Hua Shan Chen

6715126, Mar 30, 2004

Sep 15, 1999

09/396241

Subrina Shih-Pan Chang - Old Tappan NJ
Hua Chen - Riverside CA
Jeane Shu-Chun Chen - Chappaqua NY
Ephraim Feig - Chappaqua NY

International Business Machines Corporation - Armonk NY

G06F 1700

7155001

A method is described for efficiently delivering a presentation of web content comprised of a media, such as audio or video content, having defined time increments, together with one or more other content sources, such as images or events to be displayed on a monitor, synchronized so that the one ore more other images or events are displayed at predetermined time increments in the media presentation. Furthermore, the entire presentation is delivered in streaming fashion, so that the end user does not have to wait for the entirety of the content data to be downloaded before starting the presentation, but rather can start viewing and listening to the presentation after a relatively short delay period. The media data and the other content need not reside at a single server source. An authoring tool for creating such composite time-synchronous content automatically determines the necessary information for scheduling player requests to the servers.

20030023525, Jan 30, 2003

Jun 13, 2001

09/880309

Hua Chen - Brooklyn NY, US

G06F017/60

705/035000

The present invention involves a method and an apparatus capable of calculating, in real time, option-embedded coupon bearing bonds by option adjusted spread and linear approximation. The linear approximation uses a first order partial derivative to calculate a vector of sensitivities of bond price against yield curve by which an nth order linear approximation of the bond price can be approximated. The apparatus comprises a plurality of trader's workstations, one of which may serve as an option adjusted spread lattice engine for full lattice computation. The trader's workstations may be actuated by a triggering object, which receives yield curve, bond price, spread, volatility and other bond information updates from a database server. For each security, the Lattice Engine uses the lattice method to compute the price of the security and a vector of partial derivatives of the security price with respect to the yield curve. While other workstations, upon receiving any update of the yield curve, use the results of the Lattice Engine to perform first order approximation of the security prices. Since linear approximation is a simple calculation, the price update of a large number of securities can be carried out in real time. Because the Lattice Engine recalculates the first order partial derivatives when the yield curve has changed significantly, the linear approximations are very accurate in general.

60468114, Apr 4, 2000

Jan 11, 1996

8/583865

Lawrence B. Wolff - New York NY
Hua Chen - Baltimore MD

The Johns Hopkins University - Baltimore MD

G01J 400

356369

An apparatus for determining electrical conductivity of a surface of an object. The apparatus comprises a first polarizer for polarizing light incident upon the surface of the object. The apparatus also comprises a camera mechanism for receiving the polarized light reflected from the surface of the object and identifying the electrical conductivity of the surface of the object from phase retardance of polarization of the polarized light upon reflection from the surface of the object. The present invention pertains to a method for determining electrical conductivity of a surface of an object. The method comprises the steps of polarizing light. Next there is the step of reflecting the polarized light off the surface of the object. Then there is the step of receiving the reflected polarized light at a camera mechanism. Next there is the step of converting the received polarized light into a corresponding electrical signal with the camera mechanism.