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Songbirds' reproductive success reduced by natural gas compressor noise


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IMAGE: Both bluebirds and tree swallows, like this one, nesting in noisy boxes spent less time incubating their eggs, had fewer eggs hatch and produced fewer young than their neighbors nesting.
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Credit: Julian Avery, Penn State
Some songbirds are not dissuaded by constant, loud noise emitted by natural gas pipeline compressors and will establish nests nearby. The number of eggs they lay is unaffected by the din, but their reproductive success ultimately is diminished.
That s the conclusion of a team of Penn State researchers who conducted an innovative, elaborate study that included unceasing playback of recorded compressor noise, 80 new, never-before-used nest boxes occupied by Eastern bluebirds and tree swallows, and behavioral observations with video cameras placed within boxes. ....

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Navy Releases Final RFP for Large Displacement Unmanned Underwater Vehicle Program


USNI News
Navy Releases Final RFP for Large Displacement Unmanned Underwater Vehicle Program
December 24, 2020 3:11 PM
A surrogate Large Displacement Unmanned Undersea Vehicle (LDUUV) is submerged in the water in preparation for a test to demonstrate the capability of the Navy’s Common Control System (CCS) at the Naval Undersea Warfare Center Keyport in Puget Sound, Wash. in December 2015. US Navy Photo.
The Navy released the final request for proposals (RFP) for its Snakehead Large Displacement Unmanned Underwater Vehicle (LDUUV) Phase 2 program, the largest of its submarine-launched unmanned systems.
The service is already in fabrication on its Phase 1 LDUUV, which will deliver next year to begin test and evaluation activities. The vehicles delivered under this Phase 2 LDUUV contract will be the first ones used operationally. ....

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