Results 61 to 70 of about 72,600 (267)

Differential Progression of Neuroinflammation in Patients with Isolated Rapid‐Eye‐Movement Sleep Behavior Disorder

open access: yesMovement Disorders, EarlyView.
Abstract Background Neuroinflammation, measured using [11C](R)‐PK11195 positron emission tomography (PET), has been reported in isolated rapid‐eye‐movement sleep behavior disorder (iRBD), but its temporal progression is unknown. Objective The aim was to assess longitudinal progression of neuroinflammation in iRBD patients and its relationship with ...
Andreas Myhre Baun   +17 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

Projekt nove gravimetrične mreže 1. reda Republike Slovenije : Project of new 1st Order Gravimetric Network of the Republic of [PDF]

open access: yesGeodetski Vestnik, 2006
The project of a new gravimetric network of Slovenia is presented. It resulted from the needs for the new gravimetric and height systems of Slovenia, all parts of the new national coordinate system.
Božo Koler, Klemen Medved, Miran Kuhar
doaj  

Fusion of GNSS and Satellite Radar Interferometry: Determination of 3D Fine-Scale Map of Present-Day Surface Displacements in Italy as Expressions of Geodynamic Processes

open access: yesRemote Sensing, 2019
We present a detailed map of ground movement in Italy derived from the combination of the Global Navigation Satellite System (GNSS) and Satellite Synthetic Aperture Radar (SAR) interferometry.
Gregorio Farolfi   +2 more
doaj   +1 more source

Applications of satellite and marine geodesy to operations in the ocean environment [PDF]

open access: yes
The requirements for marine and satellite geodesy technology are assessed with emphasis on the development of marine geodesy. Various programs and missions for identification of the satellite geodesy technology applicable to marine geodesy are analyzed ...
Fubara, D. M., Mourad, A. G.
core   +1 more source

A Fast Radio Burst Search Method for VLBI Observation

open access: yes, 2018
We introduce the cross spectrum based FRB (Fast Radio Burst) search method for VLBI observation. This method optimizes the fringe fitting scheme in geodetic VLBI data post processing, which fully utilizes the cross spectrum fringe phase information and ...
Liu, Lei   +4 more
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

Multiple wavelength geodesy [PDF]

open access: yes
An apparatus is being constructed which should be able to measure baselines up to 50 km long with a fractional uncertainty of about 5 x 10 to the -8 power.
Levine, J.
core   +1 more source

A Nash-Hormander iteration and boundary elements for the Molodensky problem

open access: yes, 2013
We investigate the numerical approximation of the nonlinear Molodensky problem, which reconstructs the surface of the earth from the gravitational potential and the gravity vector.
Costea, Adrian   +2 more
core   +1 more source

Ancient people and living nature: A global perspective on archaeological areas and biodiversity

open access: yesPeople and Nature, EarlyView.
Abstract Archaeological sites are not only of cultural and historical significance but also contribute to biodiversity conservation. Often marked by limited human disturbance and distinct ecological conditions, these areas serve as important refuges for various plant and animal species, playing a vital role in global conservation efforts.
Antonio Romano   +3 more
wiley   +1 more source

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