• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권10호
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• pp.2514-2526
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• 2013

This paper presents a detection method for least significant bit matching revisited (LSBMR) steganography. Previous research shows that the adjacent pixels of natural images are highly correlated and the value 0 appears most frequently in pixel difference. Considering that the message embedding process of LSBMR steganography has a weighted-smoothing effect on the distribution of pixel difference, the frequency of the occurrence of value 0 in pixel difference changes most significantly whereas other values approximately remain unchanged during message embedding. By analyzing the effect of LSBMR steganography on pixel difference distribution, an equation is deduced to estimate the frequency of difference value 0 using the frequencies of difference values 1 and 2. The sum of the ratio of the estimated value to the actual value as well as the ratio of the frequency of difference value 1 to difference value 0 is used as the steganalytic detector. Experimental results show that the proposed method can effectively detect LSBMR steganography and can outperform previous proposed methods.

• Journal of Information Technology Applications and Management
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• 제15권4호
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• pp.221-245
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• 2008

Recently, mobile internet technologies are enabling the possibility of radically new computing services which can share information and communicate with others on the move. In this situation, prior studies have attempted to identify of what factors make people use mobile internet. However, prior researches focused on investigating the factors affecting users' adoption to Mobile Internet. In order to offer beneficial materials to mobile internet companies, we investigated important factors to increase mobile users' value from the viewpoints of customer. In particular, this study was progressed how characteristics of mobile contents affect users' intrinsic attributes and how perceived users' network effects affect users' value in the mobile computing environments. To empirically test proposed hypotheses, we have analyzed 285 survey data gathering from mobile internet users and verified hypotheses by using SEM (structural equation modeling). Based on the results of this study, we found that content accessibility and content quality have significant impacts on users' intrinsic attributes such as perceived usefulness and perceived enjoyment. In addition, this study also revealed that perceived usefulness and perceived enjoyment were positively related to users' emotional value. Moreover, this study found that perceived users' network effects could affect users' monetary value by mediating expected benefits. Based on our findings, we can understand that this perspective can provide a deeper understanding of the mobile users' value adoption by bridging the gap between mobile internet studies and actual practice.

• 산업융합연구
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• 제13권2호
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• pp.25-37
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• 2015

The purpose of this study is about the influence of the Service quality on the customer loyalty depending on the customer value(social and psychological value, functional value) because of the dynamic business environment is react quickly and flexibly, many of today's companies are required to consult an expert. According to the circumstances, Service Firms(Hotel) should be provide a differentiated service for each customer. And this paper attempt to theoretical organize and take advantage of practical in Service industry. The questionaries of 154 from the companies which have received Service in 3 years in the metropolis and small and medium-sized cities were used to test hierarchical regression model with mediating effects of customer value between Service quality and Customer loyalty by SPSS(PASW) 18.0 version. From these analyses, the following results were obtained: First, social-psychological value have partially mediated effect on the tangibility, responsibility, assurance and customer loyalty. Second, functional value have partially mediated effects on the between tangibles, reliability and customer loyalty. The result suggests that 'tangibility', 'reliability', 'responsibility', 'assurance', 'empathy' are the most important factors to affect customer loyalty, and there are partially mediated effects of customer intention between Service quality and Customer loyalty. In conclusion, to improve the specific and actual meaning and value about the Hotel service quality and to give the suggestions on the Hotel's marketing communication by understanding the customer action.

• 유통과학연구
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• 제21권1호
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• pp.119-128
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• 2023

Purpose: Due to COVID-19, the rapidly changing untact culture from offline to online has spread rapidly, increasing the utilization of omni-channel. However, among the studies on consumers in the online market, there are not many studies that analyze Shopping Values and attitudes toward omnichannel Acceptance. Research design, data, and methodology: This study investigated through empirical analysis how Shopping Values and innovation propensity of consumers using omni channels affect omni channel Acceptance attitudes. The analysis results based on a total of 268 questionnaires using SPSS v.23 and AMOS v.23 statistical programs are as follows. Results: First, it was found that the perceived Value of omnichannel use had a positive effect on the innovation tendency, and the pleasure Value had a greater effect than the actual Value. Second, it was found that the practical and hedonic Value of the omnichannel had a positive effect on the attitude of service Acceptance. Third, it was found that Omni Channel's consumer innovation tendency had a positive effect on service Acceptance attitude. Conclusion: This study proved that Shopping Value perception and individual innovation propensity for omnichannel services have a positive effect on Acceptance attitude, and it is of academic significance in that it expanded understanding of what factors are needed to increase Acceptance attitude of Omni Channel services.

• 한국지반공학회지:지반
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• 제8권1호
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• pp.59-66
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• 1992

표준관입시험 결과인 N값은 여러가지 요소들에 영향을 받으며 그 중 함마의 낙하에너지는 가장 큰 영향을 주는 것으로 알려져 있다. 에너지 수준이 상이한 상태에서 측정한 N값을 표준값을 기준으로 한 일반적인 해석에 적용할 경우에는 기초의 안전을 위협하거나 과잉설계를 유발할 수 있다. 본 연구에서는 SPT 함마의 낙하속도를 측정 함으로써 함마의 낙하에너 지를 간접적으로 계산하였다. 분석 결과 우리나라의 N값은 국제적 인 표준 값으로 인정되는 Nu과는 차이가 있는 것으로 나타나 해석 또는 설계시 필수적으로 고려되어야 할 것으로 판단된다.

