Results 11 to 20 of about 824,434 (194)

Subjective Cognitive Concerns and Cognitive Trajectories in Parkinson's Disease: Biomarker Impact [PDF]

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the relationship of subjective cognitive concerns (SCC) with biomarkers of Alzheimer's disease (AD), neurodegeneration, and Parkinson's disease (PD) and domain‐specific cognitive trajectories among cognitively unimpaired persons with de novo PD. Method Cognitively unimpaired participants with SCC (n = 294) and without SCC (
Francesca V. Lopez   +5 more
wiley   +2 more sources

Preliminary design of multiple gravity-assist trajectories [PDF]

open access: yes, 2006
In this paper the preliminary design of multiple gravity-assist trajectories is formulated as a global optimization problem. An analysis of the structure of the solution space reveals a strong multimodality, which is strictly dependent on the complexity ...
Vasile, Massimiliano, De Pascale, Paolo
core   +5 more sources

Global optimisation of multiple gravity assist trajectories [PDF]

open access: yes, 2010
Multiple gravity assist (MGA) trajectories represent a particular class of space trajectories in which a spacecraft exploits the encounter with one or more celestial bodies to change its velocity vector; they have been essential to reach high Delta-v ...
Ceriotti, M.
core   +4 more sources

Time-optimal trajectories to circumsolar space using solar electric propulsion [PDF]

open access: yes, 2013
The aim of this paper is to explore the capabilities of a solar electric propelled spacecraft on a mission towards circumsolar space. Using an indirect approach, the paper investigates minimum time of transfer (direct) trajectories from an initial ...
Vasile, Massimiliano   +2 more
core   +4 more sources

Robot Excitation Trajectories for Dynamic Parameter Estimation using Optimized B-Splines [PDF]

open access: yes, 2012
In this paper we adressed the problem of finding exciting trajectories for the identification of manipulator link inertia parameters. This can be formulated as a constraint nonlinear optimization problem.
Hirzinger, Gerd   +5 more
core   +1 more source

Jointly modeling time-varying offending profiles and criminal career trajectories in a sample of sexual offenders : A multivariate approach to modelling criminal careers [PDF]

open access: yes, 2012
The study begins by summarising three key topics of research in criminal careers of sexual offenders: explaining the observed bimodality of the age-crime curve for sexual offenders; determining whether rapists and child molesters follow well-separated ...
Weldon, Matthew, Francis, Brian
core   +4 more sources

Optimal low-thrust trajectories to asteroids through an algorithm based on differential dynamic programming [PDF]

open access: yes, 2009
In this paper an optimisation algorithm based on Differential Dynamic Programming is applied to the design of rendezvous and fly-by trajectories to near Earth objects. Differential dynamic programming is a successive approximation technique that computes
Vasile, M.   +5 more
core   +4 more sources

The SOSAA Trajectories Dataset

open access: yes, 2023
The SOSAA Trajectories Dataset includes the settings, inputs, and outputs of several trajectory runs of the SOSAA model.If you use this dataset, please cite it using the metadata from this ...
Clusius, Petri, Tyree, Juniper
core   +1 more source

Search space pruning and global optimization of multiple gravity assist trajectories with deep space manoeuvers [PDF]

open access: yes, 2007
This paper deals with the design of optimal multiple gravity assist trajectories with deep space manoeuvres. A pruning method which considers the sequential nature of the problem is presented.
Becerra, Victor M.   +4 more
core   +4 more sources

Home - About - Disclaimer - Privacy