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Journal articles on the topic 'Shock Pulse measurement (SPM)'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Tawfik, Walid. "Precise measurement of ultrafast laser pulses using spectral phase interferometry for direct electric-field reconstruction." Journal of Nonlinear Optical Physics & Materials 24, no. 04 (2015): 1550040. http://dx.doi.org/10.1142/s021886351550040x.

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In this work, I present a novel method for measuring the pulse duration of few-cycle pulses using spectral phase interferometry for direct electric-field reconstruction (SPIDER) with high accuracy. These few-cycle pulses were generated due to nonlinear self-phase modulation (SPM) in nonlinear medium (neon gas) using a one meter hollow-fiber. The observed reconstructed pulse intensity autocorrelation function was varied from 5.35[Formula: see text]fs to almost 13[Formula: see text]fs. Moreover, the applied method allows for direct controlling of the output pulse duration through variation of th

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2

Futaba, Masaru, and Minoru Kamei. "SPM Shock Pulse Method for Diagnostic System of Rotating Roll Bearing." JAPAN TAPPI JOURNAL 57, no. 4 (2003): 518–23. http://dx.doi.org/10.2524/jtappij.57.518.

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3

Abidin, Zainal, Andi Isra Mahyuddin, and Wawan Kurniawan. "ROLLING BEARING DAMAGE DETECTION AT LOW SPEED USING VIBRATION AND SHOCK PULSE MEASUREMENTS." ASEAN Engineering Journal 4, no. 2 (2014): 6–21. http://dx.doi.org/10.11113/aej.v4.15417.

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This paper describes a study on damage detection of a rolling bearing at low speed. In this study, an NTN N204 cylindrical roller bearing with an artificial local damage was tested under various operating speed and load levels. During the testing, two methods of measurement are employed to detect the damage. The first method is vibration measurement while the second is shock pulse measurement. For vibration data, RMS (Root Mean Square) and CF (Crest Factor) values are utilized to evaluate the bearing condition. For shock pulse data, dBc (dB carpet), dBm (dB maximum), LR (Low Rate), HR (High Ra

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Väli, Berit, Tõnu Laas, Jana Paju, et al. "The experimental and theoretical investigations of damage development and distribution in double-forged tungsten under plasma irradiation-initiated extreme heat loads." Nukleonika 61, no. 2 (2016): 169–77. http://dx.doi.org/10.1515/nuka-2016-0029.

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Abstract The influence of extreme heat loads, as produced by a multiple pulses of non-homogeneous fl ow of slow plasma (0.1-1 keV) and fast ions (100 keV), on double-forged tungsten (DFW) was investigated. For generation of deuterium plasma and fast deuterons, plasma-focus devices PF-12 and PF-1000 are used. Depending on devices and conditions, the power flux density of plasma varied in a range of 107-1010 W/cm2 with pulse duration of 50-100 ns. Power flux density of fast ions was 1010-1012 W/cm2 at the pulse duration of 10-50 ns. To achieve the combined effect of different kind of plasmas, th

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Dhiman, Abhijeet, Nolan S. Lewis, Ayotomi Olokun, and Vikas Tomar. "Local Shock Properties Measurement Using Time-Resolved Raman Spectroscopy." EPJ Web of Conferences 250 (2021): 01023. http://dx.doi.org/10.1051/epjconf/202125001023.

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In this article, the dynamic response of a heterogeneous microstructure of polymer bonded composite was analyzed to a short duration shock pulse. The composite microstructure studied is a polymerbonded sugar (PBS) with single-crystal sucrose embedded inside the polydimethylsiloxane binder. The shock pulse was created by the impact of the aluminum disk at high speeds using a laser-based projectile launch system. The mechanical response on the microscale domain was measured using ultrafast time-resolved Raman spectroscopy. The in-situ analysis of the change in Raman spectra from PBS during shock

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Yoshida, Masayuki, Itsuki Nishibata, Tomoki Matsuda, et al. "Influence of pulse duration on mechanical properties and dislocation density of dry laser peened aluminum alloy using ultrashort pulsed laser-driven shock wave." Journal of Applied Physics 132, no. 7 (2022): 075101. http://dx.doi.org/10.1063/5.0083511.

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This study aims to investigate the influence of the pulse duration on the mechanical properties and dislocation density of an aluminum alloy treated using dry laser peening (DLP), which is a laser peening technique that uses ultrashort pulsed laser-driven shock wave to eliminate the need for a sacrificial overlay under atmospheric conditions. The results of the micro-Vickers hardness test, residual stress measurement, and dislocation density measurement demonstrate that over a pulse duration range of 180 fs to 10 ps, the maximum peening effects are achieved with a pulse duration of 1 ps. Moreo

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Schedler, Olaf, and Renate Boye. "Signal Extraction Technology in Aviation Medicine: Perfusion-Independent Determination of Peripheral Oxygen Saturation." Berlin Medical Journal 1, no. 1 (2019): 1–5. https://doi.org/10.36210/bermedj/epub102016.

