Abstract: One or more electronic device may use motion and/or activity sensors to estimate a user's 6 minute walking distance. In particular, because users typically walk at less than their maximum output and in imperfect conditions, control circuitry within the device(s) may rely on walks of shorter distances to estimate the 6 minute walking distance. For example, the control circuitry may gather activity information for the user, such as heart rate, calories burned, and step count, and analyze a distance component and a speed component for periods in which the user has walked. Individual 6 minute walk distance estimates may be generated based on each of the activity information, distance component, and speed component. The distance and speed estimates may be corrected for walking behaviors that deviate from an ideal testing environment, and may then be fused with the activity estimate to generate a final 6 minute walk distance estimate.

Abstract: A marine radio wireless communication system (10) incorporating a remote wireless handset (26) and a fixed mount marine radio (18) for wireless communication on board a waterborne vessel (12) is disclosed. At least one marine radio remote wireless handset (26) is associated with and wirelessly linked to the fixed mount marine radio (18) for onboard remote acoustic communications between the two. Each fixed mount marine radio (18) and marine radio remote wireless handset (26) incorporates a speaker (80, 106) and a microphone (72, 102).

Abstract: A marine vessel (102) is operable to emit an audible signal based upon the velocity status of the marine vessel (102). The marine vessel (102) includes a first processor component (340) operable to determine the velocity of the vehicle based upon signal inputs (140, 142, 144). The marine vessel (102) further includes a database (310) containing a set of at least two audible signals. A second processor component (300) is operable to select an audible signal from the set of at least two audible signals based on the velocity of the marine vessel (102). A loudspeaker (110) emits the selected audible signal from the marine vessel (102).

Abstract: A marine vessel (102) is operable to set the operating mode of its marine radio (108) based upon the location of the marine vessel (102). The marine vessel (102) includes a first processor component (340) operable to determine the location of the marine vessel (102) based upon signal inputs (140, 142, 144). The marine radio (108) incorporates a database (310) containing a set of at least two operating modes and a second processor component (300) operable to select an operating mode from the set of at least two operating modes based on the location of the marine vessel (102).

Abstract: A process for separating a feed mixture of zirconium and petroleum coke containing traces amount of radioative materials by flotation process utilizing a plurality of flotation cells. The process comprises grinding the feed mixture, slurrying the ground feed mixture with water, treating the slurry with a flotation agent and a collector for the coke and subjecting the treated slurry to air sparging and agitation to create an overflow and an underflow. The overflow is then filtered to collect substantially zircon-free coke for further processing.

Abstract: A process for separating zirconium values from hafnium values wherein an aqueous solution of ZrCl.sub.4 and HfCl.sub.4 is contacted with NH.sub.4 SCN, feeding the resultant solution into a solvent extraction system containing aqueous HCl and MIBK, separating off the solvent phase containing MIBK, HSCN, hafnium thiocyanate complex, and any decomposition products of HSCN to leave the aqueous phase raffinate containing NH.sub.4 Cl, zirconium oxide-chloride and low concentrations of HSCN, scrubbing the hafnium values from the separated solvent phase, treating the scrubbed solvent phase containing MIBK and HSCN with NH.sub.4 OH to convert the HSCN to NH.sub.4 SCN, separating the NH.sub.4 SCN from the treated solvent phase, treating the separated solvent phase to remove essentially all thiazolines, and scrubbing residual HSCN from the raffinate with the desulfurized solvent phase.

Abstract: A process for the recovery of substantially pure zirconium values from zircon sand which also contains Ra, U, Hf, Pb and other metal values, comprising contacting zircon sand in a chlorinator with a chlorination medium to form an off-gas stream containing chlorides of Zr, Hf, Si, and tract U. The off-gas stream is passed to a condenser to remove volatile Si chlorides and thereby provide a product stream containing condensed chlorides of Zr, Hf and tract U, treating the product stream in acidic aqueous medium in a separation stage to separate the principal Hf values from the principal Zr values. Adjusting the pH of the resulting effluent to between about 3 to about 7 in a second stage to precipitate the trace U values. The residue stream is treated by(A) leaching with an acidic aqueous system to solubilize the trace Ra, Pb and other metal values while settling out the unreacted zircon sand and chlorination medium, and contacting the resultant leach liquor first with Ba++ ions and then with SO.sub.

Abstract: A method of continuously producing in high yield ethyl silicate having a predetermined content of silica by adjusting the flowrate of reactants to the reactor in relation to the temperature of the reaction.