David J Yee

US Patent:

6353830, Mar 5, 2002

Filed:

Feb 16, 2000

Appl. No.:

09/505492

Inventors:

David R. Yee - Pacifica CA
David Brennan Gaunce - Mountain View CA

Assignee:

Oracle Corporation - Redwood Shores CA

International Classification:

G06F 1700

US Classification:

707102, 707101, 707103

Abstract:

One embodiment of the present invention provides a method for constructing a query for an object-relational database. This method displays at least part of a schema for the object-relational database to a user in a graphical representation. Next, the method allows the user to perform graphical manipulations on the schema. The method then generates a query based upon the schema and the graphical manipulations, and this query is sent to the object-relational database. Another embodiment of the present invention provides a method for processing an object-relational query for transmission from a client to an object-relational database server. This method receives the query at the client, and parses the query to determine which object-relational structures the query is attempting to access. The method then determines from data dictionary information, loaded from the object-relational database server and cached locally on the client, if the object-relational structures the query is attempting to access exist in the object-relational database server. If they do not exist, the method indicates an error condition.

US Patent:

6718772, Apr 13, 2004

Filed:

Oct 26, 2001

Appl. No.:

10/040208

Inventors:

Ralph A. Dalla Betta - Mountain View CA
Marco A. Velasco - Milpitas CA
David K. Yee - Hayward CA
Sarento G. Nickolas - San Jose CA

Assignee:

Catalytica Energy Systems, Inc. - Mountain View CA

International Classification:

F02C 722

US Classification:

60776

Abstract:

Methods and apparatus, both devices and systems, for control of Zeldovich (thermal) NOx production in catalytic combustion systems during combustion of liquid or gaseous fuels in the post catalytic sections of gas turbines by reducing combustion residence time in the HC zone through control of the HC Wave, principally by adjusting the catalyst inlet temperature. As the fuel/air mixture inlet temperature (to the catalyst) is reduced, the HC Wave moves downstream (longer ignition delay time), shortens the residence time at high temperature, thereby reducing thermal NOx production. The countervailing increase in CO production by longer ignition delay times can be limited by selectively locating the HC Wave so that thermal NOx is reduced while power output and low CO production is maintained. NOx is reduced to on the order of 3 ppm, and preferably 2 ppm, while CO is maintained 100 ppm, typically 50 ppm, and preferably 5-10 ppm.

US Patent:

6796129, Sep 28, 2004

Filed:

Feb 7, 2002

Appl. No.:

10/071749

Inventors:

David K. Yee - Hayward CA
Sarento George Nickolas - San Jose CA

Assignee:

Catalytica Energy Systems, Inc. - Mountain View CA

International Classification:

F02C 916

US Classification:

60777, 60723, 431 7

Abstract:

The present additional control strategy has been developed to allow the gas turbine to operate at lower load or at other conditions where the total fuel required by the gas turbine is not optimum for full combustion of the fuel. The present invention manages air that bypasses the catalytic combustor and air that bleeds off of the compressor discharge. The bypass system changes the fuel air ratio of the catalytic combustor without affecting the overall gas turbine power output. The bleed system also changes the fuel air ratio of the catalytic combustor but at the cost of reducing the overall gas turbine efficiency. The key advantage of a catalytic combustor with a bypass and bleed system and the inventive control strategy is that it can maintain the catalyst at optimum low emissions operating conditions over a wider load range than a catalytic combustor without such a system.

US Patent:

6889337, May 3, 2005

Filed:

Jun 3, 2002

Appl. No.:

10/161826

Inventors:

David Yee - Burlingame CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F011/00

US Classification:

714 1, 714 38, 434116, 715729, 717124, 704271

Abstract:

A method for repeatable application testing on a computer system for audible output generated by the application in conjunction with a screen reader or similar assistive technology. The method includes recording user inputs to a user application using a test input component. The user inputs are also accessed by a screen reader input component. Outputs of the user application are recorded using a test output component. The outputs of the user application are also accessed by a screen reader output component. The resulting screen reader outputs are recorded and are analyzed with respect to the recorded user inputs and the recorded outputs of the user application. The user inputs to the user application can be keyboard inputs or mouse inputs, and inputs of other input devices. The outputs of the user application can be graphical outputs or alphanumeric outputs for a display of the computer system. The resulting screen reader outputs can be sound output signals (or representations thereof) for a sound system of the computer system.

