• Title, Summary, Keyword: Spectrum characteristics

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Characteristics of Response Spectrum using Observed Ground Motion from the Recent Earthquakes (내진설계를 위한 응답스펙트럼 연구)

  • Kim, Jun-Kyoung
    • Proceedings of the KSEEG Conference
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    • pp.116-119
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    • 1999
  • Amplification factor spectrum, using the observed strong ground motions database in the Korean Peninsula, has been obtained and compared with Standard Response Spectrum, which was suggested by United States Nuclear Regulatory Committee. The observed und motions from the Yongwol and the Kyoungju, and the other recent Earthquakes, respectively, which ate supposed to represent domestic seismotectonic characteristics such as seismic source, attenuation of the propagation medium, and site specific effect, are used for the analysis of amplification factor spectrum. The database are slightly different from the those of the second study. Amplification factors hue been calculated by comparing the observed peak ground motions with results from responses to the observed horizontal na vertical ground motions. The comparison have shown that the amplification factors resultant from this study exceeds these of Standard Response Spectrum, The results suggest that the characteristics of seismic strong ground motion, which are supposed to represent the domestic seismotectonic characteristics, differs from those of Standard Response Spectrum, especially at higher frequencies. The results from the 2nd study are similar to those of 1st analysis.

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Analysis of Amplication Factor of Response Spectrum using Strong Ground Motions Compatible to the Domestic Seismotectonic Characteristics (유사 강지진동을 이용한 지반응답의 Amplication Factor 스펙트럼 분석)

  • 김준경
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.88-93
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    • 1997
  • Amplication factor spectrum has been obtained and compared with standard Response Spectrum using the observed strong ground motions database. The observed ground motions from the Miramichi, Nahanni, Saguenay and New Madrid Earthquake (vertical component 19. horizontal component 36). which are estimated to represent domestic seismotectonic characteristics such as seismic source, attenuation, and site effect, are used for the analysis of amplication factor spectrum. Amplication factor has been calculated using both observed peak values and results from responses to the observed horizontal and vertical ground motions. The comparison shows that the amplication factors resultant from this study exceeds those of Standard Response Spectrum at relatively higher frequencies. The results implie that the characteristics of the seismic strong ground motion which may represent the domestic seismotectonic characteristics differs from those of Standard Response Spectrum, which are resultant from the strong ground motions observed mainly at the westem United States.

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Characteristics of Spectrum using Observed Ground Motion from the Yongwol and the Kyoungju Earthquakes(II) (영월 및 경주지진 파형의 주파수 분석(II))

  • 김준경
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.57-60
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    • 1999
  • Amplification factor spectrum using the observed strong ground motions database in the Korean Peninsula has been obtained and compared with Standard Rpectrum which wa suggested by United States Nuclear Regulatory Committee. The observed ground motions from the Yongwol and the Kyoungju Earthquakes respectively which are supposed to represent domestic seismotectonic characteristics such as seismic source attenuation of the propagation meium and site specific effect are used for the analysis of amplification factor spectrum,. The database are slightly different from the those of the second study. Amplification factors have been calculated by comparing the observed peak ground motions with results from responses to the observed horizontal na vertical ground motions. The comparison have shown that the amplification factors resultant from this study exceeds those of Standard Response Spectrum The results suggest that the characteristics of seismic strong ground motion which are supposed to represent the domestic seismotectonic characteristics differs from those of Standard Response Spectrum especially at higher frequencies. The results from the 2nd study are similar to those of 1st analysis.

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Characteristics of Spectrum using Observed Ground Motions from the Yongwol and the KyoungJu Earthquakes (영월 및 경주지진 파형의 주파수 분석)

  • 김준경
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.407-412
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    • 1998
  • Amplification factor spectrum, using the observed strong ground motions database, has been obtained and compared with Standard Response Spectrum, which were suggested by US NRC. The observed ground motions from the Yongwol and the Kyoungju Earthquake, respectively, which are suppose to represent domestic seismotectonic characteristics such as seismic source, attenuation, and site effect, are used for the analysis of amplification factor spectrum. Amplification factors have been calculated by comparing the observed peak ground motions with results from responses to the observed horizontal and vertical ground motions. The comparison shows that the amplification factors resultant from this study exceeds those of Standard Response Spectum at relatively higher frequencies. The results suggest that the characteristics of the seismic strong ground motion, which are supposed to represent the domestic seismotectonic characteristics, differs from those of Standard Response Spectrum, especially at hither frequencies

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Analysis of Amplification Factor Spectrum Using Strong Ground Motions Compatible to the Domestic Seismotectonic Characteristics (유사 강지진동을 이용한 수평 및 수직지반응답의 Amplification Factor 스펙트럼 분석)

  • 김준경;박창업;조봉곤;지헌철
    • Journal of the Earthquake Engineering Society of Korea
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    • v.1 no.1
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    • pp.25-29
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    • 1997
  • Amplication factor spectrum, using the observed strong ground motions database, has been obtained and compared with Standard Response Spectrum. The observed ground motions from the Miramichi, Nohanni, Sagueray and New Madrid Earthquake (19 vertical components, 36 horizontal components), which are estimated to represent domestic seismotectonic characteristics such as seismic sources, attenuation, and site effect, are used for the analysis of amplification factor spectrum. Amplication factors have been calculated by comparing the observed peak ground motions with results form responses to the observed horizontal and vertical ground motions. The comparison shows that the amplification factors resultant from this study exceed those of Standard Response Spectrum of relatively higher frequencies. The result implles that the characteristics of the seismic strong ground motion, which may represent the domestic seismotectonic characteristics differ from of standard Response Spectrum, especillay of higher frequencies.

