Feng H Chen

US Patent:

6451123, Sep 17, 2002

Filed:

Jan 11, 2000

Appl. No.:

09/481732

Inventors:

Michael Saska - Baton Rouge LA
Feng Chen - Baton Rouge LA

Assignee:

Board of Supervisors of Louisiana State University and Agricultural and Mechanical College - Baton Rouge LA

International Classification:

B01D 1508

US Classification:

127 462, 127 463

Abstract:

Improved separations of xylose, mannose, galactose, arabinose, glucose, xylitol, arabitol; sorbitol, galactitol, or mannitol (and other monosaccharides and sugar alcohols) from other sugars and sugar alcohols may be achieved by chromatography over hydroxyl-form anion exchange surfaces prepared from anion exchange resins at relatively low hydroxyl concentrations. When a strong base anion exchange resin, such as a chloride-form strong base anion exchange resin, is conditioned with a low concentration of hydroxyl (for example, an NaOH solution with a concentration between 0. 1 and 1000 mM, most preferably between 1 and 10 mM), the conditioned resin separates a number of sugars and sugar alcohols from one another, while still allowing ready desorption from the resin.

US Patent:

6754581, Jun 22, 2004

Filed:

Dec 4, 2001

Appl. No.:

10/004671

Inventors:

Scott Blachowicz - Bothell WA
Larry Brasfield - Mercer Island WA
Feng Chen - Houston TX
Roberto Cormack - Houston TX
Barry Davis - Shoreline WA
Rose Dossett - Houston TX
David Helms - Houston TX
Dennis Howard - Seattle WA
John Legh-Page - Houston TX
Craig Paynter - Renton WA
Randy Robertson - Kirkland WA
Jim Rouse - Missouri City TX

Assignee:

AR Group, Inc. - Houston TX

International Classification:

G01C 2100

US Classification:

701202, 701207, 701208, 455456, 342 36

Abstract:

A system, method, and computer program is disclosed for managing integrated real-time information about air flight trips, providing that information to multiple users, and receiving feedback from multiple users. A plurality of user interfaces are provided for displaying a plurality of types of information about a real time progress air trips as planned by an operational center. A communication channel is provided for receiving feedback information from the users and associating that feedback with a particular aspect of the trip.

US Patent:

6890960, May 10, 2005

Filed:

Oct 18, 2000

Appl. No.:

09/856760

Inventors:

Gregg Henderson - Saint Gabriel LA, US
Roger A. Laine - Baton Rouge LA, US
Donald O. Heumann - Metairie LA, US
Feng Chen - Baton Rouge LA, US
Betty C. R. Zhu - Baton Rouge LA, US

Assignee:

Board of Supervisors of Louisiana State University and Agricultural and Mechanical College - Baton Rouge LA

International Classification:

A01N035/00
A01N031/00

US Classification:

514691, 514729

Abstract:

Extracts of vetiver oil were found to significantly repel termites. In one extract, nootkatone was isolated and found to be a significant repellent and toxicant of termites. Nootkatone significantly decreased food consumption, decreased tunneling behavior, and increased mortality in termites. Nootkatone is an effective repellent and toxicant of termites either by itself or as an addition to other materials or substrates, including mulches made from vetiver grass roots or other wood products. Nootkatone can also be used to protect construction wood from attack by Formosan subterranean termites. Nootkatone as a repellent is non-toxic to humans and other mammals and is environmentally safe. In addition, α-cedrene was found to be a weak termite repellent; and both zizanol and bicyclovetivenol were found to be repellents and toxicants of termites.

US Patent:

6906108, Jun 14, 2005

Filed:

Aug 17, 2001

Appl. No.:

09/932555

Inventors:

Gregg Henderson - Saint Gabriel LA, US
Donald O. Heumann - Metairie LA, US
Roger A. Laine - Baton Rouge LA, US
Lara Maistrello - Baton Rouge LA, US
Betty C. R. Zhu - Baton Rouge LA, US
Feng Chen - Baton Rouge LA, US

Assignee:

Board of Supervisors of Louisiana State University and Agricultural and Mechanical College - Baton Rouge LA

International Classification:

A61K031/12
A61K031/045
A61K031/015
A01N027/00

US Classification:

514691, 514729, 514766

Abstract:

Extracts of vetiver oil were found to be significant repellents and toxicants of ants, ticks, and cockroaches. Nootkatone was shown to significantly decrease ant invasion and increase mortality in fire ants. Nootkatone is an effective repellent and toxicant of ants either by itself or as an addition to other substrates, including mulches made from vetiver grass roots, diatomaceous earth, alumina, silica, clays; building materials made from either aluminum or wood; and other suitable solid substances. Nootkatone was also a repellent and toxicant to ticks; and a repellent to cockroaches. Nootkatone is non-toxic to humans and other mammals and is environmentally safe. In addition, it is believed that other extracts of vetiver oil, specifically α-cedrene, zizanol and bicyclovetivenol, will be effective against ants, ticks, and cockroaches.

