• 전자공학회논문지SC
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• 제44권6호
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• pp.35-41
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• 2007

자연스러운 머리 움직임 하에서 응시점을 추정할 수 있는 시스템을 제안하였다. 이 시스템은 하나의 카메라와 2개의 거울로 구성되어 있으며, 이 거울은 안구에서 눈동자의 영상을 언제나 카메라로 획득할 수 있도록 유지시키는 기능을 한다. 그러나 영상의 획득 속도가 초당 30 프레임이므로 거울의 제어가 빠른 머리 움직임을 보상할 수 없다. 이러한 문제점을 극복하고자 현재 안구 이미지에서 다음 안구 이미지의 위치를 추정하기 위하여 Kalman filter를 적용하였다. 그 결과 수평방향으로 평균 55cm/s, 수직 방향으로 평균 45cm/s정도의 속도의 머리 움직임에 대한 보상이 가능하였다. 그리고, 머리 움직임의 공간도 수평 60cm, 수직 30cm의 넓은 범위까지 가능하였다. 공간 해상도는 수평과 수직 각각 $4.5^{\circ}$와 $5^{\circ}$ 였고, 자연스러운 머리 움직임 아래에서의 응시점의 정확도는 92% 였다.

• 대한기계학회논문집B
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• 제38권5호
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• pp.381-388
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• 2014

본 연구는 해상풍력발전을 위한 기초적인 연구로서 해상의 상태를 단순히 모사한 파랑에 의한 부유체의 시계열 및 주파수 거동의 특성을 파악하기 위하여 조파기를 구축하고 이의 타당성연구를 하고자 하였다. 소형의 조파수조에 모사된 여러 가지 파고 데이터를 검증하였으며, 단순한 부유형상을 제작하여 설치하고 이의 거동을 해석하였다. 부유체의 거동분석을 위해 하부체에 계류선을 설치 유무에 따라 그 거동특성도 관찰하였다. 부유체 거동을 가시화하기 위하여 부유체 내에 LED를 설치하여 고속카메라를 이용하여 촬영한 이미지를 해석하였다. 그 결과 부유체에 계류선이 설치된 경우 파랑에 의한 힘이 계류선으로 분산이 된다는 것을 알 수 있었다. 또한 부유체의 시계열 거동에 대한 스펙트럼 분석 결과 파랑의 주기가 길어질수록 피크값이 점차 감소한다는 것을 확인하였다.

• 수산해양교육연구
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• 제15권2호
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• pp.206-218
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• 2003

In spite of the importance of a fishing industry, neither any terminology defined in details nor academic systems to educate the workers in the fishery were established in the fisheries social education. The fisheries social education was considered to be the practical area around the actual fields. Therefore, on-site education was very important. Accordingly, this study collected and analyzed theoretical basis of a social education and data on the rural adult education and examined the actual status of the fishing industry in Korea and fisheries extension services enterprise and fisheries developmental enterprise corresponding to the actual fisheries social education conducted in Korea. On the basis of these frames, this study summarized the direction for the progress of fisheries social education that has not been studied until now for the purpose of suggesting the future directions of the fisheries social education as follows; The recognition on the importance of fisheries social education and fundamental researches in the fisheries social education should be extended. The practical development of fisheries social education should be realized. Fisheries extension services enterprise should be evolved by fishermen. The abilities of instructors in the fisheries social education should be improved. The academic factors in the fisheries social education should be emphasized. Inter-disciplinary and multi-disciplinary approaches should be adopted. Various programs should be developed for the progress of the fisheries social education. The exclusive department in charge of the fisheries social education should be established. The information system for the fisheries social education should be secured. The industry, academic organizations and the organs should make cooperation. The fisheries social education should be provided by general social education institutions for the progress. The fisheries development should be deployed on the basis of environmental preservation. It is necessary to deploy the new fishing village movement like the Saemaul movement to the fisheries. The administrative and financial supports for the fisheries social education should be expanded. It is essential to cultivate the future fishermen for the international competitiveness.