• Journal of the Korean Wood Science and Technology
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• 제19권2호
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• pp.40-55
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• 1991

To investigate the influence of cross section geometries on the behavior of composite beams in the case of small span to depth ratio and deep beams. the static flexural behavior of composite I-beams and Box- beams was evaluated. 12 types of composite I -beams composed of LVL flanges and particleboard or plywood web and 3 types of composite Box-beams composed of LVL flanges and plywood web were tested under one-point loading. The load-deflection curves were almost linear to failure, therefore, the behavior of tested composite beams was elastic. The theoretical flexural rigidity of composite beams was calculated and compared with observed flexural rigidity. The highest value was found in I-W type beams and the lowest value was found in G-P type beams. The difference between theoretical and observed flexural rigidity was small. Theoretical total deflection of tested composite beams was calculated using flexural rigidity and compared with actual deflection. Shear deflection of these beams was evaluated by the approximation method, solid crosss section method and elementary method. The difference between actual deflection and expected deflection was not found in D, E and F type beams. This defference was small in G, H and I type beams or Box-beam.

• 전자공학회논문지D
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• 제36D권6호
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• pp.13-20
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• 1999

일반적으로 널리 사용되는 인버터들은 주파수 의존적 특성을 갖는다. 본 논문에서는 인버터의 주파수의존성을 인버터의 자체(실수부)에 대한 주파수 의존성과 인버터 이미턴스(허수부)의 주파수 의존성으로 분류하고 인버터 이미턴스의 변화를 인버터로부터 분리하여 가상의 소자화하는 방법을 제시한다. 이를 이용하면 최적화의 과정 없이도 표준적인 설계법의 응용으로 원하는 여파기를 정확히 설계할 수 있다. 통상의 표준적인 설계법과 비교 설계한 결과, 본 논문의 방법을 사용하면 보다 정확한 여파기 설계값을 얻을 수 있음을 알수 있다.

• 한국생활과학회지
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• 제18권6호
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• pp.1363-1374
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• 2009

The purpose of this study was to determine the actual state of the indoor air quality in newly built or remodeled kindergartens by TVOC and HCHO concentration and teachers' responses. The field measurements on the levels of TVOC and HCHO were carried out in six classrooms of newly built or remodeled kindergartens before their opening. The interviews with teachers of subject kindergartens were carried out at the end of the first semester. The contents of the interviews were teachers' subjective responses and symptoms of the kindergarten pupils on the Sick New-School Syndrome. The results are as follows; the mean value of TVOC concentration in the classrooms of kindergartens ranged from 0.10ppm to 0.42ppm, which can theoretically exert a harmful influence on residents. The mean value of HCHO concentration ranged from 0.00ppm to 0.03ppm, which does not exceed the standard. The TVOC concentrations of the more ventilated kindergartens were lower than the others. Also, the classrooms with high concentrations of TVOC showed negative responses or symptoms in teachers and kindergarten pupils.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 총회 및 춘계학술발표회
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• pp.259-262
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• 2003

In the Republic of Korea, Ministry of Construction & Transportation and Korea Water Resources Corporation manage the national groundwater monitoring network at the 169 stations and will organize the supplementary groundwater monitoring network at the 10,000 stations by 2011 year. The method that organizes the monitoring network was developed using the Analytic Hierarchy Process with pairwise comparison. Several estimation factors for the estimating every district were selected to reflect each district conditions. Their weighting value was decided by pairwise comparison and questions to the experts about groundwater The optimal number of groundwater monitoring well was calculated through the developed method. To verify this method, groundwater was monitored in Jeonju city by way showing the example. The study area In Jeonju city needs 7 stations for the supplementary groundwater monitoring network. The results monitored in 7 stations inferred the groundwater level around the study area by Kriging. The mean of residual between inferred groundwater level value from Kriging and actual groundwater level is rather low. Furthermore, the mean and standard deviation of residual between inferred groundwater level change and actual groundwater change is much lower. The Fact that 7 monitoring stations are sufficient for observing the groundwater condition in the study area makes it possible for suggested monitoring number to be proper.

• 한국농공학회논문집
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• 제47권6호
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• pp.47-57
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• 2005

Stress distribution in soils is the very important element to design and to solve the problems of settlement, safety of foundations and trafficability of constructing vehicle in civil engineering. This research presents the comparative estimation of the actual and theoretical measurement on the underground stress of outer layer for each soil after the observation of each top soil layer fur its vertical and horizontal stresses in (1) homogeneous sand ground (2) weak stratum with the sand soil (3) weak stratum with gravel of the soil model, and it also investigates the effect of subsidence of ground by the repeated load. The underground stresses fumed out to be different in the value of theoretical and actual measurement after the trial examination of model. This study has the purpose of suggesting the better construction method of running equipment on weak stratum by comparing the estimated value of trial experiment and theory on underground stress of the weak ground surface area and of raising up the necessity of the continuous research hereafter.