• 대한통합의학회지
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• 제4권2호
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• pp.13-22
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• 2016

Purpose: The purpose of this study was to determine the effects of the swissball exercise in combination with core muscle in beginner golfer. In general, the swiss ball exercise was related in the core muscle ability. Methods: The experiment was conducted with a total of 10 beginner golfer, and they were dicide into two groups: comparison group(n=5) and experimental group(n=5). In this research, the subjects of the comparison group performed the general matte exercise three times a week, for four weeks. The subjects of the experimental group performed the swiss ball exercise in combination with core muscle three times a week, for four weeks. Use the 7-iron and driver were measured head speed and distance of the comparison group and the experimental group, respectively. The collected data were analyzed by using the paired t-test and ANCOVA Results: The results of this study were as follows: 1) Swiss ball exercise in combination with core muscle revealed the significant improvements after corresponding exercise in golf performance capability. 2) Mat exercise was seen less better than the swiss ball exercises. Conclusion: This results suggested that it was improved the golfer shot performance of beginner proposes to see the Swiss combined movement.

• 세라미스트
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• 제22권1호
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• pp.56-69
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• 2019

Recent advances in low-power sensors and transmitters are driving the search for standalone power sources that utilize unused ambient energy. These energy harvesters can alleviate the issues related to the installation and maintenance of sensors. Particularly piezoelectric energy harvesters, with the ability to convert ambient mechanical energy into useful electricity, have received significant attention due to their high energy density, low cost and operational stability over wide temperature and pressure conditions. In order to maximize the generated electrical power, the natural frequency of the piezoelectric energy harvester should be matched with the dominant frequency of ambient vibrations. However, piezoelectric energy harvesters typically exhibit a narrow bandwidth, thus, it becomes difficult to operate near resonance under broadband ambient vibration conditions. Therefore, the resonating of energy harvesters is critical to generate maximum output power under ambient vibration conditions. For this, energy harvesters should have broadband natural frequency or actively tunable natural frequency with ambient vibrations. Here, we review the most plausible broadband energy harvesting techniques of the multi-resonance, nonlinearity, and self-resonance tuning. The operation mechanisms and recent representative studies of each technique are introduced and the advantages and disadvantages of each method are discussed. In addition, we look into the future research direction for the broadband energy harvester.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.2224-2229
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• 2008

High-Speed train has been developed and it becomes faster and environmental friendly. As trains run faster, Noise of trains is generated mainly by aerodynamic disturbance. Pantograph, both ends of trains, and gaps of coaches which are thought to be aerodynamic noise's factors are primarily studied. Pantograph is a similarly shaped metal framework on the roof of an electric high speed train, transmitting current from an overhead electric catenary wire. Panhead which contacts electric wires directly looks like a bluff strut, goes through flows, is sensitive to external disturbances and is one of the most important factors which decide whole vehicles' driving ability. In this study, aerodynamically robust optimized pantograph panhead shape is designed and then evaluated through subsonic wind tunnel test. To compare these with existing panhead rectangular shapes or circular cylinder shapes, By visualizing strong vortex flow patterns which are main noise sources, characteristics are compared and analyzed

• Journal of Information Technology Applications and Management
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• 제20권2호
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• pp.15-37
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• 2013

In this study, the validity of CRM introductory is defined as a driving force for the introduction of technology and concepts such as competence factors of CRM. Effect on the ability to verify the information technology CRM using this concept, we examined the effect of force CRM information technology has on the outcome from the point of view of the customer interaction. And we have tested the moderate effect for size of the company and the industry shape to the relationship between the adequacy and implementation of CRM. As a result, technical adequacy and competence of CRM implementation CRM, has a significant causal relationship to CRM information technology capability. Competence of CRM implementation has a causal relationship with care for the outcome of the interaction of the customer, shows the validity of the introduction of CRM companies are seeking Modulatory effect was verified using the company's size and industry classification, was significant only for the classification of industries. This result shows that must find ways to introduce the CRM industry depending on the form of different.

• 재활복지공학회논문지
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• 제8권1호
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• pp.27-32
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• 2014

본 연구에서는 근래 활성화되고 있는 직업재활 분야의 장애인의 1차 산업 종사에 활성화를 도모하고자 업무 수행을 보조할 수 있는 장치인 수확물 카트 혹은 업무수행 공구함과 같은 장치의 무인 추적 시스템 개발하였다. 개발된 시스템은 사용자가 원거리에서 수동으로 이동을 제어할 수 있으며 또한, 무인으로 사용자를 추적하는 기능을 탑재하고 있다. 본 연구에서 개발된 시스템의 직업재활 분야의 허용성을 평가하기 위하여 사방이 3미터 이상 개방되어 있는 공간에서 시스템을 Y자와 W자 코스를 주행하여 최종 목적지로부터 오차 범위를 5회 기간 분석하였다. 분석 결과 개발된 시스템이 사용자의 추적을 문제없이 하고 있음을 알 수 있었다.

