Exhibit 10(c)


THIS NOTE AND THE COMMON SHARES  ISSUABLE UPON  CONVERSION OF THIS NOTE HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED.  THIS NOTE AND THE
COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE MAY NOT BE SOLD, OFFERED FOR
SALE,  PLEDGED  OR  HYPOTHECATED  IN THE  ABSENCE OF AN  EFFECTIVE  REGISTRATION
STATEMENT  AS TO THIS NOTE UNDER  SAID ACT OR AN  OPINION OF COUNSEL  REASONABLY
SATISFACTORY TO ARTERA GROUP, INC. THAT SUCH REGISTRATION IS NOT REQUIRED.


                            SECURED CONVERTIBLE NOTE

     FOR VALUE RECEIVED, ARTERA GROUP, INC., a Delaware corporation (hereinafter
called "Borrower"),  hereby promises to pay to ALPHA CAPITAL AKTIENGESELLSCHAFT,
Pradafant 7, 9490 Furstentums,  Vaduz,  Lichtenstein,  Fax: 011-42-32323196 (the
"Holder") or order,  without demand,  the sum of Five Hundred and Fifty Thousand
Dollars  ($550,000.00),  with simple interest accruing at the annual rate of 8%,
on January 10, 2004 (the "Maturity Date").

                  The following terms shall apply to this Note:

                                    ARTICLE I
                           DEFAULT RELATED PROVISIONS

     1.1 Payment  Grace  Period.  The  Borrower  shall have a ten (10) day grace
period to pay any monetary amounts due under this Note, after which grace period
a default  interest rate of eighteen  percent (18%) per annum shall apply to the
amounts owed hereunder.

     1.2 Interest Rate. Interest payable on this Note shall accrue at the annual
rate of eight  percent  (8%) and be payable on each annual  anniversary  of this
Note or sooner,  and on the Maturity Date,  accelerated  or otherwise,  when the
principal and remaining accrued but unpaid interest shall be due and payable, or
sooner as described below.

                                   ARTICLE II
                                CONVERSION RIGHTS

The Holder  shall have the right to convert  the  principal  due under this Note
into shares of common stock of NCT Group, Inc., a Delaware  corporation ("NCT"),
as described in a subscription  agreement  entered into by Borrower,  Holder and
NCT ("Subscription Agreement"), the terms of which are incorporated herein.

                                   ARTICLE III
                                EVENT OF DEFAULT

     The  occurrence  of any of the  following  events  of  default  ("Event  of
Default") shall, at the option of the Holder hereof,  make all sums of principal
and  interest  then  remaining  unpaid  hereon  and all  other  amounts  payable
hereunder  immediately due and payable,  upon demand,  without  presentment,  or
grace  period,  all of which hereby are  expressly  waived,  except as set forth
below:

     3.1 Failure to Pay  Principal  or Interest.  The Borrower  fails to pay any
installment of principal or interest hereon when due and such failure  continues
for a period  of ten (10)  days  after  the due  date.  The ten (10) day  period
described  in this  Section  3.1 is the same ten (10) day  period  described  in
Section 1.1 hereof.

     3.2 Breach of  Covenant.  The Borrower  breaches  any material  covenant or
other term or condition of this Note in any material respect and such breach, if
subject to cure,  continues for a period of seven (7) days after written  notice
to the Borrower from the Holder.

     3.3 Breach of Representations and Warranties.  Any material  representation
or warranty of the Borrower made herein, in the Subscription Agreement or in any
agreement,  statement  or  certificate  given in writing  pursuant  hereto or in
connection  therewith shall be false or misleading in any material respect as of
the date made and the Closing Date (as defined in the Subscription Agreement).

     3.4 Receiver or Trustee.  The  Borrower  shall make an  assignment  for the
benefit of creditors,  or apply for or consent to the  appointment of a receiver
or trustee for it or for a substantial part of its property or business; or such
a receiver or trustee shall otherwise be appointed.

     3.5 Judgments.  Any money judgment,  writ or similar final process shall be
entered or filed  against  Borrower or any of its property or other assets after
the  date of this  Note for more  than  $50,000,  and  shall  remain  unvacated,
unbonded or unstayed for a period of sixty (60) days.

     3.6  Bankruptcy.  Bankruptcy,  insolvency,  reorganization  or  liquidation
proceedings  or other  proceedings or relief under any bankruptcy law or any law
for the relief of debtors  shall be instituted by or against the Borrower and if
instituted against Borrower are not dismissed within 75 days of initiation.

