نتایج جستجو برای: variability of velocity

تعداد نتایج: 21187681  

Journal: :Journal of neurophysiology 2003
Jeroen B J Smeets Ignace T C Hooge

We studied the variability in saccades by comparing the peak velocities of saccades with the same target amplitude made with different actual amplitudes. We tested three hypotheses: the pulse-height noise hypothesis (peak velocity and amplitude vary proportionally), the localization noise hypothesis (variability in amplitude and peak velocity lie along the main sequence), and the independent no...

2003
John A. Barth

[1] Equatorward velocities in the upwelling jet of the northern California Current were 0.05–0.06 m s 1 faster in spring and summer 2002 than on average over 1998–2002. This result is based on a five-year data set of surface drifters released across the continental margin off central Oregon (44.65 N) during April and July of each year. At this speed, anomalous water displacements of over a degr...

2012
Cheng Ly Jason W. Middleton Brent Doiron

The responses of cortical neurons are highly variable across repeated presentations of a stimulus. Understanding this variability is critical for theories of both sensory and motor processing, since response variance affects the accuracy of neural codes. Despite this influence, the cellular and circuit mechanisms that shape the trial-to-trial variability of population responses remain poorly un...

Journal: :Astronomy and Astrophysics 2022

Hot subdwarf stars represent a late and peculiar stage in the evolution of low-mass stars, because they are likely formed by close binary interactions. Here we performed radial velocity (RV) variability study sample 646 hot subdwarfs with multi-epoch velocities from Sloan Digital Sky Survey (SDSS) Large Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) spectra [...] As diagnostics used f...

Journal: :فیزیک زمین و فضا 0
جعفر ولی پژوهشگاه صنعت نفت، مربی عزت اله کاظم زاده پژوهشگاه صنعت نفت، استادیار حسام آلوکی بختیاری پژوهشگاه صنعت نفت، مربی محمد رضا اصفهانی پژوهشگاه صنعت نفت، مربی

the goal of this laboratory study is to investigate the effect of pore shapes on seismic wave velocities in carbonate rocks under reservoir conditions. in this research, 41 core plugs of carbonate rocks from oil fields of the southwest of iran were prepared. the compressional and shear wave velocities were measured in both dry and brine saturated samples under several pressures especially reser...

Journal: :Ethnicity & disease 2014
Jenna B Jones Ibrahim F Shatat Brent M Egan Remberto C Paulo

OBJECTIVE To explore the relationship between 24-hour blood pressure (BP) variability, heart rate (HR) variability, and transcranial Doppler velocity (TCDV) in a cohort of pediatric sickle cell disease (SCD) patients. DESIGN, SETTING, AND PARTICIPANTS This is a retrospective study of 11 children aged 8-18 years with SCD who previously underwent 24-hour ambulatory BP monitoring and TCDV measur...

Journal: :Hypertension 2014
Fang-Fei Wei Yan Li Lu Zhang Ting-Yan Xu Feng-Hua Ding Ji-Guang Wang Jan A Staessen

Whether target organ damage is associated with blood pressure (BP) variability independent of level remains debated. We assessed these associations from 10-minute beat-to-beat, 24-hour ambulatory, and 7-day home BP recordings in 256 untreated subjects referred to a hypertension clinic. BP variability indices were variability independent of the mean, maximum-minimum difference, and average real ...

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