• Journal of the Korean Data and Information Science Society
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• 제25권3호
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• pp.501-512
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• 2014

본 연구에서는 H/W 전공자들의 프로그래밍 학업성취도 향상을 목적으로, 첫째, H/W 전공자들이 선호하지 않는 프로그래밍 분야에 학습자의 역량을 발전시켜 취업 관심도를 높이고 프로그래밍 분야로 취업을 도모하기 위한 교육사례를 제시하였다. 둘째, 향후 H/W 분야에서 학과차원의 특수성과 실정을 반영한 프로그래밍 교수법에 관하여 제안하였다. 마지막으로 교육사례와 설문조사를 실시하고 통계적으로 분석하여 프로그래밍 교육의 질 향상과 발전의 계기로 삼고자 하였다.

• 한국정보통신학회논문지
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• 제13권3호
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• pp.602-607
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• 2009

기존의 대부분의 각종 파이프 탐사로봇은 고정크기로 유선 케이블 통신방식으로 구성되어 사용되고 있다. 파이프 굴곡과 각도(수평, 기울어 짐, 수직)를 가지는 파이프 구조에서는 파이프 탐사작업이 매우 어려운 실정이다. 따라서 본 연구에서는 탐사로봇의 구조를 파이프를 스프링의 장력으로 밖으로 밀어내는 방식으로 제안 설계하였으며 통신방식을 RF 통신방식으로 변경 개선하였다. 이와 같은 구조 및 기능 개선으로 인해 로봇 한대로 허용오차내의 파이프 크기와 굴곡에 적응이 가능함으로써 운용의 효율성이 제고되었으며 파이프 내부의 문제점(균열, 부식, 슬러지 등)을 사전 모니터링하고 DB화하였다. 또한 새로이 제안하고 설계 개발된 탐사로봇은 소형, 경량이므로 운반과 동작이 매우 유리함을 확인할 수 있었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
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• pp.1623-1624
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• 2006

It is a paper for design, manufacture and estimation of industry inkjet head. Simulations for Actuator, Ink flow and Ejection are executed for securing design ability. Relations between droplet and properties of ink are explained closely through simulation for nozzle. Actually, two silicon plates are made by dry and wet etching and directly bonded. PZT materials is attached on the bended ink flow part and cut to $540{\mu}m$ interval by dicing saw. Actuator was seen variation within 10% between simulation and actual head. Through the ejection estimation, it is shown that stabilized driving voltages change according to viscosity and surface tension of metal ink. Using the metal ink of viscosity of 4.8 cps and surface tension of 0.025 N/m, it is possible to eject the stable droplets with 5m/s, 20 pl, 5 kHz.

• 대한안전경영과학회지
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• 제21권3호
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• pp.1-9
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• 2019

The Industrial Innovation Movement, based on win-win cooperation with SMEs, is a structure that enables suppliers who have struggled with corporate growth through productivity innovation due to poor manufacturing environment and lack of innovation. To this end, consultants and technical experts will support production innovation activities to improve production methods and improve productivity through process and management consulting. The purpose of this study was to explore the driving factors of the industrial innovation movement to improve the corporate ecosystem by improving the productivity of SMEs using modified IPA. The research results are as follows. First, in order to revitalize the Industrial Innovation Movement, the CEO-related elements of the participating companies should be maintained and strengthened. The motivation, education support, innovation organizational culture, the establishment of an innovation promotion system requires centralization of efforts for improvement. Second, in order to revitalize the Industrial Innovation Movement, the consultant's ability to analyze problems and suggest alternatives should be continuously strengthened. Third, in terms of the Central Promotion Headquarters, it was found that the Industrial Innovation Movement would be successful if the public information, industrial inspection for benchmarking, and provision of various information to support innovation activities were urgently improved.

• 대한방사선기술학회지:방사선기술과학
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• 제42권5호
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• pp.365-371
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• 2019

We have developed and applied a diagnostic Multi-Leaf Collimator (MLC) to optimized the X-ray field in medical imaging and the usefulness evaluated through the fusion of infrared image and X-ray image acquired by infrared camera. The hand and skull radiography with multi-leaf collimator(MLC) showed significant area dose reductions of 22.9% and 31.3% compared to ARC and leakage dose was compliant with KS A 4732. Also scattering doses of 50 cm and 100 cm showed a significant decrease to confirm the usefulness of MLC. It was confirmed that the fusion of infrared images with an adjustable degree of transparency was possible in the X-ray images. Therefore, fusion of anatomical information with physiological convergence is expected to contribute and improvement of diagnostic ability. In addition, the feasibility of convergence X-ray imaging and DITI devices and the possibility of driving MLC with infrared images were confirmed.