• The Journal of Asian Finance, Economics and Business
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• 제10권2호
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• pp.183-193
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• 2023

This paper proposes and examines the economic impact of infrastructure improvement on the San-En-Nanshin region in the Chubu area of Japan. We develop a single transportation computable general equilibrium (CGE) model for each subregion within the San-En-Nanshin region. The explicit modeling of the transportation infrastructure is defined based on interregional commuting flows and business trips, considering the spatial structure of the San-En-Nanshin economy. A CGE model is integrated with an interregional transportation network model to enhance the framework's potential for understanding the infrastructure's role in regional development. To evaluate the economic impact of transportation improvement, we analyze the interrelationship between travel time savings and regional output and income. The economic impact analysis under the CGE framework reveals how transportation facilities and systems affect firm and household behavior and therefore induce changes in the production and consumption of commodities and transportation services. The proposed theoretical model was tested by using data from the 2005 IO tables of each subregion and the 2006 transport flow dataset issued by the Ministry of Land, Infrastructure, Transport, and Tourism in Japan. As a result, the paper confirms the positive effect of transportation investment on the total output and income of the studied region. Specifically, we found that while economic benefits typically appear in urban areas, rural areas can still potentially benefit from transportation improvement projects.

• 대한수학회보
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• 제45권4호
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• pp.671-680
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• 2008

Necessary conditions for the existence of common fixed points for noncommuting mappings satisfying generalized contractive conditions in a Menger convex metric space are obtained. As an application, related results on best approximation are derived. Our results generalize various well known results.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2022년도 제65차 동계학술대회논문집 30권1호
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• pp.263-264
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• 2022

본 논문은 회사 직원들의 재택근무와 출퇴근 관리를 위한 Web 페이지이다. 프로젝트의 핵심 기능은 캘린더를 이용한 직원들의 출퇴근 관리로 근태, 재택, 휴가, 급여 관리 기능이 포함되어있다. 각 회사에서 이 프로그램을 이용할 시 직원들은 출근, 퇴근 버튼 기능으로 시간을 기록하고 휴가신청과 재택근무 일정을 확인할 수 있다. 관리자들은 직원들의 출퇴근 일정 목록과 재택일정, 휴가일정을 확인 가능하고 수정, 관리할 수 있다. 채팅 기능을 활용하여 직원과 관리자의 원활히 소통이 가능하다. 회사에서 필요한 근태 관리 시스템 기능들을 제공한다.

• 한국철도학회논문집
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• 제16권6호
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• pp.482-491
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• 2013

현재 운영 중인 광역철도 승차권은 교통카드와 정기권 등으로 매우 제한되어 있어, 소비자 선택에 한계가 있으며, 소비자 수요의 다양성을 고려한 승차권 제도 도입이 필요한 실정이다. 이에 외국 주요도시에서 사용 중인 다양한 승차권 제도 운영을 분석하여 우리나라 수도권 광역철도 승차권 제도가 보다 효율적으로 운영되는 방안을 제시하였다. 주요내용으로는 대중교통 이용 촉진 및 비용부담 감소, 수익증대의 효과로 이어질 수 있도록 하여 외국에서 일반화되어 있는 1일권 승차권, 승용차 출퇴근자의 승객과 승차인원 증대를 위한 출퇴근권 및 경춘선 등에 서비스가 공급대비 수요가 부족한 경우에 한해 왕복 여행객에 대한 특별할인 왕복승차권 제도 도입을 제안하였다.

• 대한안전경영과학회지
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• 제19권4호
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• pp.253-260
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• 2017

Due to dramatic changes in the trend of corporate management in economics, labor and government, companies are being asked to adapt creative and innovative organizational culture in order to keep sustainability. Under the circumstances, flexible working hour becomes one of very effective method for organization culture improvement. Recently, M company has introduced the new policy of working hours that employees can choose a couple of different time options depending on their personal situations. And it turns out to be very effective to work & life balance, increasing organizational vitality, improving efficiency of business and productivity, recruitment of core human resources, and prevention of deviation; both team and personal performance levels has significantly improved. Therefore, it is highly recommended to adapt flexible working policies for companies seeking for a long term, sustainable corporate vision.

• 경영과학
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• 제9권1호
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• pp.3-15
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• 1992

In this paper, we study a manufacturing system of serial stages with general service times, in which the production of each stage and the coordination of stages are controlled by Kanban discipline. This Kanban discipline is modeled as a Discrete Event Dynamic System and a system of recursive equations is applied to study the dynamics of the system. The recursive relationship enables us to compare this Kanban discipline with the other blocking disciplines such as transfer blocking, service blocking, block-and-hold b, and block-and-hold K, and the Kanban is shown to be superior to the other disciplines in terms of makespan and throughput. As a special case, two stages Kanban system is modeled as $C_2/C_2/1/N$ queueing system, and a recursive algorithm is developed to calculate the system performance. In optimizing the system performance, the stochastic optimization approach of Robbins-Monro is employed via perturbation analysis, the way to estimate the stochastic partial derivative based on only one sample trajectory of the system, and the required commuting condition is verified. Then the stochastic convexity result is established to provide second-order optimality condition for this parametric optimization problem.

