Results 111 to 120 of about 42,367 (255)

Modeling the Intermediate Flow Regime in Flow‐Compensated Intravoxel Incoherent Motion MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The intravoxel incoherent motion (IVIM) model is commonly used to separate the effects of motion related to diffusion and blood microcirculation (perfusion) on the MR signal. Depending on the encoding time (T), it is possible to probe the different temporal regimes of blood motion, which resemble a ballistic flow at short T and a ...
Louise Rosenqvist, Mikael Montelius, Isabella M. Björkman‐Burtscher, Elina Petersson, Maria Ljungberg, Oscar Jalnefjord   +5 more
wiley   +1 more source

Effective run-and-tumble dynamics of bacteria baths

, 2013
{\it E. coli} bacteria swim in straight runs interrupted by sudden reorientation events called tumbles. The resulting random walks give rise to density fluctuations that can be derived analytically in the limit of non interacting particles or ...
Angelani, L., Di Leonardo, R., Paoluzzi, M.   +2 more
core   +1 more source

Toward Optimized Intravoxel Incoherent Motion (IVIM) and Compartmental T2 Mapping in Abdominal Organs

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To quantitatively assess the bias in the intravoxel incoherent motions (IVIM)–derived pseudo‐diffusion volume fraction (f) caused by the differences in relaxation times between the tissue and fluid compartments, and to develop a two‐dimensional (b‐value‐TE) fitting approach for simultaneous T2 and IVIM parameter estimation along with ...
Julia Stabinska, Thomas A. Thiel, Hans‐Jörg Wittsack, Alexandra Ljimani, Helge J. Zöllner   +4 more
wiley   +1 more source

Impact response and post-impact compression behavior of two-dimensional triaxially braided carbon fiber composites

Cailiao gongcheng
The two-dimensional triaxially braided composites are prepared by the resin transfer molding process. The mechanical response of two-dimensional triaxially braided composite under high and low velocity impact are investigated through the air gun system ...
SUN Yang, HUANG Jian, ZHAO Zhenqiang, ZHOU Haili, LI Chao, ZHANG Liquan, ZHANG Chao   +6 more
doaj   +1 more source

Infinite densities for L\'evy walks

, 2014
Motion of particles in many systems exhibits a mixture between periods of random diffusive like events and ballistic like motion. In many cases, such systems exhibit strong anomalous diffusion, where low order moments $< |x(t)|^q >$ with $q$ below a ...
Barkai, Eli, Denisov, Sergey, Hanggi, Peter, Rebenshtok, Adi   +3 more
core   +1 more source

Simulation‐Informed Evaluation of Microvascular Parameter Mapping for Diffusion MR Imaging of Solid Tumours

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose We aim to inform the design of new diffusion MRI (dMRI) approaches for microvasculature quantification that enhance the biological specificity of imaging towards cancer. Methods We adopted simulation‐informed modelling of the vascular dMRI signal. We synthesised signals from 1500 synthetic vascular networks, for a variety of protocols (
Anna Kira Voronova, Olivia Prior, Athanasios Grigoriou, Francesc Salvà, Elena Elez, Luz M. Atlagich, Roser Sala‐Llonch, Marco Palombo, Els Fieremans, Dmitry S. Novikov, Raquel Perez‐Lopez, Francesco Grussu   +11 more
wiley   +1 more source

Two Interacting Electrons in a Quasiperiodic Chain

, 1997
We study numerically the effect of on-site Hubbard interaction U between two electrons in the quasiperiodic Harper's equation. In the periodic chain limit by mapping the problem to that of one electron in two dimensions with a diagonal line of impurities
A. Barelli, B. Kramer, B. L. Altshuler, B. L. Altshuler, D. E. Katsanos, D. L. Shepelyansky, D. L. Shepelyansky, D. R. Hofstadter, D. Weinmann, E. Z. Kuchinski, H. Hiramoto, I. V. Ponomarev, J. Hubbard, K. Frahm, K. Frahm, K. Frahm, M. Ya. Azbel, N. F. Mott, O. N. Dorokhov, P. Jacquod, P. W. Anderson, R. A. Romer, R. Rammal, S. Aubry, S. J. Xiong, S. N. Evangelou, S. N. Evangelou, S. N. Evangelou, S. N. Evangelou, Y. B. Xie, Y. Imry, Y. V. Fyodorov   +31 more
core   +2 more sources

Motion‐Compensated Diffusion Imaging With Phase‐Contrast for Robust Quantification of Regional Cerebral Blood Flow

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop and evaluate a motion‐compensated diffusion imaging with phase‐contrast (MC‐DIP) technique for mitigating errors in regional cerebral blood flow (rCBF) quantification caused by physiological brain motion. Methods Diffusion‐weighted images were acquired in 11 healthy volunteers on a 3.0 T MRI system using three gradient ...
Naoki Ohno, Tosiaki Miyati, Genki Nambu, Yu Ueda, Yuki Makino, Noam Alperin, Satoshi Kobayashi   +6 more
wiley   +1 more source

Active and Passive Transport of Cargo in a Corrugated Channel: A Lattice Model Study

, 2018
Inside cells, cargos such as vesicles and organelles are transported by molecular motors to their correct locations via active motion on cytoskeletal tracks and passive, Brownian diffusion. During the transportation of cargos, motor-cargo complexes (MCC)
Ching, Kevin, Das, Moumita, Dey, Supravat   +2 more
core   +1 more source

Experimental and Numerical Investigation on the Dynamic Impact Response of Hat‐Shaped Basalt Fiber‐Reinforced Polymer Composite Structures With Improved Interfacial Properties

Polymer Composites, EarlyView.
Graphical abstract illustrating the experimental design and key findings of the study. ABSTRACT Basalt fiber‐reinforced polymer (BFRP) composites are gaining attention as sustainable alternatives to conventional fiber‐reinforced polymers owing to their favorable mechanical properties and environmental advantages.
Abdulrahman Adeiza Musa, Min Gyu Kim, Anand Prakash Jaiswal, Thuan Ho‐Nguyen‐Tan, Jaesang Yu, Soon Ho Yoon, Azikiwe Peter Onwualu, Minkook Kim   +7 more
wiley   +1 more source