Results 121 to 130 of about 13,652 (300)

Primary and secondary metallic PFC damage induced by runaway electron dissipation in FTU

open access: yesNuclear Materials and Energy
Runaway electron (RE) interaction with plasma-facing components (PFCs) has been documented to lead to deep volumetric melting and thermal shock driven material explosions followed by extensive wall cratering.
M. De Angeli   +7 more
doaj   +1 more source

Impact cratering and the surface age of Venus: The Pre-Magellan controversy [PDF]

open access: yes
The average surface age of a planet is a major indicator of the level of its geologic activity and thus of the dynamics of its interior. Radar images obtained by Venera 15/16 from the northern quarter of the Venus (lat 30 to 90 degs) reveal about 150 ...
Kozak, Richard C.   +3 more
core   +1 more source

Terrain Synthesis and Authoring based on Iso‐Contours

open access: yesComputer Graphics Forum, EarlyView.
Abstract Digital terrains are central to realistic landscape depiction, yet authoring tools must balance perceptual realism with intuitive artistic control. We propose a compact vector‐based representation that models terrain as nested iso‐contours, inspired by geomorphology and cartography.
B. Huftier   +5 more
wiley   +1 more source

Study on the high-speed penetration resistance of honeycomb tube surface constrained concrete

open access: yesBaozha yu Chongji
To investigate the penetration resistance of metal honeycomb tube-confined concrete structures under hypervelocity impact, penetration experiments were conducted using a two-stage light gas gun with projectile velocities near 1500 m/s. The material point
Xiaochen LI   +6 more
doaj   +1 more source

Absolute ages from crater statistics: Using radiometric ages of Martian samples for determining the Martian cratering chronology [PDF]

open access: yes
In the absence of dates derived from rock samples, impact crater frequencies are commonly used to date Martian surface units. All models for absolute dating rely on the lunar cratering chronology and on the validity of its extrapolation to Martian ...
Neukum, G.
core   +1 more source

Using incentive payments to promote human–carnivore coexistence

open access: yesConservation Biology, EarlyView.
Abstract For many large carnivores, minimizing the financial burden they impose on local people is critical to their conservation. Incentive‐based programs that provide people with financial benefits for taking pro‐conservation actions or achieving conservation goals are a promising tool for promoting human–carnivore coexistence. Although the number of
Adam Pekor   +9 more
wiley   +1 more source

A Flat-bottomed Buried Crater and Paleo-layered Structures Revealed at the Von Kármán Crater Using Lunar Penetrating Radar

open access: yesThe Astrophysical Journal Letters
Impact cratering is the most common geological process occurring on terrestrial planets. The morphologies of impact craters reflect not only the impact conditions but the target properties as well.
Ling Zhang   +7 more
doaj   +1 more source

Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature

open access: yesNuclear Materials and Energy
Runaway electron incidence on plasma facing components triggers explosive events that are accompanied by the expulsion of fast solid debris. Subsequent dust-wall high speed impacts constitute a mechanism of wall damage and dust destruction.
Marco De Angeli   +9 more
doaj   +1 more source

The role of impact cratering for Mars sample return [PDF]

open access: yes
The preserved cratering record of Mars indicates that impacts play an important role in deciphering Martian geologic history, whether as a mechanism to modify the lithosphere and atmosphere or as a tool to sample the planet.
Schultz, P. H.
core   +1 more source

Model predictive control for current balancing in a four-phase buck converter [PDF]

open access: yes, 2016
Multiphase buck topology offers smaller ripple current and lower component ratings. This, however, compromises unbalanced output current between each phase of an inductor which leads to over-current and inductor saturation issues.
A. F. Yahaya, Jabbar, Mansor, Muhamad
core  

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