• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 춘계학술대회 논문집
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• pp.735-739
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• 2002

PTB(Power Transfer Breaker) is a device which incorporate the functions of ACB(Air Circuit Breaker) and ATS(Automatic Transfer Switch). ACB is a circuit breaker against overload and ATS is a switching device to transfer the load between two electric power sources. An existing PTB design based upon the 5 bar & cam mechanism has been regarded to be too complex and thus a simpler 4 bar mechanism with trigger lock is proposed. Experimentation and optimization of the trigger lock is presented.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.810-814
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• 2001

power transfer breaker is a device used to transfer the load from the electricity power line to the emergency generators. In case of overload, it also functions as a circuit breaker. In this work, a new mechanism for the device is suggested. Among the various design challenges, optimization of the trigger mechanism is identified as of central importance. Optimal design decisions are made with the use of Taguchi method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 B
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• pp.1333-1335
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• 2000

In order to turn on the SCR gate, trigger signal source have to provide appropriate gate current and voltage under the gate rating based on the characteristic of SCR, the nature of load and power. It will be essential design factors such as trigger source impedance, trigger signal occurring, signal time width and turn off conditions. Also minimum gate trigger current is changed with the deterioration of SCR. SCR, which is needed large gate trigger current absolutely, is very important for SCR characteristic test because it causes unstable output in the misfile or makes a trouble to pulse trigger circuits. This paper shows scheme to test the performance of SCR with the precision analyzing mechanism and the changing trend of minimum gate current under the trigger conditions.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 1999년도 추계학술발표대회 논문집
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• pp.168-171
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• 1999

For the axial crushing tests of various shape of tubes, it was reported that composite tubes need trigger mechanism to avoid brittle failure. In this study, static axial crush tests were performed with the new aluminum/GFRP hybrid tubes. Glass/Epoxy prepregs were wrapped around aluminum tube and co-cured. The failure of hybrid tube was stable and progressive without trigger mechanism, and specific energy absorption was increased to maximum 34% in comparison with aluminum tube. Effective energy absorption is possible for inner aluminum tube because wrapped composite tube constrain the deflection of aluminum tube and reduce the folding length. The failure of hybrid composite tube was stable without trigger mechanism because inner aluminum tube could play the role of crack initiator and controller. Aluminum/Glass-Epoxy hybrid tube is suitable for the vehicle front structure due to effective energy absorption capability, easy production, and simple application for RTM process.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.1719-1723
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• 2005

An automatic target sensing and triggering system for small fire arms is proposed. The system consists of an optical collector, an infrared ray sensor responsive to human body temperature, an electric actuator and a trigger mechanism. TRIZ methodologies are used to develop solutions to several contradictory problems. Experimental results on the system performance is compared with predictions.

• The Korean Journal of Pain
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• 제12권1호
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• pp.75-80
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• 1999

Background: Despite tension type headache is popular, the exact mechanism and method of treatment are not certain yet. So, we supposed the basic mechanism of tension type headache is myogenic, and did Tienchu acupoint block, occipital nerve block, and trigger point injection in tension type headache patients. Methods: Fifty-seven tension type headache patients were treated with local anesthetics and small dose of steroid. The intensity of pain and effect of every treatment was evaluated as Verbal Rating Score (VRS; 0~10) before and after every treatment. Evaluation of treatment was based on the time of treatment (1,2 times, 3 times, 4,5 times). Goal of treatment was VRS reaching below two point and it was considered as treated state. Results: Symptom improvement rates of each treatment were 90% (1, 2 times), 91% (3 times), 70% (4, 5 times) respectively. VRS reduction more than 50% rates were 60%, 64%, 60% respectively. Treated state (VRS<2) rates were 33%, 27%, 30% respectively. Conclusion: Tienchu acupoint block, occipital nerve block, trigger point injection were sorts of most effective and simply applicable modalities of treatment in tension type headache.

