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건설공사장 이동식 방음시설물의 음향특성 (Site Mitigation Plan for Noise Sources from Construction Sites by Developing Movable Noise Barriers)

  • 이성찬;정진연;임정빈
    • 한국소음진동공학회논문집
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    • 제25권1호
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    • pp.58-64
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    • 2015
  • There are a lot of different types of noise from construction site and it depends on construction stage, equipment type and number of operating equipments. The problem is that the almost noise from construction site is high level and some kinds of noise levels are over 100 dB. In addition, if construction site is located in downtown, there are a few options to reduce noise level. Therefore several site mitigation plans were developed to reduce different types of construction noises such as breaker work, gang form and asphalt saw. They were applied in site and evaluated noise reduction performance. The test result of site insertion loss was between 4~8 dB depends on the equipment and type of work.

Pass by Noise Test Site Variability

  • 김병삼
    • 한국공작기계학회논문집
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    • 제14권3호
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    • pp.116-121
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    • 2005
  • The objective of this paper is to compare the site-to-site variability of ISO 10844 pass by the noise test sites. In order to investigate the site-to-site variance of test surfaces, European commercial tires are tested at seven different test sites. Three Korea test sites and four Europe test sites are selected. The pass by noise test is done according to a 2001/43/EC regulation. Although the ISO surface has a very specific track composition, it does not reduce the variation of pass by noise measurements over the surface of test sites. This paper shows that the test results of pass by noise level are different depending on the test sites. The correlation obtained in this work is able to predict the pass by noise level for certain test site using the data measured from another test site. The prediction value is range with an error within 1dB(A).

生態的 環景復元設計에 關한 現象學的 考察 - 마틴 하이데거의 現象學을 中心으로 - (A Phenomenological Study on the Ecological Restoration Design of Human Environment)

  • 변찬우
    • 한국조경학회지
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    • 제25권3호
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    • pp.155-176
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    • 1997
  • Today most landscape architects and scientists have approached ecological restoration, only in a scientific way or on aesthetic way so as to deal with the complex phenomena of a site easily. However, 'the real world' as well as 'ecological nature' as it is can not be totally dealt by the scientific approach which is quantitative and reductioinal. ince a site to be restored has the character of 'place' where man 'dwells', it must be designed and built as total phenomenon. In terms of Martin Heidegger's interpretation of "revealing", we might find out how to overcome the dilemma of the 'modern technology'. To the point of the phenomenological integrity between 'modern technology' and 'art', we can reveal 'sense of place' on a site. The phenomenological approach, which is related to the characteristics of the site, implies something more than scientific since it focuses on the development of site-specific data without wasting extra data for ecological restoration. Bodily experiencing a site with the perception, man discloses the site's nature and he also analyzes it in a scientific way. Therefore the phenomenological approach might be a clue of constructing ecological restoration as well as construing the identity of landscape architecture.

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초등학교(初等學校) 교정(校庭)에서의 공간(空間) 배치(配置) 형태(形態)로 본 아동(兒童)의 공간활용(空間活用)에 관한 연구(硏究)-1 - 일본(日本)의 초등학교(初等學校) 옥외공간(屋外空間) 배치(配置)의 기본형(基本形)과 그 특성(特性) - (A Study on the Children's Space Use by Zoning Pattern in Elementary School Site - As a Case Study of Elementary School Site in Japan -)

  • 윤영삼;강병근
    • 교육시설
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    • 제11권6호
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    • pp.13-21
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    • 2004
  • The purpose of this study is to make planning factors for outdoor space in elementary school site, with analyzation focusing on a Japanese elementary school examples. We evaluated the planning factors which encourage the development of children’s behaviors from quality of space. And we can get the important points as planning factor for school site as follows: 1) The base point of zoning is school building, building entrance, entrance of site and track 2) The importance of linked space plan with inside of site and surrounding environment 3) Preservation linked system of space in school site for linked pattern of child’s behavior.

고객지향적 웹 사이트 개발 방법론의 현황과 평가 (Current Practices of the Customer-Oriented Web Site Development Methodologies and their Evaluation)

  • 이선로;김기영
    • Journal of Information Technology Applications and Management
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    • 제11권1호
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    • pp.15-37
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    • 2004
  • This study attempts to investigate the industrial practices of the web site development methodologies and their impacts on the web site development project performance. Most of Korean web site development firms currently use customized component-based development(CBD) methodologies that have been internally developed. The methodologies generally being accepted by web site developers, however, did not emerge yet. In addition, this study shows that indiscreet applications of various methodologies and techniques might cause negative impacts on the project performance since the web site development projects are also exposed to most of the risk factors identified in the traditional systems development.

