Results 111 to 120 of about 8,678 (302)

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

The Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

Shallow recurrent decoder for reduced order modeling of E × B plasma dynamics

Machine Learning: Science and Technology
Reduced-order models (ROMs) are becoming increasingly important for rendering complex and multiscale spatiotemporal dynamics computationally tractable. Computationally efficient ROMs are especially essential for optimized design of technologies as well ...
Farbod Faraji, Maryam Reza, J Nathan Kutz   +2 more
doaj   +1 more source

Thirty percent conversion efficiency from radiofrequency power to thrust energy in a magnetic nozzle plasma thruster. [PDF]

Sci Rep, 2022
Takahashi K.
europepmc   +1 more source

Hybrid-PIC Computer Simulation of the Plasma and Erosion Processes in Hall Thrusters [PDF]

HPHall software simulates and tracks the time-dependent evolution of the plasma and erosion processes in the discharge chamber and near-field plume of Hall thrusters.
Gamero-Castano, Manuel, Hofer, Richard R., Katz, Ira, Mikellides, Ioannis G.   +3 more
core   +1 more source

Challenges and Opportunities in Multi‐Method Integrated Geophysical Prospection of Buried Building Remains at the Sanctuary of Olympia

Archaeological Prospection, EarlyView.
ABSTRACT Ancient Olympia was one of the most important sanctuaries and the venue for the Olympic Games in Greek and Roman times. Its remains are located in the Olympia Terrace (Peloponnese, Greece) at the present‐day confluence of the rivers Alpheios and Kladeos at the base of Mount Kronos.
Sarah Bäumler, Dennis Wilken, Peter Fischer, Lena Slabon, Timo Willershäuser, Birgitta Eder, Hans‐Joachim Gehrke, Erofili‐Iris Kolia, Franziska Lang, Oliver Pilz, Andreas Vött   +10 more
wiley   +1 more source

Study on inversion method of wall erosion information of on-orbit Hall thruster based on low-frequency oscillation signals and neural networks. [PDF]

Heliyon, 2022
Han K, Xie F, Wang Y, Zhang L, Yu M, Wang J, Wang Y, Wan J.   +7 more
europepmc   +1 more source

MPD thruster research issues, activities, strategies [PDF]

The following activities and plans in the MPD thruster development are summarized: (1) experimental and theoretical research (magnetic nozzles at present and high power levels, MPD thrusters with applied fields extending into the thrust chamber, and ...

core   +1 more source

Learning to ‘be’ an activist: Exploring the relationship between activism and informal education in a youth activism group case study

British Educational Research Journal, EarlyView.
Abstract Young people in the United States (and beyond) access spaces for activism in varied ways, including the out‐of‐school time sector, where youth activism (YA) groups draw on informal learning pedagogies to engage young people in collective action.
Laura Weiner
wiley   +1 more source

Demonstration of electric micropropulsion multimodality. [PDF]

Sci Adv, 2022
Zolotukhin DB, Bandaru SRP, Daniels KP, Beilis II, Keidar M.   +4 more
europepmc   +1 more source

Hall Thruster Erosion [PDF]

, 2019
Vitalievich, Loyan, Andrey, Nikolaevna, Khaustova, Alona   +1 more
openaire   +2 more sources