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During air rescue, the technical limitations of conventional pulse oximetry for cases of centralised circulation and shock are amplified due to additional vibration and hypobaric conditions. The current study of 50 patients evaluated different methods of peripheral oxygen saturation (SpO2) measurement at an average altitude of 2200 feet. Signal extraction technology (SET) measured markedly higher SpO2values compared to conventional methods(97% vs. 76%). The SET measurements also took considerably less time (30 vs. 90 seconds), regardless of perfusion status. In 20% of the patients, conventiona

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Reinhardt, Nina, Theresa Dick, Laura Lang, Klaus Radermacher, and Matías de la Fuente. "Hybrid test bench for high repetition rate radial shock wave measurement." Current Directions in Biomedical Engineering 7, no. 2 (2021): 395–98. http://dx.doi.org/10.1515/cdbme-2021-2100.

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Abstract Radial shock wave therapy is used for different therapeutic indications. In order to assess the effect on the treated tissue, it is important to know the sound field parameters. However, it is challenging to measure the pressure curves of ballistic devices, especially at high pulse repetition rates. In the new standard IEC 63045:2020 two possibilities for sound field measurements of non-focusing devices are described, a wet and a dry test bench. The whole sound field can be characterised using a wet test bench, but the process is cumbersome and cavitation is likely to occur at high pu

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Lin, Jiahe, Yi Cai, and Shixiang Xu. "The Temporal Measurement of Infrared Femtosecond Fiber Laser Pulse with Complex Spectra: SPIDER and FROG." Journal of Physics: Conference Series 2557, no. 1 (2023): 012078. http://dx.doi.org/10.1088/1742-6596/2557/1/012078.

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Abstract Femtosecond fiber laser pulse (FFLP) is very suitable for precision laser processing (PLP) with the advantages of high power, compact integrated structure, and easy installation. However, with the power increasing, nonlinear optical effects (NOE) of fiber, such as self-phase modulation (SPM), will be greatly enhanced, and the spectra of the output pulse will be very complex, which considerably increases the temporal complexity of FFLP and takes an immeasurable influence on PLP, so it is of great significance to accurately measure the temporal property of FFLP for higher accuracy of PL

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10

Kotobuki, N., T. Shirato, D. Ciptaningtyas, et al. "A proposal of the optimal sampling interval for shock pulse measurement." Acta Horticulturae, no. 1396 (June 2024): 315–20. http://dx.doi.org/10.17660/actahortic.2024.1396.43.

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Otsuka, Masahiko, Naoki Okamoto, and Shigeru Itoh. "A Study on Shock Energy for Concrete Destruction Using Underwater Shock Wave." Materials Science Forum 566 (November 2007): 225–30. http://dx.doi.org/10.4028/www.scientific.net/msf.566.225.

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In this study, the destruction of concrete block using underwater shock wave generated by high current is studied. A metal wire was connected to an electrode and a high voltage impulsive current was passed through it to generate the underwater shock wave. The underwater shock wave was investigated by optical observation using a high-speed camera and pressure measurement. A comparison was made on the shock wave generated from the electrode with and without connecting it to a metal wire. The underwater shock wave generated from electrode without metal wire showed the existence of many shock wave

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Gonzalez-Romero, Ricardo, Marija Strojnik, Guillermo Garcia-Torales, and Gilberto Gomez-Rosas. "Frequency Dependence of a Piezo-Resistive Method for Pressure Measurements of Laser-Induced Shock Waves in Solids." Photonics 8, no. 4 (2021): 120. http://dx.doi.org/10.3390/photonics8040120.

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A shock wave is a mechanical high-pressure pulse that travels inside a medium with a full width at half-maximum of a few nanoseconds that may be induced with a high-power laser pulse. A piezo-resistive measurement method to determine the shock wave pressure has been widely employed even though there is inner inaccuracy in the calibration process. We are interested in developing a precise theoretical model of laser material processing for applications in material sciences that includes the frequency dependence of the electronic post processing. We show an approach to determine the correction fa

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Boccaccini, D. N., M. Romagnoli, E. Kamseu, Paolo Veronesi, C. Leonelli, and G. C. Pellacani. "Determination of thermal shock resistance in refractory materials by ultrasonic pulse velocity measurement." Journal of the European Ceramic Society 27, no. 2-3 (2007): 1859–63. http://dx.doi.org/10.1016/j.jeurceramsoc.2006.05.070.

