*********************************************************
   *                                                       *
   * Dear Sir or Madam,                                    *
   *                                                       *
   * My e-mail address has  been  changed.  The new one is *
   * the following:                                        *
   *                                                       *
   *                                *
   *                                                       *
   * If you sent me mails after 10 February 1997 I have to *
   * ask you send these to my new  address again.  I  look *
   * forward to hearing from you as soon as possible.      *
   *                                                       *
   *********************************************************


Sincerely,

                **********************************************
                *             Gasparics, Antal               *
                *             (M. of El. Eng.)               *
                **********************************************
                *      Technical University of Budapest      *
                *    Department of Electromagnetic Theory    *
                *--------------------------------------------*
                *           E-mail:   *
                *             Tel.: +36-1-463-3190           *
                *             Fax.: +36-1-463-3189           *
                *============================================*
                *       Hungarian Academy of Sciences        *
                *   Central Research Institute for Physics   *
                * Research Institute for Materials Sciences  *
                *--------------------------------------------*
                *           E-mail:     *
                *             Tel.: +36-1-169-9499 /23-69    *
                *             Fax.: +36-1-155-0694           *
                **********************************************

*********************************************************
   *                                                       *
   * Dear Sir or Madam,                                    *
   *                                                       *
   * My e-mail address has  been  changed.  The new one is *
   * the following:                                        *
   *                                                       *
   *                                *
   *                                                       *
   * If you sent me mails after 10 February 1997 I have to *
   * ask you send these to my new  address again.  I  look *
   * forward to hearing from you as soon as possible.      *
   *                                                       *
   *********************************************************


Sincerely,

                **********************************************
                *             Gasparics, Antal               *
                *             (M. of El. Eng.)               *
                **********************************************
                *      Technical University of Budapest      *
                *    Department of Electromagnetic Theory    *
                *--------------------------------------------*
                *           E-mail:   *
                *             Tel.: +36-1-463-3190           *
                *             Fax.: +36-1-463-3189           *
                *============================================*
                *       Hungarian Academy of Sciences        *
                *   Central Research Institute for Physics   *
                * Research Institute for Materials Sciences  *
                *--------------------------------------------*
                *           E-mail:     *
                *             Tel.: +36-1-169-9499 /23-69    *
                *             Fax.: +36-1-155-0694           *
                **********************************************