Results 61 to 70 of about 1,343,954 (317)

Geodesic mappings of quasi-Einstein spaces with a constant scalar curvature

open access: yesМатематичні Студії, 2020
In this paper we study a special type of pseudo-Riemannian spaces - quasi-Einstein spaces of constant scalar curvature. These spaces are generalizations of known Einstein spaces.
V. A. Kiosak, G. V. Kovalova
doaj   +1 more source

Geodesics in the Space of Measure-Preserving Maps and Plans [PDF]

open access: yesArchive for Rational Mechanics and Analysis, 2008
We study Brenier's variational models for incompressible Euler equations. These models give rise to a relaxation of the Arnold distance in the space of measure-preserving maps and, more generally, measure-preserving plans. We analyze the properties of the relaxed distance, we show a close link between the Lagrangian and the Eulerian model, and we ...
AMBROSIO, Luigi, FIGALLI A.
openaire   +4 more sources

Advancing Age Modulates Associations Between Cognitive Impairment and Brain Volumes in Early MS

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Cognitive impairment is common in multiple sclerosis (MS), but manifestations following the first demyelinating event are relatively unexplored. We investigated cross‐sectional associations between magnetic resonance imaging (MRI)–derived brain volumes and the presence of cognitive impairment outcomes five years after the first ...
Piriyankan Ananthavarathan   +14 more
wiley   +1 more source

Resolvents of equilibrium problems on a complete geodesic space with curvature bounded above

open access: yesCarpathian Journal of Mathematics, 2021
We consider equilibrium problems on a complete geodesic space with curvature bounded above by one and propose the notion of resolvents for this problem.
Y. Kimura
semanticscholar   +1 more source

Nickel‐Free Synthesis of Poly(pyrene‐4,5,9,10‐tetraone) for Sodium‐based Batteries: Insights into Electrode Architecture and Reversible Na‐ion Insertion

open access: yesAdvanced Energy Materials, EarlyView.
A nickel‐free and practical synthesis strategy to poly(pyrene tetraone) and its integration with a percolated CNTs/Ketjen Black network enables stable cycling and efficient energy storage in a sodium‐based batteries. This work demonstrates how controlling polymer structure and electrode architecture improves ion transport and mitigates dissolution in ...
Md. Adil   +9 more
wiley   +1 more source

Retinal Vessel Segmentation: A Comprehensive Review From Classical Methods to Deep Learning Advances (1982–2025)

open access: yesAdvanced Intelligent Systems, EarlyView.
Four decades of retinal vessel segmentation research (1982–2025) are synthesized, spanning classical image processing, machine learning, and deep learning paradigms. A meta‐analysis of 428 studies establishes a unified taxonomy and highlights performance trends, generalization capabilities, and clinical relevance.
Avinash Bansal   +6 more
wiley   +1 more source

Fast Obstacle Detection for Monocular Autonomous Mobile Robots

open access: yesSICE Journal of Control, Measurement, and System Integration, 2017
This paper proposes a monocular vision based obstacle detection algorithm for autonomous mobile robots. Our main algorithm consists of two stages. In the first stage, we use an inverse perspective mapping (IPM) based method for detecting small portions ...
Naoshi Kaneko   +2 more
doaj   +1 more source

A smooth tool path planning method on NURBS surface based on the shortest boundary geodesic map

open access: yes, 2020
To fill the development gap between computer-aided design (CAD) and computer-aided manufacturing (CAM) on non-uniform rational b-spline (NURBS), a general tool path planning method on NURBS surface is proposed in this study.
Fusheng Liang, Chengwei Kang, F. Fang
semanticscholar   +1 more source

Towards Advanced Intelligent and Perceptive Soft Grippers

open access: yesAdvanced Intelligent Systems, EarlyView.
Implementing soft yet strong and intelligent soft grippers request innovative and creative solutions in designing soft bodies and seamlessly integrating actuated systems with hierarchical sensing. This review systematically analyses soft grippers with a deep understanding of core components, from fundamental design principles to actuation and sensing ...
Haneul Kim   +4 more
wiley   +1 more source

CARTOGRAPHYCALPECULIARITY OFARCHEOLOGICAL MONUMENTS

open access: yesInterCarto. InterGIS, 2015
In the work there is discussed necessity of creating archeological maps and geoinformational systems of state’s historical parts.Author has analyzed topo- geodesic works executed for cartography making of historical monuments in Zemo Abkhazia (Dali’s ...
R. Sh. Tolordava   +3 more
doaj   +1 more source

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