• Title/Summary/Keyword: pulse analysis

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Analysing of pulse wave parameter and typical pulse pattern for diagnosis in floating and sinking pulses (${\cdot}$ 침맥 진단에 유용한 맥상 파라메터 및 대표맥상 분석)

  • Lee, Yu-Jung;Lee, Jeon;Choi, Eun-Ji;Lee, Hae-Jung;Kim, Jong-Yeol
    • Korean Journal of Oriental Medicine
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    • v.12 no.2 s.17
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    • pp.93-101
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    • 2006
  • Pulse feeling is one of the most important diagnosis method in Oriental medicine. But it is not easy to make an objective and standardized diagnosis. In this study, we found how to quantify diagnosis. Specially dally the high practicality in clinic, we search some parameters especially well-related to floating and sinking pulse by statistic analysis. By extension, we find the pulse patterns of the floating and sinking pulse. We choose 15 subjects diagnosed as floating pulse and 15 subjects diagnosed as sinking pulse by oriental doctors. And their pulse signals were acquired by Pulse analyzer which has piezoresistive pressure sensor. For the quantification of the floating and sinking pulse, at first, we examined the parameters which were highly correlated with oriental doctor's diagnosis. And then we derived pulse patterns of the floating-sinking pulse from preprocessed signal and its ensemble average. We also looked trend variation (PH-Curve) between contact and pulse pressure. As a result, statistically there is the biggest difference between contact pressure, the maximum pulse pressure, diastolic area (Ad) and floating and sinking data. Through the PH-Curve, which represented the relationship between contact and pulse pressure, we could divide the floating and sinking pulse clearly. As a basic research of pulse diagnosis algorithm, we can contribute to select essential parameters in diagnosis algorithm And using these diagnosis method, we expect to find typical pulse patterns and some useful parameters about other pulses like slow/rapid, large/fine pulse and so on. We hope that this study will contribute pulse objectification.

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Transient Response Analysis of Trapezoidal Corrugated Plates with Stiffeners (보강된 사다리꼴 주름판의 과도 응답 해석)

  • Park, Kyung-Jo;Kim, Young-Wann
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.24 no.10
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    • pp.788-794
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    • 2014
  • In this paper, the transient response analysis of the trapezoidal corrugated plate subjected to the pulse load is investigated by the theoretical method. Three types of pulse loads are considered: stepped, isosceles triangular and right triangular pulse loads. The corrugated plates can be represented as an orthotropic plate. Both the effective extensional and flexural stiffness of this equivalent orthotropic plate are considered in the analysis. The plate is stiffened by concentric stiffeners perpendicular to the corrugation direction. The stiffening effect is represented by the discrete stiffener theory. This theoretical results are validated by those obtained from 3D finite element analysis based on shell elements. Some numerical results are presented to check the effect of the geometric properties.

Determinants of the Brachial-ankle Pulse Wave Velocity in Patients with Metabolic Syndrome and Ischemic Stroke (대사증후군을 동반한 허혈성 뇌혈관 질환 환자의 맥파속도에 관한 연구)

  • Kim, Dong-Woung;Park, Bo-Ra
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.25 no.3
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    • pp.551-557
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    • 2011
  • The purpose of this study is to investigate the relation between brachial-ankle pulse wave velocity and the features of metabolic syndrome, and differences according to sex in patients diagnosed cerebral infarction. The study group comprised 61 patients over age 30 who were diagnosed cerebral infarction, accompanied with metabolic syndrome. The brachial-ankle pulse wave velocity, blood pressure, lipid profiles, fasting blood glucose, body mass index were measured. Also we checked past history of patients. Then we analyzed the association between brachial-ankle pulse wave velocity and the features of metabolic syndrome. Pearson correlation analysis reflected the variables affecting the brachial-ankle pulse wave velocity as follows : Age, SBP(systolic blood pressure), DBP(diastolic blood pressure), FBS(fasting blood glucose) were positively correlated. As a result of regression analysis, in patients with cerebral infarction accompanied with metabolic syndrome, the brachial-ankle pulse wave velocity is affected by age to men, SBP, FBS, DBP to women. The brachial-ankle pulse wave velocity is not affected by the components of metabolic syndrome, except blood pressure, FBS, in patients with ischemic stroke.

Effect of Laser Acupuncture on Arterial Pulse

  • Cho, Jaekyong;Kang, Dong Hwan
    • Journal of Biomedical Engineering Research
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    • v.36 no.5
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    • pp.191-197
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    • 2015
  • Laser acupuncture is defined as the stimulation of traditional acupuncture points with low-intensity, nonthermal laser irradiation. Possible advantages in using laser acupuncture are the noninvasive, painless and low risks of infection treatment. The purpose of this study is to assess the effect of laser acupuncture on the quality and waveform of arterial pulses. Ten acupuncture points were stimulated repeatedly three times in 30 individuals by laser with emission in the near infrared spectral region (808 nm) using an out power and power density of 45 mW and $143W/cm^2$. The analysis of pulse quality and waveform was performed based on the measurement of arterial pressure of the left and right wrist, using a 3-dimensional blood pressure pulse analyzer. Excess-like pulse quality of subjects before laser acupuncture changed significantly to balanced pulse quality after 10, 20, and 30 minutes of laser acupuncture; coefficient of deficient or excess, $C_{DE}$, decreased significantly from 0.68 before acupuncture to 0.61, 0.55, and 0.55 after 10, 20, 30 minutes of laser acupuncture ($$p{\leq_-}0.006$$), respectively. Other pulse qualities, floating or sinking, slow or rapid, choppy or slippery did not change significantly by laser acupuncture (p > 0.05). Pulse waveform analysis showed that amplitude of main peak (systolic function or aortic compliance, $h_1$) of left and right artery pulse waves decreased significantly after 10, 20, and 30 minutes of laser acupuncture (p < 0.05). Other parameters, duration of one cardiac cycle (T), duration of rapid systolic ejection ($T_1$), duration of the systolic phase ($T_4$), and duration of the diastolic phase ($T_5$) of left and right artery pulses did not change significantly after laser acupuncture (p > 0.05).

