Insulation Coating of Fe–Si–Cr Soft Magnetic Powder by Selective Oxidation

Jae‑Young Park,Kwangsuk Park,Bosung Seo,Julien O. Fadonougbo,Tae‑Wook Na,Ki Beom Park,Hyeon‑Tae Im,Nong‑Moon Hwang,Hyung‑Ki Park 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

This study examines the insulation coating technology of Fe–Si–Cr powder via selective oxidation annealing, which oxidizeselements selectively by controlling the oxidation potential. The study calculated the oxidation driving force of Fe, Si, andCr, and conducted a thermodynamic analysis of oxidation and reduction conditions according to temperature and oxidationpotential. Based on the results, a selective oxidation annealing was performed in an atmosphere in which Fe is reduced andonly Si and Cr are selectively oxidized. The oxidation potential was controlled through the partial pressure ratio of hydrogenand water vapor. The XPS analysis results confirmed that a Si and Cr complex oxide layer formed on the powder surfaceafter the selective oxidation annealing. Afterward, withstanding voltages were analyzed to evaluate the insulation property. Then, the withstanding voltage of the powder applying the selective oxidation annealing increased significantly comparedto that of the initial powder. Further analysis showed that the powder annealed in an air atmosphere had a significantly lowersaturation magnetic flux density than the initial powder, while the powder applying the selective oxidation annealing hadonly a slightly reduced saturation magnetic flux density.

고령자 급성 췌장염의 임상적 고찰

백용한,서정훈,송건훈,이진헌,송시영,정재복,강진경,박인서,이수진 大韓消化器病學會 1998 大韓消化器病學會誌 Vol.32 No.3

기억력 저하를 호소하는 노인들을 대상으로 INM176를 3개월간 임상시험한 후의 치료성적 및 부작용 평가 보고

김지혜,고선규,고효정,권영아,김성환,김재경,김태은,박재우,서민영,송영란,이인수,김도관 大韓神經精神醫學會 2003 신경정신의학 Vol.42 No.2

Objectives : We examined the effects of INM 176 (K-l107) compared with placebo on the cognitive functions of 92 old aged subjects with cognitive impairment. Methods : This was a prospective, 12 week, double-blind, Placebo-controlled clinical trial. The elderly who achieved a score of less than 25 points on the K-MMSE or showed a high risk of Alzheimer's disease from the 7-Minute Neurocognitive Screening Battery were considered to have objective impairment and were selected as subjects for this study. The subjects were randomized to placebo or INM 176 group. The outcome measures were from the Alzheimer's Disease Assessment Scale-cognitive subscale (ADAS-Cog), the Instrumental Activities ofDaily Living (IADL) and the Korean Geriatric Depression Scale (KGDS) and two kinds of computerized priming tests. After setting the total error score in the Alzheimer's Disease Assessment Scale-Cognitive section (ADAS-cog) as the repeated measurement factor, an analysis of variance of the combined factor design was done between the placebo and INM 176 group. Results : The interaction effect of time (pre- and post-trial) and group (placebo and INM 176 group) was significant in the analysis of the ADAS-cog's total error score. The INM 176 group's total error score in the ADAS-cog decreased significantly (p<0.01), whereas the placebo group showed a slight increase. The mean changes in IADL and GDS from baseline scores favored in the INM 176 group than in the placebo group. Outcome changes ofADAS-cog, IADL, KGDS scores during the 12 week clinical trail ofINM 176 and placebo demonstrated favorable responses in the INM176 administered group. Conclusions : This is a preliminary clinical trial result of INM176 as a memory pill. Based on these results, INM176 may be a candidate molecule for the improvement of cognitive functions, including memory, Further clinical trial should demonstrate its efficacy.

Nanogenerators: Fully Rollable Transparent Nanogenerators Based on Graphene Electrodes (Adv. Mater. 19/2010)

Choi, Dukhyun,Choi, Min-Yeol,Choi, Won Mook,Shin, Hyeon-Jin,Park, Hyun-Kyu,Seo, Ju-Seok,Park, Jongbong,Yoon, Seon-Mi,Chae, Seung Jin,Lee, Young Hee,Kim, Sang-Woo,Choi, Jae-Young,Lee, Sang Yoon,Kim, Jo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.19

<B>Graphic Abstract</B> <P>The cover shows an image of fully rollable transparent nanogenerators synthesized using chemical vapor deposition grown large-scale graphene sheets as transparent electrodes and piezoelectric ZnO nanorod arrays. Sang-Woo Kim, Jae-Young Choi, and co-workers report on p. 2187 the electrical and structural stability of the nanogenerators, with excellent charge scavenging performance under external mechanical loads such as bending and rolling. This study shows that graphene-based nanogenerators are very promising for self-powered rollable transparent device applications. <img src='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content.gif' alt='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content'> </P>

