Results 51 to 60 of about 17,803,127 (308)

Digital Cognitive Phenotyping for Differential Diagnosis and Monitoring in Neurological Conditions

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To assess the utility, accessibility, and equivalence to supervised scales of online cognitive assessment in older individuals with cognitive impairment. Methods Patients with Alzheimer's disease (AD, n = 31), idiopathic normal pressure hydrocephalus (iNPH, n = 26), and traumatic brain injury (TBI, n = 23) completed online cognitive ...
Martina Del Giovane, Valentina Giunchiglia, Michael C. B. David, Magdalena A. Kolanko, William R. Trender, Peter J. Hellyer, Harmeena Kaur, David J. Sharp, Christopher Carswell, Paresh A. Malhotra, Adam Hampshire   +10 more
wiley   +1 more source

Controlled invariance for nonlinear systems: Two worked examples [PDF]

IEEE Transactions on Automatic Control, 1984
In recent years a (local) nonlinear version of the theory of (A,B)- invariant subspaces has been developed, under suitable regularity conditions, by Hirschhorn, Isidori, Krener, Nijmeijer and van der Schaft. The purpose of the present paper is to illustrate the existing theory by two worked examples. The first example deals with the dynamics of a rigid
Nijmeijer, Henk, van der Schaft, Arjan
openaire   +2 more sources

Evaluation of Dried Plasma Spot‐Based Quantification of Glial Fibrillary Acidic Protein as a Disease‐Associated Biomarker in Neuromyelitis Optica Spectrum Disorder

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To evaluate the diagnostic accuracy of glial fibrillary acidic protein (GFAP) measured in dried plasma spots versus conventional plasma‐ and serum‐GFAP testing for assessment of disease severity in aquaporin‐4 immunoglobulin G–positive neuromyelitis optica spectrum disorder (AQP4‐IgG+ NMOSD).
Felix Wohlrab, Evelyn Alvarez, Roua Hamdi, Bingqing Zhang, Hayeun Ji, Niyati Jhaveri, Patrick Schindler, Pedro Sanchez, Pia S. Sperber, Tanja Schmitz‐Hübsch, Frederike C. Oertel, Nisa Vorasoot, Najib Kissani, Falko Böhringer, Jens Kuhle, Anne‐Katrin Pröbstel, Xiao‐Jun Ma, Péter Körtvelyessy, Patrick Waters, Friedemann Paul   +19 more
wiley   +1 more source

Optimal Control of Nonlinear Multivariable Systems [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2009
This paper concerns a study on the optimal control for nonlinear systems. An appropriate alternative in order to alleviate the nonlinearity of a system is the exact linearization approach.
Ali Qajar, Ramin Bozorgmehry Boozarjomehry,   +1 more
doaj  

Clinical Impact of MGMT Promoter Methylation in IDH‐Mutant Gliomas: Influence of Threshold Selection and Clinical Confounding

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background The clinical relevance of MGMT promoter methylation in IDH‐mutant gliomas remains controversial in the era of molecular classification. We aimed to systematically evaluate its clinical relevance by integrating quantitative assessment, cutoff exploration, and adjustment for clinical confounding.
Haihui Jiang, Linxi Cao, Xiaodong Chen, Siqi Tong, Qinghui Zhu, Jun Yang, Song Lin, Yong Cui   +7 more
wiley   +1 more source

Enhanced precision in robot arm positioning: A nonlinear damping approach for flexible joint manipulators

IET Control Theory & Applications
This article introduces an advanced nonlinear controller designed for optimizing the performance of a single‐link robot arm featuring a flexible joint.
Amir Hossein Jafari, Rached Dhaouadi, Reza Jafari   +2 more
doaj   +1 more source

Cooperative Passivity-Based Control of Nonlinear Mechanical Systems

Robotics, 2023
In this work, we propose two cooperative passivity-based control methods for networks of mechanical systems. By cooperatively synchronizing the end-effector coordinates of the individual agents, we achieve cooperation between systems of different types ...
Oscar de Groot, Laurens Valk, Tamas Keviczky   +2 more
doaj   +1 more source

Frailty Predicts Incident Osteoporotic Fractures in Veterans with Rheumatoid Arthritis

Arthritis Care &Research, EarlyView.
Objective Rheumatoid arthritis (RA) is associated with an increased risk of frailty and osteoporosis, but the relationship between frailty and incident osteoporotic fractures in RA is underexplored. Methods Data were from the Veterans Affairs (VA) Rheumatoid Arthritis Registry. Frailty was measured using the VA Frailty Index (VAFI).
Katherine D. Wysham, Hannah F. Brubeck, Aaron Baraff, Punyasha Roul, Namrata Singh, James S. Andrews, Grant W. Cannon, Gary A. Kunkel, Ted R. Mikuls, Bryant R. England, Dolores M. Shoback, Patricia P. Katz, Jose M. Garcia, Ariela R. Orkaby, Joshua F. Baker   +14 more
wiley   +1 more source

Realization of multivariable nonlinear systems via the approaches of differential forms and differential algebra [PDF]

, 2010
summary:In this paper differential forms and differential algebra are applied to give a new definition of realization for multivariable nonlinear systems consistent with the linear realization theory.
Moog, Claude H., Moog, Claude, Xia, Xiaohua, Moog, Claude, H., Zhang, Jiangfeng, Zhang, Jiangfeng Jeff   +5 more
core   +1 more source

$\mathcal {H}_{2}$- and $\mathcal {H}_\infty$-Optimal Model Predictive Controllers for Robust Legged Locomotion

IEEE Open Journal of Control Systems
This paper formally develops robust optimal predictive control solutions that can accommodate disturbances and stabilize periodic legged locomotion.
Abhishek Pandala, Aaron D. Ames, Kaveh Akbari Hamed   +2 more
doaj   +1 more source