• Title/Summary/Keyword: asymmetrical structures

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Supplier-assembler Network Structure and Capability Improvement of Suppliers in Newly Emerging Vietnam's Motorcycle Industry

  • Pham Truong Hoang;Shusa Yoshikazu
    • Journal of Technology Innovation
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    • v.14 no.2
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    • pp.143-165
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    • 2006
  • By analyzing five in-depth case studies of suppliers in newly emerging Vietnam's motorcycle industry, this paper explores the differences in patterns and processes of capability improvement of suppliers who participate in different kinds of supplier-assembler network with different structures. The paper finds the correlation between the kinds of suppliers' capabilities improved and the structure of networks they participate in. While suppliers in arm-length networks can improve more upstream capabilities (structure design, process desist), suppliers in embedded networks can improve more downstream capabilities (process design, process setup, process maintenance and delivery control). Two capability improvement patterns of firms in newly emerging economy are indicated. The first pattern is asymmetrical improvement, either upstream or downstream capabilities, by participating in either arm-length or embedded networks. This pattern obstructs the suppliers to meet the requirements of new buyers rho come from different kinds of network. The second pattern is symmetrical improvement by joining both arm-length and embedded networks.

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Effects of Solutally Dominant Convection on Physical Vapor Transport for a Mixture of Hg2Br2 and Br2 under Microgravity Environments

  • Kim, Geug-Tae;Kwon, Moo Hyun
    • Korean Chemical Engineering Research
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    • v.52 no.1
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    • pp.75-80
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    • 2014
  • The convective flow structures in the vapor phase on earth are shown to be single unicellular, indicating the solutally dominant convection is important. These findings reflect that the total molar fluxes show asymmetrical patterns in a viewpoint of interfacial distributions. With decreasing the gravitational level form $1g_0$ down to $1.0{\times}10^{-4}g_0$, the total molar fluxes decay first order exponentially. It is also found that the total molar fluxes decay first order exponentially with increasing the partial pressure of component B, PB (Torr) form 5 Torr up to 400 Torr. Under microgravity environments less than $1g_0$, a diffusive-convection mode is dominant and, results in much uniformity in front of the crystal regions in comparisons with a normal gravity acceleration of $1g_0$.

Analysis of characteristics on symmetric/asymmetric broadside-coupled coplanar waveguide using the spectral domain approach (주파수 영역 해석법을 이용한 대칭/비대칭 광역결합 동일 평면도파관 선로의 특성 해석)

  • 유태훈;홍익표;이용국;박한규
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.22 no.9
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    • pp.1968-1974
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    • 1997
  • In this paper, the spectral domain approach is employed to investigate the characteristics of symmetrical and asymmetrical broadside-coupleed coplanar waveguides(BSC-CPW). These structures have large even(c)-odd(.pi.) mode-velocity ratio, suitable for wide-band and tight-coupling microwave circuit design. Efficient design parameters can be obtained from the effective dielectric constants and characteristic impedances calculated by varying the strip widths and slot widths in the BSC-CPW structure.

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Effect of Plan Irregularity and Beam Discontinuity on Structural Performances of Buildings under Lateral Loadings

  • Islam, Md. Rajibul;Chakraborty, Sudipta;Kim, Dookie
    • Architectural research
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    • v.24 no.2
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    • pp.53-61
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    • 2022
  • Irregularities in the structure are crucial factors in screening structural vulnerability under extreme loadings. Numerical analyses were carried out considering wind and seismic loadings for four structures with discrete irregularity: continuous and discontinuous beams with varied story levels, and L-shaped irregular buildings. Structural responses such as maximum displacements, bending moments, axial forces, torsions, and story drifts are evaluated as per the criteria and limits defined by ACI 318. The outcomes indicate that the frame system with beam discontinuity on the upper half of the height exhibits the best structural performance. The results also indicate that the asymmetrical design of the L-shaped model makes it more susceptible to damage when subjected to strong lateral loading conditions.

Case of Prominent Periorbital Vein after Lower Eyelid Blepharoplasty Treated with a Long-pulse 1,064-nm Neodymium: Yttrium-aluminum-garnet Laser

  • Kim, Wan Jin;Cho, Han Kyoung;Lee, Sang Ju
    • Medical Lasers
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    • v.9 no.2
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    • pp.184-186
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    • 2020
  • Lower eyelid blepharoplasty is a popular facial rejuvenation surgery that restores the infraorbital region. The procedure is performed by removing excessive fatty tissues, muscles, and other unnecessary structures. The structure of the eyelid differs from person to person and is quite complex; therefore, numerous side effects are expected. Common lower eyelid blepharoplasty complications are asymmetrical faces, retrobulbar hemorrhage, blurred vision, and ectropion. This paper reports a case of a prominent periorbital vein after lower eyelid blepharoplasty. The prominent periorbital vein after surgery is a rare side effect that has not been reported to the best of the author's knowledge. This case was treated with a long-pulse 1,064-nm neodymium:yttrium-aluminum-garnet laser.

