International Business Machines Corporation

Kenneth L Greenlee

Christian Lee Hunt

Anne I Ryan

Steven Michael Miller

Donnie Allen Smith, Jr

Thomas T Hanis

Sunil Kumar Mishra

Mukesh Kumar

Venkatapathi Rao Kaka

Sahil Arora

A method, system and computer program product for determining changes to database tables. In an embodiment, the method comprises loading a first group of records in a first time period in a database; loading a second group of records in a second time period in the database; selecting one or more of the records in the database; and for each of the selected records, determining whether it was loaded into the database during the first time period or the second time period, and providing the each record with a specified designation based on the time period during which the each record was loaded into the database. In an embodiment, identified times when the records were loaded in the database are used to determine the time period during which the each record was loaded in the database.

Determining additions, deletions and updates to database tables

Data synchronization includes receiving an update request from a client system for a first record set, wherein the update request includes search criteria used to initially determine the first record set and hash summaries of records of the first record set, and searching a data storage device for records matching the search criteria. The searching generates a second record set of records having hash summaries. Record identifiers of records of the second record set may be compared with record identifiers of the hash summaries of the first record set. Responsive to determining that a record identifier of a selected hash summary of the first record set matches a record identifier of a record of the second record set, a determination may be made whether hash fields of the selected hash summaries mismatch and, responsive to determining a mismatch between hash fields, a field of the record of the second record set represented by the mismatched hash fields may be sent to the client system without sending fields of record determined to match.

Record property synchronization in a network computing system

The present invention discloses an active data tag device () which includes an expiration event generator (), and a memory () which has tag data () stored therein. Upon the occurrence () of and expiration event, the tag disables access to the tag data.

Method and apparatus for triggering expiration of a data tag device

Devices, systems, processes, and articles of manufacture are provided herein. These may include an RFID transponder having a microprocessor, nonvolatile memory, a battery, and an antenna, wherein the microprocessor is configured to operate in a passive mode and a battery operated mode, and wherein, when in the passive mode only a portion of the microprocessor may be powered by energy received from an RFID reader interrogating the RFID transponder. The RFID transponder may further include MEMS sensors coupled to the microprocessor and the microprocessor may be further configured to add physical data, instructions, or a unique identifier of the RFID transponder to the nonvolatile memory.

Active/passive RFID transponder control function

The present invention discloses a data tag device () which initially operates in either an active mode or a semi-active mode (). The data tag device includes tag circuitry including a interface element (), a controller element (), and a memory () in which tag data () is stored. A battery is provided which is initially coupled to the tag circuitry. A decoupling feature () is used to destructively decouple the battery from the tag circuitry when it is desired to disable the data tag device and reduce the ability of third parties to obtain the tag data. The data tag device is configured to detect the destructive decoupling (), and disable the data tag in response.

Method and apparatus for disabling a data tag device

The present invention discloses a data tag device () which initially operates in a passive mode where the tag responds to queries (). While operating passively, an expiration event occurs () which causes the tag to disable a battery (), preventing subsequent operation in the passive mode, resulting in the tag disabling access to the tag data.

Method and apparatus for self-expiration of a passive data tag device

The present invention discloses a data tag device () which initially operates in an active mode where the tag occasionally transmits an unsolicited beacon (). While operating, an expiration event occurs () which causes the tag to disable a battery (), preventing subsequent operation in an active mode, but may continue operating in a passive mode.

Method and apparatus for disabling active mode operation of a data tag device

The present invention discloses a data tag device () which initially operates in an active mode (). The data tag device includes tag circuitry including a interface element (), a controller element (), and a memory () in which tag data () is stored. A battery () is provided which is initially coupled to the tag circuitry by a connector means () which allows non-destructive removal and replacement of the battery. The data tag device is configured to detect the removal of the battery (), and disable the data tag in response ().

Growing community of inventors

Raleigh, NC, United States of America

Kenneth L Greenlee