29 Result(s)

Article

The Driving Mechanism for Unidirectional Blood Flow in the Tubular Embryonic Heart

The embryonic heart of vertebrate embryos, including humans, has a tubular thick-wall structure when it first starts to beat. The tubular embryonic heart (TEH) does not have valves, and yet, it produces an eff...

Pavel Kozlovsky, Robert J. Bryson-Richardson… in Annals of Biomedical Engineering (2016)

Article

Fully coupled fluid–structure interaction model of congenital bicuspid aortic valves: effect of asymmetry on hemodynamics

A bicuspid aortic valve (BAV) is a congenital cardiac disorder where the valve consists of only two cusps instead of three, as in a normal tricuspid valve (TAV). Although 97 % of BAVs include asymmetric cusps,...

Gil Marom, Hee-Sun Kim, Moshe Rosenfeld… in Medical & Biological Engineering & Computi… (2013)

Chapter

In Praise of the Gram Matrix

We use the Gram matrix to prove that the largest number of points in R ^d such that the distance between all pairs is an odd integer (the square root of an odd integer...

Moshe Rosenfeld in The Mathematics of Paul Erdős I (2013)

Article

A fluid–structure interaction model of the aortic valve with coaptation and compliant aortic root

While aortic valve root compliance and leaflet coaptation have significant influence on valve closure, their implications have not yet been fully evaluated. The present study developed a full fluid–structure i...

Gil Marom, Rami Haj-Ali, Ehud Raanani… in Medical & Biological Engineering & Computi… (2012)

Article

Equipartite polytopes

A polytope P with 2n vertices is called equipartite if for any partition of its vertex set into two equal-size sets V ₁ and V ₂, there is an isometry of the polytop...

Branko Grünbaum, Tomáš Kaiser, Daniel Král’… in Israel Journal of Mathematics (2010)

Article

Numerical Simulation of the Airflow Across Trees in a Windbreak

The flow across a three-dimensional (3-D) windbreak comprising individual cypress trees is studied to establish the significance and extent of the 3-D flow patterns. The cypress tree is modelled as a solid cyl...

Moshe Rosenfeld, Gil Marom, Arieh Bitan in Boundary-Layer Meteorology (2010)

Article

Equipartite graphs

A graph G of even order is weakly equipartite if for any partition of its vertex set into subsets V ₁ and V ₂ of equal size the induced subgraphs G[V ...

Branko Grünbaum, Tomáš Kaiser, Daniel Král’… in Israel Journal of Mathematics (2008)

Article

The Hemodynamics of the Berlin Pulsatile VAD and the Role of its MHV Configuration

The 3D flow in a model of the Berlin ventricular assist device (VAD) chamber with monoleaflet valves placed in S-shape conduits was simulated numerically. The blood flow dynamics were described in terms of flo...

Idit Avrahami, Moshe Rosenfeld, Shmuel Einav in Annals of Biomedical Engineering (2006)

Article

The Air-Conditioning Capacity of the Human Nose

The nose is the front line defender of the respiratory system. Unsteady simulations in three-dimensional models have been developed to study transport patterns in the human nose and its overall air-conditionin...

Sara Naftali, Moshe Rosenfeld, Michael Wolf… in Annals of Biomedical Engineering (2005)

Article

The Prism Over the Middle-levels Graph is Hamiltonian

Let B _k be the bipartite graph defined by the subsets of {1,…,2k + 1} of size k and k + 1. We prove that the prism over B _...

Peter Horák, Tomáš Kaiser, Moshe Rosenfeld, Zdeněk Ryjáček in Order (2005)

Article

A Three-Dimensional Numerical Fluid Dynamic Model of Antigen–Antibody Surface Adsorption on Piezoelectric Immunosensors

A piezoelectric crystal is a unit that changes its frequency in parallel with a change in its mass. This characteristic is exploited in designing flow cell-based immunosensors for detecting the concentration o...

Deganit Barak-Shinar, Moshe Rosenfeld, Einat Zisman… in Annals of Biomedical Engineering (2002)

Article

Induced Current Impedance Technique for Monitoring Brain Cryosurgery in a Two-Dimensional Model of the Head

A fast and robust finite volume solver of the two-dimensional induced current electrical impedance forward problem was developed. The numerical solver was validated by comparison with an existing analytical so...

Sharon Zlochiver, Michal M. Radai, Moshe Rosenfeld… in Annals of Biomedical Engineering (2002)

Article

On the Effect of Pipe Boundary Layer Growth on the Formation of a Laminar Vortex Ring Generated by a Piston/Cylinder Arrangement

The growth of a boundary layer at the nozzle wall during laminar vortex ring formation by a nozzle flow generator (piston/cylinder arrangement) is analysed theoretically and numerically and used for modelling ...

Michael Shusser, Morteza Gharib… in Theoretical and Computational Fluid Dynami… (2002)

Article

A Computational Fluid Dynamic Model of Antigen–Antibody Surface Adsorption on a Piezoelectric Immunosensor

A novel computational fluid dynamic model describing the antigen–antibody binding on an electrode surface is presented. It was assumed that the adsorption rate of the antibody sample is dependent upon the flow...

Deganit Barak-Shinar, Moshe Rosenfeld, Einat Zisman… in Annals of Biomedical Engineering (2000)

Chapter and Conference Paper

The Evolution of Hairpin Vortices in Shear Flows

The evolution of artificially generated localized disturbances having the shape of hairpins, in laminar axisymmetric rotating shear flows, is experimentally [1] and numerically investigated. The results are co...

Edwin Malkiel, Vladimir Levinski, Moshe Rosenfeld… in Laminar-Turbulent Transition (2000)

Chapter

In Praise of the Gram Matrix

We use the Gram matrix to prove that the largest number of points in R ^d such that the distance between all pairs is an odd integer (the square root of an odd i...

Moshe Rosenfeld in The Mathematics of Paul Erdös II (1997)

Chapter and Conference Paper

The generalized alternating direction multi-zone implicit method

Moshe Rosenfeld, Yuval Yassour in Fifteenth International Conference on Nume… (1997)