• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.797-800
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• 2007

Value Engineering(VE) is being applied as an useful tool to eliminate the waste of cost and noneffective factors previously in construction projects. Ministry of construction and transportation' has been accordingly enforcing extensionally design phase VE to the construction costing more than 10 billion won, an importance of design phase VE. Although there are legal supports and technical effects, an effect about an introduction of design phase VE can not be applied properly because of several problems at the process. So, in this study, try to find out competency factors of design phase VE to enforce a competency of VE team as a basic database for developing a check list, and estimate weight. For the result, find out a competency evaluation item and organize as a team knowledge, a team work skill and a team attitude. Perform a first survey to verify a reliability and propriety regarding the found competency evaluation, perform the second survey competency as to evaluation item of the found 1, 2, 3 class and then estimate the weight by AHP.

• KIEAE Journal
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• v.10 no.5
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• pp.165-170
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• 2010

Super high-rise mixed use buildings require a longer period for construction. Especially finishing work takes up about 40% of the whole construction period. Thus, finishing work is becoming an important factor in determining the construction period along with earth work and frame work. As the expected returns added by the reduction of the period and cost in constructing super high-rise mixed use buildings are huge, the expectations are now increasing for the possible gains. In this respect, as the period of finishing work is easier to be shortened than that of frame work, the efforts to acquire the technical knowledge to reduce the finishing work period are now being required. Accordingly, in this study, we aimed at suggesting the basic data for designing an economic plan for finishing-work procedure by analyzing the productivity of each work type of finishing work procedure on the basis of the execution and results of a construction method as a time-flexible finishing work plan. For this, we categorized the work types of finishing work procedure into each work unit and provided a work-system for each of them. Also, with case studies, we calculated the detailed amounts of the work-loads, required materials, productivity, and productivity index of the main work types of finishing work procedure and each of their separate work units as well as analyzed the relationship between the value results to suggest a better way to improve its productivity.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.7
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• pp.1491-1497
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• 2003

The improvement of abilities of utilizing information as well as the education of information is coming to the fore as a really significant matter for students living in knowledge and information-oriented society of the 21st century. In this respect, this study aims to develop a teaching and learning model for technical high school students who need mon desire and comprehensive faculty of their learning and to testify its efficiency by relating their abilities of using in with their curriculum. We propose a teaching and learning model, LT&T, which lets the students have academic interests and perform continuously learning activities by helping students themselves to find their achievements of learning and their learning ability. The LT&T teaching and learning model, proposed in this paper, is developed by combining LT and Tournaments, and it enhances individual several intellectual powers, and also activates the academic interests to increase the effects of learning. After we had a class using the LT and the LT&T, we conducted a sample survey of which results show that learning effects of LT&T is better than that of LT by students of more 80%.

• Journal of Information Processing Systems
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• v.14 no.4
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• pp.1049-1061
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• 2018

As mobile devices such as smartphones and tablet PCs become more popular, users are becoming accustomed to consuming a massive amount of multimedia content every day without time or space limitations. From the industry, the need for user satisfaction investigation has consequently emerged. Conventional methods to investigate user satisfaction usually employ user feedback surveys or interviews, which are considered manual, subjective, and inefficient. Therefore, the authors focus on a more objective method of investigating users' brainwaves to measure how much they enjoy their content. Particularly for multimedia content, it is natural that users will be immersed in the played content if they are satisfied with it. In this paper, the authors propose a method of using a portable and dry electroencephalogram (EEG) sensor device to overcome the limitations of the existing conventional methods and to further advance existing EEG-based studies. The proposed method uses a portable EEG sensor device that has a small, dry (i.e., not wet or adhesive), and simple sensor using a single channel, because the authors assume mobile device environments where users consider the features of portability and usability to be important. This paper presents how to measure attention, gauge and compute a score of user's content immersion level after addressing some technical details related to adopting the portable EEG sensor device. Lastly, via an experiment, the authors verified a meaningful correlation between the computed scores and the actual user satisfaction scores.

• The Journal of the Korea Contents Association
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• v.8 no.2
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• pp.132-139
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• 2008

The aim on this thesis is to develop virtual construction designing experience web-site in order to help non-professional to predict the actual construction working result by self-construction design, provided by virtual reality program, sharing knowledge of architectural design and materials on internet to solve certain problems. The way of study is using case of virtual reality technology which is practically using in architecture era recently; in construction design, deducting realizable virtual reality technology of limitation and its solution; analyze case of construction designing program which is currently used by professionals; constitute required essential functions as UI(User Interface) when constructing. Followed by result of study, as a proposal, in service, technical, and UI sectors are the way to construct its objectives for internet based virtual construction experience web-site.

