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손병기,Son, Byeong-Gi 한국과학기술단체총연합회 1999 과학과 기술 Vol.32 No.10
센서기술은 기계장치에 감각기능을 부여하는 기술이며 인간의 감각기능을 확대하는 기술이다. 세계 센서시장 규모는 2000년에는 2천4백억달러로 예상되며 우리 한국의 세계시장 점유율은 95년 기준 1.4%에 불과한 실정이다. 우리나라의 연구실태를 살펴보면 87년 40명의 회원으로 한국화학센서연구회가 발족되었고 90년 경북대에 센서기술연구센터가 설립되었으며 91년엔 한국센서학회가 발족되어 현재 1천여명의 회원이 연구활동을 펴고 있다. 그러나 센서기술연구소는 과학재단의 9년지원이 종료된 상태로 앞으로 효과적인 활동을 펼 수 있는 새로운 지원프로그램 개발이 절실하다.
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손병기,이종현,신장규,Son, Byeong-Gi,Lee, Jong-Hyeon,Sin, Jang-Gyu 대한전자공학회 1985 전자공학회지 Vol.22 No.6
집복회로제조기술을 이용하여 극소형이고 초경량이며 감도, 천택도 및 안정도가 뛰어난 ISFET(lon Sensitive Field Effect Transistor)를 제조하였다. 특히 사람의 혈액속에 나타나는 중요한 4가지 이온인 H+, K+, Na+, Ca++에 대하여 각가 선택적으로 반응하는 감지막을 형성하여 H+-ISFET, K+-ISFET, Na-ISFET 및 Ca++-ISFET를 제작하였다. 이들 4가지 ISFET의 감도는 각각 52mv/pH 42mv/pk, 59mv/pNa및 28mv/pCa로 나타났으며. 1초 미만의 빠른 응답을 보였다. ISFETS for physiological applications have been developed using the techniques for integrated circuit fabrication. The silicon nitride layer was used as a H+ sensing membrane. However, K+, Na+ and Ca++ sensing ISFETS were fabricated by forming tach specification sensing membranes over the silicon nitride gate insulator. The sensitivities of the fabricated devices were very good. The typical values of measured sentivities were iEmV/pH, 42mv1, pH,5 gmV/pNa and 28mv1p0a. However, the selectivity and stability should be somewhat improved for practical physiological uses with good reliability. The response times were, less than one second, short enough for the practical uses in physiological applications.
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C- 및 Fe-(Beewax.Polyethylene) 정특성 감온소자
이종현,손병기,이종덕,Lee, Jong-Hyeon,Son, Byeong-Gi,Lee, Jong-Deok 대한전자공학회 1976 전자공학회지 Vol.13 No.4
beewax와 polyethylene을 혼합한 모체에 탄색 및 연분말을 징량첨가시켜서 정특성감온소자를 제조하였다. C.(beewax·Polyethylene)시편은 온도범위 20°∼90℃에서 104-1010Ωcm의 PTC특성을 나타내었으며 제조과정상에 분말혼합 및 가압냉각방법를 도입함으로써 그 재현성과 안정성을 현저히 개선시킬 수 있었다. 또한 Fe-(betwax· polyethylene)시편은 같은 온도범위에서 102-1010Ωcm의 PTC특성을 나타내었으며 저저항범위에서 PTC효과를 얻을 수 있었다. The carbon (the iron) -beewax·polyethylene thermistors have been prepared by heating the well ground mixture of carbon (iron), beewax and polyethylene at 160℃ for one hour and by cooling it under pressure of 12kgw/cm2. The resistivity for the former (the latter) increased from 102Ω·cm (104Ω·cw) to 1010Ω·cm(1010Ω·cm) as temperature changed from 20℃ to 90℃. The resistivity, 102Ω·cm at room temperature for the former, was lower by order Q( two than that for the papostor made by the earlier reporter. The reproducibility, which has been an important Problem for this type of thermistors to be industrialized, was improved by introducing pressure in cooling procedure for both carbon and iron thermistors. The carbon (the iron) -beewax.polyethylene thermistors have been prepared by heating the well ground mixture of carbon (iron), beewax and polyethylene at 16$0^{\circ}C$ for one hour and by cooling it under pressure of 12kgw/cm2. The resistivity for the former (the latter) increased from 102$\Omega$.cm (104$\Omega$.cw) to 1010$\Omega$.cm(1010$\Omega$.cm) as temperature changed from 2$0^{\circ}C$ to 9$0^{\circ}C$. The resistivity, 102$\Omega$.cm at room temperature for the former, was lower by order Q( two than that for the papostor made by the earlier reporter. The reproducibility, which has been an important Problem for this type of thermistors to be industrialized, was improved by introducing pressure in cooling procedure for both carbon and iron thermistors.
