• The Journal of Korean Association of Computer Education
• /
• v.13 no.5
• /
• pp.29-38
• /
• 2010

In this study we developed an ontology-based e-learning system for supporting self-directed learning. In this system, a domain ontology of a learning topic was constructed and relation properties were defined to indicate the relations among the learning concepts. The learning concepts and their relationships are structured visually through the domain ontology. It also boosts understandabilities of students by means of the visualization of relationships among the pre and post concepts. In addition, the system provides reasoning so that learners can do intelligent query when they want to learn more or they are curious about the high-level knowledge while they are learning a topic. These features of the system would help learners' self-directed and active learning.

• International Commerce and Information Review
• /
• v.9 no.1
• /
• pp.451-465
• /
• 2007

It is true that every country which includes the developing country has planned own economic development through government subsidies. Korea also has developed their some major industry through supporting government subsidies. Under the WTO structure, however, government's specific supports for export firms come under prohibited subsidy and subsidy supporting must be based on WTO ASCM(Agreement on Subsidies and Countervailing Measures). The purpose of this paper was to study on the WTO ASCM and to analyze cases on the shipbuilding and Hynix DRAM dispute which Korean concerned major subsidy issue. Korea has been undergoing subsidy dispute with EU and U.S.A. concerned matter of shipbuilding and Hynix DRAM respectively. From this research results were as follow : First of all, the WTO ASCM introduced a definition of subsidy and divided subsidies into three categories and was legally bound through dispute settlement mechanism and implemented by all WTO members. Also, through analyzing cases, results were indicated that Korea wins a lawsuit against the matter of shipbuilding subsidy whereas losing the lawsuit against the matter of DRAM subsidy. It means that the case of shipbuilding subsidy do not violation WTO ASCM and the case of Hynix DARAM is against WTO ASCM. Additionally, as we see the dispute cases concerned Korean industry, it is necessary that government should operate subsidies which were provided for certain governmental policy as consisted with WTO ASCM.

• Journal of the Society of Naval Architects of Korea
• /
• v.52 no.4
• /
• pp.298-304
• /
• 2015

Shipboard equipment in naval ships should be designed to be safe under the shock load. Very high stress due to the shock load can be effectively reduced by the resilient mounts considering the mount capacity and dynamic characteristics. An optimum arrangement of resilient mount installed to absorb the shock energy is addressed to assess the safety of ship structure and shipboard equipment subjected to the shock load. Structural responses are analyzed for both frame structure supporting the shipboard equipment subject to the shock load with and without the resilient mounts. The shock absorbability of the resilient mount is evaluated by the results of structural response analysis; meanwhile, several types of shock analyses considering the arrangement of resilient mounts are carried out and the shock responses are compared to verify the effect of the arrangement. Thereafter, optimum arrangements are obtained by means of Genetic algorithm (GA) considering the different capacities of resilient mount. Stress, deformation and dynamic feature at the frame structure supporting the shipboard equipment under the shock load are also discussed in order to meet the capacity of resilient mount.

• Journal of Computing Science and Engineering
• /
• v.2 no.4
• /
• pp.394-411
• /
• 2008

The data in automation and control systems can be achieved not only from different field devices but also from different OPC (OLE for Process Control) servers. However, current OPC clients can only read and decode the simple data from OPC servers. They will have some problems to acquire structured data and exchange the structured data. In addition to the large network control systems, the OPC clients can read, write, and subscribe to thousands of data points from/to OPC servers. Due to that, the most important factor for building a high performance and scalable industrial control system is the ability to transfer the process data between server and client in the most efficient and fastest way. In order to solve these problems, we propose a means to implement the OPC DA (Data Access) server supporting the OPC complex data, so that the OPC DA clients are able to read and decode any type of data from OPC servers. We also propose a method for caching the process data in large industrial control systems to overcome the limitation of performance of the pure OPC DA system. The performance analysis and discussion indicate that the proposed system has an acceptable performance and is feasible in order for applying to real-time industrial systems today.

• Korean Journal of Computational Design and Engineering
• /
• v.4 no.4
• /
• pp.339-349
• /
• 1999

The punose of this paper is to introduce the comprehensive CAM system (called PosCAM) supporting various function requested from shop floor operators. PosCAM is comported of two subsystems (PosCAM I and PosCAM II) which are designed to make up for the contemporary CAD/CAM systems. PosCAM I is mainly for : a) verifying the part programs written in both custom macros and standard G-codes, b) enhancing machining productivity and quality with built-in cutting conditions and feedrate optimization algorithm. PosCAM II is for : a) efficiently managing the numerous part programs and tool data stored in CNC memory, and b) integratively controlling and monitoring various CNCs from the control center through RS-422 with DNC 2 protocol. The developed systems have been tested via various experiments, and can be Applied for the industrial CNC machine shop as a means for enhancing productivity. The PosCAM system has been implemented and successfully used in the Machine Shop Department of PosCAM since march 1998.