• Journal of Practical Engineering Education
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• v.8 no.2
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• pp.91-94
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• 2016

This study is focused on the development and application of automotive lighting system simulator device to help understanding of the repair and overhaul, electrical instrumentation and automotive circuit checks the contents of the automotive electrical system. The purpose of this study is to define the circuit numeracy, circuit repair preparation skills, detachable power, circuit analysis capabilities, inspection and measurement capability, and repair (problem solving) skills, through the cultivation of clean ability to increase the understanding of electrical equipment maintenance circuitry to verify the improvement of the repair. Automotive electrical device requires understanding of the invisible parts, and understanding of the various symbols and complex circuitry to measure the basic checks and repair are indispensable. This paper would likely contribute to help students to gain more interest in the fields that they feel difficult such as basic skills which necessary to cultivate a variety of electrical equipment fault diagnosis of the basic knowledge needed for electric cars practical.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.7
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• pp.1696-1701
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• 2009

In this paper we analyzed the management performance as the result of the korean government's support policy for the small and medium sized business (SMB). The governmental support policy was carried out for the companies classified in 3 criterion. The first is the upbringing of dynamic SMB group, which are driven by creativity and innovation. The second is the enforcement of technology-innovation and cooperation for SMB. The last is the establishment of the growth basis for SMB like funds, human resources and distribution channels. After categorization of above 3 classes, the affect of support policy on the management performance is analyzed, in terms of 3 aspects, management performance, technical performance and policy satisfaction. This study shows that the governmental support policy has the remarkable effects on the financial support sector of SMB. The 5 major sectors, 1) the upbinging of venture-innobiz innovation company, 2) rearing funds of knowledge-based service company, 3) R&D support, 4) support of management stability fund, 5) expansion of distribution channel to the public sector, are designed from 24 variables. The 3 sectors of these 5 are have the main influences from governmental support policy.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.8
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• pp.1998-2004
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• 2009

Recently, due to technical developments of various storage devices and networks, the amount of data increases rapidly. The large volume of data streams poses unique space and time constraints on the data mining process. The continuous characteristic of streaming data necessitates the use of algorithms that require only one scan over the stream for knowledge discovery. Most of the researches based on the support are concerned with the frequent itemsets, but ignore the infrequent itemsets even if it is crucial. In this paper, we propose an efficient method WSFI-Mine(Weighted Support Frequent Itemsets Mine) to mine all frequent itemsets by one scan from the data stream. This method can discover the closed frequent itemsets using DCT(Data Stream Closed Pattern Tree). We compare the performance of our algorithm with DSM-FI and THUI-Mine, under different minimum supports. As results show that WSFI-Mine not only run significant faster, but also consume less memory.

• Nuclear Engineering and Technology
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• v.35 no.4
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• pp.318-335
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• 2003

Expert judgment is frequently employed in the search for the solution to various engineering and decision-making problems where relevant data is not sufficient or where there is little consensus as to the correct models to apply. When expert judgments are required to solve the underlying problem, our main concern is how to formally derive their technical expertise and their personal degree of familiarity about the related questions. Formal methods for gathering judgments from experts and assessing the effects of the judgments on the results of the analysis have been developed in a variety of ways. The most important interest of such methods is to establish the robustness of an expert's knowledge upon which the elicitation of judgments is made and an effective trace of the elicitation process as possible as one can. While the resultant expert judgments can remain to a large extent substantiated with formal elicitation methods, their applicability however is often limited due to restriction of available resources (e.g., time, budget, and number of qualified experts, etc) as well as a scope of the analysis. For this reason, many engineering and decision-making problems have not always performed with a formal/structured pattern, but rather relied on a pertinent transition of the formal process to the simplified approach. The purpose of this paper is (a) to address some insights into the balanced use of formally structured and simplified approaches for the explicit use of expert judgments under resource constraints and (b) to discuss related decision-theoretic issues.

• Journal of the Korean Society for Precision Engineering
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• v.11 no.4
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• pp.77-87
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• 1994

This paper deals with an automated forming sequence design system by which designers can determine desirable operation sequences even if they have little experience in the design of cold forging process. The forming sequence design in the cold forging is very important and requires many kinds of technical and empirical knowledge. They system isproposed, which generates forming sequence plans for the multistage cold forging of axisymmtrical solid products. Since the process of metal forming can be considered as a transformation of geometry, treatment of the geometry of the product is a key in planning process. To recognize the geometry of the product section, section entity representation and primitive geometries were used. Section entity representation can be used for the calculation of maximum diameter, maximum height, and volume. Forming sequence for the part can be determined by means of primitive geometries such as cylinder, cone, convex, and concave. By utilizing this geometrical characteristics (diameter, height, and radius), the product geometry is expressed by a list of the priitive geometries. Accordingly the forming sequence design is formulated as the search problem which starts with a billet geometry and finishes with a given product one. Using the developed system, the sequence drawing with all dimensions, which includes the proper sequence of operations for the part, is generated under the environment of AutoCAD. Based on the results of forming sequence, process variables(strain, punch pressure, die inner pressure, and forming load) are determined.