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Journal articles on the topic 'Radial beat'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Ralston, Katherine S., Alana G. Lerner, Dennis R. Diener, and Kent L. Hill. "Flagellar Motility Contributes to Cytokinesis in Trypanosoma brucei and Is Modulated by an Evolutionarily Conserved Dynein Regulatory System." Eukaryotic Cell 5, no. 4 (2006): 696–711. http://dx.doi.org/10.1128/ec.5.4.696-711.2006.

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ABSTRACT The flagellum of Trypanosoma brucei is a multifunctional organelle with critical roles in motility and other aspects of the trypanosome life cycle. Trypanin is a flagellar protein required for directional cell motility, but its molecular function is unknown. Recently, a trypanin homologue in Chlamydomonas reinhardtii was reported to be part of a dynein regulatory complex (DRC) that transmits regulatory signals from central pair microtubules and radial spokes to axonemal dynein. DRC genes were identified as extragenic suppressors of central pair and/or radial spoke mutations. We used R

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Robergs, R. A., S. E. Griffin, D. James, D. Wagner, and R. Quintana. "BEAT-TO-BEAT RADIAL ARTERY BLOOD PRESSURE CHANGES DURING REST TO EXERCISE TRANSITIONS." Medicine & Science in Sports & Exercise 30, Supplement (1998): 114. http://dx.doi.org/10.1097/00005768-199805001-00646.

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3

Puig Bernabeu, J., C. López Forte, J. Belda Nácher, and J. Moreno Pachón. "Noninvasive continuous beat-to-beat radial artery pressure via TL-200 applanation tonometry." European Journal of Anaesthesiology 29 (June 2012): 45. http://dx.doi.org/10.1097/00003643-201206001-00145.

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4

Dueck, Ron, Oliver Goedje, and Paul Clopton. "Noninvasive continuous beat-to-beat radial artery pressure via TL-200 applanation tonometry." Journal of Clinical Monitoring and Computing 26, no. 2 (2012): 75–83. http://dx.doi.org/10.1007/s10877-012-9336-2.

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5

Yucha, Carolyn B., Mark C. K. Yang, Pei-Shan Tsai, and Kristine S. Calderon. "Comparison of Blood Pressure Measurement Consistency Using Tonometric and Automated Oscillometric Instruments." Journal of Nursing Measurement 11, no. 1 (2003): 73–88. http://dx.doi.org/10.1891/jnum.11.1.73.52066.

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To effectively evaluate treatments for hypertension, researchers and clinicians must be able to measure blood pressure (BP) in a valid and reliable way. The purpose of this study is to compare measurements made in the clinic using beat-to-beat radial BP tonometry, measurements made during 24 hours using an ambulatory BP monitor, and measurements made in the clinic using an automated oscillometric BP monitor. Fifty-seven adults with primary hypertension participated in this study, which used a repeated measures descriptive design. Clinic and ABPM daytime averages were compatible for both SBP an

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Dueck, Ron, Oliver Goedje, and Paul Clopton. "Erratum to: Noninvasive continuous beat-to-beat radial artery pressure via TL-200 applanation tonometry." Journal of Clinical Monitoring and Computing 26, no. 6 (2012): 495. http://dx.doi.org/10.1007/s10877-012-9393-6.

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7

KENFACK, Marcel AZABJI, Federic LADOR, Marc LICKER, et al. "Cardiac output by Modelflow® method from intra-arterial and fingertip pulse pressure profiles." Clinical Science 106, no. 4 (2004): 365–69. http://dx.doi.org/10.1042/cs20030303.

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Modelflow®, when applied to non-invasive fingertip pulse pressure recordings, is a poor predictor of cardiac output (Q, litre·min-1). The use of constants established from the aortic elastic characteristics, which differ from those of finger arteries, may introduce signal distortions, leading to errors in computing Q. We therefore hypothesized that peripheral recording of pulse pressure profiles undermines the measurement of Q with Modelflow®, so we compared Modelflow® beat-by-beat Q values obtained simultaneously non-invasively from the finger and invasively from the radial artery at rest and

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Wang, Ting-Wei, and Shien-Fong Lin. "Wearable Piezoelectric-Based System for Continuous Beat-to-Beat Blood Pressure Measurement." Sensors 20, no. 3 (2020): 851. http://dx.doi.org/10.3390/s20030851.

