Bubbles in water are studied intensively. For modeling and measurement purposes it is sometimes assumed that bubbles are spherical, but this is only true up to a certain size: When the hydrostatic pressure difference from top to bottom of the bubble is larger than the internal pressure inside the bubble...
…Wherein we’ll learn about the LISST-Tau and some of the ongoing developments at Sequoia. (Part XIII can be found here https://www.sequoiasci.com/article/the-history-of-sequoia-part-xiii/ ) In the fall of 2019 Sequoia got the opportunity to develop a dedicated transmissometer. While the laser-diffraction...
…Wherein we’ll learn about the LISST-AOBS, Hyper-bb and LISST-Horizon. (Part XII can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-xii/ ) After the LISST-ABS introduction in 2016, Yogi noted that the LISST-ABS and turbidity sensors have opposite-trending changing sensitivities...
…Wherein we’ll learn about the LISST-ABS and the LISST-200X (Part XI can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-xi/) In 2013 Yogi came up with an idea for a point sensor for measuring suspended sediment concentration; the LISST-ABS. It was developed in collaboration...
…Wherein we’ll learn about the LISST-VSF and some arriving and departing employees. (Part X can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-x/ ) The LISST-VSF In 2011, Sequoia finished an SBIR (Small Business Innovation Research grant) and developed a full-angle...
…Wherein we’ll learn about the use of LISSTs during the Deepwater Horizon accident in 2010 (Part IX can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-ix/) Particle size distribution is important in many areas. When the Deepwater Horizon disaster occurred in the Gulf...
…Wherein we’ll learn about the LISST-Holo and what else happened in the late 2000’s! (Part VIII can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-viii/) At the PiE 2008 meeting, one of the presentations was by a young scientist from the UK – George Graham. He showed...
…Wherein we’ll learn about the LISST-Portable, and the first Particles in Europe (PiE) conference. (Part VII can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-vii/) Way back in the early 2000’s Chuck had an idea for a laboratory particle sizer based on the LISST-100X...
…Wherein we’ll learn about the LISST-Infinite, LISST-StreamSide, and the LISST-SL. (Part VI can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-vi/ ) Remember from Part VI that Dr. Gray from USGS had proposed the LISST-25? Around the same time, he and FISP also proposed...
Sequoia’s LISST-Holo2 captures holograms of suspended particles. Upon processing, particle size, distribution, concentration and images of all particles in the beam are recovered. The LISST-Holo2 has traditionally been used for suspended particles in the aquatic environment. However, Cohn et al. (2022)...