• Title, Summary, Keyword: RE_ETC

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A Strategical Review on the Rare Earth (희토류에 관한 심층적인 고찰)

  • Lee, Hyo-Sook
    • Journal of the Korean Professional Engineers Association
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    • v.44 no.2
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    • pp.39-42
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    • 2011
  • The main concern at the moment is securing rare earth(RE) resources, because the RE is the essential elements in green technology such as hybrid car, wind power plant, LED, display etc. It's impossible Korea will be a advanced country without securing RE. The importance of investment radically in the securing RE resources and professional engineers can not be overinvested.

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A study on the geometry of 2-dimensional re-manifold $X_2$

  • Hwang, In-Ho
    • Journal of the Korean Mathematical Society
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    • v.32 no.2
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    • pp.301-309
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    • 1995
  • Manifolds with recurrent connections have been studied by many authors, such as Chung, Datta, E.M.Patterson, M.Prvanovitch, Singal, and TAkano, etc (refer to [2] and [3]). Examples of such manifolds are those of recurrent curvature, Ricci-recurrent manifolds, and birecurrent manifolds.

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Scan Cell Grouping Algorithm for Low Power Design

  • Kim, In-Soo;Min, Hyoung-Bok
    • Journal of Electrical Engineering and Technology
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    • v.3 no.1
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    • pp.130-134
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    • 2008
  • The increasing size of very large scale integration (VLSI) circuits, high transistor density, and popularity of low-power circuit and system design are making the minimization of power dissipation an important issue in VLSI design. Test Power dissipation is exceedingly high in scan based environments wherein scan chain transitions during the shift of test data further reflect into significant levels of circuit switching unnecessarily. Scan chain or cell modification lead to reduced dissipations of power. The ETC algorithm of previous work has weak points. Taking all of this into account, we therefore propose a new algorithm. Its name is RE_ETC. The proposed modifications in the scan chain consist of Exclusive-OR gate insertion and scan cell reordering, leading to significant power reductions with absolutely no area or performance penalty whatsoever. Experimental results confirm the considerable reductions in scan chain transitions. We show that modified scan cell has the improvement of test efficiency and power dissipations.

Secure-ReXpis System with Internet Environment

  • Ahn, Kyeong-Rim
    • Proceedings of the CALSEC Conference
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    • pp.165-176
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    • 2001
  • * Extension of EC(Electronic Commerce) * Standard of Message -EDI : UN/EDIFACT, ANSI X12, etc -XML : ebXML, CML, MathML, WIDL, etc * Various of Information -Business Transaction Data -Private Data : ID, Password, Personal Information -Charge Data : Accounts, Card, etc * Message Level Security(omitted)

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The Design and Implementation of Secure-ReXpis System with Internet Environment (인터넷 환경 하에서의 Secure-ReXpis 시스템 설계 및 구현)

  • 안경림;박상필;백혜경;임병찬;박준홍;고대식
    • The Journal of Society for e-Business Studies
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    • v.6 no.3
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    • pp.101-113
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    • 2001
  • Security is very important in EC(Electronic Commerce) environment because exchanged information(that is transaction details, private data, charges data(card-no, accounts), etc) is various and is very sensitive. So, In this paper, we propose Secure-ReXpis(Reliable St excellent Xh3 Processing Infrastructure) System that transfer message and support Message Level Security(Encryption/Decryption and Digital Signature). And we implement Message Confidentiality Service, User Authentication & Message Integrity Service and Non-Repudiation Service among the various Security Services. This system support XML message format and EDI message, WEB Data and Private Format Data, etc.

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Impedance Analysis of Resistance Anomaly of $BaTiO_3$ based PTC thermistor

  • Chun, Myoung-Pyo;Myoung, Seong-Jae;Nam, Joong-Hee;Cho, Jeong-Ho
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.182-182
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    • 2009
  • The effect of Re-oxidation on the PTCR properties of Sm-doped barium titanate ceramics was investigated by means of impedance spectroscopy. Electrical properties such as resistance vs. temperature, I-V curve were measured and microstructure was observed with SEM photography. Sample was fabricated with thick film process such as tape casting of green sheet, screen printing of electrode pattern, stacking, firing in reduced atmosphere and re-oxidation, etc. As the temperature of re-oxidation increases, resistance jump as a function of temperature enhances but resistance at room temperature increases. These behavior of resistance as a function of temperature, dependent on the re-oxidation condition, is analyzed with Cole-Cole impedance plot and is shown to be related with the degree of oxidation of grain boundary regardless of grain core during re-oxidation process of sample.

