• The Research Journal of the Costume Culture
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• v.11 no.6
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• pp.867-878
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• 2003

The purpose of this study is to provide basic data for improvement in worker's uniform in both scientific and efficient ways. To make this procedure right, we brought the focus of the study into the present condition of working uniform in various machinery plants. The study was enforced by questionnaire and personal interview. The subjects of the survey were the 264 workers working in mechanical industry in Seoul. The results obtained from the researches by methods above are as follows. The level of satisfaction, on the whole, with their uniforms failed to reach the average level with the result of 2.97. The reason would be they have not been very contented with colors and materials. The level of satisfaction of color was only 2.76, far less reaching the average score 3. In detail, they complained color is dull, dark, too much solid and outdated. Surprisingly, the level of satisfaction with materials turned out to be really low as the materials used get dirty easily, doesn't draw moisture away from the skin quickly transport to surface making wearer more comfortable and doesn't have plenty of air moving out. According to statistics of population, the level of satisfaction of uniform on the whole differed from the point of age, gender, categories of industry, one's professional experience and income level.

• Journal of The Korean Digital Architecture Interior Association
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• v.11 no.3
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• pp.89-97
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• 2011

Accelerating economic growth since the 1960s, penetration rate of the House of Commons has been increased. However, design competition has been imposed for improve of the qualitative level in modern because it was quantitative increasing. Even though its design quality is improved by introducing design competition, distorting the design is increased for the purpose of election. For that reason, errors of information and design changes are increased. So BIM(Building Information Modeling) is adopted to solve the problems. In this study, BIM process on the basis of the existing design process was to clean up and LoI(Level Of Information) based on the level of information was newly defined. Working-level of the design competition is plan-basic design. LOI level is LOI1-LOI2 in plan and Lol3-LOI4 in basic design. At each step of the operation was to clean up the level of detail and content. Also exchange of data in each area and feedback about content are to clean up.

• Ocean Systems Engineering
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• v.2 no.1
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• pp.1-16
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• 2012

Offshore wind turbines are complex structural and mechanical systems located in a highly demanding environment. This paper proposes a multi-level system approach for studying the structural behavior of the support structure of an offshore wind turbine. In accordance with this approach, a proper numerical modeling requires the adoption of a suitable technique in order to organize the qualitative and quantitative assessment in various sub-problems, which can be solved by means of sub-models at different levels of detail, both for the structural behavior and for the simulation of loads. Consequently, in a first place, the effects on the structural response induced by the uncertainty of the parameters used to describe the environmental actions and the finite element model of the structure are inquired. After that, a meso-level FEM model of the blade is adopted in order to obtain the detailed load stress on the blade/hub connection.

• Journal of Electrical Engineering and Technology
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• v.13 no.1
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• pp.152-159
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• 2018

In this paper, a novel topology of two-level voltage-type inverter is proposed. The proposed inverter has three bridge arms while each bridge is made up of two thyristors, one IGBT and four diodes. Thyristors complete the phase positioning of the inverter, IGBT completes the modulation of different modulation modes such as SPWM, SVPWM, and SHPWM, and the diodes complete the commutation of the bridge arms. Compared to the traditional voltage-type inverter with six IGBTs, the proposed voltage-type inverter using three IGBTs can achieve the same function with highly reduced cost. The principle of the proposed two-level inverter is explained in detail. The simulation and experiment results demonstrate the performance and effectiveness of the proposed inverter-type inverter.

• International conference on construction engineering and project management
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• 2015.10a
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• pp.263-267
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• 2015

Stakeholders of a construction project expect cost savings through fast and accurate cost analysis by performing BIM-based quantity take-off (BQT). However, authors have observed that there can be discrepancies in the results of BQT depending on the level of development (LOD) and modeling methods. In addition, since quantity take-off methods are different depending on the construction work items, the combination of LOD, modeling methods of BIM, features of construction work items can cause serious overestimate or underestimate in BQT results. It is necessary to identify what kind of problems can happen and how those problems can be avoided in various construction work items, since the discrepancy of quantity take-off results has great impact on not only cost analysis but also the determination of contract amount and it can cause claims, poor construction quality, cost overruns, and many others later in the construction project. Therefore, this paper focuses the identification of issues and problems of BQT at each construction work item level based on two categorizations of structural works and interior works.

