• 한국해양공학회:학술대회논문집
• /
• 한국해양공학회 2004년도 학술대회지
• /
• pp.96-100
• /
• 2004

In the ship building industry various problems of erection is counterfeited due to formation of bottle necks in the block erection flow pattern This kind of problems cause accumulated problems in real-time erection right on the floor, When such a problem is approached, a support data of the entire erection sequence should be available, Here planning is done by reasoning about the future events in order to verify the existence of a reasonable series of actions to accomplish a goal. This technique helps in achieving benefits like handling search complications, in resolving goal conflicts and anticipation of bottleneck formation well in advance to take necessary countermeasures and boosts the decision support system, The data is being evaluated and an anticipatory function is to be developed This function is quite relevant in day to day planning operation. The system updates database with rearrangement of off-critical blocks in the erection sequence diagram, As a result of such a system, planners can foresee months ahead and can effectively make decisions regarding the control of loads on the man, machine and work flow pattern, culminating to an efficient load management. Such a foreseeing concept helps us in eliminating backtracking related adjustment which is less efficient compared to the look-ahead concept. An attempt is made to develop a computer program to update the database of block arrangement pattern based on heuristic formulation.

• 대한산업공학회지
• /
• 제20권4호
• /
• pp.85-97
• /
• 1994

An interactive and iterative control panel layout method based on the constraint satisfaction problem (CSP) technique was developed to generate an ergonomically sound panel design. This control panel layout method attempts to incorporate a variety of relevant ergonomic principles and design constraints, and generate an optimal or, at least, a "satisfactory" solution through an efficient search algorithm. The problem of seeking an ergonomically sound panel design should be viewed as a multi-criteria design problem and most of the design objectives should be understood as constraints. Hence, a CSP technique was employed in this study for dealing with the multi-constraints layout problem. The efficient search algorithm using "preprocess" and "look_ahead" procedures was developed to handle vast amount of computation. In order to apply the CSP technique to the panel layout procedure, the ergonomic principles such as spatial compatibility, frequency-of-use, importance, functional grouping, and sequence-of-use were formalized as CSP terms. The effectiveness of the proposed panel layout method was evaluated by example problems and the results clearly showed that the generated layouts properly considered various ergonomic design principles.

• 한국자동차공학회논문집
• /
• 제8권6호
• /
• pp.194-207
• /
• 2000

In this paper, we suggest a vision-based lane change control system, which can be applied on the straight road, without additional sensors such as a yaw rate sensor and a lateral accelerometer. In order to reduce the image processing time, we predict a reference line position during lane change using the lateral dynamics and the inverse perspective mapping. The sliding mode control algorithm with a boundary layer is adopted to overcome variations of parameters that significantly affects a vehicle`s lateral dynamics and to reduce chattering phenomenon. However, applying the sliding mode control to the system with a long sampling interval, the stability of a control system may seriously be affected by the sampling interval. Therefore, in this paper, a look ahead offset has been used instead of a lateral offset to reduce the effect of the long sampling interval due to the image processing time. The control algorithm is developed to follow the desired trajectory designed in advance. In the design of the desired trajectory, we take account of the constraints of lateral acceleration and lateral jerk for ride comfort. The performance of the suggested control system is evaluated in simulations as well as field tests.

• 한국수학사학회지
• /
• 제25권1호
• /
• pp.15-27
• /
• 2012

16세기 후반과 17세기 전반에 활동했던 영국의 과학자이자 수학자인 Thomas Harriot은 대수기호를 독창적으로 만들어 사용하였고 일부는 오늘날에도 사용하고 있다. 또한 방정식에서 음수근 뿐만 아니라 복소수근도 받아들였는데 그의 이러한 관점은 당시로는 혁신적이었으며 나아가 방정식의 형태의 일반화에도 진일보한 모습을 보여주었다. 사후 유작 외에는 생전에 수학 저서가 한 권도 없는 탓에 Harriot 개인이나 그가 이루어 놓은 수학이 수학적 성취에 비하여 수학사나 수학교육에서 그에 대하여 소홀히 다루어진 감이 있다. 이 논문에서는 동시대 유명한 수학자였던 비에타와 데카르트의 대수기호와 방정식론을 비교함으로써 Harriot이 이루어놓은 수학을 알리고자 한다.

• Journal of Communications and Networks
• /
• 제9권4호
• /
• pp.457-465
• /
• 2007

Native information provider(IP) anycast suffers from routing scalability issues and the lack of stateful communication support. For this reason, we propose architecture for scalable and transparent anycast services(ASTAS), a proxy-based architecture that provides support for stateful anycast communications, while retaining the transparency offered by native anycast. Dynamic resource assignment for each initiated session guarantees that a connection is established with the most suitable target server, based on network and server conditions. Traffic engineering in the overlay can be realized in an effective way due to the dissemination of aggregated state information in the anycast overlay. To minimize the total deployment cost for ASTAS architectures, we propose optimized proxy placement and path finding heuristics based on look-ahead information gathered in network nodes. Contrary to a regular integer linear program(ILP) formulation, these heuristics allow to optimize proxy placement in large networks. A use case on a European reference network illustrates that lower proxy costs enable proxy deployment closer to the end-users, resulting in a reduced network load.

