John Humphrey
Electrician in Newark, DE
License number
Delaware TH-0005862
Issued Date
Jan 19, 2011
Expiration Date
Jan 19, 2012
Category
Electrical Examiners
Type
Homeowner's Permit
Address
Address
2
Newark, DE 19711
Personal information
See more information about John Humphrey at radaris.comName
Address
Phone
54 Tenby Chase Dr, Newark, DE 19711
Professional information
Reformulation Of The Finite-Difference Time-Domain Algorithm For Hardware-Based Accelerators
US Patent:
7340695, Mar 4, 2008
Filed:
Apr 7, 2005
Appl. No.:
11/100861
Inventors:
James P. Durbano - Newark DE, US
John Humphrey - Newark DE, US
Fernando E. Ortiz - Newark DE, US
Dennis W. Prather - Newark DE, US
John Humphrey - Newark DE, US
Fernando E. Ortiz - Newark DE, US
Dennis W. Prather - Newark DE, US
Assignee:
EM Photonics, Inc. - Newark DE
International Classification:
G06F 17/50
US Classification:
716 1, 716 6
Abstract:
A hardware-based acceleration platform for computational electromagnetic algorithms, specifically the finite-difference time-domain (“FDTD”) method, comprises reformulating the FDTD algorithm in order to make it more hardware friendly. This reformulation makes use of split fields at every node in the mesh, and combines total- and scattered-field formulations into a single, hybrid formulation. By precomputing coefficients for the nodes in the mesh, it is possible for a single set of equations to support plane waves, point sources, PML ABCs, and PEC walls. In the method sources are determined by means of a lookup table, rather than through direct hardware computations. All of these modifications enable the hardware designer to much more easily develop an FDTD accelerator.
Hardware Implementation Of The Pseudo-Spectral Time-Domain Method
US Patent:
7295939, Nov 13, 2007
Filed:
Jun 24, 2003
Appl. No.:
10/517224
Inventors:
John R. Humphrey - Newark DE, US
James P. Durbano - Ridley Park PA, US
Dennis W. Prather - Landenberg PA, US
James P. Durbano - Ridley Park PA, US
Dennis W. Prather - Landenberg PA, US
Assignee:
EM Photonics, Inc. - Newark DE
International Classification:
G01R 23/16
US Classification:
702 77, 702 57
Abstract:
A computer hardware configuration for performing the pseudo-spectral time-domain (PSTD) method on data. The hardware configuration includes a forward fast Fourier transform (FFT) unit that calculates a forward fast Fourier transform (FFT) from the data, and a complex multiplication unit that receives the FFT-processed data and calculates a spatial derivative in the frequency domain from the FFT-processed data. The hardware configuration further includes an inverse fast Fourier transform (IFFT) unit that converts the spatial derivative in the frequency domain from the complex multiplication unit into the time domain, and a computation engine that solves a PSTD equation based upon the spatial derivative in the time domain received from the IFFT unit.
Aquaculture Feed Compositions
US Patent:
2012018, Jul 19, 2012
Filed:
Feb 10, 2012
Appl. No.:
13/370864
Inventors:
J. MARTIN ODOM - KENNETT SQUARE PA, US
MARIOS AVGOUSTI - KENNETT SQUARE PA, US
TIMOTHY ALLAN BELL - WILMINGTON DE, US
OLIVER WALTER GUTSCHE - WILMINGTON DE, US
JOHN L. HUMPHREY - NEWARK DE, US
KEITH W. HUTCHENSON - LINCOLN UNIVERSITY PA, US
ROBERT D. ORLANDI - LANDENBERG PA, US
MARIOS AVGOUSTI - KENNETT SQUARE PA, US
TIMOTHY ALLAN BELL - WILMINGTON DE, US
OLIVER WALTER GUTSCHE - WILMINGTON DE, US
JOHN L. HUMPHREY - NEWARK DE, US
KEITH W. HUTCHENSON - LINCOLN UNIVERSITY PA, US
ROBERT D. ORLANDI - LANDENBERG PA, US
Assignee:
E.I. DU PONT DE NEMOURS AND COMPANY - WILMINGTON DE
International Classification:
A23K 1/18, A23K 1/16
US Classification:
426601
Abstract:
A method of microbial cell disruption for use in making an aquaculture feed composition is disclosed, wherein a microbial biomass having a moisture level less than 10 weight percent and comprising oil-containing microbes is disrupted, resulting in a disruption efficiency of at least 30% of the oil-containing microbes to produce a disrupted microbial biomass, and, the disrupted microbial biomass is mixed with at least one aquaculture feed component to form an aquaculture feed composition.