Results 41 to 50 of about 2,043 (261)

Beyond Directions: Symmetry‐Aware Rotation Sets for Triaxial Diffusion Encoding by Geometric Filter Optimization

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To improve the accuracy of diffusion‐weighted powder average signals for diffusion encoding with arbitrary b‐tensors. Methods We identify an intrinsic dihedral (D2$$ {D}_2 $$) symmetry of diffusion signals for arbitrary diffusion encoding, which defines their natural signal space (a quotient of 3D rotations).
Sune Nørhøj Jespersen, Filip Szczepankiewicz   +1 more
wiley   +1 more source

Seafloor crustal deformation data along the subduction zones around Japan obtained by GNSS-A observations

Scientific Data, 2018
Crustal deformation data obtained by geodetic observation networks are foundations in the fields of geodesy and seismology. These data are essential for understanding plate motion and earthquake sources and for simulating earthquake and tsunami scenarios.
Yusuke Yokota, Tadashi Ishikawa, Shun-ichi Watanabe   +2 more
doaj   +1 more source

Main‐chain polyfullerenes: Taking fullerene to the next dimension

Polymer International, EarlyView.
This short review appraises main‐chain polyfullerenes. Their slow development over 30 years has suddenly boomed with a rapid growth due to exciting developments in solar energy. Abstract This mini‐review gives an overview of the development, chemistry, properties and applications of main‐chain polyfullerenes.
Marco Antônio GB Gomes, Orisson Ponce Gomes, Patricia Targon Campana, Didier Bégué, Roger C Hiorns   +4 more
wiley   +1 more source

Quantifying the Surface Deformation of Pingos on the Alaskan North Slope Using Interferometric Synthetic Aperture Radar (InSAR)

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Pingos are large mounds with cores formed of intrusive ice that form in periglacial landscapes. These ice structures can form in regions of discontinuous permafrost, commonly as hydraulic or open‐system pingos, or in locations of continuous permafrost, commonly as hydrostatic or closed‐system pingos.
Venezia M. Follingstad, Roger J. Michaelides, Matthew R. Siegfried, Tyler M. Meng, John Bradford, Kynan H. G. Hughson, Alexia R. Kubas, Andrew Mullen, Enrica Quartini, Austin Routt, Hanna G. Sizemore, Andrei Swidinsky, Britney E. Schmidt   +12 more
wiley   +1 more source

Comparison and Accuracy Estimation of Modern Models of the Earth’s Gravitational Potential [PDF]

Учёные записки Казанского университета: Серия Естественные науки, 2016
The paper presents a brief overview of new models of the Earth’s gravitational potential constructed based on satellite-to-satellite tracking, satellite gradiometry, satellite altimetry, as well as ground gravimetric and satellite laser ranging. Inherent
I.O. Novlyanskaya
doaj  

Satellite geodesy: Interpretation

Eos, Transactions American Geophysical Union, 1971
This report outlines the activity during the past 4 years in the area of interpreting geodetic data derived through procedures of satellite geodesy. No attempt has been made to synthesize the ideas of the various investigators; the report simply points out where the activity lies and briefly what it is.The procedures of dynamic satellite geodesy ...
openaire   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Participation of Employees and Students of the Faculty of Geodesy and Cartography in Polar Research

Reports on Geodesy and Geoinformatics, 2016
This year the Faculty of Geodesy and Cartography, Warsaw University of Technology celebrates its 95th jubilee, which provides an opportunity to present the Faculty’s rich traditions in polar research.
Pasik Mariusz, Adamek Artur, Rajner Marcin, Kurczyński Zdzisław, Pachuta Andrzej, Woźniak Marek, Bylina Paweł, Próchniewicz Dominik   +7 more
doaj   +1 more source

Climate Crisis, Human Mobility and Security Challenges in the MENA Region: Implications for Sustainable Development and Regional Stability

Sustainable Development, EarlyView.
ABSTRACT This study examines the interplay between climate change, violent conflict and forced migration in the Middle East and North Africa (MENA), focusing on asylum flows to the European Union (EU). By integrating high‐resolution climate, conflict and socioeconomic data spanning 2000 to 2023, we develop a comprehensive empirical framework to ...
Shifa Mathbout, George Boustras, Pierantonios Papazoglou, Javier Martin‐Vide, Joan A. Lopez‐Bustins   +4 more
wiley   +1 more source

Satellite geodesy on the lawn

Eos, Transactions American Geophysical Union, 1987
During the 1986 AGU Fall Meeting in December, four Global Positioning System (GPS) receivers were demonstrated in a simulated field condition. Although billed as a “shootout,” constraints of time and location dictated that this demonstration would not be a valid test of the receivers, and in retrospect, it should not be viewed as such.
openaire   +1 more source