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Study on the fuel rail temperature and pressure characteristics with LPG composition during hot restart condition of LPi engine with turbine type pump (터빈방식 펌프 LPi연료공급 시스템의 엔진 고온재시동 시 LPG 조성비에 따른 연료레일에서의 압력 및 온도특성에 관한 연구)

  • Lee, Kang-Ju;Kim, Ju-Won;Myung, Cha-Lee;Park, Sim-Soo
    • Proceedings of the KSME Conference
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    • 2007.05b
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    • pp.3323-3328
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    • 2007
  • Conventional LPG pump for Liquified Petroleum injection(LPi) engine has been adopted vane type. But the BLDC type fuel pump for LPi system has complicated structure and its price is high. Therefore, as a alternative, this study has mainly focused on the development of turbine type LPG pump which has lower cost and simple structure than conventional BLDC type. To verify the possibility of substitute the performance tests were performed for each fuel pump. The comparative items were pressure settling time, variation of fuel outlet temperature and engine performance of hot restart ability. As a result, performances of turbine type LPG pump were equivalent or high comparing to the BLDC type all over the tests for different fuel composition.

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Flow and Heat Transfer Characteristics of Tube-and-Plate Condenser with Different Plate Shapes and Inlet Geometries using Numerical Analysis (수치해석에 의한 TUBE-AND-PLATE형 응축기의 판 형태 및 입구 형상변화에 따른 유동 및 열전달 특성)

  • Choi, W.J.;Kwon, O.B.;Lim, H.C.;Kim, M.K.;Lee, Y.S.
    • Journal of Power System Engineering
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    • v.13 no.2
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    • pp.49-55
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    • 2009
  • Recently, a study on condensers for refrigerators has focused on new model which will cost less and will be more efficient. Some widely used condensers for domestic refrigerators are wire-and-tube type condenser, hot-wall type condenser, and spiral type condenser. Some companies which use the spiral type condenser at the moment try to develop a new tube-and-plate type condenser which will cost less and will be as efficient as the spiral type. As a standard condenser type, tube-and-plate type condenser is used in this study. A two-dimensional numerical model for the tube-and-plate type condenser is proposed, and the flow and heat transfer characteristics for several types of condensers are investigated.

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Classifying and analyzing galaxy pairs by their interacting features

  • Bang, Tae-Yang;Park, Myeong-Gu;Park, Changbom
    • The Bulletin of The Korean Astronomical Society
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    • v.39 no.2
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    • pp.64.2-64.2
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    • 2014
  • Interacting galaxy pairs are important for study of galaxy evolution. We selected 8,542 interacting galaxy pairs out of 593,514 KIAS-VAGC galaxy sample with 0.02 < z < 0.047 and r_mag <17.6. We then classified by their interacting features into 6 types by visual inspection. We focused on two types whose spiral tidal features extend to the center of early type galaxy (ETG) or to the edge of ETG. We compared galactic parameters of these two types with those of entire 8,542 pairs as well as between the two types. Preliminary result shows both types are very close pairs (projected distance ~ 20 kpc). Spiral galaxies in the center type are more massive but less bright than those in edge type. ETGs in the edge type are brighter but not more massive than those in the center type. The center type has a mass ratio 3.4 times greater than the edge type, but the edge type has a higher angular momentum than the center type.

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Clothing Pressure and Subjective Sensations Depending on Breast and Bra Type (유방 및 브래지어 유형에 따른 의복압과 주관적 감각)

  • Sohn, Boo-hyun;Choi, Jin-young;Kweon, Soo-ae
    • Journal of the Korean Society of Clothing and Textiles
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    • v.39 no.4
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    • pp.586-600
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    • 2015
  • This study investigates clothing pressure and subjective sensations in brassieres depending on breast type or bra type. The results of this study show that clothing pressure and subjective sensations were significantly influenced by breast type. The flat type breast and drooping type breast have a lower subjective satisfaction. Satisfaction for 3/4WL is the largest; however, 1/2W having low preventing breast shake and no-wire bra having low bust-up or low arrange-breast are required enhancements in bra function. The results are useful to provide basic data and produce high-quality brassieres depending on breast type.

Engineering Characteristics of Horizontal Drainage for Stabilization of Dredged Fill (준설매립지반의 안정처리를 위한 수평배수재의 공학적 특성)

  • 이상호;박정용;장연수;박정순;김수삼
    • Proceedings of the Korean Geotechical Society Conference
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    • 2001.03a
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    • pp.563-570
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    • 2001
  • In this study, the charactersistics of horizontal drains used to stabilize the dredged fill are investigated experimentally by doing tensile strength test, discharge capacity test, and filter clogging test. The types of the drains selected for the study are filament type (Tyre-E), embossed type(Type-P) and heat bonded cubic type with the thickness 10mm(Type-010) and 5mm(Type-05). The results of tensile strength and discharge capacity test show that the performance of drain Type-O10 was better than the other drains. This is caused by the fact that the lattice shape core of drain Type-O10 has strong rigidity and minimizes the loss of the sectional area of discharge with increased confining pressure. Analyzing the compatibility of filters by the results of the strength characteristics test and clogging test, the filter of filament type drain produced with polyester clothed polyamide performed well.