US Patent:

7351744, Apr 1, 2008

Filed:

Aug 14, 2003

Appl. No.:

10/641315

Inventors:

Gregg Henderson - St. Gabriel LA, US
Sanaa A. Ibrahim - Baton Rouge LA, US
Rosemary Patton - Lake Charles LA, US
Roger A. Laine - Baton Rouge LA, US
Betty C. R. Zhu - Baton Rouge LA, US
Feng Chen - Central SC, US

Assignee:

Board of Supervisors of Louisiana State University and Agricultural and Mechanical College - Baton Rouge LA

International Classification:

A01N 35/00

US Classification:

514682, 424 84, 424405, 424406, 424DIG 11, 514717

Abstract:

Several derivatives of naphthalene, including 1′-acetonaphthone, 2′-acetpnaphthone, 1-methoxynaphthalene, and 2-methoxynaphthalene, were discovered to be effective toxicants and repellents of termites, and resulted in significant reduction in termite feeding activity. For example, 2′-acetonaphthone was found to be an effective repellent and feeding deterrent of termites. Termites exposed to concentrations as low as 8 mg/kg sand exhibited a significant reduction in tunneling and feeding activity. Moreover, some of the dead termites had symptoms indicative of a failure to molt. At concentrations ≧20 μg/cm, 2′-acetonaphthone was a strong repellent. Interestingly, at 160-fold lower concentration (0. 125 μg/cm), 2′-acetonaphthone stimulated termite feeding activity. As a sand barrier, 2′-acetonaphthone significantly inhibited tunneling and feeding activity in concentrations from 8. 33 to 35. 0 mg/kg.

US Patent:

RE40661, Mar 10, 2009

Filed:

Sep 21, 2001

Appl. No.:

09/996086

Inventors:

Dong-seek Park - Suwon-si, KR
John Villasenor - Santa Monica CA, US
Feng Chen - Irvine CA, US
Max Luttrell - Venice CA, US
Brendan Dowling - Malibu CA, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si
Regents of the University of California - Oakland CA

International Classification:

G06F 11/00

US Classification:

714825, 714775, 714746, 714748, 714751, 375364, 375368

Abstract:

An error protection method for multimedia improves data recovery and channel throughput in channels which cause a random error and a burst error by using a rate compatible punctured convolutional code (RCPC) and an automatic retransmission on request (ARQ). In a process of decoding a plurality of packets of given information, the error protection method includes the steps of a) decoding one of the plurality of packets, b) decoding another packet when an error occurs during the decoding in step a), c) decoding a combination of the packets from steps a) and b) or a third packet when an error occurs in step b), and d) repeating step c) until the decoding error no longer occurs. The error protection method has the characteristics of both Type-1 and Type-2 ARQ methods. Therefore, one can obtain constant channel throughput in a channel containing burst errors, a channel containing random errors, and a channel in which the two types of error patterns coexist simultaneously.

US Patent:

7609865, Oct 27, 2009

Filed:

Nov 8, 2005

Appl. No.:

11/269312

Inventors:

Feng Chen - Houston TX, US

Assignee:

Biomagnetics - Houston TX

International Classification:

G06K 9/00

US Classification:

382124

Abstract:

A method and system for biometric identification utilizes structured light (e. g. , fine grid) that is projected to the target objects (fingers and palm). The image with structured light on the object contours can give 3D information of the objects with resolution to satisfy NIST fingerprint standard. In embodiments, the structured light can be of different color, to reduce the burden of the software processing. To enhance the capture speed, a model with 2D image on “smooth” 3D surface can be used. In this “2. 5-D” case, the finest feature of the structured light can be as big as millimeter size. Although grid-structured light can satisfy current requirement of fingerprint and palm print capture standards, in other embodiments, a customized structure based on the initial scan result can give optimal result on the 3D data. This may be useful when higher resolution is desired.

US Patent:

7611969, Nov 3, 2009

Filed:

Feb 17, 2006

Appl. No.:

11/356767

Inventors:

Feng Chen - Houston TX, US
Yu-Yi Xue - Houston TX, US
Jason Shulman - Houston TX, US
Stephen Tsui - Houston TX, US

Assignee:

University of Houston - Houston TX

International Classification:

H01L 21/326
H01L 21/00

US Classification:

438466, 438 22, 438 24

Abstract:

A negative dielectric is induced by the application of a dc bias-electric field in aggregates of oxide nano-particles whose surfaces have been specially treated. The magnitude of the dielectric constant and the frequency where the negative dielectric constant occurs can be adjusted. Such material systems have profound implications in novel devices as well as in science development, e. g. unusual wave propagation, secured communication and ultra-high temperature superconductivity.