Results 21 to 30 of about 271,382 (280)

On isometric and minimal isometric embeddings [PDF]

open access: yesDuke Mathematical Journal, 1997
In this paper we study critial isometric and minimal isometric embeddings of classes of Riemannian metrics which we call {\it quasi-$k$-curved metrics}. Quasi-$k$-curved metrics generalize the metrics of space forms. We construct explicit examples and prove results about existence and rigidity.
Ivey, Thomas, Landsberg, J. M.
openaire   +4 more sources

Applying muscle synergy analysis to forearm high-density electromyography of healthy people

open access: yesFrontiers in Neuroscience, 2022
IntroductionMuscle synergy is regarded as a motor control strategy deployed by the central nervous system (CNS). Clarifying the modulation of muscle synergies under different strength training modes is important for the rehabilitation of motor-impaired ...
Yanjuan Geng   +4 more
doaj   +1 more source

Cyclic Stretch Alters Vascular Reactivity of Mouse Aortic Segments

open access: yesFrontiers in Physiology, 2017
Large, elastic arteries buffer the pressure wave originating in the left ventricle and are constantly exposed to higher amplitudes of cyclic stretch (10%) than muscular arteries (2%).
Arthur Leloup   +3 more
doaj   +1 more source

Effect of Isometric Handgrip Exercise Training on Resting Blood Pressure in Normal Healthy Adults [PDF]

open access: yesJournal of Clinical and Diagnostic Research, 2014
Introduction: The aim of the present study was to study the effect of isometric handgrip (IHG) exercise training on resting blood pressure in normal healthy volunteers.
Rinku Garg   +4 more
doaj   +1 more source

Isometric Tensor Network States in Two Dimensions [PDF]

open access: yes, 2020
Tensor network states (TNS) are a promising but numerically challenging tool for simulating two-dimensional (2D) quantum many-body problems. We introduce an isometric restriction of the TNS ansatz that allows for highly efficient contraction of the ...
Pollmann, Frank, Zaletel, Michael P.
core   +3 more sources

Maximal strength measurement: A critical evaluation of common methods—a narrative review

open access: yesFrontiers in Sports and Active Living, 2023
Measuring maximal strength (MSt) is a very common performance diagnoses, especially in elite and competitive sports. The most popular procedure in test batteries is to test the one repetition maximum (1RM).
Konstantin Warneke   +8 more
doaj   +1 more source

On m-Isometric Semigroups, and 2-Isometric Cogenerators [PDF]

open access: yesIntegral Equations and Operator Theory, 2019
It is known that a $C_0$-semigroup of Hilbert space operators is $m$-isometric if and only if its generator satisfies a certain condition, which we choose to call $m$-skew-symmetry. This paper contains two main results: We provide a Lumer--Phillips type characterization of generators of $m$-isometric semigroups.
openaire   +3 more sources

Mechanomyographic Parameter Extraction Methods: An Appraisal for Clinical Applications

open access: yesSensors, 2014
The research conducted in the last three decades has collectively demonstrated that the skeletal muscle performance can be alternatively assessed by mechanomyographic signal (MMG) parameters.
Morufu Olusola Ibitoye   +4 more
doaj   +1 more source

Assessing the Validity and Reliability of A Low-Cost Microcontroller-Based Load Cell Amplifier for Measuring Lower Limb and Upper Limb Muscular Force

open access: yesSensors, 2020
Lower and upper limb maximum muscular force development is an important indicator of physical capacity. Manual muscle testing, load cell coupled with a signal conditioner, and handheld dynamometry are three widely used techniques for measuring isometric ...
Julie Gaudet, Grant Handrigan
doaj   +1 more source

Excursion of bone-patella tendon-bone grafts during the flexion–extension movement in anterior cruciate ligament reconstruction: Comparison between isometric and anatomic reconstruction techniques

open access: yesAsia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology, 2015
Background/objective: The purpose of this study was to elucidate the biomechanical differences between anterior cruciate ligament (ACL) grafts reconstructed by isometric and anatomic reconstruction techniques, based on their length changes.
Yasuhiro Take   +5 more
doaj   +1 more source

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