• 전기화학회지
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• 제7권2호
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• pp.69-79
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• 2004

전산모사를 이용하여 특성을 정확하게 모사하기 위해서는 전지 내부에서 발생하는 다양한 물리적, 화학적 현상을 고려하여야 한다. 이를 위해, 본 연구에서는 다양한 전지 내부 현상에 대한 변수를 고려할 수 있는 전산유체 상용코드인 CFD-ACE+를 이용하여 평판형 고체산화물 연료전지의 작동 특성을 분석하였다. 단위 스택에서 발생하는 물질전달과 열전달 및 전기화학 반응에 의한 전하이동을 복합적으로 고려하여, 작동조건 하에서 각 공정적, 구조적 변수 변화에 따른 전지특성을 예측하였다. 이러한 전산모사 방법을 통하여 확산과 유동에 의한 전지 내 반응물과 생성물의 mass fraction 분포와 단위 스택의 내부 온도분포 그리고 전지 특성을 나타내는 polarization curve에 의한 고체산화물 연료 전지의 분극 특성을 정성, 정량적으로 제시하였다. 본 연구를 통해 평판형 단위 스택 내에서의 다양한 변수 변화에 따른 전지의 작동 특성에 대한 효율적 예측이 가능하였고, 고체산화물 연료전지 작동 시 발생하는 현상에 대한 전산모사 접근법을 체계적으로 제시할 수 있었다.

• 대한물리치료과학회지
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• 제9권4호
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• pp.119-130
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• 2002

Objective: The purpose of this research was to use data for furnish quality physical therapy service. The research subjects were admitted shoulder pain patients treated with physical therapy that was to grasp physical therapy method as distinguishing application time. Subject: Total number of distributed questionnaire was 563 persons that was to utilized physical therapy room of 56th medical institution and distributed it to each physical therapist in charge. Method: The research used questionnaire in order to research itemized treatment application time that is according to physical therapy method to applicated with shoulder pain patient. The research contents is to received shoulder pain diagnosis period, total duration of utilizing physical therapy room, the number of times per week to used physical therapy room, etc. And we had physical therapist recording the time of application physical therapy method come under the items. Result: The average treatment time was 59.2 minutes at all patients. During this time, 39.7 min was modality treatment. Active movement treatment was only 7.1 min. Total treatment time was longest in general hospital at 64.9 min, it was shortest in clinical hospital at 53.3 min. Treatment time was difference as hospital scale(p<0.001). Active movement treatment time was longest in general hospital at 11.5 min. The average treatment time was 4.5 min in clinical hospital. Therefore, it was related to hospital scale(p<0.05). The average of manual therapy time by physical therapist was 7.5 min. General hospital was linger at 8.6 min than clinical hospital at 6.7 min(p<0.05). Patient of 90.2 % were treated to hot pack, ultra-sound treatment was next as 50.1%. Active strengthening exercise was most carrying out of the active treatment as 25.4 %. Active sensorimotor exercise was practiced only 28 persons of 5.0 %. Most joint mobilization (38.4 %) was used of the passive manual therapy items, next to soft tissue mobilization (33.0 %), and next to manual distraction therapy(14.0 %).

• 한국정보통신학회논문지
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• 제17권10호
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• pp.2239-2244
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• 2013

산업용 기기는 전력 공급용 전선으로 인해 이동성에 제약이 따른다. 최근 자유로운 이동성이 요구되는 산업용 기기의 무선 전력 공급에 관한 연구가 많은 주목을 받고 있다. 본 논문에서는 근거리에서 장비의 배터리에 무선으로 전력을 공급하는 자기 유도방식의 시스템을 제안한다. 제안하는 시스템은 13.56 MHz에서 동작하며, 송수신 전력 모듈간의 거리는 20~30 mm으로 설계하였다. 실험을 통해 제안하는 시스템으로 약 15 V 의 배터리를 충전하는데 135 분이 걸리는 것을 확인하였다.