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Non-invasive continuous blood pressure measurement is an emerging issue that potentially can be applied to cardiovascular disease monitoring and prediction. Recently, many groups have proposed the pulse transition time (PTT) method to estimate blood pressure for long-term monitoring. However, the PTT-based methods for blood pressure estimation are limited by non-specific estimation models and require multiple calibrations. This study aims to develop a low-cost wearable piezoelectric-based system for continuous beat-to-beat blood pressure measurement. The pressure change in the radial artery wa

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Wu, Sheng, Kangfu Liu, Wenjing Wang, et al. "Aluminum Nitride Piezoelectric Micromachined Ultrasound Transducer Arrays for Non-Invasive Monitoring of Radial Artery Stiffness." Micromachines 14, no. 3 (2023): 539. http://dx.doi.org/10.3390/mi14030539.

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An aluminum nitride (AlN) piezoelectric micromachined ultrasound transducer (PMUT) array was proposed and fabricated for non-invasive radial artery stiffness monitoring, which could be employed in human vascular health monitoring applications. Using surface micromachining techniques, four hexagonal PMUT arrays were fabricated within a chip area of 3 × 3 mm2. The mechanical displacement sensitivity and quality factor of a single PMUT were tested and found to be 24.47 nm/V at 5.94 MHz and 278 (in air), respectively. Underwater pulse-echo tests for the array demonstrated a −3 dB bandwidth of 0.76

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10

Essingholt, Felix, Frederic Meyer, Peter Kuhn, Philip Schmidt, Thorsten Benkner, and Anton Grabmaier. "Non-Invasive Heart Beat Measurement Using Microwave Resonators." Proceedings 2, no. 13 (2018): 1002. http://dx.doi.org/10.3390/proceedings2131002.

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In this paper we present the first results of our research regarding microwave biosensors for non-invasive permittivity monitoring of the human body. To detect permittivity changes, resonators are used, which alter their resonance frequency and their quality factor depending on the permittivity of the material they are placed upon. These permittivity changes may be used as indicators for the heart rate, blood pressure or glucose level. As a proof of concept, this paper focusses on designing resonators to detect the heart beat of humans in the Radial Artery, which is located in the forearm.

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11

Palatini, P., L. Mos, P. Mormino, et al. "Blood pressure changes during running in humans: the "beat" phenomenon." Journal of Applied Physiology 67, no. 1 (1989): 52–59. http://dx.doi.org/10.1152/jappl.1989.67.1.52.

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In 20 runners the intra-arterial blood pressure changes determined by a long-distance run and by a maximal bicycle ergometric test were recorded by means of the portable Oxford system. A peculiar pattern of the phasic waves was observed throughout the run: continuous rhythmic pulse pressure oscillations ranging in frequency between 4 and 28/min and unrelated to respiration were detected. The shape of these oscillations prompted us to investigate whether they were due to a “beat” phenomenon, that is, to the combined effect of two waves with a nearly equal frequency. To test this hypothesis, dur

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Bikia, Vasiliki, Stamatia Pagoulatou, Theodore G. Papaioannou, and Nikolaos Stergiopulos. "4.5 CARDIAC OUTPUT ESTIMATION FROM BEAT-TO-BEAT RADIAL PRESSURE AND PULSE WAVE VELOCITY: A MODEL-BASED STUDY." Artery Research 24, no. C (2018): 76. http://dx.doi.org/10.1016/j.artres.2018.10.044.

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13

Szabados, L. "Interrelation of Modal Amplitudes of Double-Mode Pulsators." International Astronomical Union Colloquium 185 (2002): 418–19. http://dx.doi.org/10.1017/s0252921100016687.

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AbstractDuring the study of the factors governing the modal amplitudes of the double-mode radial pulsators, it has been found that the R21 Fourier parameter deduced from the light curves is in a relationship with the ratio of the modal amplitudes, for beat Cepheids and RR Lyrae variables, as well. The form of this relation gives a natural explanation for the fact that double-mode pulsators with slightly excited second modes do not exist.

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Ryazantsev, O. V., S. V. Мarchenko, and M. V. Kulik. "On the Doppler effect in radar." Radiotekhnika, no. 204 (April 9, 2021): 93–98. http://dx.doi.org/10.30837/rt.2021.1.204.10.

