• 한국군사과학기술학회지
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• 제21권3호
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• pp.342-348
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• 2018

The important issue of equipment installed in maritime weapon system is shock survivability against underwater explosion(UNDEX). If the shock survivability of equipment should not be guaranteed, the successful mission also could not be achieved. For that reason, the shock-resistance of each equipment under UNDEX environment should be demonstrated before deployment at combat field. However, the actual UNDEX test on the ocean is too expensive to conduct. Also, it has diverse dangerous factors. The main characteristic of UNDEX is a dual-pulse shock. The vertical shock test machine able to simulate dual pulse shock signal on the ground will be introduced in this paper. The dual-pulse shock signal presented in certain shock standard was achieved with this shock-test machine on the ground. The analytical procedure to set a test condition was verified by comparing simulation result with experiment result.

• Journal of Magnetics
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• 제18권2호
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• pp.183-187
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• 2013

Two concurrent signals of the pulse wave measured from both hands' radial artery in un-pressurization condition using the prototype model of two clip-type pulsimeters with a permanent magnet and Hall device are investigated. The phase differences of two pulse waves from 22 subjects have some distinct points according to the handedness. Thus, the propagation of the pulse wave calculated from phase difference is both fast and slow to each other. It is confirmed that this phenomenon comes from the difference of blood vessel hardness between right- and left-hand of each subject rather than a quantity of muscle.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.254-257
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• 2004

In shallow water, the performance of the operating active sonar systems is usually limited by reverberation. One of the measure to overcome the negative effect of reverberation is of selecting an adequate transmission pulse. SFM(Sinusoidal Frequency Modulation) pulse has been received a considerable attention as a candidate for suppressing the reverberation effect. In this paper, we analyze the detection performance of SFM pulse with respect to modulation frequency and bandwidth. To conduct the analysis. we synthesize the signal at the receiver considering. the transmitter. the receiver, and the propagation medium characteristcs. The simulations provide the optimum modulation frequency and bandwidth under the given situation.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제55권1호
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• pp.40-44
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• 2006

In this paper, the distortion characteristics of an electrical pulse which has a rise/fall time due to the dispersion and the reflection, on nonuniform tapered microstrip lines has investigated in time domain. The transmission characteristics on uniform microstrip lines in time domain had represented already, but the results for the nonuniform tapered microstrip lines not represented yet. We investigated the transmission characteristics for pulse signal on the nonuniform tapered microstrip lines, and the result applied to design of wide band impedance matching circuit in design of MMIC. The voltage and current transfer functions are shown for the tapered line. The dispersion and distortion obtained by using these transfer functions are represented for the nonideal square pulse.

• 한국전기전자재료학회논문지
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• 제32권3호
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• pp.241-245
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• 2019

This work presents the response characteristics of a ZnO varistor to conductive EMP. An E1 pulse, standardized to MIL-STD-188-125-1, was applied to the varistors wherein the residual current and response times were measured with the applied E1 pulse current. Additionally, the response time was measured according to the length of the connection path. Consequently, the amplitude of the residual voltage through the ZnO varistors was increased with increasing amplitude of the applied E1 pulse current. As the length of the connection path increased, the operating response time and residual peak voltage also increased. These results indicate that the response characteristics of ZnO varistors can be applied to basic data to support the use of varistors as a protective measure against conductive EMP.

• 대한임상검사과학회지
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• 제47권1호
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• pp.28-34
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• 2015

Pulse wave velocity (PWV) is used to non-invasively estimate the severity of arteriosclerosis by measuring arterial stiffness. Increased arterial stiffness measured by PWV stands for progressive arteriosclerosis and is caused by atherosclerotic risk factors. This study is focused on how brachial-ankle pulse wave velocity (baPWV) is related to the leading risk factors for arteriosclerosis or atherosclerosis. Subjects were 114, 69 males and 45 females who are in 60's and had baPWV test for acute stroke. The results are as follows: the group with increased arterial stiffness showed significant increase in HbA1c, total cholesterol, BSBP (brachial artery systolic blood pressure), BDBP (brachial artery diastolic blood pressure), CSBP (central artery systolic blood pressure), CDBP (central artery diastolic blood pressure), augmentation index (AIx) and diabetes mellitus. Correlation analysis between baPWV and atherosclerotic risk factor showed significant relationship in age, HbA1c, LDL cholesterol, BSBP, BDBP, CSBP, CDBP and augmentation index. baPWV was independently related to age and BSBP in multiple linear regression analysis. The group with increased arterial stiffness was independently related to BDBP in multiple logistic regression analysis. This study might be meaningful in evaluating the relationship between arterial stiffness and atherosclerotic risk factor in a new way, and be helped to make various studies for cardiovascular disease.

