• Title/Summary/Keyword: Survey Research Method

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Validation of a new magnetometric survey for mapping 3D subsurface leakage paths

  • Park, DongSoon;Jessop, Mike L.
    • Geosciences Journal
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    • v.22 no.6
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    • pp.891-902
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    • 2018
  • Techniques for more reliable detection of 3D subsurface flow paths are highly important for most water-related geotechnical projects. In this case study, a magnetometric resistivity method with a new approach and state-of-the-art technology ("Willowstick survey") was applied to the testbed dam (YD dam) site, and its applicability was validated by geotechnical investigation techniques including borehole drilling and sampling, Lugeon test, flow direction and velocity test, and seismic tomography. In addition to the magnetometric survey, a 3D electrical resistivity survey was performed independently and the results were compared and discussed. The electrical resistivity survey was effective in detecting groundwater levels, but it was limited in mapping leakage paths. On the other hand, the Willowstick magnetometric survey effectively detected geologic weaknesses (e.g., fault fracture) and potential leakage paths of the dam site foundation rocks. The results of this research are expected to be effective for water infrastructures where leakage is an important issue.

Study on the Importance of Rural Hanok and Rural Landscaping - Focused on Experts Opinion Analysis- (농촌경관에 있어서 한옥의 가치에 관한 연구 -전문가 의견분석을 중심으로-)

  • Shin, Jae-Sun;Nam, Hae-Kyeong
    • Journal of the Korean Institute of Rural Architecture
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    • v.21 no.3
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    • pp.1-8
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    • 2019
  • This study uses expert analysis as a method of research to identify the value of hanok in rural landscapes. To do so, the study conducted the Delphi method and the AHP survey twice. First, the Delphi method was used on experts who have either studied rural landscape, regional development, hanok or have adequate knowledge in such areas, concerning the definiton of sustainable rural landscapes, the role of hanok in rural landscapes, the problems rural hanoks face, and the preservation and utilzation of rural hanok. Based on this, the AHP survey was conducted. The survey results showed that sustainable rural landscapes are 'landscapes in which the transformation proces coexists from traditonal to modern times.' The role of the rural hanok was shown to be 'the forming of landscapes that expres the historical flow of the vilage.' In the subsequent survey of rural landscapes, the order of import limitationance of hanok was regionality, historicity, harmoniousnes, eco-friendlines and familarity. However, a may be that this study is based on expert opinion which may not be regarded as universal. Therefore, future research on the basis of this study wil have to be conducted in a way to identify the value of hanok in rural landscapes from the perspective of various groups.

Study of Potential Future Occupations in the Environmental Industry - Focusing on Delphi Survey - (환경산업의 유망직업 추출에 관한 연구 - 델파이 조사를 중심으로 -)

  • Han, Sang-Geun;Park Jong-Sung;Kim, Na-Ra
    • Hwankyungkyoyuk
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    • v.17 no.1
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    • pp.154-169
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    • 2004
  • This research presents an analysis of some of the occupations associated with Korea‘s national strategic industries. Therefore, the objectives of this paper can be summarized as follows: By classifying existing occupations and identifying potential future ones, this paper will strive to present a systematic analysis of environmental related occupations. In order to achieve the objectives of this research, related literature was examined, a Delphi Survey was conducted. In order to select potential future occupations, this research used a qualitative method that involved interviews with specialists. More specifically, a Delphi Survey was used to collect the specialists' opinions. The potential occupations were selected using a three-prong procedure involving an analysis of related literature and materials, a Delphi Survey, as well the holding of conferences with specialists and visits to those in the actual field. Through this process, 33 different potential future occupations were selected.

