John L Whitson

US Patent:

7650633, Jan 19, 2010

Filed:

Jan 4, 2007

Appl. No.:

11/619918

Inventors:

John Whitson - Waltham MA, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 17/30

US Classification:

726 6, 726 28, 726 18, 707 9, 709229

Abstract:

Generally speaking, systems, methods and media for automatically generating a role based access control model (RBAC) for an organizational environment with a role based access control system such as a hierarchical RBAC (HRBAC) system are disclosed. Embodiments may include a method for generating an RBAC model. Embodiments of the method may include accessing existing permissions granted to users of an organizational environment and analyzing the permissions to create permission characteristics. Embodiments of the method may also include performing cladistics analysis on the permission characteristics to determine role perspective relationships between individual users of the organizational environment. Embodiments of the method may also include generating an RBAC model based on the determined role perspective relationships between individual users of the organizational environment. Further embodiments of the method may include where generating the RBAC model includes generating a cladogram based on the determined role perspective relationships.

US Patent:

61714801, Jan 9, 2001

Filed:

Jun 21, 1999

Appl. No.:

9/337490

Inventors:

Phillip G. Lee - Galveston TX
Philip E. Turk - Galveston TX
John L. Whitson - Boston MA

Assignee:

Board of Regents, The University of Texas System - Austin TX

International Classification:

B01D 1712

US Classification:

210 85

Abstract:

The present invention relates to computer automated upflow bead filter systems. These systems typically include a bead bed; in situ sensors/transducers for monitoring dissolved oxygen, differential pressure across the filter, water flow, pH, oxidation-reduction potential or any combination of these; a control system, such as a computer, operably coupled to the in situ sensors/transducers; an influent conduit below the bead bed; and an effluent conduit above the bead bed. The in situ sensors/transducers convert monitored conditions to electrical signals and at least back washing or dissolved oxygen may be continually adjusted in accordance with the electrical signals using the control system. By virtue of the control system, water flow rate or residence time, backwash frequency, and backwash duration may be continually adjusted to optimize the operation of the filter.

US Patent:

59618310, Oct 5, 1999

Filed:

Jun 24, 1997

Appl. No.:

8/881718

Inventors:

Phillip G. Lee - Galveston TX
Philip E. Turk - Galveston TX
John L. Whitson - Boston MA

Assignee:

Board of Regents, The University of Texas System - Austin TX

International Classification:

B01D 1712
C02F 300
A01K 6100

US Classification:

210614

Abstract:

The present invention is an automated aquaculture system which comprises: one or more culture tanks connected to a closed system of filters and ultraviolet or ozone sources for water purification prior to returning water to the culture tanks. Also disclosed as part of the system are automated biofilters that automatically monitor water conditions in the system, and video cameras in the tanks that monitor growth and condition of the animals in the tank. This invention is also a process useful for culturing an aquatic species, using the disclosed systems. Preferred species include shrimp, squid, marine fishes and fingerlings and marine mollusks.

US Patent:

54826306, Jan 9, 1996

Filed:

Jun 20, 1994

Appl. No.:

8/263656

Inventors:

Phillip G. Lee - Galveston TX
Philip E. Turk - Galveston TX
John L. Whitson - Galveston TX

Assignee:

Board of Regents, The University of Texas System - Austin TX

International Classification:

C02F 330

US Classification:

210605

Abstract:

A process and system for the reduction of nitrate to nitrogen in a fluid medium. Anaerobic bacteria fed by a carbon source are used for nitrate reduction. The addition rate of the carbon source and process residence time are controlled using the oxidation-reduction potential of the fluid medium to achieve a desired level of nitrate reduction. An industrial process control system may be used to monitor inputs and control outputs. A column of suspended beads may be used as the anaerobic bacterial bed for denitrification.