Dr. Crocker graduated from the Wake Forest University School of Medicine in 1982. He works in Knoxville, TN and specializes in Internal Medicine. Dr. Crocker is affiliated with James H Quillen VA Medical Center.
A low voltage control circuit is provided for individually controlling high voltage power provided over bus lines to a multitude of interconnected loads. An example of a load is a drive for capillary channels in a microfluidic system. Control is distributed from a central high voltage circuit, rather than using a number of large expensive central high voltage circuits to enable reducing circuit size and cost. Voltage is distributed to each individual load and controlled using a number of high voltage controller channel switches connected to high voltage bus lines. The channel switches each include complementary pull up and pull down photo isolator relays with photo isolator switching controlled from the central high voltage circuit to provide a desired bus line voltage. Switching of the photo isolator relays is further controlled in each channel switch using feedback from a resistor divider circuit to maintain the bus voltage swing within desired limits. Current sensing is provided using a switched resistive load in each channel switch, with switching of the resistive loads controlled from the central high voltage circuit.
Cindy K. Harnett - Livermore CA, US Robert W. Crocker - Fremont CA, US Bruce P. Mosier - San Francisco CA, US Pamela F. Caton - Berkeley CA, US James F. Stamps - Livermore CA, US
Assignee:
Sandia National Laboratories - Livermore CA
International Classification:
G01F 1/58
US Classification:
7386112
Abstract:
A device for measuring fluid flow rates over a wide range of flow rates (10 μL/min) and at pressures at least as great as 2,000 psi. The invention is particularly adapted for use in microfluidic systems. The device operates by producing compositional variations in the fluid, or pulses, that are subsequently detected downstream from the point of creation to derive a flow rate. Each pulse, comprising a small fluid volume, whose composition is different from the mean composition of the fluid, can be created by electrochemical means, such as by electrolysis of a solvent, electrolysis of a dissolved species, or electrodialysis of a dissolved ionic species. Measurements of the conductivity of the fluid can be used to detect the arrival time of the pulses, from which the fluid flow rate can be determined. A pair of spaced apart electrodes can be used to produce the electrochemical pulse. In those instances where it is desired to measure a wide range of fluid flow rates a three electrode configuration in which the electrodes are spaced at unequal distances has been found to be desirable.
Low Power, Scalable Multichannel High Voltage Controller
James Frederick Stamps - Livermore CA, US Robert Ward Crocker - Fremont CA, US Daniel Dadwa Yee - Dublin CA, US David Wright Dils - Fort Worth TX, US
Assignee:
Sandia Corporation - Livermore CA
International Classification:
H02J 1/00
US Classification:
307 29, 307 39
Abstract:
A low voltage control circuit is provided for individually controlling high voltage power provided over bus lines to a multitude of interconnected loads. An example of a load is a drive for capillary channels in a microfluidic system. Control is distributed from a central high voltage circuit, rather than using a number of large expensive central high voltage circuits to enable reducing circuit size and cost. Voltage is distributed to each individual load and controlled using a number of high voltage controller channel switches connected to high voltage bus lines. The channel switches each include complementary pull up and pull down photo isolator relays with photo isolator switching controlled from the central high voltage circuit to provide a desired bus line voltage. Switching of the photo isolator relays is further controlled in each channel switch using feedback from a resistor divider circuit to maintain the bus voltage swing within desired limits. Current sensing is provided using a switched resistive load in each channel switch, with switching of the resistive loads controlled from the central high voltage circuit.
Portable Apparatus For Separating Sample And Detecting Target Analytes
Ronald F. Renzi - Tracy CA, US Karl Wally - Lafayette CA, US Robert W. Crocker - Fremont CA, US James F. Stamps - Livermore CA, US Stewart K. Griffiths - Livermore CA, US Julia A. Fruetel - Livermore CA, US Brent A. Horn - Roy UT, US Isaac R. Shokair - Livermore CA, US Daniel D. Yee - Dublin CA, US Victoria A. VanderNoot - Pleasanton CA, US Boyd J. Wiedenman - Aiken SC, US Jason A. A. West - Pleasanton CA, US Scott M. Ferko - Livermore CA, US
Portable devices and methods for determining the presence of a target analyte using a portable device are provided. The portable device is preferably hand-held. A sample is injected to the portable device. A microfluidic separation is performed within the portable device and at least one separated component detected by a detection module within the portable device, in embodiments of the invention. A target analyte is identified, based on the separated component, and the presence of the target analyte is indicated on an output interface of the portable device, in accordance with embodiments of the invention.