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Type Classification of Contemporary Hanok -Focusing on Architects' Designs since 2000- (현대한옥의 유형 분류 -2000년 이후 건축가의 디자인을 중심으로-)

  • Lee, Yong-Hee;Kim, Hyon-Sob
    • Journal of architectural history
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    • v.25 no.5
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    • pp.51-62
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    • 2016
  • Since the recent Hanok boom in Korea, Contemporary Hanok has been evolving in terms of structure, space, form, etc. To get a comprehensive understanding of the diversified Contemporary Hanok, this paper aims at its type classification by analyzing architects' designs since 2000. The criteria for the classification are two: (1) renovation [Re] or new construction [New]; and (2) degree of Contemporary Hanok's deviation from the traditional Hanok's standard - maintaining the traditional form [Main]; changing space within the traditional form [Space]; changing the traditional frame [Frame]; and juxtaposing the traditional and the modern [Combi]. From the two criteria, this paper deduced eight types of Contemporary Hanok, named respectively: Re-Main, New-Main, Re-Space, New-Space, Re-Frame, New-Frame, Re-Combi, and New-Combi, and studied their cases. It can be argued that various aspects of Contemporary Hanok and their critical meanings were well-investigated through this type classification and case-studies.

Re-organization of Parametric epidermis (파라메트릭 표피 재 조직화)

  • Park, Jeong-Joo
    • Proceedings of the Korean Institute of Interior Design Conference
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    • pp.46-49
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    • 2008
  • This research does Complexity form, Interior epidermis cell re-organization, Object discovery that have correct numerical value concept by purpose. Research applied by Grid re-organization in form generation, Parameter variation of cell unit (morphor, tweener), Symbol, pattern of variation, self-organization cell substitution order. Representation through 3d digital modeler of polygon, Nurbs and street-sheet program(x,y,z coordinates & Network way of points) etc. of main work. Investigator specified numbers of U profiles*30, V point-20 that is 600 Paramaters individual in volume, and define circle radius of lighting in object, Projection size variously and tried difference. Transposition cell to point and Heightened brightness of color using pointillism of painting. Led lighting cell object is expressed being decoded by digital code.

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The Effect of Hyperparameter Choice on ReLU and SELU Activation Function

  • Kevin, Pratama;Kang, Dae-Ki
    • International journal of advanced smart convergence
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    • v.6 no.4
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    • pp.73-79
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    • 2017
  • The Convolutional Neural Network (CNN) has shown an excellent performance in computer vision task. Applications of CNN include image classification, object detection in images, autonomous driving, etc. This paper will evaluate the performance of CNN model with ReLU and SELU as activation function. The evaluation will be performed on four different choices of hyperparameter which are initialization method, network configuration, optimization technique, and regularization. We did experiment on each choice of hyperparameter and show how it influences the network convergence and test accuracy. In this experiment, we also discover performance improvement when using SELU as activation function over ReLU.

Recent Development of Bulk High-Tc Superconductors

  • Yoo, Sang-Im
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.88-95
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    • 2002
  • Recent development in the field of RE-Ba-Cu-O (REBCO, RE: Y or rare earth elements) bulk high-Tc superconductors (HTS) is reviewed in the present paper. After the fatal weak link problem of sintered REBCO superconductors has been overcome by melt processing, this field has been greatly advanced during last ten years. The critical current density $J_c$ at 77 K has been enhanced by introducing effective flux pinning sites into the $REBa_2Cu_3O_y$ (RE123) superconducting matrix. Large melt-textured REBCO bulk crystals have been fabricated with the TSMG(top-seeded melt growth) technique. Mechanical properties of REBCO bulks have been improved by using the Ag additive or epoxy resin. Real bulk applications such as current lead, fault current limiter, flywheel energy storage system, magnetic field source, magnetic separation system, and etc., surely come true near future.

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