• 한국전기전자재료학회논문지
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• 제27권3호
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• pp.167-171
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• 2014

This paper examines the destruction behavior of NPN BJT (bipolar junction transistor) by repetition pulse. The injected pulse has a rise time of 1 ns and the maximum peak voltage of 2 kV. Pulse was injected into the base of transistor. Transistor was destroyed, current flows even when the base power is turned off. Cause the destruction of the transistor is damaged by heat. Breakdown voltage of the transistor is 975 V at single pulse, and repetition pulse is 525~575 V. Pulse repetition rate increases, the DT (destruction threshold) is reduced. Pulse Repetition rate is high, level of transistor destruction is more serious.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제49권1호
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• pp.37-43
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• 2000

In this experimental study we proposed the double dielectric barrier discharge (DDBD) reactor to produce as high an electric field as possible. The experiment are conducted for applied voltage from 15 to 20[kV], $1~4[\ell/min]$ of gas flow rate and 120[Hz] and 240[Hz] of pulse rate. Superposition discharge(SPD) generated in DDBD which combined the surface discharge with the silence discharge was the most effective to reduce the $NO_x$. In the decomposition efficiency per watt, the low pulse rate gave better efficiency than the high pulse rate. However in DeNOx rate, the high pulse rate gave better performance than the low pulse rate. $NO_x$ removal rate and efficiency increased with increasing the applied voltage in all reactors.

• 한국인공지능학회지
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• 제6권1호
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• pp.11-15
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• 2018

The purpose of this study is to develop a pulsatile drowsiness detection system that can compensate the limitations of existing camera - based or breathing pressure sensor based Drowsiness driving prevention systems. A heart rate sensor mounted on the driver's finger and an alarm system that sounds when drowsiness is detected. The heart rate sensor was used to measure pulse changes in the wrist, and an alarm system based on the Arduino, which works in conjunction with the laptop, generates an audible alarm in the event of drowsiness. In this paper, we assume that the pulse rate of the drowsy state is 60 ~ 65 times / minute, which is the middle between the awake state and the sleep state. As a result of the experiment, the alarm sounded when the driver's pulse rate was in the drowsy pulse rate range. Based on these experiments, the drowsiness detection system was able to detect the drowsiness of the driver successfully in real time. A more effective drowsiness prevention system can be developed in the future by incorporating the results of the present study on a pulse-based drowsiness prevention system in an existing drowsiness prevention system.

• 한국정보통신학회논문지
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• 제9권5호
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• pp.1117-1122
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• 2005

본 논문은 광섬유 루프 결합기를 이용한 고반복률의 펄스 발생에 대해 연구하였다. 최근 OTDM에서, 고 반복률 광 펄스의 개발이 필요하다. 이것은 광섬유나 집적화된 도파관 지연 선로 회로들 일반적인 접근법과 차이가 있다. 고 반복율 광펄스 다중 현상은 광펄스들의 분리 폭이 사용된 결합기의 전달대역폭보다 더 클 때 발생한다. 분석으로, 출력 반복율은 서로 다른 등가 전송 대역폭인 광섬유 결합기를 이용하여 조절될 수 있다 분리간격은 직렬의 광루프 미러 결합기 수를 조절함으로서 얻을 수 있다.

• Journal of Communications and Networks
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• 제11권3호
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• pp.271-278
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• 2009

A new modulation scheme called multicoded-pulse position modulation (MC-PPM) is proposed for an ultrawideband (UWB) impulse radio communication system. The multicoded signal is generated by using several orthogonal codes for transmitting data simultaneously. Then, each multi-level value of the multicoded signal is converted to pulse position which results in not only an improved data rate, but also a processing gain in reception, delivering the power-efficient benefit of PPM and guaranteeing the low pulse energy for UWB systems. We notice that the modulation of multi-level values of the multicoded signal to pulse position is more efficient in terms of achievable data rate than the modulation of transmitting data based on other PPM schemes within given bandwidth and pulse energy. Therefore, as a performance measure, we focus on the achievable data rate (link capacity) of the proposed scheme and analyze it theoretically. Through simulation, we compare the link capacity of the MC-PPM scheme and other PPM schemes, such as M -ary PPM and multiple PPM. With the fixed bandwidth and same pulse energy condition, the UWB system based on the proposed MC-PPM scheme shows good link capacity and an increased data rate as L increases, which is contrary to other PPM schemes.