• 한국측량학회지
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• 제36권3호
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• pp.177-184
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• 2018

In case that limited resources can be mobilized, non-structural countermeasures such as 'monitoring using Information and Communication Technology might be one of solutions to mitigate disaster risks. Having established the monitoring system, operational and maintenance costs to maximize the effectiveness might trouble the authority concerned or duty attendant who is in charge. In this respect, "Guerrilla Sensor" would be very cost effective because of the inherent mobility characteristic. The sensor device with the IRIS camera and GPS (Global Positioning System) equipped, is basically battery-operated and communicates with WCDMA (Wideband Code Division Multiple Access). It has a strong advantage of capabilities for 'Disaster Response' with immediate and prompt action on the spot, making the best use of IoT (Internet of Things), especially with the mobile web. This paper will explain how the sensor system works in real-time GIS (Geographic Information System) pinpointing the exact location of the abnormal movement/ground displacement and notifying the registered users via SMS (Short Message Service). Real time monitoring with early warning and evaluation of current situations with LBS (Location Based Service), live image and data information can help to reduce the disaster impact. Installation of Guerrilla sensor for a real site application at Gimcheon, South Korea is also reported.

• 무역상무연구
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• 제50권
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• pp.309-331
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• 2011

Today, the world is considered to indispensable basic data in specific gravity of international trade is increasing in economic activity of every country with globalization, and trade connection index number analyzes an economy or part of trade that contribute to economic growth of a country along with other foreign trade statistics and evaluates along with this. Also, it is becoming one of big subject for economic policy person in charge and related economists I do how measure movement of amount, price and amount of materials in trade. But, about till now interest lack about trade index and trade index creation theoretical, it is actuality that export, import connection index number or similar research is not attained much into domestic and overseas from study tribe which is gone ahead. Moreover, study that try to judge and forecast stream of market applying trade connection index number is hard to find on study until now. And, in this research, there is the objective to figure out stream of Korean market change through trade business index creation that base on Korea Customs Administration export and the importation data and this is differences with several study, and at the same time, it is value of this study.

• Advances in materials Research
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• 제4권3호
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• pp.165-178
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• 2015

Friction coefficient of epoxy metal matrix composites were investigated. The main objective was to increase the friction coefficient through rubber sole sliding against the epoxy floor coating providing appropriate level of resistance. This was to avoid the excessive movement and slip accidents. Epoxy metal matrix composites were reinforced by different copper wire diameters. The epoxy metal matrix composites were experimentally conducted at different conditions namely dry, water and detergent wetted sliding, were the friction coefficient increased as the number of wires increased. When the wires were closer to the sliding surface, the friction coefficient was found to increase. The friction coefficient was found to increase with the increase of the copper wire diameter in epoxy metal matrix composites. This behavior was attributed to the fact that as the diameter and the number of wires increased, the intensity of the electric field, generated from electric static charge increased causing an adhesion increase between the two sliding surfaces. At water wetted sliding conditions, the effect of changing number of wires on friction coefficient was less than the effect of wire diameter. The presence of water and detergent on the sliding surfaces decreased friction coefficient compared to the dry sliding. When the surfaces were detergent wetted, the friction coefficient values were found to be lower than that observed when sliding in water or dry condition.

• 설비공학논문집
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• 제10권6호
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• pp.763-772
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• 1998

The effects of an inserted coil on flow patterns and heat transport performance for a horizontal rotating heat pipe have been studied experimentally. Especially, the present study is to see an internally inserted helical coil inside a RHP would lead to the same kind of results as internal fins. Visualization test conducted for an acryl tube, charged water with at a volumetric rate of 20%. When the flow kept pool regime at a low RPM(less than 1,000 RPM), the movement of coil forced the water to flow in axial direction. But this pumping effect of coil disappeared, when the pool regime changed to annular one which could be created by increasing RPM. The pumping effects for RHP with an inserted coil resulted enhancement both in condensation heat transfer coefficient and heat transport limitation, as obtained in case of using internal fins. But all these effects became negligible in the range of higher RPM(above 1,000∼1,200) with the transition of flow regime to annular flow.