow rate of water vapor was, the faster the breakthrough time was relatively, but variations between flow rate and breakthrough time did not have a proportional relationship. The breakthrough curve maintained constant gradient in spite of variation of flow rate in the same concentration. The temperature rise in zeolite bed by adsorption heat was occurred in the early stage of adsorption. After water molecule layers were formed on the surface of zeolite, the temperature was slowly cooled by water vapors continuously flowed in as constant temperature. The greater the concentration of water vapor and adsorption temperature were, the temperature difference in zeolite bed was increased.