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이진탕(二陳湯) 가미방(加味方) 투여 후 호전된 기능성 소화불량 환자 3례에 대한 증례보고
김봉석,임희용,김동우,최빈혜,허진일,김대준,조종관,변준석,오중한,Kim, Bong-Suk,Lim, Hee-Yong,Kim, Dong-Woo,Choi, Bin-Hye,Hur, Jin-Il,Kim, Dae-Joon,Cho, Chong-Kwan,Byun, Joon-Seok,Oh, Jung-Han 대한한방내과학회 2005 大韓韓方內科學會誌 Vol.26 No.3
It is well known that functional dyspepsia is one of the most common diseases. Functional dyspepsia, as defined by Rome I and II criteria, is a known and important gastrointestinal disorder. Symptoms of functional dyspepsia are postprandial fullness, postprandial discomfort, epigastric bloating, epigastric lump sensation, early satiety, nausea, vomiting, regurgitation, eruction, hunger pain, postprandial epigastric pain, heartburn, soreness and anorexia. Treatment of these symptoms are recorded in the Donguibogam(東醫寶鑑). This study is a comparative study between initial medical examination and end of medical treatment with LJTG mentioned in the Donguibogam. After treatment with LJTG, patients showed improvement in all symptoms associated with functional dyspepsia, including general condition. The results of this study suggest that LJTG is an effective treatment for functional dyspepsia.
FBAR용 ZnO 박막의 열처리 온도변화에 따른 미세조직 및 전기적 특성
김봉석,강영훈,조유혁,김응권,이종주,김용성,Kim, Bong-Seok,Kang, Young-Hun,Cho, Yu-Hyuk,Kim, Eung-Kwon,Lee, Jong-Joo,Kim, Young-Sung 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.1
In this paper, we prepared high-quality ZnO thin films for application of FBAR (Film Bulk Acoustic Resonator) by using pulse DC magnetron sputtering. To prevent the formation of low dielectric layers between metal and piezoelectric layer, Ru film of 30 nm thickness was used as a buffer layer. In addition we investigated the influence of annealing condition with various temperatures. As the annealing temperature increased, the crystalline orientation with the preference of (002) c-axis and resistance properties improved. The single resonator which was fabricated at $500^{\circ}C$ exhibited the resonance frequency and the return loss 0.99 GHz and 15 dB, respectively. This work demonstrates potential feasibility for the use of thin film Ru buffer layers and the optimization of annealing condition.
전기 임피던스 단층촬영 기법에서 효과적인 초기치 설정을 통한 상 경계 추정
김봉석,김신,김경연,Kim, Bong-Seok,Kim, Sin,Kim, Kyung-Youn 한국전기전자학회 2012 전기전자학회논문지 Vol.16 No.3
상 경계 추정 문제에서는 초기치에 따라 그 추정성능이 달라질 수 있다. 하지만 실제의 유동 공정에서는 초기치 설정을 위한 기포의 개수와 개략적인 위치 정보를 알 수가 없기 때문에, 초기치 설정 문제는 더욱 중요하다. 따라서 이 논문에서는 상 경계 추정을 위한 초기치 설정을 위해 우선 차이(difference) 복원 방법을 사용하여 미지의 저항률 분포를 추정하고, 중간모드(intermodes) 방법을 사용하여 적응 문턱치를 자동으로 계산하였으며, 이를 바탕으로 기포의 개수와 초기 위치를 결정하였다. 이로써 잡음이 존재하는 경우에도 기포의 상 경계를 잘 추정할 수 있는 방법을 개발하였다. 이에 몇 가지 시나리오를 설정하고 모의실험을 통해 제안한 방법의 상 경계 추정성능을 평가하였다. In the phase boundary estimation problem, the estimation performance depends on the initial guess. However, there is no information on the number of bubbles and those positions for the initial guess in real flows. Therefore, it is very important to set appropriate initial guesses from prior information. In this paper, in order to set initial guesses for estimating the phase boundaries in two-phase flows, first, unknown resistivity distribution was estimated using the difference reconstruction method. After that, an adaptive threshold value was automatically computed using intermodes method. Based on this value, the number of bubbles and the initial position were determined. The numerical experiments have been performed to evaluate the estimation performance of the proposed method.
