기능성 소화불량증 환자 3인에 대한 평가 및 증례보고

김진석,홍종희,홍상선,임중화,한숙영,김진성,윤상협,류봉하,류기원,박석규,Kim, Jin-Seok,Hong, Jong-Hee,Hong, Sang-Sun,Lim, Joong-Hwa,Han, Sook-Young,Kim, Jin-Seong,Yoon, Sang-Hyub,Ryu, Bong-Ha,Ryu, Ki-Won,Park, Seok-Kyu 대한한방내과학회 2002 대한한방내과학회지 Vol.23 No.2

Functional dyspepsia refers to upper abdominal pain or discomfort with or without symptoms of early satiety, nausea, or vomiting with no definable organic cause. In this study, we recognized that dyspepsia was decreased with herbal medication (Banhabakchulchunma-tang) and acupuncture therapy. And we aimed to evaluate the Gastrointestinal Symptoms Rating Scale (GSRS) in these cases. The GSRS indicated that Oriental medicine treatment could be effective in the Functional dyspepsia. And it is helpful in decreasing symptoms of patients and in improving quality of life.

반응성 공중합체들을 이용한 습도센서의 감습 특성

김진석,배장순,공명선,Kim, Jin-Seok,Bae, Jang-Sun,Gong, Myeong-Seon 한국재료학회 2001 한국재료학회지 Vol.11 No.2

The mutually reactive copolymers poly[(vinylbenzyl chloride)-co-(n-butyl acrylate)-co-(2-hydroxyethyl methacrylate)] and poly[(4-vinylpyridine)-co-(n-butyl acrylate)-co-(2-hydroxyethyl methacrylate)] were synthesized for the humidity sensitive material by forming simultaneous quaternization. The humidity sensor showed an average resistance of 8.6 M$\Omega$, 310 k$\Omega$ and 12 k$\Omega$ at 30%RH, 60%RH and 90%RH, respectively. The hysteresis and temperature coefficient were $\pm$3%RH and -0.37~-0.40%RH/$^{\circ}C$. The introduction of n-BA and HEMA increased the resistance of the humidity sensor however it enhanced the adherence to the alumina substrate. The response time was 54 seconds changing from 33%RH to 85%RH and the difference of resistance was +0.2%RH after soaking in water for 2 hr.

일본의 전자파에 대한 인체보호지침

김진석,최익권,Kim, Jin-Seok,Choe, Ik-Gwon 한국전자통신연구원 1991 전자통신동향분석 Vol.6 No.4

근래 정보화의 진전에 따라 전파이용분야의 수요가 높아지고 있으며 이러한 가운데 전파이용시설로부터 방사되는 전파가 인체에 나쁜 영향을 미치지 않을까 하는 불안과 의문이 제기되고 있다. 연구보고에 의하면 생체가 강한 전자파에 노출되는 경우 눈의 백내장 형성, 성기능 장해, 열적 손상, 경련, 행동 둔화 등의 생체작용이 일어나는 것으로 밝혀지고 있다. 그러나 무선통신시설을 비롯한 각종 전파이용시설로부터 방사되는 전파로 일상생활 범위에 있어서 염려하는 바와 같은 생체작용이 일어나는 일은 거의 없을 것으로 생각된다. 그러나 전파이용시설로부터 인체를 안전하게 보호하고 전파이용에 대한 공연한 오해와 불안을 방지하기 위하여 전파의 에너지 양과 생체작용과의 관계를 정량적으로 확실히 하는 일이 중요하며 이에 근거하여 전파로부터 인체를 보호하기 위한 안전기준을 제시하는 것이 요구되고 있다. 현재 미국, 일본, 독일, 영국, 캐나다 등 세계 여러 나라에서 전자파의 안전기준을 제시하고 있으나 우리나라에서는 아직 이러한 기준이 마련되어 있지 않다. 다음은 1990년 일본 (전기통신기술심의회) 에서 발표한 "전파이용에 있어서의 인체보호지침"을 발췌.요약한 것이다.

