Results 71 to 80 of about 81,565 (312)

Astrogeologic studies Annual progress report, 1 Oct. 1968 - 30 Sep. 1969 [PDF]

open access: yes
Geologic mapping, engineering, and physics of moon including studies of craters, and impact ...

core   +1 more source

Colorado Geological Survey [PDF]

open access: yes
The Colorado Geological Survey (CGS) is an agency of state government within the Department of Natural Resources whose mission is to help reduce the impact of geologic hazards on the citizens of Colorado, to promote the responsible economic development ...

core   +2 more sources

Sub‐Micrometer‐Precision Path Following of Piezo‐Actuated Mobile Robot

open access: yesAdvanced Intelligent Systems, EarlyView.
This article reports on the Holonomic‐Beetle (HB), a palm‐sized robot that achieves sub‐micrometer (sub‐µm) precision path tracking across spatial ranges from 100 µm to 10 mm. Using proportional‐integral‐derivative (PID) control, the HB accurately tracks both complex and straight paths with sub‐µm path errors, surpassing existing robots.
Eiji Kusui   +9 more
wiley   +1 more source

The geologic mapping of Venus using C-1 format: Sheets 75N254, 60N263 [PDF]

open access: yes
The results of geologic mapping of Venus, produced on the base of Magellan images, are presented. We submit two C-1 format geologic maps with the appropriate legend.
Shalimov, I. V.
core   +1 more source

Characterization and Modeling of Industrial Phosphoric Acids' Rheological Behavior: Impact of Magnesium Monoxide on Viscosity

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study investigates the rheological behavior of industrial phosphoric acids (H3PO4) produced at the JORF–LASFAR phosphoric plant in Morocco, with P2O5 concentrations of 18%, 29%, 42%, and 54%. Rheological measurements were performed using a rotary cylinder rheometer over a shear rate range of 1–1000 s−1.
Hamza Belbsir   +6 more
wiley   +1 more source

Preliminary geologic mapping of Arsia Mons, Mars [PDF]

open access: yes
Geologic mapping of the Tharsis Montes at a scale of 1:500,000 was recently initiated as part of the Mars Geologic Mapping Program of NASA. Detailed mapping of the three large shield volcanoes and their surroundings will help to clarify the sequence of ...
Zimbelman, James R.
core   +1 more source

Automated Global Feature Analyzer - A Driver for Tier-Scalable Reconnaissance [PDF]

open access: yes, 2008
For the purposes of space flight, reconnaissance field geologists have trained to become astronauts. However, the initial forays to Mars and other planetary bodies have been done by purely robotic craft.
Baker, Victor R.   +8 more
core   +1 more source

Semi‐automated assessment for NatureServe subnational conservation status ranks for state floras

open access: yesApplications in Plant Sciences, EarlyView.
Abstract Premise Conservation status ranks measure the potential risk of extinction for species at global, national, and subnational levels, taking into account rarity, threats, and trends. These assessments are largely incomplete due to funding and resource limitations.
Julia H. Prins, Joey Shaw
wiley   +1 more source

Geology and structure of the Tastiota-Himalaya region, eastern margin of the Gulf of California rift, coastal Sonora, Mexico

open access: yesJournal of Maps
This work reports a new 1:50,000-scale geologic map of a portion of the Gulf of California rift along the central Sonoran coast in northwestern Mexico.
Alexis Del Pilar-Martínez   +1 more
doaj   +1 more source

Geologic mapping of MTM quads 40292 and 40297: In the Utopian lowlands north of the Nilosyrtis Mensae, Mars [PDF]

open access: yes
Geologic mapping at 1:500,000 scale of the Mars transverse Mercator (MTM) quads 40292 and 40297 is being conducted under the auspices of the Mars Geologic Mapping Program.
Williams, Steven H., Zimbelman, James R.
core   +1 more source

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