다중비중선별기를 이용한 광물찌꺼기로부터 비소제거 연구

김준희,김민규,김우람,한오형,Kim, Jun-Hee,Kim, Min-Gyu,Kim, Woo-Ram,Han, Oh-Hyung 한국자원리싸이클링학회 2014 資源 리싸이클링 Vol.23 No.5

광물찌꺼기에는 다양한 종류의 중금속이 함유되어 있어, 국내외에서 광물찌꺼기로부터 중금속을 제거하기 위해 많은 연구가 이루어졌으나, 중금속을 제거하기에는 여러 가지 문제점과 제약이 따르기 때문에 한계가 있었다. 따라서 이를 해결하고자 본 연구에서는 미립자의 선별까지도 가능한 다중비중선별기(Multi-gravity separator, MGS)를 사용하여 광물찌꺼기에 함유된 비소를 제거하기 위한 비중선별실험을 수행하였다. MGS를 이용하여 비중선별에 의해 비중이 높은 비소를 함유한 광물을 제거하고자 경사각, 세척수량, 광액농도, 드럼의 회전속도, 급광량에 따른 영향을 확인하였다. 실험결과 최적실험 조건인 MGS의 경사각 $3^{\circ}$, 세척수량 5 l/min., 광액농도 30%, 드럼 회전속도 208 rpm, 그리고 급광량 265.24 g/min. 에서 As 제거율과 산출율이 각각 88.21%와 92.25%인 결과를 얻었다. It comtained various kinds of heavy metal in beneficiatian tailing and in order to eliminate the heavy metals, various technologies have been researched, But there are a limits because many problems and restrictions are accompanied. Therefore, in this study, in order to solve this problem, It was performed gravity separation using melti-gravity seperator (MGS) to remove As contained in tailing, which can sort out even the fine particle. It was attempted a study to remove As, which is a kind of heavy metals, by MGS gravity separation and verified the impact by slope, wash water, pulp density, rotational speed and feed rate. In the results of performing gravity concentration under the condition with the MGS slope of $3^{\circ}$, wash water of 5 l/mm, pulp density of 30%, rotational speed of 208 rpm, and the feed rate of 265.24 g/mm, the As removal rate of 88.21% and yield of 92.25% were obtained.

CBCT 및 3D CT를 활용한 상악 유구치 치근과 근관 형태

김준희,김현태,신터전,현홍근,김영재,김정욱,장기택,송지수,Kim, Joon Hee,Kim, Hyuntae,Shin, Teo Jeon,Hyun, Hong-Keun,Kim, Young-Jae,Kim, Jung-Wook,Jang, Ki-Taeg,Song, Ji-Soo 대한소아치과학회 2021 大韓小兒齒科學會誌 Vol.48 No.4

이 연구의 목적은 상악 유구치의 치근 및 근관의 형태학적 특성을 분석하는 것이다. 2006년 1월부터 2020년 4월까지 서울대학교 치과병원에서 CBCT 및 3D CT를 촬영한 3 - 7세 환자 총 268명(남자 175명, 여자 93명)이 연구에 포함되었으며, 치근 흡수와 치수병변이 없는 총 1002개의 상악 유구치의 치근과 근관 수를 분석하였다. 218개의 치아에 대해 치근과 근관의 형태, 이개각도, 치근과 근관의 길이 및 근관의 단면 형태를 분석하였다. 48개의 치아에 대해서는 Mimics 및 3-Matics software를 사용하여 치근 치수의 부피와 표면적, 치근-치수 비를 측정하였다. 절반 이상이 3개의 치근과 3개의 근관을 가지고 있었다. 좌우측 치아의 대칭성(Cohen's kappa coefficient)은 약 0.63이었다. 치근과 근관의 형태는 상악 제1유구치에서는 직선형이, 제2유구치에서는 곡선형이 많이 관찰되었다. 치근의 이개 정도, 치근과 근관의 길이는 상악 제1, 2유구치 모두 구개측 치근에서 가장 크게 나타났다. 근단부에서 근관의 단면 형태는 주로 ovoid 혹은 round형이었다. 치근 치수의 부피와 표면적, 치근-치수 비는 상악 제1,2유구치 모두 구개측 치근 치수에서 가장 크게 나타났다. The purpose of this study is to analyze morphological characteristics of maxillary primary molar's root and root canal. 268 children aged 3 - 7 years (175 boys, 93 girls) who had CBCT (152 children) and 3D CT (116 children) taken in Seoul National University Dental Hospital from January 2006 to April 2020 were included. The number of roots and root canals were analyzed in 1002 teeth without any root resorption or periapical pathologies. Curvature, angulation, length of root and root canal, as well as cross-sectional shapes of the root canal were analyzed in 218 teeth. By using Mimics and 3-Matics software, volume, surface area, and volume ratio of root canal was analyzed in 48 teeth. More than half of maxillary primary molars have 3 roots and 3 root canals. The degree of symmetry of root canal type was about 0.63 (Cohen's kappa coefficient). The most frequent shape of roots and canals was linear in 1^st primary molars and curved in 2^nd primary molars. Angulation, length of root and root canals was the largest on palatal roots. Most teeth showed ovoid or round shapes at apex. The largest root canal volume, surface area, volume ratio was found in the palatal roots.

