• 대한토목학회논문집
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• 제29권4D호
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• pp.467-472
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• 2009

현재 서울시의 대중교통 이용수요는 최근의 버스개편 등 대중교통 서비스 개선에도 불구하고 그 분담률은 크게 증가하지 못하고 있으며 특히, 지하철의 경우 오히려 감소하고 있는 추세이다. 지하철 분담률 증진을 위해서는 그 해법을 대중교통 지향형 역세권 개발(TOD : Transit Oriented Development)에서 찾을 수 있어 이에 대한 정책전환이 필요하다 할 수 있다. 따라서 본 연구는 대중교통지향형 역세권 개발을 위해 고려되어야 할 토지 및 교통 측면의 공급과 수요관련 변수들을 이용하여 유형별(주거, 비주거지역) 영향 모형을 개발하고, 분석결과를 토대로 역세권의 이용자 및 대중교통 공급수준의 영향인자를 제시하는 것이 목적이다. 첫째, 토지이용특성(주거, 비주거)에 따라 대중교통 이용자의 통행패턴이 상이하게 나타날 것이라는 대전제는 군집분석 결과를 바탕으로 증명되었다. 둘째, 주거지역에서 고려되어야 할 사항으로는 환승거리, 정류장수, 단거리노선수, 자전거면수와 같은 버스측면의 대중교통 서비스범위와 관련된 시설 공급수준이 강한 것을 알 수 있다. 셋째, 비주거 지역에서 우선적으로 고려되어야 할 사항으로는 노선수, 배차간격, 운영시간, 역간거리와 같이 도시철도와 관련된 운영특성의 공급수준이 강한 것을 알 수 있다. 이는 향후 역세권 중심의 대중교통 정책 수립시 교통측면의 영향요인들의 우선순위를 제시해 줄 수 있을 것이라 판단된다.

• 한국엔터테인먼트산업학회논문지
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• 제15권7호
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• pp.45-57
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• 2021

본 연구는 최근 현저하게 증가하고 있는 어린이들의 유튜브 이용량에 영향을 미치는 변인들에 대한 연구이다. 이를 위해, 유튜브 이용에 영향을 미치는 변인으로 이용방식, 조절능력, 콘텐츠 인식, 중재방식을 설정하고, 연령대별 이들 변인들을 비교하고 유튜브 이용량에 어떻게 영향을 미치는지를 분석하는 것을 목적으로 하고 있다. 연구결과, 연령대별 이용량은 차이가 없었으나 이용방식 중 구독채널 유무와 일반채널 이용, 조절능력, 콘텐츠 인식, 그리고 중재 방식 중 기술통제와 감독은 차이가 있는 것으로 나타났다. 이용량에 영향을 미치는 변인들은 3-4세 집단은 구독채널 유무와 감독이, 5-6세 집단은 구독유무, 조절능력, 일반채널, 부모감독, 대화지도의 순으로 나타났다. 7-9세 집단은 구독채널 유무, 조절능력, 프리미엄 서비스 가입으로 나타났다. 이러한 결과는 연령대별 유의미한 변인들의 유사성과 상이성을 발견함으로서 유튜브 이용량을 감소시키는 전략을 다르게 구사해야 한다는 것을 시사한다. 또한 그동안 덜 다루어진 어린이의 유튜브 이용방식에 대한 보다 구체적인 분류와 이들 방식들이 미치는 영향력에 대한 연구의 필요성을 제기하고 있다.

• 디지털융복합연구
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• 제19권11호
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• pp.287-300
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• 2021

본 연구의 목적은 기술발전과 비대면서비스의 증가에 의해 전통적인 서비스가 디지털서비스로 전환되고 있으므로, 디지털로 전환된 서비스가 수용자의 사용의도에 미치는 영향관계를 검증하는 데 있다. 연구는 프로그램 개발 절차와 프로그램 효과성 검증 절차로 이루어졌고, 다중회귀분석과 함께 조절된 매개효과를 검증하기 위해 Bootstrapping을 실시하였다. 연구대상은 국내에 거주하는 대학(원)생과 일반인 323명을 대상으로 진행되었다. 연구결과. 첫째, 디지털로 전환된 서비스의 지각된 상호작용 세 요인(지각된 커뮤니케이션, 지각된 제어, 지각된 반응성)은 지각된 유용성과 지각된 사용용이성에 각각 긍정적인 영향을 주는 것으로 나타났다. 둘째, 기술수용의도의 영향관계를 검증하였다. 셋째, 디지털로 전환된 서비스의 지각된 상호작용 세 요인이 사용의도에 미치는 영향은 지각된 유용성과 지각된 사용용이성에 의해 매개됨을 확인할 수 있었다. 넷째, 디지털 격차에 의한 조절된 매개효과를 확인하였다. 그 결과, 디지털로 전환된 서비스의 지각된 상호작용 세 요인이 디지털로 전환된 서비스 사용의도의 중요한 요인임을 확인했고, 디지털격차에 의해 디지털전환 서비스에 대한 수용의도가 달라질 수 있으므로 국가과 기업차원의 디지털격차를 최소화하기 위한 노력이 필요함을 시사한다.