Method Of Preparation Of Carbon Materials For Use As Electrodes In Rechargeable Batteries
Narayan Doddapaneni - Alburquerque NM James C. F. Wang - Livermore CA Robert W. Crocker - Fremont CA David Ingersoll - Alburquerque NM David W. Firsich - Dayton OH
Assignee:
Sandia Corporation - Albuquerque NM
International Classification:
H01M 404
US Classification:
423445R
Abstract:
A method of producing carbon materials for use as electrodes in rechargeable batteries. Electrodes prepared from these carbon materials exhibit intercalation efficiencies of. apprxeq. 80% for lithium, low irreversible loss of lithium, long cycle life, are capable of sustaining a high rates of discharge and are cheap and easy to manufacture. The method comprises a novel two-step stabilization process in which polymeric precursor materials are stabilized by first heating in an inert atmosphere and subsequently heating in air. During the stabilization process, the polymeric precursor material can be agitated to reduce particle fusion and promote mass transfer of oxygen and water vapor. The stabilized, polymeric precursor materials can then be converted to a synthetic carbon, suitable for fabricating electrodes for use in rechargeable batteries, by heating to a high temperature in a flowing inert atmosphere.
Name / Title
Company / Classification
Phones & Addresses
Mr. Robert Crocker President
C & S Insulation Inc Contractor - Insulation
647 Hillview Rd, Cambridge, ON N3H 5C3 5196200496, 5196200497
Robert Crocker President
C & S Insulation Inc Contractor - Insulation
5196200496, 5196200497
Robert Crocker President, Principal
Hills Tabernacle Religious Institutions · Religious Organization
916 Caruthers Ave, Nashville, TN 37204 6152696263
Robert E. Crocker Director
CBM COMPUTER CENTER, INC
Robert Crocker Principal
Robert K Crocker Business Services at Non-Commercial Site
551 W Knox St, Rutherford, TN 38369
Robert Crocker Principal
Robert Crocker Business Services at Non-Commercial Site
212 Sequoyah Trl, Hendersonville, TN 37075
Resumes
Supply Chain Optimization Analyst At Georgia-Pacific Llc
Supply Chain Optimization Analyst at Georgia-Pacific LLC
Location:
Atlanta, Georgia
Industry:
Logistics and Supply Chain
Work:
Georgia-Pacific LLC - Atlanta, GA since Nov 2011
Supply Chain Optimization Analyst
Georgia-Pacific LLC - Greater Atlanta Area Jun 2011 - Nov 2011
Master Database Management Intern
4 MS Entertainment - Knoxville, TN Oct 2010 - Apr 2011
Inventory Control Intern
Tennessee Clean Water Network - Knoxville, TN Jun 2010 - Oct 2010
Events Coordinator
Vector Marketing 2009-2010 Mar 2008 - May 2010
Sales Representative
Education:
University of Tennessee-Knoxville - College of Business Administration 2007 - 2011
Logistics, Supply Chain and International Business
Universidad Internacional Menéndez Pelayo 2010 - 2010
Minor, International Business
Languages:
English Spanish
Awards:
Hope Scholar The State of Tennessee I recieved this Awarad by testing at a high margin, in High-School, relative to the States' qualification measurements. I retained this Honor throughout my college career by maintaining a Grade Point Average above the required level. Traffic Club of Memphis Scholar The Traffic Club of Memphis The Traffic Club of Memphis Educational Foundation Scholarship
Program promotes the continuation of professionalism in the traffic, transportation and logistical fields by annually awarding at least one scholarship of up to $3,500 to a college student pursuing higher education in this area of study. Phi Eta Simga Honoree Phi Eta Sigma Honors Society Inspired by the past and dedicated to the future, the Society’s mission is to encourage and reward academic excellence among freshmen in institutions of higher learning.
Those elected to membership include those who have a cumulative grade-point average of at least 3.5 on a 4.0 scale at the end of any first year, full-time curricular period, provided they have carried a normal academic load acceptable toward a bachelor’s degree and rank in the upper 20 percent of their class.
Youve reached [email protected] -I like contests that are for cash -I am a bit slow as I type 1 handed as I was injured in hit & run car acident I was on bicycle -I only like ligit contests for...
Bragging Rights:
I live alone have no kids nor wife I'm 47 on ssdi & barely make it through a month anyway thats ligit I would like to try & make cash but I draw the line there no sex or crap as such either .