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Bi, Ran, Jianxiong Yang, Chengqi Huang, Xiaoyu Zhang, Ran Liao, and Hui Ma. "Pulse Feature-Enhanced Classification of Microalgae and Cyanobacteria Using Polarized Light Scattering and Fluorescence Signals." Biosensors 14, no. 4 (2024): 160. http://dx.doi.org/10.3390/bios14040160.

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Harmful algal blooms (HABs) pose a global threat to the biodiversity and stability of local aquatic ecosystems. Rapid and accurate classification of microalgae and cyanobacteria in water is increasingly desired for monitoring complex water environments. In this paper, we propose a pulse feature-enhanced classification (PFEC) method as a potential solution. Equipped with a rapid measurement prototype that simultaneously detects polarized light scattering and fluorescence signals of individual particles, PFEC allows for the extraction of 38 pulse features to improve the classification accuracy o

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15

Zhong, Dong, Zhong Ming Li, Ruo Lin Ruan, and Chen Chun. "A Novel Acoustic Diagnostic Method on Femtosecond Laser Plasma Shock Wave." Materials Science Forum 861 (July 2016): 287–92. http://dx.doi.org/10.4028/www.scientific.net/msf.861.287.

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In the paper, the optical fiber F-P acoustic emission sensing probe has been proposed to monitor online space-time progress of femtosecond laser plasma shock wave for the first time, the structure of sensing probe is microstructure with full optical fiber probes without glue, it can measure weak acoustic emission high frequency signal on femtosecond laser plasma shock wave. In the process of femtosecond laser ablating copper, iron and aluminum, we research and analyze the plasma shock wave acoustic emission signal change regulation under different laser pulse energy and different distance betw

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16

Guo, Xueliang, and Deren Kong. "Simulation analysis of thermal shock response of piezoelectric shock wave pressure sensor." Vibroengineering Procedia 51 (October 20, 2023): 134–40. http://dx.doi.org/10.21595/vp.2023.23592.

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Under the influence of transient high temperatures, piezoelectric shock wave pressure sensors produce a thermal shock response that affects the accurate acquisition of the pressure signal. In order to analyse the effect of thermal shock on the measurement of piezoelectric pressure sensors, a rectangular pulse temperature of 1800 ℃ with a duration of 30 ms was applied to the surface of the sensor diaphragm by the method of thermal coupling, and the temperature distribution inside the sensor under transient thermal excitation was explored, and the thermal expansion displacement and preload chang

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Guan, Zheng Rong, Jun Ping Li, and Xin Wu Wang. "Research on Condition Monitoring and Fault Diagnosis of Metallurgical Machinery and Equipment." Applied Mechanics and Materials 52-54 (March 2011): 504–10. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.504.

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Using the signal amplitude domain, frequency domain, bearing shock pulse measurement of bearings, gear boxes, motors and other rotating machinery vibration parameters for key components, through the accumulation of historical data and diagnosis, to predict in advance of equipment failure, for maintenance work to help provide a reliable and assurance purposes. The results show that the system does for the routine maintenance of production equipment has played a guiding role.

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18

Xie, Wei, Zhenbing Luo, Yan Zhou, Lin Wang, Wenqiang Peng, and Tianxiang Gao. "Experimental Study on Ramp Shock Wave Control in Ma3 Supersonic Flow Using Two-Electrode SparkJet Actuator." Processes 8, no. 12 (2020): 1679. http://dx.doi.org/10.3390/pr8121679.

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The control of a shock wave produced by a ramp (ramp shock) in Ma3 supersonic flow using a two-electrode SparkJet (SPJ) actuator in a single-pulse mode is studied experimentally. Except for schlieren images of the interaction process of SPJ with the flow field, a dynamic pressure measurement method is also used in the analysis of shock wave control. In a typical experimental case, under the control of single-pulsed SPJ, the characteristic of ramp shock changes from “short-term local upstream motion” in the initial stage to “long-term whole downstream motion” in the later stage. The angle and p

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SAKAI, Ryo, Ryosuke TERAJIMA, and Masaaki TAMAGAWA. "Pressure Measurement of Ultra-Short Pulse Laser-induced Underwater Focused Shock Wave at Focal Point." Proceedings of Conference of Kyushu Branch 2019.72 (2019): E33. http://dx.doi.org/10.1299/jsmekyushu.2019.72.e33.

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20

Lieberman, Paul, John Czajkowski, and John Rchard. "Optical System for Measurement of Pyrotechnic Test Accelerations." Journal of the IEST 35, no. 6 (1992): 25–39. http://dx.doi.org/10.17764/jiet.2.35.6.jt5tv5811217p704.

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This effort was directed at comparing the response of several different accelerometcr and amplifier combinations to the pyrotechnic pulse simulating the ordnance separation of stages of multistage missiles. These pyrotechnic events can contain peak accelerations in excess of 100,000 G and a frequency content exceeding 100,000 Hz. The main thrust of this work was to compare the several accelerometer systems with each other and with a very accurate laser Doppler displacement meter in order to establish the frequency bands and acceleration amplitudes where the accelerometer systems are in error.

