Results 31 to 40 of about 1,146 (137)
Simulating the (99942) Apophis Earth Flyby Using a Contact Binary Model
The Planetary Science JournalThis paper investigates the mass shifts of asteroid (99942) Apophis during its 2029 close encounter with Earth, using the contact dynamics method, a type of discrete element method. Unlike previous analyses, we model the asteroid as a contact binary body
Hai-Shuo Wang +2 more
doaj +1 more source
Ichnology of the Rhätsandstein in the Exter Formation (Triassic), Germany
Geological Journal, EarlyView.Trace fossils from the Rhätsandstein of southern Germany record repeated colonization of high‐energy shallow‐marine substrates before the Triassic–Jurassic transition. The assemblage reflects environmental and preservational controls on ichnodiversity.
Daniel Sedorko, James H. Nebelsick
wiley +1 more source
Search for Near-Earth Asteroid Pair Candidates Based on Orbital Evolution Analysis
The Astrophysical JournalAsteroid pairs refer to pairs of bodies that exhibit a high degree of similarity in orbital element space but are not gravitationally bound dynamically.
Ning Liu +5 more
doaj +1 more source
Must Longtermists Wish Us All Dead? A Quadrilemma
Journal of Applied Philosophy, EarlyView.ABSTRACT Longtermists assign great moral importance to making the long‐term future as good as possible, especially by ensuring the survival of humanity. We argue, to the contrary, that on assumptions that are plausible, conservative, or shared by leading longtermists, human extinction will likely augment total utility among human and non‐human animals ...
Nir Eyal, Bastian Steuwer, Shai Meiri
wiley +1 more source
The Dynamical State of the Didymos System before and after the DART Impact
The Planetary Science JournalNASA’s Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the natural satellite of (65803) Didymos, on 2022 September 26, as a first successful test of kinetic impactor technology for deflecting a potentially hazardous object in space.
Derek C. Richardson +52 more
doaj +1 more source
Method‐dependent differences in zooplankton abundance and size metrics: Microscopy vs. ZooScan
Limnology and Oceanography: Methods, EarlyView.Abstract Image‐based approaches such as ZooScan are increasingly used for high‐throughput zooplankton monitoring. However, quantitative evaluations of methodological differences relative to conventional microscopy remain limited. In this study, zooplankton abundance and size‐based metrics obtained from microscopy and ZooScan image analysis were ...
Young Seok Jeong +4 more
wiley +1 more source
The Planetary Science JournalSmall solar system bodies subjected to planetary tides may be resurfaced, distorted, reshaped, split into binary or higher-multiple systems, or fragmented entirely. We investigate the effects of particle shape on numerical models of tidal deformation and
Julian C. Marohnic +3 more
doaj +1 more source
Biomimetic robots driven by smart materials: Motion forms, stimulation methods and applications
Responsive Materials, EarlyView.Biomimetic robots enhance adaptability by mimicking biological systems, but rigid materials limit performance. Smart materials with stimuli responsiveness and shape adaptability enable more flexible actuation and improved environmental interaction.
Zeyu Yang +8 more
wiley +1 more source
Large‐Scale Applications of Plasma Technologies: Progresses and Challenges
High Voltage, EarlyView.ABSTRACT Plasma technologies convert electrical power into energetic electrons, ions, reactive species, radiation and heat, thereby breaking through the bottleneck of purely thermal or chemical routes and bringing impressive changes to our world. This roadmap reviews the progress and challenges of plasma technologies from a large‐scale and application ...
Pankaj Attri +51 more
wiley +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Regolith samples from the carbonaceous asteroid Bennu were stowed and delivered to Earth in the OSIRIS‐REx spacecraft's Sample Return Capsule (SRC). We applied multiple analytical techniques to study the components of the post‐flight SRC, with a focus on assessing the conditions and any contaminants to which the Bennu samples were exposed ...
Scott A. Sandford +35 more
wiley +1 more source