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박찬원,전찬민,박희석 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-
A wearable electrodiagram(ECG) monitoring system is a widely used non-invasive diagnostic tool for ambulatory patients who may be at risk from latent life-threatening cardiac abnormalities. In this paper. we have a portable ECG monitoring system with conductive fiber characterized by the small-size and the low power consumption. The system consists of conductive fibers, one-chip microcontroller, ECG preprocessing circuit, and monitoring software to record and analyze in PC. ECG preprocessing circuit is made of pre-amplifier with gain of 10, band-pass filter with bandwidth of 0.5-120% and 2.5V offset circuit for A/D conversion. ECG signals obtained by sensor are corrupted by noises such as a baseline wandering, 60Hz power noise and interference noise by body movement. For cancellation of noises in signals obtained by conductive fiber, we used the wavelet decomposition of wavelet transforms in MATLAB toolbox.
산부식가공의치(酸腐植架工義齒)의 금속피착면(金屬被着面)에 관(關)한 연구(硏究)
박찬원,Park, Charn-Woon 대한치과보철학회 1991 대한치과보철학회지 Vol.29 No.2
The purpose of this study was to evaluate the tensile bond strengths of treated alloy surfaces for resin bonded retainers. For the experiment metal surfaces of 5 alloys were teated with sandblasting, Silicoating Rocatec, and cemented with Visio-Gem. All specimens divided into two groups. The group I specimens were treated with 24-hour immersion in $37^{\circ}C$ distilled water, and group II specimens were teated with 1500 thermo-cycles from $5^{\circ}C\;to\;55^{\circ}C$. The obtained results were as follows: 1. Bond strength values showed significantly different between sandblasting group and other groups after a 24-hour immersion in $37^{\circ}C$ distilled water(P<0.05). 2. All samples were fractured during thermo-cycles for sandblasting group, and bond strength values for Silicoating and Rocatec groups showed significantly different after 1500 thermo-cycles from $5^{\circ}C\;to\;55^{\circ}C$.
Measurement and Estimation of Renal Size by Computed Tomography in Korean Children
박찬원,유나리,윤신원,채수안,이나미,이대용,최영배,임인석 대한의학회 2017 Journal of Korean medical science Vol.32 No.3
Adequate organ growth is an important aspect of growth evaluation in children. Renal size is an important indicator of adequate renal growth; computed tomography (CT) can closely estimate actual kidney size. However, insufficient data are available on normal renal size as measured by CT. This study aimed to evaluate the relationships of anthropometric indices with renal length and volume measured by CT in Korean pediatric patients. Renal length and volume were measured using CT images in 272 pediatric patients (age < 18 years) without renal disease. Data for anthropometric indices—including height, weight, and body surface area (BSA)—were obtained using medical records. Using the equation for an ellipsoid, renal volume was calculated in cubic centimeters. Height showed greatest correlation with renal length on stepwise multiple linear regression analysis; BSA showed the strongest significant correlation with renal volume. The mean renal size for each age group and height group was determined; it showed a tendency to increase with age and height. This is the first Korean study to report the relationship between body indices and renal size measured by CT. These results can serve as normative standards for assessing adequate renal growth.
박찬원 강원대학교 정보통신연구소 2000 정보통신논문지 Vol.4 No.-
This paper describes a power interrupt tester which is highly suitable for microprocessor-based hardware test device for safety guarding systems. Single-chip microcontroller is employed to generate power interrupt signal, and the built-in software controls peripheral hardwares with many functions. The system uses the design concept of deverse redundancy and software algorithms as well as additional functions which is useful in practical use. Experimental results showed that the proposed system is effective enough to practical applications and can provide an good application tool for the electronic appliance manufacturer as a test device of hardware and software debugging.
박찬원 강원대학교 정보통신연구소 2013 정보통신논문지 Vol.17 No.-
This work presents a signal processing device for relative humidity sensor which is made with a CNT(carbon nanotube) thin films. Using this CNT humidity sensor, we also have successfully developed a small, sensitive signal processing device for relative humidity detector, that is a module for accurate air quality monitoring systems in building HVAC(heating, ventilating, and air conditioning) system and automotive applications. This paper shows the sensor signal conditioning and processing device for humidity sensor application by developing a hardware of the circuit for CNT humidity sensor, and a software for its control and sensor signal processing. The experimental results show that this technique is effective in utilizing the performance of the humidity sensor signal processing device.