대승기탕(大承氣湯) 투여 후 편폐(便閉 ), 번조(煩燥), 불면(不眠)호전된 중풍 환자 치험 1례
김봉석,임희용,최빈혜,김대준,전연이,조종관,변준석,오중한,Kim, Bong-Suk,Lim, Hee-Yong,Kim, Dong-Woo,Choi, Bin-Hye,Kim, Dae-Joon,Jun, Yeon-I,Cho, Chong-Kwan,Byun, Joon-Seok,Oh, Jung-Han 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.2
In the early stage of stroke, the symptoms of constipation, chest discomfort and insomnia may appear in addition to the general symptoms such as specific limb weakness, dysphasia, headache, dizziness etc.. We administered Daeseungkitang(大承氣湯) to the patient diagnosed with cerebral infarction by MRI. He clearly displayed the usual syndromes of stroke(實證), endogenous wind stirring in the liver(肝風內動) and acceleration of upper chest functions(上焦火盛), ascertainned by Oriental Medical methods. After treatment with Daeseungkitang(大承氣湯), the constipation, chest discomfort and insomnia improved along with improvement of general symptoms of stroke.
Al Doped ZnO 박막의 열처리에 따른 태양전지용 투명전도막 특성
김봉석,김응권,김용성,Kim, Bong-Seok,Kim, Eung-Kwon,Kim, Young-Sung 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.9
The annealing temperature effect of transparent conducting oxide film grown on glass substrate for solar cell application was studied in this paper. Using pulsed DC magnetron sputtering with 1 at% Al-doped ZnO target, TCO films were deposited on coming 7059 glass at room temperature. Al:ZnO thin films were annealed at 200, 400, Al $600^{\circ}C$ for 10 min and annealing resulted in lower biaxial compressive stress of about 1GPa and increased average crystallite size in all films. The as-grown film shows the resistivity of $1{\times}10^{-2}{\Omega}{\cdot}cm$ and transmittance under 80%, whereas the electrical and optical properties of film annealed at $400^{\circ}C$ are enhanced up to $5{\times}10^{-4}{\Omega}{\cdot}cm$ and 85%, respectively.
폐옹(肺癰)으로 진단된 기관지확장증 환자의 위경탕(葦莖湯) 투여 1례
김봉석,오중한,김동우,최빈혜,허진일,손대용,김대준,변준석,임희용,Kim, Bong-Suk,Oh, Jung-Han,Kim, Dong-Woo,Choi, Bin-Hye,Hur, Jin-Il,Son, Dae-Yong,Kim, Dae-Joon,Byun, Joon-Seok,Lim, Hee-Yong 대한한방내과학회 2005 大韓韓方內科學會誌 Vol.26 No.3
A 69 year-old female patient with Bronchiectasis was treated. She was suffering from cough, sputum, fever, sweating, chills and general weakness. Her symptoms were diagnosed as Pe-Ong(肺癰), and she was administered Wikyung-Tang(葦莖湯). After taking Wikyung-Tang(葦莖湯) her symptoms improved. Results suggest that Wikyung-Tang(葦莖湯) is an effective treatment fer Bronchiectasis. Though, results support a role for oriental medical treatment for lung disease, further research into the effectiveness of oriental medical treatments for various lung disease is needed.