• Structural Engineering and Mechanics
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• v.64 no.1
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• pp.93-107
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• 2017

The article presents the vibration and acoustic responses of un-baffled doubly curved laminated composite panel structure under the excitation of a harmonic point load. The structural responses are obtained using a simulation model via ANSYS including the effect various geometries (cylindrical, elliptical, spherical and hyperboloid). Initially, the model has been established by solving adequate number of available examples to show the convergence and comparison behaviour of the natural frequencies. Further, the acoustic responses are obtained using an indirect boundary element approach for the coupled fluid-structure analysis in LMS Virtual.lab by importing the natural frequency values. Subsequently, the values for the sound power level are computed using the present numerical model and compared with that of the available published results and in-house experimentally obtained data. Further, the acoustic responses (mean-square velocity, radiation efficiency and sound power level) of the doubly curved layered structures are evaluated using the current simulation model via several numerical experimentations for different structural parameters and corresponding discussions are provided in detail.

• Journal of Computational Design and Engineering
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• v.2 no.2
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• pp.73-78
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• 2015

In this paper, we propose a new approach to providing interactive and collaborative lens among multi-users for supporting level-of-detailed views using smartphones in a public display. In order to provide smartphone-based lens capability, the locations of smartphones are effectively detected and tracked using Kinect, which provides RGB data and depth data (RGB-D). In particular, human skeleton information is extracted from the Kinect 3D depth data to calculate the smartphone location more efficiently and correctly with respect to the public display and to support head tracking for easy target selection and adaptive view generation. The suggested interactive and collaborative lens using smartphones not only can explore local spaces of the shared display but also can provide various kinds of activities such as LOD viewing and collaborative interaction. Implementation results are given to show the advantage and effectiveness of the proposed approach.

• Journal of Korea Planning Association
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• v.53 no.7
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• pp.67-86
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• 2018

This paper attempted to analyze impacts of transition in electricity generation system on a national economy and environmental level in Korea using a recursive computable general equilibrium(CGE) model. In particular, the paper presented a hybrid model combining the top-down CGE model with the bottom-up model which describes the structure of electricity production in detail. The impacts were analyzed by two policy scenarios base on the basic plan for electricity supply and demand proposed by the Korean government. As a result, the paper specifically showed that there exists a trade-off relationship in the policy-making between economic efficiency and environmental level. The paper also suggested that the transition in electricity generation system should be done more gradually and carefully.

• IEMEK Journal of Embedded Systems and Applications
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• v.6 no.2
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• pp.86-92
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• 2011

In this paper, we proposed a level 2 middleware with common services for controlling steel plants, which is named POSMOS. POSMOS supports eight middleware services currently, but, this paper described in detail two representative services of the common services: file service and external communication service and their respective measured performance. In the experiment section, we described the performance of the two representative services and a case using our middleware which shows better response time than the existing commercial middleware by about 32%.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.8 no.1
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• pp.55-95
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• 1997

This paper examines the characteristics of 23 libraries affiliated with educational institutions of the Korean miltary. Materials and data used in this analysis were obtained from a variety of statute books, Korean Library Association publications, past works in military-related research, questionnaires and interviews with library staff. For each military educational institutions, the background to its foundation and Its current operations are briefly reviewed. Library characteristics subjected to analysis pertain to the following 8 areas： location and architecture, stack arrangement, furniture and furnishings, personnel, service elements, budget, book stock, and extent of computerization. The affiliated library (consisting of reading rooms and/or stack rooms) is then classified as belonging to one of the following three levels: graduate-school level (total of 4 libraries), university level (5 libraries), and technical-school level (14 libraries). When necessary. particular libraries are examined in detail. This research reveals that while most graduate-school and university level libraries are being operated on a relatively sound basis, there are significant disparities among university level libraries. As for technical-school level libraries, the lack of professional staff and service elements for users is seriously impairing their operations. In order to address these problems and support military education and research in the age of segyehwa and information, it is suggested that the Korean military formulate comprehensive measures to modernize library facilities and improve their operations.