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해양 레저 스포츠 관광용품 공급업자 역량이 장기지향성에 미치는 영향과 신뢰의 조절효과에 관한 연구
류상하,조수현 한국호텔관광학회 2011 호텔관광연구 Vol.13 No.2
In this study, as the importance of long-term relationship between supplier and buyer in the marine leisure sport tourism industry has been magnified, the purpose was to examine the influence of the supplier’s competence on the trust and the long-term orientation importantly perceived by the buyer. This study aims to achieve business profits by selecting another manufacturer through trading with purchasers or competent suppliers and reducing marketing cost, thereby offering a foundation to raise consumer satisfaction, and eventually to contribute to progress in academic studies on the relationship between two organizations eventually. The study result is as follows:The thesis 1, the relationship between the competence of marine leisure sports tourism goods suppliers (market information & customer support activity and brand value) and long-term orientation indicates that both factors, market information & customer support activity and brand value have a positive effect on long-term orientation. The thesis 2, the relationship between the competence of marine leisure sports tourism goods suppliers (market information & customer support activity and brand value) and trust indicates that both factors, market information & customer support activity and brand value have a positive effect on trust. The thesis 3, the control effect of trust in the positive effect on the relationship between the competence of marine leisure sports tourism goods suppliers and long-term orientation indicates that trust interaction effect has no statistical significance. Therefore, trust on the supplier’s competence has a positive effect on long-term orientation but trust variable has no control effect.
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위성 수신기용 광대역 튜너 시스템의 CMOS 단일칩화에 관한 연구
金栽完,김창봉,김수원,柳尙夏,徐範洙,金成男 대한전자공학회 2002 電子工學會論文誌-SD (Semiconductor and devices) Vol.39 No.7
The digital DBS tuner is designed and implemented in a CMOS process using a direct-conversion architecture that offers a high degree of integration. To generate matched LO I/Q quadrature signals covering the total input frequency range, a fully integrated ring oscillator is employed. And, to decrease a high level of phase noise of the ring oscillator, a frequency synthesizer is designed using a double loop structure. This paper proposes and verifies a band selective loop for fast frequency switching time of the double loop frequency synthesizer. The down-conversion mixer with source follower input stages is used for low voltage operation. An experiment implementation of the frequency synthesizer and mixer with integrated a 0.25um CMOS process achieves a switching time of 600us when frequency changes from 950 to 2150MHz. And, the experiment results show a quadrature amplitude mismatch of max. 0.06dB and a quadrature phase mismatch of max. 3.4 . 고집적화를 위해 직접변환 아키텍처를 적용한 디지털 DBS 수신기용 광대역 튜너를 CMOS 공정으로 구현하였다. 입력 주파수의 전 범위를 포함하는 정합된 LO I/Q 쿼드러처 신호를 생성하기 위해 링 발진기를 사용하였으며 링 발진기의 낮은 위상 잡음을 해결하기 위해 이중 루프 구조로 주파수 합성기를 설계하였다. 본 논문에서는 이중 루프 주파수 합성기의 매우 느린 주파수 스위칭 시간을 개선하기 위해서 초기 주파수 차이를 보상하는 대역 선택 루프 구조를 제안, 검증하였다. 그리고 하향 변환 믹서는 저전압 동작이 가능하도록 소스 팔로워 구조로 설계하였다. 0.25um CMOS 공정으로 집적된 주파수 합성기와 믹서는 측정 결과 위상 미스매치는 최대 3.4 , 진폭 미스매치는 최대 0.06dB의 쿼드러처 정확도를 얻었으며 950MHz에서 2150MHz로 주파수 변환시 약 600us의 스위칭 시간을 얻었다.
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고등학교 화학Ⅱ의 고체 용해도 측정 실험에 대한 분석 및 개선
윤정아,박국태,박세열,황현숙,백인환,류상하 한국교원대학교 교육연구원 2010 敎員敎育 Vol.26 No.4
이 연구의 목적은 고등학교 화학Ⅱ 교과서에 제시된 온도에 따른 고체의 용해도 측정 실험의 문제점을 파악하여, 학생들이 재현성 있는 실험 결과와 정상적인 용해도 곡선을 얻을 수 있는 개선 실험을 제시하고자 하는 것이다. 연구를 위하여 화학Ⅱ 교과서의 고체의 용해도 측정 실험을 분석하고, 화학교사를 대상으로 고체의 용해도 측정 실험에 대한 설문 조사를 실시하여, 온도에 따른 고체의 용해도 측정 실험의 문제점을 파악하여 개선 실험을 제시하였다. 연구 결과, 화학Ⅱ 교과서에 제시된 고체의 용해도 측정 실험의 실험 방법은 서로 달랐으며, 화학교사들은 실험 결과에서 오차가 많이 나고 실험 시간이 많이 소요되어서 고체의 용해도 측정 실험을 실험 수업으로 실시하기 어려워하였다. 온도에 따른 고체의 용해도 측정 실험에서 용질과 용매의 질량 측정 방법, 용질이 모두 녹는 온도 측정 방법, 결정 석출 온도 측정 방법 등을 개선한 개선 실험으로 재현성이 있는 실험 결과와 정상적인 용해도 곡선을 얻을 수 있었다. The purpose of this study was to find out the problems in the experiments determining solid solubility according to temperature in high school chemistry Ⅱ textbooks, and to propose an improved experiment for students to achieve reproducible results and a normal solubility curve. For this study, the experiments determining solid solubility in high school chemistry Ⅱ textbooks were analyzed. Chemistry teachers filled out questionnaires about the experiments determining solid solubility. The problems of the experiments determining solid solubility according to temperature were analyzed, and an improved experiment was proposed. The results showed that experimental methods in most of high school chemistry Ⅱ textbooks were much different from each other. Chemistry teachers were having difficulties in the experiments determining solid solubility because the experiments were time consuming, and the results had errors. It was possible to get reproducible results and a normal solubility curve with the improved experiment which was carried out with improvements in the methods of measuring mass for solute and solvent and determining temperature for crystallizing and dissolving.
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임현빈(Hyun-Bin Lim),이중희(Jung-Hee Lee),송명호(Myung-Ho Song),오상하(Sang-Ha Oh),류누리(Nu-ri Ryu) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
With the recent growth of smart factories, demand for process automation is increasing. Robot arms are widely used in automation processes because they can move flexibly and move and mount heavy objects. In the case of vehicle tires, it is advantageous to use a robot arm because the tire is heavy. To mount the vehicle tire to the wheel hub, the robot arm must know the exact location of the wheel hub of the vehicle. However, it is difficult to specify the location of the wheel hub because the location of the vehicle is not constant. This paper proposes an algorithm for estimating the location of a vehicle wheel hub using depth images so that vehicle tires can be mounted on a wheel hub using a robot arm. Since the location of the wheel hub that changes through the algorithm can be known with six-axis coordinates, tires can be mounted using a robot arm. In addition, the process can be automated because the robot arm is used.
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