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A Study on the Analysis of the View Target in an Apartment Unit (아파트 각 단위세대에서 보이는 조망 경관 대상 분석에 관한 연구)

  • Kwon, Young-Taek;Moon, Ji-Won;Ha, Jae-Myung
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2004.11a
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    • pp.221-226
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    • 2004
  • View targets have been studied extensively in terms of an aesthetic value and a monetary asset. But there was actually deficient in the research about a variety of view targets. Therefore, the purpose of this paper was to classify systematically into diverse view targets in an apartment unit by the use of both the literature methods and the questionnaire-interview survey. In result, the view targets in an apartment unit were categorized by two large groups which are a natural-type and an artificial-type view. The former was subdivided into a pure natural-type and a man-made natural-type view, while the latter was subdivided into a building-type, a street-furniture-type, a road-type, a open-space-type, and a tower-type view. Consequently, this study might be applied to the understanding of the quality of residential environment as a basis.

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The Career Attitude and Career Choice of Cosmetology University Students (미용학과 학생들의 진로태도와 진로선택성향)

  • Hong, Bo-Kyung
    • The Korean Journal of Health Service Management
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    • v.6 no.2
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    • pp.151-164
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    • 2012
  • The objective of this study is to explore the relationship between MBTI personality type and career attitude and career choice of cosmetology university students. Data were collected by self-administered questionnaires. Chi-square test and logistic regression analysis was conducted. The major findings of this study are as follows: In regard to career-related attitude, ISTJ type out of 16 MBTI is higher than other type on the positive attitude. In regard to the relationship of MBTI and career choice, ISTP, ISFP and ENFJ type is more prefer skin care than the other type. And INTP type is more prefer hair design and makeup. And also the psychological functional type and career choice, ST showed the preference on skin care, and SF preferred makeup field. Finally NT and NF psychological functional type showed the preference on hair design.

A Study on the Architectural Design Plans Using BIPV (BIPV를 활용한 건축물 디자인 계획에 관한 연구)

  • Juen, Guen-Sik;Ryu, Soo-Hoon
    • Journal of The Korean Digital Architecture Interior Association
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    • v.12 no.3
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    • pp.5-13
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    • 2012
  • In this study, features and design effects of PV(Photovoltaic) modules were classified to help the installation of BIPV(Building Integrated Photovoltaic) In addition, through domestic and international trends and cases survey, installation method was organized and applicable range of efficiency and design from First-generation solar cells to the third-generation solar cell was classified. Frist, Crystalline Solar cell module of first-generation is appropriate for the wall type, roof, louver, shading and etc. It has superiority of technology and price stability and can be achieved by a variety of aesthetic effects. Second, Dye-Sensitized Solar Cell of Thin Film solar cell can express a variety of colors, adjust light transmittance and maximize the aesthetic splendor. It is appropriate for the wall type, window type, curtain wall type and etc. Also, see-through type solar cell can provide comforts cause of free flow of light. And it is advantageous from economic due to adjust the indoor temperature. It is appropriate for the atrium type, curtain wall type, window type and etc.

A Study on the Relationship between Personality Type, GPA of Student Majoring in Flight Operation (항공운항전공학생의 성격유형과 학업성취도의 관계에 대한 연구)

  • Han, K.K.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.13 no.3
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    • pp.1-8
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    • 2005
  • The purpose of this study was to identify the relationship between personality type and GPA scores of the student majoring flight operation. The data were collected from 96 "H' University student. MBTI Test was selected and used to analyze student's personality type. The results from MBTI Test and GPA scores were analyze by SPSS 10.0 package. I found that E, S, T, J Type, SJ, ST Type, ESTJ, ISTJ Type student are dominated. There were no significant relationship between personality type and GPA scores. The effective teaching strategies have to be considered for each personality type for better education.

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A Study on the MBTI Personality Type Change of the Korean Medical Students (한의대생의 MBTI 성격유형의 변화에 대한 연구)

  • Lee, Jae-Hyok
    • Journal of Oriental Neuropsychiatry
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    • v.30 no.2
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    • pp.39-45
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    • 2019
  • Objectives: To study the change of personality types of Korean medical students focusing on the Myers-Briggs Type Indicator. Methods: A survey was conducted on 84 Korean medical students to investigate the change of personality types focusing on the Myers-Briggs Type Indicator. Results: In both freshman and senior student groups, the ISTJ was the most common type. The order of the number of the type changes during the university years was 1 type (45.2%)>2 types (23.8%)>3 types (14.3%)>0 types (11.9%)>4 types (1.8%), and the score of I, S, T, P type increased. Conclusions: As a result of the Korean medical students' MBTI type changes during the university years, the types were changed rather than fixed.