• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2009년도 춘계학술발표회
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• pp.113-119
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• 2009

해양시설의 다양화, 해양환경관리업의 활성화, 해양환경관리법의 시행 둥으로 인하여 해양오염방지관리인 교육 제도에도 변화가 예상된다. 2011년부터는 해양오염방지관리인 교육과정을 해양환경관리공단에서 운영하기 때문에 교육 수요에 영향을 미치는 요인을 분석하여 교육계획을 수립하여야 한다. 해양시설 해양오염방지관리인의 교육수요에 영향을 미칠 수 있는 주요요인을 살펴본 결과, 해양시설의 증가 및 해양환경관리업의 성장이 해양시설 해양오염방지관리인 교육생수에 크게 영향을 미치는 것으로 나타났다.

• 한국항해학회지
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• 제13권1호
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• pp.21-53
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• 1989

In the past twenty years, there has been a rapid increase in the volume of traffic in Korea due to the Korean great growth of the Korean economy. Since transformation provides an infrastructure vital to economic growth, it becomes more and more an integral part of the Korea economy. The importance of coastal shipping stands out in particular, not only because of the expansion limit on the road network, but also because of saturation in the capacity of rail transportation. In spite of this increase and its importance, coastal shipping is falling behind partly because it is givenless emphasis than ocean-going shipping and other inland transportation systems and partly because of overcompetition due to excessive ship tonnage. Therefore, estimating and planning optimum ship tonnage is the first take to develop Korean coastal shipping. This paper aims to estimate the optimum coastal ship tonnage by computer simulation and finally to draw up plans for the ship tonnage balance according to supply and demand. The estimation of the optimum ship tonnage is peformed by the method of Origin -Destimation and time series analysis. The result are as follows : (1) The optimum ship tonnage in 1987 was 358, 680 DWT, which is 54% of the current ship tonnage (481 ships, 662, 664DWT) that is equal to the optimum ship tonnage in 1998. this overcapacity result is in excessive competition and financial difficulties in Korea coastal shipping. (2) The excessive ship tonnage can be broken down into ship types as follows : oil carrier 250, 926 DWT(350%), cement carrier 9, 977 DWT(119%), iron material/machinery carrier 25, 665 DWT(117%), general cargo carrier 17, 416DWT(112%). (3) the current total ship crew of 5, 079 is more than the verified optimally efficient figure of 3, 808 by 1271. (4) From the viewpoint of management strategy, it is necessary that excessive ship tonnage be reduced and uneconomic outdated vessels be broken up. And its found that the diversion into economically efficient fleets is urgently required in order to meet increasing annual rate in the amounts of cargo(23, 877DWT). (5) The plans for the ship tonnage balance according to supply and demand are as follows 1) The establishment of a legislative system for the arrangement of ship tonnage. This would involve; (a) The announcement of an optimum tonnage which guides the licensing of cargo vessels and ship tonnage supply. (b) The establishment of an organization that substantially arrangement tonnage in Korea coastal shipping. 2) The announcement of an optimum ship tonnage both per year and short-term that guides current tonnage supply plans. 3) The settlement of elastic tariffs resulting in the protect6ion of coastal shipping's share from other tonnage supply plans. 4) The settlement of elastic tariffs resulting in the protection of coastal shipping's share from other transportation systems. 4) Restriction of ocean-going vessels from participating in coastal shipping routes. 5) Business rationalization of coastal shipping company which reduces uneconomic outdated vessels and boosts the national economy. If we are to achieve these ends, the followings are prerequisites; I) Because many non-licensed vessels are actually operating and threatening the safe voyage of the others in Korea coastal routes, it is necessary that those ind of vessels be controlled and punished by the authorities. II) The supply of ship tonnage in Korean coastal routes should be predently monitored because most of the coastal vessels are to small to be diverted into ocean-going routes in case of excessive supply. III) Every ship type which is engaged in coastal shipping should be specialized according to the characteristics of its routes as soon possible.