Pulse Multiplication of 6-Pulse Thyristor Converter with Simple Auxiliary Circuit (간단한 보조회로 추가에 의한 6-펄스 싸이리스터 컨버터의 다펄스화)

  • 정재혁;최세완;이인환;황용하
    • The Transactions of the Korean Institute of Power Electronics
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    • v.5 no.6
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    • pp.568-574
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    • 2000
  • A new pulse multiplication technique based on 6-pulse thyristor converters is proposed in this paper. With the proposed technique, 12-pulse, 18-pulse and 24-pulse operations have been obtained both on the input current and on the output voltage. A control strategy over the whole range of phase angle is provided along with sophisticated input current and output voltage analysis. Experimental results from a laboratory prototype verify the proposed theory.

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A study on The Characteristic of Traditional Pediatric Pulse Diagnosis (소아맥진(小兒脈診)의 특성(特性)에 대한 소고(小考))

  • Baik, You-Sang
    • Journal of Korean Medical classics
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    • v.27 no.1
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    • pp.111-122
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    • 2014
  • Objective : The region, observation period, figuration of pulse, pulse frequency, process of diagnosis and related diagnostic methods in traditional pediatric pulse diagnosis were studied in this article. Method : The articles related to traditional pediatric pulse diagnosis in Traditional medical classics, and analysis to the characteristics of it was done, then lastly, the principle of pulse manifestation and the meaning of application to modern times were considered. Result & Conclusion : It is difficult to catch the figuration of pediatric pulse because of dynamic change of body conditions, fast heartbeat and narrow region of pulse. Therefore, the pulse diagnosis appropriated for children have been developed and combined with the special diagnosis methods, for example, palpation of forehead and observation of index finger. The traditional pediatric pulse diagnosis is done with just one finger palpation in the period of 3 to 5 years old to identify the speed, length, size and height of pulse. The standard average of pulse frequency is 7~8 par breath in the period of 3 to 5 years old according to traditional medical classic.

Wave shape analysis of seismic records at borehole of TTRH02 and IWTH25 (KiK-net)

  • Kamagata, Shuichi
    • Earthquakes and Structures
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    • v.18 no.3
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    • pp.297-312
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    • 2020
  • The KiK-net by NIED is a vertical array measurement system. In the database of KiK-net, singular pulse waves were observed in the seismic record at the borehole of TTRH02 during the mainshock (the magnitude of Japan Meteorological Agency (MJ) 7.3, MW 6.8) and aftershock (Mj 4.2) of Tottori-ken Seibu earthquake in 2000. Singular pulse waves were also detected in the seismic records at the borehole of IWTH25 during the Iwate-Miyagi Nairiku earthquake in 2008 (MJ 7.2, MW 6.9). These pulse waves are investigated by using the wave shape analysis methods, e.g., the non-stationary Fourier spectra and the double integrated displacement profiles. Two types of vibration modes are discriminated as the occurrence mechanism of the singular pulse waves. One corresponds to the reversal points in the displacement profile with the amplitude from 10-4 m to 10-1 m, which is mainly related to the fault activity and the amplification pass including the mechanical amplification (collision) of the seismograph in the casing pipe. The other is the cyclic pulse waves in the interval of reversal points, which is estimated as the backlash of the seismograph itself with the amplitude from 10-5 m to 10-4 m.

Numerical Simulation of Borehole Expansion By Pulse Discharge (펄스 방전에 의한 시추공 확공 현상에 대한 수치해석)

  • Park, Hyun-Ku;Lee, Seung-Rae;Kim, Tae-Hoon
    • Proceedings of the Korean Geotechical Society Conference
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    • 2009.09a
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    • pp.1346-1353
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    • 2009
  • In this study, a numerical study was carried out to simulate the expansion of ground borehole by pulse discharge technology using finite element analysis. Considering the mortar in the borehole as an acoustic medium and the surrounding soil as an elasto-plastic material, the strong shock wave developed by the pulse discharge was modeled using the underwater explosion model. The ground expansion was simulated based on a coupled acoustic-structural analysis with varying properties of mortar and soil, and the behavior between acoustic-structural interface.

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A study on the insulation detection for electrical machnes by corona pulse technique (Corona pulse 검출에 의한 전력기기절연진단에 대한-고찰)

  • 성영권;정성계;김왕곤
    • 전기의세계
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    • v.16 no.5
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    • pp.15-18
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    • 1967
  • This paper shows the analysis for mechanisms of corona pulse caused by dielectric breakdown, and for the results of observed values on an actual machines with the this corona pulse technique. Although the above results are not directly related with the generation, numbers or wave of the corona pulse, it may possibly be chanced a judgement of dielectric breakdown and one of better synthetic judgement methods for actual electrical machines.

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A Study on the Electrochemical Micromachining with Various Pulse Currents (전원특성에 따른 마이크로 전해가공에 관한 연구)

  • 박정우;이은상;문영훈
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.942-945
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    • 2001
  • Pulse electrochemical micromachining offers significant improvements in dimensional accuracy as compared with conventional electrochemical machining. One primary issue in pulse electrochemical micromachining is to identify and control machining depth as well as interelectrode gap size. This paper presents an identification method for the machining depth by in-process analysis of machining current and interelectrode gap size. The inter electrode gap characteristics, including pulse current, effective volumetric electrochemical equivalent and electrolyte conductivity variations, are analysed based on the model and experiments.

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