• 인터넷정보학회논문지
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• 제20권3호
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• pp.129-135
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• 2019

최근 들어 전 세계적으로 추진되고 있는 5G가 4차 산업혁명에서 데이터의 흐름을 책임질 신경망 역할을 담당하고 향후 관련 시장에 대한 막대한 가치를 창출할 것으로 예상되고 있다. 하지만 5세대 네트워크의 장밋빛 전망과 5G 개통에 있어 선도적 위치에도 불구하고, 네트워크 사업자들은 5G 네트워크의 온전한 구축을 주저하고 있다. 이는 구축비용을 상회하는 사업모델이 부재하여 네트워크 사업들자이 막대한 구축비용의 회수가 어렵다고 판단하고 있기 때문이다. 더불어 5G의 사업 환경을 종합적으로 조사하거나 분석한 연구가 부족한 실정이다. 본 연구는 5G 실용화 및 활성화에 필수불가결한 관련 기술, 서비스, 정부정책 그리고 사업모델에 관한 연구이슈를 포괄적으로 제안하고 발전적 제언을 제시하였다.

• 국제강구조저널
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• 제18권5호
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• pp.1639-1653
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• 2018

Bolted connections are suitable due to high quality prefabrication in the factory and erection in the workplace. Prefabrication and modularization cause high speed of erection and fabrication, high quality and quick return of investment. Their technical hitches transportation can be removed by prefabrication of joints and small fabrication of components. Box-columns are suitable members for bolted structures such as welded steel structures with moment frames in two directions etc., but their continual fabrication in multi-story buildings and performing the internal continuity plate in them will cause some practical dilemmas. The details of the proposal technique introduced here, is to remove such problems from the box columns. Besides, some other advantages include new prefabricated bolted beam-to-column connections referred to BBCC. This connection is a set of plates joined to columns, beams, support, and bolts. For a better understanding of its fabrication and erection techniques, two connection and one structural maquettes are made. The present work aims to study the cyclic behavior of connection numerically. To verify the accuracy of model, a similar tested connection was modelled. Its verification was then made through comparison with test results. The behavior of connection was evaluated for an exterior connection using three different support shapes. The effects of support shapes on rigidity, ductility, rotation capacity, maximum strength, four rad rotation strength were compared to those of the AISC seismic provision requirements. It was found that single beams support has all the AISC seismic provision requirements for special moment frames with and without a continuity plate, and box with continuity plate is the best support in the BBCC connection.

• 한국항만학회지
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• 제9권2호
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• pp.9-24
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• 1995

The intensification of the competition among container terminals has led to important affect such as, decision making or aggressive intervention of customers for terminal operation. Therefore, in case of developed ports, the large transition of port operation is composed of the press of terminal customer than decision making of terminal manager. Overall port tariffs for using terminal is made out by the conference of terminal customers than the supreme headquarters of terminal operation, and the related investment of terminal has been made according to requisition or proposal of customers. Therefore, among decision making problems that shippers, shipping companies, and freight forwarder among decision making problems that shippers, shipping companies, and freight forwarder face, the choice of the container terminal is one of the most important problems. So, the decision making of the users seems to have a significant impact on the competitive power of container terminals. The main objective of this study is to design port marketing strategy for strengthening the competitive power of container terminals. The results of this study were found as follows: Firstly, port authority should establish user-oriented operation policy of terminal as the means of activating the opinion window, using terminal monitoring system(TMS). Secondly, terminal planning and development of government should be made to minimize the lead time, to induce the civil capital and to utilize the economies of scale. Thirdly, port authority needs to endeavor to analyze the information of competing foreign terminals as well to promote the concentrated marketing for the terminal on the users, to train the expert and to develop the new port charge system. Fourthly, to improve the competitive power of the container terminal, Port Authority should optimize the subsystems related to port marketing, far more these systems should be joined organically to work effectively. Finally, port authority system should be introduced, Namely, port should have the enterprise inclination as well s the public inclination.