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The possibilities of simultaneous use of the longitudinal and transverse Doppler effects have been analyzed, and expressions have been derived for the corresponding beat frequencies between the emitted and received signals. As a rule, only the longitudinal Doppler effect is used in modern radio engineering systems, which makes it possible to determine the radial component of the object's speed. In addition, there are situations for which it is generally impossible to determine the speed of an object without taking into account the transverse Doppler effect. The authors analyze the

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15

Fedele, R., U. de Angelis, and T. Katsouleas. "Generation of radial fields in the beat-wave accelerator for Gaussian pump profiles." Physical Review A 33, no. 6 (1986): 4412–14. http://dx.doi.org/10.1103/physreva.33.4412.

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16

Korürek, Mehmet, and Berat Doğan. "ECG beat classification using particle swarm optimization and radial basis function neural network." Expert Systems with Applications 37, no. 12 (2010): 7563–69. http://dx.doi.org/10.1016/j.eswa.2010.04.087.

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17

Murray, John M., and Rob Ward. "Study of eukaryotic flagellar components by cryo-electron microscopy." Proceedings, annual meeting, Electron Microscopy Society of America 44 (August 1986): 98–101. http://dx.doi.org/10.1017/s0424820100142141.

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The eukaryotic flagellum is constructed from 11 parallel tubular elements arranged as 9 peripheral fibers (doublet microtubules) and 2 central fibers (singlet microtubules). The primary motion generating component has been found to be arranged as axially periodic “arms” bridging the adjacent doublets. The dynein, comprising the arms, has been isolated and characterized from several different cilia and flagella. Various radial and azimuthal cross-links stabilize the axially aligned microtubules, and probably play some role in controlling the form of the flagella beat cycle.

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18

Normand, Hervé, Erick Lemarchand, Philippe Arbeille, et al. "Beat-to-beat agreement of noninvasive tonometric and intra-radial arterial blood pressure during microgravity and hypergravity generated by parabolic flights." Blood Pressure Monitoring 12, no. 6 (2007): 357–62. http://dx.doi.org/10.1097/01.mbp.0000209088.78235.59.

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19

Lindqvist, A. "Beat-to-beat agreement of non-invasive finger artery and invasive radial artery blood pressure in hypertensive patients taking cardiovascular medication." Clinical Physiology 15, no. 3 (1995): 219–29. http://dx.doi.org/10.1111/j.1475-097x.1995.tb00513.x.

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20

Segura Montero, O., S. H. Ramírez, and J. Echevarría. "New observations of DW Cnc: where is the 38 min signal?" Monthly Notices of the Royal Astronomical Society 494, no. 3 (2020): 4110–18. http://dx.doi.org/10.1093/mnras/staa856.

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ABSTRACT We present extensive radial velocity observations of the intermediate polar DW Cnc during its 2018–2019 low state. We show that the 86 min signal associated with the orbital period is strong in our radial velocity analysis, power spectrum search, and in our Doppler tomography. However, we find that the velocity modulation associated with the 70 min beat period and the 38 min spin cycle is dramatically weaker than that previously observed. We put forward two interpretations for this change. The first is that a sudden drop into a low state detected in 2018–2019 caused an episode of low

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21

Miskovish, R. S., and C. E. Brennen. "Some Unsteady Fluid Forces on Pump Impellers." Journal of Fluids Engineering 114, no. 4 (1992): 632–37. http://dx.doi.org/10.1115/1.2910078.

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Spectral analyses of all the forces and moments acting on a typical centrifugal pump impeller/volute combination are presented. These exhibit shaft frequencies, blade passing frequencies, and beat frequencies associated with a whirl motion imposed on the shaft in order to measure rotordynamic forces. Among other features the unsteady thrust was found to contain a surprisingly large blade passing harmonic. While previous studies have explored the magnitudes of the steady fluid-induced radial forces and the fluid-induced rotordynamic forces for this typical centrifugal pump impeller/volute combi

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22

Tanaka, Shinobu, Masamichi Nogawa, Takehiro Yamakoshi, and Ken-ichi Yamakoshi. "Accuracy Assessment of a Noninvasive Device for Monitoring Beat-by-Beat Blood Pressure in the Radial Artery Using the Volume-Compensation Method." IEEE Transactions on Biomedical Engineering 54, no. 10 (2007): 1892–95. http://dx.doi.org/10.1109/tbme.2007.894833.

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23

Mhlahlo, Nceba, Stephen B. Potter, and David Buckley. "Spectroscopic and Photometric Observations of the Magnetic Cataclysmic Variable TX Col." International Astronomical Union Colloquium 190 (2004): 156–62. http://dx.doi.org/10.1017/s0252921100001998.

