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Dy 및 Mg가 첨가된 BaTiO<sub>3</sub>에서 소결 온도가 미세구조와 유전특성에 미치는 영향
우종원,김성현,최문희,전상채,Woo, Jong-Won,Kim, Sung-Hyun,Choi, Moon-Hee,Jeon, Sang-Chae 한국결정성장학회 2022 한국결정성장학회지 Vol.32 No.5
Rare-earth elements were doped with Mg to enhance the temperature stability of dielectric properties of BaTiO<sub>3</sub> for its application to MLCC (Multi-Layer Ceramic Capacitor). The additives strongly affect both grain growth and densification behaviors during sintering, and hence dielectric properties. The additive effects therefore should be examined in each system with different additives. This study investigated the crystal structure, grain growth and densification behaviors and related variations in dielectric constant with respect to sintering temperature. Dielectric constant appears to be varied with grain size in a temperature range between 1200 and 1300℃, suggesting the importance of grain size control. The temperature dependence of grain size variation was well explained by an established theory correlating the grain growth behavior with grain boundary structure. This accordance provides a basis for sintering technique to control grain growth thus to improve dielectric constant in rare-earth doped BaTiO<sub>3</sub>.
우종원(Woo Jong Won),윤승현(Yoon Seung Hyeun),유재수(Yoo Jae Soo) 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.6
The Document Management System(DMS) is a system which retrieves and manages library information efficiently. Since DMS manages the information using only one table, it does not need to provide join and view operations that spend high cost in traditional DBMS. In addtion, DMS requires new operations because of their property. The operation has not been supported in existing DBMSs. In this paper we define a data language which represents the structure definition and process of data on the DMS. Especially we define Ranking and Proximity operation which is needed in Document Retrieval. We also design and implement a query processor to process the query constructed with the data language. When the existing query processors of relational DBMS are used as a query processor of DMS, they degrade the whole system performance. The proposed query processor not only overcomes such a problem but also supports new operation which is needed in DMS.
청강 김영훈의 월경 관련 질환 처방에 관한 연구 -病因 血中氣滯를 중심으로
우종원(Jongwon Woo),김동율(Dongryul Kim) 한국의사학회 2019 한국의사학회지 Vol.32 No.2
Thepurposeofthisstudyisanalyzinghow Kim Young-hun treatedmenstrualdiseases-byutilizingtheCheonggangmedicalrecordsDB. Theterm “Hyeoljunggiche(血中氣滯)”hasbeenusedasanetiologicalfactorofmenstrualdiseases.Hyeoljunggichemostlydescribedmenstrual diseasesoffemalesinthereproductiveages.FourofthemostpopularprescriptionwereJeungsonojeok-san(增損五積散),Hyeonbuigyeong-tang (玄附理經湯),Hyeonbuiyeong-jeon(玄附理營煎),andHyeonbuohwa-eum (玄附五和飮).Bywritingamedicinalherbnetworkofthefourprescriptions, ItwasfoundthatKim Young-hunpreferredtousethreeclustersofregulatingqiandmovebloodmedicinal(理氣行血藥),sānwù-tāng(三物湯), andpíngchén-tāng(平陳湯)withsomeadjustmentofheat-clearingmedicinal(淸熱藥)andcold-dispellingmedicinal(溫裏藥).
우종원(Jongwon Woo),김동율(Dongryul Kim) 한국의사학회 2020 한국의사학회지 Vol.33 No.2
본고에서는 청강 진료기록DB를 활용하여 김영훈이 칠정과 관련된 질환을 어떻게 접근하고 치료하였는지를 분석하였다. 김영훈은 칠정과 기, 담, 화 및 이들의 울증을 병인으로서 병기하는 경우가 많았으며, 병명은 탈영과 함께 기재하는 경우가 많았다. 칠정 관련 병인이 1950년대에 특히 많이 기재되어 있었는데, 이는 한국전쟁의 영향을 받은 것으로 보인다. 김영훈이 칠정 관련 병인을 치료하기 위해 사용한 상위 빈도 처방은 대개 육울탕의 변방으로 소개되어 있었다. 그가 실제로 사용한 약재를 분석한 결과, 김영훈은 주로 二陳湯과 香附子를 준용하여 化痰理氣를 칠정 치료의 대원칙으로 삼았음을 추정할 수 있었으며, 利濕藥, 消導藥, 淸熱藥, 四物湯의 류를 때에 따라 가감한 것을 확인하였다. The purpose of this study is to consider how Kim Young-hun approached and treated diseases caused by seven emotions using Cheonggang medical records database. Kim Young-hun often related seven emotions with qi, phlegm, fire and depressions of these three and with the loss of dignity (脫營). Records of seven emotions were especially concentrated in the 1950s, and it seems to have been influenced by the Korean war. The prescriptions which Kim used frequently were introduced as modified 六鬱湯. Analyzing the medicinal herbs Kim used, it was estimated that Kim would have applied “allevating phlegm and regulating qi” as the principle of the treatment of the seven emotions using 二陳湯 and Cyperus(香附子) with some adjustment of 利濕藥, 疏導藥, 淸熱藥, and 四物湯.