• 산업경영시스템학회지
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• 제39권4호
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• pp.106-116
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• 2016

MTO (Make to Order) is a manufacturing process in which manufacturing starts only after a customer's order is received. Manufacturing after receiving customer's orders means to start a pull-type supply chain operation because manufacturing is performed when demand is confirmed, i.e. being pulled by demand (The opposite business model is to manufacture products for stock MTS (Make to Stock), which is push-type production). There are also BTO (Build to Order) and ATO (Assemble To Order) in which assembly starts according to demand. Lean manufacturing by MTO is very efficient system. Nevertheless, the process industry, generally, which has a high fixed cost burden due to large-scale investment is suitable for mass production of small pieces or 'mass customization' defined recently. The process industry produces large quantities at one time because of the lack of manufacturing flexibility due to long time for model change or job change, and high loss during line-down (shutdown). As a result, it has a lot of inventory and costs are increased. In order to reduce the cost due to the characteristics of the process industry, which has a high fixed cost per hour, it operates a stock production system in which it is made and sold regardless of the order of the customer. Therefore, in a business environment where the external environment changes greatly, the inventory is not sold and it becomes obsolete. As a result, the company's costs increase, profits fall, and it make more difficult to survive in the competition. Based on the customer's order, we have built a new method for order system to meet the characteristics of the process industry by producing it as a high-profitable model. The design elements are designed by deriving the functions to satisfy the Y by collecting the internal and external VOC (voice of customer), and the design elements are verified through the conversion function. And the Y is satisfied through the pilot test verified and supplemented. By operating this make to order system, we have reduced bad inventories, lowered costs, and improved lead time in terms of delivery competitiveness. Make to order system in the process industry is effective for the display glass industry, for example, B and C groups which are non-flagship models, have confirmed that the line is down when there is no order, and A group which is flagship model, have confirmed stock production when there is no order.

• 한국지반환경공학회 논문집
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• 제18권3호
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• pp.31-38
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• 2017

본 연구의 목적은 지반공학적 물성정보가 거의 없는 국내 중소규모 댐의 지진 시 파괴확률을 간편하게 산정할 수 있는 도표를 제시하는 것이다. 기존의 댐의 지진 시 파괴확률을 산정하는 방법 및 절차를 검토하여, 댐의 지반공학적 물성정보와는 상관없이 지진 시 파괴확률이 '0'이 되는 지진파괴확률 영곡선을 댐높이-여유고율 평면에서 쌍곡선의 형태로 결정하였다. 국내 중소규모 댐들의 댐높이-여유고율 분포형태가 지진파괴확률 영곡선과 같이 쌍곡선의 형태를 이루는 것을 확인하여, 다수의 등파괴확률 곡선(seismic failure probability contour)이 댐높이-여유고율 평면에서 일정한 간격의 다수의 쌍곡선들로 표시되는 지진파괴확률 산정 도표를 작성하였다. 작성된 도표는 비교적 관리가 잘 되고, 지반공학적인 정보를 충분히 가진 2개의 중소규모 댐들의 지진 시 파괴 확률 산정에 적용하여, 기존 절차와 방법으로 산정된 결과와 비교하여 적용 타당성을 확인하였다. 향후, 제안된 도표는 중소규모댐의 지진대비 보수보강의 투자 우선순위 등을 고려할 때 유용하게 활용될 수 있을 것으로 기대된다.

