• 유통과학연구
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• 제17권9호
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• pp.57-66
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• 2019

Purpose - This study aimed at investigating the process of inducing the effect of green self-expressive motive and the fit between green premium and product on consumer's intent to purchase the bundle product with the green premium. Research design, data, and methodology - The questionnaire for on-line survey built at Google Forms was spread out via popular social media sites. 243 responses from the on-line survey were used for testing the hypotheses. Structural equation model of Amos 21.0 was used to verify hypotheses. Results and Conclusions - Green self-expressive motive positively influenced on not only the perceived value for green premium but also attitude toward the bundle. However, the fit between green premium and product had positive impact only on the perceived value for green premium. The perceived value was proved to positively influence on the attitude toward the bundle, which in turn increased the purchase intention, even with the positive effects of the product attitude as covariate on the intention. Therefore, marketers should choose target customers who have high level of green self-expressive motive and feel the fit, and pay attention to the green premium to help the customers perceive more values for the green premium. They should develop green premium product for conducting marketing effectively.

• The Journal of Asian Finance, Economics and Business
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• 제7권10호
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• pp.95-107
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• 2020

This study analyzes the effect of corporate social responsibility (CSR) activity on investors' heterogeneous beliefs. The hypothesis of this study is based on the conflicting effects of CSR activities on firm value and earning's quality. Investors' heterogeneous beliefs used in the empirical analysis of this study are trading volume, and CSR activity is measured by the KEJI Index (Korea Economic Justice Institute Index). This study performs an empirical analysis using regression analysis including control variables. CSR activities are found to have a positive relationship with trading volume. This is consistent regardless of the low and high accounting information (earning's quality). It can be interpreted that Korea's CSR activity acts as an incentive to increase investors' heterogeneous beliefs about target companies. In other words, it implies that the investor judges CSR activities negatively when evaluating firm value. This study could have a policy implication in that it analyzes how CSR activities affect investors' decision-making. In other words, this study analyzed CSR activities from the perspective of shareholders. Therefore, this study is expected to provide useful information for policymaking by regulatory agencies. In particular, its contribution is to presents data that CSR activities can be a negative factor in evaluating firm values.

• Geomechanics and Engineering
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• 제34권1호
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• pp.29-41
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• 2023

The 3D geospatial modeling of geotechnical information can aid in understanding the geotechnical characteristic values of the continuous subsurface at construction sites. In this study, a geostatistical optimization model for the three-dimensional (3D) mapping of subsurface stratification and the SPT-N value based on a trial-and-error rule was developed and applied to a dam emergency spillway site in South Korea. Geospatial database development for a geotechnical investigation, reconstitution of the target grid volume, and detection of outliers in the borehole dataset were implemented prior to the 3D modeling. For the site-specific subsurface stratification of the engineering geo-layer, we developed an integration method for the borehole and geophysical survey datasets based on the geostatistical optimization procedure of ordinary kriging and sequential Gaussian simulation (SGS) by comparing their cross-validation-based prediction residuals. We also developed an optimization technique based on SGS for estimating the 3D geometry of the SPT-N value. This method involves quantitatively testing the reliability of SGS and selecting the realizations with a high estimation accuracy. Boring tests were performed for validation, and the proposed method yielded more accurate prediction results and reproduced the spatial distribution of geotechnical information more effectively than the conventional geostatistical approach.

• Nuclear Engineering and Technology
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• 제56권5호
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• pp.1553-1561
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• 2024

Nondestructive radiography using cosmic ray muons has been used for decades to monitor nuclear reactor and spent nuclear fuel storage. Because nuclear fuel assemblies are highly dense and large, typical radiation probes such as x-rays cannot penetrate these target imaging objects. Although cosmic ray muons are highly penetrative for nuclear fuels as a result of their relatively high energy, the wide application of muon tomography is limited because of naturally low cosmic ray muon flux. This work presents a new image reconstruction algorithm to maximize the utility of cosmic ray muon in tomography applications. Muon momentum information is used to improve imaging resolution, as well as muon scattering angle. In this work, a new convolution was introduced known as M-value, which is a mathematical integration of two measured quantities: scattering angle and momentum. It captures the objects' quantity and density in a way that is easy to use with image reconstruction algorithms. The results demonstrate how to reconstruct images when muon momentum measurements are included in a typical muon scattering tomography algorithm. Using M-value improves muon tomography image resolution by replacing the scattering angle value without increasing computation costs. This new algorithm is projected to be a standard nondestructive radiography technique for spent nuclear fuel and nuclear material management.