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AbstractSimultaneous photometry and spectroscopy of the Intermediate Polar TX Col were obtained in order to investigate its accretion mode and dynamics. The spectroscopic and photometric power spectra of TX Col are observed to change on relatively short timescales. Spectroscopy reveals a dominant periodicity at the orbital period (5.69 hr) and a spin period of 1909 s in radial velocities, while line equivalent widths show a strong periodicity at the beat period (2106 s). It is the first time that the orbital period has been detected in optical wavelengths.

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24

Pawelczyk, J. A., and P. B. Raven. "Reductions in central venous pressure improve carotid baroreflex responses in conscious men." American Journal of Physiology-Heart and Circulatory Physiology 257, no. 5 (1989): H1389—H1395. http://dx.doi.org/10.1152/ajpheart.1989.257.5.h1389.

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To test the hypothesis that unloading cardiopulmonary receptors improves human carotid baroreceptor responsiveness we measured heart rate (HR) and mean radial artery blood pressure (BP) responses elicited by trains of neck pressure and neck suction from +40 to -65 Torr during graded lower body negative pressure (LBNP) at -5, -10, -15, -20, -35, and -50 Torr in eight healthy men. Gain of the carotid baroreflexes was determined from logistic modeling of the HR [expressed as R-R interval (RRI)] and BP responses to neck pressure and neck suction. Central venous pressure (CVP) decreased progressive

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25

Bicka, Marta, Ewa Joachimiak, Paulina Urbanska, et al. "Cfap91-Dependent Stability of the RS2 and RS3 Base Proteins and Adjacent Inner Dynein Arms in Tetrahymena Cilia." Cells 11, no. 24 (2022): 4048. http://dx.doi.org/10.3390/cells11244048.

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Motile cilia and eukaryotic flagella are specific cell protrusions that are conserved from protists to humans. They are supported by a skeleton composed of uniquely organized microtubules—nine peripheral doublets and two central singlets (9 × 2 + 2). Microtubules also serve as docking sites for periodically distributed multiprotein ciliary complexes. Radial spokes, the T-shaped ciliary complexes, repeat along the outer doublets as triplets and transduce the regulatory signals from the cilium center to the outer doublet-docked dynein arms. Using the genetic, proteomic, and microscopic approache

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Payne, R. A., C. N. Symeonides, D. J. Webb, and S. R. J. Maxwell. "Pulse transit time measured from the ECG: an unreliable marker of beat-to-beat blood pressure." Journal of Applied Physiology 100, no. 1 (2006): 136–41. http://dx.doi.org/10.1152/japplphysiol.00657.2005.

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The arterial pulse-wave transit time can be measured between the ECG R-wave and the finger pulse ( rPTT), and has been shown previously to have a linear correlation with blood pressure (BP). We hypothesized that the relationship between rPTT, preejection period (PEP; the R-wave/mechanical cardiac delay), and BP would vary with different vasoactive drugs. Twelve healthy men (mean age 22 yr) were studied. Beat-to-beat measurements were made of rPTT (using ECG and photoplethysmograph finger probe), intra-arterial radial pressure, PEP (using cardiac bioimpedance), and transit time minus PEP ( pPTT

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27

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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28

Jiang, Xiaoyu, Longqing Yu, Jingyi Li, et al. "Effect of obesity on cardiovascular morphofunctional phenotype: Study of Mendelian randomization." Medicine 104, no. 13 (2025): e41858. https://doi.org/10.1097/md.0000000000041858.

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Background: Obesity is an independent factor for cardiovascular diseases, impacting health across different age groups. cardiovascular magnetic resonance (CMR) imaging is considered the gold standard for noninvasive assessment of cardiovascular structure and function. We conducted a Mendelian randomization (MR) study to explore the associations between obesity-related traits and the clinical pre-phenotype of cardiac and aortic structure and function. Methods: Independent genetic variations significantly correlated with adult body mass index, adult waist-to-hip ratio, birth weight, child body m

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Odell, Andrew P., and Robert D. Watson. "Did Beta Canis Majoris Quit Pulsating?" International Astronomical Union Colloquium 139 (1993): 183. http://dx.doi.org/10.1017/s0252921100117245.

