Nancy L Feldman

US Patent:

60555610, Apr 25, 2000

Filed:

Sep 30, 1997

Appl. No.:

8/941422

Inventors:

Nancy Karen Feldman - Nanuet NY
Arun Viswanathan - White Plains NY
Richard M. Woundy - North Reading MA
Richard H. Boivie - Monroe CT

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1516

US Classification:

709200

Abstract:

IP based networks use a number of different IP routing protocols to determine how packets ought to be routed. However, due to the rapid growth of the Internet, there is a great need for higher packet forwarding performance. This invention describes a way to map IP routing information onto a technology that uses label switching and swapping, such as ATM, without the need to change the network paradigm. This allows a network to continue to function and appear as a standard IP network, but with much higher performance. In this invention, an Integrated Switch Router (ISR), is a switch that has been augmented with standard IP routing support. The ISR at an entry point to the switching environment performs standard IP forwarding of datagrams, but the "next hop" of the IP forwarding table has been extended to include a reference to a switched path (for example, the VCC in ATM technology). Each switched path may have an endpoint at a neighboring router (comparable to existing IP next hops on conventional routers), or may traverse a series of ISRs along the best IP forwarding path, to an ISR endpoint. This allows datagrams to be switched at hardware speeds through an entire ISR network.

US Patent:

61308897, Oct 10, 2000

Filed:

Sep 30, 1997

Appl. No.:

8/941421

Inventors:

Nancy Karen Feldman - Nanuet NY
Arun Viswanathan - White Plains NY
Richard M. Woundy - North Reading MA
Richard H. Boivie - Monroe CT

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 1228

US Classification:

370397

Abstract:

This invention discloses a way to map IP or similar routing information onto a technology that uses label switching and swapping, such as ATM, without the need to change the network paradigm. This allows a network to continue to function and appear as a standard IP network, but with much higher performance. One of the requirements of IP networks is to decrement the IP packet Time-To-Live (TTL) field on each hop it traverses. Currently, switched packets within an ATM like network cannot decrement the TTL. This invention can decrement packet TTLs appropriately by maintaining a hop-count per each switched path. This hop-count maintains the total number of hops a packets would have traversed, had it been forwarded in the IP hop-by-hop model, rather than through the ATM like switched path. Before forwarding a packet on a switched path, an ingress ISR decrements the TTL by the hop-count. In this way, at the switched path exit point, the TTL is the same as if it had been forwarded by IP.

US Patent:

46938664, Sep 15, 1987

Filed:

Jan 9, 1987

Appl. No.:

7/001617

Inventors:

Nancy A. Feldman - Philadelphia PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23F 1106

US Classification:

422 13

Abstract:

Methods for chemically scavenging oxygen from an aqueous medium are disclosed. Linear, water soluble polyethyleneamines, such as pentaethylenehexamine, are added, as the sole oxygen scavenger, to the desired aqueous medium. Suitable environments for use of these amines comprise boiler feedwater and boiler steam condensate systems.

US Patent:

61480002, Nov 14, 2000

Filed:

Sep 30, 1997

Appl. No.:

8/941427

Inventors:

Nancy Karen Feldman - Nanuet NY
Arun Viswanathan - White Plains NY
Richard M. Woundy - North Reading MA
Richard H. Boivie - Monroe CT

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 1228

US Classification:

370397

Abstract:

A switching apparatus (and method and program storage device for storing the method) for receiving and transmitting data units each segmented into a series of cells of data, including a first cell and a last cell, each cell of a series including a label common to all cells of said series, includes at least one incoming port for receiving cells of a plurality of series at each incoming port, at least one outgoing port for transmitting cells out of the apparatus with an outbound label, a storage device for storing a series of cells received at each incoming port until the last cell of the series is received, and, a device for transmitting each of the series of cells sequentially from the first cell to the last cell from the storage device to a selected outgoing port. Each cell of each series has an outbound label common to all cells of the series, and all cells of each of the series are transmitted before transmitting any cells of other series having the same outbound label.

US Patent:

60698896, May 30, 2000

Filed:

Sep 30, 1997

Appl. No.:

8/941426

Inventors:

Nancy Karen Feldman - Nanuet NY
Arun Viswanathan - White Plains NY
Richard M. Woundy - North Reading MA
Richard H. Boivie - Monroe CT

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 1228

US Classification:

370351

Abstract:

In networks that use the label switching paradigm, labels are typically allocated to a "flow", where a flow is identified as an end-to-end connection between two or more user applications. This approach may quickly lead to exhaustion of the label space, because the number of user connections across a network is unbounded and hence can be too numerous. Moreover, this requires that the setup and teardown procedures be exercised for each user connection. This demands large amounts of resources (in terms of labels, memory and processing) from the network devices. An important objective of this inventive proposal is to reduce the consumption of labels in a network. Several methods are identified through which multiple flows that traverse the same network hops can use a single connection through the network to transport data from the ingress to the egress point of a network. In other words, the flows are "aggregated" onto a single connection from an ingress to an egress point of a network. Consequently, this helps in reducing the labels usage by several degrees and similarly the setup and teardown work by the same order.

US Patent:

46577408, Apr 14, 1987

Filed:

Nov 21, 1984

Appl. No.:

6/673693

Inventors:

Nancy A. Feldman - Philadelphia PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23F 1106

US Classification:

422 13

Abstract:

Methods for chemically scavenging oxygen from an aqueous medium comprising the addition of linear, water soluble polyethyleneamines, such as tetraethylenepentamine and triethylenetetramine, as the sole oxygen scavenger, to the desired aqueous medium. Suitable environments for use of these amines comprise boiler feedwater and boiler steam condensate systems.

US Patent:

48835668, Nov 28, 1989

Filed:

Jun 7, 1988

Appl. No.:

7/203779

Inventors:

John A. Muccitelli - Feasterville PA
Nancy A. Feldman - Trevose PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

G01N 2702
G01N 2726

US Classification:

204 1T

Abstract:

An electrode assembly and a method of electrically insulating the electrode assembly for in-situ measurement of electrolytic conductivity of boiler or other hot alkaline or neutral water, the electrode assembly comprising calcia/hafnia stabilized zirconia wherein the calcia is present from 3 to 10% by weight and the hafnia is present from 0. 5 to 6% by weight.

US Patent:

50193422, May 28, 1991

Filed:

Oct 25, 1989

Appl. No.:

7/427287

Inventors:

John A. Muccitelli - Feasterville PA
Nancy A. Feldman - Trevose PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23F 1106

US Classification:

422 16

Abstract:

The present invention utilizes low volatility amines or alkanol amines to control caustic corrosion which can take place when a boiler system, treated with a coordinated phosphate/pH program, is "out of control". N-substituted hydroxyalkyl piperazines are also capable of mitigating caustic corrosion in coordinated phosphate/pH programs. Combinations of the compounds of the present invention and phosphate have also been shown to be efficacious at mitigating caustic corrosion in coordinated phosphate/pH programs.