제통단이 퇴행성 슬관절염 환자의 삶의 질에 미치는 영향

서병관,류성룡,강중원,우현수,이상훈,이재동,최도영,김건식,이두익,이윤호 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objectives : to evaluate the effects of Jetongdan, the newly developed herbal medicine, on the quality of life in patients with osteoarthritis of knee Methods : Placebo-controlled, randomized clinical trial on the 80 patients with osteoarthritis of the knee was fulfilled. After enrollment, they took medication as they enrolled. And they were asked to answer the questionnaires (Korean Health Assessment Questionnaire (KHAQ), Lequesne's functional index (LF1), visual analogue scale (VAS)) and analysed with the erythrocyte sedimentation rate (ESR) at baseline, after 4 weeks and 8 weeks of medication. Results : Total KHAQ score, some categories of KHAQ like hygiene, activities were significantly improved after 8 weeks of medication. And the change of the KHAQ score was significantly correlated with the change of VAS. But LFI, VAS, ESR level was not significantly improved, and it was considered because of the short medication period and small size of study population. Conclusion : In conclusion, Jetongdan could improve the health-related quality of life in patients with osteoarthritis of knee. Further study in the large population, in long period were recommended.

혈관신경성부종의 문헌적 고찰 및 증례 보고

서보영,임재석,김 온,김성문 大韓顎顔面成形外科學會 1989 Maxillofacial Plastic Reconstructive Surgery Vol.11 No.1

Angioneurotic edema is rarely seen in dental practice and manifested by acute attacks of swelling of the extremities, face, airway, or abdominal visera, occuring spontaneously and suddenly or secondary to trauma. Two types are recognized : hereditary and nonhereditary. Prophylatic therapy may be used by fresh frozen plasma or antifibrinolytic agents in hereditary type. Good supportive care for acute attacks, together with a knowledge of course of the disease, can prevent asphyxiation from airway obstruction. A case of acute angioneurotic edema of the facial area in a 19-year-old man is presented in conjunction with a review of the literature. Angioneurotic edema attacks him acutely after the extraction of the lower, right 3rd molar.

환경공무원을 위한 환경교육 사이버 연수 콘텐츠 요구 분석

서우석,정철영,이재호 한국농업교육학회 2007 농업교육과 인적자원개발 Vol.39 No.4

이 연구는 환경공무원을 대상으로 하는 환경교육 사이버 연수 콘텐츠에 대한 요구분석으로서 환경공무원을 위한 환경교육 연수 실태에 대한 기초 분석을 바탕으로 환경공무원 환경교육 사이버 연수 콘텐츠 개발을 위한 요구분석을 실시하여,환경공무원을 위한 환경교육 사이버 연수 콘텐츠 개발의 기본 방향을 강구하고자 하였다. 첫째,환경공무원을 위한 환경교육 연수 실태를 분석한 결과,이론 중심의 강의 형태를 벗어나지 못하고 있었고,현재의 공무원 환경교육은 단편적인 기능위주로 이루어지고 있었으며,교육이 환경업무 를 담당하고 있는 공무원에 치중되어 있었고,연수를 위한 시간이 부족하였다. 이를 해결하기 위해 사 이버 연수형태의 요구가 있음을 파악하였다. 둘째,사이버 연수 콘텐츠 개발에 대한 요구분석 결과,모든 연수내용에 대하여 교육적 요구가 높았고,일부 연수과정에 대하여 사이버형태의 연수가 요구되었으며,일부 연수내용에 대하여 사이버 연수 형태의 연수과정이 요구되어지나,연수내용에 따라 Blended Learning 형태 요구가 나타났다. 이 외에도 신임환경공무원을 위한 환경소양강좌 신설이 요구되었고,자연과학 및 환경공학 이외의 인문사회학적 내용이 요구되고 있었으며,환경소양 내용에 대한 요구조사 결과 또한 인문사회학적 내용에 대한 요구가 높게 나타났다. The purpose of the study was to Needs Analysis of Environmental Education Cyber In-service Contents for Environmental Public Servants, through reviewing literature, analyzing domestic and environmental education inservice e-learning contents in other countries, and expert conferences. Major research finding were aw following: First, there is a lack of time for participation in education courses for environmental public Servants and environmental training courses. Therefore, cyber training can be a good solution to the problems with environmental training courses, It improves access to education opportunities as it overcomes the limitations of time and space and provides hands-on experience through multimedia materials that reflect the real world. Second, directions for developing cyber environmental education contents were represented to three part; 1) strategies for developing cyber environmental education contents, 2) Models for developing cyber environmental education contents, 3) Contents selection for developing cyber environmental education contents.

급성 운동 신경 축삭성 신경병증과 동반된 기관지내 이물 1예

조영신,전웅,이호성,최재성,나주옥,서기현,김용훈 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.1

..

