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                                                                   Exhibit 25(b)




                             C E R T I F I C A T E




                     I, Jean M. Schmidt, do hereby certify that I am a duly
elected, qualified and acting Assistant Secretary of TRW Inc. ("TRW"), an Ohio
corporation; that attached hereto and marked as "Exhibit A" is a true and
correct copy of resolutions duly adopted by the Directors of TRW at a meeting
thereof duly called and held on February 8, 1995, at which meeting a quorum was
present and acting throughout; and that said resolutions have not been
modified, revoked or rescinded in any manner and are now in full force and
effect.

                     IN WITNESS WHEREOF, I have hereunto set my hand and have
caused the seal of TRW to be affixed hereto at Lyndhurst, Ohio this 24th day of
March, 1995.





                                              /s/ Jean M. Schmidt               
                                              -----------------------------
                                                     Assistant Secretary





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                                                                       EXHIBIT A





RESOLVED that any officer or assistant officer of the Corporation is authorized
and empowered, for and on behalf of the Corporation, to prepare or cause to be
prepared, to execute and to file with the Securities and Exchange Commission,
Washington, D. C. (the "Commission"), the Corporation's Annual Report on Form
10-K for the year ended December 31, 1994, such other periodic reports as may
be required pursuant to the Securities Exchange Act of 1934, as amended (the
"Act"), amendments and exhibits to any of the foregoing and any and all other
documents to be filed with the Commission or elsewhere pertaining to such
reports, and to take such other action as may be necessary and appropriate to
effect the filing of all such reports under the Act, including the execution of
a power of attorney evidencing the authority set forth herein; and

FURTHER RESOLVED that Walter S. Page, III and J. Lawrence Manning, Jr. and each
of them is appointed an attorney for the Corporation, with full power of
substitution and resubstitution, to execute and file, for and on behalf of the
Corporation, such Annual Report on Form 10-K, such other periodic reports,
amendments and exhibits to any of the foregoing and any and all other documents
to be filed with the Commission or elsewhere pertaining to such reports, with
full power and authority to take or cause to be taken all other actions which
in the judgment of such person may be necessary and appropriate to effect the
purposes of the foregoing resolution.