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21

SHUKLA, M., A. UPADHYAY, V. K. SENECHA, et al. "Equation-of-state studies using a 10-Hz Nd:YAG laser oscillator." Laser and Particle Beams 21, no. 4 (2003): 615–26. http://dx.doi.org/10.1017/s026303460321421x.

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A commercial mode locked cavity dumped Nd:YAG dye laser operating at 10 Hz repetition rate is modified to produce a high contrast (>5000:1) single laser pulse while maintaining the energy stability and high beam quality. A trigger generator biases the cavity dumping photodiode, which is triggered externally by a pulse from the microprocessor-based control unit controlling a ∼2 J/200 ps laser chain. In the laser chain, the high contrast (>5000:1) is achieved by an external pulse selector based on single Pockel's cell to select a single laser pulse of high contrast, which is a prerequisite

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Luthfie, Fadjar, Triyono Triyono, and Soeharsono Soeharsono. "DETEKSI CACAT BANTALAN GELINDING DENGAN ANALISIS SPEKTRUM VIBRASI: STUDI KASUS DI PERUSAHAAN PETROKIMIA." Jurnal Teknik Mesin 13, no. 1 (2024): 57. https://doi.org/10.22441/jtm.v13i1.25319.

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Bantalan gelinding adalah komponen terpenting permesinan berputar dan harus mampu mempertahankan unjuk kerjanya dalam kondisi yang baik. Dan bantalan gelinding harus mampu menahan beban saat beroperasi dengan minim gesekan. Ketika bantalan gelinding mengalami kerusakan atau gagal fungsi, hal ini akan mengganggu unjuk kerjanya. Kerusakan bisa terjadi pada elemen bantalan gelinding, lintasan dalam atau lintasan luar dan sangkar elemen yang mengikatnya. Paper ini adalah studi kasus yang terjadi pada extruder di perusahaan petrokimia, di mana bantalan gelinding seri SKF-22334C yang dipasang mengal

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Tausendfreund, Andreas, Dirk Stöbener, and Andreas Fischer. "Induction of Highly Dynamic Shock Waves in Machining Processes with Multiple Loads and Short Tool Impacts." Applied Sciences 9, no. 11 (2019): 2293. http://dx.doi.org/10.3390/app9112293.

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In order to study the mechanical loads of a workpiece in manufacturing processes such as single-tooth milling, in-process measurements of workpiece deformations are required. To enable the resolution of shock waves due to the mechanical impact of the tool, a novel measurement system based on speckle photography is introduced to measure the dynamic deformations and strains with a high temporal and spatial resolution. The measurement results indicate deformations and strains propagating through the workpiece with the speed of sound triggered by the tool impact (i.e., the tool impact is shown to

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Hulewicz, Arkadiusz, Krzysztof Dziarski, and Łukasz Drużyński. "Indirect Thermographic Measurement of the Temperature of a Transistor Die during Pulse Operation." Sensors 24, no. 19 (2024): 6452. http://dx.doi.org/10.3390/s24196452.

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This paper presents aspects related to the indirect thermographic measurement of a C2M0280120D transistor in pulse mode. The tested transistor was made on the basis of silicon carbide and is commonly used in many applications. During the research, the pulse frequency was varied from 1 kHz to 800 kHz. The transistor case temperature was measured using a Flir E50 thermographic camera and a Pt1000 sensor. The transistor die temperature was determined based on the voltage drop on the body diode and the known characteristics between the voltage drop on the diode and the temperature of the die. The

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Cuenca, Eduardo, Mathieu Ducousso, Nicolas Cuvillier, Laurent Berthe, and François Coulouvrat. "Propagation of laser weak shock waves in a three-dimensional woven composite composite." Journal of the Acoustical Society of America 157, no. 4 (2025): 2942–55. https://doi.org/10.1121/10.0036496.

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The propagation of a laser-driven shock wave in an aeronautic composite material is investigated. The material, made of three-dimensional carbon fiber lattices embedded in an epoxy matrix, is heterogeneous and anisotropic, due to the intrinsic anisotropy of the carbon fibers and to the weaving process. The shock is generated by a 10 ns laser pulse, focused on the material surface. Its ablation results in an expanding plasma, which induces a shock wave in the material with a peak compression stress of a few GPa. Starting from an optical microscopy visualization of the weaving, a differentiation

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Garcia-Romeu-Martinez, M. A., Michael A. Sek, Vincent Rouillard, and V. A. Cloquell-Ballester. "Interpreting Shock Data to Estimate Drop Height Levels During Handling." Applied Mechanics and Materials 7-8 (August 2007): 243–50. http://dx.doi.org/10.4028/www.scientific.net/amm.7-8.243.