• 한국자동차공학회논문집
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• 제8권6호
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• pp.208-219
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• 2000

In this study, static axial crush tests were performed with the new aluminum/GFRP hybrid tube. Glass/Epoxy prepregs were wrapped around an aluminum tube and co-cured. The failure of the hybrid tube was stable and progressive without trigger mechanism, and specific energy absorption was increased to the maximum of 33% in comparison with the aluminum tube. Effective energy absorption is possible for an inner aluminum tube because a wrapped composite tube constrains the deflection of an aluminum tube. The failure of a hybrid composite tube was stable without trigger mechanism because the inner aluminum tube could play the role of the crack initiator and controller. Mean crushing load could be calculated by modifying the plastic hinge collapse model for hybrid materials. The predicted results by this analytical model showed good agreement with the experimental results. It can be said that Aluminum/Glass-Epoxy hybrid tube is suitable for the vehicle front structure because this hybrid tube shows effective energy absorption, easy production, and simple application capability for RTM process.

• 대한물리치료과학회지
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• 제2권1호
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• pp.413-422
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• 1995

The trigger point phenomenon is an extremely common syndrome in physical therapy room. The symptoms created by these syndromes may be interpreted as originating in discogneic disease, nerve entrapment syndromes, viscerosomatic pain, and certain myalgic pain of unknown etiology. Injuries, viral or bacterial infections, immobilization, psychogenic stress, and other environment factors can preciptate and perpetuate these syndromes, which may occur in any of the voluntary muscles of the human body and thus lead to a multitude of myofascial pain syndromes. Obviously symptomatic treatment can meet with only partial success. Knowledge of the trigger point phenomenon will aid the diagnostician in understanding otherwise in explicable symptom. The trigger point are $2{\sim}5mm$ in diameter, hyperirritable palpable taut in a tissue, when compressed, is locally tender, if sufficiently hypersensitive, give rise to referred pain and tenderness, and sometimes to referred automatic phenomena and distortion of proprioception. The treatment of myofascial trigger point pain syndrome is not difficult once the source of the problem has been determined. Where as many modalities may be used, two of the most effective are spray-and stretch and TP injection. These can be followed by deep massage, specific, manual resistive exercise, and an exercise program which the patient can follow at home. The goal of management is to inactivate the TPs and to restore shortened and stretch resistent muscles to their full range of motion. The purpose of this case study was to know about the pathophysiologic mechanism of the trigger point and will enable to physical therapist to direct his treatment to the real source of trouble.

• 대한기계학회논문집A
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• 제35권6호
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• pp.661-667
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• 2011

접촉식 측정 프로브는 3 차원 좌표 측정기 및 CNC 공작기계 등에서 제품 검사에 많이 활용되고 있고, 최근 품질 향상을 위한 가공 및 검사장비의 고정도화에 따라 측정의 정확도도 또한 매우 중요시 되고 있다. 이에 따라 스트레인 게이지 등을 이용한 고정도의 측정 프로브가 사용되고 있기는 하지만, 본 연구에서는 경제적인 측면을 고려하여 산업현장에서 공작기계에 많이 활용되는 일반 접촉식 측정 프로브의 메커니즘을 이해하고, 측정 시 발생할 수 있는 프로빙 오차에 대한 분석 및 보정을 통하여 그 활용성을 높이고자 하였다. 이를 위하여 스타일러스 반경 및 중심 정렬오차가 규명되었고, 3 차원 공간상의 측정 좌표에서 프로빙 오차에 대한 해석이 이루어졌다. 이러한 오차들을 보정하기 위한 알고리즘이 개발되었으며, 실제 CNC 공작기계 상에서 기준구 측정을 통한 검증이 이루어졌다.

• 한국통신학회논문지
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• 제32권8A호
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• pp.802-812
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• 2007

Mobile IPv6환경에서 고속 핸드오버 프로토콜은 핸드오버 지연 시간을 줄임으로써 끊김 없는 서비스가 가능하도록 해준다. 이러한 고속 핸드오버의 이점을 IEEE 802.16e 환경에 적용하고자 본 논문은 다중 동시 바인딩 기법과 IEEE 802.21에서 제안된 이종망간의 핸드오버 기법을 이용한 IEEE 802.16e 기반 MIPv6망에서의 고속 핸드오버 기법을 제안한다. 또한 수학적 분석을 통해 기존의 FMIPv6와 핸드오버 지연과 패킷 손실량을 비교 분석한다.