중·고등학교 여학생의 월경 전후기 불편감에 따른 월경태도 및 성 역할 고정관념의 관계

강슬기,김효민,박서희,백채영,심자영,우한빛,이빛나,이채은,홍지수 이화여자대학교 간호과학대학 2014 이화간호학회지 Vol.- No.48

Purpose: The purpose of this study was to provide the basis for program helping adolescent girls to form correct attitude toward menstruation and gender role stereotype by identifying the relationship among menstrual distress, attitudes toward menstruation and gender role stereotype. Method: The 392 participants of this study were selected among students of 5 middle schools and 3 high schools located in Seoul and Gyeong-gi province. Data were collected from 16 September to 23 September, 2013. The students were asked to answer the questionnaires consisting of MDQ(Menstrual Distress Questionnaire), KGES-A(Korean Gender Egalitarianism Scales for Adolescents), and menstrual attitude measurement scale developed by Min in 2003. Descriptive statistics, independent t-test and One way ANOVA were used to analyze the data with SPSS 21.0. Results: The results of this study were as follows: 1. High school students were more vulnerable to pre and post menstrual discomfort and tend to accept menstruation statically than middle school students(p=.009). 2. Students who did not receive regular sexuality education had private attitudes toward menstruation(p=.002), were emotionally more sensitive(p=.002) than the other group. 3. Students, who had higher menstrual discomfort, were more emotionally sensitive toward menstruation(p<.001), had variety of menstrual symptoms(p<.001), actively managing menstrual symptoms(p<.001), and accepted menstruation statically(p=.002) than the lower group. 4. There was no statistically significant relationship between gender role stereotype and pre and post menstrual discomfort. Conclusion: It was suggested that effective education program should be developed and implemented periodically in order to help adolescent school girls to understand pre and post menstrual discomfort and manage menstrual symptoms by themselves. Also, professional and systematic studies should follow up with larger population and more specific general characteristics.

Challenges of tracking extratropical cyclones in regional climate models

Cô,té,, Hé,lè,ne,Grise, Kevin M.,Son, Seok-Woo,de Elí,a, Ramó,n,Frigon, Anne Springer-Verlag 2015 Climate dynamics Vol.44 No.11

발사체 공력해석 프로그램 RocketAeroMaster2005 개발

김재수,김종록,우철훈,김태훈,임오택,박정주,오범석,옥호남 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.1

예비설계 단계에서 외형설계, 구조설계를 위한 하중분포 계산, 발사체의 안정성 및 성능분석을 위하여 데이터베이스형 발사체 공력코드를 개발하였다. 분석방법으로는 동체, 스트랩온 부스터의 공력계수와 동체와 스트랩온 부스터의 간섭 동의 분석을 거쳐 전체 발사체에 대한 분석이 이루어졌다. 발사체 공력코드의 데이터베이스구성은 기존의 DATCOM의 데이터베이스를 기반으로 발사체 형상에 대한 실험데이터(MD)를 추가 구성함으로서 발사체 공력코드의 신뢰성을 증대시켰다. 또한, 기존의 발사체 공력설계코드와 비교 분석을 수행하여 발사체 공력코드를 검증하였다. For the development of launch vehicle, the aerodynamic characteristics have to be performed for the configuration design in the preliminary design, the load distribution in the detail design, and the performance analysis. The static and dynamic coefficients are analyzed for strap on booster, body and strap on booster-body interface characteristics. A detail analysis is required during the detail design phase, but a rapid analysis is better in the preliminary design. Therefore, the database code, based on the theory and experimental datum, is useful to analyze the variety of models during the preliminary design phase, and the computational aerodynamic code is required to calculate the detail load distribution during the detail design phase. In this computational aerodynamic code, based on the database of theoretical and experimental datum, have been developed.