• 대한토목학회논문집
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• 제37권3호
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• pp.593-601
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• 2017

우리나라는 1970년 이후 급격한 산업발달로 인해 도시의 팽창과 집중현상, 그리고 자동차등록대수의 증가로 교통량이 증가하게 됨으로써 교통의 지정체, 주차문제와 같은 다양한 교통문제가 야기되고 있는 실정이다. 특히, 이웃주민과의 다툼 등 사회적 문제로도 제기되고 있는 주차문제를 해결하기 위해 주차장 설치 및 관리에 관한 시행령 및 규칙을 재정하여 운영하고 있으나, 시설별 용도의 다양성과 복합적인 기능으로 인해 탄력적인 법정주차면 산정에는 그 한계를 내포하고 있다. 이에 본 연구에서는 주차면 공급에 법정주차대수 및 평균 원단위를 이용한 주차수요예측방법의 단점을 보완하기 위해 기존의 연구문헌 고찰을 통해 변수를 선정하여, 변수에 따른 현장조사 자료를 수집하고 주차수요에 영향을 미치는 요인을 다중회귀분석을 통해 적정 주차면을 산정하였으며, 누적주차대수를 기준으로 평균 원단위로 산정된 주차면과 예측모형으로 산정된 주차면을 비교하였다. 그 결과, 평균원단위법으로 산정된 주차면은 누적주차대수보다 9.99% 더 적게 산정되었고, 모형식을 활용한 주차면의 경우에는 4.37% 더 많게 산정되었다. 이는 주차면 산정방식에 있어서 주차면 예측모형이 보다 더 효율적임을 알 수 있다. 본 연구에서 구축한 주차면 산정 모형은 주차수요에 영향을 미칠 수 있는 다양한 환경 요인들을 고려하게 됨으로써, 지역의 특성에 맞는 현실적인 주차수요 예측이 가능하게 되었고, 효율적인 주차면의 공급이 이루어질 수 있을 것으로 판단된다.

• 한국항만경제학회지
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• 제36권3호
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• pp.1-20
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• 2020

연안 여객항로는 육지와 섬지역의 연결, 섬주민의 수송수단, 섬지역 관광과 같은 역할을 수행하기 때문에 매우 중요하다. 특히 최근 국민소득의 증대, 일과 휴식이 균형 잡힌 워라벨(Work-life balance) 문화의 확산, 주 5일제 도입 등 삶의 질이 향상됨에 따라 여가문화생활인 여행에 대한 관심이 높아졌으며, 이에 섬지역에 대한 우리 국민의 관광 수요 증가하고 있다. 이러한 연안관광 환경 변화에 의해서 연안 여객터미널 이용객수가 증가함에 따라 연안 여객터미널 시설 및 서비스에 대한 중요성과 필요성이 점점 증대되고 있다. 이러한 상황에서 여객터미널 관리 조직들이 예산을 합리적으로 집행하여 여객터미널 이용객의 이용편익을 제고할 수 있도록 연안 여객터미널을 효율적으로 관리 운영할 필요가 있다 본 연구에서는 연안 여객터미널 관리·운영기관(업체)이 수익성 중심의 경영과 공공성 중심의 경영을 효율적으로 하고 있는지에 대한 평가 및 분석을 실시하였다. 연안여객 터미널의 경여 효율성 평가를 위하여 터미널의 건물 연면적, 투입인력, 예산지출 대비 이용객수와 운영수입의 관계를 분석하고, 이들 투입 및 산출변수들을 투입한 DEA분석을 통해 경영효율성을 비교 평가하였다. 분석결과, 분석결과 15개 터미널 중 인천항 제1국제, 사동항, 포항항, 목포항 제2 연안, 부산항 연안 여객터미널의 경영효율성이 떨어지는 것으로 나타났다. 전체 연안 여객터미널과 비교하여 수익성이 낮은 것으로 평가되는 8개 터미널은 섬관광 활성화와 러시아 및 일본지역 항로 개발(동해항 국제)을 통해 이용객수 증가에 따른 터미널 이용료 수입을 증대시키고, 터미널 사무실 임대 수입 및 부대사업 수입을 증대시켜 수익성을 개선하여야 할 것이다. 공익성의 경영효율성이 낮은 8개 터미널은 섬관광 홍보 및 마케팅 강화, 일본 및 중국 연안지역 관관상품 개발, 항로 개발, 초대형 쾌속선 도입 등을 통해 이용객수를 증대시켜나가야 할 것이다. 이 연구는 연안 여객터미널의 건물 연면적, 투입인력, 예산지출의 투입지표와 운영수입 및 이용객수의 산출지표를 할용하여 경영 효율성을 최초로 평가하고, 터미널의 특성을 반영하여 수익성 및 공익성의 경영효율성 개선방안을 제시하였다는 점에서 연구의 의의가 크다고 할 수 있다.

