Results 91 to 100 of about 75,227 (277)

Basal Forebrain Volume and Concurrent Hallucinations and Mild Cognitive Impairment in Parkinson's Disease

open access: yesMovement Disorders Clinical Practice, EarlyView.
Abstract Background Visual hallucinations (VH) and mild cognitive impairment (MCI) often co‐occur in Parkinson's Disease (PD). Each symptom in isolation is associated with cholinergic basal forebrain (BF) atrophy. However, it is unclear whether BF integrity relates to one symptom preferentially or to their co‐occurrence, and whether this relationship ...
Sabrina M. Adamo   +6 more
wiley   +1 more source

Research on the Loran-C Pseudorange Positioning Method Based on an Ellipsoidal Geodesic Model and Its Application in Inland Areas

open access: yesSensors
The Loran-C system employs the spherical hyperbola positioning (SHP) method. However, SHP has three drawbacks in inland regions: first, approximating the Earth’s ellipsoid as a sphere introduces positioning errors; second, hyperbola positioning ...
Ao Gao   +6 more
doaj   +1 more source

Introduction to Individual Contribution by the VI Scientific and Professional Conferences with International Participation Geodesy, Cartography and Geographic Information Systems 2010 [PDF]

open access: yesActa Montanistica Slovaca, 2011
This contribution contains a selection of articles from 6th Scientific Conference with International Participation "Geodesy,Cartography and Geographical Information Systems 2010".
Janka Sabová, Juraj Gašinec
doaj  

Navigation satellites [PDF]

open access: yes, 1964
Satellite navigation system - geodesy ...
Kershner, R. B.
core   +1 more source

A Geometric Interpretation for the Algebraic Properties of Second‐Order Ordinary Differential Equations

open access: yesMathematical Methods in the Applied Sciences, Volume 48, Issue 6, Page 6912-6917, April 2025.
ABSTRACT Nowadays, a substantial portion of investigations concerning the symmetry analysis of differential equations predominantly adhere to a framework comprising the following key procedures: (i) the derivation of symmetries, (ii) the determination of an optimal system, (iii) the utilization of these symmetries to construct invariants or ...
A. Paliathanasis   +2 more
wiley   +1 more source

Abstract Boundary Delay Systems and Application to Network Flow

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper investigates the well‐posedness and positivity of solutions to a class of delayed transport equations on a network. The material flow is delayed at the vertices and along the edges. The problem is reformulated as an abstract boundary delay equation, and well‐posedness is proved by using the Staffans–Weiss theory.
András Bátkai   +2 more
wiley   +1 more source

VideoCar in finančne plati zajema cestnih podatkov v občinah : VideoCar and the Financial Aspects of Community Road-Data Acquisition [PDF]

open access: yesGeodetski Vestnik, 2003
In the article there are two (often overlooked) aspects laid out regarding the important role and the influence of geodesy on the life of communities.
Domen Smole
doaj  

Discoveries from space exploration [PDF]

open access: yes, 1964
Space science contributions in astrophysics, geodesy, geology, meteorology, and ...
Jastrow, R.
core   +1 more source

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