공기 중 아르곤 0.016% 더 많다

김진석,Kim, Jin-Seok 한국과학기술단체총연합회 2005 과학과 기술 Vol.38 No.2

하이브리드 다기능 용접기 제어 모드에 관한 연구

김진석,정양권,최재호,Kim, Jin-Seok,Choi, Jae-Ho,Jeong, Yang-Kwon 한국전자통신학회 2013 한국전자통신학회 논문지 Vol.8 No.3

This study is on the system that can integrate generator and charger to use as a welder and generator for need. Specifically, it was hybrid generator consisted with select switch to use generator controller and multiple function welder, that function were auto-stopping generator when generator power finish to recharge in recharger battery and Co2 MMA TIG MIG MAG are devide depend on supplying gas. This control system of voltage, high-frequency, motor and gas valve was implemented in order to improve the performance and convenience of existing welders to choose only one or two at a time.

현장통신 - "우리에겐 희망의 근거가 있다"

김진석,Kim, Jin-Seok 대한출판문화협회 2002 출판저널 Vol.315 No.-

성인 남성에서 흡연이 기도청력역치에 미치는 영향

김진석,예민해,천병렬,우극현,강윤식,김건엽,이영숙,Kim, Jin-Seok,Yeh, Min-Hae,Chun, Byung-Yeol,Woo, Kuck-Hyeun,Kang, Yune-Sik,Kim, Keon-Yeop,Lee, Young-Sook 대한예방의학회 1998 예방의학회지 Vol.31 No.2

To investigate the effect of smoking on the hearing threshold, 1,887 adult male workers who visited health care center during the period 1 January 1996 - 31 July 1997 were selected. Air-conduction hearing threshold level, diastolic blood pressure(DBP), total cholesterol, fasting blood sugar(FBS), hematocrit and obesity were measured. The data on age, occupation, and smoking were collected. Air-conduction hearing threshold in smoker was significantly higher than non-smoker in categories of 250, 500, 1000 and 4000 Hz(p<0.05). Mean values of PTA-low, PTA-mid, and PTA-high in smoker were also significantly higher than non-smoker(p<0.05). In multiple regression analysis, smoking is likely to play a significant role after controlling age, occupation, DBP, FBS, total cholesterol, hematocrit, and obesity(p<0.05). The hearing threshold was significantly increased with increasing age(p<0.05), the manufacturing worker may have higher hearing threshold(p<0.05). The higher hematocrit and the more obese, the higher hearing threshold(p<0.05). However, DBP, total cholesterol and FBS were not significantly related with hearing threshold level. In conclusion, smoking was significantly related with the hearing threshold level in adult men.

코히어런트 다중 표적 방위 추적 알고리즘

김진석,김현식,박명호,남기곤,황수복,Kim Jin-Seok,Kim Hyun-Sik,Park Myung-Ho,Nam Ki-Gon,Hwang Soo-Bok 한국음향학회 2005 韓國音響學會誌 Vol.24 No.4

수중음향 시스템에서는 이동 표적에 대한 상태 추정 및 표적 식별 등의 목적을 위해서 표적 방위 추적은 필수적이다. 그러나 감시영역에 근접 또는 교차 표적 등이 존재하는 다수 표적 상황에서의 방위 추적은 매우 어려운 문제로 다양한 접근방법으로 연구되어 왔다. SWORD는 배열 센서 신호의 출력 공분산 행렬로부터 방위 변위를 추정하여 표적을 추적함으로써 별도의 정보 연관 과정이 필요 없는 단순한 구조의 다중 표적 방위 추적 알고리즘을 제안하였으며, RYU 등은 표적 조향 벡터 (target steering vector)와 배열 센서 공분산 행렬의 신호 고유 벡터 (signal eigenvector)가 선형결합 관계임을 이용하여 교차 표적 (cross target)에 대해서도 우수한 성능을 나타내는 효율적인 알고리즘을 제안하였다. 또한 HWANG 등은 잡음 고유 벡터 (noise eigenvector)와 표적 조향 벡터가 직교 관계임을 이용하여 RYU의 알고리즘과 동일한 성능을 유지하면서 연산량을 개선한 알고리즘을 제안하였다. 그러나 기존의 방법은 코히어런트 (coherent) 다중 표적인 경우에는 추적 성능이 저하되는 단점이 있다. 본 논문에서는 배열 센서의 공분산 행렬로부터 추정할 수 있는 신호 고유 벡터와 잡음 공분산 행렬 (noise covariance matrix)의 특성을 이용하여 코히어런트 다중 표적에 대해 추적 성능을 유지할 수 있는 다중 표적 방위 추적 알고리즘을 제안하였으며, 근접 및 교차 기동하는 표적에 대한 시뮬레이션을 통하여 비코히어런트 (incoherent)와 코히어런트 다중 표적에 대해 추적 성능이 우수함을 확인하였다. The angle-tracking of maneuvering targets is required to the state estimation and classification of targets in underwater acoustic systems. The Problem of angle-tracking multiple closed and crossing targets has been studied by various authors. Sword et al. Proposed a multiple target an91e-tracking algorithm using angular innovations of the targets during a sampling Period are estimated in the least square sense using the most recent estimate of the sensor output covariance matrix. This algorithm has attractive features of simple structure and avoidance of data association problem. Ryu et al. recently Proposed an effective multiple target angle-tracking algorithm which can obtain the angular innovations of the targets from a signal subspace instead of the sensor output covariance matrix. Hwang et al. improved the computational performance of a multiple target angle-tracking algorithm based on the fact that the steering vector and the noise subspace are orthogonal. These algorithms. however. are ineffective when a subset of the incident sources are coherent. In this Paper, we proposed a new multiple target angle-tracking algorithm for coherent and incoherent sources. The proposed algorithm uses the relationship between source steering vectors and the signal eigenvectors which are multiplied noise covariance matrix. The computer simulation results demonstrate the improved Performance of the Proposed algorithm.