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$Fe_{1+x}V_{2-x}O_4$ Spinel의 부성저항특성
이길식,손병기,이종덕,Lee, Gil-Sik,Son, Byeong-Gi,Lee, Jong-Deok 대한전자공학회 1977 전자공학회지 Vol.14 No.3
Fe O 와 V O 를 적당한 mole비로 혼합하여 H -CO 분위기 중 1,100℃에서 10시간씩 5∼6회 반복소성하여 Fe V O Spinel을 제조하였다. 제조된 시편의 온도에 대한 저항률을 측정하고 이로부터 활성화에너지를 구해서 시편의 도전기구를 고찰하고, x, 주위온도, 시편의 두께 및 인가전압 상승률에 대한 I-V 특성곡선을 얻어서 부성저항 발생기구의 해명을 시도하였다. Fe V -O spinel의 도전은 주로 B자리의 Fe 와 F 사이의 전자 hopping에 기인되며, 부성저항은 filament형의 통전로에 기인되는 열적현상이라 생각된다. Fe V spinels were prepared by sintering the well-ground stoichiometric mixtures of Fe O and V O at 1,10$0^{\circ}C$ under H -CO atmosphere. The activation energy for electrical conduction decreases with increasing amount of iron. The tendency of activation energy depending on the amount of iron contained clarifies that the electrical condction of the spinel is mainly due to electron hopping between Fe and Fe ions at B sites. In the experiment for negative resistance characteristics, the threshold voltage (Vth) for the samples is related to ambient temperature, thickness and raising rate of applied voltage. Vth decreases as temperature increases while Vth increases linearly with thickness and Vth increases linearly with the raising rate of applied voltage in semi-logarithmic scale. These results lead to a conclusion that current paths mainly formed by thermal breakdown are ascribed to the negative resistance phenomena. Applying this property, these vanadium iron spinels may be used for switching elements.
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이우일,손병기,이건일,Lee, U-Il,Son, Byeong-Gi,Lee, Geon-Il 대한전자공학회 1970 전자공학회지 Vol.7 No.4
p-n junction에 있어서 microplasma전류의 selfheating에 의한 온도상승의 과도현상을 전류가 작은 경우와 큰 경우에 대해서 고찰하였다. 전류가 작은 경우에는 microplasma site의 온도상승과 전류의 감소는 비례하며 일반적인 시정수가 정해지나 큰 전류의 경우에는 일반적으로 복잡하며 시정수도 일반적으로 정해지지 않는다. Transient phenomena in the p-n junction due to the selfheating effect of microplasma current have been investigated for the cases of small current and of large current. For the small current case, the temperature rise of the microplasma site is proportional to the current decrease and a unique time constant could be defined. However, the situation was complicated for the case of large current, and the time constant was not uniquely defined.
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이한도 ( Han Do Lee ),김혜림 ( Hye Rim Kim ),김현정 ( Hyun Jung Kim ),최은화 ( Eun Hwa Choi ),손병기 ( Byeong Gi Son ),박정보 ( Jung Bo Park ),박주열 ( Ju Youl Park ),김태호 ( Tae Ho Kim ) 대한통합의학회 2013 대한통합의학회지 Vol.1 No.4
PURPOSE: The purpose of this study was to investigate the effects using pressure biofeedback and teaching abdominal hollowing exercise on pelvic stabilization during the active straight leg raising test. METHOD: The subjects were divided into 3 groups who were fourty eight healthy participants, aged 20~25 years recruited for this study. First group wad control group. This group didn`t any education. Second group was teaching them for a week. And last group was teaching abdominal hollowing exercise. The rotation angles of pelvic were measured by the motion anayalyser on flat surface and on form roll for the active leg raising. RESULT: Using pressure biofeedback and teaching abdominal hollowing exercise groups were significantly effective than control group in rotation angles of pelvis. And using pressure biofeedback group was more effective than teaching core stability muscles contraction group. CONCLUSION: This study suggested that patients with low back pain and pelvic instability can improve pelvic stabilization through pressure biofeedback and teaching abdominal hollowing exercise.
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