• Journal of the Korea society of information convergence
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• v.7 no.1
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• pp.47-53
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• 2014

This study was carried out recognition and status changes of optician for glasses fitting. It based on a survey results of twice in relation to the glasses fitting. The results are as follows. The ratio of glasses fitting about optician operation appeared to increase gradually. The positive awareness change appeared from the customer and optician about the cost charging about the glasses fitting. In the case of a plastic glasses, the burden for the inconvenience feeling and fitting frequency showed an increase with relation to the temple fitting. To reduce the burden of glasses fitting, The continuous education for the correct glasses usage need.

• Journal of The Korea Institute of Healthcare Architecture
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• v.18 no.3
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• pp.19-28
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• 2012

The purpose of this research is to suggest design direction about common space of small sized residential units for elderly housing in order to construct desirable residential environment. This research examines spatial composition and the residents' behaviors in three different types of residential units at intervals of five minutes from 9:00 a.m. to 19:00 p.m.; and analyzes the characteristics of spatial use. The following is the result. The using rate of common space is influenced by the atmosphere of residential units more than healthy condition of the elderly; furthermore, the frequency of usage is also increasing highly as mush as forming the lively atmosphere. In order to form the animated residential environment, it is necessary to provide to various activities, such as cooking, eating, watching TV, leisure, hobby, rest, etc; and the space must plan encouraging relationship with other people. Moreover, it is required to consider to each of personal characteristics ingeniously, and manage to programs extending their durability in common space of elderly housing.

• Structural Engineering and Mechanics
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• v.48 no.6
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• pp.809-822
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• 2013

Base isolation is widely used in seismic resisting buildings due to its low construction cost, high reliability, mature theory and convenient usage. However, it is difficult to design the isolation layer in high-rise buildings using the available bearings because high-rise buildings are characterized with long period, low horizontal stiffness, and complex re-distribution of the internal forces under earthquake loads etc. In this paper, a simple and innovative isolation bearing, named Teflon-based lead rubber isolation bearing, is developed to address the mentioned problems. The Teflon-based lead rubber isolation bearing consists of friction material and lead rubber isolation bearing. Hence, it integrates advantages of friction bearings and lead rubber isolation bearings so that improves the stability of base isolation system. An experimental study was conducted to validate the effectiveness of this new bearing. The effects of vertical loading, displacement amplitude and loading frequency on the force-displacement relationship and energy dissipation capacity of the Teflon-based lead rubber isolation bearing were studied. An analytical model was also proposed to predict the force-displacement relationship of the new bearing. Comparison of analytical and experimental results showed that the analytical model can accurately predict the force-displacement relationship and elastic shear deflection of the Teflon-based lead rubber isolation bearings.

• Journal of the Korean Institute of Landscape Architecture
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• v.26 no.1
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• pp.83-95
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• 1998

Interest in weekend farming has been increasing recently among city-dwellers although it is still only in the beginning stages. Weekend farming has been increasing recently among city-dwellers although it is still only in the beginning stages. Weekend farms provide people with new activities and also help to preserve green areas within the city. It is necessary to understand what weekend farm users think and what problems they encounter in order to increase the use of these farms. For this reason, we studied 16 weekend farms in Seoul managed by the Rural Guidance Office and the Agricultural Cooperative. We distributed 24 questionnaires by hand and these were later returned by mail. The questionnaire asked weekend farmers about their motivation for using the farms, about their motivation for using the farms, frequency of use, level of satisfaction, current state of housing and the sort of plants they cultivated, among other things. We found that most of them live in apartments and have little access to green areas,. Weekend farm users were generally satisfied. However, they had a lack of gardening knowledge and reported that facilities such as toilets and water service were unsatisfactory. Political support is needed from the government in order to improve weekend farms. There needs to be a wider range of farm sizes and an increase in the uses of the farms. If these improvements occur, investment in and the development of weekend farming will increase and weekend farms will take root in Korea.

• Journal of electromagnetic engineering and science
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• v.10 no.3
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• pp.104-116
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• 2010

With several advantages such as flexible downlink-to-uplink(DL-to-UL) ratio and flexible spectrum usage, Time Division Duplexing(TDD) is emerging as an alternate to Frequency Division Duplexing(FDD), especially in wireless broadband systems. We already have at least four different TDD systems in the industry: Time Division-Synchronous Code Division Multiple Access(TD-SCDMA), IEEE 802.16e-TDD, IEEE 802.16m-TDD, and Time Division-Long Term Evolution(TD-LTE). A disadvantage of TDD is that tight coordination such as time synchronization between adjacent operators is required to prevent interference between the adjacent TDD systems. In this paper, we investigate coexistence scenarios among the above four well-known TDD systems and calculate spectral efficiency(SE) loss in each scenario. Our findings are that SE loss can be significant if TDD ratios of the adjacent operators are considerably different. However, as long as the TDD ratios of the adjacent operators are similar, configurations in the systems permit perfect time synchronization between the two heterogeneous TDD systems, and the resulting SE loss is zero or reasonably low. We believe that the above findings and the configurations of the TDD systems recommended tominimize SE loss will be helpful for operators who deploy TDD systems in system parameter determination and cross-operator coordination.

