• 벤처창업연구
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• 제6권4호
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• pp.173-194
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• 2011

본 연구에서는 방송통신위원회에서 지속적으로 추진하고 있는 위치정확도 기준 고시와 관련하여 위치정확도 제고의 경제적 효과를 추정해 보았다. 분석에서는 기업관점의 매출증가효과 및 이를 포괄하는 사회적 관점의 가치창출을 분석하였으며, 산업연관분석을 활용하여 타 산업에의 파급효과까지도 분석을 하였다. 분석의 결과 상당한 수준의 경제적 가치가 확인되었으며, 기업 관점의 가치 대비 사회적 관점의 가치 수준이 매우 높게 나타났다. 이는 LBS가 공공 목적의 서비스 비중이 크며, 기업간, 소비자간 외부성이 큰 서비스라는 직관적 판단을 지지하는 것이며, 위치정확도 제고의 추진에 있어 정부가 적극적인 역할을 해야 함을 보여주는 것으로 해석될 수 있다. 또한, 개략적인 추산이나 위치정확도 제고의 편익-비용비율도 상당히 높은 수준으로 추정할 수 있었다. 이러한 분석을 통해 LBS 위치정확도 제고를 위한 정책의 필요성을 확인하였다.

• 대한기계학회논문집A
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• 제31권3호
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• pp.344-354
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• 2007

The objective of this study is to investigate the effect of arbitrarily located defect around the circular hole in the aircraft structural material such as Al/GFRP laminates and monolithic Al alloy sheet under cyclic bending moment. The fatigue behavior of these materials may be different due to the defect location. Material flaws in the from of pre-existing defects can severely affect the fatigue crack initiation and propagation behavior. The aim of this study is to evaluate effects of relative location of defects around the circular hole in monolithic Al alloy and Al/GFRP laminates under cyclic bending moment. The fatigue behavior i.e., the stress concentration factor($K_t$), the crack initiation life($N_i$), the relationship between crack length(a) and cycles(N), the relationship between crack growth rate(da/dN) and stress intensity factor range(${\Dalta}K$) near a circular hole are considered. Especially, the defects location at ${\theta}_1=0^{\circ}\;and\;{\theta}_2=30^{\circ}$ was strongly effective in stress concentration factor($K_t$) and crack initiation life($N_i$). The test results indicated the features of different fatigue crack propagation behavior and the different growing delamination shape according to each location of defect around the circular hole in Al/GFRP laminates.

• 복식문화연구
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• 제20권2호
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• pp.251-262
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• 2012

This research aimed to examine an advertising location according to consumer involvement about internet search advertising and advertising effect according to advertising forms. This research carried out a questionnaire survey from May 25, 2011 for seven days with the target of men and women at the age of 20s-30s who tried search advertising in Seoul and capital area, and 519 copies were used for final analysis. For analysis of collected materials, the reliability test, factor analysis, $t$-test, regression analysis and ${\chi}^2$ test were executed by using statistical package SPSS 16.0. The results are as follows. First, it appeared that consumer's clothing involvement, advertising involvement, advertising location and advertising forms had an influence on site attitude and clicking intention. Consumers of high clothing involvement, high advertising involvement and upper end advertising appeared to have high site attitude and clicking intention. Second, all consumers of the low and high clothing involvement and upper end advertising appeared to prefer the upper end advertising. It appeared that consumers of low advertising involvement prefer lower end advertising, and consumers of high advertising involvement prefer the upper end advertising at an advertising location according to clothing involvement. Accordingly, it is important that the search advertising exposes advertising in the upper end, and that should use an advertising phrase capable of giving trust to consumers. As the text advertising had high site attitude and clicking intention in the advertising forms, consumers should pay attention to the advertising phrase.

• 디지털융복합연구
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• 제17권2호
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• pp.453-462
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• 2019

본 연구는 스마트폰 이용자들을 대상으로 위치기반 SNS 서비스 관련 위험요소에 대한 통제성과 심각성, 비현실적 낙관주의 및 위험인식의 관계를 규명하고자 하였다. 이를 위해 위치기반 SNS 서비스 이용 경험이 있는 대학생을 대상으로 설문조사를 실시하였다. 주요 결과를 중심으로 논의하면 다음과 같다. 첫째, 통제성의 비현실적 낙관주의에 대한 검증력은 통계적으로 유의하였다. 둘째, 심각성의 비현실적 낙관주의에 대한 검증력은 통계적으로 유의하였다. 셋째, 통제성의 위험인식에 대한 검증력은 통계적으로 유의하지 않았다. 넷째, 심각성의 위험인식에 대한 검증력은 통계적으로 유의하지 않았다. 다섯째, 비현실적 낙관주의의 위험인식에 대한 검증력은 통계적으로 유의하였다. 본 연구의 결과는 스마트폰 사용자들의 위치기반 SNS 서비스 이용에 따른 프라이버시 침해 가능성에 대한 사전예방과 보호행위를 높이는데 기여할 것이다. 헌편, 향후 후속연구에서는 비현실적 낙관주의와 위험예방이나 대처행동의 관계를 살펴볼 필요가 있을 것이다.