• 대한원격탐사학회지
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• 제28권2호
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• pp.181-189
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• 2012

최근 수질추정을 위한 고해상도 위성영상의 활용 가능성에 대한 관심이 증대되고 있다. 그러나 고해상도 위성영상에서의 수면지역의 낮은 SNR(Signal to Noise Ratio)과 밝기값 비선형성과 같은 방사학적 오차는 수질추정 정확도를 감소시키는 원인이 된다. 이에 따라 위성영상을 이용한 정확한 수질추정을 위해서는 방사학적 보정이 반드시 수행되어져야 하나 KOMPSAT-2 위성영상의 경우 밝기값과 입사광량간 변환관계식이 제공되지 않기 때문에 이러한 방사학적 보정에 어려움이 존재한다. 따라서 수질모니터링에 KOMPSAT-2 영상을 활용하기 위해서는 밝기값 비선형성과 내륙 수면지역의 잡음현상을 실험적으로 파악할 필요가 있다. 본 논문에서는 충분한 검보정을 통해 선형성이 보장되고 있는 IKONOS와 GeoEye-1 영상을 기준영상으로 사용하여 동일시기에 동일지역을 촬영한 KOMPSAT-2 영상과의 밝기값 상호비교를 수행하였다. 상호비교 결과, 기준영상에 비해 KOMPSAT-2 영상의 잡음은 다소 높게 나타나나 밝기값의 경향 및 잡음의 크고 작은 패턴은 정확하게 일치하였고 KOMPSAT-2 영상 내 잡음의 영향이 최소화되는 적절한 영역의 크기는 $5{\times}5$로 나타났다. 또한 모든 실험 영상에서 밝기값의 비선형성은 존재하지 않는 것으로 확인되었다. 실험결과는 KOMPSAT-2 영상이 클로로필 농도와 같은 수질인자 추정을 위해 사용될 수 있는 가능성을 보여준다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.807-809
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• 2009

압전성을 갖는 산화아연 박막을 스퍼터링을 이용하여 실리콘 기판위에 증착하였고 여러 증착 공정변수들이 물성에 미치는 영향과 박막의 구조적 특성 및 전파경계조건을 고찰하였다. 특히, 평탄한 표면을 갖는 압전 박막을 제조하여 전파 특성에 우수한 증착조건을 제시하고 탄성표면파의 전파및 경계조건을 분석한다. 박막의 구조적 특성 분석을 위하여 여러가지 증착조건 중 아르곤과 산소의 가스비율 과 기판온도가 박막의 제조에 미치는 특성을 분석하였다. 스퍼터링 가스인 산소양이 50%이상으로 증가할수록 박막의 표면 거칠기가 나빠지는 특성을 보였다. 비저항과 표면형상은 유입되는 산소에 큰 영향을 받는다는 것을 알 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제24권2호
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• pp.162-172
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• 2011

