• Title/Summary/Keyword: passive form

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A Cultural Product Design Development of Korean Image by the Use of Fabric Materials (섬유소재를 이용한 한국적 이미지의 문화상품 디자인개발)

  • 오현정;오선희
    • Journal of the Korean Society of Clothing and Textiles
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    • v.28 no.11
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    • pp.1353-1360
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    • 2004
  • The purpose of this study is to develop a cultural products design of korean image using fabrics. The study is carry out in literature research methods and make sample product. We examine existing researches about cultural product design development to understand developed items, materials, and design directions. The brainstorming method and the established literature researches were used to obtain the design components of Korean image. A cultural products design was developed into the decorative structural details. The results can be summarized as follows: Korean image is pure, passive, gentle, small, and lasting life-force at weeds and wild flowers. Korean form is rounded curve and soft silhouette as streamy, not exaggerate. Korean color is not a finishing treatment, non-dyed natural color, or pastel, light greyish, and dull tone. Korean textile is a natural materials as linen, ramie, and coarse silk. Final sample products are table supplies, home goods and bed goods applying the sewing method of tuck, quilting, top-stitching, patch work, applique and embroidery.

Physical Layer Security in Underlay CCRNs with Fixed Transmit Power

  • Wang, Songqing;Xu, Xiaoming;Yang, Weiwei
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.1
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    • pp.260-279
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    • 2015
  • In this paper, we investigate physical layer security for multiple decode-and-forward (DF) relaying underlay cognitive radio networks (CRNs) with fixed transmit power at the secondary network against passive eavesdropping attacks. We propose a simple relay selection scheme to improve wireless transmission security based on the instantaneous channel information of all legitimate users and the statistical information about the eavesdropper channels. The closed-form expressions of the probability of non-zero secrecy capacity and the secrecy outage probability (SOP) are derived over independent and non-identically distributed Rayleigh fading environments. Furthermore, we conduct the asymptotic analysis to evaluate the secrecy diversity order performance and prove that full diversity is achieved by using the proposed relay selection. Finally, numerical results are presented to verify the theoretical analysis and depict that primary interference constrain has a significant impact on the secure performance and a proper transmit power for the second transmitters is preferred to be energy-efficient and improve the secure performance.

Effect of Acid Fog on Rust Formation and Fatigue Behavior of Weathering Steel Used in Un-Coated Bridge (무도장 교량에 사용되는 내후성강재의 부식 및 피로거동에 미치는 산성안개의 영향)

  • Kim, Min-Gun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.32 no.1
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    • pp.13-20
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    • 2008
  • The purpose of this study is to investigate the effect of acid fog on the rust formation behavior of weathering steel (SMA50) which is used in un-coated bridges. Weathering steel didn't form the passive film under the environment of acid fog(pH5,6), whereas the environment of distilled water formed the protective oxide film. Therefore, the construction of weathering steel under the environment extremely exposed to SOx and NOx which are the main compositions of acid fog is not adequate. Fatigue limits of weathering steel under acid fog environment are remarkably decreased as compared with environment of distilled water. The corrosive constituents in acid fog has piled up the corrosion products on specimen surface and generated the corrosion pits. Because of the high stress concentration arising at this corrosion pit, relatively low fatigue limits were obtained for acid fog specimens.

Fabrication of Switch Module for ATM Exchange System using MCM Technology (멀티칩 기술을 이용한 ATM 교환기용 Switch 모듈 제작)

  • Ju, Cheol-Won;Kim, Chang-Hun;Han, Byeong-Seong
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.49 no.8
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    • pp.433-437
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    • 2000
  • We fabricated switch module of ATM(Asynchronous Transfer Mode) exchange system with MCM-C(MultiChip Module Co-fired) technology and measured its electrical characteristics. Green tape was used as substrate and Au/Ag paste was used to form the interconnect layers. The via holes were made by drill and filled with metal paste usign screen method. After manufacturing the substrate, chips and passive components were assembled on the substrate. In electrical test, the module showed the output signal of 46.9MHz synchronized with input signal. In the view of substrate size reduction, the area of MCM switch module was 35% of conventional hybrid switch module.

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The Analysis of Body Absence of Clothes based on Deconstruction (해체적 사고에 근거한 신체 부재의 의상작품 분석)

  • Park Hyun-Shin
    • Journal of Science of Art and Design
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    • v.2
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    • pp.90-127
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    • 2000
  • The Paper aims to survey and analyze the meaning 'Absence of body' from clothes as non-verbal communication medium. Two types of absence of body from clothes are clothes as object because of removing body, and flattened colthes to deny the body form. In results of analysis, 1)the confrontation of male/female was represented by positive/negative, active/passive, present/absent. 2) male/female means social/private, body/clothing, relevant/irrelevant, subjective/additive. 3) one/numbers, simple/various, limited/free present the various way of waering. 4) tradition/contemporary is expressed by materials 5) enlarged clothes expresses the cynical attitude about body 6) inside/outside , one dress/layered dress suggest new concept to wear against traditional way of wearing.

