• Title/Summary/Keyword: Material Composition

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A Study on the Plan Composition of Public Part of the Luxury Resort Hotels in Jeju-Do (제주도 특급관광호텔의 공공부분 평면구성에 관한 연구)

  • 박철민;김학진
    • Korean Institute of Interior Design Journal
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    • no.38
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    • pp.153-163
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    • 2003
  • In order to overcome such limits of hotel sales, the role of hotel public section, such as eating and drinking facilities, is very important. Moreover, city hotels increase the value of public section by providing various event for citizens as well as and services for banquet. Since Jeju has urban hotels and resort hotels mixed together, their Plane types and area composition based on the characters of customers using the public section are different from ones of other cities. The purpose of this study is to provide basic material for the qualify improvement of the luxury resort hotels in Jeju. We examine the tendency of the systematic Plane composition of the Public sections which take different types of customers, such as Jeju people and tourists, into consideration, analyzing the plane types and the area composition of the luxury resort hotels in Jeju. The study shows that the public part of hotels always had great impact on hotels sales depending on the compositions of plane and area.

Study of Weld Part Status Change by $CO_2$ Welding According to the Variation of Gas Composition and Welding Wire on SS400 Material (가스성분 및 용접와이어의 변화에 따른 SS400소재의 $CO_2$용접에서 용접부의 상태변화 고찰)

  • Kim, Bub-Hun;Kim, Won-Il;Choi, Chang;Park, Yong-Hwan
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.5
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    • pp.129-136
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    • 2012
  • On this study, $CO_2$ gas, net of Ar gas, and mixed gas in solid wire(AWS ER 70S-6) and flux cored wire(AWS E71T-1) were used to weld on Mild steel(SS400). After the progress, the status changes of the welds in Mild steel(SS400) were investigated with compositional changes. For stable experiments, welding was conducted using the automatic feeder. Radiation testing, hardness testing, chemical composition analysis and penetrated cross-section were measured. Through these experiments, shapes of penetrated cross-section, chemical composition changes, and weld defects according to the variation of welding gas were known. Weld defects and weld cross-sectional shapes by the variation of the welding voltage were also detected.

Studies on the Amino Acids Composition of Makjang (막장의 아미노酸 組成에 關한 硏究)

  • Hong Dae Shin;Joo Ok Yoon
    • Journal of the Korean Chemical Society
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    • v.7 no.1
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    • pp.6-12
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    • 1963
  • Amino acid composition of Makjang was determined by combined usage of ion exchanged resin and paper chormatography in the following states. a. A fraction soluble in water b. Hydrolysate of the whole Makjang c. Same as a. (p.p.t. formed by tungstic acid or trichloroacetic acid being removed) d. Hydrolysate of c. (T and TCA) By comparing amino acid composition of Makjang with that of its raw material, we found that decomposition of essential amino acids during brewing is slight. From the amino acid composition of a,b,c,d, we discussed the ratio of amino acid liberation during brewing and assumed that Makjang contains peptide-like substances composing of glutamic acid and aspartic acid.

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Assessing the Impact of Locally Produced Aerosol on the Rainwater Composition at the Gosan Background Site in East Asia

  • Han, Yeongcheol;Huh, Youngsook
    • Asian Journal of Atmospheric Environment
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    • v.8 no.2
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    • pp.69-80
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    • 2014
  • It is often assumed that atmospheric observations at remote sites represent long-range transport of airborne material, and local influences are overlooked. We evaluated the impact of local input on the rainwater composition at Gosan Station, a strategic site for monitoring the continental outflow from Asia. We analyzed a 14-year record of rainwater chemical composition archived by the Korea Meteorological Administration and detected local terrestrial contribution for nitrate, sulfate and ammonium. We also measured the chemical composition of rainwater sampled simultaneously at multiple locations within the premises of the Gosan Station, from which local influence with meter-scale spatial heterogeneity could be discerned. We estimate that the local input accounted for at least ~10% of the wet deposition of nitrogen and ~12% of the wet deposition of sulfur during the 14 years. This highlights the significance of the local influence, which should be carefully assessed when interpreting atmospheric observations at this site.

Properties of $\beta$-Sialon Prepared from Korean Natural Resources (한국산 천연원료로부터 $\beta$-Sialon의 합성 및 그 특성)

  • 임헌진;이홍림
    • Journal of the Korean Ceramic Society
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    • v.26 no.3
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    • pp.402-408
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    • 1989
  • $\beta$-Sialon powder was synthesized by the simultaneous reduction and nitridation of the mixed powder of Hadong kaolin and Kimcheon quartzite, using graphite as a reducing agent. The synthesized $\beta$-Sialon powder (Z=1) was hot-pressed at 175$0^{\circ}C$, for 90min under 30MPa in N2 atmosphere, after Yttria and YAG composition material were added as sintering agents. The effects of grain-boundary crystallization on high-temperature mechanical properties of $\beta$-Sialon ceramics were investigated. Strength degradation was observed at above 1,00$0^{\circ}C$ for the $\beta$-Sialon (Z=1)-8wt% Y2O3 composition, but it was not observed up to 1,20$0^{\circ}C$ for the $\beta$-Sialon-8wt% YAG composition which was annealed at 1,40$0^{\circ}C$ for 4 hours in N2 atmosphere. After the $\beta$-Sialon-8wt% YAG composition was annealed, the decrease of fracture toughness was observed.