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During distribution, consignments undergo numerous handling processes both mechanized and manual. These operations are known to produce drops and impacts of varying severity which have a potential to cause damage to the product. These shocks are the main parameters required for the optimum design of protective packaging systems. The severity of the shocks is often described in terms of their effective (free-fall equivalent) drop height (EDH) and impact orientation, in order to facilitate the laboratory testing conducted on a free-fall apparatus. The preferred approach is to survey the shocks w

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Sun, Qiao, and Hong-bo Hu. "Implementations and pilot comparison of primary low intensity shock calibration." ACTA IMEKO 5, no. 3 (2016): 70. http://dx.doi.org/10.21014/acta_imeko.v5i3.314.

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<p class="Abstract">This paper first presents two main technical concerns for a possible low intensity shock comparison: variety of primary shock calibration systems and feasibility of comparison artifact. For the primary calibration system, the mechanical excitation includes hammer-anvil collision, pneumatic driven projectile impact and Hopkinson bar. The shock pulses generated are smooth monopole shape by the first two types with air bearings, but dipole shape by the third type. For the comparison artifact, a standard accelerometer of single-ended type with a charge amplifier consists

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Trdan, Uros, Janez Grum, and Michael R. Hill. "Generation of Residual Stresses and Improvement of Surface Integrity Characteristics by Laser Shock Processing." Materials Science Forum 681 (March 2011): 480–85. http://dx.doi.org/10.4028/www.scientific.net/msf.681.480.

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The influence of different parameters of laser shock processing applied to a precipitation-hardened aluminium alloy 6082-T651, on residual stress, surface tophraphy and microhardness was investigated. Processing was performed with an innovative Nd:YLF laser with the power densities of 2 and 4 GW/cm2, with a uniform pulse duration of 18 ns. Laser shock processing experiments were performed with the closed ablation method to ensure a higher shock-wave pressure. In the first phase, the study was focused on an evaluation of surface topography, with the record of the surface roughness profile and w

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Grum, Janez, Uros Trdan, and Michael R. Hill. "Laser Shock Processing of ENAW 6082 Aluminium Alloy Surface." Materials Science Forum 589 (June 2008): 379–84. http://dx.doi.org/10.4028/www.scientific.net/msf.589.379.

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The present paper treats results of laser shock processing applied to a precipitationhardened ENAW 6082-T651 aluminium alloy. Processing was performed with a Nd:YLF-yttrium lithium fluoride crystal laser with power densities of 2 and 4 GW/cm2, producing a pulse of 18 ns. Laser shock processing experiments were performed with the closed ablation method, the application of an ablative coating and a transparent tamping medium to obtain a higher shock-wave pressure. In the first phase, the surface study focused on the record of surface profile with a roughness gauge and on an evaluation of surface

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Bellmann, Joerg, Joern Lueg-Althoff, Sebastian Schulze, Soeren Gies, Eckhard Beyer, and A. Erman Tekkaya. "Parameter Identification for Magnetic Pulse Welding Applications." Key Engineering Materials 767 (April 2018): 431–38. http://dx.doi.org/10.4028/www.scientific.net/kem.767.431.

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Magnetic pulse welding (MPW) is a promising technology to join dissimilar metals and to produce multi-material structures, e.g. to fulfill lightweight requirements. During this impact welding process, proper collision conditions between both joining partners are essential for a sound weld formation. Controlling these conditions is difficult due to a huge number of influencing and interacting factors. Many of them are related to the pulse welding setup and the material properties of the moving part, the so-called flyer. In this paper, a new measurement system is applied that takes advantage of

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Lian, Hui, Xiaoting Wang, Qing Zhang, Hongmin Zhang, and Dawei Liu. "Changes in perfusion can detect changes in the cardiac index in patients with septic shock." Journal of International Medical Research 48, no. 8 (2020): 030006052093167. http://dx.doi.org/10.1177/0300060520931675.

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Objective The perfusion index (PI) is usually used to assess peripheral perfusion, which can be influenced by the cardiac index (CI). CI monitoring is often needed during the treatment of patients with shock. We investigated the relationship between changes in the PI (ΔPI) and changes in the CI (ΔCI) in patients with septic shock. Methods This retrospective study included patients with septic shock who underwent pulse-induced continuous cardiac output monitoring. We measured the CI and PI before and after fluid loading during the first 6 hours of intensive care unit admission. Fluid responsive

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Leone, Marc, Sami Blidi, François Antonini, et al. "Oxygen Tissue Saturation Is Lower in Nonsurvivors than in Survivors after Early Resuscitation of Septic Shock." Anesthesiology 111, no. 2 (2009): 366–71. http://dx.doi.org/10.1097/aln.0b013e3181aae72d.