• 한국콘텐츠학회논문지
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• 제16권4호
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• pp.466-476
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• 2016

한국에 기술지주회사가 도입된 시기는 2008년이며, 2014년 기준으로 대학의 기술지주회사는 39개가 설립되어 운영 중이고 연구소 기술지주회사로는 에트리홀딩스(주)가 유일하다. 기술지주회사는 대학이나 연구소의 기술을 이전하고 창업을 지원하기 위해 설립되었는데, 기술지주회사가 도입된 지 7년이 경과하고 있지만 아직 본격적인 수익을 거두고 있지 않은 실정이다. 지주회사는 기본적으로 투자 회사이고 투자한 기업을 통하여 수익을 거두는 기업이며, 창업투자회사도 창업기업에 투자하여 수익을 거두는 기업으로 기본적으로 지주회사 수익 모델과 유사하다. 본 연구는 국내 2개 창업투자회사에 대한 사례 연구를 통해 기술지주회사의 수익 모델에 대한 바람직한 방향을 제시하고자 하였다. 즉, 재무제표 중심의 정량적 분석 결과, 기술지주회사의 바람직한 사업 모델로는 순수지주회사 보다는 사업도 같이 병행하는 사업지주회사 성격이 보다 적절하다는 것을 제시하였으며, 구체적 사업모델로 인큐베이팅이나 경영자문 등을 추가할 것을 제안하였다.

• 한국콘텐츠학회논문지
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• 제12권11호
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• pp.446-457
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• 2012

최근 건설공사에 이슈가 되고 있는 건축정보모델링(BIM)은 건설경기 둔화와 수주물량 감소에 따라 위기위식이 팽배한 건설산업의 새로운 돌파구로 주목받고 있다. 이미 건축분야는 국내외적으로 BIM을 도입하기 위해 관련연구가 활발히 진행되고 있다. 하지만 토목공사의 경우 건축공사와 달리 작업체계가 비반복적, 수평적, 비정형적이며, 프로젝트 수행 범위가 넓어 발생하는 정보의 양도 방대하여 건설사나 설계사에서는 BIM 구축을 위한 초기 투자비용의 부담과 투자대비 효과에 대한 의문과 부담을 갖고 있다. 이에, 국내 토목분야에 BIM을 적용하기 위해 토목설계 전문가들을 대상으로 BIM 기술수준을 파악하고 과거대비 현재 토목분야의 BIM에 대한 인식변화 분석을 통해 토목분야 BIM 활성화 저해요인을 파악하고 이를 해결할 수 있는 방안을 제시하였다. 도출된 활성화 방안은 가이드 개발, 제도 개발, 납품성과 검증, 국제표준 상정 등 4가지 분야로 구성된다. 연구결과는 토목분야 BIM 적용을 위한 표준과 납품 성과품의 검수 및 검증체계 개발 연구과제의 연구방향 설정을 위한 기초자료로 활용될 수 있을 것이다.

• 한국항만학회지
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• 제7권1호
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• pp.43-58
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• 1993

There has been fast progress in economy in Korea derived by a consecutive five-year plan program for economic development started in the early 1960's. In the field of transportation, rapid changes in the technological environment of transportation and communication have brought a revolution of the transport system, of which inter-modal transportation through containerisation is typical. Because of the rapidly growing traffic volumes of cargo, especially container traffic, and lack of investment into transport infrastructure in the past, both road and railway are beyond their capacity. As a result, the public-road network has suffered a serious congestion problem. For instance, in relation to the corridor between Seoul and Pusan, today, it takes about 14 hours for the journey of container trailer through Kyongbu Expressway, for which it used to take only 7 hours in 1986. For the railway, though the congestion problem is not very serious compared with the road sector, a shortage of capacity on certain main lines has emerged as a problem as railway traffic has increased. Furthermore, the further expansion of the system in near future is difficult due to burden of higher construction the cost. Unlike these two modes, coastal shipping, which has been paid relatively less attention for commodity transport in Korea, shows no constraint in this respect. In addition, it is the most cost efficient mode of transport. This work therefore aims to make a proposal for the alternative inland transportation mode, which is to promote the coastal transport of container. Three obstructing factors for the promotion of the coastal transport are investigated and some solutions for those are suggested as follows : First, it appears to be essential to provide exclusive ports for the coastal shipping, that comply with simplification, specialization and rationalization. The optimum size of berths on the exclusive ports in Pusan port is estimated as 16-20. We found that it needs periodical study and publicity on the advantages from the adoption of the coastal mode. Inducing competition in the coastal shipping market is also necessary. For the supply of the fleet in the coastal shipping, chartering of the surplus ships in the oversea shipping is found to be more desirable than new shipbuilding. Second, to solve the fragmentation of the companies which wish to participate in the coastal transport, government has to implement the subsidy policy. The encouragement of participation of the shipping lines engaging in Korea-Japan run and Korea-East South Asia run, into coastal shipping also needs to be considered cautiously. Third, simplification of the document for entry in ports is needed for rational coastal shipping management. We can use B/L (Bill of Lading) for coastal shipping as a prerequisite to get the indemnity by P & I Club. The reduction of the government controls on entering and leaving the ports also needs.