• 동의생리병리학회지
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• 제21권6호
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• pp.1670-1675
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• 2007

The pulse diagnosis studies reported to date has mainly been performed to clinically reveal the pulse wave characteristics according to the specific diseases, whereas no attempts have been made to study the effects on the pulse wave characteristics of the daily activities such as taking meals, exercise, and sleep, etc. This work reports the effect of feeding stimulus on the healthy subjects on the pulse wave pattern which has quantitatively been analyzed using the objective model for the pulse diagnosis in oriental medicine. The pulse waves right before/after the meal and 30 minutes after the meal were measured using the pulse analyzing equipment (3D-Mac, Daeyo Medi, Korea) and at the same time oriental medicine doctors' diagnoses were given. The pulse parameters obtained from the equipment and clinical records on the subjects were statistically processed and the variables showing statistically significant differences were analyzed. The results indicate that the pulse pressure, the pulse rate, and the respiratory rate increase while the blood pressure decreases after the meal. For the floating/sinking and the deficient/excess coefficients characterizing the pulse states described in the oriental medicine, the floating/sinking coefficients were observed to decrease whereas the deficiency/excess coefficients increase after the meal. The results indicates that besides the standard bio-indicators like blood pressure and respiratory rate, etc., the pulse wave characterization in terms of the pulse classifications in the oriental medicine using the floating/sinking, deficient/excess pulse states provide an important piece of biomedical information.

• Journal of Ginseng Research
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• 제19권1호
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• pp.1-16
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• 1995

Effects of Korean red ginseng (KG) and western ginseng (WG) on body temperature, pulse rate, clinical symptoms and hematological changes in human were studied after administration p.o. with Korean red ginseng and western ginseng for 10-days. KG was more effective in keeping homeostsis in than western ginseng in the changes of body temperature and pulse rate. KG was more effective in low body temperature and SOEVMIN (소음인), while inducing tachycardia especially in SOYANGIN (소양인) and TAEEUMIN (태음인). WG tended to drop temperature abruptly and also descended pulse rate with greater range than KG. KG and WG could cause side effects such as headache and gastrointestinal syndromes and induce hypertension or hypotension abruptly in specific constitutions. However, KG and WG did not cause abnormal changes in urinalysis and hematology.

• 대한암한의학회지
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• 제26권1호
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• pp.29-37
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• 2021

Objectives: The purpose of this study is to examine whether heart rate variability (HRV) and pulse wave of cancer patients can be used as indicators of their health status and prognosis. Methods: We retrospectively compared HRV, pulse wave and body mass index (BMI) of cancer patients and healthy individuals who visited W hospital from November of 2020 to October of 2021. Results: As a result of comparing HRV and pulse wave parameters between cancer patients and healthy subjects, among HRV indices, mean heart rate (MHR), standard deviation of normal to normal (SDNN) and total power (TP), very low frequency (VLF) showed significant differences between two groups. Cancer patients' pulse wave parameters showed more rapid and superficial than that of healthy subjects. Also, cancer patients weighed less and had lower BMI. Conclusion: For increased MHR, decreased SDNN, rapid and superficial pulse wave can be indicators of poor prognosis of cancer patients, keep monitoring HRV and pulse wave can help to manage patients efficiently.

• Journal of Yeungnam Medical Science
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• 제3권1호
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• pp.81-85
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• 1986

저자는 enflurane을 사용한 200예의 전신마취 시술하에서 혈압 및 맥박의 변화상을 이론식을 도입하여 시계열형(時系列型)으로 표현하여 실현된 형(型)의 유별(類別)과 분포상태를 분석하였던바 다음과 같은 결과를 얻었다. 1. 삽관시 혈압 및 맥박이 상승한다. 2. 삽관시 혈 압 및 맥박이 상승하였다가 하강하여 20분 이내에 대체로 안정상태로 되었다. 3. 구조상으로 상승하강동치이행 (ADEE) 형이 73~74%로 가장 많았고 다음은 상승동치이행(AEEE)형이 40~44%였다.

• Journal of Korean Biological Nursing Science
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• 제5권2호
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• pp.31-39
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• 2003

The purpose of this study was to test the effect of guided imagery on blood pressure and pulse rate. The subjects were thirty-nine nursing students in I university located in Busan, Korea To enhance the effect of treatment, they were trained getting themselves absorbed in guided imagery on three different occasions before the study. Actually in the study, the subjects were given instruction in Mason's guided imagery for 19 minutes and 58 seconds. Blood pressure and pulse rate were measured before and after guided imagery application. The data were analyzed through paired t-test. The Results were as follows : 1) There was a significant decrease in systolic blood pressure after the use of guided imagery. 2) There was no significant decrease in diastolic blood pressure after the use of guided imagery. 3) There was a significant decrease in pulse rate after the use of guided imagery. These results indicate that guided imagery is a helpful technique for decreasing blood pressure and pulse rate, which are increased in stress condition.