Brian John Julian

US Patent:

20080138059, Jun 12, 2008

Filed:

Dec 11, 2006

Appl. No.:

11/608915

Inventors:

Brian John Julian - Burlington MA, US
Anthony Mark Smith - Medway MA, US

International Classification:

G03B 9/40

US Classification:

396489

Abstract:

Described is a compact focal plane shutter system adapted for large-format exposure shutters. The focal plane shutter includes at least one multi-segmented screen having multiple rigid blades. Each blade can be moved at a different velocity. By using multiple blades, the rotational inertia about a drive axis can be reduced compared to a conventional single screen shutter system, thus a greater acceleration can be achieved with the same amount of torque about the drive axis. Using smaller blades allows for greater acceleration, resulting in faster shutter speeds to support a wider range of applications. Additionally, the overlap between blades of a multi-segmented screen in an open position is greater than the overlap of the blades in a closed position, providing a compact system. A drive mechanism linearly translates the blades of the multi-segmented screen between the open and closed positions.

US Patent:

20160077190, Mar 17, 2016

Filed:

Sep 2, 2015

Appl. No.:

14/843941

Inventors:

- Mountain View CA, US
Brian John Julian - Cupertino CA, US

International Classification:

G01S 5/02

Abstract:

Disclosed are apparatus and methods for providing outputs; e.g., location estimates, based on measurement bins (MBs) determined by a computing device. An MB can be associated with a wireless signal emitter (WSE), and can include a mean signal strength value (SSV) and a standard deviation of SSVs for each WSE associated with the MB. The computing device can designate a WSE. The computing device can determine a collection of the MBs associated with the designated WSE. The computing device can train a mean Gaussian process for the designated WSE based on the mean SSV and the standard deviation of SSVs of the collection of MBs. The mean Gaussian process can be associated with a covariance matrix having a diagonal entry based on a standard deviation of SSVs of an MB in the collection of MBs. The computing device can provide an estimated location based on the trained mean Gaussian process.

US Patent:

20160066156, Mar 3, 2016

Filed:

Feb 13, 2015

Appl. No.:

14/621991

Inventors:

- Mountain View CA, US
Brian John Julian - Mountain View CA, US

International Classification:

H04W 4/02
H04W 64/00

Abstract:

An indication that a wireless computing device (WCD) is moving toward a physical setting may be received. The physical setting may include a particular topography. There may be at least (i) location-determination information of a first type and (ii) location-determination information of a second type. The location-determination information of the first type may facilitate low-resolution location determinations in the physical setting and the location-determination information of the second type may facilitate high-resolution location determinations in the physical setting. Based on the physical setting and the particular topography, location-determination information may be selected from at least (i) the location-determination information of the first type or (ii) the location-determination information of the second type. At least some of the selected location-determination information may be used to estimate a location of the WCD.