Results 101 to 110 of about 1,547,748 (299)

Effects of Huge Earthquakes on Earth Rotation and the length of Day

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2013
We calculated the co-seismic Earth rotation changes for several typical great earthquakes since 1960 based on Dahlen¡¦s analytical expression of Earth inertia moment change, the excitation functions of polar motion and, variation in the length of a day ...
Changyi Xu, Wenke Sun, Xin Zhou
doaj   +1 more source

White Matter and Perivascular Imaging Changes in Alzheimer's Disease and Cerebral Amyloid Angiopathy

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Peak‐width of skeletonized mean diffusivity (PSMD) and diffusion tensor imaging–analysis along the perivascular space (DTI‐ALPS), reflecting white matter integrity and glymphatic function, are altered in Alzheimer's disease (AD).
Debina Laishram   +3 more
wiley   +1 more source

A Recursive Fuzzy System for Efficient Digital Image Stabilization

open access: yesAdvances in Fuzzy Systems, 2008
A novel digital image stabilization technique is proposed in this paper. It is based on a fuzzy Kalman compensation of the global motion vector (GMV), which is estimated in the log-polar plane.
Nikolaos Kyriakoulis   +1 more
doaj   +1 more source

Aerial strip surveys of polar bears in the Barents Sea

open access: yes, 1990
Aerial strip surveys of polar bears in the Barents Sea were performed by helicopter in winter 1987. The number of bears within 100 m on each side of the helicopter was counted. A total of 263.6 km2 was surveyed and 21 bears were counted.
Wiig, Øystein, Bakken, Vidar
core   +1 more source

dynoGP: Deep Gaussian Processes for Dynamic System Identification

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces a novel class of deep models for system identification, dynamical deep Gaussian processes, which combine the strengths of data‐driven methods, such as those based on neural network architectures, with the ability to output a probability distribution for uncertainty representation.
Alessio Benavoli   +3 more
wiley   +1 more source

Research on Polar Motion Prediction Based on Radial Basis Function Neural Network Interpolation

open access: yesEarth and Space Science
Accurate prediction of polar motion are crucial for various scientific fields, including astronomy, geoscience, and oceanography. The temporal resolution of the modeling data currently utilized in polar motion prediction research is 1 day.
Fei Wu   +3 more
doaj   +1 more source

Efficient Time-Domain Imaging Processing for One-Stationary Bistatic Forward-Looking SAR Including Motion Errors

open access: yesSensors, 2016
With the rapid development of the one-stationary bistatic forward-looking synthetic aperture radar (OS-BFSAR) technology, the huge amount of the remote sensing data presents challenges for real-time imaging processing.
Hongtu Xie   +5 more
doaj   +1 more source

Revisiting perceptions and evolving culture: a community dialogue on women in polar research

open access: yes, 2018
Women have made outstanding contributions to polar research in recent decades, though full engagement may be hindered by persistent inequities, including notably the prevalence of workplace harassment.
Seag, M.   +3 more
core  

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

open access: yesAdvanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar   +2 more
wiley   +1 more source

Polar Research evolves, and Norway and the IPY

open access: yes, 2007
March marks the start of the International Polar Year (IPY) and I am very pleased to announce on this occasion that we’ve joined hands with Blackwell Publishing, which will henceforth publish the journal while editorial control remains with the editorial
Goldman, Helle V.
core   +1 more source

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