• Title/Summary/Keyword: pillars

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A Study on the Head of PHC Repair Applying the Reinforcement of Bending the Rebar (절곡보강철근을 적용한 PHC말뚝의 머리보강에 관한 연구)

  • Hong, Suk-Hee;Park, Hong-Sick;Kim, Eun-Kyum
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2450-2455
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    • 2011
  • The importance for the department combined is increased concerning structures and pile foundation with the introduction of structures in sesmic design of structures. Therefore, the railway bridge and the road bridge standards approach for the earthquake about above the department combined by using strong coupling. Also, mechanical interpretation is performed as foundation combined with the head of pile foundation assuming the pillars. Accordingly, this study suggests the head of PHC repair can enhance the load carrying capacity and constructability of the department combined after bending, pulling, shear and compressive tests by appling the reinforcement of bending the rebar, the reinforcement of pulling the rebar.

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Lap joint Laser Welding of Hot Stamped Ultra High Strength Steel for Automotive Application (자동차용 핫스탬핑 고강도강 판재의 겹치기 레이저용접)

  • Kim, Yong;Park, Ki-Young;Lee, Kyoung-Don
    • Laser Solutions
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    • v.15 no.1
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    • pp.1-5
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    • 2012
  • Recently ultra high strength steels(UHSS) has been widely applied to the structural or safety components in the automotive industry. Specially, hot stamping boron steel 22MnB5 has shown the crash-resistant characteristics when applying to bumpers and pillars. Lap joint Laser welding of the hot stamped and die quenched sheets of Boron steel was carried out using 3kW Nd/YAG laser. The appropriate Lap joint laser welding conditions were founded separately for four lap joint combinations. The lower sheest is a hot stamped sheet in common and the upper sheet is selected among the hot stamped steel and high strength steels such as SPCC, 370MPa, and 590MPa grade high strength steels. Cross bead sections and local hardening and softening were observed as well as tensile-shear test results.

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Technological Catching-up of Nuclear Power Plant in Korea: The Case of OPR1000

  • Lee, Tae Joon;Lee, Young-Joon
    • Asian Journal of Innovation and Policy
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    • v.5 no.1
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    • pp.92-115
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    • 2016
  • This paper presents how Korea succeeded in developing an indigenous nuclear power plant model over fifty years. Long-lasting national R&D for technical progress and the Korean government for managerial process were the two pillars in the build-up of indigenous Nuclear Power Plant (NPP) technological capabilities. The concept of technological capabilities is used to examine its evolutionary process with a qualitative and longitudinal approach. The government had a developing country ambition to formulate a strategic plan for technical self-reliance on nuclear power plant while establishing the country’s institutions and organization structure for the plan. Under the government leadership, it was national R&D that led to the resolution of a good number of technological problems, efficiently, by absorbing imported technologies and effectively adapting them to local circumstances.

A Study on Women′s Dress of Song Dynasty (宋代 女子服飾에 대한 考察)

  • 이순자
    • The Research Journal of the Costume Culture
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    • v.3 no.2
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    • pp.215-240
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    • 1995
  • Costumes of Song Dynasty developed after the patterns of the Tang. The rise of idealist philosophy in the Song Dynasty had a great impact on the life of the people, Under the influence of this ideology, people's views on aesthetics changed considerable. In architecture, for example, white washed walls and black tiles came into fashion. balustrades, pillars and roof beams were left unpainted so as to retain the true colour of he wood. In painting, also, simplicity and delicacy were valued, and the preferred medium was ink or light colours. The desire for simplicity was even more evidently reflected in clothing and related adornment, as public opinion was against excessive display in dress. Consequently, the clothing of the Song Dynasty was quite reserved and conservative, with fewer variations and quieter colours, thus conveying a feeling of simplicity and naturalness. Compared with the dress of Tang, the dress of the Song Dynasty had other variations. Therefore women's dress of Song was also reserved and conservative, with fewer variations and quieter colours, simplicity and naturaliness.

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A Confirmatory Model for Sustainability of Apparel Brands and Its Impact on Brand Outcomes

  • Park, Hyejune
    • International Journal of Costume and Fashion
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    • v.16 no.1
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    • pp.55-70
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    • 2016
  • The existing research on sustainability in the apparel industry provides no clear consensus on the definition of sustainability for the apparel brands and how sustainability of apparel brands as it is perceived by consumers can be measured. To fill this gap in research, the present study proposes and tests a confirmatory model of sustainability for apparel brands based on the three pillars of sustainability (i.e., economic, environmental, social sustainability) theorized in the Triple Bottom Line model. A survey of 754 U.S. consumers provided data for empirical testing. The results support the three-dimensional factor structure of sustainability for apparel brands and reveal that a second-order sustainability exerts a significant impact on both brand image and brand trust. The findings provide theoretical implications for researchers and practical managerial suggestions for marketers.