우주발사체 예비설계 단계의 공력설계 연구

김재수,박남은,김종록,김양수,우철훈,박정주,오범석,옥호남 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.1

예비설계 단계에서 외형설계,구조설계를 위한 하중분포 계산,발사체의 안정성 및 성능분석을 위하여 데이터베이스형 발사체 공력코드를 개발하였다. 분석방법으로는 동체, 핀의 공력계수와 동체와 핀의 간섭, 핀과 핀사이의 간섭 등의 분석을 거쳐 전체 발사체에 대한 분석이 이루어졌다. 발사체 공력코드의 데이터베이스구성은 기존의 DATCOM의 데이터베이스를 기반으로 발사체 형상에 대한 실험데이터를 추가 구성함으로서 발사체 공력코드의 신뢰성을 증대시켰다. 또한, 기존의 발사체 공력셜계코드와 비교 분석을 수행하여 발사체 공력코드를 검증하였다. For the development of launch vehicle, the aerodynamic characteristics have to be performed for the configuration design in the preliminary design, the load distribution in the detail design, and the performance analysis. The static and dynamic coefficients are analyzed for fins, body and fin-body interface characteristics. A detail analysis is required during the detail design phase, but a rapid analysis is better in the preliminary design. Therefore, the database code, based on the theory and experimental datum, is useful to analyze the variety of models during the preliminary design phase, and the computational aerodynamic code is required to calculate the detail load distribution during the detail design phase. In this computational aerodynamic code, based on the database of theoretical and experimental datum, have been developed.

Type 316L 강의 고온 크리프 및 크리프 균열성장 거동

김우곤(Woo-Gon Kim),I.N.C. Kusuma,박재영(Jae-Young Park),이형연(Hyeong-Yeon Lee),김선진(Seon-Jin Kim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12

The high-temperature material behaviors of type 316L stainless steel (SS), which is used for a main structural material of a sodium-cooled fast reactor (SFR), were investigated by the tension, creep, and creep crack growth tests. The tension tests were performed at R.T. to 650℃, the creep tests were performed under different applied loads at 600℃ and 550℃, and the creep crack growth (CCG) tests were conducted using 1/2-inch compact tension specimens at 600℃. The creep test data were analyzed using various creep plots and fracture microstructures, and compared with RCC-MRx. The CCG rate (CCGR) for type 316L was constructed using a C* fracture parameter, and the CCGR of type 316L was compared with those of type 316 SS and 316LN. The creep strength decreased with an increase in rupture time, and the creep rate increased with an increase in stress. The rupture ductility decreased slightly with an increase in rupture time. The present tested data showed higher creep strength than that of RCC-MRx, and marginal differences to RCC-MRx in the creep rate. In the CCGR test results, type 316L was lower in the CCGR than type 316SS, and type 316L and 316LN were almost similar in the CCGR.

Hydrochemical variations in selected geothermal groundwater and carbonated springs in Korea: a baseline study for early detection of CO2 leakage

Choi, H.,Piao, J.,Woo, N. C.,Cho, H. Springer Science + Business Media 2017 Environmental geochemistry and health Vol.39 No.1

<P>A baseline hydrochemistry of the above zone aquifer was examined for the potential of CO2 early detection monitoring. Among the major ionic components and stable isotope ratios of oxygen, hydrogen, and carbon, components with a relative standard deviation (RSD) of <10 % for the seasonal variation were selected as relatively stable. These components were tested for sensitivity to the introduction of 0.1 mol/L CO2 (g) using the PHREEQC simulation results. If the relatively stable components were sensitive to the introduction of CO2, then they could be used as indicators of CO2 leakage into the above zone. As an analog to the zone above CO2 storage formation, we sampled deep groundwater, including geothermal groundwater from well depths of 400-700 m below the ground surface (bgs) and carbonated springs with a high CO2 content in Korea. Under the natural conditions of inland geothermal groundwater, pH, electrical conductivity (EC), bicarbonate (HCO3), delta O-18, delta H-2, and delta C-13 were relatively stable as well as sensitive to the introduction of CO2 (g), thus showing good potential as monitoring parameters for early detection of CO2 leakage. In carbonated springs, the parameters identified were pH, delta O-18, and delta H-2. Baseline hydrochemistry monitoring could provide information on parameters useful for detecting anomalies caused by CO2 leakage as measures for early warning.</P>

SPECT 를 이용한 간용적의 측정

유형식,이종태,박창윤,우광방,백남칠,신동호,주기환 대한핵의학회 1983 핵의학 분자영상 Vol.17 No.1

In 16 volunteers without clinical or laboratory evidence of liver disease, liver volume was determined using single-photon emission computed tomography(ECT). This technique provided excellent abject contrast between the liver and its surroundings and permitted calculation of liver volume without geometric assumptions about the liver's configuration. Reproducibility of results was satisfactory, with a root-mean-square error of less than 2% between duplicate measurements in 16 individuals. The volume measurements were validated by the use of phantoms.