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A study on the effect of the external electric type corrosion resistance for the bolt connection in weathering steel box girders. (무도장 내후성 강교량의 Box Girder 내부볼트 연결부에 대한 외부전원식 정기방식효과에 관한 연구)

  • Park Yong-Gul;Kim Hun-Tae;Baek Chan Ho;Choi Jung Youl
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.988-993
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    • 2004
  • This paper considers corrosion problems in the bolt connection of weathering steel box girder bridge using the external electric type corrosion resistance method which resisted to local corrosion in coated steel surface with contacted air. The weathering steel was created a rust itself in the passive state. but a coated box girder type was easily dew form could be made galvanic cell that accelerated corrosion. so that it was ruled by protection coat with some paint. Therefore, it needed that can be applied the external electric type corrosion resistance method in coated surface. As a result of the test of polarization amount had measured that the weathering steel was higher currents than the general steel by about 5\~10%. Therefore. an external electric type corrosion resistance method can be used to protect local corrosion in the coated bolt connection of weathering steel box girders effectively.

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10 Gbit/s Timing recovery circuit using temperature compensated dielectric resonantor filter (온도보상된 유전체공진기 필터를 이용한 10Gbit/s 클럭추출회로)

  • 송재호;유태환;박문수
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.33A no.4
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    • pp.78-83
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    • 1996
  • A timing recovery circuit of 10 Gbit/s optical receiver is described. The circuit consists of a passive NRZ-to-PRZ circuit, a dielectric resonator filter (DRF) and a narrow band amplifier, which for the first time adopted a temperature compensation technique using the tempareature characteristics of DR. The experimental results showed an output clock phase variation of less than ±6 degree over the operating temperature range form 0C to 75C and measured maximum rms jitters of less than 2 phs with the resonance detunings of up to ±10 MHz. These experimental results show that the circuit is a suitable for 10 Gbit/s lightwave transmission system.

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Research of Energy Efficiency for Power Plant Performance Improvement (발전성능 향상을 위한 에너지 효율 연구)

  • Lee, Jae-Keun;Moon, Jeon-Soo
    • Journal of Hydrogen and New Energy
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    • v.21 no.3
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    • pp.220-226
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    • 2010
  • The heat transfer performance improvement in closed cooling water system of an electric power generation can be achieved by a corrosion control using corrosion inhibitors. The effect of trisodium phosphate and sodium nitrite upon carbon steel at various Cl1 ion containing water concentrations was examined by an integrated corrosion monitoring system. Nitrite was found to be the most effective inhibitor among tested inhibitors for carbon steel. The inhibiting process is considered as adsorption of nitrite ions in oxide layer which form a passive film on the carbon steel surface.

Development of Non-Contacting Automatic Inspection Technology of Precise Parts (정밀부품의 비접촉 자동검사기술 개발)

  • Lee, Woo-Sung;Han, Sung-Hyun
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.16 no.6
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    • pp.110-116
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    • 2007
  • This paper presents a new technique to implement the real-time recognition for shapes and model number of parts based on an active vision approach. The main focus of this paper is to apply a technique of 3D object recognition for non-contacting inspection of the shape and the external form state of precision parts based on the pattern recognition. In the field of computer vision, there have been many kinds of object recognition approaches. And most of these approaches focus on a method of recognition using a given input image (passive vision). It is, however, hard to recognize an object from model objects that have similar aspects each other. Recently, it has been perceived that an active vision is one of hopeful approaches to realize a robust object recognition system. The performance is illustrated by experiment for several parts and models.

Identification of Flexion Withdrawal Reflex Using Linear Model in Spinal Cord Injury

  • Kim Yong-Chul;Youm Youn-Gil
    • Journal of Mechanical Science and Technology
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    • v.20 no.8
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    • pp.1183-1194
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    • 2006
  • The aim of this study was to identify the characteristics of the flexion withdrawal reflex modulated by the hip angle and hip movement in spinal cord injury (SCI). The influence of the hip position and passive movement were tested in 6 subjects with chronic SCI. Each subject placed in a supine position and lower leg was fixed with the knee at 5 -45 degree flexion and the ankle at 25-40 degree plantar flexion. A train of 10 stimulus pulses were applied at 200 Hz to the skin of the medial arch to trigger flexion reflexes. From results of the regression analysis, static properties of normalized muscle activation of flexor muscles have the linear relationship with respect to hip angle (P< 0.05). In order to verify the neural contribution of flexion reflex, we compared the static and dynamic gains of estimated muscle activations with measured EMG of ankle flexor muscle. Form this study, we postulate that the torque and muscle response of flexion withdrawal reflex have linear relationship with hip angle and angular velocity.