조성변화에 따른 PECVD SiON 박막의 물성특성

조유정,한길진,김영철,서화일,Cho Yu Jung,Han Kil Jin,Kim Yeong Cheol,Seo Hwa Il 한국반도체디스플레이기술학회 2005 반도체디스플레이기술학회지 Vol.4 No.3

Silicon oxynitride films were deposited using ammonia as a nitrogen source via PECVD (plasma enhanced chemical vapor deposition) to study the physical properties of the films. Silane and nitrous oxide were used as silicon and oxygen sources, respectively. The composition of the silicon oxynitride films was well controlled by changing the ratios of the sources and confirmed by XPS. The silicon oxynitride films with high oxygen content showed bigger compressive stress and less refractive index, while the values of surface roughness were around 1 nm, irrespective of the variation of the source ratios.

원저 : 비만 초등학생들의 자아존중감 및 불안에 대한 고찰

조유정 ( Yu Jeong Cho ),김은주 ( Eun Joo Kim ),조재흥 ( Jae Heung Cho ),정원석 ( Won Seok Jung ),송미연 ( Mi Yeon Song ) 한방비만학회 2010 한방비만학회지 Vol.10 No.1

This study was performed to figure out relations of self-esteem, anxiety and the other factors related with obesity in obese children. Methods Forty-two children(21 boys and 21 girls) those who were diagnosed obesity have been recruited. To assess psychological factors, Self-esteem inventory(SEI), Revised Children``s Manifest Anxiety Scale(RCMAS), International Physical Activity Questionnaires(IPAQ), Korean Eating Attitudes Test(KEAT-26) and Children``s Depression Inventory(CDI) were administered. Behavioral characteristics were also analyzed. Results Self-esteem(SEI) had significant positive relationship with physical activity(IPAQ) and sleeping time. Self-esteem had significant negative relationship with anxiety(RCMAS), eating disorder(KEAT-26) and watching TV time. Anxiety had significant positive relationship with eating disorder(KEAT-26) and watching TV time, and negative relationship with physical activity(IPAQ) and sleeping time. All of participants seemed to be having depressive tendency. Conclusion Self-esteem and anxiety were significantly related. And eating disorder, physical activity, sleeping time and watching tv also affected to the self-esteem and anxiety of obese children.

한국 비만 여성에서 비만 치료 전 후의 심리적 상관관계 분석

조유정 ( Yu Jeong Cho ),이아라 ( A Ra Lee ),정원석 ( Won Seok Jung ),송미연 ( Mi Yeon Song ) 한방재활의학과학회 2009 한방재활의학과학회지 Vol.19 No.1

Objectives: Psychological comorbidities are high in patients with obesity and are associated with a variety of medical and dietary problems. This study aims to examine the association between psychological factors and obesity. Methods: This study was performed in pre-menopausal obese(BMI ≥ 25 kg/m2, waist circumference ≥85 cm) women in Seoul, in 2008 (n=35). Every patient underwent the obesity treatment program. The program included dietary and exercise education, and abdominal mesotherapy for 6 weeks. Simple anthropometry including weight, BMI and Computed Tomography (CT) including Subcutaneous adipose tissue (SAT), Visceral adipose tissue (VAT) and Visceral adipose tissue/Subcutaneous adipose tissue ratio (VSR) were done. To assess psychological factors, the Rosenberg self-esteem scale (SES) questionnaire, Beck depression inventory (BDI) questionnaire and stress response inventory(SRI) questionnaire were administered. Results: 1. All of the obesity indicators (except VSR) decreased significantly after the obesity treatment program. 2. There was a significant relationship between self esteem (SES score) and visceral obesity (VAT and VSR) measured at the end of the program. 3. During the intervention, the more weight, BMI, and subcutaneous adipose tissue decreased, the more self-esteem (SES) increased. There was no relationship between depression (BDI) and obesity. And the change in stress response (SRI) was associated with the change of deep subcutaneous adipose tissue and total abdominal adipose tissue. Conclusions: This study proves that visceral obesity may contribute to low self-esteem, and there is a possibility that the other psychological factors could also be related with obesity in Korean obese women. Individualised antiobesity therapy may be required depending on the patient`s psychological characteristics and weight loss could be helpful in order to treat psychological problem in obese patients.

Hydroxypropyl cellulose/TEMPO-산화 처리된 셀룰로오스나노섬유를 이용한 복합필름의 기계적 및 열적 특성

조유정 ( Yu Jeong Jo ),조혜정 ( Hye Jung Cho ),전상진 ( Sang Jin Chun ),이선영 ( Sun Young Lee ) 한국목재공학회 2015 목재공학 Vol.43 No.6