해양플랜트용 고압/고차압 제어밸브의 트림 개발

김준섭(J.S. Kim),김규철(K.C. Kim),김기혁(G.H. Kim),장성철(S.C. Jang),우남섭(N.S. Woo),김영주(Y.J. Kim) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12

This study have goal with conceptual design for offshore structures of high pressure drop control valve for localization valve for development accomplished with flow analysis based on provision of ANSI B16.34, ANSI B16.10, ANSI B16.25 In order to localize the Offshore structures high pressure drop control valve. This study is numerical analysis for zambil offshore project of high pressure drop control valve. The solver which ANSYS workbench used for offshore structures analysis. The working fluids assumed the glycerin(C3H8O3). The structural analysis used ANSYS which is a commercial code. Stress analysis result of internal pressure in valve showed lower than yield strength. This is expect to need more detail design and verification for stem and disk structure.

Surface characteristics of titanium–silver alloys in artificial saliva

Shim, H. M.,Oh, K. T.,Woo, J. Y.,Hwang, C. J.,Kim, K. N. Heyden & Son 2006 Surface and interface analysis Vol.38 No.1

<P>Titanium and its alloys are widely used in biomedical and dental fields because of their excellent corrosion resistance and biocompatibility. It is well known that titanium is protected from corrosion because of the stability of the passive film that controls and determines the corrosion resistance and biocompatibility of titanium and its alloys. The purpose of this study was to evaluate the electrochemical properties of titanium–silver alloys and the surface characteristics of passive film in artificial saliva.</P><P>We designed titanium–silver alloys with silver contents ranging from 0 to 5 at.%, in 1% increments. These alloys were arc-melted, homogenized, hot-rolled to 2 mm thickness, and finally solution heat-treated for 1 h and quenched. Potentiostatic testing was performed, and the open circuit potentials of the alloys were measured in artificial saliva, at 37 °C. The passive films of the titanium–silver alloys were analyzed via XPS.</P><P>Titanium–silver alloys maintained low current density and showed stable passive region and also had high open circuit potential as compared with pure titanium. The open circuit potential of titanium–silver alloys increased as silver addition increased. With regard to the fraction of oxygen species, a component of over 80% was found to be comprised of oxide. Therefore, the titanium surface mainly consisted of titanium oxide and, on the titanium–silver alloys, this film was composed of TiO<SUB>2</SUB>, Ti<SUB>2</SUB>O<SUB>3</SUB>, and TiO. As silver content increased, the TiO<SUB>2</SUB> fraction also increased, as did the thickness of the titanium oxide layer formed. Copyright © 2005 John Wiley & Sons, Ltd.</P>

International comparison CCQM-K119 liquefied petroleum gas

Brewer, P J,Downey, M L,Atkins, E,Brown, R J C,Brown, A S,Zalewska, E T,van der Veen, A M H,Smeulders, D E,McCallum, J B,Satumba, R T,Kim, Y D,Kang, N,Bae, H K,Woo, J C,Konopelko, L A,Popova, T A,Mesh IOP 2018 Metrologia Vol.55 No.-

<P></P> <P>Liquefied hydrocarbon mixtures with traceable composition are required in order to underpin measurements of the composition and other physical properties of LPG (liquefied petroleum gas), thus meeting the needs of an increasingly large industrial market.</P> <P>This comparison aims to assess the analytical capabilities of laboratories for measuring the composition of a Liquid Petroleum Gas (LPG) mixture when sampled in the liquid phase from a Constant Pressure Cylinder. Mixtures contained ethane, propane, propene, i-butane, n-butane, but-1-ene and i-pentane with nominal amount fractions of 2, 71, 9, 4, 10, 3 and 1 cmol mol<SUP>−1</SUP> respectively.</P> <H2>Main text</H2> <P> To reach the main text of this paper, click on <A HREF='https://www.bipm.org/utils/common/pdf/final_reports/QM/K119/CCQM-K119.pdf'>Final Report</A>. Note that this text is that which appears in Appendix B of the BIPM key comparison database <A HREF='http://kcdb.bipm.org/'>kcdb.bipm.org/</A>.</P> <P>The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).</P>