Quaternary Pt2Ru1Fe1M1/C (M=Ni, Mo, or W) catalysts for methanol electro-oxidation reaction

Jeon, M. K.,Lee, K. R.,Jeon, H. J.,McGinn, P. J.,Kang, K. H.,Park, G. I. KOREAN INSTITUTE OF CHEMICAL ENGINEER 2015 Korean Journal of Chemical Engineering Vol.32 No.2

남녀공학과 여대에 재학 중인 여자대학생의 체형만족도와 자아존중감의 관계

김민정,김보민,김소연,김형주,서민경,박수영,전승연,한누리,함승순 이화여자대학교 간호과학대학 2011 이화간호학회지 Vol.- No.45

Purpose: This study was done to investigate the relationship between satisfaction of body figure and self-esteem of female university students according to the school types. Method: The study sample consisted of 360 female university students who had been attending at co-educational university or women's university in Korea. Data were collected by questionnaires from July 27th to August 6th in 2010. All statistical analyses were conducted using t-test, chi-square test, Fisher's exact test, ANOVA, Kruskal Wallis test, and Pearson’s Correlation Coefficient procedures with SPSS 18.0 program. The level of significance was set at .05. Results: The general characteristics, satisfaction of body figure and self-esteem were not significantly different between co-educational university and women’s university. Although 93.1 percent of female students were under or normal weight according to their BMI, 88.0 percent of female university students were not satisfied with their current body figure and 90.5 percent among them wanted to lose weight. The satisfaction of body figure was related with self-esteem (coed: r=-0.228, p=.002, women's: r= -0.264, p<.001) but there was no difference from school types. Conclusion: The result implied the importance of appropriate education and nursing intervention which would improve satisfaction of body of female university students.

Detection of M31 Binaries via High-Cadence Pixel-Lensing Surveys

D. Kim,S.-J. Chung,M. J. Darnley,J. P. Duke,A. Gould,C. Han,M. A. Ibrahimov,M. Im,Y.-B. Jeon,R. G. Karimov,E. Kerins,C.-U. Lee,A. Newsam,B.-G. Park 한국천문학회 2007 天文學會報 Vol.32 No.1

Design of the ITER VUV edge imaging spectrometer and R&D for the rotary motional vacuum feed-through

Seon, C.R.,Jeon, J.S.,Cheon, M.S.,Pak, S.,Lee, H.G.,Bernascolle, P.,Barnsley, R. North-Holland ; Elsevier Science Ltd 2016 Fusion engineering and design Vol.109 No.1

The ITER vacuum ultraviolet (VUV) spectrometer is aimed at monitoring impurity ion species in plasmas, and it consists of three systems, core survey, edge imaging, and divertor spectrometers depending on positions. In the VUV edge imaging spectrometer, a field mirror and a collimation mirror are used for imaging of the light onto the entrance slit of the VUV imaging spectrometer. To optimize the design of the field mirror box in the ITER port plug, the mirror box mock-up was developed to test installation and alignment. Especially, the mirror alignment using a special tilt stage was tested, and the motional feed-through with a double bellows was developed for the shutter operation. The preliminary qualification test for this rotary motional vacuum feed-through was performed to meet the functional requirement of ITER mechanical feed-through. Leak-tightness for over 15,000 times (larger than operation times) of 360 rotation and backward motion was tested for 1N.m loading condition to the axis rod of the feed-through. In the test, the vacuum inside of the feed-through was monitored, and the feed-through showed good rotation function and leak-tightness during test.

HVPE 방법에 의해 r-plane 사파이어 기판 위의 선택 성장된 GaN/AlGaN 이종 접합구조의 특성

홍상현,전헌수,한영훈,김은주,이아름,김경화,황선령,하홍주,안형수,양민,Hong, S.H.,Jeon, H.S.,Han, Y.H.,Kim, E.J.,Lee, A.R.,Kim, K.H.,Hwang, S.L.,Ha, H.,Ahn, H.S.,Yang, M. 한국결정성장학회 2009 한국결정성장학회지 Vol.19 No.1