30-60대 건강한 서울시민의 脚筋伸展파워 및 신체작업능력 : 동경 및 북경시민과의 비교 Comparison of Tokyo and Peking Residents

서재균,김승일,최영렬,방영진,김형돈,전병관,선우섭,손두옥 한국학교체육학회 1999 한국학교 체육학회지 Vol.9 No.1

본 연구는 한국인의 삶의 질 향상을 위한 국민 생활체육 진흥정책 수립에 필요한 기초자료를 제공하기 위하여, 건강한 30-60대 서울시민(313명)의 체격과 근력, 전신지구력 등의 체력을 측정하여 문화, 경제생활수준이 서로 빠른 동경시민(509명) 및 북경시민(160명)과 비교 검토하는 것을 목적으로 하였다. 각국의 연구대상에 대한 측정은 사전에 협의한 동일한 방법(동경대학 체육과학실법)과 기기를 이용하였다. 체격요인으로는 신장과 체중을, 체력요인으로는 트레드밀 보행시 (90m/분)의 심박수와 보폭 그리고 자전거 에르고미터 운동시의 PWC75%HRmax와 脚筋伸展파워를 측정하였다. 신장 및 체중, 신체질량지수는 남녀 모두 북경, 서울, 동경시민순으로 높게 나타났다. 트레이드밀 보행시의 심박수는 남녀 모두 북경, 동경, 서울시민 순으로 낮은 값을 보였으며, 신장에 대한 보폭비율은 남자의 경우에는 북경, 서울, 동경의 순으로, 여자는 북경, 동경, 서울의 순으로 높았다. 脚筋伸展파워는 60대 여자를 제외한 남녀 모두 북경, 서울, 동경시민의 순으로 높았으며, PWC75%Hrmax는 남자 40대 와 여자 30대를 제외한 모든 연령 대에서 서울시민이 동경시민 보다 높은 경향을 나타냈다. 한편 모든 피검자를 대상으로 연령과 脚筋伸展파워와의 회귀식은 남녀 각각 Y=-0.30X+28.88(n=230, r=0.61, p<.001), Y=-0.l0X +12.49(n=611, r=0.32, p<.001), PWC75%HRmax와의 회귀식은 남녀 각각 Y=-0.01+ 2.50(n=116, r=0.29, p<.01), Y=-0.l0X+1.89(n=461, r=0.20, p<.001)이였다. 따라서 30~60대 서울시민의 체격 및 脚筋伸展파워는 북경시민 보다 낮게 나타나 삶의 질 향상을 위해 보다 적극적인 사회체육 활성화 방안 마련이 요망된다. The purpose of this study was to serve as a basis for making a health promotion policy for better quality of Korean life, by examining 313 citizens of Seoul's physical and leg extension power, physical working capacity who were in their thirties to sixties, enjoying good health, and by making a comparison of tile result with that of 509 citizens of Tokyo and 160 citizens of Peking who lived in different culture and living environment. The findings of this study were as below: First, the male citizens of Peking, who were in their forties to sixties, and the female citizens of the same city, who were in their fifties to sixties, were significantly higher in height, body weight and body mass index. Second, the male citizens of Peking, who were in their thirties and sixties, and the female citizens of the same city, who were in their thirties to forties, were significantly lower in heart rate in walking in the treadmill(90n/min). And there was a tendency that the citizens of Peking showed a higher ratio of stride to height. Third, the male citizens of Peking, who were in their fifties, and the female citizens of the same city, who were in their thirties to forties, had a significantly better leg extension power. As a result of examining all the subjects, there was a negative correlation between leg extension power and age. Fourth, all age groups of Seoul citizens, except males in their forties and females in their thirties, fended to be better in PWC75%HRmax than the citizens of Tokyo. When all the subjects were examined, there was a negative correlation between PWC75%HRmax and age. Consequently, there was a need to prepare more active plan to step up sports fur all successfully in order to improve the quality of life, as the citizens of Seoul who were their thirties to sixties appeared to be inferior in physical physique and leg extension power to the citizens of Peking.

악성종양과 감별이 어려웠던 악안면 영역의 감염질환에 대한 치험례

서재훈,김영균,여환호 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.3

It is very difficult to differentiate the malignant tumor from the maxillofacial infections that have unclear cause, severe indurated swelling, pain and nonresponsiveness to antibioitic treatment and incision and drainage. Incisional biopsy, CT, and MRI examination may not distinguish between infection and a malignant tumors. And then, the clinicians can make a mistake that they perform a unnecessary radical surgery because of inaccurate diagnosis. We present three case reports of maxillofacial infectious disease with diagnosis process, treatment and differential diagnosis. The infectious disease were not resolved with antibiotic and surgical drainage. The progression of clinical sign and radiographic, indings of these disease were masqueraded as malignant tumors.