• 한국인터넷방송통신학회논문지
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• 제17권5호
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• pp.137-142
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• 2017

인구의 고령화와 의료서비스 수요의 증가로 한의학의 이론을 기초로 한 의료기기 개발이 증가하고 있다. 개발한 의료기기의 임상적 유효성 확보를 위한 다양한 임상시험들이 수행되고 있으며, 이 과정에서 다양하게 수집되는 정보들의 체계적인 관리의 중요성이 증가하고 있다. 본 논문에서는 한의학의 대표적인 진단 방법인 맥진을 기기화 한 맥진기를 이용하여 임상시험을 진행하는데 있어 환자의 의학적 정보, 맥진기의 측정 정보들을 체계적으로 관리할 수 있는 데이터베이스를 설계하고 구축하였다. 구축된 데이터베이스는 임상시험에 대한 다양한 정보 및 측정된 정보의 질관리를 통해 기존 알고리즘 검증 또는 새로운 알고리즘 개발 시 효율적인 대응이 가능하고, 임상 데이터의 통제 측면에서도 여러 장점들을 가지고 있다. 본 연구의 결과는 이종의 맥진기나 다른 생체신호 측정기와의 정보 공유가 가능한 통합 데이터베이스 관리 시스템 구축을 위한 한의 의료기기 데이터 표준안 구성에 기여할 수 있을 것이다.

• 동국한의학연구소논문집
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• 제8권2호
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• pp.131-154
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• 2000

<난경(難經)>은 <내경(內經)>의 사상(思想)을 보다 자세(仔細)하고 심도(深度)있게 문답(問答)을 가설(假說)하여 의난(疑難)을 해석하는 방식으로 편찬된 서적(書籍)으로써, 논술(論述)은 기초이론(基礎理論)을 위주로 하고, 또 일부 병설(病說)도 분석(分析)하였는데 그 내용이 간요(簡要)하며, 변석(辨析)이 매우 정미(精微)하게 되어있다. 그 중 1-23난(難)은 맥(脈)을 논(論)하고, 23-29난(難)은 경락(經絡)을 논(論)하고, 30-47난(難)은 장부(臟腑)를 논(論)하고, 48-61난(難)은 병(病)을 논(論)하고, 62-68난(難)은 혈도(穴道)를 논(論)하고, 69-81난(難)은 침법(鍼法)을 논(論)하였다. 특히 <난경(難經)>에는 진법(診法)으로써 오늘날까지 한의학의 맥진방법(脈診方法)으로써, 가장 많이 응용되고 있는 '독취촌구법(獨取寸口法)'을 명확하게 밝히고 있다. 이에 본(本) 저자(著者)는 <난경(難經)>의 맥론(脈論)에 대한 이해를 높이기 위하여 <난경지연구(難經之硏究)>를 중심으로 1-23난(難)에 나오는 맥론(脈論)들을 정리하여 다음과 같이 정리하였다. 팔십일(八十一) 난경중(難經中) 일난(一難)부터 삼십삼난(三十三難)까지의 맥학(脈學)에 관(關)한 조문중(條文中)에는, 백맥(百脈)이 조회(朝會)하고 그 시작(始作)과 끝이 되는 촌구(寸口)를 중심개념(中心槪念)으로 하고 정상적(正常的)인 생리적(生理的) 맥(脈)과 병적(病的)인 맥(脈)이 대비(對比)되면서 제시(提示)되어있다. 1. 십난(十難)에서 오사(五邪)와 강유(剛柔)의 이론(理論)과 각(各) 장부(臟腑)의 고유(固有)한 맥상(脈狀)이 등장(登場)하고 있다. 2. 십삼난(十三難)에서는 색(色)과 맥(脈), 형육(形肉)의 세가지 요소(要素)가 상응(相應) 또는 상승(相勝)하는가에 따라서 병(病)의 난(難) 역치(易治)를 결정(決定)한다고 하였다. 3. 십사난(十四難)에서는 맥(脈)을 손(損)(지맥(遲脈))과 지(至)(수맥(數脈))으로 구분하는데, 맥(脈)의 손(損)에 따른 이경(離經), 탈정(奪精), 사(死), 절명(絶命)의 구분(區分)과, 맥(脈)의 지(至)에 따른 이경(離經), 탈정(奪精), 사(死), 절명(絶命)을 구분(區分)을 설명(說明)하였다. 4. 십오난(十五難)에서는 현(弦), 구(鉤), 모(毛), 석맥(石脈)으로 사시(四時)에 따라서 맥(脈)이 다르다는 것을 말하였다. 이와같이 난경(難經)에서는 "독취촌구(獨取寸口)"의 맥법(脈法)을 명화(明確)하게 확립(確立)하였으며, <내경(內經)>의 이론(理論)을 더욱 다져서 진일보(進一步)시키면서도 <내경(內經)>과는 다른 독창적(獨創的) 이론(理論)을 제시(提示)한 것이 <난경(難經)>의 가치(價値)를 더하게 하였다.

