Fabrication of carbon nanofiber electrodes using poly(acrylonitrile‑co‑vinylimidazole) and their energy storage performance

Kyung‑Hye Jung,So Jeong Kim,Ye Ji Son,John P. Ferraris 한국탄소학회 2019 Carbon Letters Vol.29 No.2

For electrodes in electrochemical double-layer capacitors, carbon nanofibers (CNFs) were prepared by thermal treatment of precursor polymer nanofibers, fabricated by electrospinning. Poly(acrylonitrile-co-vinylimidazole) (PAV) was employed as a precursor polymer of carbon nanofibers due to the effective cyclization of PAV polymer chains during thermal treatment compared to a typical precursor, polyacrylonitrile (PAN). PAV solutions with different comonomer compositions were prepared and electrospun to produce precursor nanofibers. Surface images obtained from scanning electron microscopy showed that their nanofibrous structure was well preserved after carbonization. It was also confirmed that electrospun PAV nanofibers were successfully converted to carbon nanofibers after the carbonization step by Raman spectroscopy. Carbon nanofiber electrodes derived from PAV showed higher specific capacitances and energy/power densities than those from PAN, which was tested by coin-type cells. It was also shown that PAV with an acrylonitrile/vinylimidazole composition of 83:17 is most promising for the carbon nanofiber precursor exhibiting a specific capacitance of 114 F/g. Their energy and power density are 70.1 Wh/kg at 1 A/g and 9.5 W/kg at 6 A/g, respectively. In addition, pouch cells were assembled to load the higher amount of electrode materials in the cells, and a box-like cyclic voltammetry was obtained with high capacitances.

노인의 성격과 죽음태도에 관한 탐색적 연구

유경원,박상하,김혜숙,정경인 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1

Background and Objectives: The purpose of this study was to analyze how the personality of elderly people affects their attitude toward death. Method: For this study, we investigated 86 old men and women with over the age of 60 in C and J nursing home for the old at Gwang ju city during January 5 to March 31, 2003. As a research tool, the total 20 questions of modified Shanans assorted survey method to measure personality style were used and the reliability of this study was Cronbach's α= 0.7507. For determination of attitude of death, the total 36 questions of FODS, which has been used by Suh, Hye-Kyung were used and the reliability of this study was Cronbach's α= 0.60. Using SPSS program, the collected data were analyzed by Frequency, ANOVA and Pearson correlation coefficient, respectively. Results: In the analyze of the results of personality complying with general characteristics, there were statistically significant differences in age. It was shown that the personality of the old with the age of 61-65 is positive. There were no significant differences in thee attitude toward death complying with general characteristics. The hypothesis in this study, the correlation that the more positive personality of the old, the more positive attitude toward death was supported. Conclusion: Since the elderly people with more positive personality may have more positive attitude toward death, it is considered that the old themselves, their family and workers might help to haw positive personality for the positive attitude toward death.

대동맥 협착증과 동반된 출혈성 위장관 동정맥 기형에서 Estrogen-Progesterone 치료 1예

김도연,김화정,김효정,남준식,박수영,박영미,신정은,주미순,황민규,정혜경,손혜영,이선영,이한주 大韓消化器內視鏡學會 1999 Clinical Endoscopy Vol.19 No.부록2

미세 패턴에서 공정 여유도를 고려한 선폭 분석

정연운,조선영,오진경,오혜근 漢陽大學校 工學技術硏究所 1997 工學技術論文集 Vol.6 No.1

The linewidth variation with different process variables, such as exposure dose, thickness of PR, thickness of thin film, and the optical property of thin film, was studied for deep UV light and resist developed 0.25 μm isolated line pattern. We found that the PR thickness which gave minimum linewidth showed larger exposure latitude and smaller linewidth variation compared to the PR thickness which gave maximum linewidth. Thus it will provide better process latitude and smaller linewidth variation if we use this PR thickness.