US Patent:

7069263, Jun 27, 2006

Filed:

Feb 19, 2002

Appl. No.:

10/076540

Inventors:

David Randall Yee - Burlingame CA, US
Daryl Geoffrey Porter - Danville CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 17/30

US Classification:

707 3, 707 1, 707102

Abstract:

A method, system, computer program product, and database connectivity layer provides the capability to capture data over time so that trend analysis may be performed that does not require modifications to the data model and the data processing applications. A method of automatically capturing data for trend analysis comprises the steps of: receiving a query for data from a database application, issuing the received query to a database management system, receiving a response to the query from the database management system, the response indicating a result dataset, creating or updating a database table that is suitable for trend analysis, and populating or updating the database table with data from the result dataset.

US Patent:

7121097, Oct 17, 2006

Filed:

Aug 29, 2001

Appl. No.:

09/942976

Inventors:

David K. Yee - Hayward CA, US
Marco A. Velasco - Modesto CA, US
Sarento G. Nickolas - San Jose CA, US
Ralph A. Dalla Betta - Mountain View CA, US

Assignee:

Catalytica Energy Systems, Inc. - Mountain View CA

International Classification:

F02C 7/22
F02C 7/26

US Classification:

60777, 60723, 60 39822

Abstract:

A control system for a catalytic combustion system on a gas turbine includes a flame preburner, a fuel injector positioned downstream of the preburner and a catalyst positioned downstream of the fuel injector. In such systems, a portion of the fuel combusts within the catalyst itself and the remainder of the fuel combusts in a homogeneous combustion process wave downstream of the catalyst. A sensor in communication with the control system monitors the homogeneous combustion process wave and adjusts the gas temperature at the catalyst inlet to a preferred value based on a predetermined schedule that relates the catalyst inlet gas temperature to operating fundamentals such as adiabatic combustion temperature or the gas turbine's exhaust gas temperature.

US Patent:

7152409, Dec 26, 2006

Filed:

Jan 16, 2004

Appl. No.:

10/758879

Inventors:

David K. Yee - Hayward CA, US
Dag Reppen - Chandler AZ, US

Assignee:

Kawasaki Jukogyo Kabushiki Kaisha - Kobe

International Classification:

F02C 9/00
F23R 3/40

US Classification:

60777, 60 39281, 60723, 431 7

Abstract:

According to one aspect, a method of controlling a multi-combustor catalytic combustion system is provided for determining a characteristic of a fuel-air mixture downstream of a preburner associated with a catalytic combustor and adjusting the fuel flow to the preburner based on the characteristic. The characteristic may include, for example, a measurement of the preburner or catalyst outlet temperature or a determination of the position of the homogeneous combustion wave in the burnout zone of the combustor.

US Patent:

7693732, Apr 6, 2010

Filed:

Jun 25, 2002

Appl. No.:

10/180747

Inventors:

Stefano Cei - Cupertino CA, US
Gregory Collins - Pacifica CA, US
Krishna Nekkalapudi - Cupertino CA, US
Ranga Polisetti - Union City CA, US
Daryl Porter - Danville CA, US
David Yee - Burlingame CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06Q 10/00

US Classification:

705 5

Abstract:

The present invention provides a computer implemented lab reservation system including a reservation engine and a reservation database. The reservation database contains data concerning the computer systems and target operating environments in the lab. The reservation engine manipulates the reservation database in order to efficiently match user requests to specific lab computer systems and target operating environments. The reservation system also manipulates the reservation database in order to efficiently configure computer systems and target operating environments. The reservation engine also manipulates the reservation database in order to efficiently reinstall computer system default settings, when users return configured systems, so that the computer systems can be reallocated to new requests.