유형론적 관점에서 살펴본 한-태 관계절 특성 대조 연구

김진후 국제한국언어문화학회 2017 국제한국언어문화학회 학술대회 Vol.2017 No.06

비고결 퇴적물에서 다운홀 탄성파 탐사, MASW, SCPT로 구한 횡파 속도 단면과 시추결과 비교 연구

김진후,김현도 한국지구과학회 2004 韓國地球科學會誌 Vol.25 No.4

Multi-channel Analysis of Surface Waves (MASW) and Seismic Cone Penetration Test (SCPT) have been recently developed to obtain S-wave velocity profiles which were conventionally investigated by a down-hole seismic survey. For unconsolidated sedimentary sites, we studied these three methods, and compared the results with a drilling log. All the methods showed that the changes in the S-wave velocities were consistent with the changes in the sedimentary facies. In addition, the SCPT was most sensitive to changes in sedimentary facies among the three profiles. The results of the SCPT showed that there exists a low velocity zone, which is mainly composed of clayey sand, at the depth of 8~12 m in the sediments.

합성 탄성파 자료에 대한 디콘볼류션 적용에 관한 연구

김진후,김현도 東亞大學校 海洋資源硏究所 2003 硏究論文集 Vol.15 No.-

One of the main techniques for data processing of a high resolution shallow seismic survey is the deconvolution. By using deconvolution technique, compression of the basic wavelet and removal of multiples can be achieved. In this study it can be concluded that the details of the formation structure can be obtained through applying predict error deconvolution to a synthetic seismogram. In applying deconvolution determination of the operator length and predict lag is critical, and the output resolution relies on them. It is also concluded that when the predict lag is short, compression of the basic wavelet is anticipated, and when the predict lag is long, multiples can be decayed,

Functionalized Nanoporous Films by Block Copolymer Self-Assembly

김진후,엄은식,임현철,김승현 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.1

2파장 방식 White OLED 소자 구조 설계 및 색좌표 안정화

김진후,권혁용,이상문,박이순 한국고분자학회 2009 한국고분자학회 학술대회 연구논문 초록집 Vol.2009 No.4

Ranking Hotels under Customer Risk Aversion:Application of the Stochastic Dominance Theory

김진후,이충훈,이슬기 (사)한국관광레저학회 2016 관광레저연구 Vol.28 No.6

Today, guests rely heavily on online sources to obtain information about hotels. In line with the trend, websites have started to offer rankings of hotels based on mean scores of customer reviews. However, mean-based comparisons may lead to misleading results when customers are risk-averse, and literature suggests that service consumers generally prefer lower uncertainty. Meanwhile, accommodating risk aversion in comparing preferences is not straightforward, while the widely used mean-variance criterion fails to detect some obvious choices. As an alternative, this study proposes application of the stochastic dominance theory to ranking of hotels and conduct a simulation experiment to illustrate its discriminant power. Furthermore, the stochastic dominance tests are applied to hotel rating data collected from Tripadvisor to demonstrate future applicability. Results suggest that stochastic dominance tests outperform t-tests in both pairwise discriminant power and in obtaining unique ranks among the sample hotels.

스파커 음원을 이용한 고해상 다중채널 해양 탄성파탐사

김진후,김현도 東亞大學校 海洋資源硏究所 2006 硏究論文集 Vol.18 No.-

A sparker source with the center frequency of 1㎑ or higher can not be easily applied for the multi-channel marine seismic survey because of stacking difficulties. Thus, it has been applied mainly to the single channel marine seismic survey. For examining the applicability of sparker source to multi-channel marine seismic survey, 8-channel seismic data were obtained from the field and processed, and a 2-D seismic section was drawn up. From this study it can be concluded that, a sparker source with the center frequency of 1㎑ or higher can be applied to the multi-channel marine seismic survey, and the seismic section with high vertical resolution can be generated. The high-resolution seismic section would be very useful for subsurface geological structure analysis in the shallow sea.