• 지식경영연구
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• 제23권2호
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• pp.143-168
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• 2022

본 연구는 Herzberg의 동기-위생이론을 이용하여 모바일 안면인식결제서비스의 수용 및 저항에 미치는 영향과, 사용자의 혁신성이 동기요인과 위생요인에서 수용과 저항에 미치는 영향 또한 조사하였다. 모바일 결제서비스 이용 경험이 있는 중국의 사용자를 대상으로 설문조사를 하였으며, 통계 분석은 IBM SPSS Statistics 26과 SmartPLS 3.0을 이용하였다. 분석결과, 모바일 안면인식결제서비스의 동기요인은 수용에 정(+)의 영향을 미치고 있으며, 저항에는 유의한 결과가 나타나지 않았다. 또한 위생요인은 수용에서는 부(-)의 영향을, 저항에는 정(+)의 영향을 미치는 것으로 나타났다. 매개변수인 사용자 혁신성은 동기요인과 수용에서는 완전매개효과를, 위생요인과 저항에서는 부분매개효과가 있었다. 연구결과를 통해 발견된 동기 요인인 신속성, 편재성, 지각된 유용성, 지각된 사용용이성, 비접촉성과 위생 요인인 프라이버시 염려, 보안성, 현상유지관성, 사용장벽, 손실회피성은 모바일 안면인식결제서비스의 활성화를 위한 기초자료로 사용될 수 있을 것으로 판단한다.

• Journal of Korean Academy of Oral Health
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• 제42권4호
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• pp.136-144
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• 2018

Objectives: The aim of this study is to analyze the differences in factors related to the incidence of dental caries between children in fluoridated and non-fluoridated areas and compared the DMFT and DMFS scores to confirm the effect of water fluoridation program (WFP) in Geoje and Changwon. Methods: The oral health examination and questionnaire survey were conducted in fluoridated and non-fluoridated areas. The number of surveyed children aged 8, 10, and 12 years in the fluoridated and non-fluoridated area of two cities was 1,524 and 1,383, respectively. Self-recorded questionnaires included self-perception of their own dental health, daily toothbrushing frequency, intake frequency of cariogenic sweet snacks and beverages, experience of gingival bleeding, experience of unmet dental treatment, and use of oral hygiene device except for toothbrush and toothpaste. The prevalence of caries and fissure-sealant status were surveyed. The logistic regression analysis was used to analyze the difference in children's self-rated oral health status between the fluoridated and non-fluoridated area. The mean number of sealed teeth and surfaces, marginal means of the DMFT and DMFS scores adjusted for the difference in the samples' sex distribution, and region were compared between the fluoridated and non-fluoridated areas. Results: In the fluoridated area, the experience rate of unmet dental treatments was higher among children aged 10 years, intake frequency of cariogenic sweet snacks and beverages were higher among the whole sample, and experience rate of professional fluoride application were lower than in the non-fluoridated area. The DMFT score for permanent dentition adjusted for differences in sex, region, and mean number of fissure-sealed teeth in the fluoridated area was significantly lower among whole samples and 8-, 10-, and 12-year-olds alone than in the non-fluoridated area. Conclusions: WFP can alleviate oral health inequality because it is effective in reducing the incidence of caries among children is disadvantaged demographic, socioeconomic, and cultural contexts.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1994년도 FIFTH WESTERN PACIFIC REGIONAL ACOUSTICS CONFERENCE SEOUL KOREA
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• pp.692-697
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• 1994

In the actual sound environmental systems, it seems to be essentially difficult to exactly evaluate a whole probability distribution form of its response fluctuation, owing to various types of natural, social and human factors. Up to now, we very often reported two kinds of unified probability density expressions in the standard expansion from of Hermite and Laguerre type orthonormal series to generally evaluate non-Gaussian, non-linear correlation and/or non-stationary properties of the fluctuation phenomenon. However, in the real sound environment, there still remain many actual problems on the necessity of improving the above two standard type probability expressions for practical use. In this paper, first, a central point is focused on how to find a new probabilistic theory of practically evaluating the variety and complexity of the actual random fluctuations, especially through introducing some equivalence transformation toward two standard probability density expressions mentioned above in the expansion from of Hermite and Laguerre type orthonormal series. Then, the effectiveness of the proposed theory has been confirmed experimentally too by applying it to the actual problems on the response probability evaluation of various sound insulation systems in an acoustic room.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(II)
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• pp.385-390
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• 2003

