Results 51 to 60 of about 21,945 (225)

Spectral Characterization of the Life Stages and Physiological Responses of Diatraea saccharalis Fabricius (Lepidoptera: Crambidae) Larvae Parasitized by Cotesia flavipes Cameron (Hymenoptera: Braconidae)

open access: yesEntomologia Experimentalis et Applicata, EarlyView.
Hyperspectral proximal sensing was used to characterize the life stages and physiological responses of Diatraea saccharalis and to detect parasitism by Cotesia flavipes. Distinct spectral signatures differentiated eggs, larval instars, pupae, and adults, as well as live, dead, and parasitized larvae.
Souradji I. Bachirou   +3 more
wiley   +1 more source

Microspherules Formed by Lightning Strikes

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

New Insights into Lava Tube Formation: An Asymmetrical and Deep Case Observed by Yutu-2 Radar at Lunar Farside

open access: yesThe Astrophysical Journal
This article reports a potential lava tube observed at ∼130 m depth of the lunar farside by Lunar Penetrating Radar data. However, a possible scenario with a kind of dry and low-density materials connected with a basaltic boulder or lava flow cannot be ...
Haoqiu Zhou   +6 more
doaj   +1 more source

Point Cloud Registration for Lava Tube Surface Reconstruction Using Curvature-Optimized Projection

open access: yesIEEE Access
The surface reconstruction of point clouds is a key technology in lunar exploration. The generation of high-precision three-dimensional models of lunar lava tubes via surface reconstruction provides technical support for subsequent exploration.
Jiaqi Yao   +7 more
doaj   +1 more source

Method for Identifying Lava Tubes Among Pit Craters Using Brightness Profile Across Pits on the Moon or Mars [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2016
Caves can serve as major outposts for future human exploration of the Moon and Mars. In addition, caves can protect people and electronic equipment from external hazards such as cosmic ray radiation and meteorites impacts and serve as a shelter ...
Jongil Jung   +3 more
doaj   +1 more source

Geologic Mapping of the Olympus Mons Volcano, Mars [PDF]

open access: yes, 2012
We are in the third year of a three-year Mars Data Analysis Program project to map the morphology of the Olympus Mons volcano, Mars, using ArcGIS by ESRI. The final product of this project is to be a 1:1,000,000-scale geologic map.
Bleacher, J. E.   +3 more
core   +1 more source

The airborne lava-seawater interaction plume at Kilauea Volcano, Hawaii [PDF]

open access: yes
Petrology igneous metamorphic and volcanic studies ...
Edmonds, M., Gerlach, T. M.
core   +1 more source

Mars Image Analysis [PDF]

open access: yes, 2004
This lesson plan details an activity designed to put students in the role of scientists in analyzing the geological processes that occur on terrestrial planets - i.e. Earth and Mars.

core   +1 more source

High‐Resolution Morphology of Lunar Lava Tube Pits Using Photogrammetric Modeling of Multiple Stereo Images

open access: yesEarth and Space Science
Underground lava tubes are promising candidates for the construction of lunar bases because they are believed to offer good protection against radiation and harsh thermal environments on the lunar surface.
Miyu Zhou   +7 more
doaj   +1 more source

Arc/gas electrode [PDF]

open access: yes, 1992
A gas/arc electrode is disclosed for use under vacuum conditions where a first housing encloses a second housing, with an end of the second housing extending through an opening in the first housing and having an outlet orifice.
Poorman, Richard M., Weeks, Jack L.
core   +1 more source

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