Kenneth A Jensen

US Patent:

7862793, Jan 4, 2011

Filed:

Apr 7, 2006

Appl. No.:

11/278999

Inventors:

Kenneth J. Jensen - Berkeley CA, US
William E. Mickelson - San Francisco CA, US
Alex K. Zettl - Kensington CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

D01F 9/12

US Classification:

4234471, 4234472

Abstract:

Methods by which the growth of a nanostructure may be precisely controlled by an electrical current are described here. In one embodiment, an interior nanostructure is grown to a predetermined geometry inside another nanostructure, which serves as a reaction chamber. The growth is effected by a catalytic agent loaded with feedstock for the interior nanostructure. Another embodiment allows a preexisting marginal quality nanostructure to be zone refined into a higher-quality nanostructure by driving a catalytic agent down a controlled length of the nanostructure with an electric current. In both embodiments, the speed of nanostructure formation is adjustable, and the growth may be stopped and restarted at will. The catalytic agent may be doped or undoped to produce semiconductor effects, and the bead may be removed via acid etching.

US Patent:

7915973, Mar 29, 2011

Filed:

Aug 25, 2006

Appl. No.:

11/467422

Inventors:

Alex K. Zettl - Kensington CA, US
Kenneth J. Jensen - Berkeley CA, US
Caglar Girit - Albany CA, US
William E. Mickelson - San Francisco CA, US
Jeffrey C. Grossman - Berkeley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H03H 9/24

US Classification:

333186, 333197, 977752

Abstract:

A tunable nanoscale resonator has potential applications in precise mass, force, position, and frequency measurement. One embodiment of this device consists of a specially prepared multiwalled carbon nanotube (MWNT) suspended between a metal electrode and a mobile, piezoelectrically controlled contact. By harnessing a unique telescoping ability of MWNTs, one may controllably slide an inner nanotube core from its outer nanotube casing, effectively changing its length and thereby changing the tuning of its resonance frequency. Resonant energy transfer may be used with a nanoresonator to detect molecules at a specific target oscillation frequency, without the use of a chemical label, to provide label-free chemical species detection.

US Patent:

8573031, Nov 5, 2013

Filed:

Feb 11, 2011

Appl. No.:

13/026122

Inventors:

Kenneth J. Jensen - Berkeley CA, US
Caglar O. Girit - Saint Cloud, FR
William E. Mickelson - San Francisco CA, US
Alexander K. Zettl - Kensington CA, US
Jeffrey C. Grossman - Brookline MA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01H 13/00
G01N 29/02

US Classification:

73 2406, 73 2401, 977957

Abstract:

A tunable nanoscale resonator has potential applications in precise mass, force, position, and frequency measurement. One embodiment of this device consists of a specially prepared multiwalled carbon nanotube (MWNT) suspended between a metal electrode and a mobile, piezoelectrically controlled contact. By harnessing a unique telescoping ability of MWNTs, one may controllably slide an inner nanotube core from its outer nanotube casing, effectively changing its length and thereby changing the tuning of its resonance frequency. Resonant energy transfer may be used with a nanoresonator to detect molecules at a specific target oscillation frequency, without the use of a chemical label, to provide label-free chemical species detection.

US Patent:

20100271003, Oct 28, 2010

Filed:

Sep 3, 2008

Appl. No.:

12/681760

Inventors:

Kenneth J. Jensen - Berkeley CA, US
Alexander K. Zettl - Kensington CA, US
Jeffrey A. Weldon - Oakland CA, US

Assignee:

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA

International Classification:

G01R 27/04
H03H 9/24

US Classification:

324 7649, 333200

Abstract:

A fully-functional radio receiver fabricated from a single nanotube is being disclosed. Simultaneously, a single nanotube can perform the functions of all major components of a radio: antenna, tunable band-pass filter, amplifier, and demodulator. A DC voltage source, as supplied by a battery, can power the radio. Using carrier waves in the commercially relevant 40-400 MHz range and both frequency and amplitude modulation techniques, successful music and voice reception has been demonstrated. Also disclosed are a radio transmitter and a mass sensor using a nanotube resonator device.