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The Name spectrum of domestic menswear brands (국내 남성복 브랜드의 네임스펙트럼)

  • Kwon, Hae-Sook
    • Journal of Fashion Business
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    • v.15 no.1
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    • pp.92-102
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    • 2011
  • The purpose of this research is to study the types of name spectrum and their characteristics of domestic men's wear brands focusing on formal and casual wear and also examine the differences based on the type of brands' product and brand style. Total 184 of men's wear brands, which were consisted of 66 formal wear brands and 84 casual wear brands, were selected from '2009 Korea Fashion Yearbook'. For data analysis, quantitatively evaluated the frequency and qualitatively evaluated the image of brand product and the meaning of brand name. The result as follows; 1. The domestic fashion brands for men's wear appeared to have four types of name spectrum. The descriptive name was the most frequently showed, and followed by arbitrary, suggestive, and coined name. For formal wear brands, four types of name spectrum were appeared in the order of descriptive, suggestive, coined, and arbitrary name. In casual wear brands, three types of name spectrum were appeared in the order of descriptive, arbitrary, and suggestive name. 2. The characteristics of men's brand name according to their name spectrum was as follows.; In the descriptive brand names, person's name was used the most and some ascribed the characteristics, feature or geographic location of the product. The suggestive brand names contained images and symbols of the product and also implied the relevant benefit information in a particular product context. In the arbitrary brand name, they imply the various meanings according to the product and are made up of either coined or natural. For the coined name, some bear the ideology or symbolized the characteristics of product itself. 3. The descriptive name spectrum showed the most in domestic menswear brands, regardless of the brand type. Except this, there were differences in the type and the frequency of name spectrum depending on the brand type.

Brain activity analysis by using chaotic characteristics (카오스 특성에 의한 뇌의 활동도 분석)

  • 김택수;김현술;박상희
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1844-1847
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    • 1997
  • Assuming that EEG(electroencephalogram), which is generated by a nonlinear electrical of billions of neurons in the brain, has chaotic characteristics, it is confirmend by frequency spectrum analysis, log frequency spectrum analysis, correlation dimension analysis and Lyapunov exponents analysis. Some chaotic characteristics are related to the degree of brain activity. The slope of log frequency spectrum increases and the correlation dimension decreasess with respect to the activities, while the largest Lyapunov exponent has only a rough correlation.

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Influence of Phase Angle Characteristics to Energy Input of Earthquake Ground Motions (지진동의 입력에너지에 대한 위상각 차이의 영향)

  • Woo, Woon-Taek;Park, Tae-Won;Jung, Ran
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.243-249
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    • 2003
  • The characteristics of harmonic phase angles and phase angle differences contained in earthquake ground motions such as El Centre 1530 NS, Taftl 1952 NS, Hachinohe 1968 NS and Mexico 1985 are figured, which have been mostly overlooked in contrast with the importance placed on harmonic amplitudes. And, energy input spectrum of structures excited by such an earthquake motion is expressed with smoothed Fourier amplitude spectrum. In dynamic response analysis, there must be earthquake ground accelerations which contain the phase angle, the phase angle difference and energy input spectrum characteristics of the zone considered to be constructed building structures. To make clear the importance of phase angle differences, 4-earthquake ground motions are normalized by 200 gal and energy input spectrum characteristics of normalized 4-earthquake ground motions are compared.

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A Study on the Chamical and Physical Characteristics of Ultrasonic-Energy-Added Diesel Fuel (초음파 에너지 부가 지젤연료의 화학적, 물리적 특성에 관한 연구)

  • 최두석;윤면근;류정인
    • Transactions of the Korean Society of Automotive Engineers
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    • v.4 no.3
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    • pp.147-155
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    • 1996
  • This study investigated the characteristics of ultrasonic-energy-added diesel fuel. We compared the characteristics used H-NMR spectrum, FT-IR spectrum, viscosity and surface tension between conventional diesel fuel and ultrasonic-energy-added diesel fuel. The result are obtained as follow : We knew that ultrasonic energy result to reduce BI and weaken viscosity and surface tension. Also, the ultrasonic energy caused to reduce aromatics Ha and increase Alkanes Hγ. The effect of ultrasonic-energy-added dieselfuel was principally caused by change of chemical structures and a physical characteristics.

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Study on Freak Wave Characteristics and Approximation of Wave Spectrum in Uljin Sea Area (울진해역의 Freak wave 특성과 스펙트럼 근사에 대한 연구)

  • Ryu, Hwang-Jin;Hong, Sa-Young
    • Journal of Ocean Engineering and Technology
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    • v.26 no.2
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    • pp.8-13
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    • 2012
  • This paper investigates the statistical properties of waves in the sea area of Uljin, which is located in the East Sea area of Korea. The wave data were measured using AWAC (Acoustic Wave and Current Meter), which was installed at a 16-m water depth from November 2010 to March 2011. The wave data acquisition rate, Hmax, monthly mean Hs, Tz, Tp, and wave direction are summarized. The distributions of Hs and Tz were analyzed using the Hs-Tz scatter diagrams. The measurement wave data were analyzed to investigate freak wave characteristics. By comparing the wave spectrum using the measurement wave data with the wave spectrum obtained by varying the JONSWAP wave spectrum, it was possible to approximate the wave spectrum shape at the Uljin Sea area.