• Title/Summary/Keyword: envelopes

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A Comparative Study on the Thermal Performance Changes by the Insulating Construction Types of Exterior Walls in Residential Buildings (주거용(住居用) 건물(建物) 외벽(外壁)의 단열공법별(斷熱工法別) 열성능(熱性能) 변동(變動)에 관한 비교(比較) 연구(硏究))

  • Kim, Moon-Han;Cho, Kyun-Hyong;Kim, Kwang-Woo
    • Solar Energy
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    • v.8 no.1
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    • pp.22-32
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    • 1988

  • It is known that the energy consumption and indoor thermal comfort in residential buildings are affected by the thermal performance of building envelopes. The thermal performance of building envelopes varies with their design methods. In this study, the thermal performance changes by the insulating construction types of exterior walls were analyzed, 1) by varing the thickness of the insulation 2) by varing the location of the insulation 3) by varing the location of the plane airspace The analyzed results are presented and the thermal performance evaluating factors were compared and discussed.

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An evaluation of the seismic response of symmetric steel space buildings

  • Yon, Burak
    • Steel and Composite Structures
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    • v.20 no.2
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    • pp.399-412
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    • 2016

  • This paper evaluates the seismic response of three dimensional steel space buildings using the spread plastic hinge approach. A numerical study was carried out in which a sample steel space building was selected for pushover analysis and incremental nonlinear dynamic time history analysis. For the nonlinear analysis, three earthquake acceleration records were selected to ensure compatibility with the design spectrum defined in the Turkish Earthquake Code. The interstorey drift, capacity curve, maximum responses and dynamic pushover curves of the building were obtained. The analysis results were compared and good correlation was obtained between the idealized dynamic analyses envelopes with and static pushover curves for the selected building. As a result to more accurately account response of steel buildings, dynamic pushover envelopes can be obtained and compared with static pushover curve of the building.

  • https://doi.org/10.12989/scs.2016.20.2.399 인용 KSCI

High-Reliable Classification of Multiple Induction Motor Faults Using Vibration Signatures based on an EM Algorithm (EM 알고리즘 기반 강인한 진동 특징을 이용한 고 신뢰성 유도 전동기 다중 결함 분류)

  • Jang, Won-Chul;Kang, Myeongsu;Choi, Byeong-Keun;Kim, Jong-Myon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2013.10a
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    • pp.346-353
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    • 2013

  • Industrial processes need to be monitored in real-time based on the input-output data observed during their operation. Abnormalities in an induction motor should be detected early in order to avoid costly breakdowns. To early identify induction motor faults, this paper effectively estimates spectral envelopes of each induction motor fault by utilizing a linear prediction coding (LPC) analysis technique and an expectation maximization (EM) algorithm. Moreover, this paper classifies induction motor faults into their corresponding categories by calculating Mahalanobis distance using the estimated spectral envelopes and finding the minimum distance. Experimental results shows that the proposed approach yields higher classification accuracies than the state-of-the-art approach for both noiseless and noisy environments for identifying the induction motor faults.

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Ultrastructure of the fertilized egg envelopes in Ancistrus cirrhosus, Loricariidae, Teleostei

  • Dong Heui Kim
    • Applied Microscopy
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    • v.50
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    • pp.13.1-13.7
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    • 2020

  • We examined the morphology of fertilized egg and ultrastructures of fertilized egg envelopes of Ancistrus cirrhosus belong to Loricariidae using light and electron microscopes. The fertilized eggs formed a mass on the spawning place and were yellowish, spherical, non-transparent, demersal, adhesive, and a narrow perivitelline space. But, the adhesiveness of fertilized eggs was disappeared after spawning excluding contact parts. The micropyle with funnel shape was surrounded by 15-19 furrow lines of egg envelope in a spoke-like pattern. The outer surface of egg envelope has smooth side and inner surface of egg envelope was rough with grooves. Also, the total thickness of the fertilized egg envelope was about 32.58 ± 0.85 ㎛ (n = 20), and the fertilized egg envelope consisted of three layers, an outer adhesive electron-dense layer, a middle layer with low electron density and an inner electron-dense layer with grooves in counter structure from other most teleost. Collectively, these morphological characteristics and adhesive property of fertilized egg, and ultrastructures of micropyle, outer surface, and section of fertilized egg envelope are showed species specificity.

  • https://doi.org/10.1186/s42649-020-00034-7 인용 PDF KSCI