Login  |  Register
   You are not logged in.
Research > Theoretical Studies
| Theoretical Studies | | |

Yogi's research interests are in the processes that involve turbulence at the sea surface and on the sea floor. These processes affect sediment suspension and transport on the sea floor, and they determine gas exchange and surface currents at the sea surface. Yogi's contributions to these fields include new measurement techniques with the use of laser instrumentation. In his first ocean research program, Yogi developed an autonomous deep-sea laser Doppler velocimeter which, operating at a depth of 5000 meters, obtained data on the structure of the boundary layer at small heights above the seabed. Subsequent applications of this technology has been made to study shallow water bottom boundary layers. The contributions in the surface boundary layer dynamics, made with a version of the deep-sea laser velocimeter, confirmed the existence of a super-dissipative layer beneath wind-forced, breaking waves. This work was published in Nature (please see publications list). More recently, he is developing a laser sensor for the direct observation of the rate of turbulent kinetic energy dissipation, known as the dissipation rate.

A powerful series of instruments for measuring sediment properties are Yogi's other contribution to sediment transport research. Using laser diffraction techniques common in the laboratory, it is now possible to measure particle (including bubble) size distribution for periods up to several months in the sea from programmable, unattended, recording instruments. Sequoia Scientific, Inc. markets these instruments known as the LISST-100. Yogi co-founded Sequoia Scientific, Inc. with H. Charles (Chuck) Pottsmith, his partner in science and business. A newer version of this instrument incorporates a settling tube and is known as the LISST-ST. Sequoia has also developed a new concept sediment sensor, the LISST-25, which circumvents the historical problem of sediment concentration sensors - calibration change with changed particle size.

Yogi's other passions are his family and the propagation of the Sequoia Giganteum tree. His latest experiment is the propagation of the Sequoia in the Himalayas where he has planted 50 trees in 1998. Yogi thinks he plays tennis and soccer, although evidence of this activity is hard to find in modern times. The company Sequoia seems to be all consuming for now.
Holographic Camera
First units to ship in late 2009 / early 2010!

Preliminary Spec sheet available!

Email us for more info!
2010 Ocean Sciences Meeting
Portland, OR, 22-26 February 2010, booth 415

Managing Stormwater in WA
Sea-Tac, WA, 4 March 2010

2010 NWQMC 7th Nat'l Monitoring Conference
Denver, CO, 25-29 April 2010, booth 304

USGS Nat'l Data Conference
Omaha, NB, 11-13 May 2010

Joint 9th FIS and 4th HMC Conferences
Las Vegas, NV, 27-20 June 2010

9th annual StormCon
San Antonio, TX, 2-4 August 2010, booth 421

Ocean Optics XX
Anchorage, AK, 25 September - 1 October 2010

CASQA 6th annual conference
CA, 1-3 Novemb
   

Website design by Papugai, copyright © 2008 Sequoia Scientific, Inc. Site Map

Sequoia Scientific, Inc.
2700 Richards Road, Suite 107, Bellevue, WA 98005
Phone: (866) 212-2226 Fax: (425) 643-0595
Email Us!