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Background Growing evidence suggests that the microvascular dysfunction is the key element of the pathogenesis of septic shock. This study's purpose was to explore whether the outcome of septic shock patients after early resuscitation using early goal-directed therapy is related to their muscle tissue oxygenation. Methods Tissue oxygen saturation (Sto2) was monitored in septic shock patients using a tissue spectrometer (InSpectra Model 325; Hutchinson Technology, Hutchinson, MN). For the purpose of this retrospective study, the Sto2 values were collected at the first measurement done after the

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Mitelea, Ion, Daniel Mutașcu, Ion-Dragoș Uțu, Corneliu Marius Crăciunescu, and Ilare Bordeașu. "Cavitation Erosion of the Austenitic Manganese Layers Deposited by Pulsed Current Electric Arc Welding on Duplex Stainless Steel Substrates." Crystals 14, no. 4 (2024): 315. http://dx.doi.org/10.3390/cryst14040315.

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Fe-Mn-Cr-Ni alloys like Citomangan, delivered in the form of powders, tubular wires, and coated electrodes, are intended for welding deposition operations to create wear-resistant layers. Their main characteristic is their high capacity for surface mechanical work-hardening under high shock loads, along with high toughness and wear resistance. In order to increase the resistance to cavitation erosion, hardfacing of Duplex stainless steel X2CrNiMoN22-5-3 with Citomangan alloy was performed using a new welding technique, namely one that uses a universal TIG source adapted for manual welding with

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Dubova, O. A., A. A. Dubovyi, and D. V. Feshchenko. "Indirect evaluation method and parameters of blood pressure and its indexes in dogs." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 20, no. 88 (2018): 80–84. http://dx.doi.org/10.32718/nvlvet8814.

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The article presents the results of studies on the adaptation of the automatic tonometer Longevita BP–1305 with replaceable marking cuffs I(C1I) and C(C1C) for the oscillometric method of blood pressure measuring in dogs of different sizes. Reference indicators are defined. The proposed method is indirect and is based on the measurement of air pressure required to compress the artery and stop the blood flow in it. The initial recorded tone displays the maximum, or systolic, pressure (Sys). The process of stopping the registration of pulse tremors occurs at the time of restoration of the artery

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Dubova, O.A., A.A. Dubovyi, and D.V. Feshchenko. "Indirect evaluation method and parameters of blood pressure and its indexes in dogs." Scientific Messenger of Lviv National University of Veterinary Medicine and Biotechnologies 20, no. 88 (2018): 80–84. https://doi.org/10.32718/nvlvet8814.

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The article presents the results of studies on the adaptation of the automatic tonometer Longevita BP–1305 with replaceable marking cuffs I(C1I) and C(C1C) for the oscillometric method of blood pressure measuring in dogs of different sizes. Reference indicators are defined. The proposed method is indirect and based on the measurement of air pressure required to compress the artery and stop the blood flow in it. The initial recorded tone displays the maximum, or systolic, pressure (Sys). The process of stopping the registration of pulse tremors occurs at the time of restoration of the artery lu

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Ehler, Andrew, Abhijeet Dhiman, Tyler Dillard, et al. "High-Strain Rate Spall Strength Measurement for CoCrFeMnNi High-Entropy Alloy." Metals 12, no. 9 (2022): 1482. http://dx.doi.org/10.3390/met12091482.

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In this study, we experimentally investigate the high stain rate and spall behavior of Cantor high-entropy alloy (HEA), CoCrFeMnNi. First, the Hugoniot equations of state (EOS) for the samples are determined using laser-driven CoCrFeMnNi flyers launched into known Lithium Fluoride (LiF) windows. Photon Doppler Velocimetry (PDV) recordings of the velocity profiles find the EOS coefficients using an impedance mismatch technique. Following this set of measurements, laser-driven aluminum flyer plates are accelerated to velocities of 0.5–1.0 km/s using a high-energy pulse laser. Upon impact with Co

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Smailov, Nurzhigit, Sauletbek Koshkinbayev, Yerlan Tashtay, et al. "Numerical Simulation and Measurement of Deformation Wave Parameters by Sensors of Various Types." Sensors 23, no. 22 (2023): 9215. http://dx.doi.org/10.3390/s23229215.

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The results of applications of various methods for measuring the parameters of high-speed loading using a strain gauge, a fiber Bragg grating located on a metal measuring rod and an interferometer monitoring the movement of the free boundary of the end of the rod are presented. Numerical simulation confirmed the adequacy of the description of the shock-wave process according to experimental data and showed that, with the thickness of the adhesive layer fixing the fiber Bragg grating and the strain gauge on a dimensional rod up to 100 µm, the deformation parameters of the sensors correspond to

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Ganter, Michael T., Jamal A. Alhashemi, Adel M. Al-Shabasy, et al. "Continuous cardiac output measurement by un-calibrated pulse wave analysis and pulmonary artery catheter in patients with septic shock." Journal of Clinical Monitoring and Computing 30, no. 1 (2015): 13–22. http://dx.doi.org/10.1007/s10877-015-9672-0.