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AbstractThe star β CMa, prototype of the β CMa variables, is known to have been a double mode pulsator since the beginning of the century, with amplitudes of 12 and 7 km/sec for the 6.00 and 6.03 hour oscillations (Shobbrook, 1973). Recently, Dziembowski, Moskalik, and Pamyatnykh (1992) have produced models of B stars using OPAL opacities which have many radial and non-radial modes unstable. As only a few modes are observed in these stars, these authors suggest that modes might change amplitude in such a way that modes can appear, disappear, or be replaced by other modes. Based on unsubstantia

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Nawaz, Fouzia, Muhammad Safdar Luqman, and Afsha Jabeen. "THE EFFECTS OF MODERATE INTENSITY AEROBIC EXERCISES UPON HEART RECOVERY OF COLLEGE GIRLS." DECEMBER 01, no. 02 (2020): 166–76. http://dx.doi.org/10.53664/jsrd/01-02-2020-05-166-176.

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The existing stud was aimed to observe effects of moderate intensity aerobic exercises upon heart recovery of college girls. The study was experimental by using longitudinal data collection approach i.e., pre-test and post-test. Total participants in study were 40. The selected population was randomly being divided into two groups, “experimental and control group”. The experimental group gained special treatment for a period of 8 weeks. The heart beat was checked through Radial artery which is easily felt on thumb side of the wrist of arm. For radial artery, three fingers of hand used. After t

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31

Connes, Pierre. "Absolute Astronomical Accelerometry: A New Tool for Planetary Searching." Symposium - International Astronomical Union 112 (1985): 91–95. http://dx.doi.org/10.1017/s007418090014639x.

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Absolute astronomical accelerometry is a new proposed technique specifically optimized to detect small radial velocity changes (i.e. accelerations) of either the Sun or a star; it is intended for the two problems of stellar seismology and the search for extrasolar planetary systems. In both cases the computed performance is such that positive results should be obtainable in a large number of cases with a moderate size telescope. Essentially the method involves two separate and simultaneous servo loops. In the first a variable path-difference Fabry-Perot interferometer is adjusted so that its b

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32

Melnikov, Leonid, Irina Veshneva, and Andrej Konjuhov. "The numerical simulation of transverse pattern dynamics in a laser." Izvestiya VUZ. Applied Nonlinear Dynamics 3, no. 6 (1995): 73–89. https://doi.org/10.18500/0869-6632-1995-3-6-73-89.

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The results of numerical modelling of transverse pattern dynamics in a unidirectional ring laser with fast-relaxed active medium of arbitrary optical thickness are presented. The geometry of a cavity containing spherical mirrors and apertures is included in the numerical model. The results presented for the symmetric cavity. Modes with radial index up to 10 and azimuth ones up to 9 are included in the field decomposition. The stationary regimes with deformed modes, the regimes of quasiperiodic oscillations, and locking regimes were observed, in the last ones transverse-mode beat frequency is i

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33

Sugawara, Jun, Tsubasa Tomoto, Tomoko Imai, Seiji Maeda, and Shigehiko Ogoh. "Impact of mild orthostatic stress on aortic-cerebral hemodynamic transmission: insight from the frequency domain." American Journal of Physiology-Heart and Circulatory Physiology 312, no. 5 (2017): H1076—H1084. http://dx.doi.org/10.1152/ajpheart.00802.2016.

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High cerebral pressure and flow fluctuations could be a risk for future cerebrovascular disease. This study aims to determine whether acute systemic vasoconstriction affects the dynamic pulsatile hemodynamic transmission from the aorta to the brain. We applied a stepwise lower body negative pressure (LBNP) (−10, −20, and −30 mmHg) in 15 young men to induce systemic vasoconstriction. To elucidate the dynamic relationship between the changes in aortic pressure (AoP; estimated from the radial arterial pressure waveforms) and the cerebral blood flow velocity (CBFV) at the middle cerebral artery (v

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Morozov, Nikita F., Alexey V. Lukin, and Ivan A. Popov. "Gyroscopically coupled in-plane and transverse vibrations of an annular free-clamped microplate." Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy 11, no. 2 (2024): 354–70. http://dx.doi.org/10.21638/spbu01.2024.209.