안경착용자의 안경착용에 대한 이미지 연구 : Q-방법론적 연구 Q-methodological Approach

정수정,정혜경,김경희,권혜진 韓國學校保健學會 1999 韓國學校保健學會誌 Vol.12 No.1

This study attempts to identify the self-image of eyeglass wearers with Q-methodology. Preliminary Q-statements were collected through personal and telephone interviews and based in consultation with reference books, eyeglass wearers, an optician and an oculist. Finally,34 Q-samples were seleted. The results were analyzed by a Q-factor with a PC QUANL Program. The sell-image of eyeglass wearers were found to revolve around three types: Type 1. They feel that eyeglasses have a negative inf1uence on image and that they uncomfortable. In addition, other people have a negative bias toward people who wear eyeglasses. As a result of these negative prejudices and inconveniences, there is a tendency to wear contact lens or have laser operations. Type 2. They feel less uncomfortable comparatively', when explained that classes can help improve their image. When explained as a fashion accessory, negative prejudices almost disappeared. Type 3. They show a positive reaction when explained that spectacles are also rosed for sight protection. However, they are sensitive to changes in their complexion as a result of eyeglass wear and place much importance in the design of glass frames. The significance of this study is to suggest basic data for a mediation device that improve the image of eyeglass wearers discovery and analysis of these three types.

국내의 치매관련 간호연구논문 분석

김혜영,홍춘실,오경옥,이선영,정현숙,이지혜,남미라 충남대학교 간호과학연구소 2002 충남대 간호학술지 Vol.5 No.1

The purpose of this study was to analyze the trends of korean nursing research on dementia and to suggest the direction of future research. A total of 52 nursing research articles published from 1992 to 2001 were selected for this study. These articles were analyzed in a systematic way including time and source of publication, design of research, type of subjects, variable and tool of measurement, intervention outcome of experimental research, and theme of qualitative research. The results were as follows : 1. The nursing research about dementia has appeared since 1992 and increased rapidly since 1998. 2. Eighteen of 52 studies were composed of dissertation of graduate school, and the research designs were mostly quantitative. There were 36 nonexperimental research, 11 experimental research, and 5 qualitative research designs. 3. The subjects of studies were mostly the caregivers of dementia patients as 33 of 52 studies. 4. Most measurement instruments used for research were developed by researcher him/herself, or redesigned and translated into korean as the original foreign version was used. 5. In correlational research, the trend was to study physical conditions in relation to activities of daily living and functional status in dementia patients and psychological conditions in relation to burden, quality of life, depression, and stress in their families. 6. 2 methodological research were development of assessment tool of dementia patients in community, and assessment of burden of caregiver. 7. In experimental research, subjects were all dementia patients, and interventions were music therapy(5), light therapy(2), education program, cognitive stimulation training, validation therapy, hand massage, reminiscence, horticultural therapy, and art therapy. 8. Theme of qualitative research was all caring experience of family. There were 3 phenomenologic methodology, l ethnography and l case study. Based on these findings, the following recommendations were made: 1. It' s necessary to develop a reliable and valid instrument to measure the characteristics of dementia patients and family caregivers of dementia patients. 2. Experimental study should be repeated to prove the effect of intervention for dementia patients and their family.

地衣類의 脂質과 蛋白質 含量

徐信惠,李鴻善,崔璟姬,崔正渼 효성여자대학교 가정대학 학도호국단 1984 家政大論集 Vol.3 No.-

地衣類의 영양학적 가치를 조사하기 위하여 地衣類(지붕, 바위, 나무)와 석이의 總脂質 含量, 脂質 분포, 脂肪酸 조성, 蛋白質 含量을 측정하였다. 그 결과 총지질 함량은 100g당 석이는 3.47g, 바위에 地衣類는 3.40g, 지붕의 地衣類는 3.17g, 나무의 地衣類는 2.73g 이었고 TLC法에 의한 脂質의 분포는 석이와 地衣類 모두 cholesterol ester와 phospholipid 등이 있었고 나무 地衣類에는 TG 및 cholesterol의 흔적을 보였다. 지방산 조성은 대부분 C_12~C_18 fatty acid였고 그 중 C_18 : 1 C_18 : 2인 것이 50% 정도로 높게 나타났다. 나무의 地衣類에는 C_18 이상의 fatty acid도 상당량 분포되어 있었으며 C_20.4 fatty acid는 18.9%였다. 단백질 함량은 석이 6.60g, 地衣類는 8.22g이었다. To investigate the nutritional value of lichens, contents of total lipid, compositions of fatty acids, distributions of lipids and contents of total proteins in lichens (on the rock, roof and tree) and sogi were examined. The results were summarized as follow. The contents of total lipid in sogi, rock, roof, and tree lichens were 3.47±0.05%, 3.40±0.09%, 3.17±0.02%, 2.73±0.04% respectively. Lipids in all them were cholestrol ester and phospholidpid, and TG and cholesterol were existed only the lichen on the tree. Fatty acids were composed of that of carbon number 12-18; C_18:1 and C_18:2 were about 50%, Contents of total protein in sogi and lichen (roof) were 6.60% and 8.22% respectively.