본 연구에서는 HPC (hydroxypropyl cellulose)와 TEMPO 산화된 셀룰로오스 나노섬유(Tempo-oxidized cellulose nanofibrils, TOCN)가 보강된 복합필름을 제조하였다. 복합필름의 기계적, 열적 특성을 관찰하기 위해 인장강도 및 열중량 분석기(TGA)를 측정하였다. HPC/TOCN 복합필름에서 TOCN의 함량이 1 wt%에서 5 wt%까지 증가할수록 인장강도와 인장탄성계수는 직선적으로 증가하는 경향을 보였다. 그러나 TGA 분석 결과, TOCN의 함량에 관계없이 HPC/TOCN 복합필름의 열 안정성은 거의 차이가 없었다. Hydroxypropyl cellulose (HPC) composite films filled with TEMPO-oxidized cellulose nanofibrils (TOCN) were prepared in this study. In order to investigate mechanical and thermal properties of HPC/TOCN composite films, tensile strength and thermogravimetric analysis (TGA) wer performed. As the loading level of TOCN increased, the tensile strength and modulus increased significantly. However, thermal stability of HPC/TOCN composite films was not related to the loading levels of the TOCN.

원저 : 과체중인 소아에 있어서 아이라진 복용의 효과

조유정 ( Yu Jeong Cho ),김은주 ( Eun Joo Kim ),양유정 ( You Jung Yang ),송미연 ( Mi Yeon Song ) 한방비만학회 2010 한방비만학회지 Vol.10 No.1

This study was performed to figure out the effects of I-razin in overweight children without any exercise or specific diet. Methods Twenty-eight children those who were diagnosed overweight have been recruited. They were randomly assigned treatment or control group under block randomization. Treatment group were treated with I-razin for 8 weeks, and control group were treated with placebo medication under same conditions. Anthropometry, fat computed tomography and blood test have been done before and after the treatment. Results Eleven subjects in treatment group and seventeen in control group were evaluated. BMI, waist circumference, glucose, total cholesterol, and triglyceride were decreased in the treatment group. And reduction of BMI, glucose, and triglyceride in the treatment group were greater than control group. But there was no statistically significance. No side effects have been notice during the study period and no adverse effect on liver has been observed. Conclusion This study could not demonstrate effect of I-razin compared with control group. However, treatment group has a tendency of weight loss without side effect. Additional studies with large population are thought to be necessary to clarify the effect of I-razin.

니켈 실리사이드의 열안정성에 대한 실리카 상부막과 코발트 중간막의 영향

한길진,조유정,김영철,오순영,김용진,이원재,이희덕,Han Kil Jin,Cho Yu Jung,Kim Yeong Cheol,Oh Soon Young,Kim Yong Jin,Lee Won Jae,Lee Hi Deok 한국반도체디스플레이기술학회 2005 반도체디스플레이기술학회지 Vol.4 No.2

[ $SiO_{2}$ ] or SiON is usually deposited and annealed after formation of silicide in real transistor fabrication processes. Nickel silicide and nickel silicide with Co interlayer were annealed at 650$^{\circ}C$ for 30 min with silica top layer in this study to investigate its thermal stability. SEM, XPS, and FPP(four point probe) were employed for the investigation. Nickel silicide with Co interlayer showed improved thermal stability. Co interlayer seems to play a key role to the stability of nickel silicide.

국가표준식품성분 데이터베이스 대표시료 선정을 위한 표본설계

김진흠,황해원,조유정,박진우,Kim, Jinheum,Hwang, Hae-Won,Cho, Yu Jung,Park, Jinwoo 한국통계학회 2020 응용통계연구 Vol.33 No.2

농촌진흥청에서는 식품산업진흥법 제19조 제1항에 의거하여 국가표준식품성분표를 5년 주기로 발표하고 있다. 본 논문에서는 2021년 국가표준식품성분표 제10개정판 발간을 앞두고 우리나라 국민들이 많이 소비하고 있는 식품으로 선정된 182개 식품의 대표시료를 합리적이고 과학적으로 추출하기 위한 방안을 제안하였다. 농수산물을 포함한 식품을 판매하는 식료품점을 유통형태에 따라 대형마트와 전통시장으로 구분한 후 NFNAP에서 제안한 층화다단추출법을 각각 적용하여 8개 표본을 추출하였다. NFNAP는 미국인들이 소비하고 있는 식료품의 성분표에 대한 신뢰성 있는 추정을 담보하기 위해 미국 농무성과 국립보건원이 1977년에 협약을 맺고 공동 연구로 개발한 국가식품 영양분석 프로그램이다. 대형마트에 기초한 표본추출에서는 이마트 가양점, 홈플러스 시흥점, 롯데마트 동두천점, 이마트 수원점, 롯데마트 둔산점, 롯데마트 여수점, 이마트 울산점, 하나로클럽 울산점이 표본으로 추출되었고, 전통시장에 기초한 표본추출에서는 서울시 금천구 독산동우시장과 송파구 풍납시장, 고양시 일산서구 일산시장, 광주광역시 북구 운암시장, 대전광역시 대덕구 법동시장, 부산광역시 영도구 봉래시장과 해운대구 좌동재래시장, 창원시 진해구 중앙시장이 표본으로 추출되었다. Under Article 19, Paragraph 1 of the Food Industry Promotion Act, Rural Development Administration renews the Korean foods composition table every five years. Before the publication of the tenth revision of the Korean foods composition table in 2021, this paper suggests methods for collecting representative samples of 182 highly consumed foods in Korea. Food markets are categorized by their distribution channels, which are supermarkets and local markets. Eight samples are collected from each category by applying the National Food and Nutrient Analysis Program (NFNAP)'s stratified multi-stage sampling. The NFNAP was implemented in 1997 as a collaborative food composition research effort between the National Institute of Health (NIH) and the US Department of Agriculture (USDA) to secure reliable estimates for the nutrient content of food and beverages consumed by the US population. Selected supermarkets for selecting representative food samples are Emart Kayang, Homeplus Siheung, Lottemart Dongducheon, Emart Suwon, Lottemart Dunsan, Lottemart Yeosu, Emart Ulsan, and Hanaroclub Ulsan. Selected local markets also are Doksandongusijang in Geumcheon-gu and Pungnapsijang in Songpa-gu, Seoul, Ilsansijang in Ilsanseo-gu, Goyang, Unamsijang in Buk-gu, Gwangju, Beopdongsijang in Daedeok-gu, Daejeon, Bongnaesijang in Yeongdo-gu and Jwadongjaeraesijang in Haeundae-gu, Busan, and Jungangsijang in Jinhae-gu, Changwon.

