미용 티슈 제품 표면 softness의 프랙탈 차원 분석

이지민(Ji Min Lee국민대학교),이용주(Yong Ju Lee),문병근(Byoung Geun Moon),김형진(Hyoung Jin Kim) 한국펄프·종이공학회 2023 펄프.종이기술 Vol.55 No.6

Dental Treatment in a Patient with CINCA Syndrome under General Anesthesia

이지민,송지수,현홍근,김영재,김정욱,장기택,이상훈,신터전,Lee, Ji Min,Song, Ji-Soo,Hyun, Hong-Keun,Kim, Young-Jae,Kim, Jung-Wook,Jang, Ki-Taeg,Lee, Sang-Hoon,Shin, Teo Jeon Korean Academy of Pediatric Dentistry 2018 大韓小兒齒科學會誌 Vol.45 No.1

Chronic infantile neurological cutaneous articular (CINCA) 증후군은 만성 염증성 질환으로, 주기적으로 발열을 일으킨다. 이 증후군의 환아들은 전신적인 염증으로 인해 치과적 문제에 노출되기 쉽다. 협조가 어려운 환자에 있어서 전신마취는 행동 조절 방법으로 널리 사용되어 왔으며, CINCA 증후군의 경우 전신적인 염증성 질환이기 때문에 전신마취를 시행할 때 있어 주의를 기울어야 한다. 본 증례 보고에서는 CINCA 증후군을 가진 비협조적 환아를 전신마취 하 치과 치료 시행한 증례보고와 함께 이러한 환아들에서 치과치료 전 고려사항을 고찰하고자 한다. Chronic infantile neurological cutaneous articular (CINCA) syndrome periodically causes fever along with inflammation in multiple organs. Patients with this condition are vulnerable to dental problems due to systemic inflammation. For uncooperative patients, general anesthesia has been widely used to control negative behavior. However, caution should be exercised when administering general anesthesia in these patients because this syndrome is pro-inflammatory. The present case report describes the clinical considerations of the dental treatment of an uncooperative child with CINCA syndrome who was treated under general anesthesia.

정보이론을 이용한 농촌마을 권역화 연구

이지민,이정재,Lee, Ji-Min,Lee, Jeong-Jae 한국농공학회 2007 한국농공학회논문집 Vol.49 No.1

Classification results of rural villages provide useful information about rural village characteristics to select similar villages in rural development project; many researches about regional classification have been practiced. Recently rural amenity was introduced as an alternative for rural development, and rural villages have been surveyed to find potential resources for rural development by 'Rural Amenity Resources Survey Project'. Accumulated information through this survey project could be used to classify rural villages. However existing rural classification method using statistical data is not efficient method to use rural amenity resources information described with text. We introduced Information Bottleneck Method (IBM) based on information theory and implemented this method to classification with rural amenity resources information of Yanggang-myen, Yeongdong-gun in Chungbuk province.

고경도 철계 장갑재의 미세조직과 기계적 특성 분석

이지민,한종주,송영범,함진희,김홍규,황병철,Lee, Ji-Min,Han, Jong-Ju,Song, Young-Beum,Ham, Jin-Hee,Kim, Hong-Kyu,Hwang, Byoungchul 한국재료학회 2018 한국재료학회지 Vol.28 No.8

This paper presents a study of the microstructure and mechanical properties of commercial high-hardness armor (HHA) steels tempered at different temperatures. Although the as-received specimens of all the steels exhibit a tempered martensite structure with lath type morphology, the A steel, which has the smallest carbon content, had the lowest hardness due to reduced solid solution hardening and larger lath thickness, irrespective of tempering conditions. As the tempering temperature increases, the hardness of the steels steadily decreases because dislocation density decreases and the lath thickness of martensite increases due to recovery and over-aging effects. When the variations in hardness plotted as a function of tempering temperature are compared with the hardness of the as-received specimens, it seems that the B steel, which has the highest yield and tensile strengths, is fabricated by quenching, while the other steels are fabricated by quenching and tempering. On the other hand, the impact properties of the steels are affected by specimen orientation and test temperature as well as microstructure. Based on these results, the effect of tempering on the microstructure and mechanical properties of commercial high-hardness armor steels is discussed.

