Results 61 to 70 of about 17,778 (196)

Bank-to-turn control technology survey for homing missiles [PDF]

open access: yes
The potential advantages of bank-to-turn control are summarized. Recent and current programs actively investigating bank-to-turn steering are reviewed and critical technology areas concerned with bank-to-turn control are ...
Riedel, F. W.
core   +1 more source

Improved Torsion Pendulum for Ground Testing of LISA Displacement Sensors

open access: yes, 2004
We discuss a new torsion pendulum design for ground testing of prototype LISA (Laser Interferometer Space Antenna) displacement sensors. This new design is directly sensitive to net forces and therefore provides a more representative test of the noisy ...
Carbone, L.   +6 more
core   +2 more sources

Advancing conservation breeding programs for marine invertebrates

open access: yesConservation Biology, EarlyView.
Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam   +3 more
wiley   +1 more source

Flight Investigation to Determine the Equivalent Parasite Drag Area and Required Power of a Single Rotor Helicopter

open access: yesThe Journal of the Japan Society of Aeronautical Engineering, 1965
Results of an investigation in the horizontal flight test of the equivalent parasite drag area and required power of a Kawasaki Bell KH-4 single rotor helicopter are given. Measurements of the tilt angles of main rotor were made to determine the equivalent parasite drag area, which was decreased with forward speed to 15.8 ft2 at maximum speed, owing to
openaire   +2 more sources

The effect of disturbance on a wing [PDF]

open access: yes
Disturbances such as flap and aileron hinges and poorly faired spoilers were simulated in a computer wind tunnel. The total drag of a single roughness element does not depend only on the size of that element.
Eppler, R.
core   +1 more source

Natural Parasitism of Nezara viridula (Linnaeus) (Hemiptera: Pentatomidae) by Trichopoda pictipennis Bigot (Diptera: Tachinidae) in an Organic Strawberry Field in Germany

open access: yesEntomologia Experimentalis et Applicata, EarlyView.
Natural parasitism of the invasive southern green stinkbug was recorded in an organic strawberry cropping system in southwestern Germany. The tachinid fly Trichopoda pictipennis shows successful establishment and field activity, indicating ongoing range expansion.
Sophie Wenz   +2 more
wiley   +1 more source

Flexible blade antenna Patent [PDF]

open access: yes, 1970
Flexible monopole antenna with broad bandwidth and low voltage standing wave ...
Lindsey, J. F., III, Nason, G. H.
core   +1 more source

A review on true dung beetles' evolutionary and ecological responses to temperature and impacts on ecosystem functions

open access: yesEcological Entomology, EarlyView.
True dung beetles are a speciose group of ecosystem engineers that play key roles as detritivores in natural and agricultural landscapes. Scarabaeine beetles show strong thermal plasticity and there is increasing evidence of rapid evolutionary divergence in response to temperature across ecological and evolutionary timescales, with likely consequences ...
Nathan J. McConnell   +4 more
wiley   +1 more source

A laboratory facility for electric vehicle propulsion system testing [PDF]

open access: yes
The road load simulator facility located at the NASA Lewis Research Center enables a propulsion system or any of its components to be evaluated under a realistic vehicle inertia and road loads.
Sargent, N. B.
core   +1 more source

Computer program for analysis of split-Stirling-cycle cryogenic coolers [PDF]

open access: yes, 1983
A computer program for predicting the detailed thermodynamic performance of split-Stirling-cycle refrigerators has been developed. The mathematical model includes the refrigerator cold head, free-displacer/regenerator, gas transfer line, and provision ...
Brown, M. T., Russo, S. C.
core   +1 more source

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