Engineering topics
Weinstein, S.
Publications and source records attributed to Weinstein, S..
Use of a Novel Rover-mounted Fluorescence Imager and Fluorescent Probes to Detect Biological Material in the Atacama Desert in Daylight
We have developed an imaging system, the Fluorescence Imager (FI), for detecting fluorescence signals from sparse microorganisms and biofilms during autonomous rover exploration. The fluorescence signals arise both from naturally occurring chromophores, such as chlorophyll of cyanobacteria and lichens, and from fluorescent probes applied to soil and rocks. Daylight imaging has been accomplished by a novel use of a high-powered flashlamp synchronized to a CCD camera. The fluorescent probes are cell permanent stains that have extremely low intrinsic fluorescence (quantum yields less than 0.01) and a large fluorescence enhancement (quantum yields greater than 0.4) when bound to the target. Each probe specifically targets either carbohydrates, proteins, nucleic acids or membrane lipids, the four classes of macromolecules found in terrestrial life. The intent of the probes is to interrogate the environment for surface and endolithic life forms.
Rendezvous and Capture of a Martian Soil Sample in Orbit Around Mars
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Mars Sample Return Spacecraft Systems Architecture
The Mars Sample Return mission plans to collect sets of samples from two different sites on Mars and return them to Earth in 2008.
Mars Sample Return Spacecraft Systems Architecture
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A Few Good Rocks: The 2005 Mars Sample Return Mission Architecture
A Mars sample return is the culmination of many years of exciting missions of the Mars Surveyor Program.
A Few Good Rocks: The Mars Sample Return Mission Architecture
A Mars sample return is the culmination of many years of exciting missions of the Mars Surveyor Program.
NASA ISAS Collaboration on the ISAS MUSES C Asteroid Sample Return Mission
NASA and Japan's Institute of Space and Astronautical Science (ISAS) have agreed to cooperate on the first mission to collect samples from the surface of an asteroid and return them to Earth for in-depth study.
Trajectory Design for a Europa Orbitter Mission: A Plethora of Astrodynamic Challenges
The icy moon of Europa is a hot topic in planetary exploration. This paper discusses the trajectory design of a Europa orbiter mission intended to find out if Europa is a possible habitat for extraterrestrial life.
Pluto Mission Development Status
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Pluto Mission Development Status
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Pluto Fast Flyby: An Overview of the Mission and Spacecraft Design, Advanced Technology Insertion Efforts, and Student Involvement Opportunities
In an effort to complete the initial reconnanissance of our solar system, the Jet Propulsion Laboratory (JPL) is designing a mission to send two very small spacecraft to explore Pluto and its moon, Charon.
To Pluto from a First-Class Postage Stamp
It really began in 1900, when Konstantin Tsiolkovsky in Russia published the first scientific paper describing how a multi-stage rocket could achieve the 9 km/sec velocity needed to place an object in orbit around the Earth.
To Pluto from a First-Class Postage Stamp
The first mission to Pluto is presently under development at NASA's Jet Propulsion Laboratory. Inspired by a nagging 29-cent postage stamp, the mission concept began with a chance conversation between two engineers.
JPL transient radiation analysis by computer program (JTRAC)
Digital computer program, JTRAC, simulates time response of electronic circuit to arbitrary forcing functions which may include electrical and/or radiation stimuli. Program is designed to solve linear and nonlinear simultaneous equations which characterize mathematical models used to predict circuit response for electrical and/or radiation input.
Power subsystem performance prediction /PSPP/ computer program.
A computer program which simulates the operation of the Viking Orbiter Power Subsystem has been developed. The program simulates the characteristics and interactions of a solar array, battery, battery charge controls, zener diodes, power conditioning equipment, and the battery spacecraft and zener diode-spacecraft thermal interfaces. This program has been used to examine the operation of the Orbiter power subsystem during critical phases of the Viking mission - from launch, through midcourse maneuvers, Mars orbital insertion, orbital trims, Lander separation, solar occultations and unattended operation - until the end of the mission. A typical computer run for the first 24 hours after launch is presented which shows the variations in solar array, zener diode, battery charger, batteries and user load characteristics during this period.
Bibliography of sensory and perceptual deprivation, isolation, and related areas.
Bibliography of sensory and perceptual deprivation, isolation, and related areas
Hallucinations and disturbances of affect, cognition, and physical state as a function of sensory deprivation.
Hallucinations and disturbances of affect, cognition, and physical state as function of sensory deprivation