Results 31 to 40 of about 544,725 (129)

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

Ecology 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, Johan Bäckman, Johanna Grönroos, Patrik Olofsson, Roine Strandberg   +4 more
wiley   +1 more source

Finally, results from Gravity Probe-B

, 2011
Nearly fifty years after its inception, the Gravity Probe B satellite mission delivers the first measurements of how a spinning gyroscope precesses in the gravitational warping of spacetime.Comment: A Viewpoint article, published in Physics 4, 43 (2011),
C. M. Will, C. M. Will, Clifford Will, I. Ciufolini   +3 more
core   +1 more source

healpy: equal area pixelization and spherical harmonics transforms for data on the sphere in Python

Journal of Open Source Software, 2019
1 San Diego Supercomputer Center, University of California, San Diego, USA 2 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA 3 Max-Planck-Institute for Astrophysics, Garching, Germany 4 Institut d’Astrophysique de
A. Zonca, L. Singer, D. Lenz, M. Reinecke, C. Rosset, E. Hivon, K. Gorski   +6 more
semanticscholar   +1 more source

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

Journal 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, Huiqing Xu, Yixing Guo, Bin Hu, Yi Yao, Juan C. Cano   +5 more
wiley   +1 more source

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

Advances 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, Hongjoon Shin, Jeonghwan Ahn, Changsam Jeong, Huan Wu   +4 more
wiley   +1 more source

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

Ecology 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, Gary D. Clewley, Daniel T. Johnston, Chris B. Thaxter, Samuel Langlois Lopez, Lucy R. Quinn, Philipp H. Boersch‐Supan, Elizabeth A. Masden, Francis Daunt, Jared Wilson, Niall H. K. Burton, Elizabeth M. Humphreys   +11 more
wiley   +1 more source

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

Mathematical 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, Tieshan Li, Renxiang Bu, Qinling Zheng, C. L. Philip Chen, Zhiguang Feng   +5 more
wiley   +1 more source

Spherical Kernel for Efficient Graph Convolution on 3D Point Clouds [PDF]

IEEE Transactions on Pattern Analysis and Machine Intelligence, 2019
We propose a spherical kernel for efficient graph convolution of 3D point clouds. Our metric-based kernels systematically quantize the local 3D space to identify distinctive geometric relationships in the data.
Huan Lei, Naveed Akhtar, Ajmal Saeed Mian   +2 more
semanticscholar   +1 more source

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

Journal 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, Virginie Canoine, Massimiliano Cardinale, Ivan Maggini, Leonida Fusani   +4 more
wiley   +1 more source

Australian Ocean surface waves dataset from SAR

Geoscience 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, M. Hemer, E. Echevarria, E. King   +3 more
wiley   +1 more source