Engineering topics
Wellman, J.
Publications and source records attributed to Wellman, J..
Space environmental diagnostic package
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NMP Space Environmental Monitor (SEM): preliminary design concept
The New Millennium Program is examining the possibility of developing a low-cost space environmental monitor (SEM) for inclusion on its technology validation flights to monitor the space environment.
NMP environmental monitor: preliminary design concept
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A general approach to MEMS performance assurance
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Unreleased polysilicon beam failure. MEMS Reliability Alliance Technical Report 37-01
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Minimum dimension dimple analysis. MEMS Reliability Alliance Technical Report 36-02
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MEMS technology at NASA's Jet Propulsion Laboratory
The MEMS Technology Group is part of the Microdevices Laboratory (MDL) at the Jet Propulsion Laboratory (JPL). The group pursues the development of a wide range of advanced MEMS technologies that are primarily applicable to NASA's robotic as well as manned exploration missions.
Adatom condensation and quantum dot sizes in InGaAs/GaAs (001)
The sizes and concentrations of capped and surface InGaAs/GaAs quantum dots (QDs) grown under the same conditions have been investigated.
Transmission Electron Microscopy Study of InGaAs/GaAs Structural Evolution Near the Stranski-Krastanow Transformation
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Martian Dynamical Phenomena During June-November 1976: Viking Orbiter Imaging Results
A summary is presented of the orbital imaging observations of dynamical phenomena on Mars during the Viking primary mission. Clouds in the Tharsis/Amazonis regions are examined and the observation of an area of unusually high brightness to the southwest of Arsia Mons is considered. Attention is given to clouds and surface frost in the south polar region, the north polar cap, and aspects of dust storm activity.