「규합총서(閨閤叢書)」에 수록된 떡의 종류 및 조리법에 대한 고찰

김준희,정항진,오왕규,Kim, Jun-Hee,Jeong, Hang-Jin,Oh, Wang-Kyu 한국식품영양학회 2012 韓國食品營養學會誌 Vol.25 No.4

본 연구는 조선 후기 고문헌인 "규합총서(閨閤叢書)"에 나타난 떡의 종류 및 조리방법을 고찰하여 떡의 종류, 떡에 사용된 재료, 떡의 조리법에 대한 내용을 정리하여 전통조리법을 이해하고, 현재의 기호와 식생활에 맞게 재창조하는 데 필요한 문헌적 자료를 제공하고자 함을 목적으로 한다. "규합총서(閨閤叢書)"는 조선시대 빙허각 이씨가 한글로 쓴 가정대백과 전서이다. '주식의편'에 요리법을 소개하고 있으며, 떡의 분류와 함께 28종의 떡이 기록되어 있다. 연구방법은 내용분석 방법(Contents Analysis)을 이용하였다. 떡을 조리형태에 따라 분류하면 찌는 떡 15가지(53.5%), 치는 떡 2종류(7.1%), 삶는 떡3종류(10.7%), 지지는 떡 7가지(25%), 기타 1가지(3.5%)로 찌는 떡이 53.5%로 가장 많았다. 떡의 주재료에 따라 분류한 결과, 찹쌀이 13회, 멥쌀이 10회, 기타가 5회로 나타났다. 떡의 주재료로는 찹쌀이 12회(42.8%), 멥쌀이 10회(35.7%), 기타가 6회(21.4%)로 찹쌀이 멥쌀보다 많이 사용한 것으로 나타났다. 부재료는 꿀, 잣, 대추 순으로 많이 사용하였고, 연육, 검인, 수시, 생마, 송기, 백봉령 등 약제도 부재료로 사용되었다. Rice cake is the most historical food which has been developed from settlement of agriculture and typical traditional food which has manufacture and food historical meaning. Because, the process of rice flour, raw ingredient of rice cake, tells remarkable food processing technology of our nation, and is original form of processed food that we has been taken before agricultural life begun. In this study, contents analysis method is used. Ingredients of rice cakes appeared in "Gyuhapchongseo" glutinous rice 12 times (42.8%), nonglutinous rice 10 times (35.7%), and the others 6 times (21.4%) used as the main ingredients of rice cake. the rice cake separated into 15 types (53.5%) of steamed rice cake, 2 types (7.1%) of pounded rice cake, 3 types (10.7%) of boiled rice cake, 7 types (25%) of sauteed rice cake, and 1 types (3.5%) of the others. it become data for knowing social and dietary culture of the time. And it is for presenting fundamental material of possibility of modern rice cake.

