Results 11 to 20 of about 2,185 (129)

Geometric aspects of 2-walk-regular graphs [PDF]

open access: yes, 2013
A $t$-walk-regular graph is a graph for which the number of walks of given length between two vertices depends only on the distance between these two vertices, as long as this distance is at most $t$. Such graphs generalize distance-regular graphs and $t$
Cámara, Marc   +3 more
core   +1 more source

Accuracy assessment of Tri-plane B-mode ultrasound for non-invasive 3D kinematic analysis of knee joints [PDF]

open access: yes, 2016
BACKGROUND Currently the clinical standard for measuring the motion of the bones in knee joints with sufficient precision involves implanting tantalum beads into the bones.
Lambert, Andrew   +4 more
core   +1 more source

The Wright Brothers: First Aeronautical Engineers and Test Pilots [PDF]

open access: yes, 2003
Sir George Cayley invented the conventional configuration of the airplane at the turn of the 19th century. Otto Lilienthal realized that building a successful aircraft meant learning how to fly; he became the first hang glider pilot and also the first ...
Culick, F. E. C.
core   +1 more source

Resolving sets for Johnson and Kneser graphs [PDF]

open access: yes, 2012
A set of vertices $S$ in a graph $G$ is a {\em resolving set} for $G$ if, for any two vertices $u,v$, there exists $x\in S$ such that the distances $d(u,x) \neq d(v,x)$.
Alberto Márquez   +37 more
core   +2 more sources

New Universal Strain Software Accurately Assesses Cardiac Systolic and Diastolic Function Using Speckle Tracking Echocardiography [PDF]

open access: yes, 2014
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/108658/1/echo12512 ...
Chetcuti, Stanley J.   +6 more
core   +1 more source

Strain‐based characterization of atrioventricular and left atrial remodelling in rat models of heart failure with preserved ejection fraction

open access: yesExperimental Physiology, EarlyView.
Abstract Current experimental models of heart failure with preserved ejection fraction (HFpEF) lack standardized approaches for evaluating left atrial (LA) remodelling and atrioventricular (AV) coupling, leaving a critical gap in mechanistic understanding and phenotypic characterization. This study aimed to explore LA function and AV coupling status in
Qingfeng Zhang   +4 more
wiley   +1 more source

Regular graphs with maximal energy per vertex [PDF]

open access: yes, 2014
We study the energy per vertex in regular graphs. For every k, we give an upper bound for the energy per vertex of a k-regular graph, and show that a graph attains the upper bound if and only if it is the disjoint union of incidence graphs of projective ...
Haemers, Willem H.   +2 more
core   +3 more sources

Females exhibit greater cardiac volume reductions with expiratory muscle loading during submaximal exercise compared to males

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Intrathoracic pressure (ITP) manipulation during submaximal exercise reveals load‐ and sex‐specific cardiac volume responses. Inspiratory loading increased oesophageal pressure swings and the work of breathing (Wb) but did not alter stroke volume (SV) or ventricular volumes in males or females.
Sarah A. Angus   +6 more
wiley   +1 more source

Total Bolus Transit Time Predicts Cardiac Dysfunction in Acute Ischemic Stroke and Transient Ischemic Attack Patients: A Retrospective Double Center Study

open access: yesEuropean Journal of Neurology, Volume 33, Issue 3, March 2026.
This study investigates the association between total bolus transit time, measured during emergency brain CT‐Angiography as the ΔT100‐40HU, and cardiac function in patients with ischemic stroke or transient ischemic attack (TIA). We observed an inverse correlation between ΔT100‐40HU and left ventricular ejection fraction, indicating that longer transit
Simone Bellavia   +13 more
wiley   +1 more source

Genetic deletion of ASIC3 alters left ventricular remodeling and autonomic function after myocardial infarction in mice

open access: yesPhysiological Reports, Volume 14, Issue 5, March 2026.
Abstract Cardiac afferent neurons have been shown to trigger overactivation of neurohormonal systems known to drive adverse cardiac remodeling following myocardial infarction (MI). Acid‐sensing ion channels (ASICs) that are highly expressed in cardiac sympathetic afferents sense ischemia‐induced myocardial acidosis.
Karley M. Monaghan   +14 more
wiley   +1 more source

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