Special features of plant feeding under conditions of aeroponic cultivation for a closed system
Plant feeding by air culture method for closed system
PLANT /BIOL/↗
SEARCH · Engineering Papers
Results for “close”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Saturation behavior of a Doppler broadened transition involving levels with closely spaced structure
Saturation behavior of Doppler broadened transition involving levels with closely spaced structure
DOPPLER EFFECT↗
Application of approach speed criteria derived from closed-loop pilot-vehicle systems analyses to an Ogee wing aircraft
Approach speed criteria derived from closed loop pilot-vehicle systems analyses and applied to Ogee wing F-5 aircraft
OGEE WING↗
Application of gas bearings to closed-system Brayton-cycle turbomachinery - Recent accomplishments and potential problem areas.
Gas lubricated bearings used in Brayton cycle closed-loop system turbomachinery in design of two-shaft power plant
TURBOMACHINE↗
Closed loop ''optimal'' guidance equations for soft landing
Closed loop optimal guidance equations for soft landing
SOFT LANDING↗
Application of gas bearings to closed-system Brayton-cycle turbomachinery - Recent accomplishments and potential problem areas.
Gas lubricated bearings used in Brayton cycle closed loop system turbomachinery in design of two-shaft power plant
POWER PLANT↗
A closed-loop, approximately time-optimal control method for linear systems.
Eigenvector scalar product solutions for closed loop time optimal control of linear systems
LINEAR SYSTEM↗
Microbial interactions of men and their environment inside a closed system.
Microbial interaction in closed system by simulating space flight conditions, noting degree of crowding effect on buildup
SPACE SIMULATION↗
Microbial colonization of a closed growth chamber during hydroponic cultivation of lettuce
The goal of this study was to characterize sessile and planktonic microbiota that developed during two successive hydroponic cultures of lettuce in a closed chamber system. Coupons of polyvinyl chloride (PVC) placed in the nutrient solution lines were removed periodically, as were samples of the nutrient solutions and condensate from the air-handling system. The bacteria and fungi present on the coupons and in fluid samples were enumerated by direct plate counts. Disinfecting the hydroponic system with 0.1% hypochlorite and 0.1 N nitric acid reduced the bacterial densities in biofilm samples from 1 x 10 7 CFU/10 cm 2 to 1 x 10 1 CFU/10 cm 2 and eliminated culturable fungi; Staphylococcus sp., Pseudomonas sp., and Micrococcus sp. survived this procedure. Bacterial and fungal concentrations in all samples returned to predisinfection levels after 2 days of plant growth. Pseudomonas and Acremonium predominated both before and after disinfection. Fungal concentrations never exceeded 7 x 10 2 CFU/10 cm 2 . The coupon microbiota differed from that of the rhizoplane at harvest. Overall, the greatest numbers of species were found on the rhizoplane samples collected during the second crop. The microbial community changed little during individual crops or between successive crops. Diversity indices remained relatively constant for all samples.
Bacteria growth & development↗
JWST Cryo Fine Guidance Closed Loop Test Results
The James Webb Space Telescope uses the Fine Guidance Controller to achieve pointing accuracy to a millionth of a degree needed for its scientific observations. This closed loop controller includes the Fine Guidance Sensor instrument, the Attitude Control System, and the Fine Steering Mirror, all working together to generate precise attitude updates every 64 ms to stabilize and point the Observatory. It was exercised for the first time with the flight hardware during the cryogenic test at Johnson Space Center. We provide a top level summary of the test, the results, and its performance in preparation for on-orbit operations.
Line of Sight↗
Closed Loop Carrier Phase Synchronization Techniques Motivated by Likelihood Functions
This paper reexamines the notion of closed loop carrier phase synchronization motivated by the theory of maximum a posterior (MAP) phase estimation with emphasis on the development of new structures based on both maximum likelihood (ML) and average-likelihood (AL) functions.
Closed↗
RADIATION TRANSFER BY CLOSELY SPACED SHIELDS.
Radiation transfer by closely spaced shields
RADIATION TRANSFER↗
STABILITY OF A CLOSED INVARIANT SET AND ITS NEARBY LYING INVARIANT SETS
Stability of a closed invariant set
STABILITY↗
Method of welding joint in closed vessel improves quality of seam
To facilitate welding of closed vessels, a metal backup strip is used at the junction inside the vessel. After welding from the outside, this strip is dissolved by a chemically reactive solvent poured through a filler hole into the vessel.
Freeman, R.↗
DEVELOPMENT OF THE LUNAR AND SOLAR DISTURBING FUNCTIONS FOR A CLOSE SATELLITE
Development of lunar and solar disturbing functions for a close satellite
ORBIT PERTURBATION↗
A CONTRIBUTION TO THE THEORY OF CRITICAL INCLINATION OF CLOSE EARTH SATELLITES
Theory of critical inclination of close earth satellite
CRITICAL INCLINATION THEORY↗
Metal-bending brake facilitates lightweight, close-tolerance fabrication
A lightweight, metal bending brake ensures very accurate bends. Features of the brake that adapt it for making complex reverse bends to close tolerances are a pronounced relief or cutaway of the underside of the bodyplate combined with modification in the leaf design and its suspension.
Ercoline, A. L.↗
Contribution to the theory of critical inclination of close earth satellites. 2. case of asymmetrical potential
Critical inclination of close earth satellites for case of asymmetrical potential of main body and small eccentricity - peculiar libration
LIBRATION↗