Results 151 to 160 of about 3,971,309 (348)

Impact of enhanced leaf model on dose calculation accuracy in single‐isocenter multitarget stereotactic radiosurgery treatments

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Single‐isocenter multitarget (SIMT) radiosurgery has become increasingly popular as advancement in planning and delivery systems have made this approach clinically viable. With targets varying in size and distance from isocenter, SIMT plans are highly complex with dynamic multileaf collimator (MLC) motion.
Hem Moktan, Hongyu Jiang, H. Harold Li, Kenny Guida   +3 more
wiley   +1 more source

Computational Dynamical Systems [PDF]

arXiv
We study the computational complexity theory of smooth, finite-dimensional dynamical systems. Building off of previous work, we give definitions for what it means for a smooth dynamical system to simulate a Turing machine. We then show that 'chaotic' dynamical systems (more precisely, Axiom A systems) and 'integrable' dynamical systems (more generally,
arxiv  

Geometric and Ergodic Theory of Hyperbolic Dynamical Systems [PDF]

, 1998
Lai-Sang Young
openalex   +1 more source

Epigenome‐wide association study, meta‐analysis, and multiscore profiling of whole blood in Parkinson's disease

Annals of Clinical and Translational Neurology, EarlyView.
Abstract Objectives An increasing body of evidence indicates altered DNA methylation in Parkinson's disease, yet the reproducibility and utility of such methylation changes are largely unexplored. We aimed to further elucidate the role of dysregulated DNA methylation in Parkinson's disease and to evaluate the biomarker potential of methylation‐based ...
Ingeborg Haugesag Lie, Manuela M. X. Tan, Maren Stolp Andersen, Mathias Toft, Lasse Pihlstrøm   +4 more
wiley   +1 more source

Relationship of cognitive decline with glucocerebrosidase activity and amyloid‐beta 42 in DLB and PD

Annals of Clinical and Translational Neurology, EarlyView.
Abstract Objective Dementia with Lewy bodies (DLB) and Parkinson's disease (PD) share clinical, pathological, and genetic risk factors, including GBA1 and APOEε4 mutations. Biomarkers associated with the pathways of these mutations, such as glucocerebrosidase enzyme (GCase) activity and amyloid‐beta 42 (Aβ42) levels, may hold potential as predictive ...
Maria Camila Gonzalez, Linn Oftedal, Johannes Lange, Diego Alejandro Tovar‐Rios, Ole‐Bjørn Tysnes, Claire Paquet, Marta Marquié, Mercè Boada, Daniel Alcolea, Konrad Rejdak, Ewa Papuc, Jakub Hort, Cristian Falup‐Pecurariu, Dag Aarsland, Guido Alves, Jodi Maple‐Grødem   +15 more
wiley   +1 more source

Liraglutide for idiopathic intracranial hypertension: a real‐world propensity score‐matched study

Annals of Clinical and Translational Neurology, EarlyView.
Abstract Objective Idiopathic intracranial hypertension (IIH) is a neurological disorder predominantly affecting young women with obesity, characterized by elevated intracranial pressure. While current treatments include weight loss counseling, medical therapies, and surgical interventions, their limitations necessitate exploring novel therapeutic ...
Ahmed Y. Azzam, Muhammed Amir Essibayi, Dhrumil Vaishnav, Mohammed A. Azab, Mahmoud M. Morsy, Osman Elamin, Adam Elswedy, Oday Atallah, Hana J. Abukhadijah, Adam A. Dmytriw, Amanda Baker, Deepak Khatri, Neil Haranhalli, David J. Altschul   +13 more
wiley   +1 more source

Koopman Operators for Global Analysis of Hybrid Limit-Cycling Systems: Construction and Spectral Properties [PDF]

arXiv
This paper reports a theory of Koopman operators for a class of hybrid dynamical systems with globally asymptotically stable periodic orbits, called hybrid limit-cycling systems. We leverage smooth structures intrinsic to the hybrid dynamical systems, thereby extending the existing theory of Koopman operators for smooth dynamical systems.
arxiv  

Theory and applications of the systematic detection of unstable periodic orbits in dynamical systems [PDF]

, 2000
Detlef Pingel, Peter Schmelcher, F. Κ. Diakonos, Ofer Biham   +3 more
openalex   +1 more source

An MRI assessment of mechanisms underlying lesion growth and shrinkage in multiple sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
By applying the tensor model, we analysed lesion orientation and the directionality of lesion expansion/contraction in multiple sclerosis. Each lesion is summarized as an ellipsoid, and the tensor model is applied to calculate lesion anisotropy. From the top to the bottom white matter atlas, surface‐in gradient segmentation and venous atlas used in the
Ermelinda De Meo, Ferran Prados Carrasco, J. William L. Brown, Alasdair J. Coles, Nick G. Cunniffe, Amy E. Jolly, Baris Kanber, Rebecca Samson, Frederik Barkhof, Declan Chard   +9 more
wiley   +1 more source

Theory and mathematics in building dynamic systems models: what prevails? A reply to van der Maas and Raijmakers [PDF]

, 2000
E. Saskia Kunnen, Tjeert Olthof, Jan Boom   +2 more
openalex   +1 more source