등온 열처리에 따른 중탄소 베이나이트강의 미세조직과 기계적 특성

이지민,이상인,임현석,황병철,Lee, Ji-Min,Lee, Sang-In,Lim, Hyeon-Seok,Hwang, Byoungchul 한국재료학회 2018 한국재료학회지 Vol.28 No.9

This study investigates the effects of isothermal holding temperature and time on the microstructure, hardness and Charpy impact properties of medium-carbon bainitic steel specimens. Medium-carbon steel specimens with different bainitic microstructures are fabricated by varying the isothermal conditions and their microstructures are characterized using OM, SEM and EBSD analysis. Hardness and Charpy impact tests are also performed to examine the correlation of microstructure and mechanical properties. The microstructural analysis results reveal that granular bainite, bainitic ferrite, lath martensite and retained austenite form differently in the specimens. The volume fraction of granular bainite and bainitic ferrite increases as the isothermal holding temperature increases, which decreases the hardness of specimens isothermally heat-treated at $300^{\circ}C$ or higher. The specimens isothermally heat-treated at $250^{\circ}C$ exhibit the highest hardness due to the formation of lath martensite, irrespective of isothermal holding time. The Charpy impact test results indicate that increasing isothermal holding time improves the impact toughness because of the increase in volume fraction of granular bainite and bainitic ferrite, which have a relatively soft microstructure compared to lath martensite for specimens isothermally heat-treated at $250^{\circ}C$ and $300^{\circ}C$.

SWAT모형을 이용한 유량 및 유사 예측 정확성 평가 및 최적관리 기법 효과 분석

이지민,류지철,강현우,강형식,금동혁,장춘화,최중대,임경재,Lee, Ji-Min,Ryu, Ji-Chul,Kang, Hyun-Woo,Kang, Hyeong-Sik,Kum, Dong-Hyuk,Jang, Chun-Hwa,Choi, Joong-Dae,Lim, Kyoung-Jae 한국농공학회 2012 한국농공학회논문집 Vol.54 No.1

Soil erosion and sediment from agricultural farmland has caused various negative impacts on environment in recent years. The effect of rice straw mat on soil erosion has been investigated by many researchers these days. In this study, the SWAT model was applied to Hongcheon watershed to evaluate SWAT flow and sediment, and the effect of rice straw mat on sediment yield at watershed outlet was evaluated. The Nash-Sutcliffe model efficiency (NSE) and coefficient of determination ($R^2$) values for flow simulation (calibration period) were 0.66 and 0.67, and the NSE values for sediment was 0.90. The calibrated parameters were used to analyze the reduction of sediment yield in the farmland with rice straw mat. Average daily sediment yield without rice straw mat was 49.8 ton/day and sediment yield with rice straw mat was 25.5 ton/day, and the reduction rate was 38.7 %. Also, average daily sediment yield with/without rice straw mat were 97.5 ton/day and 190.7 ton/day during the rainy season (Jun. 2008 - Aug. 2009), with the reduction rate 46.3 %.