• International Journal of Contents
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• 제13권1호
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• pp.22-30
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• 2017

The diffusion of advanced mobile technology has introduced new types of personal information or 'location data'. These new data mean new opportunities for businesses, such as location-based services (LBS), but have resulted in new consumer anxieties regarding disclosure of personal information. This study examines the effects of the consumers' perceived control over "time-andplace" information in location-aware services on their perceived privacy risk. A total of 270 respondents participated in this study. Conditions of perceived privacy control were operationalized over time-and-place information, in a $2{\times}2$ factorial design. Results indicate that the perceived control over time-and-place personal information is a significant predictor of perceived risk, and control assurances over time-and-place information enhances the perception of control, thus alleviating the perceived risk. In addition, the effect is much more significant when time and place were combined.

• 한국소음진동공학회논문집
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• 제14권11호
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• pp.1166-1175
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• 2004

People in the advanced society have deep interest in such environmental problems as noise, air quality, water pollution, etc. This paper submits the result of the research on the noise In the surroundings of the butane can explosion location. First, the noise level measured in a residential area, 245 meters' away from the butane can explosion location, was 59.3 dB. Also, the noise level measured in the IGUP (International Graduate University of Peace), 300 meters' away from the explosion site, was 52.5 dB. Second, the above noise levels are lower than the level specified In the Environmental Standard (65 dB), which represented that the experiment was safe. Third, the noise level in a place away from the butane can explosion location varied in accordance with the direction of the wind. Consequently, the noise in all locations (the places where damage to people is expected) surrounding the experimental butane can explosion location was measured to identify the effect of the wind irection.

• 대한전기학회논문지:전력기술부문A
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• 제53권3호
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• pp.168-174
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• 2004

This paper describes a new fault location algorithm based on the voltage equation at the relaying point using 6-phase current for untransposed 765㎸ parallel transmission lines. The proposed method uses the voltage and current collected at only the local end. By means of 3-phase circuit analysis theory to compensate the mutual coupling effects between parallel lines, the fault location is derived. The fault distance is determined by solving the 2nd distance equation based on KVL(Kirchhoff's Voltage Law). Extensive simulation results using EMTP(Electromagnatic Transients Program) have verified that the error of the fault location achieved is up to 4.56(%) in untransposed parallel transmission lines.

• Earthquakes and Structures
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• 제20권1호
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• pp.29-38
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• 2021

According to ACI 224.3R-95 (ACI, 2013), construction joints (cold joint) in the column are to be provided at the top of floor slab for column continuing to the next floor and underside of floor slab and beam. A recent study reveals that providing cold joint of the mentioned location significantly reduced the seismic performance of the frame structures. Since, the construction joints in multi-story frame structures normally provided at the top of the floor slabs and at soffit of the beam in the column. This study investigated the effect of construction joint at various location in the column of beam-column joint such as at the top of floor slab, soffit level of the beam, half the depth of beam below the soffit of the beam and at a full depth of the beam below the soffit of the beam. The study revealed that there is an improvement in seismic capacity of the specimens as the location of cold joint is placed away from the soffit of the beam for lower story column.

• 한국가스학회지
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• 제10권3호
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• pp.27-33
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• 2006

본 논문에서는 가스 파이프라인 내의 누출 현상이 파이프라인 출구 압력 변화에 미치는 영향을 분석하였다. 경사진 지형적 영향을 고려하기 위하여, 보정된 Weymouth 식이 본 연구에서 사용되었다. 누출 영향을 분석하기 위하여, 수평관, 상향 및 하향 경사관 각각에서 누출 현상이 없을 경우와 누출 현상이 발생할 경우에 대하여 출구 압력과 입구 압력에 대한 출구 압력 비율을 비교하였다. 그 후, 누출 위치가 출구 압력에 미치는 영향에 대하여도 모든 파이프라인 경사각에 대하여 분석하였다.

• Structural Engineering and Mechanics
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• 제11권6호
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• pp.605-616
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• 2001

The purpose of this study is to investigate the effect of the shear wall location in rigid frames on the dynamic behavior of a roof structure due to vertical and horizontal earthquake motions. The study deals with a gabled long span beam supported by two story rigid frames with shear walls. The earthquake response analysis is carried out to study the responses of the roof: vibration mode, natural period, bending moment and horizontal shear force of the bearings. The study results in the following conclusions: First, a large horizontal stiffness difference between the side frames is caused by the shear wall location, which results in a large vertical vibration of the roof and a large shear force at the side bearings. Second, in this case, the seismic design method for ordinary buildings is not useful in determining the distribution of the static equivalent loads for the seismic design of this kind of long span structures.