US Patent:

20110193062, Aug 11, 2011

Filed:

Nov 23, 2010

Appl. No.:

12/953210

Inventors:

Kenneth J. Jensen - Berkeley CA, US
William E. Mickelson - San Francisco CA, US
Alex K. Zettl - Berkeley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01L 29/872
H01L 21/329
B82Y 40/00
B82Y 99/00

US Classification:

257 14, 438468, 257E21359, 257E29338, 977762, 977932

Abstract:

Methods by which the growth of a nanostructure may be precisely controlled by an electrical current are described here. In one embodiment, an interior nanostructure is grown to a predetermined geometry inside another nanostructure, which serves as a reaction chamber. The growth is effected by a catalytic agent loaded with feedstock for the interior nanostructure. Another embodiment allows a preexisting marginal quality nanostructure to be zone refined into a higher-quality nanostructure by driving a catalytic agent down a controlled length of the nanostructure with an electric current. In both embodiments, the speed of nanostructure formation is adjustable, and the growth may be stopped and restarted at will. The catalytic agent may be doped or undoped to produce semiconductor effects, and the bead may be removed via acid etching.

US Patent:

20220185244, Jun 16, 2022

Filed:

Mar 1, 2022

Appl. No.:

17/653101

Inventors:

- San Francisco CA, US
Eyal Cohen - San Francisco CA, US
Kenneth James Jensen - Alameda CA, US
Randol Aikin - San Francisco CA, US
Brian Neil - San Francisco CA, US

International Classification:

B60T 7/12
B60T 13/66
B60T 8/174

Abstract:

Vehicles according to at least some embodiments of the disclosure include a sensor, and a computing device comprising at least one hardware processing unit. The computing device is programmed to perform operations comprising capturing an image with the sensor, identifying an object in the image, and in response to an accuracy of the identification meeting a first criterion, pre-loading a braking system of the autonomous vehicle. In some aspects, the computing device may predict that an obj ect not currently within a path of the vehicle has a probability of entering the path of the vehicle that meets a second criterion. When the probability of entering the path meets the second criterion, some of the disclosed embodiments may pre-load the braking system.

US Patent:

20200094794, Mar 26, 2020

Filed:

Dec 5, 2018

Appl. No.:

16/210967

Inventors:

- San Francisco CA, US
Eyal Cohen - San Francisco CA, US
Kenneth James Jensen - Alameda CA, US
Randol Aikin - San Francisco CA, US
Brian Neil - San Francisco CA, US

International Classification:

B60T 7/12
B60T 13/66
B60T 8/174

Abstract:

Vehicles according to at least some embodiments of the disclosure include a sensor, and a computing device comprising at least one hardware processing unit. The computing device is programmed to perform operations comprising capturing an image with the sensor, identifying an object in the image, and in response to an accuracy of the identification meeting a first criterion, pre-loading a braking system of the autonomous vehicle. In some aspects, the computing device may predict that an object not currently within a path of the vehicle has a probability of entering the path of the vehicle that meets a second criterion. When the probability of entering the path meets the second criterion, some of the disclosed embodiments may pre-load the braking system.

US Patent:

20190101649, Apr 4, 2019

Filed:

Dec 22, 2017

Appl. No.:

15/853448

Inventors:

- San Francisco CA, US
Kenneth Jensen - Alameda CA, US

International Classification:

G01S 17/89
G01S 17/46
G01S 7/497
G05D 1/02
G05D 1/00

Abstract:

Disclosed are systems, methods, and computer-readable storage media to control a vehicle. In one aspect, a method includes capturing point-cloud data representative of a surrounding of an autonomous vehicle with one or more LIDAR sensors, identifying a point in the point cloud data as a non-matching point in response to the point having no corresponding point in a map used to determine a position of the autonomous vehicle, determining whether the non-matching point is to he used in a determination of an overlap score based on one or more comparisons of the point cloud data and the map, determining the overlap score in response to the determining whether the non-matching point is to be used in the determination of the overlap score, determining a position of the autonomous vehicle based on the overlap score and the map, and controlling the autonomous vehicle based on the position.