Evaluation of Subway Induced Vibration Effects on Building Structures (지하철 운행에 의한 건축물 진동 평가)

  • Seo, Jeong-Beom;Park, Yong-Suk;Hong, Sung-Chul
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.9 no.5
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    • pp.1107-1112
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    • 2008
  • Since vibration properties of a building structure were not easy to find out through a test, it was very difficult to in advance evaluate an influence of earthquake or other excitations on the building structure. However, currently, along with the development of the vibration analysis technique, it is possible to predict the structural performances of the buildings. The prediction of the vibration properties of the building structure has mainly employed a two-dimensional plane analysis so far, but not a three-dimensional analysis. The two-dimensional plane analysis encounters a reliability problem when the building is asymmetrical. This study has performed a three-dimensional modeling and vibration analysis on residential buildings when a subway passes below.

Optimal assessment and location of tuned mass dampers for seismic response control of a plan-asymmetrical building

  • Desu, Nagendra Babu;Dutta, Anjan;Deb, S.K.
    • Structural Engineering and Mechanics
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    • v.26 no.4
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    • pp.459-477
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    • 2007
  • A bi-directional tuned mass damper (BTMD) in which a mass connected by two translational springs and two viscous dampers in two orthogonal directions has been introduced to control coupled lateral and torsional vibrations of asymmetric building. An efficient control strategy has been presented in this context to control displacements as well as acceleration responses of asymmetric buildings having asymmetry in both plan and elevation. The building is idealized as a simplified 3D model with two translational and a rotational degrees of freedom for each floor. The principles of rigid body transformation have been incorporated to account for eccentricity between center of mass and center of rigidity. The effective and robust design of BTMD for controlling the vibrations in structures has been presented. The redundancy of optimum design has been checked. Non dominated sorting genetic algorithm (NSGA) has been used for tuning optimum stages and locations of BTMDs and its parameters for control of vibration of seismically excited buildings. The optimal locations have been observed to be reasonably compact and practically implementable.

Semiotic Analysis of Expressive Features and Structural Meanings in Traditional Furniture of Korea, China and Japan - Focus on the Storage Furniture from 17th to 19th century - (한중일 전통가구에 나타난 표현과 의미의 기호학적 분석 - 17~19세기 수납가구를 중심으로 -)

  • Kim, Eun-Jeong;Park, Young-Soon
    • Korean Institute of Interior Design Journal
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    • v.22 no.1
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    • pp.183-193
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    • 2013
  • The study aimed to find the fundamental differences of aesthetics in Korea, China, and Japan by analyzing expressive features and structural meanings of the storage furniture from $17^{th}$ to $19^{th}$ century. The study was performed in four steps; analysis of expressive features, isotopic analysis, semantic structure analysis, and comprehensive interpretation. The results showed that three countries had linear shapes with curvilinear elements, closed forms with open spaces, natural material hues with change of tone or color, and symmetrical forms with asymmetrical patterns and structures in common. Korea comparatively accented on the natural material colors and wood grains. China stressed on the big and wide faces using three-dimensional carving. Japan accented on the linear elements with strong color contrast and decorative metal fixtures. These features were caused by the traditional thoughts and according aesthetic principles. Korea and China were affected by the Confucianism focused on establishing the order of rank. Meanwhile, Japan was more influenced by the Buddhism emphasized on the individuality and communication. Therefore, the differences of the expressive features in furniture among the three countries were inevitable consequences of the different ideologies.

Transformerless Three-Level DC-DC Buck Converter with a High Step-Down Conversion Ratio

  • Zhang, Yun;Sun, Xing-Tao;Wang, Yi-Feng;Shao, Hong-Jun
    • Journal of Power Electronics
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    • v.13 no.1
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    • pp.70-76
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    • 2013
  • For high power high step-down dc-dc conversion applications, conventional three-level dc-dc converters are subject to extreme duty cycles or increased volume and cost due to the use of transformers. In this paper, a transformerless three-level dc-dc buck converter with a high step-down conversion ratio is proposed. The converter comprises two asymmetrical half bridges, which are of the neutral point clamped structures. Therefore, the output pulse voltage of the converter can be obtained in terms of the voltage difference between the two half bridges. In order to realize harmonious switching of the converter, a modulation strategy with capacitor voltages self balance is presented. According to the deduced output dc voltage function, transformerless operation without extreme duty cycles can be implemented. Experimental results from a 1kW prototype verify the validity of the proposed converter. It is suitable for ship electric power distribution systems.

A Study on the Formativeness of Russian Constructivism in Modern Fashion (현대 패션에 나타난 러시아 구성주의의 조형성에 관한 연구)

  • Sohn, Ho-Young;Kan, Ho-Sup
    • Journal of the Korean Society of Costume
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    • v.61 no.10
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    • pp.1-15
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    • 2011
  • Constructivism is an avant-garde movement that began in 20th-century Russia, which rapidly turned into an industrial society. This was one of the most experimental art movements, that wanted to be at the center of social and political-ideological change as it pursued a unique style, which portrayed the true essence of art and humanity. Russian constructivism greatly influenced modern fashion and suggested a new artistic standard. First, the artistic elements of Russian constructivism include photo montages, geometrical structures, color abstraction, and an asymmetrical order, through which the ideals of the Russian Revolution were substantiated, idealized, and materialized into an artistic form. Second, the different forms of Russian constructivism have various artistic characteristics such as popularity, spatiality, structuralism, decorativeness, and mobility, which were then expressed in modern fashion elaborated below. This study intends to reconstruct the meaning of Russian formalism and reflect it on fashion; thereby reconsidering the characteristics and the meaning of Russian constructivism in the context of today's fashion. This will broaden the meaning of constructivism and suggest a new direction for modern fashion.