• Ocean and Polar Research
• /
• 제32권3호
• /
• pp.267-268
• /
• 2010

Many countries has been interested in studying the East Sea to look ahead into the world oceans' future, since the East Sea has been known as a miniature ocean. In this respect, PICES decided the East Asian Seas Time-series (EAST) studies, and the East Sea as the first subject (EAST-I). Since 2006 Ministry of Land, Transport & Maritime Affairs, Korea has supported the Korean EAST-I program. Through the Korean EAST-I program, 44 research papers were published in various scientific journals. This special issue contains 6 research articles including results from the interdisciplinary observation in the summer, 2008. Those articles cover the entire East Sea from the Korea Strait to the Japan Basin, and also cover the studies of the euphotic layer to the bottom sediment. MLTM and KIMST have provided full support to EAST-I program. KHOA carried out the joint cruises in the Ulleung Basin. Those are deeply appreciated. Finally, we would like to express our gratitude to the editorial board of Ocean & Polar Research.

• 한국기술혁신학회:학술대회논문집
• /
• 한국기술혁신학회 2005년도 춘계학술대회
• /
• pp.46-59
• /
• 2005

After the IMF jurisdiction period, the Korean economy experienced a venture boom. Korean venture enterprises had been recognized that high profitable and high technology capacity based. These ventures also have contributed to national added value tolerably. In particular, Korean information technology (IT) venture companies got away the order of economy concentrated big companies, which were taken the opportunity of new economy to make suggestion of the future courses and to open an e-Korea era. However, IT ventures firms or dotcom enterprises have had difficulties through sinking down their bubbles and slumping technology sector from the first half of the 2000. In consideration of Korea IT venture companies' conditions, Korean government introduce new national vision in order to go ahead of intelligence based society form knowledge based. Korea is planning new investment to meet with the challenge of globalization proactively by national band named u-Korea. As following a step in IT infrastructure, it will give Korean IT ventures new demand creative technologies and services by new technological windows of opportunity. This situation is expected that will become an economic take-off. This paper will look for the way to stimulate Korean IT ventures' competence and present new frontier of IT ventures turnaround.

• Journal of Information Technology Applications and Management
• /
• 제28권3호
• /
• pp.23-30
• /
• 2021

Korea currently provides long-term care benefits for the elderly with poor functionality, but most of the service providers are private businesses. This is the time when quality management of care services is required, which is just around the corner of the super-aged era. In this study, we would like to look at the case in which 'A company', which operates a long-term care institution, attempted to make voluntary changes ahead of social demands. The company tried to transform the social needs of quality management by judging them as opportunities, not threats, and establishing an integrated database of centers. First, the company processed data and built a cloud-based database system. Second, the company automatically linked data from existing systems for the efficiency of data utilization. Third, the company pursued visualization for the convenience of data utilization. This allowed the company to make data-driven strategic decisions internally. This is expected to increase sales as it will soon lead to securing new customers and pioneering new markets. It is also significant in that it can provide best practices for the long-term care industry.

• 국제학술발표논문집
• /
• The 6th International Conference on Construction Engineering and Project Management
• /
• pp.328-332
• /
• 2015

By logging position data from GPS-equipped construction machines, we re-create daily activities as 3D animations to analyze performance and facilitate look-ahead scheduling. The 3D animation enables going back to any point in time and space to observe the activities as they took place. By segmenting data into a set of activities, it is possible to obtain actual measures of performance such as cycle times, production, speed profiles and idle times. The measures of performance can then be compared to those expected (e.g., theoretical speed profiles vs. observed profiles), and instances of significant difference can be flagged for further investigation. Idle times and queues that exceed prescribed thresholds can also be identified. In general, many of the traditional real-time performance analyses can be performed after the fact. Situations of interest can be identified automatically and the events in this manner enhances effective performance improvement in construction. The proposed research is explained and demonstrated using a real push-loaded earthmoving operation.

• 한국보육지원학회지
• /
• 제9권5호
• /
• pp.131-156
• /
• 2013

본 연구는 유아부모의 양육신념과 양육태도 및 양육행동의 각 변인들의 중요성에 관한 충분한 이해와 또한 이들 간의 관련성을 살펴보고, 이를 통해 유아의 흥미와 관심, 강점과 약점 등 유아의 구체적인 욕구를 중심으로 유아의 다중지능 경험을 보다 통합적으로 실천할 수 있는 기반을 마련하고자 하였다. 이를 위해 유아부모들을 대상으로 설문조사를 실시하고, 변인 간의 관계를 알아보기 위하여 다중회귀분석을 실시하였다. 그 결과, 첫째, 유아의 성별에 따른 다중지능의 차이를 살펴본 결과, 유아의 성별구분에 따라 언어지능, 음악지능, 논리수학지능, 공간지능에서 유의미한 차이가 있는 것으로 나타났으며, 언어지능, 음악지능, 공간지능은 여아가 높은 수준을 나타냈으나 논리수학지능은 남아가 높은 수준으로 나타났다. 둘째, 유아 연령에 따른 다중지능의 차이를 살펴본 결과, 유아의 연령구분에 따라 전체 다중지능가운데 논리수학지능, 신체운동지능, 자연지능에서 만 5세 유아가 만 4세 유아와 비교하여 높은 수준을 보여주었다. 셋째, 유아부모의 양육신념, 양육태도, 양육행동이 유아 다중지능의 각 하위변인에 미치는 상대적 영향력을 알아보기 위한 중다회귀분석 결과, 전체적으로 유아 다중지능의 가장 큰 변인은 유아부모의 양육태도였으며, 그 다음이 유아부모의 양육행동이었으며, 양육신념은 극히 영향력이 적은 것으로 나타났다. 따라서 본 연구는 유아의 다중지능을 향상시키기 위하여 부모의 양육태도 및 양육행동을 증진시킬 수 있는 다양한 지원이 요구됨을 알 수 있다.