데치는 시간에 따른 침투성 및 비침투성 농약 처리 엽채류의 비타민 및 무기질의 함량 변화

전혜경,안태현,홍정진 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.1

The present study was conducted to investigate effect of blanching time on changes in vitamin and mineral contents in leafy vegetables treated by different pesticides. Vitamin A content of fresh leafy vegetables was high whorled mallow > chard > spinach hi order and vitamin C content of those was high spinach > whorled mallow > chard in order. Vitamin A and C contents of leafy vegetables treated by non-systemic pesticide were higher than those of leafy vegetables treated by systemic pesticide. Changes in vitamin A and C contents of leafy vegetables treated by systemic pesticide and non-systemic pesticide showed a similar trend. Vitamin A content significantly increased, while vitamin C content significantly decreased by conventional blanching. Changes in mineral contents in leafy vegetables treated by systemic pesticide and non-systemic pesticide showed a similar tread. Upon conventional blanching, Mg in spinach, Mg and Ca in chard and whorled mallow slightly increased, while K in all leafy vegetables remarkably decreased, and Se in spinach slightly decreased and Se in other vegetables remarkably decreased. On the other hand, Na, P, Fe, Cu and Zn in all leafy vegetables slightly decreased or did not show any change.

억제대 적용지침 개발을 통한 불필요한 억제대 적용율 감소활동

곽경선,김성은,배은경,이은숙,이은혜,최윤정,이윤경 한국의료QA학회 2009 한국의료질향상학회지 Vol.15 No.2

문제: 억제대 적용에 대한구체적 적용지침 없이 의례적으로 억제대를사용함으로 인해 환자들의 신체적 또는 정신적 안전을 위협할 수 있다. 목적: 완전 진정상태 이거나 근력이 약하여 발관능력이 없는 환자에 대한 예방적 적용, 바빠서 환자를볼수 없 는경우, 간호사본인의 판단이 없이 타인의 요구에 따르는등의 불필요한 억제대 적용이 증가하는 원인을 파악하여 중환자실의 특수성에 맞는 억제대 적용및 제거 지침을 마련하고자 한다. 의료기관: 인천광역시에 소재한 의과대학 소속병원의 집중치료실 개선효과: 억제대 적용에 대한중환자실 간호사에게 미치는 영향을 보면 태도 정도 p=0.09(p<0.1), 올바른 수행 능력은 p= 0.005 (p <0.0히로통계적으로유의한것으로 나타났다. 지식 정도 p=0.172(p<0.05) 통계적으로 유의 하지는 않지만 모든항목이 개선 활동전 에 비해 2,3차 개선 활동후에 향상한 것으로 나타났다. 개선활동전에 8.1%였던 간호 기록, 0.7%였던 간호중재, 0%였던 의사처방율이 3차 개선 활동 후 3가지 모두 100% 달성되었다. 이는 억제대 적용율 갑소 및 부적절한 억제대 적용율은 유의하게 감소하였다. 교훈: 중환자실 간호사의 억제대 적용에 대한태도, 지식, 올바른 간호 수행 능력은 지속적으로 재평가 되어지고, 교육내용은좀더 나은 간호제공을 위하여 개발 되어져야 할 것이다. 억제대 적용 기준과 제거 기준을 Check List 하여 객관성의 유지를 위한 개선 활동은계속적으로 Feedback 되어야 할 것이다.

CT flouroscopy를 이용한 중재적 시술의 유용성

전혜정,박정희,서보경,박상우,신현준,최영철,한혜승,이창희 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-

Conventional CT-guided needle localization has been reported many times, but a few reports of interventional procedures by using multidetector CT scan with CT-fluoroscopy have been described. We presented 36 cases of CT-fluoroscopy guided interventional procedures focusing on the puncture technique. Two cases of small pneumothorax and one case of pulmonary hemorrhage out of 2lcases after lung biopsy, were not needed any treatments We can easily and accurately access to the lesion by using CT-fluoroscopy and unique our marker system.