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Estimation of Site Index for Larix kaempferi and Pinus koraiensis in Gangwon and North Gyeongsang Provinces

  • Lee, Daesung;Seo, Yeongwan;Park, Gildong;Choi, Jungkee
    • Journal of Forest and Environmental Science
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    • 제31권3호
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    • pp.202-206
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    • 2015
  • Site index curves were developed for Larix kaempferi and Pinus koraiensis in Gangwon and North Gyeongsang provinces in Korea. For the development of site index, Schumacher and Chapman-Richards model were applied using the data collected from 2012 to 2014. Base age was set to 40 years for Larix kaempferi and Pinus koraiensis in site index of this study. Coefficient of determination and root mean square error of site index models were provided by species, and the models were compared with the previous studies to check the suitability. Overall, site index models developed in this study fitted in the current data well. Thus, the site indexes are considered to be properly used in Gangwon and North Gyeongsang provinces.

Site Calibration for the Wind Turbine Performance Evaluation

  • Nam, Yoon-Su;Yoo, Neung-Soo;Lee, Jung-Wan
    • Journal of Mechanical Science and Technology
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    • 제18권12호
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    • pp.2250-2257
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    • 2004
  • The accurate wind speed information at the hub height of a wind turbine is very essential to the exact estimation of the wind turbine power performance testing. Several methods on the site calibration, which is a technique to estimate the wind speed at the wind turbine's hub height based on the measured wind data using a reference meteorological mast, are introduced. A site calibration result and the wind resource assessment for the TaeKwanRyung test site are presented using three-month wind data from a reference meteorological mast and the other mast temporarily installed at the site of wind turbine. Besides, an analysis on the uncertainty allocation for the wind speed correction using site calibration is performed.

A Mathematical model for web site service quality evaluation based on AHP and fuzzy methodology

  • 유의문;권영직
    • 한국산업정보학회논문지
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    • 제11권5호
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    • pp.119-131
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    • 2006
  • This paper proposes a mathematical model for web site service quality evaluation, which first applies analytic hierarchy process(AHP) to determine the weights of evaluation indexes of web site service quality and then analyzes web site service synthetically by means of fuzzy methodology. In this case, experts' knowledge cannot only be used but its subjective component can be eliminated. Hence, the web site service quality can be analyzed and evaluated more reasonably. After establishing this model, the experiment results will be given, which verify the feasibility and validity of the proposed model. The model proposed here is very simple and easy to implement and can provide a useful way to help developers evaluate their web site service quality efficiently.

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야회시험장의 시험장감쇠량 (Site Attenuations of an Open Area Test Site)

  • 김기채;정연춘;정정환;정낙삼
    • 대한전자공학회논문지
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    • 제27권9호
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    • pp.1336-1343
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    • 1990
  • In this paper the theoretical analysis of the site attenuation was made on the concept of mutual impedance of antennas and the cause of characteristic hump in the site attenuation curve below 80 MHz is explained. The deviation between the FCC site attenuatios and the experimental results of an ideal open area test site at low frequencies(below 80MHz) was found to be the mutual coupling effects of the antennas under the FCC's measurement conditions. It seems desirable that the site attenuations curve of FCC document be revicused to the theoretical curves presented in this paper is long as the FCC's measurement conditions are to the applied.

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텅스텐 결정면의 질소 흡착에 관한 연구 : I. (210)면 (Nitrogen Adsorption on the Stepped Planes of Tungsten: I.(210) Plane)

  • 최대선;한종훈;백선목;박노길;김기석;김기석;황정남
    • 한국진공학회지
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    • 제4권4호
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    • pp.358-366
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    • 1995
  • W(210)면의 질소 흡착에 의한 일함수의 변화, heat of desorption 및 흡착 site에 대하여 조사하였다. 텅스텐(210)면에 질소가 흡착될 때 흡착율에 따라 일함수는 증가하다가 최대 변화량 0.29eV에서 포화되었다. TDS결과로부터 이 면은 진소에 대하여 적어도 3개의 흡착 site가 있음을 알았고 high dose에서 흡착되는 $\beta$1 state까지 포함하면 모두 4개의 흡착 site 가 있으며 이 흡착 site들 중 $\alpha$1 state를 제외하고는 모두 일함수를 증가시키는 site임을 알았다. 질소는 W(210)면의 step((100)면)과 terrace((110)면)의 중 step에 흡착되고 독립된, 즉 무한히 큰 W(100)면의 $\alpha$1, $\alpha$2, 그리고 $\beta$2 state에 대응되는 흡착 site에 흡착된 질소의 dipole moment의 방향은 W(210)면의 step((100)면의 일부)의 $\alpha$1, $\alpha$2, 그리고 $\beta$2 state에 대응되는 흡착 site에 흡착된 질소의 dipole moment의 방향과 반대방향임을 알았다.

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