• 한국해양공학회지
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• 제33권6호
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• pp.641-647
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• 2019

Yearly world vehicle production has continued to increase, and the global seaborne trade volumes also are recovering. Based on these positive trends, as demand for cargo ships increases in the freight transportation market, Pure car and truck carriers (PCTCs) with large gaps between decks continue to be ordered. The structural analysis of the cargo hold was performed in order to confirm its structural safety in accordance with the guidance for the direct strength assessment of the Korean Register (KR) of Shipping. And, according to the type of cargo, the maximum deflection and structurally weak area that occurred in deck 5 was confirmed. Also, it was found that the weight of the cargo had a significant effect on the deck, the primary members of the deck's structure, and pillars. The results of the structural analysis conducted in this study were added to the existing cargo load planning software. This was done so that the prediction of the maximum stress and the deflection of the deck based on the information about the cargo could be confirmed quickly. In addition, the data will be used as the basic data for rapid information management response to changes in cargo items.

• 도시과학
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• 제6권2호
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• pp.29-34
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• 2017

Although the supply of public parking lots in major cities is steadily increasing, there is still a shortage of parking spaces that take into account the characteristics of actual available parking spaces. These parking problems are caused by conflicts between users, illegal occupation and privatization of roads, interference with traffic roads, and business stagnation in commercial areas and illegal parking problems. In addition, despite various parking demand management policies and continuous supply of public parking facilities, the solution to the parking problem is uneasy due to increased construction costs and changes in social conditions. In order to solve this problem, it was judged that it would be necessary to utilize the existing public parking lots efficiently. Therefore, we collect the variables expected to affect the turnover, and use multiple regression models. The results are summarized as follows. Firstly, public parking lots can be classified into four types using utilization rate and turnover rate. Secondly, influencing factors are found including index of public transportation usage convenience, index of illegal parking, and land use characteristics in central commercial district. Thirdly, it was shown that there was little impact by the size of public parking lots, separation distance to subway distance, separation distance to bus stops, transfer zone, residential zone, and second-rated lots by parking costs. Finally, it is found that public parking lots can be improved by proving accessibility of public transit, enforcement of illegal parking, active approaches supporting public parking lots. It is also recommended that public parking cost rating system based mainly on land use characteristics should be remedied and rearranged.

• 대한토목학회논문집
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• 제32권3D호
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• pp.213-222
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• 2012

부산시는 2007년 시내버스 준공영제 시행 이후 버스 서비스 향상을 통한 이용활성화를 도모하고자 노력하고 있다. 이를 위해 시내버스 이용자를 대상으로 서비스 만족에 영향을 미치는 주된 요인을 살펴보고자 하였다. 본 연구에서는 시내버스 서비스 20개 항목을 기본적 서비스, 안전운행, 노선정보, 쾌적도, 청결도 및 편의시설의 상위 6개 영향요인으로 구분하고, 각 세부 서비스에 대한 선호의식을 분석하였다. 그리고 시내버스 이용자의 일반적 특성(성별, 연령), 교통 행동(이용횟수, 탑승시간)과 교통환경(기온, 강수)에 따른 다양한 조건에서의 버스 서비스 만족 영향을 도출하였다. 이 연구결과는 기후변화에 대비하는 버스 정책과 버스 이용활성화를 위한 운영계획 수립 시 중요한 의사결정 기초자료로 활용될 것이다.

