Patents by Inventor Dachuan Yu

Dachuan Yu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20090140576
    Abstract: A hybrid power system is disclosed. The hybrid power system may include a primary power source configured to provide a primary power, and an energy storage device coupled to the primary power source, the energy storage device configured to store excess primary power provided by the primary power source. The hybrid power system may further include a variable speed genset, the variable speed genset including a secondary power source configured to operate at a variable rotor speed to provide a secondary power responsive to power requirements of a load. The hybrid power system may also include a central controller communicatively coupled to the primary power source, the energy storage device, and the variable speed genset, the central controller configured to control the primary power source, the energy storage device, and the variable speed genset based on the power requirements of the load.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 4, 2009
    Inventors: Dachuan Yu, Michael Parry Liechty, Mahesh Sitaram Illindala, Matthew Thomas Muller
  • Publication number: 20090125976
    Abstract: A method and apparatus is disclosed herein for automated test input generation for web applications.
    Type: Application
    Filed: October 10, 2008
    Publication date: May 14, 2009
    Applicant: DOCOMO COMMUNICATIONS LABORATORIES USA, INC.
    Inventors: Gary Wassermann, Dachuan Yu, Ajay Chander, Dinakar Dhurjati, Hiroshi Inamura
  • Publication number: 20090019525
    Abstract: A method and apparatus is disclosed herein for secure server-side programming. In one embodiment, the method comprises creating a server-side program with one or more abstractions and compiling the server-side program by translating the server-side program, including the one or more abstractions, into target code that is guaranteed to execute in a secure manner with respect to a security criteria.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 15, 2009
    Inventors: Dachuan Yu, Ajay Chander, Hiroshi Inamura, Igor Serikov
  • Publication number: 20080083012
    Abstract: A method and apparatus is disclosed herein for constraining the behavior of embedded script in documents using program instrumentation. In one embodiment, the method comprises downloading a document with a script program embedded therein, inspecting the script program, and rewriting the script program to cause behavior resulting from execution of the script to conform to one or more policies defining safety and security. The script program comprises self-modifying code (e.g., dynamically generated script).
    Type: Application
    Filed: June 20, 2007
    Publication date: April 3, 2008
    Inventors: Dachuan Yu, Ajay Chander, Nayeem Islam
  • Publication number: 20080072323
    Abstract: A method and apparatus is disclosed for performing information flow enforcement for assembly code. In one embodiment, the method comprises receiving assembly code having timing annotations with type information that enforce information flow with respect to one or more of timing-related covert and concurrent channels when statically checked as to whether the code is in violation of a security policy and performing verification with respect to information flow for the assembly code based on a security policy.
    Type: Application
    Filed: August 16, 2007
    Publication date: March 20, 2008
    Inventor: Dachuan Yu
  • Publication number: 20070107057
    Abstract: A method and apparatus is disclosed herein for detecting and preventing unsafe behavior of script programs. In one embodiment, a method comprises performing static analysis of a script program based on a first safety policy to detect unsafe behavior of the scrip program and preventing execution of the script program if a violation of the safety policy would occur when the script program is executed.
    Type: Application
    Filed: November 7, 2006
    Publication date: May 10, 2007
    Inventors: Ajay Chander, Dachuan Yu
  • Publication number: 20060143689
    Abstract: A method, article of manufacture and apparatus for performing information flow enforcement are disclosed. In one embodiment, the method comprises receiving securely typed native code and performing verification with respect to information flow for the securely typed native code based on a security policy.
    Type: Application
    Filed: December 19, 2005
    Publication date: June 29, 2006
    Inventors: Dachuan Yu, Nayeem Islam