딥러닝 기반 이미지 특징 추출 모델을 이용한 유사 디자인 검출에 대한 연구

이병우(Byoung Woo Lee),이우창(Woo Chang Lee),채승완(Seung Wan Chae),김동현(Dong Hyun Kim),이충권(Choong Kwon Lee) 한국스마트미디어학회 2020 스마트미디어저널 Vol.9 No.4

디자인은 섬유패션 산업에서 제품의 경쟁력을 결정짓는 핵심요인이다. 무단복제를 방지하고 독창성을 확인하기 위하여 제시된 디자인의 유사도를 측정하는 것은 매우 중요하다. 본 연구에서는 딥러닝 기법을 이용하여 섬유 디자인의 이미지로 부터 특징(feature)을 수치화하고, 스피어만 상관계수를 이용하여 유사도를 측정하였다. 유사한 샘플이 실제로 검출되는지 검증하기 위하여 300장의 이미지를 임의로 회전 및 색상을 변경하였다. 유사도 수치가 높은 순으로 Top-3와 Top-5의 결과에 회전을 하거나 색상을 변경한 샘플이 존재하는지 측정하였다. 그 결과, AlexNet 보다 VGG-16 모델이 월등히 높은 성능을 기록하였다. VGG-16 모델의 성능은 회전 이미지의 경우에 유사도 결과값이 높은 Top-3와 Top-5에서 64%, 73.67%로 가장 높게 나타났다. 색상변경의 경우에는 Top-3와 Top-5에서 각각 86.33%, 90%로 가장 높게 나타났다. Design is a key factor that determines the competitiveness of products in the textile and fashion industry. It is very important to measure the similarity of the proposed design in order to prevent unauthorized copying and to confirm the originality. In this study, a deep learning technique was used to quantify features from images of textile designs, and similarity was measured using Spearman correlation coefficients. To verify that similar samples were actually detected, 300 images were randomly rotated and color changed. The results of Top-3 and Top-5 in the order of similarity value were measured to see if samples that rotated or changed color were detected. As a result, the VGG-16 model recorded significantly higher performance than did AlexNet. The performance of the VGG-16 model was the highest at 64% and 73.67% in the Top-3 and Top-5, where similarity results were high in the case of the rotated image. appear. In the case of color change, the highest in Top-3 and Top-5 at 86.33% and 90%, respectively.

췌장염에 의한 가성낭종내에 생긴 가성동맥류 : 1례 보고

오연희,이채경,김승현,이성우,양창현,이정호,이영현 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

만성 췌장염의 합병증으로 생긴 가성동맥류는 드문질환으로, 반복적으로 다량의 출혈을 일으킬 수 있으며, 치료를 하지 않을 경우 사망율이 높기 때문에, 조기 진단과 치료가 필수적이다. 저자들은 38세 남자 환자에서 췌장염의 합병증으로 생긴 가성낭종내에서 발생한 가성동맥류 1예를 경험하였기에 보고하는 바이다. 가성 동맥류의 색혈류도플러상 낭종내에 양방향 흐름의 와류를 볼 수 있었다. Pancreatic Pseudoaneurysm within Pseudocyst from Pancreatitis: 1 Case Department of Diagnostic Radiology and Internal Medicine, College of Medicine,DongGuk University Yeon Hee OH M.D., Chae Kyeong Lee M.D., Seoung Hyeon Kim M.D., Sung Woo Lee M.D., Chang Heon Yang M.D., Jung Ho Lee M.D., Young Hyun Lee M.D. Pseudoaneurysm from pancreatitis is uncommon, but it can cause recurrent and massive hemorrhage. Because of high morbidity and mortality, early detection and treatment of the pseudoaneurysm is needed. We report a case of pseudoaneurysm within pseudocyst from pancreatitis. Color-flow Doppler sonography shows bidirectional flow and turbulent arterial flow, within anechoic mass.