국내외 지속 가능한 친환경 화장품 패키지 사례 연구

이지민,김승인,Lee, Ji-Min,Kim, Seung-In 한국디지털정책학회 2020 디지털융복합연구 Vol.18 No.9

This study is cases study of sustainable eco-friendly cosmetics packages. The importance of eco-friendly packages has been increasing as environmental issues have recently emerged around the world. Domestic cosmetics industry are releasing sustainable package designs with these changes, but they are limited. In this study, sustainable package criteria were divided and analyzed based on each of the five prior studies of domestic and foreign cases. Studies have confirmed that there is no diversity in the materials and designs of sustainable packages in Korea compared with other countries. Also, it could be seen that there was the lack of consumer-led eco-friendly campaigns. Starting point of research, it is expected that this study may help continue to study better sustainable cosmetics packages in the future. 본 연구는 지속 가능한 친환경 화장품 패키지에 관한 사례 연구이다. 최근 전 세계적으로 환경 문제가 대두되면서 친환경 패키지의 중요성이 높아지고 있다. 국내 화장품 업계는 이러한 변화에 발맞춰 지속 가능한 패키지 디자인을 출시하고 있지만, 한정적이다. 본 연구에서는 국내외 사례 각 5가지 선행 연구를 바탕으로 지속 가능한 패키지 기준을 나누어 분석하였다. 연구 결과 국내에는 국외와 비교하여 지속 가능 패키지의 소재와 디자인이 다양하지 않다는 것을 확인하였다. 또한, 소비자 주도의 친환경 캠페인이 부족하다는 것을 알 수 있었다. 이 연구를 기점으로 삼아 앞으로 더 나은 지속 가능한 화장품 패키지에 대한 연구가 계속해서 이루어지기를 기대한다.

한국산 복모류 (복모동물문)의 계통분류학적 연구

이지민,장천영,Lee, Ji-Min,Jang, Cheon-Yeong 한국통합생물학회 2004 Korean journal of biological sciences Vol.8 No.S

알쯔하이머형 치매 환자에서 행동심리증상과 호모시스테인과의 연관

이지민,임우영,김현,이강준,Lee, Ji Min,Im, Woo-Young,Kim, Hyun,Lee, Kang Joon 한국정신신체의학회 2014 정신신체의학 Vol.22 No.1

연구목적 호모시스테인은 인지기능의 손상과 다양한 정신과 증상들과 연관되어 있다. 본 연구는 혈중 호모시스테인 농도와 치매의 행동심리증상 사이에 연관성을 검증하기 위해서 시행되었다. 방법 DSM-IV에 의해 알쯔하이머형 치매로 진단된 환자 41명의 혈중 호모시스테인, 엽산, 비타민 $B_{12}$ 농도를 측정하였다. 그리고 병력청취, 신체검사와 간이정신상태기능검사(MMSE), 전반적 퇴화척도(GDS), 임상치매 평가척도(CDR), 한국형 신경정신행동검사(K-NPI)를 수행하였다. 결과 호모시스테인 농도와 NPI 총 점수 사이에 통계적으로 유의한 양의 상관관계가 관찰되었고 망상, 초조/공격성, 우울/불쾌, 들뜸/흥분과 같은 여러 하위항목과도 양의 상관관계가 관찰되었다. 호모시스테인 농도와 MMSE, GDS, CDR 점수 사이에는 유의한 상관관계가 관찰되지 않았다. 결론 본 연구는 혈중 호모시스테인 농도가 치매의 행동심리증상과 연관되어 있음을 보여준다. 추가적인 연구를 통하여 이와 연관된 병태생리학적 기전을 밝히는 것이 필요하다. Objectives : Homocysteine has been associated with cognitive impairment and various psychiatric symptoms. This study was designed to examine the relationship exists between plasma homocysteine concentration and behavioral and psychological symptoms of dementia(BPSD). Methods : 41 subjects with dementia of Alzheimer's type were included in this study. We carried out history taking, physical examination, and cognitive assessment for the diagnosis of dementia of Alzheimer's type based on DSM-IV. We scored the Mini Mental State Examination(MMSE), Global Deterioration Scale(GDS), Clinical Dementia Rating(CDR), and the Korean Neuropsychiatric Inventory(K-NPI). We also measured levels of homocysteine, folate, and vitamin $B_{12}$ in the plasma. Results : We found statistically significant positive correlations between homocysteine concentration with NPI total score, and with scores of several sub-domains such as delusion, agitation/aggression, depression/dysphoria, and elation/euphoria. No significant correlation existed between homocysteine levels and scores of MMSE, GDS, and CDR. Conclusions : This study shows that plasma homocysteine levels are associated with BPSD. Further research is necessary to identify pathophysiologic mechanisms underlying these relationships.

미래 농업·농촌을 위한 농업·농촌데이터 현황 분석 및 제언

이지민,Lee, Ji-Min 한국농공학회 2017 韓國農工學會誌 : 전원과 자원 Vol.59 No.4