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In this work, we construct and study a model of coupled plane-transverse oscillations of a circular thin plate with a concentric hole under the action of Coriolis and centrifugal inertia forces caused by the rotation of the system along an axis located in the plane of the plate. Equations of vibrations in partial derivatives are obtained using the variational principle of Hamilton - Ostrogradsky. Assuming the smallness of the angular velocity of rotation with respect to the frequency of the working skew-symmetric flexural form of the plate oscillations, an approximate analytical solution is fo

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SATOH, Ryota, Toru MASUZAWA, Masahiro OSA, Kouhei OHNO, Takashi NISHIMURA, and Shunei KYO. "Evaluation of radial stability of maglev blood pump for extracorporeal circulation driven to synchronize with heart beat." Journal of the Japan Society of Applied Electromagnetics and Mechanics 26, no. 2 (2018): 362–67. http://dx.doi.org/10.14243/jsaem.26.362.

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Shin, Seung Koo, and Seung-Jin Han. "Application of sustained off-resonance irradiation: The beat frequency measurement and radial separation of mass-selected ions." Journal of the American Society for Mass Spectrometry 8, no. 1 (1997): 86–89. http://dx.doi.org/10.1016/s1044-0305(96)00195-x.

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37

Harkat, Amel, and Redha Benzid. "Premature Ventricular Contraction (PVC) Recognition Using DCT-CWT Based Discriminant and Optimized RBF Neural Network." Journal of Biomimetics, Biomaterials and Biomedical Engineering 60 (May 31, 2023): 109–17. http://dx.doi.org/10.4028/p-6yc34j.

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A new method for premature ventricular contraction (PVC) detection and classification is presented. The proposed algorithm is constituted of two principal phases: the features extraction and reduction phase and the optimized classification phase. In the first phase, the discrete cosine transform (DCT) and the continuous wavelet transform (CWT) are applied on each ECG beat to generate an augmented features vector. For the optimized classification phase, the radial basis function (RBF) neural network classifier is trained and optimized by the bat algorithm. For the aim of performances evaluation

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Mitchell, David R., and Winfield S. Sale. "Characterization of a Chlamydomonas Insertional Mutant that Disrupts Flagellar Central Pair Microtubule-associated Structures." Journal of Cell Biology 144, no. 2 (1999): 293–304. http://dx.doi.org/10.1083/jcb.144.2.293.

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Two alleles at a new locus, central pair–associated complex 1 (CPC1), were selected in a screen for Chlamydomonas flagellar motility mutations. These mutations disrupt structures associated with central pair microtubules and reduce flagellar beat frequency, but do not prevent changes in flagellar activity associated with either photophobic responses or phototactic accumulation of live cells. Comparison of cpc1 and pf6 axonemes shows that cpc1 affects a row of projections along C1 microtubules distinct from those missing in pf6, and a row of thin fibers that form an arc between the two central

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Williams, R. L., C. E. Clayton, C. Joshi, T. Katsouleas, and W. B. Mori. "Studies of relativistic wave–particle interactions in plasma-based collective accelerators." Laser and Particle Beams 8, no. 3 (1990): 427–49. http://dx.doi.org/10.1017/s0263034600008673.

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The interaction of externally injected charged particles (electrons) with plasma waves moving with a phase velocity that is very close to the speed of light is examined. Such plasma waves form the basis of at least three collective accelerator schemes: the plasma beat wave accelerator (PBWA), the plasma wake-field accelerator (PWFA), and the laser wake-field accelerator (LWFA). First, the electron trapping threshold, energy gain and acceleration length are examined using a 1-D model. This model elucidates how the final energies of the injected test electrons depend upon their injection and ext

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40

Hendrickson, Triscia W., Catherine A. Perrone, Paul Griffin, et al. "IC138 Is a WD-Repeat Dynein Intermediate Chain Required for Light Chain Assembly and Regulation of Flagellar Bending." Molecular Biology of the Cell 15, no. 12 (2004): 5431–42. http://dx.doi.org/10.1091/mbc.e04-08-0694.

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Increased phosphorylation of dynein IC IC138 correlates with decreases in flagellar microtubule sliding and phototaxis defects. To test the hypothesis that regulation of IC138 phosphorylation controls flagellar bending, we cloned the IC138 gene. IC138 encodes a novel protein with a calculated mass of 111 kDa and is predicted to form seven WD-repeats at the C terminus. IC138 maps near the BOP5 locus, and bop5-1 contains a point mutation resulting in a truncated IC138 lacking the C terminus, including the seventh WD-repeat. bop5-1 cells display wild-type flagellar beat frequency but swim slower

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Athaide, Chloe E., Bart Spronck, and Jason S. Au. "Physiological basis for longitudinal motion of the arterial wall." American Journal of Physiology-Heart and Circulatory Physiology 322, no. 5 (2022): H689—H701. http://dx.doi.org/10.1152/ajpheart.00567.2021.