정신분열병에 대한 리스페리돈의 효과 및 안정성

이민수,김용구,김영훈,연병길,오병훈,윤도준,윤진상,이철,정희연,강병조,김광수,김동언,김명정,김상훈,김희철,나철,노승호,민경준,박기창,박두병,백기청,백인호,손봉기,손진욱,양병환,양창국,우행원,이정호,이종범,이홍식,임기영,전태연,정영조,정영철,정인과,정인원,지익성,채정호,한상익,한선호,한진희,서광윤 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.1

연구목적 : 본 시험의 목적은 임상시험 시작전에 연구자들을 대상으로 PANSS Workshop을 통하여 PANSS, ESRS에 대한 국내에서의 표준화 작업을 구축하고 새로운 정신병 치료제인 리스페리돈의 효과와 안정성을 재확인하여 리스페리돈 사용에 대한 적정화를 이루는데 있다. 연구방법 : 1996년 4월부터 1996년 9월까지 국내 39개 대학병원 정신과에 입원중인 혹은 증상이 악화되어 입원하는 정신분열병 환자 377명을 대상으로 다시설 개방 연구를 시행하였다. 1주일간의 약물 배설기간을 가진후, 리스페리돈을 8주간 투여하였고, 기준점, 1주, 2주, 4주, 그리고 8주후에 평가되었다. 용량은 제1일에는 리스페리돈 1mg씩 1일 2회, 제2일에는 2mg씩 1일 2회, 제3∼7일에는 3mg씩 1일 2회 투여하였다. 이후 환자의 임상상태에 따라 임의로 증량할 수 있으며, 최대 일일 16mg을 초과하지 않도록 하였다. 추체외로 증상을 조절하기 위한 투약을 허용하였다. 임상증상 및 부작용의 평가는 PANSS(Positive and Negative Syndrome Scale), CGI(Clinical Global Impression) 그리고 ESRS(Extrapyramidal Symptom Rating Scale)을 사용하였다. 연구결과 : 377명중 343명(91%)이 8주간의 연구를 완결하였다. 치료 종결시점인 8주후 PANSS 총점수가 20% 이상 호전된 경우를 약물 반응군으로 정의할때, 약물반응군은 81.3%였다. 리스페리돈에 반응하는 예측인자로는 발병연령, 이전의 입원 횟수, 유병기간이 관련 있었다. 리스페리돈은 1주후부터 PANSS양성, 음성, 및 일반정신병리 점수상에 유의한 호전을 보여 효과가 빨랐다. CGI의 경우도 기준점에 비해 1주후부터 유의한 감소를 나타내었다. ESRS의 경우, 파킨슨 평가점수는 기준점과 비교해 투여 1주, 2주, 4주후 유의하게 증가되었다가 8주후 기준점과 차이가 없었다. Dystonia 평가점수는 1주후만 유의한 증가를 보였으며, dyskinesia 평가점수는 유의한 차이가 없었다. 혈압, 맥박수의 생명징후 및 일반 혈액학 검사, 생화학적 검사, 심전도 검사에서 유의한 변화는 없었다. 결 론 : 이상의 다시설 개방 임상 연구를 통해 리스페리돈은 정신분열병 환자에서 양성증상뿐만 아니라 음성증상 및 전반적인 증상에도 효과적인 것으로 사료된다. 보다 명확한 평가를 위해서는 다른 항정신병약물과의 이중맹검 연구가 필요할 것으로 생각되며, 또한 장기적 치료에 대한 평가도 함께 이루어져야 하겠다. Objective : The purpose of this study was to investigate the efficacy and safety of risperidone in the treatment of Korean schizophrenic patients. Method : This multicenter open study included 377 schizophrenic patients drawn from 39 university hospitals. After a wash-out period of 1 week, the schizophrenic patients were treated with risperidone for 8 weeks and evaluated at 5 points ; at baseline, and 1, 2, 4 and 8 weeks of treatment. The dose was increased from 2mg/day(1mg twice daily) to 6mg/day(3mg twice daily) during the first week and adjusted to a maximum of 16mg/day over the next 7 weeks according to the patient's clinical response. Medication to control extrapyramidal symptoms was permitted. The psychiatric and neurological status of the patients was assessed by PANSS, CGI, and ESRS scales. Results : 343(91%) of 377 patients completed the 8-week trial period. Clinical improvement, as defined by a 20% or more reduction in total PANSS score at end point, was shown by 81.3% of patients. The predictors of response to risperidone were associated older age, shorter duration of illness, fewer previous hospitalization. Risperidone had rapid onset of action ; a significant decrease of the total PANSS and three PANSS factor(positive, negative, general), and CGI was already noticed at the end of first week. For the ESRS, parkinsonism rating scores were significantly increased until week 4 comparing with baseline. Dystonia rating scores were significantly increased until week 1, and dyskinesia rating scores were not significantly changed during the study. Laboratory parameters including vital sign, EKG, hematological, and biochemical values showed no significant changes during the trial. Conclusions : This study suggests that risperidone is generally safe and effective against both the positive and negative symptoms in our group of patients.