Recently, use of Continuous Welded rail(CWR) is increased for structural, economical reason but new problem is caused accordingly and phenomenon that give threat in traveling by ship stability of train is led. According as rail is prolonged, excessive relative displacement and longitudinal force can happen to rail by temperature change and external force. Specially, buckling or fracture of rail can happen in railroad bridges because relative displacement by bridge and properties of matter difference between rail grows and additional axial force happens to rail by behavior of bridge. According to several study, longitudinal force of rail in bridge is influenced with ballast resistance, elongation length, boundary condition, stiffness of framework. Non-linear behavior of ballast acts by the most important factor in interaction between rail and bridge. Therefore, must consider stiffness of bridge construction with non-linear characteristic of ballast and stiffness of base for accuracy with longitudinal force calculation and analyze. In this study, perform material non-linear analysis for longitudinal force of CWR and three dimensional buckling analysis to decide buckling force.

• Nutrition Research and Practice
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• 제7권3호
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• pp.199-206
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• 2013

This study was performed to compare the dietary food and nutrient intakes according to supplement use in pregnant and lactating women in Seoul. The subjects were composed of 201 pregnant and 104 lactating women, and their dietary food intake was assessed using the 24-h recall method. General information on demographic and socioeconomic factors, as well as health-related behaviors, including the use of dietary supplements, were collected. About 88% and 60% of the pregnant and lactating women took dietary supplements, respectively. The proportion of dietary supplements used was higher in pregnant women with a higher level of education. After adjusting for potential confounders, among the pregnant women, supplement users were found to consume 45% more vegetables, and those among the lactating women were found to consume 96% more beans and 58% more vegetables. The intakes of dietary fiber and ${\beta}$-carotene among supplement users were higher than those of non-users, by 23% and 39%, respectively. Among pregnant women, the proportion of women with an intake of vitamin C (from diet alone) below the estimated average requirements (EAR) was lower among supplement users [users (44%) vs. non-users (68%)], and the proportion of lactating women with intakes of iron (from diet alone) below the EAR was lower among supplement users [usesr (17%) vs. non-users (38%)]. These results suggest that among pregnant and lactating women, those who do not use dietary supplements tend to have a lower intake of healthy foods, such as beans and vegetables, as well as a lower intake of dietary fiber and ${\beta}$-carotene, which are abundant in these foods, and non-users are more likely than users to have inadequate intake of micro-nutrient such as vitamin C and iron.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.591-599
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• 2021

The increased risk in financial firms, due to Global Financial Crises and high international trade activities, has encouraged banks to use derivatives for both managing their financial risk and earning non-operating income simultaneously. The present study brings new evidence in the existing literature by determining the drivers behind financial derivative usage in Pakistani banks for 2011 till 2016. Moreover, the paper examines how risk plays a moderating role in determining the relationship between derivative usage and bank value. While assessing the determinants, a two-stage test has conducted, first, the logit regression was used to test the drivers behind the derivative usage in banks. Second, Tobit regression was run to analyze the factors leading to determine the extent of derivative usage. The findings demonstrate that Pakistani banks are using derivatives for both risk management and speculative motive as they are customers and users of derivatives at the same time. Empirical results, regarding moderating role of risk on the value implications of derivative usage, provide mixed findings as derivative usage gives value premium in case of non-systematic risk and foreign exchange risk. Whereas value discounts have been observed for cases where systematic risk is high and managers try to earn non-operating income from speculative activities.

• Design & Manufacturing
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• 제11권2호
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• pp.29-36
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• 2017

In this study, the non-contact type bicycle generator system considering the recharge is developed to use the eco-friendly energy source when the bicycle is operating. The following three main factors are considered in this study. One of factors is that the intensity of the rotating magnet is in the range of 2,700~4,300 [Gause]. The next factor is that the separation distance of rotating magnet and bicycle rim is in the range of 1.5-3.0 mm. The last factor is that the pedaling speed is in the range of 55 RPM [Wheel speed 5.6Km]~150 RPM [Wheel speed 15.25Km] consirering with the 5 staged gear transmission. The obtained results are as followed. (1) The generator output voltage gradually increases from 3V to 10V with the pedaling speed increases, at the separation distance is less than 2.5 mm and the operating voltage of the LED lamp is generated at a pedaling speed of 60 RPM or more. (2) The output current of the generator increases from 20mA to 40mA with the pedaling speed increases, at a separation distance is less than 2.0 mm and the operating current of the LED lamp is generated at a pedaling speed of 60 RPM or more. (3) When the separation distance was 3.0 mm, the output voltage and current are significantly lower than those of the bicycle LED lamp is generated. (4) The charging time is expected to be 12.24 ~ 17.65 hours when the magnitude of the magnet is 3,400[Gauss] at a pedaling speed of 55 RPM or more. (5) As a result of this study, it is thought that the non-contact type bicycle generator system considering the recharge can replace the conventional friction power generation system.