JPEG 영상의 저작권 보호를 위한 Digital Watermarking 알고리즘
박은숙,우종원,이석희,허윤석,조기형,Park, Eun-Suk,Woo, Jong-Won,Lee, Seok-Hee,Heo, Yoon-Seok,Cho, Ki-Hyung 한국정보처리학회 2000 정보처리논문지 Vol.7 No.1
In this paper, we propose the method of embedding the encrypted digital watermark in quantization coefficient when we encode the image data in the process of JPEC. The proposed method is as following. After a DCT coefficient of each block is quantized, we arrange the quantization coefficient as on dimension with a zigzag scan and replace each block. By applying even-odd feature of frequency of the encrypted watermark to a quantization coefficient of some fixed domain of replaced each block and embedding it, we obtain the compressed image data by encoding after placing it in the order prior to replacement. The advantages of the proposed method here are as follows: We can embed many information keeping a secret as much as possible by using the algorithm of block replacement. We can control the amount of embedding of each use, as we embed the encrypted information by selecting some fixed domain of a quantization coefficient, we can fix the embedding data regardless of the image and the value of quantization. We verified the results by experiments and analyzed the efficiency of them in comparison with the former study. 본 논문에서는 암호화된 디지털 워터마크를 JPEG 부호화 과정 중 양자화 계수에 합성하는 디지털 워터마킹 방법을 제안한다. 제안된 워터마킹 방법은 다음과 같다. 먼저 각 블록의 DCT 계수를 양자화 한 후 지그재그 스캔으로 양자화 계수를 1차원으로 배열하여 각 블록을 치환한다. 치환된 각 블록의 일정 영역의 양자화 계수에 암호화된 워터마크를 주파수의 우기성을 적용, 합성한다. 합성이 끝난 후 치환되기 전 순서로 다시 복원하여 부호화 과정을 거쳐 압축된 영상데이터를 얻는다. 본 논문에서 제안된 방식은 합성 전 블록 치환 알고리즘을 사용함으로써 보안을 최대한 유지하면서 많은 정보를 합성할 수 있다. 또한 양자화 계수의 일정 영역을 선택하여 암호화된 정보를 합성하기 때문에 용도에 따른 합성량을 조절 할 수가 있고, 영상 및 양자화 값과 상관없이 합성 데이터를 고정시킬 수 있는 장점이 있다. 본 논문에서는 실험을 통해서 그 결과를 검증하고 기존 연구와의 비교 및 그에 따른 성능을 분석하였다.
일개한의의료기관에서 시행한 침도치료 시술 후 이상반응에 대한 설문조사
정세훈 ( Sehun Jung ),우종원 ( Jongwon Woo ),채효청 ( Hyocheong Chae ),오기창 ( Kichang Oh ),최소연 ( Soyoun Choi ),이주현 ( Joohyun Lee ),강경호 ( Kyungho Kang ),추홍민 ( Hongmin Chu ),유명석 ( Myungseok Ryu ) 경락경혈학회 2020 Korean Journal of Acupuncture Vol.37 No.4
Objectives : This study aimed to evaluate adverse outcome associated with acupotomy and compare it with that of acupuncture. Methods : We retrospectively analyzed the chart records of 71 patients who received acupotomy at Daemyung Korean medical clinic from January 7, 2020 to March 6, 2020. We divided the acupotomy treatment area into 10, including the head, hand, chest, knees, shoulders, low back, neck, upper extremities, thighs, and feet. Furthermore, we investigated the adverse effect of acupotomy on those areas after treatment. Data were analyzed using descriptive statistics, and frequency analysis. Results : ‘Bruise of specific region’ accounted for the largest portion with 29 cases, followed by 24 cases of ‘feeling tired and sleepy’ and 17 cases of ‘itch’. There were 16 cases of ‘sustained pain’ at the area of treatment, 11 cases of ‘fatigue’, 5 cases of ‘swelling’, 5 cases of ‘dizziness’, 4 cases of ‘hematoma’. There were 3 cases of ‘vertigo’ and 2 cases of ‘parathesia’ and ‘wide bruises’, ‘headache’, ‘gastric discomfort’, ‘bleeding’, and ‘skin rash’ each. There was one case each that experienced ‘unclear pronunciation’, ‘nausea’, ‘abnormal sweating’, ‘vomiting’ and ‘emotional/psychological reactions’. Conclusions : Adverse outcomes associated with acupotomy were mostly ‘bruise of specific region’, ‘feeling tired and sleepy’, ‘itch’, ‘sustatained pain’, and ‘fatigue’. However, no adverse outcome or irreversible damage that have a serious effect on the body were observed.
정순철(Jung, Soon-Chul),우종원(Woo, Jong-Won),김용수(Kim, Yong-Soo),이재응(Lee, Jae-Eung) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.8
When driving on uniformly tining concrete pavement road, the whine noise which has high spectrum at the specific frequency related to the uniform tining space exist. In this paper, a randomization method of tining space for concrete pavements is proposed to reduce the whine noise. The proposed method is developed based on the LCG(linear congruential generator) algorithm. The design parameters used in the method are number of different tining space, ratio of each tining space, total linings of each size. sequence of actual tining under given constant drag length and texture. Monte Carlo simulations are used to validate the proposed method.