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As opposed to arterial distension in the radial plane, longitudinal wall motion (LWM) is a multiphasic and bidirectional displacement of the arterial wall in the anterograde (i.e., in the direction of blood flow) and retrograde (i.e., opposing direction of blood flow) directions. Although initially disregarded as imaging artifact, LWM has been consistently reported in ultrasound investigations in the past decade and is reproducible beat-to-beat, albeit with large interindividual variability across healthy and diseased populations. Emerging literature has sought to examine the mechanistic contr

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Cardinal, René, Pierre Savard, J. Andrew Armour, Réginald Nadeau, D. Leigh Carson, and A. Robert LeBlanc. "Mapping of ventricular tachycardia induced by thoracic neural stimulation in dogs." Canadian Journal of Physiology and Pharmacology 64, no. 4 (1986): 411–18. http://dx.doi.org/10.1139/y86-066.

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To investigate ventricular tachycardias produced in healthy canine myocardium by stimulation of sympathetic ganglia or cardiac nerves, we simultaneously recorded a surface ECG and 63 ventricular electrograms in anesthetized open-chest dogs. Isochronal and isopotential maps were generated off-line by computer. Ventricular tachycardia with uniform beat-to-beat morphology was induced in 13 or 22 dogs by electrical stimulation of the left stellate ganglion (five experiments), the left middle cervical ganglion (four experiments), the left caudal pole cardiopulmonary nerve (two experiments), or the

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J, Rexy, Velmani P, and Rajakumar T.C. "Feature Extraction and Classification of Segmented ECG Signals Based on Radial Basis Function and Random Forest Methodology." International Journal on Cybernetics & Informatics 10, no. 2 (2021): 35–45. http://dx.doi.org/10.5121/ijci.2021.100205.

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Heart disease is the major cause of death ratio increase in this decade. Nowadays various people of different age sector undergo the high risk of heart problems and miss their precious life all of a sudden. Early detection of heart disease will save many people’s life well in advance. Heart Diseases are predictable and they can be identified in earlier stage. First basic method to identify heart disease is ElectroCardioGram (ECG) which is the basic recording method of electrical activities of a functioning heart. ECG is the cheapest and painless method to detect the basic heart problems. This

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Bazan, Rafał, Adam Schröfel, Ewa Joachimiak, Martyna Poprzeczko, Gaia Pigino, and Dorota Wloga. "Ccdc113/Ccdc96 complex, a novel regulator of ciliary beating that connects radial spoke 3 to dynein g and the nexin link." PLOS Genetics 17, no. 3 (2021): e1009388. http://dx.doi.org/10.1371/journal.pgen.1009388.

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Ciliary beating requires the coordinated activity of numerous axonemal complexes. The protein composition and role of radial spokes (RS), nexin links (N-DRC) and dyneins (ODAs and IDAs) is well established. However, how information is transmitted from the central apparatus to the RS and across other ciliary structures remains unclear. Here, we identify a complex comprising the evolutionarily conserved proteins Ccdc96 and Ccdc113, positioned parallel to N-DRC and forming a connection between RS3, dynein g, and N-DRC. Although Ccdc96 and Ccdc113 can be transported to cilia independently, their s

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Hilz, M. J., B. Stemper, P. Sauer, U. Haertl, W. Singer, and F. B. Axelrod. "Cold face test demonstrates parasympathetic cardiac dysfunction in familial dysautonomia." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 276, no. 6 (1999): R1833—R1839. http://dx.doi.org/10.1152/ajpregu.1999.276.6.r1833.

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In familial dysautonomia (FD), i.e., Riley-Day syndrome, parasympathetic dysfunction has not been sufficiently evaluated. The cold face test is a noninvasive method of activating trigeminal brain stem cardiovagal and sympathetic pathways and can be performed in patients with limited cooperation. We performed cold face tests in 11 FD patients and 15 controls. For 60 s, cold compresses (0–1°C) were applied to the cheeks and forehead while we monitored heart rate, respiration, beat-to-beat radial artery blood pressure, and laser-Doppler skin blood flow at the first toe pulp. From these measuremen

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Barclay, Skyler A., Lanna N. Klausing, Tessa M. Hill, Allison L. Kinney, Timothy Reissman, and Megan E. Reissman. "Characterization of Upper Extremity Kinematics Using Virtual Reality Movement Tasks and Wearable IMU Technology." Sensors 24, no. 1 (2023): 233. http://dx.doi.org/10.3390/s24010233.