In this paper, simulation was used to determine accuracies of genomic breeding values for polygenic traits associated with many thousands of markers obtained from high density genome scans. The statistical approach was based upon stochastically simulating a pedigree with a specified base population and a specified set of population parameters including the effective and noneffective marker distances and generation time. For this population, marker and quantitative trait locus (QTL) genotypes were generated using either a single linkage group or multiple linkage group model. Single nucleotide polymorphism (SNP) was simulated for an entire bovine genome (except for the sex chromosome, n = 29) including linkage and recombination. Individuals drawn from the simulated population with specified marker and QTL genotypes were randomly mated to establish appropriate levels of linkage disequilibrium for ten generations. Phenotype and genomic SNP data sets were obtained from individuals starting after two generations. Genetic prediction was accomplished by statistically modeling the genomic relationship matrix and standard BLUP methods. The effect of the number of linkage groups was also investigated to determine its influence on the accuracy of breeding values for genomic selection. When using high density scan data (0.08 cM marker distance), accuracies of breeding values on juveniles were obtained of 0.60 and 0.82, for a low heritable trait (0.10) and high heritable trait (0.50), respectively, in the single linkage group model. Estimates of 0.38 and 0.60 were obtained for the same cases in the multiple linkage group models. Unexpectedly, use of BLUP regression methods across many chromosomes was found to give rise to reduced accuracy in breeding value determination. The reasons for this remain a target for further research, but the role of Mendelian sampling may play a fundamental role in producing this effect.

• 한국광학회지
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• 제33권6호
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• pp.295-302
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• 2022

FHD급 고해상도 연성 내시경을 설계하기 위한 wedge prism 적용 방법을 연구하였다. 기존의 연성 내시경 광학계의 경우, 넓은 피사계 심도 범위에서 동일한 결상 성능을 얻기 위해 F 넘버를 크게 가져가거나 액체 렌즈를 적용하였다. 하지만 이는 추가적인 light guide와 기구물을 필요로 하여 광학계의 직경이 커진다는 문제점이 있다. 이를 해결하기 위해, 연성 내시경 광학계에 2매의 wedge prism을 적용하여 각 물체거리별로 상거리를 조절하였다. 먼저 설계한 내시경 광학계에 2매의 wedge prism을 대칭으로 배치하고, 각 물체거리별로 목표 결상 성능을 만족하는 상거리 값을 도출하였다. 그 다음, 상거리를 조절하기 위한 wedge prism 디센터 값을 도출하였다. 이 두 가지 데이터를 조합하여, 각 물체거리에서 목표 결상 성능을 만족하는 wedge prism 디센터 값을 다중구성으로 적용하였다. Wedge prism을 적용한 최적 설계 결과, 100 mm-7 mm의 전체 피사계 심도 범위에서, 분해능 178 cycles/mm에 대한 변조전달함수 20% 이상의 목표 결상 성능을 만족하였다.

• 복식
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• 제54권3호
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• pp.53-64
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• 2004

The study was done to provide domestic fashion multi-shops with basic information about the product and price strategies through an investigation the marketing strategies for domestic multi-shop dealt with imported product only. Data were collected from Interview with a buyer or a staff of marketing department of Domestic Fashion Multi-shop dealt with Imported Product only. Through the study, it was clarified that these multi-shops showed a tendency to compose of promising brands. brands set a high value on unique character or technique, and brands of promising designer noticed at the main collection. And they also extended their lines as a total life style shop dealt with accessory. shoes and home collection as well as clothing. Therefore, they had to analyze their target consumer's life style and applied this to organization of product, brands or sizing. To maintain the balance of multi-shop they bought products keeping the balance between all the brands and didn't lose variety of concept, it was demanded to develop new brands as well. Their distribution channels had to be planned by regional characteristic that could be accepted their target consumers.

• 대한전자공학회논문지TC
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• 제48권9호
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• pp.59-64
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• 2011

초광대역 레이더는 높은 분해 능력으로 인해 단거리 차량용 레이더로 주목받고 있다. 차량으로부터 반사된 레이더 신호는 "clutter"라는 원하지 않는 반사 신호를 갖게 되어, 목표물을 검출하는데 어려움을 갖게 된다. 그러므로 목표물에서 반사된 신호로부터 보다 확실하게 검출하기 위하여 레이더 검출기를 개발할 필요가 있다. 본 논문에서는 log-normal clutter 환경에서 다양한 평균과 분산에서 최적인 검출기를 구하였다. 비동기 방식의 검출기로 자승 검출기와 선형 검출기, 로그 검출기 등을 분석하였다. 본 논문에서는 컴퓨터 시뮬레이션을 통해 검출기의 성능을 분석하여, 차량용 레이더로 최적인 검출기를 구하였다.