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A New Method for Leveling Airborne Gamma-ray Spectrometric Data (항공 방사능 탐사 자료 맞추기의 새로운 방법)

  • Park, Yeong-Sue;Rim, Hyoungrea;Lim, Mutaek;Shin, Young Hong
    • Geophysics and Geophysical Exploration
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    • v.19 no.4
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    • pp.179-186
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    • 2016
  • Data leveling utilizing baseline survey makes existing old data be smoothly compiled, and also keep characteristics of data, such as small high frequency anomaly information. The previously proposed leveling method may easily loose or damage the original characteristics of the data. This paper suggests a new leveling method. New method determines the leveling coefficients using regional field of the original data, which is composed by data on the grids point coincided with baseline survey grid, while existing method uses all grid data without any considerations. Results of new leveling method on test area shows that new method make two data sets compiled more smoothly and trends of data distribution expressed more clearly. And then, it also preserves high frequency information well.

Occupant Characteristics Analysis based on Integrative IEQ Weighting Factor in Residential Buildings - Based on Occupant Survey of Residential Building in Chungbuk Province (주거건물에서의 통합 실내환경평가 가중치 분석을 통한 거주자 특성분석 - 충북지역 주거건물 거주자 설문조사를 바탕으로)

  • Yoon, Sung-Hoon;Yun, Hee-Jin
    • KIEAE Journal
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    • v.16 no.5
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    • pp.87-92
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    • 2016
  • Purpose: The objective of this research is to investigate and analyze the relationship between physical residential conditions and occupants' responses in apartment buildings by POE(Post-Occupancy Evaluation). The analysis results from this research will help to identify the indoor residential problems and find design solutions for improving overall residential indoor residential environment. Method: The occupant survey was conducted at four different apartment complex area at Cheongju City, Chungbuk Province, Korea. Combination of unbalanced indoor environmental conditions in residential building had difference of occupants' responses according to occupants' characteristics, such as gender, age, and so on. The survey collected data regarding the occupants' EQ(Environmental Quality) priorities to determine the weight of each environmental-quality factor (lighting, acoustic, thermal and indoor air quality). A paired comparison method was used to determine the weight by comparing the relative importance of the two factors based on occupant's survey response. Result: The output from this research is useful to understand the residential environment, occupants' satisfaction, preference, and identifies the current residential problems and finds an architectural solution in apartment buildings.

Integrative Approach for Improving Washing Machines (I) - Survey and Diary Method - (국산 세탁기의 경쟁력 강화를 위한 세탁 실태조사 및 실험 연구(I) -설문지와 일기법 조사-)

  • Yu, Hye-Gyeong;O, Gyeong-Hwa;Jo, Yong-Jin
    • Journal of the Korean Society of Clothing and Textiles
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    • v.20 no.5
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    • pp.893-904
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    • 1996
  • The main purpose of this research was to examine the purchase and use behavior of consumers related to washing machines in order to develope strategies to increase competitiveness of washing machines manufactured in Korea. Purchase and use behavior related to washing machines were examined by survey method and detailed information on washing conditions and usage of washing machines were obtained by diary method. 398 questionnaires were analyzed in the survey and 35 housewives participated in keeping the records of their washings for 30 days. The results of the survey showed that price and a tangle of clothes were the most determinant factors for purchase of washing machines and the knowledge related to washing was relatively low The diary method revealed that washing loads and frequencies of washing increase with the household size, and functions of washing machines except water level are infrequently used. Comparisons between the survey and diary results indicated that consistency between the two methods depends on the types of questions.

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The Method on Safety and Maintenance Based Domestic Infrastructure Facilities for Survey of Actual Condition (안전 및 유지관리기반 국내 인프라 실태조사 수행 방안)

  • Lee, Jeong-Seok
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.230-231
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    • 2015
  • Recently, although researching and developing of safety and maintenance on domestic infrastructure facilities in KOREA are important, there has been very little research regarding on a comprehensive and integrated survey of actual condition. Therefore this study asserts the necessity of the survey process of actual condition by period planning(short-term, middle-term, long-term). The purpose of this study is to investigate current situation and to suggest the whole process method, and to establish survey process of actual condition on domestic infrastructure facilities.