X-대역 SiGe HBT MMIC 이중 평형형 상향 주파수 혼합기 개발

채규성,서정욱,김창우 경희-다반 ASIC 설계교육센터 2005 경희-다반 ASIC센터 논문집 Vol.6 No.-

SiGe HBT를 이용하여 X-band에 적용할 수 있는 두가지 형태의 상향 주파수 혼합기를 설계 및 제작하였다. 상향 주파수 혼합기는 Gilbert-cell 구조를 이용하여 LO 및 IF balun을 포함한 이중 평형형 형태로 설계하였으며, 일반적인 Gilbert-cell 구조와 선형성 향상을 위한 degeneration resistor를 삽입한 두가지 형태의 IC를 설계 및 제작하였다. 제작된 이중 평형형 상향 주파수 혼합기는 degeneration resistor를 삽입한 경우,0 to RF 변환 특성 측정 결과, 8.0 GHz의 -5 dBm LO 신호 및 100 MHz IG 신호 입력시, 10.5 dB의 IF to RF 선형 변환 이득과 -10.5 dBm의 Pl-dB RF 출력 전력을 나타내었다. 또한 일반적인 Gilbert-cell 구조를 이용한 상향 주파수 혼합기는, IF to RF 변환 특성 측정 결과, 8.0 GHz의 -5 dBm LO 신호 및 100 MHz IF 신호 입력시, 15.8 dB의 IF to RF 선형 변환 이득과 -14.5 dHm의 P_(1-dB) RF 출력 전력을 나타내었다. 따라서, degeneration resistor를 이용한 이중 평형형 상향 주파수 혼합기가 약 4 dBm의 선형성 개선 효과를 나타내었다.

인천지역 한 대학병원에서 진단된 기관지천식 중 직업관련성 천식

채창호,진영우,김은아,최승원,강성규,최용휴 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.2

Bronchial Asthma could be developed by occupational origin. 4-16% of bronchial asthmas are known to be related to occupational exposure. However, occupational asthma has not been reported from the periodic occupational health examination, but reported through case report from clinicians. The authors analysed hospital records to find out work-related bronchial asthma and their occupational characteristics at a university hospital in Inchon. All records which were confirmed as bronchial asthma in adult by an allegist from June, 1996 to May, 1998 were selected. Through record reviewing, any suspected work related asthma was selected and the inteview was done by phone or at the out-patient clinic. The possible cases were confirmed by additional tests including specific bronchial provocation test. Sixteen(3.9%) out of 411 bronchial asthma were confirmed as work-related asthma. Eight cases out of 16 worked at furniture industry, three worked at dye manufacturing and two worked at musical instrument manufacturing industry. Others worked at farm and machinary industry. The confirmed asthmogen were toluene diisocyante(8), reactive dye(3), and grain dust(1). None of the cases was detected as work-related asthma in the periodic health examination. Twelve out of sixteen occupational asthma patients discontinued their work. The results suggested that many patients with occupational asthma were not reported and the periodic health examination was not an effective system for detecting the workrelated asthma. Thus setting up the surveillance system involving allergist or pulmonologist would be important to detect and prevent occupational asthma.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

