Christopher D Field

US Patent:

7323987, Jan 29, 2008

Filed:

Jun 10, 2005

Appl. No.:

11/150748

Inventors:

Antonios Seas - Ellicott City MD, US
Christopher Field - Baltimore MD, US
J. Marcos Sirota - Takoma Park MD, US

Assignee:

Sigma Space Corporation - Lanham MD

International Classification:

G08B 13/18

US Classification:

340557, 340907

Abstract:

A compact system for determining the presence and speed of an object/vehicle, and its application for Red Light Camera photo-enforcement is disclosed. The disclosed system uses accurate timing, laser radiation in the form of optical pulses, and the scattering effect of optical pulses from the road or vehicle surface to determine the presence of a vehicle, and estimate its speed. The system can determine whether an object/vehicle is present at a specific location, estimate its height, and in the case that the object/vehicle is moving, the system can estimate its speed. Combining the disclosed technology with commercially available digital recording techniques and equipment, a traffic photo-enforcement system can be constructed. The system is capable of monitoring traffic in an intersection/highway, measure vehicle speed, identify potential traffic violations, and trigger a visual recording device such as a camera or video system for documenting a violation. The system can serve as a tool by law enforcement agencies and research groups for other applications, such as measurement of traffic density, monitor vehicle speed, and the study of traffic patterns.

US Patent:

7616293, Nov 10, 2009

Filed:

Apr 29, 2005

Appl. No.:

11/118540

Inventors:

J. Marcos Sirota - Takoma Park MD, US
Antonios Seas - Ellicott City MD, US
Christopher Field - Baltimore MD, US
Marzouk Marzouk - Annapolis MD, US

Assignee:

Sigma Space Corporation - Lannam MD

International Classification:

G01P 3/36

US Classification:

356 28, 356 285

Abstract:

A system of lasers and detectors to detect the presence of objects and determine their speed is disclosed. The system comprises of a pair of lasers and a pair of detectors focused through a single lens or a pair of lenses. An electronic board that accompanies the lasers and detectors is used to provide the logic and decision making mechanism. Data collected and processed by the system yields such information as whether an object is present, whether the object is stationary or is moving, and subsequent speed information. The described system is also capable of providing additional information concerning the characteristics of the moving object such as its profile and length, and indication of a traffic violation.

US Patent:

20140001280, Jan 2, 2014

Filed:

Jun 25, 2013

Appl. No.:

13/926075

Inventors:

Christopher Field - Arlington VA, US
Alexander V. Terray - Alexandria VA, US
Sean J. Hart - Alexandria VA, US
Duane A. Rogers - Alexandria VA, US
Adam Lubrano - Alexandria VA, US
Michael P. Malito - Washington DC, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

B05B 12/08

US Classification:

239 13, 239 71

Abstract:

A method and system for generating vapors of liquid solutions where a pneumatically modulated liquid delivery system maintains a defined flow rate for a liquid solution. The pneumatically modulated liquid delivery system includes a flow meter configured to measure a flow rate for the liquid solution flowing from a pressure vessel; a microcontroller configured to determine a pressure necessary to achieve the defined flow rate; and an electronic pressure control unit configured to adjust the pressure inside the pressure vessel. The system includes a nebulizer coupled to the pneumatically modulated liquid delivery system configured to receive the liquid solution from the pneumatically modulated liquid delivery system at the defined flow rate and configured to generate an aerosol of the liquid solution. A heat tube can vaporize the aerosol generated by the nebulizer.

US Patent:

20200109049, Apr 9, 2020

Filed:

Dec 9, 2019

Appl. No.:

16/707120

Inventors:

- Arlington VA, US
Pehr E. Pehrsson - Fairfax Station VA, US
Kevin J. Johnson - Alexandria VA, US
Daniel Ratchford - Alexandria VA, US
Christopher Field - Arlington VA, US
Junghoon Yeom - Okemos MI, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

B82Y 10/00
H01L 29/45
G01N 27/414
G01N 27/12
H01L 29/06
B82Y 30/00

Abstract:

Disclosed herein is a method of providing a structure having two electrodes connected by nanowires, exposing the structure to an analyte that can adsorb onto the nanowires, and passing an electrical current through the nanowires to heat the nanowires to desorb the analyte. Also disclosed herein is an apparatus having the above structure; a current source electrically connected to the electrodes, and a detector to detect the analyte.

US Patent:

20180237294, Aug 23, 2018

Filed:

Apr 18, 2018

Appl. No.:

15/955721

Inventors:

- Arlington VA, US
Pehr E. Pehrsson - Fairfax Station VA, US
Kevin J. Johnson - Alexandria VA, US
Daniel Ratchford - Alexandria VA, US
Christopher Field - Arlington VA, US
Junghoon Yeom - Okemos MI, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

B82Y 10/00
H01L 29/45
G01N 27/414
G01N 27/12
B82Y 15/00
H01L 29/06

Abstract:

Disclosed herein is a method of providing a structure having two electrodes connected by nanowires, exposing the structure to an analyte that can adsorb onto the nanowires, and passing an electrical current through the nanowires to heat the nanowires to desorb the analyte. Also disclosed herein is an apparatus having the above structure; a current source electrically connected to the electrodes, and a detector to detect the analyte.

US Patent:

20160238554, Aug 18, 2016

Filed:

Feb 22, 2016

Appl. No.:

15/049404

Inventors:

- Arlington VA, US
Christopher Field - Arlington VA, US
Pehr E. Pehrsson - Fairfax Station VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

G01N 27/414
H01L 29/45
H01L 29/06

Abstract:

Disclosed herein is a structure having: a support, a plurality of nanowires perpendicular to the support, and an electrode in contact with a first end of each nanowire. Each nanowire has a second end in contact with the support. The electrode contains a plurality of perforations. The electrode contains a plurality of perforations. Also disclosed herein is a method of: providing the above support and nanowires; depositing a layer of a filler material that covers a portion of each nanowire and leaves a first end of each nanowire exposed; depositing a plurality of nanoparticles onto the filler material; depositing an electrode material on the nanoparticles, the ends of the nanowires, and any exposed filler material; and removing the nanoparticles and filler material to form an electrode in contact with the first end of each nanowire; wherein the electrode contains a plurality of perforations.

US Patent:

20150026023, Jan 22, 2015

Filed:

Jul 17, 2013

Appl. No.:

13/944082

Inventors:

Jacobo Marcos Sirota - Takoma Park MD, US
Thomas Joseph Bouchard - Vienna VA, US
Miodrag Cekic - Bethesda MD, US
Christopher Treadwell Field - Baltimore MD, US

International Classification:

G06Q 50/02
G01S 17/89
G01S 13/89
G01N 33/02
G01N 21/33
G01N 21/27
G01N 33/24
G06Q 40/00
G01N 21/35

US Classification:

705 35

Abstract:

The present invention is directed to a self consistent method for adaptive implementation of overflying multi sensor measurements and derivation of conclusions and determinations “agregants”, derived and/or developed from the measured results and/or resulting from science-based processing design to integrate and process the measured results and other data and scientific knowledge. Furthermore, the aggregants may be pertinent to determination of status and proactive management models of the at least one distributed resource by a single or repeatable implementation of one or several steps.