본 논문에서는 혼합소스(mixed-source) HVPE(hydride vapor phase epitaxy)방법으로 선택성장(SAC: selective area growth) GaN/AlGaN 이종접합구조의 발광다이오드를 r-plane 사파이어 기판 위에 제작하였다. SAG-GaN/AlGaN DH(double heterostructure)는 고온 GaN 버퍼층, Te 도핑된 AlGaN n-클래딩층. Gan 활성층. Mg 도핑된 AlGaN p-클래딩층. Mg 도핑된 GaN p-캡층으로 구성되어있다. GaN/AlGaN 이종접합구조의 발광다이오드의 특성을 알아보기 위해 SEM을 통한 구조적 분석과 전류-전압 측정(I-V: current-voltage measurement), 전류-광출력(EL: electroluminescence) 측정을 통하여 전기적, 광학적 특성을 평가하였다. In this paper, a selective area growth (SAG) of a GaN/AlGaN double heterostructure (DH) has been performed on r-plane sapphire substrate by using the mixed-source hydride vapor phase epitaxy (HVPE) with multi-sliding boat system. The SAG-GaN/AlGaN DH consists of GaN buffer layer, Te-doped AlGaN n-cladding layer, GaN active layer, Mg-doped AlGaN p-cladding layer, and Mg-doped GaN p-capping layer. The electroluminescence (EL) characteristics show an emission peak of wavelength, 439 nm with a full width at half maximum (FWHM) of approximately 0.64 eV at 20 mA. The I-V measurements show that the turn-on voltage of the SAG-GaN/AlGaN DH is 3.4 V at room temperature. We found that the mixed-source HVPE method with a multi-sliding boat system was one of promising growth methods for III-Nitride LEDs.

Quorum sensing activity of the plant growth-promoting rhizobacterium Serratia glossinae GS2 isolated from the sesame (Sesamum indicum L.) rhizosphere

Jung, B. K.,Khan, A. R.,Hong, S. J.,Park, G. S.,Park, Y. J.,Kim, H. J.,Jeon, H. J.,Khan, M. A.,Waqas, M.,Lee, I. J. UNIV. OF MILAN DEPARTMENT OF FOOD SCIENCE AND MICR 2017 ANNALS OF MICROBIOLOGY Vol.67 No.9

<P>Plant growth-promoting rhizobacteria (PGPR) affect plant growth through various mechanisms, such as indole-3-acetic acid (IAA) production, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, and biofilm formation. The aim of the study reported here was to isolate and characterize rhizobacteria that produce quorum-sensing signal molecules and other PGPR-related molecules. A biofilm-forming bacterium, GS2, was isolated from the rhizosphere of a sesame plant and subsequently found to produce two quorum-sensing signal molecules that were identified as N-hexanoyl-L-homoserine lactone (m/z 200) and N-octanoyl-L-homoserine lactone (m/z 228) by liquid chromatography-tandem mass spectrometry analysis. The strain was also found to produce IAA (17.2 mu g mL(-1)), gibberellins (113.7 mu g mL(-1)), and ACC deaminase (9.7 mu M alpha-ketobutyrate mg(-1) protein h(-1)). The strain was identified as Serratia glossinae based on a comparison of 16S rRNA gene sequences. Inoculation of the strain promoted growth of a gibberellin-deficient rice dwarf mutant (Waito-C). Different growth attributes, including shoot and root elongation, chlorophyll content, and plant weight could be attributed to the PGPR characteristics of strain GS2. These results suggest that S. glossinae strain GS2 can serve as a microbial agent that improves plant growth.</P>

HFO-1234yf를 적용한 가정용 냉동/냉장고의 성능평가

이장석(J.S. Lee),한준수(J.S. Han),이명렬(M.R. Lee),전시문(S.M. Jeon) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11

The performance of HFO-1234yf as a substitute for R-134a was evaluated in a household freezer/refrigerator. A series of 'Refrigerant charging test', 'Pulldown test', 'Cooling speed test' and 'energy consumption test' were carried out under AHAM(Association of Home Appliance Manufacturers) standard. The results of drop-in test were compared with those of R-134a. Test was also conducted at severe ambient air condition (43℃). The result shows that HFO1234yf is as good as R-134a in a cycle performance but the diameter of capillary tube should be changed to larger one for cooling speed.

