Michael J Shea

US Patent:

6868434, Mar 15, 2005

Filed:

Aug 7, 2000

Appl. No.:

09/633476

Inventors:

Mark C. Terranova - Maynard MA, US
Michael P. Shea - Nashua NH, US
Robert E. Walsh - Foster City CA, US
Michael V. Iarrobino - Bedford NH, US
Michael J. Stokes - Beckenham, GB

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G06F015/16

US Classification:

709203, 709217

Abstract:

A system and method for testing server latencies using multiple concurrent users in a computer system is provided. A computer system may include a server and one or more clients. Multiple users may be created in the system such that each user may login to the server. The server may include a directory for each user and the directory for each user may be populated with a mix of files according to a user type for each user. An instance of a test program may be executed for each user on one or more clients concurrently. The server may authenticate each user using the same or different operating system protocols. Each instance of the test program may be configured to cause a series of accesses to one or more files in the directory of its respective user on the server and may be configured to cause a latency value to be measured and stored for each access that is performed. The latency values may be compiled by each instance of the test program and may be stored onto the server upon completion of each instance of the test program. The latency values measured by an instance of the test program may represent a first time portion that corresponds to the amount of time to perform a given access and a second time portion that corresponds to the server verifying that the user corresponding to this instance of the test program has permission to access the file.

US Patent:

55765920, Nov 19, 1996

Filed:

Nov 28, 1995

Appl. No.:

8/563419

Inventors:

William D. Koenigsberg - Concord MA
Michael J. Shea - Salem MA
Gregory Zaslavsky - Marblehead MA

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H01J 102
H01J 724
H01J 6152
H01J 1716

US Classification:

313 25

Abstract:

In a metal halide arc discharge lamp having a light emitting arc discharge tube surrounded by a heat absorbing, light transmissive shroud hermetically sealed within an outer lamp envelope, more nearly isothermal operation of the arc tube surface is achieved by using a shroud having a geometry (e. g. , a hollow frustum of a cone) such that the shroud is closer to the cooler portions of the arc tube than to the hotter portions. At steady state lamp operation, the shroud absorbs heat emitted by the arc tube and radiates a portion of the absorbed heat back to the arc tube. By having a shroud geometry and spacing such that the inner surface of the shroud is closest to the coolest portions of the arc tube and furthest away from the hottest portions of the arc tube, the shroud radiates more heat back to the cooler portions, thereby providing more nearly isothermal operation of the surface of the arc tube than can be accomplished with a coaxial, cylindrical shroud or no shroud.

US Patent:

20210011156, Jan 14, 2021

Filed:

Jul 10, 2019

Appl. No.:

16/507832

Inventors:

- Nashua NH, US
David J. Couto - Pepperell MA, US
Prabahan Basu - Lexington MA, US
Michael J. Shea - Beverly MA, US

Assignee:

BAE Systems Information and Electronic Systems Integration Inc. - Nashua NH

International Classification:

G01S 17/10
G01S 7/52
H04B 10/556
H04B 1/69

Abstract:

A multi-user system to simultaneously perform operations such as communication, RADAR, Light Detection and Ranging (LIDAR) and Relative Navigation (RELNAV). The techniques according to an embodiment includes generating a Fourier based orthogonal chirp sequence of length P, a prime number greater than the number of users targeted for communication. The orthogonal chirp sequence is based on an identifier, in the range of one to P−1, associated with one of the targeted users. The method further includes using the orthogonal chirp sequence to generate a spread user signal based on a message directed to the one targeted users. The method further includes generating a sequence of training pulses for insertion into the spread user signal to facilitate reception of the signal. The method further includes transmitting and receiving a reflection of the spread user signal from one of the targeted users, the reflection used to detect and range the user.

Address:

1301 Indian Oaks Dr, Melbourne, FL 32901

VIN:

4A3AK24F57E059838

Make:

MITSUBISHI

Model:

ECLIPSE

Year:

2007