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This profile was last updated on 11/9/10  and contains information from public web pages.

Dr. Orest Diachok

Wrong Dr. Orest Diachok?

Marine Biophysicist

Phone: (410) ***-****  HQ Phone
Email: d***@***.edu
Local Address: Laurel, Maryland, United States
Johns Hopkins University
3400 North Charles Street
Baltimore, Maryland 21218
United States

Company Description: The Johns Hopkins University School of Nursing is a global leader in nursing research, education and scholarship and is ranked among the top 10 nursing higher...   more
Background

Employment History

Board Memberships and Affiliations

8 Total References
Web References
ATI's Underwater Acoustics for Biologists and Conservation Managers: A comprehensive tutorial designed for environmental professionals
www.aticourses.com, 9 Nov 2010 [cached]
Dr. Orest Diachok is a Marine Biophysicist at the Johns Hopkins University, Applied Physics Laboratory. Dr. Diachok has over 40 years experience in acoustical oceanography, and has published numerous scientific papers. His career has included tours with the Naval Oceanographic Office, Naval Research Laboratory and NATO Undersea Research Centre, where he served as Chief Scientist. During the past 16 years his work has focused on estimation of biological parameters from acoustic measurements in the ocean. During this period he also wrote the required Environmental Assessments for his experiments. Dr. Diachok is a Fellow of the Acoustical Society of America.
Acoustical Society of America - 151st Meeting Press Luncheon Press Release
www.acoustics.org, 24 May 2006 [cached]
Presenter: Orest Diachok, Johns Hopkins Applied Physics Laboratory, Laurel, MD (orest.diachok@jhuapl.edu)
In the Gulf of Alaska, humpback whales work in groups to capture herring, with one whale broadcasting sound at a herring school to drive them to the water surface. A second whale blows a "net" of bubbles to encircle the rising school. As Orest Diachok of the Johns Hopkins University Applied Physics Laboratory in Laurel, MD reports, during this process one or more of the whales emits long "trumpet" tones at several different frequencies, one of which resonates with, and is attenuated (absorbed) by the swim bladders of the herring (analogous to x-rays being absorbed by water in human lungs). Diachok proposes that the whales might use this phenomenon to infer the fish length, species, and size of school.
Acoustical Society of America - 151st Meeting Press Release
www.acoustics.org, 9 May 2006 [cached]
As Orest Diachok of the Johns Hopkins University Applied Physics Laboratory (orest.diachok@jhuapl.edu) in Laurel, MD reports, during this process one or more of the whales emits long "trumpet" tones at several different frequencies, one of which resonates with, and is attenuated (absorbed) by the swim bladders of the herring (analogous to x-rays being absorbed by water in human lungs). Diachok proposes that the whales might use this phenomenon to infer the fish length, species, and size of school (4aA05). What whales may do naturally is something that fisheries managers covet: Diachok and his collaborators have been working toward developing artificial acoustic systems that work in much the same way to detect and monitor fish populations.
Rhode Island news | projo.com | The Providence Journal | Local News
www.projo.com, 7 June 2006 [cached]
OREST DIACHOK, 65, from Johns Hopkins University, decided to study sound early in his career, after he got an offer to work for the Navy, measuring gravity at sea, he said.He found that naval officers, who trusted sonar technology, had no respect for any scientists -- except the experts in acoustics, he said.
Diachok has studied the sounds made by humpback whales.He theorizes that whales might use sound to not only detect schools of fish, but to determine the composition of the schools.
Imagine two whales on opposite sides of a school, he said.
Whale bubble nets, saxophone sounds, ultrasonic laser
www.eurekalert.org, 10 May 2006 [cached]
As Orest Diachok of the Johns Hopkins University Applied Physics Laboratory (orest.diachok@jhuapl.edu) in Laurel, MD reports, during this process one or more of the whales emits long "trumpet" tones at several different frequencies, one of which resonates with, and is attenuated (absorbed) by the swim bladders of the herring (analogous to x-rays being absorbed by water in human lungs).Diachok proposes that the whales might use this phenomenon to infer the fish length, species, and size of school (4aA05).What whales may do naturally is something that fisheries managers covet: Diachok and his collaborators have been working toward developing artificial acoustic systems that work in much the same way to detect and monitor fish populations.
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