Results 21 to 30 of about 183 (70)

Applications of numerical analysis in navigation [PDF]

open access: yes, 1994
Part one of the thesis contains analysis of the methods of computation in navigation. We start with loxodromic navigation and, although this subject is well documented, we make a positive attempt to analyse the subject matter using the methods of ...
Williams, Roy
core   +1 more source

Hypotheses and tracking results about the longest migration: The case of the arctic tern

open access: yesEcology and Evolution, Volume 9, Issue 17, Page 9511-9531, September 2019., 2019
The arctic tern is probably the animal that performs the longest known migrations. We used geolocator tracking data from a population of arctic terns from the Baltic Sea for evaluating the ecology and evolution of its long‐distance pelagic migration.
Thomas Alerstam   +4 more
wiley   +1 more source

Wavelet-based directional analysis of the gravity field: evidence for large-scale undulations

open access: yes, 2012
International audienceIn the eighties, the analysis of satellite altimetry data leads to the major discovery of gravity lineations in the oceans, with wavelengths between 200 and 1400 km.
Davaille, A   +5 more
core   +3 more sources

Probabilistic En Route Sector Traffic Demand Prediction Based upon Statistical Analysis of Error Distribution Characteristics

open access: yesJournal of Advanced Transportation, Volume 2018, Issue 1, 2018., 2018
In China, air traffic congestion has become increasingly prominent and tends to spread from terminal areas to en route networks. Accurate and objective traffic demand prediction could alleviate congestion effectively. However, the usual demand prediction is based on conjecture method of flying track, and the number of aircraft flying over a sector in a
Wen Tian   +5 more
wiley   +1 more source

Accuracy Improvement of Discharge Measurement with Modification of Distance Made Good Heading

open access: yesAdvances in Meteorology, Volume 2016, Issue 1, 2016., 2016
Remote control boats equipped with an Acoustic Doppler Current Profiler (ADCP) are widely accepted and have been welcomed by many hydrologists for water discharge, velocity profile, and bathymetry measurements. The advantages of this technique include high productivity, fast measurements, operator safety, and high accuracy.
Jongkook Lee   +4 more
wiley   +1 more source

Partial Niche Partitioning in Three Sympatric Gull Species Through Foraging Areas and Habitat Selection

open access: yesEcology and Evolution, Volume 15, Issue 7, July 2025.
Our study analysed GPS data from three sympatric, generalist gull species in the Firth of Forth, Scotland, to investigate niche partitioning, focusing on spatial distributions and resource use, including population‐ and individual‐level habitat preferences.
Nina J. O'Hanlon   +11 more
wiley   +1 more source

Active Disturbance Rejection with Sliding Mode Control Based Course and Path Following for Underactuated Ships

open access: yesMathematical Problems in Engineering, Volume 2013, Issue 1, 2013., 2013
The compound control of active‐disturbance‐rejection control (ADRC) with sliding mode is proposed to improve the performance of the closed‐loop system and deal with the constraint condition problem of a surface ship. The advantages of ADRC with sliding mode were verified by ship course control simulations. Meanwhile, to solve the path‐following problem
Ronghui Li   +5 more
wiley   +1 more source

Passerine stopover physiology: weather variability does not alter corticosterone dynamics after sea crossing

open access: yesJournal of Avian Biology, Volume 2025, Issue 4, July 2025.
Migration is an energy‐intensive phase of birds' life cycle, often including the crossing of large ecological barriers during non‐stop flights. Corticosterone (CORT), an adrenocortical hormone also known as the stress hormone, generally rises at the onset of migration to facilitate and sustain high‐energy metabolism.
Erica Calabretta   +4 more
wiley   +1 more source

Australian Ocean surface waves dataset from SAR

open access: yesGeoscience Data Journal, Volume 11, Issue 4, Page 638-654, October 2024.
In this article, a first regional Synthetic Aperture Radar (SAR) ocean surface waves dataset, containing directional ocean swell spectra measurements from Europe's Sentinel‐1 A and B satellites, is described. The goal is to support marine scientific and industrial research in Australia.
S. Khan   +3 more
wiley   +1 more source

Titanium cholla : lightweight, high-strength structures for aerospace applications. [PDF]

open access: yes, 2007
Aerospace designers seek lightweight, high-strength structures to lower launch weight while creating structures that are capable of withstanding launch loadings.
Atwood, Clinton J.   +5 more
core   +1 more source

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