• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.1967-1968
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• 2006

본 논문에서는 비전과 관성센서를 이용하여 2바퀴를 가지는 이동장치를 개발하였고, 이에 대한 역학 모델을 제안한다. 본 이동장치에서 바디부분은 바퀴의 축에 직접 연결되어 있으므로 물리적인 결속이 필요한 기존의 센서로는 진자의 기울어짐을 알 수 없다. 따라서 바디의 기울어짐을 측정하기 위하여 관성센서를 사용하였다. 보다 안정된 주행을 위해 바닥의 기울어짐을 측정하기 위해 비전을 이용하였다.

• Journal of Biosystems Engineering
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• v.25 no.5
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• pp.341-350
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• 2000

This study was conducted to develop a control unit for a tying device of a variable chamber round baler. The work process of the tying device was thoroughly analyzed and the control sequence was established according to the work process. Based on this control sequence, a control unit using an 8 bit microprocessor AT 89C52 as a CPU was developed. The driving circuit to control the actuator motion was developed and the PWM method was used to regulate the velocity of the actuator. On the front panel of the control unit, indicators were also installed to show the operations being conducted. A prototype of the developed control unit was manufactured and tested. A total of 50 complete cycles of the control sequence was repeated and no failure was observed. It was evaluated that the developed control unit has an excellent performance and can be used practically for variable chamber round balers.

• Journal of the Korean Society for Railway
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• v.19 no.4
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• pp.489-497
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• 2016

The rail fastening system, which provides a structural connection between the rail and the sleepers, is a main track component that plays an important role in retaining the rail gauge within acceptable tolerances, as well as in passing the train load to the roadbed through the sleepers. In this paper, a modal test was first performed to evaluate the dynamic characteristics (e.g., natural frequency) of the clips of the railway fastening system under the condition of rail corrugation in urban railway operation. The corrugation-induced passing frequency was then compared with the natural frequency of the clips to investigate any resonance effect during train passage. Furthermore, a field test under train passage was conducted to measure the accelerations on the rail and the rail fastening clips as well as the strains on the rail fastening clips in the rail corrugation condition. The field measurements indicated that the accelerations on the rail and the rail fastening clips have a close relationship with the rail corrugation, but they had a minimal effect on the strains of the rail fastening clips.

• Journal of the Korea Institute of Building Construction
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• v.20 no.5
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• pp.459-469
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• 2020

The purpose of this study is to secure the same or more structural performance and constructability for the detail off hooks cross-constructed at 135° used as external-ties standard detail in reinforced concrete columns, therefore, to the purpose of improving constructability, The clip-type binding implement was suggested. the experiment on the constructability evaluation and cost analysis of the clip-type binding implement by 90° end-hooked transverse reinforcement in reinforced conrete columns was carried out. The results of the analysis confirmed that standard detail column took about an one hour regardless of the diameter of tie. When using the clip-type binding implement, It was reduced to about 50% of the standard detail column. and regardless of the building size, it was most effective for the cost down when using the clip-type binding implement 1ea, it was about 32% fo labor cost reduction effect in comparison with using standard detail. as a result, Using the clip-type binding implement is shown be very effective in the working time and construction cost reduction.

• The Journal of the Convergence on Culture Technology
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• v.8 no.3
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• pp.265-270
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• 2022

The purpose of this study is to derive the damage weak part of the elastic rail fastening system for concrete tracks (System 300-1). In the concrete tracks, the elastic rail fastening system sticks the rail and the sleeper and reacts all the time when the train is running. Among the components of the rail fastening system, the resilience pad and tension clamp were fatigue members and were constantly deformed in response to compressive and uplift forces. In this study, the residual deformation characteristics of the tension clamp according to the period of use were analyzed using by specimens taken on site in the same section for 6, 11, and 16 years on the serviced urban transit. In addition, the damage mechanisms for each component were derived based on finite element analysis. As a result of the numerical analysis, the stress (strain) of each part of the tension clamp according to the external force from the applied clamping force was analyzed to derive the damaged weak part of the tension clamp.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1743-1744
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• 2008

NSOM(Near-field Scanning Optical Microscopy) 조화 진동자(Tuning fork)와 광섬유 탐침을 결속시켜 미소신호를 검출하여 증폭과 잡음을 제거하기 위한 Pre-amplifier의 설계 및 제작과 더불어 시료-탐침간 거리를 파장보다 짧게 유지시키는 Shear force 검출, 효율적인 시료-탐침 거리유지 알고리즘 구연 및 탐침을 시료 표면에서 일정한 거리를 안정적으로 유지하도록 제어 및 시료의 높이 정보를 얻어내는 시스템을 설계 및 제작하였다. 또한 ����$CO_2Laser$를 이용한 Heat Pulling 장치개발을 통해 탐침을 제작, LabVIEW를 통해 개별적인 시스템을 하나로 통합하여 AFM 테스트 시료인 SiO 샘플의 표면 형상을 측정하였다.