MEDLINE 검색을 통한 산업안전보건 분야에서의 인간공학 연구동향 : 워드임베딩을 활용한 초록 단어 모델링을 중심으로

김준희,황의재,안선희,곽경태,정성훈,Kim, Jun Hee,Hwang, Ui Jae,Ahn, Sun Hee,Gwak, Gyeong Tae,Jung, Sung Hoon 한국안전학회 2021 한국안전학회지 Vol.36 No.5

This study aimed to analyze the research trends of the abstract data of ergonomic studies registered in MEDLINE, a medical bibliographic database, using word embedding. Medical-related ergonomic studies mainly focus on work-related musculoskeletal disorders, and there are no studies on the analysis of words as data using natural language processing techniques, such as word embedding. In this study, the abstract data of ergonomic studies were extracted with a program written with selenium and BeutifulSoup modules using python. The word embedding of the abstract data was performed using the word2vec model, after which the data found in the abstract were vectorized. The vectorized data were visualized in two dimensions using t-Distributed Stochastic Neighbor Embedding (t-SNE). The word "ergonomics" and ten of the most frequently used words in the abstract were selected as keywords. The results revealed that the most frequently used words in the abstract of ergonomics studies include "use", "work", and "task". In addition, the t-SNE technique revealed that words, such as "workplace", "design", and "engineering," exhibited the highest relevance to ergonomics. The keywords observed in the abstract of ergonomic studies using t-SNE were classified into four groups. Ergonomics studies registered with MEDLINE have investigated the risk factors associated with workers performing an operation or task using tools, and in this study, ergonomics studies were identified by the relationship between keywords using word embedding. The results of this study will provide useful and diverse insights on future research direction on ergonomic studies.

Electrospun badger (Meles meles) oil/Ag nanoparticle based anti-bacterial mats for biomedical applications

김준희,김철상,박찬희,Afeesh Rajan Unnithan,kim han joo,Arjun Prasad Tiwari 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.30 No.-

In this study, silver nanoparticles and badger oil were embedded into nanofibrous polyurethane (PU)mat via electrospinning. Badger oil is mainly composed of fatty acids and is used as a traditional medicine to heal wounds and the silver nanoparticles contribute to the wound healing process by reducing wound contamination. The composite mats exhibited good bactericidal activity against both of Gram positive and Gram negative bacteria. with better cell attachment and proliferation. The results of this study indicate that the proposed composite mats can be used for various biomedical purposes, including as dressing for burn wounds or to treat skin disease.

연구논문 - 촉매분과 : 수성가스 전환반응용 CoMo 촉매의 활성에 미치는 알칼리 금속염의 영향

김준희,이호인 ( Joon Hee Kim,Ho In Lee ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1990 No.3

N/A Effects of alkali metals and anions on CoMo catalysts for water gas shift reaction were studied. For CoMo/γ-Al₂O₃ catalysts made by impregnation, the doping of alkali metals like lithium enhanced the activity. For K-doped catalysts made with the potassium salts having different anions, the activity increased with increasing BET surface area. Among the catalysts prepared by nitrates as precursor, Li-doped catalyst showed the best activity, and the others did not make significant differences giving a relatively low activity. Both BET surface area and TPR did not show significant differences in the catalysts doped with alkali metals in the form of nitrates. However, the activity of the Li-doped catalyst was remained relatively constant with the amount of Li doped, whereas those of other catalysts changed with the amount of Li doped.

단국대학교 LINC+ 4차산업혁명 혁신선도대학 사업단 소개

김준희,Kim, Jun-Hui 한국전산구조공학회 2019 전산구조공학 Vol.32 No.2

고장력 열처리한 Poly(ethylene 2,6-naphthalene dicarboxylate) 섬유의 미세구조와 물성

김준희,조현혹,Kim Joon Hee,Cho Hyun Hok 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.1

PEN fibers spun at 4 km/min by high speed melt-spinning were treated by two methods, constant length annealing (CLA) and high tension annealing (HTA) at 130, 160, 190, and $220^{\circ}C$. The fine structure and physical properties of the PEN fibers were investigated with various techniques such as wide-angle X-ray diffraction, DSC thermo-grams, density, birefringence, tensile test etc. As the annealing temperatures is increased, a partial transition of the crystal structure, from $\beta$ form crystal to $\alpha$ form crystal appeared in the WAXD test in case of CLA treatment. But, in case of HTA treatment, the transition of the crystal form from $\beta$ form crystal to $\alpha$ form crystal appeared dominantly. As the annealing temperature and tension increases, the melting peaks become sharper in DSC thermograms. Density of PEN fibers from HTA treatment is lower than that from CLA treatment, but birefringence and initial modulus of the PEN fibers from HTA treatment are much higher than those from CLA treatment. But, shrinkage of the PEN fibers from HTA treatment is higher than that from CLA treatment.