• 대한의용생체공학회:의공학회지
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• 제37권4호
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• pp.134-139
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• 2016

US Food and Drug Administration (FDA) approved as a innovative cure for cancer, 1996. The effect is death of cancer cells through necrosis, apoptosis. Mainly the Continuous Wave mode (CW) use for PDT Laser. It sting, the question including itch, and etc. Reportedly, the increase of temperature with the perforated edema, ulcer, necrosis. The Thermal relaxation time and Oxygen recovery time is necessary. To give a normal oxygen recovery time of the cell, used Pulse mode. Progress, it was Burst Pulse mode when easing the thermal wake, the simplicity was secured, the PDT effect is good. Excepted in control group CW, Pulse, Burst pulse mode were incubated with various concentrations of 5-aminolevulinic acid hydrochloride (ALA-5). The tumor size reduction CW mode (44%), Pulse mode (48%), Burst pulse mode (53%) at 4 week after PDT with 0.3, 0.3, 0.3 mg/ml of ALA-5. After 4 hours, investigation of 100, 100, $100J/cm^2$ laser irradiation. The pulse mode was superior in expirimental data analysis. And it was the Burst pulse mode edge head of a family effect.

• 대한한의학원전학회지
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• 제30권3호
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• pp.77-93
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• 2017

Objectives : Clear and detailed analysis on Pulse-taking on both Carotid and Wrist Pulses is an absolute prerequisite if it is to be applied in real practice or its practical value proven. Methods : The original notes found in Suwen and Lingshu, their translations, and conventional studies regarding Suwen LiuJieCangXiangLun's Pulse-taking are compared and analyzed to find cases within medical texts where this method was used and to get an idea of the direction taken by the conventional study. Results : The ilsung, esung, samsung, and sasung of Carotid (or wrist pulses) refers that the pulse is one-, two-, three-, four-fold in differences. Refrainment should be practiced while comparing carotid and wrist pulses. Rather, they need to be compared with their normal states. Used by Luo Tianyi in Ming Dunasty, this method of pulse-taking was used for (radial artery) when diagnosing and treating the degree of seriousness of food injury. The measurement of maximum blood flow velocity using TCD done recently proved the validity of this pulse-taking, and it's been used for alleviating hypertension or tinnitus through acupuncture, or abating intractable diseases (around carotid). Conclusions : The obscurity of the measuring method of this pulse-taking can be resolved, and the problem which occurs while comparing carotid and wrist pulses can be solved. Even though there are differences in opinion regarding the positions when comparing the two pulses, their practical values are acknowledged since their usages in diagnosis, treatments, experiments, and researches have yielded positive results to a degree. They may not be used that often, but they are nonetheless under utilization.