• 한국기후변화학회지
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• 제9권2호
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• pp.181-195
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• 2018

On December 12, 2015, the Conference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC) adopted the Paris Agreement, in which several developed and developing countries all committed to participating in the reduction of greenhouse-gas (GHG) emissions. South Korea has submitted an intended nationally determined contribution (INDC) proposal with a target to cut down 37% greenhouse gas business as usual (BAU) until 2030 in preparation for the 2030 GHG BAU. Under the post-2020 regime, which will be launched from 2021 as the agreement entered into force early, it is expected that efforts to support GHG reduction and adaptation to climate change in developing countries will be accelerated with the utilization of technologies and financial resources of developed countries. South Korea has established the Basic Plan for Climate Change Response and the Basic National Roadmap for Greenhouse Gas Reductions by 2030 to promote the response to climate change at the government level. The Ministry of Science and ICT, as the National Designated Entity designated by the UNFCCC, has come up with middle and long-term strategies for climate technology cooperation. South-Korea has an abundance of energy-consuming industries to support its export-oriented industrial structure; it is thus expected that achieving the GHG reduction target will incur a considerable cost. Moreover, in order to meet the reduction target (11.3%) of the intended nationally determined contribution proposed by South Korea, it is necessary for South Korea to actively promote projects that can achieve GHG reduction achievements, and financial resources are needed as leverage to reduce risks that can occur in the early stages of projects and attract private sector investment. This paper summarizes the theoretical discussions on climate finance and conducted a comparative analysis on the status of the funds related to climate change response in the UK, Germany, Japan and Denmark. Through this, we proposed the legal and policy tasks that should be carried forward to raise public funds that can be used for creation of new industries related to climate change as well as to reduce GHG emissions in South Korea. The Climate Change Countermeasures Act, which has been proposed by the National Assembly of South-Korea, stipulates the establishment of funds but there is no additional funding except for general account. In this regard, it is also possible to take measures such as the introduction of carbon tax or the collection and use of royalties through technology research and development projects for climate change, such as Industrial Technology Innovation Promotion Act. In addition, since funds are used in various fields such as domestic greenhouse gas reduction, technology development, and overseas projects, it is necessary to establish a system in which various ministries cooperate with the operation of the fund.

• 정보보호학회논문지
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• 제18권1호
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• pp.115-137
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• 2008

증권시장이 커짐에 따라 홈트레이딩시스템(Home Trading System)을 이용한 증권거래가 활발해지고 있다. HTS는 주식시세 조회를 비롯한 매매상담 등의 많은 기능을 제공하고 있다. 그러나 사용자의 편의성과 효용성을 중심으로 한 기능은 개발되고 적용되고 있지만 개인정보 및 거래의 안전성에 대한 보안기능은 미흡한 실정이다. 본 논문은 키로깅과 스니핑을 통해 HTS의 보안서비스를 분석하여 많은 개인정보가 노출됨을 설명한다. 그리고 취약점을 파악하여 HTS가 가져야할 바람직한 평가기준을 제시한다.