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A Study on the Architectural Planning of Spatial Composition in Charnel Facilities (납골시설의 공간구성에 관한 건축계획적 연구 - 서울, 경기도의 납골당을 중심으로 -)

  • Chio, Jin-Won;Park, Jae-Seung
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.10 no.2
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    • pp.19-27
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    • 2004
  • The purpose of this study is to the spatial composition of charnel facilities. The study method is as follow: First, To Examine existent research material about charnel house. Second, To Investigate controversial point of equipment and development direction through research the case of cremated human remains deposit rooms in 12 charnel houses constructed since 1990. So, to propose the planning direction of spatial composition based on the analysis results and utilize to basis data that is necessary in research of same kind hereafter.

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Electrical Characteristics of Piezoelectric Transformer Composition Pb(Sb1/2Nb1/2)-Pb(Ni1/3Nb2/3)O3-Pb(Zr1Ti)O3 Ceramics for Adaptor (Adaptor용 압전트랜스포머조성 Pb(Sb1/2Nb1/2)-Pb(Ni1/3Nb2/3)O3-Pb(Zr1Ti)O3세라믹스의 전기적 특성)

  • 윤광희;오동언;류주현
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.15 no.6
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    • pp.499-503
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    • 2002
  • In this study, to develop the high power piezoelectric transformer for adaptor, PSN-PNN-PZT system ceramics were formulated as a function of $MnO_2$ addition and its dielectric and piezoelectric characteristics were investigated. Multi-layer piezoelectric transformer using an excellent composition was also fabricated and its electrical properties evaluated. The composition ceramics added to 0.5wt%$MnO_2$ showed the maximum value of $k_p=0.61$ and $Q_m=1.321$. As the output power of piezoelectric transformer is increased, its temperature rise increased. At the fixed 18W output power, the transformer was stably operated.

Electrical Properties of CuInS$_2$Ratio (Cu/In 성분비에 따른 CuInS$_2$박막의 전기적 특성)

  • Park, Gye-Choon;Jeong, Woo-Seong;Chang, Young-Hak;Lee, Jin;Jeong, Hae-Duck
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1995.11a
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    • pp.109-112
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    • 1995
  • CuInS$_2$thin film was prepared by heat treatment at vacuum 10$\^$-3/ Torr of S/In/Cu stacked layer which was deposited by sequential. And so, the polycrystalline CuInS$_2$with chalcopyrite structure was well made at heat treatment temperature of 250$^{\circ}C$ and heat treatment time of 60 min. Single phase of CuInS$_2$was formed from Cu/In composition ratio of 0.84 to 1.3. p conduction type of CuInS$_2$thin film was appeared from Cu/In competition ratio of 0.99. The highest resistivity of CuInS$_2$with p type was 1.608${\times}$10$^2$$\Omega$cm at Cu/In composition ratio of 0.99 and The lowest resistivity was 5.587${\times}$10$\^$-2/$\Omega$cm at Cu/In composition ratio of 1.3.

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Development of Composite Tension.Compression Anchor System based on the pull out resistance characteristics of Ground Anchor (지반앵커의 인발저항 특성에 따른 인장.압축 복합 시스템 개발)

  • Yeom, Ho-Hyeong;Im, Jong-Chul;Hong, Seok-Woo;Kim, Chul-Ung;Shin, Chul-Sung
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.788-795
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    • 2005
  • In this study, the progressive failure and creep of the traditional ground anchor structure were decreased and a new ground anchor that can attain the required pull-out resistance even in soft sandy soils with low confining pressure was developed. Ground anchors are classified depending on the kind of stress the grout is subjected. If the grout material is subjected to tension then it is classified as tension anchor while when the grout material is subjected to compression it is classified as compression anchor. The ground anchor that possesses both the tension and compression mechanism mentioned above is known as composition anchor. It is the objective of this study to develope this type of composition anchor. The structure of the newly developed ground anchor was presented. Pull-out test in different types of soil and the behaviour during Pull-out test was also presented.

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The Effect of Rare-Earth Additives on Dielectric Properties of X7R MLCC Composition (X7R용 적층 칩 세라믹 캐패시터 조성의 희토류 첨가에 따른 유전 특성)

  • 이석원;윤중락
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.16 no.12
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    • pp.1080-1086
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    • 2003
  • Effects of E$_2$O$_3$. HO$_2$O$_3$ and Dy$_2$O$_3$ addition on dielectric properties of non-reducible BaTiO$_3$ based X7R dielectrics with Ni electrode have been studied in a reduced atmosphere. As the content of rare-earth with E$_2$O$_3$. HO$_2$O$_3$, Dy$_2$O$_3$ was less than 3wt%, The TCC(Temperature Capacitance Change) and insulation resistance characteristics were improved by compensate the oxygen vacancies due to occupy either the Ba or Ti site. We developed the composition of X7R (EIA standard) for higher capacitance MLCC which had high reliability electric properties by the addition of Er ion into BaTiO$_3$ + MgO + Y2O$_3$ + MnO + (Ba$\sub$0.4/Ca$\sub$0.6/)SiO$_3$ composition.