• 한국조경학회지
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• 제50권1호
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• pp.20-32
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• 2022

본 연구는 학교통학로 녹지가 보행자의 만족도와 조성 방향에 미치는 영향을 도출하기 위하여, 서울시 학교통학로 녹화사업이 완료된 2개 학교와 가로 녹지가 조성되지 않은 비교 대상지인 2개 학교의 학생을 포함한 보행자 313명을 대상으로 실시한 설문 결과를 분석하였다. 녹지 만족도 분석 결과 녹지가 조성된 학교는 만족도 8개 항목에 대해 모두 만족하였고, 전반적인 만족도에 가장 큰 영향을 미치는 항목으로는 '보도의 폭'(37%), '주변 경관과의 조화'(24.97%), '나무나 풀, 꽃의 배치'(18.30%), '전반적인 관리 상태'(10.44%)였다. 즉, 녹지 만족을 영향을 미치는 항목으로는 녹지가 위치하는 보도의 폭(너비)이 적정히 확보되어 보행에 문제가 없어야 하는 기능적 측면에 대해 가장 중요하게 생각하였고 녹지의 세부적 구성 요소보다는 전반적인 경관과의 조화에 대해 더욱 중요하게 인식하고 있었다. 이것은 기존 보도에 녹지를 조성하는 현재 사업 형태에 대한 재검토가 필요하며, 보행 편의성을 위한 보도폭의 확보가 가로녹지 조성 사업 시 가장 중점적으로 고려해야 할 사항임을 나타낸다. 녹지 조성 방향에 대한 인식 차이를 분석하면, 학교통학로 녹화사업을 통하여 가로녹지에 대한 경험을 한 응답자는 풀과 꽃 등 자연 소재에 대해 더욱 중요하게 인식하고 경관과 조화에 대해 중요하게 생각하였다. 녹지에 대한 관심도가 높고 필요성을 높게 인식하는 응답자 또한 나무와 풀, 꽃 등을 조성하는 등 자연 소재의 배치에 대해 중요하다고 인식하고 있었다. 또한 녹지의 기능성과 효과성에 대한 장점을 인지하는 그룹이 녹지 만족도가 높았다. 따라서 녹지 만족도를 향상하기 위해서는 녹지 효과성에 대한 환경 교육과 홍보, 안내판 조성 등을 통하여 효과성에 대한 인식을 확대할 필요가 있다. 또한 획일적 형태보다는 지역과 학교 특성을 반영하는 등의 노력이 더욱 필요할 것이다.

• Environmental Engineering Research
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• 제14권3호
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• pp.180-185
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• 2009

Only limited information is available as regards to the exposure levels of naphthalene (polycyclic aromatic hydrocarbons, PAHs) and monocyclic aromatic hydrocarbons(MAHs) in the interiors of diesel-fueled passenger cars, while many studies investigated the exposure levels of various volatile organic compounds(VOCs) in the interiors of gasoline-fueled passenger cars or public buses. Present study was performed to supplement this deficiency by measuring naphthalene (as a representative of PAHs) and MAHs levels inside five diesel-fueled and five gasoline-fueled passenger cars while morning and evening commuting on real roadways. Each car was surveyed five times on different sampling days. The in-vehicle naphthalene levels were higher for the diesel-fueled cars as compared to gasoline-fueled cars, whereas the results were reversed for the in-vehicle MAH levels. The median cabin levels of diesel-fueled cars were 1.3, 7, 13, 4, and 6 ${\mu}g/m^3$ for naphthalene, benzene, toluene, ethyl benzene, and m,pxylene, respectively. With respect to gasoline-fueled cars, their respective levels were 0.7, 11, 21, 7, and 9 ${\mu}g/m^3$ . The median MAHs concentration ratios of gasoline-fueled cars to diesel-fueled cars ranged from 1.50 to 1.75, while the median naphthalene concentration ratio was estimated to be 0.54. In addition, there was no significant difference of both naphthalene and MAHs between the diesel-fueled cars, but the in-vehicle levels were significantly different between gasoline-fueled cars. The concentration levels of both naphthalene and MAHs were higher in the passenger cars than other non-industrial microenvironments. Consequently, it was confirmed that the cabins of both diesel-fueled and gasoline-fueled passenger cars are an important microenvironment associated with the exposure to naphthalene and MAHs.

• 가정과삶의질연구
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• 제15권3호
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• pp.1-14
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• 1997

The purpose of this study is to review current home-based work study and identify factors associated with the choice of home-based work. Home-based work as an alternative form of employment is being sought today by both workers and business. The information age with its empasis on the recoding and transfer of information along with the technology of telectommuting has increased potential for and attention to home-based work. Home-based work seems to have several advantages particulary for women who carry the double burden of household work and paid work. The reduction in traffic congestion and demand of fossil fuels that accompanies the elimination of commuting has also been seen as a important social benifit. Home-base work has potential that can improve women's labor force participation. Further study is needed to evaluate home-based work and critical advice to current and prospect workers.

• 국토계획
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• 제54권3호
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• pp.49-62
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• 2019

In order to balance with supply policy, public housing management and operation policies have been implemented in terms of housing welfare, but citizens have not yet achieved the results that the citizens are experiencing. The purpose of this study is to analysis the residential satisfaction of the including the housing performance through the characteristics of the public housing residents in Seoul. The data used in this study is based on the survey data of public housing panel survey in Seoul (2016). The study method used ordered logistic regression analysis based on the fact that dependent variables appeared as ordered responses. Major research results are as follows. Firstly, housing performance and residential satisfaction may not match. Even though the satisfaction of housing area, type, and management fee is high, satisfaction with residential environment is low if commuting distance, the number of small libraries, and hospitals are small. Secondly, it showed different characteristics of residential environment factors among types of public housing. Rather than focusing on supply, customized supply is needed considering characteristics of public housing types. Thirdly, the policy for public housing needs to be realized by a fair policy on the residential environment. It is necessary to contribute to better housing stability as a customized policy considering the local residential environment.