Zheng Haiyan Liu

US Patent:

6745340, Jun 1, 2004

Filed:

Jan 11, 2001

Appl. No.:

09/758814

Inventors:

Zheng Henry Liu - Tucson AZ
Pamela Lynn Glenn - Tucson AZ

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1100

US Classification:

714 5, 714 6, 714 15, 707202

Abstract:

A file recovery logic implemented within a data processing system is disclosed that recovers data from a file on a write once read many (WORM) medium when the file cannot be accessed due to the damage to both the hash and hierarchical directory entries. The file recovery logic controls access to the WORM medium and also access to a target medium via optical devices that enable read from the WORM medium and write to the target medium. The file recovery logic scans each logical sector of the WORM mediums data surface and identifies a location of a data header sector that corresponds to the unaccessible file. In the preferred embodiment, identification of the data header sector is completed by analyzing only the first few bytes of the sector. Upon location of the header sector, a new file is opened in a target medium and the data from contiguous sectors on the WORM medium beginning at the data header sector are retrieved and written to the new file on the target medium. The scanning, retrieving, and writing continue until a next header, a tail, or a blank sector is encountered, or the last sector on the mediums scanning range is reached.

US Patent:

20170204133, Jul 20, 2017

Filed:

Jun 17, 2015

Appl. No.:

15/313139

Inventors:

- Brentford, Middlesex, GB
Animesh GOSWAMI - New Brunswick NJ, US
Zhiwei GUO - Sammamish WA, US
Thomas P. TULLY - New Brunswick NJ, US
Jacob SWIDORSKI - Wallingford CT, US
Zheng LIU - Wallingford CT, US
Nicholas A. MEANWELL - Wallingford CT, US

International Classification:

C07J 63/00
C07J 71/00

Abstract:

Compounds having drug and bio-affecting properties, their pharmaceutical compositions and methods of use are set forth. In particular, betulinic acid derivaties that possess unique antiviral activity are provided as HIV maturation inhibitors, as represented by compounds of Formulas I, II and III:These compounds are useful for the treatment of HIV and AIDS.