평활화 알고리즘에 따른 자궁경부 분류 모델의 성능 비교 연구

김윤지,박예랑,김영재,주웅,남계현,김광기,Kim, Youn Ji,Park, Ye Rang,Kim, Young Jae,Ju, Woong,Nam, Kyehyun,Kim, Kwang Gi 대한의용생체공학회 2021 의공학회지 Vol.42 No.3

We developed a model to classify the absence of cervical cancer using deep learning from the cervical image to which the histogram equalization algorithm was applied, and to compare the performance of each model. A total of 4259 images were used for this study, of which 1852 images were normal and 2407 were abnormal. And this paper applied Image Sharpening(IS), Histogram Equalization(HE), and Contrast Limited Adaptive Histogram Equalization(CLAHE) to the original image. Peak Signal-to-Noise Ratio(PSNR) and Structural Similarity index for Measuring image quality(SSIM) were used to assess the quality of images objectively. As a result of assessment, IS showed 81.75dB of PSNR and 0.96 of SSIM, showing the best image quality. CLAHE and HE showed the PSNR of 62.67dB and 62.60dB respectively, while SSIM of CLAHE was shown as 0.86, which is closer to 1 than HE of 0.75. Using ResNet-50 model with transfer learning, digital image-processed images are classified into normal and abnormal each. In conclusion, the classification accuracy of each model is as follows. 90.77% for IS, which shows the highest, 90.26% for CLAHE and 87.60% for HE. As this study shows, applying proper digital image processing which is for cervical images to Computer Aided Diagnosis(CAD) can help both screening and diagnosing.

잣잎분말을 이용한 진말다식의 품질 및 감각 특성

김윤지,박은빈,유수인,이민호,이효정,강아영,백진경,Kim, Yoonji,Park, Eunbin,Ryu, Soo In,Lee, Minho,Lee, Hyo-Jeong,Kang, Ahyoung,Paik, Jean Kyung 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.5

This study tried to develop Jinmal dasik using pine nuts leaf powder with antibacterial and antioxidant properties. After preparing the Jinmal dasik in proportions of 0%, 2%, 4%, 6%, and 8% by varying the ratio of pine needle powder, the moisture, color, physical properties, antioxidant properties and sensory quality were measured. Except for the 8% Jinmal dasik, the L value of chromaticity significantly decreased as the amount of pine needle powder increased (p<0.001). In addition, the value significantly decreased with increased density (p<0.001). Based on our physical properties evaluation results, the hardness, cohesiveness, and elasticity decreased significantly as the amount of pine needle powder increased (p<0.001), but adhesion and chewiness increased significantly with an increase in the amount of pine needle powder (p<0.001). Total polyphenol content was significantly increased except for the 8% Jinmal dasik (p<0.001). DPPH and ABTS also increased significantly as the amount of pine needle powder increased (p<0.001). Our sensory evaluation, showed the 2% Jinmal dasik to have the highest degree of preference, however, there was no significant difference among the proportion groups (p=0.053).

아산시 명암리 출토 인골의 미토콘드리아 DNA 분석

김윤지,김수훈,조은민,이정원,Kim, Yun-Ji,Kim, Sue-Hoon,Cho, Eun-Min,Lee, Jeong-won 국립문화재연구소 2015 保存科學硏究 Vol.36 No.-

본 연구는 충청남도 아산시 탕정면 명암리 유적 9지점에서 발굴조사 된 고려 말에서 조선시대 초기 분묘 출토 인골 27개체를 대상으로 고유전학적 연구를 수행한 결과를 보고한 것이다. 실리카 추출 방법에 의하여 출토 인골로 부터 DNA를 추출한 후, 미토콘드리아 DNA(mtDNA)의 과변이지역을 9지역으로 나누어 PCR법에 의해 부분 증폭을 실시하였다. 증폭산물에 대한 염기서열 분석을 통하여 과변이지역의 변이형을 동정하였다. 그 결과 18개체의 mtDNA 분석이 가능하였으며, 아멜로제닌 유전자 분석에 의한 성결정은 M-26, M-29, M-37(L), M-49(R)의 4개체만이 분석되었고 모두 여성인 것으로 확인되었다. In this study, ancient DNA analyses were carried out on the human skeletal remains from a historical cemetery site in Myeongam-ri, Asan, Korea. Human remains of 27 individuals out of tombs from the Goryeo to Joseon Dynasty were selected for the analysis of this study. In order to identify the genealogy of the population and traditional burial pattern of the cemetery, we conducted comparative analyses of the hyper variable regions (HVRs) in mitochondrial DNA (mtDNA) of each sample. We sequenced 9 segmental amplicons of HVRs and assigned relevant haplogroups according to the sequence polymorphism on the basis of the known mtDNA database. As a result, we were analyses 18 human remains of 27 individuals and result of amelogenin analysis were only 4 samples.

