Results 81 to 90 of about 13,882 (205)

Coronary Artery Blood Flow Imaging Using 3D Flow MRI

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1545-1559, March 2026.
ABSTRACT Purpose In this work, a 3D phase contrast (PC) technique is presented, which enables flow velocity measurements in three spatial directions, simultaneously covering the proximal left (LCA) and right (RCA) coronary arteries and yielding both morphological and flow information.
Denise Lichthardt, Michaela Schmidt, Jens Wetzl, Peter Speier, Manuel Hein, Christopher Schuppert, Armin M. Nagel, Daniel Giese   +7 more
wiley   +1 more source

Flip and Neimark-Sacker Bifurcations of a Discrete Time Predator-Pre Model

IEEE Access, 2019
In this paper, we investigate the system undergoes flip and Neimark Sacker bifurcation in the interior of R+2 by using the center manifold theorem and bifurcation theory. The dynamics of this discrete time predator-pre model is investigated in the closed
Yong Li, Muhammad Rafaqat, Tariq Javed Zia, Imran Ahmed, Chahn Yong Jung   +4 more
doaj   +1 more source

Stability and Cycles in a Cobweb Model with Heterogeneous Expectations [PDF]

We investigate the dynamics of a cobweb model with heterogeneous beliefs, generalizing the example of Brock and Hommes (1997). We examine situations where the agents form expectations by using either rational expectations, or a type of adaptive ...
Clem Tisdell, Laurence Lasselle, Serge Svizzero   +2 more
core  

Real Time Evaluation of Whole Organ Perfusion by Magnetic Resonance Imaging in Ex Vivo Machine‐Perfused Liver

NMR in Biomedicine, Volume 39, Issue 3, March 2026.
Porcine livers underwent mechanical perfusion inside an MRI scanner, enabling dynamic quantitative measurements of whole organ perfusion. Vascular segmentation down to 0.45 mm resolution allowed quantification of morphological features such as vessel tortuosity, while Dynamic Contrast Enhanced MRI and diffusion weighted imaging was used to produce ...
Zainab L. Rai, Natalie A. Holroyd, Morenike Magbagbeola, Emre Doganay, Katie Doyle, Lucy Caselton, Agostino Stilli, Danail Stoyanov, Simon Walker‐Samuel, Brian R. Davidson   +9 more
wiley   +1 more source

Bifurcations and chaos in a discrete SI epidemic model with fractional order

Advances in Difference Equations, 2018
In this study, a new discrete SI epidemic model is proposed and established from SI fractional-order epidemic model. The existence conditions, the stability of the equilibrium points and the occurrence of bifurcation are analyzed.
Mahmoud A. M. Abdelaziz, Ahmad Izani Ismail, Farah A. Abdullah, Mohd Hafiz Mohd   +3 more
doaj   +1 more source

Neuroprotective Nanoplatform Integrating Antioxidant MXene Nanozymes and Ferroptosis Inhibitors for Targeted Therapy of Cerebral Ischemia‐Reperfusion Injury

Advanced Science, Volume 13, Issue 7, 3 February 2026.
Cerebral ischemia‐reperfusion injury (CIRI) is a key pathological process limiting the efficacy of stroke therapy. This study has developed an innovative, multifunctional, brain‐targeted nanoplatform (RFP) containing MXene nanoenzymes and ferroptosis inhibitors.
Lu Wang, Chao Hou, Shuo Li, Lizhi Yang, Yiqun Lin, Sen Wang, Xiaohua Jia, Hui Hui, Wen He, Wei Zhang   +9 more
wiley   +1 more source

SKALE: An Interpretable Multiscale Machine Learning Model for Decoding Phase‐Specific Protein Aggregation in Neurodegenerative Proteinopathies

Aggregate, Volume 7, Issue 2, February 2026.
Protein aggregation drives diverse degenerative diseases, yet its molecular origins are difficult to predict. SKALE uses interpretable machine learning to link sequence, structure, and dynamics, revealing how local structural weakening triggers aggregation.
Wei Xuan Wilson Loo, Jia Shen Sio, Keyin Yap, Yan Shan Loo, Hui Xuan Lim, Shuangyue Zhang, Huitao Liu, Chen Seng Ng   +7 more
wiley   +1 more source

Infrared Devices Versus Traditional Palpation Approach for Peripheral Intravenous Catheter Insertion in Adults: A Systematic Review and Meta‐Analysis

Journal of Advanced Nursing, Volume 82, Issue 2, Page 1775-1790, February 2026.
ABSTRACT Aims This systematic review and meta‐analysis evaluated the efficacy of infrared (IR) devices versus the traditional palpation technique for first‐attempt success of peripheral intravenous catheter (PIVC) insertion in adults. Design Systematic review and meta‐analysis of randomised controlled trials (RCTs).
Bertrand Drugeon, Jessica A. Schults, Gillian Ray‐Barruel, Grace (Hui) Xu, Daner Ball, Hideto Yasuda, Rebecca Drugeon, Julie Mercier, Gabor Mihala, Natalie Barker, Olivier Mimoz, Claire M. Rickard   +11 more
wiley   +1 more source

Pattern Formation Mechanisms of Spatiotemporally Discrete Activator–Inhibitor Model with Self- and Cross-Diffusions

Fractal and Fractional
In this paper, we aim to solve the issue of pattern formation mechanisms in a spatiotemporally discrete activator–inhibitor model that incorporates self- and cross-diffusions.
You Li, Ying Sun, Jingyu Luo, Jiayi Pang, Bingjie Liu   +4 more
doaj   +1 more source

Refusing to Listen: Receptive Audiences and the Political Authority of Speech in Hobbes, Locke, and Mill

Constellations, EarlyView.
Thomas Henry Owings
wiley   +1 more source