토널 신호 간섭에 강인한 데몬 처리 기법

김진석,황수복,이철목,Kim, Jin-Seok,Hwang, Soo-Bok,Lee, Chul-Mok 한국음향학회 2012 한국음향학회지 Vol.31 No.6

Passive sonars employ DEMON(Detection of Envelope Modulation on Noise) processing to extract propeller information from the radiated noise of underwater targets. However, the conventional DEMON processing suffers from the interference of tonal signals because it extracts propeller signals and some types of tonal signals as well. If there are some tonals in the frequency band for DEMON processing, the conventional DEMON processing may additionally extract frequency informations originated from the interaction between different tonals. In this paper, we propose a modified DEMON processing, which can eliminate the interference of the tonals. The proposed algorithm removes tonals in DEMON processing band before demodulation processing, hence results the robustness to the interference of the tonals. Some numerical simulations demonstrate the improved performance of the proposed algorithm against the conventional algorithm.

$SnO_2$ 박막을 이용한 ${Ta_2}{O_5}$박막 커패시터의유전특성

김진석,정강민,이문희,Kim, Jin-Seok,Jeong, Gang-Min,Lee, Mun-Hui 한국재료학회 1994 한국재료학회지 Vol.4 No.7

Our investigation aimed to reduce the leakage current of $Ta_2O_5$ thin film capacitor by layering SnOz thin film layer under Ta thin film, thereby supplying extra oxygen ions from the $SnO_{2}$ underlayer to enhance the stoichiometry of $Ta_2O_5$ during the oxidation of Ta thin film. Tantalum was evaporated by e-beam or sputtered on p-Si wafers with various deposition temperatures and was oxidized by dry--oxygen at the temperatures between $500^{\circ}C$ and $900^{\circ}C$. Aluminum top and bottom electrodes were formed to make Al/$Ta_2O_5$/p-Si/Al or $Al/Ta_2O_5/SnO_2$p-Si/AI MIS type capacitors. LCR meter and pico-ammeter were used to measure the dielectric constants and leakage currents of the prepared thm film capacitors. XRD, AES and ESCA were employed to confirm the crystallization of the thin f~lm and the compositions of the films. Dielectric constant of $Ta_2O_5$ thin film capacitor with $SnO_{2}$ underlayer was found to be about 200, which is about 10 times higher than that of $Ta_2O_5$ thin film capacitor without $SnO_{2}$ underlayer. In addition, higher oxidation temperatures increased the dielectric constants and reduced the leakage current. Higher deposition temperature generally gave lower leakage current. $Ta_2O_5/SnO_2$ capacitor deposited at $200^{\circ}C$ and oxidized at $800^{\circ}C$ showed significantly lower leakage current, $10^{-7}A/\textrm{cm}^2$ at $4 \times 10^{5}$V/cm, compared to the one without $SnO_{2}$ underlayer. XRD showed that $Ta_2O_5$ thin film was crystallized above $700^{\circ}C$. AES and ESCA showed that initially the $SnO_{2}$, underlayer supplied oxygen ions to oxidize the Ta layer, however, Sn also diffused into the Ta thin film layer to form a new $Ta_xSn_YO_Z$ , ternary oxide layer after all.