Results 61 to 70 of about 1,847 (165)

Rotary plant growth accelerating apparatus [PDF]

open access: yes, 1975
Rotary plant growth accelerating apparatus for increasing plant yields by effectively removing the growing plants from the constraints of gravity and increasing the plant yield per unit of space is described.
Dedolph, R. D.
core   +1 more source

Space Shuttle Orbiter Atlantis Liquid Oxygen Prevalve Detent Roller Cracking Investigation [PDF]

open access: yes
During routine inspections of the Space Shuttle's Main Propulsion System (MPS) Liquid Oxygen (LO2) pre-valve, the mechanism provided to maintain the valve in the open position was found cracked.
Eddleman, David   +3 more
core   +2 more sources

In Flight Evaluation of Active Inceptor Force-Feel Characteristics and Handling Qualities [PDF]

open access: yes, 2012
The effect of inceptor feel-system characteristics on piloted handling qualities has been a research topic of interest for many years. Most of the research efforts have focused on advanced fly-by-wire fixed-wing aircraft with only a few studies ...
Blanken, Chris L.   +4 more
core   +1 more source

Research and development of on board control systems and elements for aerospace vehicles [PDF]

open access: yes
Onboard control systems and elements for aerospace vehicles - signal noise in fluid amplifier, hydraulic and pneumatic stepping motors, fluid transmission line dynamics, analog computer circuits, electric servomotor, and closed ...
Tamulis, J. C.
core   +1 more source

Polycyclic aromatic hydrocarbons (PAHs) in air and vegetation: case study at three selected toll stations along North South Expressway in Johor, Malaysia [PDF]

open access: yes, 2012
Polycyclic aromatic hydrocarbons (PAHs) from vehicular emission are products of the incomplete combustion of organic fuel, and are usually attached to the particulate matter from the emission and can caused pollution and hazard to human health due to
Azhari, Azliyana
core  

Antimicrobial Peptide Synergies for Fighting Infectious Diseases. [PDF]

open access: yesAdv Sci (Weinh), 2023
Mhlongo JT   +3 more
europepmc   +1 more source

A Recommended New Approach on Motorization Ratio Calculations of Stepper Motors [PDF]

open access: yes
Stepper motors are widely used on most spacecraft mechanisms requiring repeatable and reliable performance. The unique detent torque characteristics of these type of motors makes them behave differently when subjected to low duty cycle excitations where ...
Blais, Thierry   +2 more
core   +1 more source

Powering Implantable and Ingestible Electronics. [PDF]

open access: yesAdv Funct Mater, 2021
Yang SY   +8 more
europepmc   +1 more source

Integrated Application of Active Controls (IAAC) technology to an advanced subsonic transpot project-demonstration act system definition [PDF]

open access: yes
The 1985 ACT airplane is the Final Active Controls Technology (ACT) Airplane with the addition of three-axis fly by wire. Thus it retains all the efficiency features of the full ACT system plus the weight and cost savings accruing from deletion of the ...
Crumb, C. B.   +7 more
core   +1 more source

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