• Annual Conference on Human and Language Technology
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• 1993.10a
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• pp.227-240
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• 1993

본 연구의 목적은 한국 현대시 텍스트가 독자에게 전달하는 시적 효과를 담화 텍스트 언어학 및 인지적 화용론의 관점에서 분석하는 것이다. 담화 텍스트 언어학은 텍스트의 언어 자료 자체보다는 이를 생산하고 수용하는 인지 과정에 주목하는 인지과학의 한 분야이며, 적합성 원리로 되는 인지적 화용론은 텍스트 언어학에서 규명하는 바 여러 인지적 조작 절차들의 심리학적 근거가 된다. 많은 인지적 책략 및 조작 절차들이 집약되어 있는 한국 현대시 텍스트를 인지 화용론적 관점에서 분석한 결과, 이제까지 모호하게 개진되어 오던 많은 시적 효과가 텍스트 언어학 및 인지적 화용론의 분석 장치들에 의해서 명쾌하게 설명될 수 있음이 밝혀졌다. 즉, 정보성의 격상 및 격하, 각별한 결속구조의 사용 및 그 수용 과정, 작가의 상황점검과 상황관리 과정에 의한 전국적 인지 패턴의 활성화 및 수정 등의 인지적 절차를 통해서 독자의 맥락이 수정, 확장되는 효과가 일어나고 바로 이것이 궁극적으로는 시적 효과를 낳는다는 점을 설명할 수 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.6
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• pp.4267-4275
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• 2015

Prefabricated houses are fabricated at the factory for approximately 60 to 80% of the entire construction process, and assembled in the field. In the process of transporting and lifting, internal and external finishes of the unit module are concerned about damages. The purpose of this study is to improve the fixing equipment by analyzing load behavior. The improved fixing equipment would minimize the deformation of internal and external finishes. In order to develop the improved fixing equipment, transporting load on the fixing equipment is analyzed using Monte Carlo simulations, and structural performance is verified by the non-linear finite element analysis. Statistical analysis shows load distribution of unit module is similar with extreme value distribution. Based on the statistical analysis and Monte Carlo simulation, the maximum transporting load is 28.9kN and 95% confidence interval of transporting load is -1.22kN to 9.5kN. The nonlinear structural analysis shows improved fixing equipment is not destructed to the limit load of 35.3kN and withstands the load-bearing in the 95% confidence interval of transporting load.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.371-372
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• 2013

먹거리 안전에 대한 우려가 커져가면서, 무엇을 먹을 것인지 식료품을 어떻게 구매할 것인지에 대한 소비자들의 관심이 증가하고 있다. 미국에서 2000년 중반부터 생겨난 신조어인 '로카보어 (locavore)'는 이와 같은 현상을 반영한 것이다. 이 용어는 지역이라는 의미의 '로컬(local)'과 먹는다는 뜻의 'vore'에서 파생된 것으로서 '지역에서 생산된 음식을 먹는 사람'이라는 의미를 가지고 있다. 건강에 좋은 음식을 소비하기 위한 적절한 장치로 로카보어 운동은 여러 가지 방식으로 음식 공급 체계를 유지할 수 있다. 농촌경제는 이어지는 FTA체결 등 시장 개방의 압력으로 인해 쇠퇴 일로에 있다. 이와 같은 관점에서 보면 지금은 지역농업을 살리기 위한 보다 효과적이고 실질적인 대응책을 개발할 시점이다. 따라서 로카보어 운동을 활성화함으로써 농촌 공동체는 사회적 결속을 강화할 수 있을 뿐만 아니라 지역경제 활성화를 꾀할 수 있다. 이 연구에서는 경기도 포천을 로카보어 운동의 한국형 모델로 선정하였다. 이는 포천이 서울과 근접해 있으며 관광객들이 자주 찾는 관광콘텐츠가 지역에 산재해 있을 뿐만 아니라 도 농복합도시로서 다수의 농장과 경작지로 구성되어있기 때문에 인근 대도시의 농축산물 수요를 충족할 수 있는 충분한 농축산물 산지라는 것이 장점이다. 이러한 측면에서 포천은 품질 좋은 지역의 농축산물의 공급처로서 '농축산 플랫폼(agro-platform)'의 구축을 체계화함으로써, 한국형 로카보어 운동의 중추적인 역할을 할 수 있을 것이다.

• Korean Journal of Construction Engineering and Management
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• v.22 no.6
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• pp.138-146
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• 2021

135 Degree standard hook workability crossed in the Reinforced Concrete (RC) Structure is improved and it reinforces in one side 90° hook binding. As a result, we proposed a One-touch Rebar Reinforcing Clip(RCC Device) that demonstrates the same performance as the 135° standard hook. It was developed through the evaluation of construction and economic analysis. As a result of analyzing 13 sites applied from June 2020, As expected, most of the cases were applied to the structural supervision or the point of the construction supervisor as an irresistible measure. therefore, Through field performance analysis, Various methods such as the method that the original contractor first purchases and then provides after contract with the partner company were proposed for the use of efficient and voluntary reinforcing clip. As a result, It is expected that the contribution in the field will be very high in terms of quality and process management through active utilization.