Lim Lieu Nguyen, 62807 69Th St, Omaha, NE 68132

6442190, Aug 27, 2002

Nov 10, 1998

09/189187

Lim Nguyen - Omaha NE

The Board of Regents of the University of Nebraska - Lincoln NE

H04B 1707

375141, 375133, 375135, 375146

Disclosed is a method of âself-encodingâ data symbols for transmission over spread-spectrum, (eg. (CDMA), (FDMA)), communication systems which utilizes encountered data symbols, in a sequence of data symbols, to develop data symbol energy spreading codes which are applied to encode subsequently encountered data symbols. The method includes decoding each encoded data symbol after it is transmitted to a receiver in the spread-spectrum communication system.

6825444, Nov 30, 2004

Oct 29, 2001

09/890445

Christopher Y. Tuan - Omaha NE
Sherif Yehia - Omaha NE
Bing Chen - Omaha NE
Lim Nguyen - Bellevue NE

Board of Regents of University of Nebraska - Lincoln NE

H05B 300

219213, 219541, 14 73, 404 71, 404 79, 392432

A heated bridge deck ( ) uses electrodes ( ) embedded within conductive concrete and connected to a power source to remove snow and ice accumulation. A cement-based mixture containing optimal amounts of conductive materials is molded into pre-formed slabs ( ) placed atop the paved surface of a bridge deck. Alternatively, the conductive concrete may be cast in place on top of an existing bridge deck. A control unit with temperature and moisture sensors may be coupled to the heated bridge deck.

2019011, Apr 18, 2019

Oct 12, 2018

16/158620

Lim Nguyen - Papillion NE, US

H03F 3/45
H03F 1/22

Systems and methods for providing a high performance current source are described. In an example implementation, the current source includes transistors in dual current mirror configuration. The dual mirror configuration employs current feedback to increase the output resistance of the current source while achieving a wide voltage swing.

2018012, May 10, 2018

Nov 8, 2017

15/807473

- Lincoln NE, US
Lim Nguyen - Bellevue NE, US

G02B 6/26
G02B 6/14
G02B 1/04
G02B 6/032

An optical fiber (OF) spatial mode filter element includes a structure having an internal cylindrical volume and is adapted to connect an exit end of a first OF with an entrance end of a second OF. An index of refraction of the structure is greater than an index of refraction of a material within the internal cylindrical volume, and when disposed between the exit end of the first OF with the entrance end of the second OF a gap width of the hollow volume between the exit end of the first OF and the entrance end of the second OF defines an effective numerical aperture of the entrance end of the second OF.

2016023, Aug 11, 2016

Jun 24, 2014

14/392258

- Lincoln NE, US
Lim Nguyen - Bellevue NE, US

H05K 9/00
E04B 1/92
C04B 28/04

Conductive concrete mixtures are described that are configured to provide EMP shielding and reflect and/or absorb, for instance, EM waves propagating through the conductive concrete mixture. The conductive concrete mixtures include cement, water, conductive carbon material, magnetic material, and metallic conductive material. The conductive carbon material may include conductive carbon particles, conductive carbon powder, and/or coke breeze. The metallic conductive material may include steel fibers, and the magnetic material may include taconite. The conductive concrete mixture may also include supplementary cementitious materials (SCM). A method of making a concrete structure includes pouring a concrete mixture to form conductive concrete, and positioning a first conductive screen within the conductive concrete proximate to an exterior surface of the conductive concrete. The method also includes positioning a second conductive screen within the conductive concrete in electrical contact with the first conductive screen.