Insight M Inc.

Other

Abb Research Ltd.

Elena S F Berman

Manish P Gupta

Douglas Steven Baer

Scott Buchter

Michael Matthews

Harshil Kamdar

Erin Wetherley

John Brian Leen

Andrew Fahrland

Susan Lauren Fortson

John R Speakman

Edward L Melanson, Jr

A system for detecting a gas may include a first laser having a wavelength overlapping with two or more absorption features in a spectrum of the gas, a second laser having a wavelength centered away from absorbing features in the spectrum of the gas, and at least one sensor to determine a received power of the first laser and a received power of the second laser.

Methods and systems for open path gas detection

A method for spectral interpretation in absorption spectroscopy uses a nonlinear spectral fitting algorithm for interpretation of spectral features in complex absorption spectra. The algorithm combines two spectral modeling techniques for generating spectral models to be used in the curve fitting process: a line-shape model and a basis-set model. The selected models for all gas components are additively combined using a least squares minimization, allowing for quantification of multiple species simultaneously.

Spectral modeling for complex absorption spectrum interpretation

A method of measuring energy expenditure in a living subject comprises: (a) administering a specified dose of doubly-labeled water (HO) to a living subject; (b) obtaining samples at three or more times of body water from the living subject; (c) measuringH/H,O/O andO/O ratios in each of the obtained samples using optical spectroscopy; and (d) determining (1) a combined value of flux of body water and exhaled carbon dioxide from a change in measuredO/O over time, (2) a value of flux of body water alone from a change in measuredH/H over time, and (3) a reference value of isotopic background fluctuation from a change in measuredO/O over time. UsingO measurements to estimate background fluctuations of theH andO decreases the required isotope dosing of subjects or decreases uncertainty at current dosing levels.

Triple isotope method and analyzer for total energy expenditure measurements

Growing community of inventors

Mountain View, CA, United States of America

Elena S F Berman