• 지질공학
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• 제29권4호
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• pp.417-425
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• 2019

농업용 지하수 이용은 국내 지하수 이용량의 51.8%를 차지하고 있어 정확한 이용량 산정은 지하수의 효율적 정책 추진을 위하여 중요하다. 본 연구에서는 370개 관정의 이용량 실측 자료를 토대로 회귀나무 모형을 적용한 농업용(전작 및 답작용) 관정의 지하수 이용량의 산정 기법을 개발하고자 하였다. 모델의 입력 변수는 우물의 심도, 토출관 구경, 양수능력 등 3개가 유의한 것으로 평가되었으며, 모델에서의 각 변수의 중요도는 우물의 심도가 75%, 토출관 구경이 17%, 양수능력이 8%로 나타났다. 회귀나무 모형에 의한 농업용(전작 및 답작용) 관정의 일 이용량은 실측 이용량과 매우 유사한 것으로 평가되었으며, 기존의 국토교통부에서 제시한 추정식에 비하여 실측 이용량에 보다 근사한 것으로 나타났다. 향후 추가적인 실측 표본 자료를 확보하여 본 방법을 보완, 적용한다면 지하수 이용량 통계의 신뢰도가 크게 향상될 것으로 기대된다.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2001년도 The Seoul International Simulation Conference
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• pp.9-10
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• 2001

Simulation has been evolved with the advance of computer and technique of modeling application systems. Early simulations were numerical analysis of engineering models known as continuous simulation, analysis of random events using various random number generators thus named as Monte Carlo simulation, iud analysis o(\\\\`queues which are prevalent in many real world systems including manufacturing, transportation, telecommunication. Discrete-event simulation has been used far modeling and analyzing the systems with waiting lines and inefficient delays. These simulations, either discrete-event, continuous, or hybrid, have played a key role in industrial age by helping to design and implement the efficient real world systems. In the information age which has been brought up by the advent of Internet, e-business has emerged. E-business, any business using Internet, can be characterized by the network of extended enterprises---extended supply and demand chains. The extension of value chains spans far reaching scope in business functions and space globally. It also extends to the individual customer, customer preferences and behaviors, to find the best service and product fit for each individual---mass customization. Simulation should also play a key role in analyzing and evaluating the various phenomena of e-business where the phenomena can be characterized by dynamics, uncertainty, and complexity. In this tutorial, applications of simulation to e-business phenomena will be explained and illustrated. Examples are the dynamics of new economy, analysis of e-business processes, virtual manufacturing system, digital divide phenomena, etc. Partly influenced by e-business, a new trend of simulation has emerged called agent-based simulation, Agent-based simulation is a technique of simulation using software agent that have autonomy and proactivity which are useful in analyzing and integrating numerous individual customer's behavior. One particular form of agent-based simulation is swarm. This tutorial concludes with the illustration of swarm or swarm Intelligence applied to various e-business applications, and future directions and implications of this new trend of simulation.

• 수산경영론집
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• 제26권1호
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• pp.9-27
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• 1995

From now on, the direction of fishery products circulation measure should be improved the system to give just the right of free choice of sale route like retail, direct sale, direct dealings and direct shipping only for fishermen to produce them diversifing the function and the role of current fish market in the production to prepare the fishery internationalization, to improve the competitiveness of coastal and off-shore fishery. Practically wholesale market in land and fish market in the production have the different function and role, the organization of wholesale market in land can't substitute the essential function and role which fish market in the production should perform. So far, fisheries cooperatives as a managing subject of fish market in the production have depended on the consignment sales and purchases of fishery products but, from now on, it should be explore the widespread supply way of fishery products by producing value - added fishery products that should bring higher demand from the consumers, producer - consumer direct marketing system through not only consignment sales but also direct sales that common processing and manufacturing system of fishery products under the management of FC has been established. The direction of the idealest structural improvement of fishery production circulation organization is to establish the the position of the fishery retail price leader based on the standard of market in the fisheries production due to existing characteristics of fisheries, accordingly, to harmony the market organization of direct transportation, direct sales and direct dealings form by producer and group of producers with market organization in the fisheries production, and to make the condition to do the appropriate distributive function.