Results 131 to 140 of about 46,669 (261)

Leveraging Multimodal Large Language Models to Analyse Student Exploration Behaviours in Educational Game Environments

open access: yesJournal of Computer Assisted Learning, Volume 42, Issue 4, August 2026.
ABSTRACT Background Video data provides rich opportunities to examine student behaviour in game‐based learning environments, capturing not only observable actions but also subtle indicators of cognitive engagement. However, traditional video analysis is labor‐intensive, and current applications of AI to this task are limited by models trained on ...
Yiqiu Zhou   +7 more
wiley   +1 more source

Massive Rocky Planets May Suppress Deep Melting

open access: yesAGU Advances, Volume 7, Issue 4, August 2026.
Abstract Melting properties of silicates are critical to understanding the thermal evolution of rocky planetary interiors. In the deep mantles of massive rocky planets, post‐post‐spinel Mg2SiO4 ${\text{Mg}}_{2}{\text{SiO}}_{4}$ is potentially one of the most abundant mineral phases, yet its melting behavior remains unconstrained. Here, we determine the
Donghao Zheng, Yihang Peng, Jie Deng
wiley   +1 more source

Transit timing analysis of the exoplanet TrES-5 b. Possible existence of the exoplanet TrES-5 c [PDF]

open access: yes, 2018
In this work, we present transit timing variations detected for the exoplanet TrES-5b. To obtain the necessary amount of photometric data for this exoplanet, we have organized an international campaign to search for exoplanets based on the Transit Timing
Vladimir V Dyachenko   +55 more
core   +1 more source

DYNAMIC EVOLUTION EXOPLANET SYSTEMS, MOVING IN ORBITAL RESONANCES WITH THE ACCOUNT OF SECULAR PERTURBATION FROM N BODIES

open access: yesOdessa Astronomical Publications, 2017
Equations of exoplanet's motion connected with orbital Lindblad resonances with the account of secular terms caused by gravitational non-resonant perturbation are derived. Qualitative researches of orbital evolution modeling exoplanet systems are carried
B. R. Mushailov, A. K. Chuyas
doaj   +1 more source

The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey [PDF]

open access: yes, 2017
We describe a 20 year survey carried out by the Lick-Carnegie Exoplanet Survey Team (LCES), using precision radial velocities from HIRES on the Keck I telescope to find and characterize extrasolar planetary systems orbiting nearby F, G, K, and M dwarf ...
R. P. Butler   +10 more
semanticscholar   +1 more source

A Theory for the Global Wind Energy Dissipation Across Climates

open access: yesAGU Advances, Volume 7, Issue 5, August 2026.
Abstract Atmospheric winds play a key role in shaping climate, ecosystems, and infrastructure. The energy that drives the winds is generated by the atmospheric heat engine. However, traditional entropy‐budget descriptions of this heat engine rely on poorly constrained microscale processes, limiting their predictive power.
Malte F. Jansen   +2 more
wiley   +1 more source

Variability Survey of Southern Open Clusters NGC 6134, NGC 6416, Collinder 394, and Alessi 10

open access: yesJournal of Mathematical and Fundamental Sciences
We present the results of a brightness variability survey of four southern open clusters, namely NGC 6134, NGC 6416, Collinder 394, and Alessi 10, which were observed using three telescopes following a time series photometric scheme during the dry ...
Denny Mandey   +10 more
doaj   +1 more source

Abundances in Stars with Exoplanets [PDF]

open access: yesSymposium - International Astronomical Union, 2004
Extensive spectroscopic studies of stars with and without planets have concluded that stars hosting planets are significantly more metal-rich than those without planets. More subtle trends of different chemical elements begin to appear as the number of detected extrasolar planetary systems continues to grow.
openaire   +2 more sources

Exoplanet Catalogue

open access: yes
An exoplanet is a planet that orbits another star other than the Sun; since 1988, more than 4,300 of them have been confirmed. This catalogue provides a visual way to visualise exoplanets in their solar systems, together with their habitable zones.
Zucconi, Alan
core   +3 more sources

Nitrates as a Potential N Supply for Microbial Ecosystems in a Hyperarid Mars Analog System

open access: yesLife, 2019
Nitrate is common in Mars sediments owing to long-term atmospheric photolysis, oxidation, and potentially, impact shock heating. The Atacama Desert in Chile, which is the driest region on Earth and rich in nitrate deposits, is used as a Mars analog in ...
Jianxun Shen   +3 more
doaj   +1 more source

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