• 경영과학
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• 제10권2호
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• pp.79-91
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• 1993

Strategic decisions related to the design of a physical distribution system can be classified into three basic components : facility location, transportation, inventory decisions. In this research the interdependence of those decisions are expressed in a mathematical model such that the total relevant cost of the system is minimized. We suggested a heuristic technique for solving the model. In broad terms, our solution technique combines a heuristic method for determining which candidate DCs to open and an exact method for minimizing costs given a set of open DCs. And we also developed a decision supporting package for the design of a physical distribution system.

• 기술혁신학회지
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• 제21권2호
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• pp.738-766
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• 2018

본 논문의 목적은 정부에서 지원하는 자동화, 스마트 공장 구축 지원사업이 기업의 경영성과에 미치는 효과를 분석하는 것이다. 이를 위해서 t-test 및 ANOVA 등의 방법을 이용하였다 지원기업과 비지원 기업간 비교시 발생하는 실험집단과 통제집단간의 선택편의 문제를 해결하기 위해 PSM 방법을 활용하였다. 분석결과, 자동화 지원사업의 효과는 미미한 것으로 나타났으나 스마트 지원사업의 경우 일정 시차가 지난 후 매출액과 연구개발비가 증가하는 것을 확인할 수 있었다. 정부지원 효과가 나타나는데 어느 정도 시차가 발생하는 것으로 확인되었고 자동화 지원사업의 경우는 직접적인 영향을 주기 보다는 연구개발 비율 등과 같은 매개변수의 증대를 통해 장기적 매출 증대로 이어지는 것을 확인할 수 있었다. 본 연구는 정부 지원사업의 신규예산 확보와 개선방안을 모색하는데 유용한 기초자료로 활용될 것이다.

• 방사선산업학회지
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• 제9권1호
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• pp.29-35
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• 2015

Radiation technology is the one for developing new products or processes by applying radiation or for creating new functions in industry, research and medical fields, and its application is increasing consistently. For securing an advanced technology competitiveness, it is required to create a new added value by information consumer through providing an efficient system for supporting information, which is the infrastructure for research and development, contributed to its collection, analysis and use with a rapidity and structure in addition to some direct research and development. Provision of the management structure for information resources is especially crucial for efficient operating the system for supporting information in radiation technology, and then a standard classification structure of information must be first developed as the system for supporting information will be constructed. The standard classification structure has been analyzed by reviewing the definition of information resources in radiation technology, and those classification structures in similar systems operated by institute in radiation and other scientific fields. And, a draft version of the standard classification structure has been then provided as 7 large, 25 medium and 71 small classifications, respectively. The standard classification structure in radiation technology will be developed in 2015 through reviewing this draft version and experts' opinion. Finally, developed classification structure will be applied to the system for supporting information by considering the plan for constructing this system and database, and requirements for designing the system. Furthermore, this structure will be designed in the system for searching information by working to the individual need of information consumers.

• The Journal of Advanced Prosthodontics
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• 제8권2호
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• pp.85-93
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• 2016

PURPOSE. The purpose of this study was to determine the effect of anchorage systems and palatal coverage of denture base on load transfer in maxillary implant-retained overdenture. MATERIALS AND METHODS. Maxillary implant-retained overdentures with 4 implants placed in the anterior region of edentulous maxilla were converted into a 3-D numerical model, and stress distribution patterns in implant supporting bone in the case of unilateral vertical loading on maxillary right first molar were compared with each other depending on various types of anchorage system and palatal coverage extent of denture base using three-dimensional finite element analysis. RESULTS. In all experimental models, the highest stress was concentrated on the most distal implant and implant supporting bone on loaded side. The stress at the most distal implant-supporting bone was concentrated on the cortical bone. In all anchorage system without palatal coverage of denture base, higher stresses were concentrated on the most distal implant and implant supporting bone on loaded side. CONCLUSION. It could be suggested that when making maxillary implant retained overdenture, using Hader bar instead of milled bar and full palatal coverage rather than partial palatal coverage are more beneficial in distributing the stress that is applied on implant supporting bone.

• PNF and Movement
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• 제17권1호
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• pp.81-92
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• 2019

Purpose: This study was an investigation of the effect of unstable supporting exercise in young adults with functional ankle instability. The study tested the use of a jumper and virtual reality (VR) training via a VR-head mounted display (HMD) system to provide functional improvement in proprioception, range of motion (ROM), ankle muscle strength, agility, and balance. Methods: The subjects comprised 61 young adults (in their twenties) with functional ankle instability to decide as less than 24 points using Cumberland ankle instability tool. The subjects were divided into three groups: VUS (VR-HMD and unstable supporting exercise, n = 20), VSS (VR-HMD and stable supporting exercise, n = 19), and NUS (non-VR-HMD and unstable supporting exercise, n = 22). The exercise program was conducted three times per week for three weeks. VR training via a VR-HMD system and a VR application on a smart mobile device were used with the VUS and VSS groups, and unstable supporting exercise was used in the VUS and NUS groups for 30 minutes. Proprioception, ROM, ankle muscle strength, agility, and balance were measured before and after training. Results: The VUS group showed significant differences in most results, including proprioception, ROM, ankle muscle strength, agility, and balance to compare before and after, and the VSS and NUS groups partially. Moreover, the VUS group had significant differences in most results when compared with the other groups. Conclusion: Unstable supporting exercise and VR training via a VR-HMD system improved functional ankle instability in terms of proprioception, ROM, ankle muscle strength, agility, and balance.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 춘계학술논문 발표대회
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• pp.13-17
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• 2007