• Plant Journal
• /
• v.8 no.2
• /
• pp.52-58
• /
• 2012

Pipe means the connection of the tube in order to transfer fluid from one device to another device. The piping stress analysis is to analyze the structural stability considering the location and the features of piping support after completing the piping design, The allowable stresses comply with the requirements of the relevant standards by examining whether the support of the function and location of pipe or re-operation is confirmed. Allowable stresses are to make sure that the maximum stress should not exceed the allowable stress presented in the ASME B31.1 POWER PIPING code. ASME B31.1 POWER PIPING code ensures a smooth stress analysis can be performed during the initial pipe stress analysis as provided in the case of straight pipe to the horizontal distance between the supports. However, because there is no criteria set in the case of curved pipe, the optimum pipe supporting points were studied in this paper. As mentioned about the curved pipe, loads applied to the support of the position of 17% and 83% of the position relative to the elbow part have results similar to the load acting on the support of straight pipe.

• International Journal of High-Rise Buildings
• /
• v.9 no.1
• /
• pp.53-60
• /
• 2020

"A practical architect might not unnaturally conceive the idea of erecting a vast edifice whose frame should be entirely of iron, and clothing the frame--preserving it--by means of a casing of stone…that shell must be regarded only as an envelope, having no function other than supporting itself..." --Viollet-le-Duc, 1868. Viollet-le-Duc's recipe for an encased iron frame foresaw the separation of structural and enclosing functions into discrete systems. This separation is an essential characteristic of skyscrapers today, but at the time of his writing cast iron's brittle nature meant that iron frames could not, on their own, resist lateral forces in tall structures. Instead, tall buildings had to be braced with masonry shear walls, which often also served as environmental enclosure. The commercial availability of steel after the 1880s allowed for self-braced metal frames while parallel advances in glass and terra cotta allowed exterior walls to achieve vanishingly thin proportions. Two Chicago buildings by D.H. Burnham & Co. were the first to match a frame "entirely of iron" with an "envelope" supporting only itself. The Reliance Building (1895) was the first of these, but the Fisher Building (1896) more fully exploited this new constructive typology, eschewing brick entirely, to become the first "building without walls," a break with millennia of tall construction reliant upon masonry

• Korean Management Science Review
• /
• v.23 no.1
• /
• pp.1-19
• /
• 2006

This study investigates the critical success factors for the promotion of IT industry in region and suggests some directions for operations strategy of them. This study based on the critical success factors, and we suggest followings : (1) start-ups support, (2) technology support, (3) management support, (4) law/institutional support. We suggested the strategy which based on critical success factors for successful operations of IT industry. This strategy suggested by AHP(Analytic Hierarchy Process) results and was evaluated by the three groups(IT firms, local government official worker, professor) which have an influence on IT policy. We suggested the priority of policy by AHP technique for successful development of IT industry. As a results, centralization of supporting facilities was perceived as the most important policy by three groups(IT firms, local government official worker, professor). This research contributes to assist planners and policy-makers in supporting IT industry by providing useful information about the suggested strategy, and by suggesting the effective means to assist the IT industry. Also, results of our research will be suggested as a priority of developing policy to assist successful IT industry.

• Research in Community and Public Health Nursing
• /
• v.24 no.1
• /
• pp.99-109
• /
• 2013

Purpose: The purpose of this study is to identify levels of quality of health-related life (EQ-5D) and its related factors among vulnerable elders receiving home visiting health care services in some rural areas. Methods: The subjects of this study were vulnerable elders aged 65 or higher receiving visiting health care benefits by a public health center in a county. Results: Levels of health-related EQ-5D were high when the subjects were males, their ADL and IADL were high. The EQ-5D of the vulnerable elders and social supports had a positive correlation, while their IADL and depression had a negative correlation with the EQ-5D. We can see that the EQ-5D related factors are variables that have significance influence on gender, subjective health status, BMI, IADL, depression levels, and social support. Conclusion: To improve the EQ-5D of the vulnerable elderly, it needs maintenance of independent IADL levels, social supporting systems using small meeting of the elderly in community. It is necessary to maintain independent IADL levels, enhance social supporting systems including small group gatherings for elders living alone by means of places like community halls, and develop specific intervention programs for the prevention and management of depressive elders.

• International conference on construction engineering and project management
• /
• 2009.05a
• /
• pp.1288-1293
• /
• 2009

Performing 'Mega Project' in which various stakeholders are involved is difficult to control due to the respective conflicting objectives. Urban regeneration which is being challenged issue in various ways can be defined as the mega project. Since the mega project like urban regeneration a long-continued project and includes a lot of participants whose benefits conflict, cooperation among stakeholders is essential. Moreover, as the project goes, diverse decision making situations which require collaboration happen, and if proper decision making cannot be given at that time, the whole project would have critical effects. Also, since each activity concerns numerous stakeholders, prompt decision making is difficult in the mega project. Therefore, the objective of this study is to support stakeholder's cooperative decision making in order for conducting successful project. For the purpose of the paper, the concept of cooperation in mega project is redefined and a cooperative decision making framework is suggested. Also, the term of governance, which means cooperative mechanism based on the mutual trust, information sharing and partnership, is applied to the newly defined cooperation. The suggested cooperative decision making framework contains the structure of stakeholders in urban regeneration project which enables participants to understand the relationship among bodies and checklists for supporting decision making appropriately. The application of the framework proposed in this research is expected to contribute subjects' suitable decision making by providing proper information in a timely manner.