시추공 탄성파탐사에 의한 지층의 전단계수 산출

김진후,정성교 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.1

건설 예정부지에 대한 시추공 횡파 하향탐사를 실시하여 얻은 자료에 대한 역산을 수행하여 지층의 횡파속도와 전단계수 프로파일을 구했다. 시추공 횡파 하향탐사는 평판 측면타격에 의한 신호 발생원과 시추공 내에 설치한 3성분 수진기로 수행되었으며, S/N비를 높이기 위하여 3회에 걸쳐 신호를 종합(stacking)하였다. 탐사자료의 역산은 Marquart 알고리즘을 사용하였으며, 산출된 인장에 대한 분산(variance), 분해능 매트릭스(resolution matrix) 및 상관관계 매트릭스(correlation matrix)를 구하여 해석 결과에 대한 분석을 시도하였다. 인자 분석을 통해 볼 때 역산을 통해 얻은 결과는 유일해로 추정되며, 대상지역의 횡파속도는 0.41~0.98㎞/sec 범위이다. 횡파속도와 밀도를 이용해 얻은 지반의 전단계수는 0.34~2.28GPa 범위로 산출되었으며, 대상지역 중앙 하부지층에 심한 파쇄대의 존재 가능성을 보이고 있다. The downhole shear-wave survey data were collected at the construction site, and the shear-wave velocity and shear modulus profiles were obtained through the inversion of the data. In the downhole shear-wave survey shear-waves were generated by plate striking, and the signal, which was stacked 3 times, was detected by 3-component geophone installed in tile borehole. The Marquart algorithm was used for inversion process, in which variances, resolution matrix, and correlation matrix were calculated for analyzing qualify of parameters determined. The analysis of parameter determination indicates that the parameters obtained are the unique solutions, and the shear-wave velocities are in the range of 0.41∼0.98km/sec. The shear modulus obtained from shear-wave velocity and density profile was 0.34∼ 2.28GPa, and the shear modulus of the lower strata in the central part of the study area indicates that a fracture zone may be developed in this site.

해양탄성파탐사를 이용한 천해저 지층 분석

김진후,박경원,김현도 동아대학교 해양자원연구소 2000 硏究論文集 Vol.13 No.1

A marine seismic exploration with the 400Hz bubble pulser 1200 system was carried out The seismic survey was conducted along the 5 survey lines(total length of 4km), and the aim of this survey was to profile depth of sediment layer and bedrock with SINCDAS(Single Channel Data Acquisition System) developed by this study. The field data is displayed with variabel-density method and compared with borehole log to confirm accuracy of seismic data interpretation. The subsurface structure consists of the upper clay layer and the lower silt-clay layer. But the bedrock depth is not found because of extremely shallow survey depth and multiple reflections.

굴절 토모그래피를 이용한 터널부지 지반조사

김진후,김현도 동아대학교 해양자원연구소 2000 硏究論文集 Vol.13 No.1

Determining the depth and geometry of a sub-surface structure is a difficult task, especially in the steep and rugged mountain where even a drilling machine cannot be carried and installed on it. Potential field methods generally lack the necessary depth resolution, and seismic reflection data are much influenced by complex geometry of the structure. To address this problem, we have applied a surface 2-D tomographic refraction scheme that is based on an inversion method that incorporates appropriate damping and smoothing constraints. This scheme has been applied to a first-arrival traveltime data set collected over a tunnel route. Seismic data were collected along 10 profiles, and each profile consists of 5 shots and 24 receivers. Reliability of the resultant velocity tomograms were estimated on the basis of (1) plots of the difference between synthetic and observed traveltime (traveltime residual analysis), and (2) RMS errors with diverse input models. The sub-surface structure can be grouped in 2 layers, i.e. soil/weathered rock and basement. The thickness of the near-surface natural soil/weathered rock layer varied between 0 and 10 m, with occasional thickening to 30m. The depth to the basement could be traced to 9~11 m. Several low velocity zones which are developed in vertically have been found along the profiles. The low velocity zones are considered as weak and fracture zones, so that appropriate supporting methods must be considered when planning and great attentions must be paid during tunneling.