| Passive Sound Localization in the Barn Owl |
Aug 1999 |
7 pages |
| Authors:
Clay Spence; John Pearson; SARNOFF CORP PRINCETON NJ
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 | Other interesting problems in the owl 1. Visual/auditory fusion in the optic tectum (OT); adaptive alignment ICx 2. ITD disambiguation (combine frequencies) 3. Details of VLVp connections and dynamics 4. IID tuning mechanism in ICc lateral shell 5. Dependence on average binaural intensity in OT Problems we have yet to work on: 1. Motion sensitivity in IC 2. Adaptation in VLVp. |
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| An Intelligent Ultrasonic Inspection System for Flooded Member Detection in Offshore Structures, |
SEP 1993 |
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| Authors:
Gordon Hayward; John Pearson; Gordon Stirling
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 | This paper describes an ultrasonic system for automatic underwater inspection of steel jacket offsore installations. It is based on the unambiguous detection of water ingress in normally sealed tubular members, thereby providing an indication of through wall structural failure. A novel transducer design, based on a dual frequency array of 1-3 connectivity thickness drive transducers, is used to provide required sensitivity and act also as an environmental monitor for input ... |
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| Controlled Fragmentation with Fragment Mix. |
20 AUG 1991 |
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| Authors:
John Pearson; DEPARTMENT OF THE NAVY WASHINGTON DC
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| In the present invention the profile and orientation of grooves formed on the interior surface of the single walled cylinder control shear fracture trajectories and permit tailoring of the fragment yield. the groove pattern utilized in a cylindrical warhead is made up of two families of parallel helical grooves which intersect to form a repeating diamond pattern. The diamonds so produced have their major-axis-parallel to the longitudinal axis cylindrical. Also, ... |
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| A Two-Camera System to Study Underwater Explosions |
APR 1972 |
28 pages |
| Authors:
John Pearson; Lawrence N. Cosner; Rolland Gallup; NAVAL WEAPONS CENTER CHINA LAKE CA
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| A photographic system is described which uses two high-speed framing cameras, special illumination techniques, and appropriate synchronization to study the behavior of small underwater explosions in both the microsecond and millisecond time ranges. A Cordin camera is used to study pressure pulse behavior and the formation of cavitation fields. A Fastax camera is used to study the bubble effect and gross water motion. Typical results obtained from such a two-camera ... |
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| ENGINEERING PROPERTIES OF EXPLOSIVELY WORK-HARDENED STEELS |
Sep 1962 |
41 pages |
| Authors:
GEORGE A HAYES; John Pearson; BUREAU OF NAVAL WEAPONS WASHINGTON DC
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| An experimental study is discussed in which permanent changes were produced in the engineering properties of 4 annealed steels (1015, 1030, 1050, and 4130) by means of contact explosive charges of different thicknesses. Quantitative data is presented for explosively induced changes in proportional limit, yield strength, ultimate strength, fracture strength, elongation, and toughness for the 4 steels as related to charge thickness and distance from the metal-explosive interfaces. |
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Reports by Author
