Timothy J. O’Hanlon

System design of the Keck Planet Finder

Steven R. Gibson, Andrew W. Howard, Kodi Rider, Samuel Halverson et autres

The Keck Planet Finder (KPF) is a fiber-fed, high-resolution, echelle spectrometer that specializes in the discovery and characterization of exoplanets using Doppler spectroscopy. In designing KPF, the guiding principles were high throughput to promote survey speed and access to faint targets, and …

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Keck Planet Finder: design updates

Steven R. Gibson, Andrew W. Howard, Kodi Rider, Arpita Roy et autres

The Keck Planet Finder (KPF) is a fiber-fed, high-resolution, high-stability spectrometer in development at the UC Berkeley Space Sciences Laboratory for the W.M. Keck Observatory. KPF is designed to characterize exoplanets via Doppler spectroscopy with a goal of a single measurement precision …

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A optical fiber double scrambler and mechanical agitator system for the Keck planet finder spectrograph

Martin M. Sirk, Edward Wishnow, Elisha Jhoti, Marie Weisfeiler et autres

We present the design and test results of a double-scrambler and fiber agitator system for the Keck Planet Finder (KPF) spectrograph. The mechanical agitator for modal noise suppression is constructed from two linear stages with the fibers mounted in a “W” curve. …

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Environmental Psychology: Origins and Development

Harold M. Proshansky, Timothy J. O’Hanlon

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Spatial Orientation in a Subway System

Arline L. Bronzaft, Stephen B. Dobrow, Timothy J. O’Hanlon

The absence of a clear structural legibility within the New York City subway system tends to make its users dependent on other informational aids about its structural design and operations-such as signs, announcements, and especially the official New York City subway map …

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The Nature of Environmental Experience

William H. Ittelson, Karen A. Franck, Timothy J. O’Hanlon

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Behavioural science and the rationalisation of architectural design.

Ittelson Wh, Timothy J. O’Hanlon