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Scolletta, Sabino, Igor D. Gregoric, Luigi Muzzi, Branislav Radovancevic, and O. Howard Frazier. "Pulse wave analysis to assess systemic blood flow during mechanical biventricular support." Perfusion 22, no. 1 (2007): 63–66. http://dx.doi.org/10.1177/0267659106074784.

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Measurement of systemic blood flow is of crucial importance in patients on mechanical circulatory support (MCS). We reported the case of a 65-year-old female patient in severe cardiogenic shock undergoing left (Jarvik 2000 axial flow pump) and right (Levitronix-Centrimag centrifugal pump) ventricular assist device implant. Evaluation of blood flow was obtained by ultrasonic flowmetry, continuous thermodilution technique, and pressure recording analytical method (PRAM). This pulse contour system allows beat-by-beat systemic blood flow assessment from the analysis of radial artery pressure wavef

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Lee, Keon-Hyeong, Min-Su Kim, Jeong-Yeol Choi, and Kenneth H. Yu. "An Experimental Investigation of Low-Frequency Active Excitation in Scramjet Combustor Using a Micro-Pulse Detonation Engine." Aerospace 11, no. 7 (2024): 559. http://dx.doi.org/10.3390/aerospace11070559.

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A micro-pulse detonation engine (μPDE) was designed and installed to a direct-connect scramjet combustor of Pusan National University (PNU-DCSC). The active excitation on the scramjet combustor was experimentally studied using the μPDE operating at frequencies of 10–20 Hz. A vitiation air heater (VAH) was used to supply high-enthalpy vitiated air to the isolator and the scramjet combustor at a Mach number of 2.0, with a total temperature of 1600 K and a total pressure of 1.68 MPa. The exit of μPDE was located at the center of the cavity of the scramjet combustor. Active excitation was performe

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van Houwelingen, Marc J., Daphne Merkus, Jan Hofland, et al. "A novel approach to assess hemorrhagic shock severity using the arterially determined left ventricular isovolumic contraction period." American Journal of Physiology-Heart and Circulatory Physiology 305, no. 12 (2013): H1790—H1797. http://dx.doi.org/10.1152/ajpheart.00504.2013.

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Recently, the ventilatory variation in pre-ejection period (ΔPEP) was found to be useful in the prediction of fluid-responsiveness of patients in shock. In the present study we investigated the behavior of the ventilation-induced variations in the systolic timing intervals in response to a graded hemorrhage protocol. The timing intervals studied included the ventilatory variation in ventricular electromechanical delay (ΔEMD), isovolumic contraction period (determined from the arterial pressure waveform, ΔAIC), pulse travel time (ΔPTT), and ΔPEP. ΔAIC and ΔPEP were evaluated in the aorta and ca

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Grum, Janez, Martin Zupančič, and J. L. Ocaña. "Laser Shock Processing of the Maraging Steel Surface." Materials Science Forum 537-538 (February 2007): 655–62. http://dx.doi.org/10.4028/www.scientific.net/msf.537-538.655.

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Laser Shock Processing (LSP) is a process of laser treating of a surface with a pulsed beam of high power density. The process enables hardening of a thin surface layer; therefore, it is suitable for the improvement of fatigue strength of quality materials. Locally directed mechanical waves produce a considerably increased dislocation density in the thin surface layer, which affects the variations of microhardness and residual stresses. The magnitude and variation of the residual compressive stresses in the surface layer are favourable, which ensures higher fatigue strength. Laser shock proces

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SCHUCHERT, ANDREAS, JOACHIM WINTER, LUDWIG BINNER, MARTIN KUHL, and THOMAS MEINERTZ. "Intraoperative Comparison of a Subthreshold Test Pulse with the Standard High-Energy Shock Approach for the Measurement of Defibrillation Lead Impedance." Journal of Cardiovascular Electrophysiology 17, no. 1 (2006): 56–59. http://dx.doi.org/10.1111/j.1540-8167.2005.00261.x.

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Hatib, Feras, Jos R. C. Jansen, and Michael R. Pinsky. "Peripheral vascular decoupling in porcine endotoxic shock." Journal of Applied Physiology 111, no. 3 (2011): 853–60. http://dx.doi.org/10.1152/japplphysiol.00066.2011.