경두개 도플러 초음파를 이용한 현훈 환자의 뇌혈관 혈류 측정에 관한 임상적 연구 (중대뇌동맥, 추골동맥 및 기저동맥을 중심으로)
김봉석,오중한,김동우,최빈혜,장우석,서영호,손대용,변준석,임회용,Kim, Bong-Suk,Oh, Jung-Han,Kim, Dong-Woo,Choi, Bin-Hye,Jang, Woo-Seok,Seo, Young-Ho,Son, Dae-Yong,Byun, Joon-Seok,Lim, Hee-Yong 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.3
Objectives : This study was designed to research whether transcranial doppler ultrasound(TCD) can yield a suitable diagnosis or prognosis for dizziness. Methods : To evaluate the blood flow, we measured the mean velocity(Vm), peak systolic velocity(Vs) and pulsatility index(PI) of the middle cerebral artery(MCA), vertebral artery(VA) and basilar artery(BA) in 54 dizziness patients and 44 normal subjects. To investigate the difference between dizziness patients and normal subjects, we selected 54 dizziness patients diagnosed normal by Brain MRI, and 44 normal subjects who did not have any symptoms of hyperlipemia, hypertension, diabetes melitus, heart disease, or smoking, diagnosed normal by Brain MRI. 30-69 year olds were divided into 30-49 year olds, 50-59 year olds and 60-69 year olds. Results : In normal subjects, there was a significantly higher Vm, Vs in the MCA and BA, and Vs in the VA of female subjects, and there was a significant difference in PI in the MCA and BA increasing with age. In comparison with normal subjects, dizziness patients had a significantly lower Vm in the BA. Male dizziness patients had significantly lower PI in the MCA. 30-49 year olds had significantly lower Vm in the BA. Conclusions : The significant difference in blood flow velocities in the BA between dizziness patients and normal subjects suggests that dizziness is related to blocking of blood flow in the BA and that diagnosis and prognosis can be made through TCD. More detailed study of dizziness patients will be needed.
유전체 장벽 방전을 이용한 오존 발생기의 전원장치 최적 설계 및 비교
김봉석,신영철,고광철,Kim, Bong-Seong,Shin, Young-Chul,Ko, Kwang-Cheol 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.1
Dielectric Barrier Discharge (DBD) reactor with sinsodual AC type of power supply is very widely adopted for its compact size and effective discharging mechanism to generate high density of ozone radicals. However, at the aspect of design on power supply, its optimal switching conditions and topology is achieved by empirical test. Therefore, throughout this paper, it is proposed a design method of DBD power supply to guarantee a maximum ozone yield rate in accordance with DBD reactor modification and impedance variation when rapid gas discharging in the DBD reactor is proceeded.
전기 임피던스 단층촬영 기법에서 수정된 가우스-뉴턴 방법을 이용한 도전율 영상 복원
김봉석,박형준,김경연,Kim, Bong Seok,Park, Hyung Jun,Kim, Kyung Youn 한국전기전자학회 2015 전기전자학회논문지 Vol.19 No.2
Electrical impedance tomography is an imaging technique to reconstruct the internal conductivity distribution based on applied currents and measured voltages in a domain of interest. In this paper, a modified Gauss-Newton method is proposed for conductivity image reconstruction. In the proposed method, the dimension of the inverse term is reduced by replacing the number of elements with the number of measurement data in the conductivity updating equation of the conventional Gauss-Newton method. Therefore, the computation time is greatly reduced as compared to the conventional Gauss-Newton method. Moreover, the regularization parameter is selected by computing the minimum-maximum from the diagonal components of the Jacobian matrix at every iteration. The numerical experiments with several scenarios were carried out to evaluate the reconstruction performance of the proposed method. 전기 임피던스 단층촬영 기법은 전극들을 통해 전류를 주입하고 이에 유기되는 전압을 측정한 후, 이들 데이터를 기반으로 내부의 도전율 분포를 영상으로 복원하는 방법이다. 이 논문에서는 기존의 Gauss-Newton 방법의 역행렬 항목의 차원을 도메인의 원소의 개수가 아닌 데이터의 개수의 차원으로 바꿔줌으로써, 관심 도메인 내부의 도전율 분포를 보다 빠르게 추정할 수 있는 방법을 제안하였다. 그리고 자코비안 행렬의 대각성분의 최소-최대를 이용하여 조정인자를 계산하는 방법을 함께 제안하였다. 몇 가지 시나리오를 설정하고 모의실험을 통해 제안한 방법의 복원 성능을 비교분석하였다.