• Journal of the Korean Society of Costume
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• v.56 no.7 s.106
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• pp.31-41
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• 2006

The purpose of this study is to formulate a concept of naturalism in fashion and verify the design characteristics found in such designs via reviewing the concept of naturalism and its influence on dress making in different periods in history. The references from various academic fields including philosophy, literature and fine arts were used to examine how the naturalism was formulated over the years. This study was then to identify the naturalistic influences by closely examining various Western dress codes found in literature, publications and actual samples. The results of this study shows that the close examination of naturalism in fashion with the changes of times displayed the complex evolution process over the years, and they were classified by four distinctive categories; Retro, Ecology, Primitive and Ethnic. Naturalism in the contemporary fashion design showed higher frequency of adopting ecological and retro styles, especially retro style adoption being on the rise, combining wide range of partial components of each style. The color usage showed the skewed concentration on YellowRed, Red and Yellow colors with pale, light grayish and grayish tones.

• Transactions of the Korean Society of Automotive Engineers
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• v.24 no.2
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• pp.225-231
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• 2016

A military vehicle is driven at different usage modes with the army application and servicing conditions. For practical durability validation, DT(Development Test) on a new military vehicle should be run up to the durability target kilometers on test courses in the specified proving ground. Driving velocities with test courses at the endurance mode of DT are established definitely. However, OT(Operational Test) and initial endurance test of production car can't be performed only in the DT courses due to the development period limit. Therefore, this paper focuses on the method to analyze the relative road damages between the endurance test in DT and other endurance test. Road load acquisition tests on KLTV(Korean Light Tactical Vehicle) were implemented at 15 driving modes in off-road and cross-country courses of two tests. Wheel accelerations were processed through band-pass filter, and then the main frequency and maximum power of the signals were computed by PSD analysis. Finally, using the proving ground optimization based on RDS(Relative Damage Spectrum) characterization, the damage factors between off-roads of test courses were determined.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.06a
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• pp.332-334
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• 2016

본 논문에서는 중계 차량 내 콘트롤러 사용빈도 분석을 위한 방법에 대해 논한다. 중계 차량 내 장비는 대부분 외산에 의존하고 고가의 장비를 사용하고 있다. 따라서 투자비용이 높고 국산화 기술에 대한 연구가 미미하다. 또한 사용하는 장비의 기능은 한정적인 것에 반해 불필요한 확장 기능이 너무 많이 탑재되어 있어 사용자의 활용 빈도가 낮고, 사용하기가 어렵다. 이에 본 논문에서는 인간공학적 콘트롤러 개발을 위해 이동식 중계 차량 내 콘트롤러 사용빈도를 영상 기반으로 자동 분석하기 위한 방법에 대해 제안한다. 사용빈도 분석을 위해 사용자의 손을 추적하고, 손으로 추정되는 좌표 값을 파악하여 계속 누적한다. 일정시간 동안 누적한 좌표값을 분석하여 콘트롤러 사용 빈도에 대해 파악하고자 한다. 이는 국내 중계방송 환경에 적합한 콘트롤러 장비를 개발하는 데 도움을 줄 수 있으며 국산 기술을 확보할 수 있는데 의의를 가진다.

• Journal of Korean Society for Quality Management
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• v.46 no.2
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• pp.259-268
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• 2018

Purpose: SIT(Systematic Inventive Thinking) has been widely used in recent years. The validity of the five thinking tools of SIT is examined, and how to improve the inventive thinking tools is investigated. Methods: Frequency analysis on the usage of the TRIZ 40 inventive principles was used. Inventive thinking tools are derived by eliminating principles with low frequencies and grouping similar principles together. Results: Segmentation, prior action, combining, extraction, cushion in advance, transformation of properties are most frequently used among the 40 principles of TRIZ. The most frequently used principles and similar principles with them are grouped into new inventive thinking tools. Two of them, division and attribute dependency, belong to the 5 thinking tools of SIT, and the others, proactive measures, combination and reversal, do not. Conclusion: The newly identified inventive thinking tools are division, combination, proactive measures, attribute dependency, and reversal. The new five inventive thinking tools are quite efficient since they can cover more than two thirds of the TRIZ 40 inventive principles.

• Korean Institute of Interior Design Journal
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• v.19 no.4
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• pp.22-30
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• 2010

Light has primary function to enlighten the darkness. However, as development and progresses in media has caused big change in our life, the range of usage and application of light is broadened. And these days, light is actively used as a communication tool in a space. This thesis is based on an idea that a new prospect of light is required and at the same time the theoretical foundation should be established to take active advantage of light. In Chapter two, analysis criteria are established to verify study hypothesis. The applied methodology is to analysis the contents based on literature review. Key words related light in space design are extracted and the frequency of those key words are quantitatively measured. Taking advantage of the result, the characteristics of light are divided into three categories, 'light as symbolic information', 'light as communication medium' and 'light as topological form'. In chapter three, analysis of cases is performed. The cases are selected based on space analyzing criteria established in Chapter two. Qualitative analysis is performed on the cases categorized into natural light and artificial light. Basic analysis elements are evaluated for each case. And each case is allocated to one of three categories, 'light as symbolic information', 'light as communication medium' and 'light as topological form'. Through this analysis, it is found that light in space has prevailing characteristics of 'light as symbolic information' and 'light as communication medium'.