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Cardiac output measurement from arterial pressure waveforms presumes a defined relationship between the arterial pulse pressure (PP), vascular compliance (C), and resistance (R). Cardiac output estimates degrade if these assumptions are incorrect. We hypothesized that sepsis would differentially alter central and peripheral vasomotor tone, decoupling the usual pressure wave propagation from central to peripheral sites. We assessed arterial input impedance (Z), C, and R from central and peripheral arterial pressures, and aortic blood flow in an anesthetized porcine model ( n = 19) of fluid resu

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Singh, Prakash, Sharad Trivedi, Viren Menezes, and Hamid Hosseini. "Dynamic Calibration and Validation of an Accelerometer Force Balance for Hypersonic Lifting Models." Scientific World Journal 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/813759.

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An accelerometer-based force balance was designed and developed for the measurement of drag, lift, and rolling moment on a blunt-nosed, flapped delta wing in a short-duration hypersonic shock tunnel. Calibration and validation of the balance were carried out by a convolution technique using hammer pulse test and surface pressure measurements. In the hammer pulse test, a known impulse was applied to the model in the appropriate direction using an impulse hammer, and the corresponding output of the balance (acceleration) was recorded. Fast Fourier Transform (FFT) was operated on the output of th

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Kuzmin, Oleg. "Super-hard coatings deposited under conditions of the dynamic shock wave and measurement features of control parameters during production." Journal of the Mechanical Behavior of Materials 29, no. 1 (2020): 169–76. http://dx.doi.org/10.1515/jmbm-2020-0017.

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Abstract Super-hard coatings are of increasing scientific interest as they allow synthesizing materials with unique physical and chemical properties for further application in the industry at high-speed processing or tooling. This study is aimed to investigate tetrahedral amorphous carbon (ta-C) films, as well as the dependence of the pulsation parameters on the irradiation parameters and the potential of such pulsations to be further applied in practice. The article shows that ta-C films are completely amorphous and have up to 85% of sp3 bonds. Deposited films are characterized by high compre

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Hillen, Michaël, Seppe Sels, Bart Ribbens, et al. "Qualitative Comparison of Lock-in Thermography (LIT) and Pulse Phase Thermography (PPT) in Mid-Wave and Long-Wave Infrared for the Inspection of Paintings." Applied Sciences 13, no. 7 (2023): 4094. http://dx.doi.org/10.3390/app13074094.

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When studying paintings with active infrared thermography (IRT), minimizing the temperature fluctuations and thermal shock during a measurement becomes important. Under these conditions, it might be beneficial to use lock-in thermography instead of the conventionally used pulse thermography (PT). This study compared the observations made with lock-in thermography (LIT) and pulse phase thermography (PPT) with halogen light excitation. Three distinctly different paintings were examined. The LIT measurements caused smaller temperature fluctuations and, overall, the phase images appeared to have a

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Fujinawa, Y., Y. Noda, K. Takahashi, M. Kobayashi, K. Takamatsu, and J. Natsumeda. "Field Detection of Microcracks to Define the Nucleation Stage of Earthquake Occurrence." International Journal of Geophysics 2013 (2013): 1–18. http://dx.doi.org/10.1155/2013/651823.

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Main shocks of natural earthquakes are known to be accompanied by preshocks which evolve following the modified Ohmori’s law in average over many samples. Individual preshock activity, however, is far less systematic for predictive purposes. On the other hand, the microcracks in laboratory rock experiments are always preceded to final rupture. And, previous investigations of field acoustic emissions showed that the activity increases prominently before and after the main shock. But there is no detection of any phenomena to identify the nucleation stage. Here we show that a special underground

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Lin, Sunny Jui-Shan, Yung-Yen Cheng, Chih-Hung Chang, Cheng-Hung Lee, Yi-Chia Huang, and Yi-Chang Su. "Traditional Chinese Medicine Diagnosis “Yang-Xu Zheng”: Significant Prognostic Predictor for Patients with Severe Sepsis and Septic Shock." Evidence-Based Complementary and Alternative Medicine 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/759748.

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Pathogenesis of sepsis includes complex interaction between pathogen activities and host response, manifesting highly variable signs and symptoms, possibly delaying diagnosis and timely life-saving interventions. This study applies traditional Chinese medicine (TCM)Zhengdiagnosis in patients with severe sepsis and septic shock to evaluate its adaptability and use as an early predictor of sepsis mortality. Three-year prospective observational study enrolled 126 septic patients. TCMZhengdiagnosis, Acute Physiology and Chronic Health Evaluation (APACHE) II score, and blood samples for host respon

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Shtreker, D. S., A. N. Popov, D. V. Reshetov, and G. A. Utkin. "The measurement of deformation of elastic shapers of various stiffness and assessment of the influence of shaper deformation on the parameters of the shock pulse." Journal of Physics: Conference Series 1753, no. 1 (2021): 012001. http://dx.doi.org/10.1088/1742-6596/1753/1/012001.

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