마이크로파 이중 평형형 UP-Converter의 선형성 연구

채규성,김창우 경희대학교 레이저공학연구소 2006 레이저공학 Vol.17 No.-

Two types of SiGe HBT MMIC double balanced frequency up-converter have been fabricated to compare linearity improvement : one using a gilbert-cell configuration with an emitter degeneration resistor and the other using a conventional gilbert-cell configuration. The frequency up-converter chips were fabricated using STMicroelectronics' 0.35 ㎛ Si-BiCMOS process. The frequency up-converter with an emitter degeneration resistor produces a P_(1-dB) of -10.5 dBm with a conversion gain of 10.5 dB, while the frequency up-converter without same resistor produces a P_(1-dB) of -14.7 dBm with a conversion gain of 16.3 dB. The frequency up-converter with a emitter degeneration resistor exhibits higher linearity than the conventional one.

대구시 간선가로망 구축에 의한 입체 교차로의 효율성에 관한 연구

임채문,공창환,정우영 大邱大學校 科學技術硏究所 1994 科學技術硏究 Vol.1 No.-

It is necessary to establish a link organization to device the transportion planning relieving traffic congestion. Therefore, this study has established a principal link centering around Taegu city, and reviewed the efficienay of the grade intersations and the 3-Dimensional intersations. The results of this study are as fallow; This study has established each circulation lane by Grid partition and Daiiy Traffic Volume (the 1st circulation lane; 000m, the 2nd circulation lane; 800m, the 3rd circulation lane; 1000m) The delay model of a length is t₂= exp(3.0091 +0.001242x)k (R²=0.78). The conversion of traffic volume into turning point the grade and 3-Dimensional intersection at single intersection is different by the distance between intersections. The decrease of total link delay is minute by one or two 3-Dimension on a intersection, and the 3-Dimension on the 2nd and and circulation lane is more effective than the 1st circulation lane. In the case of multi-intersections, passing time on the 3-Dimension passing throuth the urban center and the bypassing road has a little difference. For that reason, the bypassing route must be considerd instead of the 3-Dimension passing throuth the unban center. So an examination and re-settlement of the future pricipal link is necessary to organze the principal link on Taegu city using other factor.

신호주기에 따른 차량군 분석을 통한 속도 Model 구축

임채문,이영우,공창환,박영환 대구대학교 과학기술연구소 1999 科學技術硏究 Vol.6 No.1

The purpose of this thesis is to develop a simulation model to estimate travel speed applicable to urban street transportation planning for interrupted traffic flow, influenced by signalized intersection. This simulation model is expected to be a better and more than previous studies. The results are summarized as follow ; 1. As a result of analyzing the travel speed to the ratio of vehicle stops, the high correlation between travel speed and the ratio of vehicle stops is obtained and is more likely to have a nonlinear shape than a linear shape. 2. The algebraic equation is the most appropriate equation among the linear algebraic and exponential equations which use the ratio of vehicle stops as a variable. 3. This study suggests that the maximum travel speed is 44.73km/h when the ratio of vehicle stops is 0.01 when speed is perceived to be high, if there are no standing vehicles on the road, there is a perfect offset. There fore. there is a little traffic volume considering the maximum travel speed to be appropriate, the minimum travel speed is 16.45km/h when the ratio of vehicle stops is 1. 4. Considering many variales such as the condition of city roads and the condition of traffic signals, this study suggests the equations.

우회전 능률차로 도입에 따른 지체시간 및 효율성 분석

임채문,이영우,공창환,이주호 대구대학교 과학기술연구소 1999 科學技術硏究 Vol.6 No.2

The most important elements in planning are road width and road sectional structure which are necessary to decide by exact forecast of traffic demand, but in case of Korea, the decision still adopts unreasonable urban planning line of the past. Therefore the purpose of this research is applicate for arterials increasing of facility area and traffic effect iveness(delay and capacity) with minimum cost to make maximum effective about road transverse sectional structures.