중년남성의 지각된 건강상태, 가족응집력 및 건강증진행위에 관한 연구

김지선,노원영,박새별,유동민,이가은,이주애,전유라,조세영,차지영,고지현 이화여자대학교 간호과학대학 2016 이화간호학회지 Vol.- No.50

health promotion behavior of middle aged men and the relationship among the above factors. Methods: Subjects of the research were 325 middle aged men in Korea. The questionnaires were composed of general characteristics, Health Self Rating Scale, FACES-Ⅲ : Family Adaptability & Cohesion Evaluation Scale Ⅲ, Health Promoting Lifestyle Profile. Data were statistically analyzed by t-test, ANOVA, Scheffe test and Pearson’s correlation. Results: Middle aged men whose perceived economic status are low show lower perceived health status than moderate and high (F=3.364, p=.010). Health promotion behavior in the age 40-44 shows lower level than 60-64 (F=2.984, p=.019). Middle aged men who have Economically dependent adult in the first child show higher level in health promotion behavior than who have Middle & High school student in the first child (F=2.468, p=.045). In the middle aged men, perceived health status and family cohesion show positive correlation (r=.341, p<.01). Perceived health status and health promotion behavior show positive correlation (r=.500, p<.01). Family cohesion and health promotion behavior show posotive correlation (r=.564, p<.01). Conclusions: We analyzed influencing factor and a relationship between perceived health status, family cohesion and health promotion behavior. Accordingly, we can think of applying nursing interventions to the middle aged men considering the general characteristics. Also we can think of applying nursing interventions and educations to help them evaluate their perceived health status and include the support of family members for the health promotion behavior.

지연임신에서 제대동맥 및 뇌동맥 Doppler 연구

전명권,조용균,최훈,김복린,이홍균 인제대학교 1993 仁濟醫學 Vol.14 No.4

지연임신의 산전 태아 감시 방법으로 비수축성 검사(NST) 및 양수지수(AFI)와 같이 태아 제대동맥과 뇌 동맥의 Doppler velocimetry의 유용성을 검토하였다. To assess alterations in vascular resistance as measured by Doppler ultrasound in the postterm fetus, 40 postterm (>287 days gestation) patients were studied. Velocity recordings were obtained from the internal carotid artery and umbilical artery to calculate the systolic to diastolic(S/D) ratio. Patients were divided into two groups. Group 1 consisted of 29 patients with normal antepartum fetal surveillance that included reactive nonstress test and amniotic fluid index(using the four-quardrant technique) equal to or greater than 5cm. Group 2 consisted of 11 patients with antepartum compromise on the antepartum fetal surveillance tests. There was significantly greater(p<.05) morbidity in group 2 compared to group 1, but no siginificant differences in the umbilical S/D ratio in the two groups. However, in group 2, 5(45.5%) patients had abnormally low cerebral S/D ratios(<3.5) and 6(54.5%) patients had abnormally low cerebral placental resistance ratios(<1), compared to only 1(3.5%) and 2(6.9%) for those respective ratios in group 1(p<.05). In the uncompromised postterm fetus, cerebral vascular resistance exceeds 3.5 and cerebral placental resistance ratio exceed 1 ; and lowering of cerebral vascular resistance(S/D ratio<3.5) and cerebral placental resistance ratio(<1) are associated with antepartum compromise and adverse pregnancy outcome in the postterm fetus and may be a compensatory brawn-sparing ettect in response to fetal stress.

산전 태아 사망의 원인 분석 평가

전명권,김복린,이홍균 인제대학교 1991 仁濟醫學 Vol.12 No.4

산전 태아 사망 원인을 첫째 불분명한 원인, 둘째 불가피한 원인, 셋째 가급적 피할 수 있는 원인 등으로 구분하여 그 중에서 가급적 피할 수 있는 원인을 분석하여 앞으로 산전 태아 사망을 감소시켜 보고자 한다. In order to reduce the prenatal death, we reviewed the causes of late abortions and stillbirths. For each cause an assessment of potential avoidability was made using the following definition : If any factor was identified that might have altered the outcome, the case was judged potentially avoidable. All other mortality was classified as either unavoidable or undetermined (if sufficient data were not avililable). We experienced 91 cases of prenatal deaths and the common causes were as follows in order: Unexplained IUFD, Idiopathic preterm delivery, IUGR, congenital malformation, preeclampsia, cord complication, and abruptio placenta. In 31.9% of prenatal deaths, at least one potentially avoidable factor could be identified that might have altered the outcome, while 69.4% was unavoidable and 6.6% undetermined. The causes of the potentially avoidable deaths(31 cases) were the incorrect viability assessment/management plan, 4(12.9%); asphyxia, 13(41.9%); IUGR, 9(29%); syphilis, 3(9.7%); and hypovolemic shock, 2(6.5%). We hope that a better obstetrical care program will be provided with the suggestion of the patterns of potentially avoidable prenatal death.