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Disaster and Safety Map Services Using Real Time Big Data Analysis

  • Lim, Jongtae;Kim, Yeonwoo;Kim, Byounghoon;Ko, Geonsik;Choi, Minwoong;Kim, Gihoon;Yoo, Seunghun;Song, Heesub;Bok, Kyoungsoo;Hayashida, Yukuo;Yoo, Jaesoo
    • Proceedings of the Korea Contents Association Conference
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    • 2016.05a
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    • pp.257-258
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    • 2016
  • In my paper, an evaluation method on naturalness and urbanness characterizations of animation image is proposed. In contrast to the prior works, we intend to give the exact degree of naturalness and urbanness by combining the low-level visual feature-based schemes with the biological visual schemes. In our method, four descriptors are extracted and pseudoinverse is adopted. By this method, we can experiment on the exact degree of naturalness and urbanness with satisfactory results.

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Comparison of the Earth Resistivity Measured by the 3-Electrode and 4-Electrode Fall-of-Potential Methods (3전극과 4전극 전위강하법으로 측정한 대지저항률의 비교)

  • Lee, Bok-Hee;Kim, Ki-Bok
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.27 no.2
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    • pp.95-101
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    • 2013
  • This paper presents the comparison of the earth resistivity obtained from the measurements made with the three-electrode and four-electrode fall-of-potential techniques. The ${\rho}-a$ curve obtained from Wenner four-electrode method in undisturbed earth is in good agreement with the ${\rho}-l$ curve obtained from the three-electrode method based on the fall-of- potential method. However, The ${\rho}-a$ curve in disturbed earth with moisture and freezing is significantly different with the ${\rho}-l$ curve. The ${\rho}-a$ curve is considerably sensitive to the freezing and the moisture present in the earth surface compared to the ${\rho}-l$ curve. Thus to determine the actual earth resistivity, it is necessary to take into account the earth surface conditions when measuring the earth resistivity.

Analysis of GPGPU Performance by dedicating L2 Cache for Texture Data (텍스쳐 데이터를 위한 2차 캐쉬 구조를 가지는 그래픽 처리 장치의 성능 분석)

  • Kim, Gwang Bok;Kim, Cheol Hong
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2017.01a
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    • pp.143-144
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    • 2017
  • 최근 그래픽 처리 장치는 DRAM에 대한 접근을 줄이고자 여러 메모리 계층을 사용하고 있다. GPGPU의 L2 캐쉬는 요청 데이터의 타입에 따라 별도로 접근하는 L1 메모리와 다르게 레이턴시가 긴 DRAM에 접근하기 전에 모든 데이터 타입이 접근 가능한 캐쉬이다. 본 논문에서는 애플리케이션에서 명시하는 다양한 데이터 타입에 대하여 접근 및 적재를 허용하는 L2 캐쉬를 오직 텍스쳐 데이터만을 허용하도록 하여 변화하는 성능을 분석하고자 한다. 본 실험을 위해 텍스쳐 데이터 이외의 데이터 타입은 L2 캐쉬를 바이패스하여 바로 DRAM에 접근하도록 구조를 변경한다. 실험을 통한 분석 결과 텍스쳐 데이터만을 허용하는 경우 대부분의 벤치마크에서 성능 감소가 발생하여 기존 구조대비 평균 5.58% 감소율을 확인하였다. 반대로, 본 논문의 실험 환경에서의 L2 캐쉬의 적중률이 낮은 애플리케이션인 needle은 불필요한 L2 접근을 바이패스 함으로써 전체적인 성능 증가를 이끌어낸 것으로 분석된다.

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Interspecific Hybridization between Fagopyrum esculentum and F. homotropicum without ovule culture I. Crossability of Korean landraces and foreign varieties with F. homotropicum (배주배양 없이 재배메밀(Fagopyrum esculentum)과 자식성 야생메밀(F. homotropicum)의 종간잡종 육성 I. 한국재래종 및 외국품종의 F. homotropicum과의 교잡친화성)

  • Park Cheol-Ho;Kim Yeon-Bok;Choi Su-Yong;Lee Sang-Yong;Heo Kwon;Shim Young-Boum;Chung Chan-Sun
    • Proceedings of the Korean Society of Crop Science Conference
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    • 1999.05a
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    • pp.174-175
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    • 1999
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Design of HDD Load/Unload Suspension Using Shape Memory Alloy (형상기억합금을 이용한 HDD Load/Unload 서스펜션의 설계)

  • Lim, Soo-Cheol;Park, Young-Pil;Park, No-Cheol;Choi, Seung-Bok
    • Transactions of the Society of Information Storage Systems
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    • v.2 no.1
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    • pp.71-78
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    • 2006
  • In this work, we propose a new type of HDD Load/Unload(L/UL) suspension featuring shape memory alloy(SMA). The mechanical and thermal properties of the SMA film with respect to the material phase states are experimentally estimated and the SMA film is carefully integrated to the suspension. In order to obtain the desirable dynamic characteristics of the suspension during L/UL process, the design parameters of the SMA film such as geometric properties are determined by considering the vibration modes of the suspension related to the L/UL performance. After analyzing the modal characteristics of the proposed suspension, L/UL performance is evaluated through L/UL simulation by observing the vibration motion and minimum flying height of the slider during L/UL process.

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Characteristics of Water Quality in Wangsong Reservoir and Its Inflow Streams (왕송저수지 및 유입하천의 수질특성에 관한 연구)

  • Cho, Deok-Hee;Lee, Kyong-Hee;Han, Song-Hee;Song, Jin-Ho;Kwon, Sang-Jo;Kim, Bok-Jun;Lee, Ki-Jong;Lee, Jeong-Bok
    • Journal of Korean Society of Water and Wastewater
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    • v.26 no.2
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    • pp.201-208
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    • 2012
  • Wangsong Reservoir needs a systematic approach that can control water purity and water quality improvement. This study was carried out to assess the seasonal variation of water quality and the effect of pollutant being loaded from watershed in a sallow eutrophic reservoir(Wangsong Reservoir) from March to November, 2011. Wangsong Reservoir, located in Uiwang City, has the capacity of 2 million $m^{3}$ in irrigation water supply with the drainage of 4.2 $km^{2}$. Average concentrations of BOD, COD, T-N, T-P, and Chloropyll-a in Wangsong Reservoir were 5.8 mg/L, 9.7 mg/L, 4.299 mg/L, 0.106 mg/L and 73.1 mg/$m^{3}$, respectively. In the inflow streams and treated sewage of Wangsong Reservoir, the T-N concentrations of 4.114 - 14.619 mg/L were higher than those in the Reservoir and the other pollutants were lower. As a result of investigation, Wangsong Reservoir exceeded the agricultural water standard level due to algal growth and accumulation from the upper streams and sewage. In order to achieve the targeted water quality in Wangsong Reservoir, it is required to be decreased in pollutants of internal and inflow streams.

CONTINUITY OF THE ORBITAL AND LIMIT SET MAPS IN GENERAL DYNAMICAL SYSTEMS

  • Lee, Kyung-Bok;Park, Jong-Suh
    • Communications of the Korean Mathematical Society
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    • v.26 no.4
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    • pp.649-660
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    • 2011
  • S. M. Saperstone and M. Nishihama [6] had showed both continuity and stability of the orbital and limit set maps, K(x) and L(x), where K and L are considered as maps from X to $2^X$. The main purpose of this paper is to extend continuity and stability for dynamical systems to general dynamical systems.