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Task-specific training has been shown to be an effective neuromotor rehabilitation intervention, however, this repetitive approach is not always very engaging. Virtual reality (VR) systems are becoming increasingly popular in therapy due to their ability to encourage movement through customizable and immersive environments. Additionally, VR can allow for a standardization of tasks that is often lacking in upper extremity research. Here, 16 healthy participants performed upper extremity movement tasks synced to music, using a commercially available VR game known as Beat Saber. VR tasks were cus

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Liu, Bin, Yun’an Zhang, Xinfeng Wang, Yanjiao Li, and Yingjuan Yue. "Vibrational Characteristics of Au-Doped Si Nanowires: A Molecular Dynamics Study with a Modified Embedded Atom Method Potential Developed for Si-H-Au Systems." Journal of Nanomaterials 2022 (September 30, 2022): 1–15. http://dx.doi.org/10.1155/2022/5790074.

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Silicon nanowires (SiNWs) are promising structures as resonators for applications in ultrasensitive force and mass transducers. In the present work, large-scale molecular dynamics simulations were conducted to explore the effect of gold (Au), a commonly used catalyst, on the vibrational properties of [1 0 0] and [1 1 0] SiNWs. The force field was established using the modified embedded atom method (MEAM) formalism. The parameterization focused on the properties of the hydrogen-covered SiNWs doped with Au, involving the formation energy as well as the structural and vibrational characteristics.

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DARJANI, MORTEZA, ALI ESTEKI, and S. AHMAD HASSANTASH. "IN VITRO INVESTIGATION OF DYNAMIC VISCOELASTIC PROPERTIES OF HUMAN SAPHENOUS VEINS USING A CARDIOVASCULAR SIMULATOR." Journal of Mechanics in Medicine and Biology 16, no. 04 (2016): 1650044. http://dx.doi.org/10.1142/s0219519416500445.

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Coronary bypass surgery is a usual therapy for vessel-related diseases as several thousand of this kind of surgery are reported annually. In this surgery, saphenous vein, internal mammary artery or radial artery are grafted to replace coronary vessels. This research aims to evaluate viscoelastic properties of human saphenous vein vessel wall used in bypass surgery using a device designed in our laboratory. The most important feature of this device is its ability to simulate physiological conditions which exist inside humans’ bodies. During experiments, variations in both vessel diameter and ex

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Lam, Christopher, Megan Bedell, Lily L. Zhao, Arvind F. Gupta, and Sarah A. Ballard. "Gaspery: Optimized Scheduling of Radial Velocity Follow-up Observations for Active Host Stars." Astronomical Journal 168, no. 5 (2024): 200. http://dx.doi.org/10.3847/1538-3881/ad739b.

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Abstract Radial velocity (RV) follow-up is a critical complement of transiting exoplanet surveys like the Transiting Exoplanet Survey Satellite, both for validating discoveries of exoplanets and measuring their masses. Stellar activity introduces challenges to interpreting these measurements because the noise from the host star, which is often correlated in time, can result in high RV uncertainty. A robust understanding of stellar activity and how its timescales interact with the observing cadence can optimize limited RV resources. For this reason, in the era of oversubscribed, high-precision

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Ismael, Mustafa Adham. "Role of Multi-Detector CT Angiography in Assesmente of Athrosclerotic Coronary Artery Disease." AL-Kindy College Medical Journal 15, no. 2 (2020): 40–44. http://dx.doi.org/10.47723/kcmj.v15i2.159.

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Background: Imaging has a critical role in the diagnosis and evaluation of cardiac diseases, beginning with chest radiography and fluoro-scopy and progressing to coronary angio-graphy, echocardiography, nuclear medicine and recently multidetector computed tomo-graphy (MDCT) as well as magnetic resonance (MR) imaging Objective: To highlight the role of Multi-detector CT in the evaluation of coronary artery disease and its importance of being noninvasive diagnostic technique. Methods: A cross sectional study for 20 patients. Patients were asked to fast 6 hours prior to the examinatio

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