FREDERICK ALLEN POWERS
Pilots at Longfellow Rd, North Sudbury, MA
License number
Massachusetts A1522111
Issued Date
Feb 2017
Expiration Date
Feb 2019
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
131 Longfellow Rd, North Sudbury, MA 01776
Professional information
Data Management System For Building A Database With Multi-Dimensional Search Tree Nodes
US Patent:
5442784, Aug 15, 1995
Filed:
Jun 17, 1993
Appl. No.:
8/078396
Inventors:
Frederick A. Powers - Sudbury MA
Stanley R. Zanarotti - Cambridge MA
Stanley R. Zanarotti - Cambridge MA
Assignee:
Dimensional Insight, Inc. - Burlington MA
International Classification:
G06F 1730
US Classification:
395600
Abstract:
The subject invention is directed to a database system for organizing large amounts of data to be accessed by a digital computer. More particularly, a free form type database, in the form of a summarized, multikey tree, is built from files stored on the computer. After a building operation, the user obtains specified information by using the summarized database. Information in the files is divided into three categories; that is, a dimension field which comprises data to be organized, a summary field which comprises a numeric quantity on which calculations can be performed, and a non-summary field which comprises other information associated with an input record. The internal nodes of the tree summarize and organize sets of input records. Methods are provided for reducing the amount of storage space used by cutting off the tree when the size of sets go below a given threshold, and sharing parts of the tree so that each record does not appear n! times in the database.
Database System With Multi-Dimensional Summary Search Tree Nodes For Reducing The Necessity To Access Records
US Patent:
5257365, Oct 26, 1993
Filed:
Mar 16, 1990
Appl. No.:
7/495360
Inventors:
Frederick A. Powers - Sudbury MA
Stanley R. Zanarotti - Cambridge MA
Stanley R. Zanarotti - Cambridge MA
International Classification:
G06F 1540
US Classification:
395600
Abstract:
The subject invention is directed to a database system for organizing large amounts of data to be accessed by a digital computer. More particularly, a free form type database, in the form of a summarized, multikey tree, is built from files stored on the computer. After a building operation, the user obtains specified information by using the summarized database. Information in the files is divided into three categories; that is, a dimension field which comprises data to be organized, a summary field which comprises a numeric quantity on which calculations can be performed, and a non-summary field which comprises other information associated with an input record. The internal nodes of the tree summarize and organize sets of input records. Methods are provided for reducing the amount of storage space used by cutting off the tree when the size of sets go below a given threshold, and sharing parts of the tree so that each record does not appear n! times in the database.
Method For Building A Database With Multi-Dimensional Search Tree Nodes
US Patent:
5404513, Apr 4, 1995
Filed:
Jun 17, 1993
Appl. No.:
8/079249
Inventors:
Frederick A. Powers - Sudbury MA
Stanley R. Zanarotti - Cambridge MA
Stanley R. Zanarotti - Cambridge MA
Assignee:
Dimensional Insight, Inc. - Burlington MA
International Classification:
G06F 1540
US Classification:
395600
Abstract:
The subject invention is directed to a database system for organizing large amounts of data to be accessed by a digital computer. More particularly, a free form type database, in the form of a summarized, multikey tree, is built from files stored on the computer. After a building operation, the user obtains specified information by using the summarized database. Information in the files is divided into three categories; that is, a dimension field which comprises data to be organized, a summary field which comprises a numeric quantity on which calculations can be performed, and a non-summary field which comprises other information associated with an input record. The internal nodes of the tree summarize and organize sets of input records. Methods are provided for reducing the amount of storage space used by cutting off the tree when the size of sets go below a given threshold, and sharing parts of the tree so that each record does not appear n! times in the database.
Method For Accessing A Database With Multi-Dimensional Search Tree Nodes
US Patent:
5404512, Apr 4, 1995
Filed:
Jun 17, 1993
Appl. No.:
8/079248
Inventors:
Frederick A. Powers - Sudbury MA
Stanley R. Zanarotti - Cambridge MA
Stanley R. Zanarotti - Cambridge MA
Assignee:
Dimensional Insight, Inc. - Burlington MA
International Classification:
G06F 1540
US Classification:
395600
Abstract:
The subject invention is directed to a database system for organizing large amounts of data to be accessed by a digital computer. More particularly, a free form type database, in the form of a summarized, multikey tree, is built from files stored on the computer. After a building operation, the user obtains specified information by using the summarized database. Information in the files is divided into three categories; that is, a dimension field which comprises data to be organized, a summary field which comprises a numeric quantity on which calculations can be performed, and a non-summary field which comprises other information associated with an input record. The internal nodes of the tree summarize and organize sets of input records. Methods are provided for reducing the amount of storage space used by cutting off the tree when the size of sets go below a given threshold, and sharing parts of the tree so that each record does not appear n! times in the database.