The green roof industry have been developed with Europe, North America, Japan. At the same time, being recognized the important of green roofs in domestic industry and we just start to develop the relative technology as analyzing the future direction of advanced technology. Recently, local self-government including Seoul support the system for green roof which provide 50% of working expenses form of Matching Fund by Seed Money. As years go by, the number of build up the green roof has gradually increased to be proved. At this result caused by management of system in government, unstructured construction system, low development of support technology. In this study as analyzing the present of technical development, supporting by law and system for the advanced waterproofing and root penetration resistance technology, we suggest the development direction of it to be compared with application advanced technology and we could strengthen the international competitiveness to be industrialized the green roof considering system, technology, human infrastructure.

• 해양환경안전학회지
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• 제10권1호
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• pp.23-28
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• 2004

지금까지 정부는 안전관리체제의 구축과 정착을 위해 다각적으로 사업을 추진하여 왔다. 이제는 기업에서 회사 실정에 맞게 안전관리체제가 잘 운영되고 있는 지를 자체 진단하고 평가하는 과정이 필요하겠다. 따라서 이 연구에서는 안전관리체제를 모니터링하고 운영성과를 평가할 수 있는 모형 개발과 안전관리체제를 운영할 수 있는 실행지원 모듈 개발 방향을 제시하였다. 또한 주로 사용하게 될 경영과학 분야의 주요 의사결정 방법 하나인 AHP 기법을 검토했다.

• Structural Engineering and Mechanics
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• 제50권6호
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• pp.797-816
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• 2014

Cooling tower is analyzed as an assembly of layered nonlinear shell elements. Geometric representation of the shell is enabled through layered nonlinear shell elements to define the different layers of reinforcements and concrete by considering the material nonlinearity of each layer for the cooling tower shell. Modal analysis using Ritz vector analysis and nonlinear time history analysis by direct integration method have been carried out to study the effects of the inclination of the supporting columns of the cooling tower shell on its dynamic characteristics. The cooling tower is supported by I-type columns and ${\Lambda}$-type columns supports having the different inclination angles. Relevant comparisons of the dynamic response of the structural system at the base level (at the junction of the column and shell), throat level and at the top of the tower have been made. Dynamic response of the cooling tower is found to be significantly sensitive to the change of the inclination of the supporting columns. It is also found that the stiffness of the structure system increases with increase in inclination angle of the supporting columns, resulting in decrease of the period of the structural system. The participation of the stiffness of the tower in structural response of the cooling tower is fund to be dependent of the change in the inclination angle and even in the types of the supporting columns.

• Journal of Mechanical Science and Technology
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• 제20권5호
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• pp.602-611
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• 2006

This paper proposes a locomotion pattern and a control method for biped robots with curved soles. First, since the contact point of a supporting leg may arbitrarily move back and forth on the ground, we derived the desired trajectory from a model called the Moving. Inverted Pendulum Model (MIPM) where the Zero Moment Point (ZMP) exists at the supporting point and can be moved intentionally. Secondly, a biped robot with curved soles is an under-actuated system since the supporting point contacting with a point on the ground has no actuator during the single supporting phase. Therefore, this paper proposes a computed-torque control for this under-actuated system using decoupled dynamic equations. A series of computer simulations with a 7-DOF biped robot with curved soles shows that the proposed walking pattern and control method are effective and allow the biped robot to walk fast and stably, and move more like human beings. Also, it is shown that the curved sole shape has superior energy consumption compared to flat soles, and greater efficiency in ascending and descending the stairs.

• 한국콘텐츠학회논문지
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• 제20권2호
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• pp.197-202
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• 2020

창업보육센터는 창업 기업들에게 기술적인 지원에서부터 인적지원까지 다양한 서비스를 제공하는 중요한 역할을 하고 있다. 본 연구는 제조업 창업 기업에 초점을 맞추어 창업보육센터에서 제공하는 서비스 중에서 연구개발 지원과 양산 지원이 창업자의 실무 및 창업 경험과 기업의 성과 사이에 조절역할을 하는지에 대해 실증적인 연구를 실행하였다. 이를 위해 전국의 창업보육센터에 입주한 창업 기업들의 최고경영자들로부터 얻은 총 201부의 설문을 분석하였다. 이를 통해 창업보육센터의 양산 지원과 창업자의 창업 경험이 기업 성과에 유의한 조절효과를 보이는 가설이 채택되었다. 본 연구의 결과를 바탕으로 시사점을 제공하였다.