Analysis of Lightning Current Distribution for Reducing the Conductive EMI in a Structure (도전성 EMI 저감을 위한 구조체의 뇌격전류 분류율 분석)

  • Cho, Sung-Chul;Lee, Tae-Hyung;Eom, Ju-Hong;Lee, Bok-Hee
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1630-1631
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    • 2011
  • Lightning current distribution in a building directly hit was studied by using a scaled steel frame structure model. As the test current source, impulse current with the rise time of 10 ${\mu}s$ and sinusoidal current with the frequency of 30 kHz were used to confirm the validity of test results. The current distributions at both horizontal and vertical pillars were measured by using CT. From the test results, the reduction effect for the conductive EMI was verified and a design method reducing the conductive EMI was proposed.

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A Study About Biochip Combined with Micro Mixer and Reactor for DNA Ligation (마이크로 혼합기와 반응기로 구성된 DNA 결찰용 바이오칩에 관한 연구)

  • Kang, Do-Hyoung;Ahn, Yoo-Min;Hwang, Seung-Yong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.32 no.8
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    • pp.624-632
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    • 2008
  • In this research, we developed new PDMS-glass based microbiochip consisted of the micromixer and microreactor for DNA ligation. The micromixer was composed of a straight channel integrated with nozzles and pillars, and the microreactor was composed of a serpentine channel. We coated the PDMS chip surface with the 0.25wt.% PVP solution to prevent the bubble generation which was caused by the hydrophobicity of the PDMS. The new micomixer was passive type and the mixing was enhanced by a convective diffusion using the nozzle and pillar. The 10.33mm long micromixer showed the good mixing efficiency of 87.7% at 500 l/min flow rate. We could perform the DNA ligation successfully in the microbiochip, and the ligation time was shortened from 4 hours in conventional laboratory method to 5 min in the microbiochip.

Virtual Learning Environments for Statistics Education and Applications for Official Statistics

  • Mittag Hans-Joachim
    • Proceedings of the Korean Statistical Society Conference
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    • 2004.11a
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    • pp.307-312
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    • 2004
  • In our fast-moving information and knowledge society, skills and know-how rapidly become outdated. Virtual learning environments play a key role in meeting today's growing demand for customized educational and vocational training and lift-long teaming. The scope of multimedia-based and web-supported education is illustrated by means of an interdisciplinary multimedia project 'New Statistics' funded by the German government. The project output contains more than 70 learning modules covering the complete curriculum of an introductory statistics course. All modules are based on a statistical laboratory and on a multitude of Java applets, animations and case studies. The paper focuses on presenting the statistical laboratory and the applets. These components present the main project pillars and are particularly suitable for international use, independently from the original project framework. This article also demonstrates the application of Java applets and other multimedia developments from the educational world to official statistics for interactive presentation of statistical information.

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Optimization of 1-3 Type Piezocomposite Structures Considering Inter-Pillar Vibration Modes (Inter-Pillar 진동 모드를 고려한 1-3형 압전복합체의 구조 최적화)

  • Pyo, Seonghun;Kim, Jinwook;Roh, Yongrae
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.6
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    • pp.434-440
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    • 2013
  • With polymer properties and ceramic volume fraction as design variables, the optimal structure of 1-3 piezocomposites has been determined to maximize the thickness mode electromechanical coupling factor. When the piezocomposite vibrates in a thickness mode, inter-pillar resonant modes are likely to occur between lattice-structured piezoceramic pillars and polymer matrix, which significantly deteriorates the performance of the piezocomposite. In this work, a new method to design the structure of the 1-3 type piezocomposite is proposed to maximize the thickness mode electromechanical coupling factor while preventing the occurrence of the inter-pillar modes. Genetic algorithm was used for the optimal design, and the finite element analysis method was used for the analysis of the inter-pillar mode.

The formation of nano pillar arrays with p-type silicon using electrochemical etching (Electrochemical etching을 이용한 P형 실리콘에서의 nano pillar arrays 형성)

  • Ryu, Han-Hee;Kong, Seong-Ho;Kim, Jae-Hyun
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1529_1530
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    • 2009
  • The process conditions for fabricating p-type silicon pillars were optimized by controlling current density, bath temperature. To get best process flexibility for pillar arrays formation, three factors affecting pillar formation were changed. First, the solution bath was designed to keep constant temperature during the experiment irrespective of external temperature. Second, the counter Pt electrode was changed from rod type to mesh to obtain uniform distribution of current density. Third, Cr-Cu alloy electrode instead of Cu was used to increase electrode current density.

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