포장 폐기물 정책과 친환경 포장 관리 제도 - 친환경 포장 인증제도를 중심으로 -

김준희,Kim, Jun-Hui (사)한국포장협회 2013 包裝界 Vol.248 No.-

워드임베딩을 활용한 복압성 요실금 관련 연구 동향에 관한 융합 연구

김준희,안선희,곽경태,원영수,유화익,Kim, Jun-Hee,Ahn, Sun-Hee,Gwak, Gyeong-Tae,Weon, Young-Soo,Yoo, Hwa-Ik 한국융합학회 2021 한국융합학회논문지 Vol.12 No.8

본 연구의 목적은 '복압성 요실금'을 키워드로 검색된 연구들의 경향과 특성을 단어 빈도를 통해 분석하고, 워드 임베딩을 사용하여 그 관계를 모델링 하고자 하였다. 의학 서지 데이터베이스인 MEDLINE에 등록되어 있는 복압성 요실금 연구 9,868개 논문들의 초록 문자 데이터를 Python 프로그램을 이용하여 추출하였다. 그런 다음 빈도 분석을 통해 10개의 키워드를 선택하였다. 키워드 관련 단어들의 유사도는 Word2Vec 머신러닝 알고리즘으로 분석하였다. 그리고, t-SNE 기법을 사용하여 단어의 위치와 거리가 시각화하였고, 이에 따라 그룹을 분류하여 이를 분석하였다. 복압성 요실금과 관련된 연구는 1980년대 이후 빠르게 증가했다. 키워드 분석을 통해 논문 초록에서 가장 많이 사용된 키워드는 '여성', '요도', '수술'로 나타났다. Word2Vec 모델링을 통해 복압성 요실금 관련 연구에서 주요 키워드들과 가장 높은 연관성을 나타내는 단어들에는 '여성', '절박', '증상' 등이 있었다. 그리고, t-SNE 기법을 통해 키워드와 관련 단어들은 복압성 요실금의 증상, 신체 기관의 해부학적 특성, 그리고 수술적 중재를 중심으로 하는 3개의 그룹으로 분류될 수 있었다. 본 연구는 초록을 구성하는 단어들의 키워드 빈도 분석 및 워드임베딩 방식을 이용하여 복압성 요실금 관련 연구들의 동향을 살펴본 최초의 연구이다. 본 연구의 결과는 향후 연구자들이 복압성 요실금 관련 연구 분야의 주제와 방향성을 선택하는 데 있어 기초자료로 활용될 수 있을 것이다. The purpose of this study was to analyze the trends and characteristics of 'stress urinary incontinence' research through word frequency analysis, and their relationships were modeled using word embedding. Abstract data of 9,868 papers containing abstracts in PubMed's MEDLINE were extracted using a Python program. Then, through frequency analysis, 10 keywords were selected according to the high frequency. The similarity of words related to keywords was analyzed by Word2Vec machine learning algorithm. The locations and distances of words were visualized using the t-SNE technique, and the groups were classified and analyzed. The number of studies related to stress urinary incontinence has increased rapidly since the 1980s. The keywords used most frequently in the abstract of the paper were 'woman', 'urethra', and 'surgery'. Through Word2Vec modeling, words such as 'female', 'urge', and 'symptom' were among the words that showed the highest relevance to the keywords in the study on stress urinary incontinence. In addition, through the t-SNE technique, keywords and related words could be classified into three groups focusing on symptoms, anatomical characteristics, and surgical interventions of stress urinary incontinence. This study is the first to examine trends in stress urinary incontinence-related studies using the keyword frequency analysis and word embedding of the abstract. The results of this study can be used as a basis for future researchers to select the subject and direction of the research field related to stress urinary incontinence.