Results 61 to 70 of about 1,022 (147)

Space station proximity operations and window design [PDF]

open access: yes
On-orbit proximity operations (PROX-OPS) consist of all extravehicular activity (EVA) within 1 km of the space station. Because of the potentially large variety of PROX-OPS, very careful planning for space station windows is called for and must consider ...
Haines, Richard F.
core   +1 more source

Enhanced/Synthetic Vision and Head-Worn Display Technologies for Terminal Maneuvering Area NextGen Operations [PDF]

open access: yes, 2011
NASA is researching innovative technologies for the Next Generation Air Transportation System (NextGen) to provide a "Better-Than-Visual" (BTV) capability as adjunct to "Equivalent Visual Operations" (EVO); that is, airport throughputs equivalent to that
Arthur, Jarvis J., III   +5 more
core   +1 more source

A comparison of the Lixiscope with other X-ray imaging systems [PDF]

open access: yes
The imaging techniques relevant in the determination of the clinical potential of the Lixiscope are ...
Ofoghludha, F.
core   +1 more source

A New Weibull-G Family of Distributions [PDF]

open access: yes, 2016
Statistical analysis of lifetime data is an important topic in reliability engineering, biomedical and social sciences and others. We introduce a new generator based on the Weibull random variable called the new Weibull-G family.
Alizadeh, Morad   +5 more
core   +1 more source

Visual slant underestimation [PDF]

open access: yes
Observers frequently underestimate the in-depth slant of rectangles under reduction conditions. This also occurs for slanted rectangles depicted on a flat display medium.
Perrone, John A., Wenderoth, Peter
core   +1 more source

Perspective Imagery in Synthetic Scenes used to Control and Guide Aircraft during Landing and Taxi: Some Issues and Concerns [PDF]

open access: yes
Perspective synthetic displays that supplement, or supplant, the optical windows traditionally used for guidance and control of aircraft are accompanied by potentially significant human factors problems related to the optical geometric conformality of ...
Johnson, Walter W., Kaiser, Mary K.
core   +1 more source

Programmable remapper for image processing [PDF]

open access: yes, 1991
A video-rate coordinate remapper includes a memory for storing a plurality of transformations on look-up tables for remapping input images from one coordinate system to another. Such transformations are operator selectable.
Juday, Richard D., Sampsell, Jeffrey B.
core   +1 more source

The use of visual cues for vehicle control and navigation [PDF]

open access: yes
At least three levels of control are required to operate most vehicles: (1) inner-loop control to counteract the momentary effects of disturbances on vehicle position; (2) intermittent maneuvers to avoid obstacles, and (3) outer-loop control to maintain ...
Battiste, Vernol, Hart, Sandra G.
core   +1 more source

An insight into the altered ophthalmic dynamics during the COVID-19 pandemic. [PDF]

open access: yesIndian J Ophthalmol, 2022
Kaushik J   +8 more
europepmc   +1 more source

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