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An Exploration on Random Sampling Telephone Survey -The Case of the Ulsan Mayoral Election in 2002- (임의표집법에 의거한 전화조사의 시도 -2002년 울산시장선거의 경우-)

  • No, Kyu-Hyung;Khang, Hung-Soo;Han, Cheol-Soo
    • Survey Research
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    • v.3 no.2
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    • pp.77-90
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    • 2002
  • This study reports the results of a random sampling telephone survey conducted in the case of the Ulsan mayoral election 2002. We interview at least five times to a respondent who is randomly selected by means of the birthday method from a randomly sampled telephone number list of 1,233 households, We analyze the result of interviewing, such as absence and promise. And we compare the demographic variables of the surveyed sample and those of the population and we also compare the randomly selected sample's voting preference with outcome of the election in various ways. Finally, we discuss difficulty of random sampling with the birthday method and suggest some technical tips to conduct random sampling telephone survey.

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A Survey of Actual State of Treatment with Acupuncture and Moxibustion in Korea (한국 침구 치료 현황 파악을 위한 설문조사)

  • Han, Chang-Hyun;Shin, Sun-Wha;Ahn, Sang-Woo;Choi, Sun-Mi
    • Journal of Acupuncture Research
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    • v.22 no.6
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    • pp.141-153
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    • 2005
  • Objectives : This survey was accomplished to find out how Korean medical doctors take acupuncture treatment in real clinics. Methods : The survey questions were developed by the consensus from the professors who major in acupuncture and moxibustion. The questionnaire was given the 2731 Korean medical doctors at the mending education site; In addition, it was given to 793 doctors working at the 105 Korean medical hospitals listed on the National Korean Medical Hospital Associations Address book by postal mail; and also it was given to the 142 public health care Korean medical doctors who attended the conference for the municipal and provincial representatives of the public health service Korean medical doctors. Total of 1277 questionnaires were retrieved out of the 3666 subjects. Results : 1. Nine hundred out of 1277 Korean medical doctors used method of differentiation syndromes(70.4%) and 1184 out of 1277 Korean medical doctors convalescence decide with subjective symptom improvement of patient(92.6%). 2. Nine hundred eight out of 1277 Korean medical doctors used both local and remote points(71.0%) and 916 out of 1277 Korean medical doctors treat with method of reinforcement-reduction(71.7%). 3. Eleven hundred fifth five out of 1277 Korean medical doctors used cupping a boil(90.3%) and 1023 out of 1277 Korean medical doctors used moxibustion(80.1%). Conclusion : When Korean medical doctors treat with acupuncture, most of them diagnose with differentiation methods and meridian theory, decide convalescence with subjective symptom improvement of patient, select out of both local and remote acupuncture points, treat with method of basic reinforcement-reduction, apply moxa and cupping a boil when they are necessary. The cupping a boil comes to be used when being muscle and joint disease. The moxa comes to be used when being chronic disease.

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A Comparative Analysis of Field and Slide Survey on Subjective Image of the Nightscape (야경의 주관적 이미지에 관한 현지평가와 슬라이드평가의 비교분석)

  • Ahn, Hyun Tae;Moon, Ki Hoon;Kim, Jeong Tai
    • KIEAE Journal
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    • v.7 no.2
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    • pp.31-37
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    • 2007
  • Despite of many supportive research to the usefulness of slide evaluation on environment of outdoor lighting, study method of using slides have provoked many discussions of its manifestation of reality of field conditions. This study aims to compare the results of slide survey with that of field survey. Distant view and short range view of nightscape of Seoul were selected. Field measurement of luminance and chromaticity were conducted and questionnaire survey were conducted. Frequency analysis, T-test, factor analysis were conducted. Results shows that distant view and short range view of field survey have better visual atmosphere than slide survey. In addition, slide survey on distant view shows lowest values. Difference between field survey and slide survey on distant view is much bigger than the results of short range view.