철분강화식품 제조기술

김윤지,Kim, Yun-Ji 한국식품연구원 1997 食品技術 Vol.10 No.3

식품안전을 위한 Microbial Risk Assessment 연구 발달과정 및 방법

김윤지,Kim, Yun-Ji 한국식품연구원 2004 食品技術 Vol.17 No.2

해외시찰보고-제 23 차 International EUDRAGIT Worksop 1994 참가기

김윤지,Kim, Yun-Ji 한국식품연구원 1994 食品技術 Vol.7 No.2

Collagen 형성과 Meat Texture

김윤지,Kim, Yun-Ji 한국식품연구원 1994 食品技術 Vol.7 No.4

3차원 실내공간 모델링 원시자료의 활용도 평가

김윤지,유병민,이지영,Kim, Yun Ji,Yoo, Byoung Min,Lee, Jiyeong 한국공간정보학회 2014 한국공간정보학회지 Vol.22 No.6

As the number of people who live indoor space has been increased, the interest in 3D indoor spatial information has been grown. Object-Oriented 3D indoor space modeling including indoor spatial information has performed in level of detail 4, and modeling data is able to be constructed based on various raw data which are as-built drawing, laser scanning, BIM data, and camera. 3D indoor space modeling has been worked based on established indoor space modeling process, and the result can be used for various application fields such as indoor space pedestrian navigation, facility management, disaster management, and so on. However, the modeling process has limitations to perform indoor space modeling efficiently, because the process is complicated and wastes time at modeling work. In this paper, we propose evaluation on practical use of raw data for 3D indoor space modeling purpose on supporting efficient indoor space modeling through analyzing the established process. Therefore, we define the requirements to evaluate the practical use of raw data and propose the verification method. In addition, as-built drawing which has been used in Seoul 3D indoor space modeling project will be applied to proposed method as a raw data. 최근 실내공간에서 활동하는 인구가 증가함에 따라 3차원 실내공간정보에 대한 관심이 높아지고 있다. 실내공간정보를 포함하는 3차원 실내공간 모델링은 LoD 4 (Level of Detail 4) 수준의 객체지향 형태로 수행되고 있으며, 원시자료에 따라 준공도면, 레이저스캐닝, BIM데이터와 카메라를 이용하여 모델링 데이터를 구축할 수 있다. 3차원 실내공간 모델링을 수행하기 위해 정립된 프로세스는 실내공간 모델링 데이터 구축작업의 기반이 되며 구축된 모델링 데이터는 실내공간 보행자 내비게이션, 시설물관리 및 재난관리 등 다양한 어플리케이션에서 활용가능하다. 그러나 정립된 실내공간 모델링 프로세스 기반으로 수행되는 작업이 매우 복잡하고 모델링 작업에 많은 시간이 소비되어 효율적인 모델링을 하는데 한계가 있다. 따라서 본 연구에서는 효율적인 실내공간 모델링 수행 지원을 목적으로 원시자료의 활용도 평가를 제안한다. 기존 3차원 실내공간 모델링 프로세스 분석을 통해 활용도 평가를 위한 필요요건을 정의하고, 검증 방법을 제안한다. 또한 제안된 방법은 서울시 3차원 실내공간 모델링 프로젝트에서 사용된 준공도면을 적용하여 수행한다.

닭고기에서 Salmonella에 대한 Risk Assessment-FAO/WHO 자료를 중심으로-

김윤지,Kim, Yun-Ji 한국식품연구원 2004 食品技術 Vol.17 No.3

CFD에 의한 선박용 DPF/DOC내 배기가스의 유동 균일도 및 특성 연구

김윤지,한단비,백영순,Kim, YunJi,Han, Danbee,Baek, Youngsoon 한국청정기술학회 2019 청정기술 Vol.25 No.2

디젤 선박 운행 횟수의 증가로 인한 대기오염이 심각해짐에 따라 선박의 유해배출가스에 대한 규제가 강화되고 있다. 따라서 선박용 디젤 배기 후처리 장치의 개발이 요구되고 배기 처리 장치는 유동 균일도가 높을수록 처리효율이 증가된다. 본 연구에서는 ANSYS Fluent를 이용하여 기존 저감장치, 저감장치 내부의 Baffle 설치시, 배기가스 유량에 따른 배압과 유동 균일도를 시뮬레이션 하였다. 기존 장치조건에서는 시스템 배압이 38 ~ 40 mbar로 나타났으며, 유동 균일도는 DOC 입구와 출구에서 약 84 ~ 92%로 나타났다. 시스템 내부에 Baffle을 설치한 경우 압력이 상승되고 유속 증가로 인해 유동 균일도가 낮아진다. 배기가스 유량을 $7,548kg\;h^{-1}$에서 $3,772kg\;h^{-1}$로 50% 감소했을 때, 낮은 유속에 의해 DOC 입구와 출구의 유동 균일도는 약 1 ~ 3% 증가했다. DPF의 경우 불균일한 유동이 DOC를 균일하게 거쳐 흐른 후 유입되기 때문에 유동 균일도가 98 ~ 99%로 높게 나타났다. As air pollution becomes more serious due to the increased number of diesel vessel operations, ship regulations on harmful emissions strengthen. Therefore, the development of a diesel exhaust after-treatment system for ships is required, and the higher the flow uniformity of the exhaust treatment system, the higher the treatment efficiency. With the computer software ANSYS Fluent, pressure drop and flow uniformity were used in this study to simulate flow rate with and without a baffle in both a Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF) system. The system pressure drop was found to be 38 to 40 mbar in the existing system condition, and the flow uniformity was approximately 84 to 92% at the inlet and outlet of the DOC. When the baffle was installed inside the system, the pressure increased and the flow uniformity was lowered due to an increase in flow rate. When the exhaust gas flow was reduced by 50% from $7,548kg\;h^{-1}$ to $3,772kg\;h^{-1}$, the flow uniformity at the inlet and outlet of the DOC increased by approximately 1 to 3% due to the low flow rate. In the case of DPF, the flow uniformity of exhaust gas was 98 to 99% because the uneven flow proceeded after uniformly flowing from the DOC.