소비음을 이용한 경피침주요법이 복부비만에 미치는 영향에 대한 임상연구

이아라 ( A Ra Lee ),조유정 ( Yu Jung Cho ),정원석 ( Won Suk Jung ),양유정 ( Yu Jung Yang ),송미연 ( Mi Yeon Song ) 한방재활의학과학회 2009 한방재활의학과학회지 Vol.19 No.2

Objectives: This study was performed to figure out the effects of herbal mesotherapy on abdominal fat in obese women. Methods: Forty obese women those who were diagnosed abdominal obesity had been recruited during February, 2008. They were randomly assigned experimental or control group under block-randomization. Experimental group were treated with Sobi-eum(Xiaofei-yin) injection during 6 weeks (2 times a week) and placebo group were treated with normal saline injection under same procedures. Anthropometry, body impedance analysis, fat computed tomography, blood test, and questionnaires had been administered before and after the treatment. Results: Four subjects were dropped out (voluntary give up), so 18 in experimental group and 18 in placebo group were evaluated. There were significant changes after treatments in both groups. Although no significant differences have been found in the result of anthropometry, body impedance analysis and fat computed tomography between two groups, in the experimental group, the changes of total fat area had a highly significant relationship with all part of abdominal fat. While the placebo group had highly significant relationships with subcutaneous fat area, superficial and deep subcutaneous fat area but not with visceral fat area. Conclusions: Compaired with saline group, herbal mesotheraphy Sobi-eum(Xiaofei-yin) is effective in reduction of visceral fat after adjusting TFA.

전기방전에 의한 Ti3Al의 합성 및 소결 특성 연구

장형순 ( Hyung Sun Jang ),조유정 ( Yu Jung Cho ),강태주 ( Tae Ju Kang ),김기범 ( Ki Beom Kim ),이원희 ( Won Hee Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.8

Direct syntheses of bulk Ti3Al via electro-discharge-sintering (EDS) of a stoichiometric elemental powder mixture were investigated. A capacitor bank of 450 μF was charged with three input energies, 0.5, 1.0, and 1.5 kJ. The charged capacitor bank was then instantaneously discharged through 0.3 g of a Ti-25.0 at.%Al powder mixture for consolidation. Complete phase transformation occurred in less than 200 μsec by the discharge and a bulk Ti3Al compact was obtained. Compared with consolidated samples fabricated by conventional methods such as high vacuum sintering and casting, the electro-discharge-sintered Ti3Al compact shows a very fine microstructure with a hardness value of 425 Hv. Electro-discharge-sintering under a N2 atmosphere successfully modified the surface Ti oxide of the Ti3Al compact into Ti nitride, which concurred with the synthesis and consolidation of Ti3Al. Complete conversion yielding a single phase Ti3Al is primarily dominated by the fast solid state diffusion reaction.

기계적 합금화에 의해 제조된 Ti5Si3 분말의 전기방전소결 특성 연구

천연욱 ( Yeon Wuk Cheon ),조유정 ( Yu Jung Cho ),강태주 ( Tae Ju Kang ),김정열 ( Jung Yeul Kim ),박준식 ( Jun Sik Park ),변창섭 ( Chang Sup Byun ),이상호 ( Sang Ho Lee ),이원희 ( Won Hee Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.10

The consolidation of mechanical alloyed Ti5Si3 powder by electro-discharge-sintering has been investigated. A single pulse of 2.5 to 8.0 kJ/0.34 g was applied to each powder mixture using 300 and 450 μF capacitors. A bulk-like solid with Ti5Si3 phase has been successfully fabricated by the discharge with an input energy of more than 2.5 kJ in less than 160 μsec. Micro-Vickers hardness was found to be higher than 1350, which is significantly higher than that of a conventional high temperature sintered sample. The formation of Ti5Si3 and consolidation occurred through a fast solid state diffusion reaction.