     3.7 Failure to Deliver Common Stock or Replacement Note. Borrower's failure
to  timely  deliver  Common  Stock  to the  Holder  pursuant  to and in the form
required  by this  Note  and  Section  9 of the  Subscription  Agreement,  or if
required a replacement Note.

     3.8 Non-Registration  Event. The occurrence of a Non-Registration  Event as
described in Section 10.4 of the Subscription Agreement.

     3.9 Cross Default. A default by the Borrower of a material term,  covenant,
warranty or undertaking of any other  agreement to which the Borrower and Holder
are parties,  or the  occurrence  of a material  event of default under any such
other agreement.

                                   ARTICLE IV
                                  MISCELLANEOUS

     4.1 Failure or  Indulgence  Not Waiver.  No failure or delay on the part of
Holder hereof in the exercise of any power,  right or privilege  hereunder shall
operate as a waiver  thereof,  nor shall any single or partial  exercise  of any
such power,  right or privilege preclude other or further exercise thereof or of
any other right, power or privilege.  All rights and remedies existing hereunder
are  cumulative  to, and not  exclusive  of, any  rights or  remedies  otherwise
available.

     4.2 Notices.  Any notice herein  required or permitted to be given shall be
in writing and may be personally  served or sent by fax transmission  (with copy
sent by regular,  certified or registered mail or by overnight courier). For the
purposes hereof, the address and fax number of the Holder is as set forth on the
first page  hereof.  A Conversion  Notice  shall be deemed  delivered on (i) the
business  day it is received by  facsimile  or otherwise by the Borrower if such
notice is received  prior to 11:00 A.M. New York time,  or (ii) the  immediately
succeeding  business day if it is received by facsimile or otherwise after 11:00
A.M.  New York  time on a  business  day or at any time on a day  which is not a
business day. The address and fax number of the Borrower  shall be Artera Group,
Inc., 20 Ketchum Street,  Westport,  CT 06880,  attn:  Chief Financial  Officer,
telecopier  number:  (203) 226-4338,  with a copy by telecopier only to: General
Counsel.  Both  Holder and  Borrower  may change the  address and fax number for
service  by  service  of  notice  to the  other as  herein  provided.  Notice of
Conversion  shall be deemed  given  when  made to the  Company  pursuant  to the
Subscription Agreement.

     4.3 Amendment Provision. The term "Note" and all reference thereto, as used
throughout this instrument,  shall mean this instrument as originally  executed,
or if later amended or supplemented, then as so amended or supplemented.

     4.4  Assignability.  This Note shall be binding  upon the  Borrower and its
successors  and  assigns,  and shall  inure to the benefit of the Holder and its
successors and assigns, and may be assigned by the Holder.

     4.5 Cost of  Collection.  If default  is made in the  payment of this Note,
Borrower shall pay the Holder hereof  reasonable costs of collection,  including
reasonable attorneys' fees.

     4.6  Governing  Law.  This  Note  shall be  governed  by and  construed  in
accordance  with the laws of the State of New York. Any action brought by either
party  against  the  other  concerning  the  transactions  contemplated  by this
Agreement  shall  be  brought  only in the  state  courts  of New York or in the
federal courts located in the state of New York. Both parties and the individual
signing  this  Agreement  on  behalf  of the  Borrower  agree to  submit  to the
jurisdiction of such courts.  The prevailing  party shall be entitled to recover
from the other party its reasonable attorney's fees and costs.

     4.7 Maximum Payments. Nothing contained herein shall be deemed to establish
or require the  payment of a rate of interest or other  charges in excess of the
maximum  permitted  by  applicable  law.  In the event that the rate of interest
required to be paid or other charges  hereunder exceed the maximum  permitted by
such law,  any  payments in excess of such  maximum  shall be  credited  against
amounts owed by the Borrower to the Holder and thus refunded to the Borrower.

     4.8  Prepayment.  This Note may not be paid prior to the  Maturity  Date or
after the occurrence of an Event of Default without the consent of the Holder.

     IN WITNESS WHEREOF,  Borrower has caused this Note to be signed in its name
by its duly authorized officer as of the 10th day of January, 2002.

                            ARTERA GROUP, INC.


                            By:________________________________
                                     Name:
                                     Title:





                              NOTICE OF CONVERSION

     (To be executed by the registered Holder in order to convert the Note)


     The  undersigned  hereby elects to convert  $_________ of the principal and
$_________  of the  interest  due on the Note  issued by ARTERA  GROUP,  INC. on
January 10, 2002 into shares of common stock of NCT GROUP, INC. according to the
conditions set forth in such Note, as of the date written below.



Date of Conversion:_____________________________________________________________


Conversion Price:_______________________________________________________________


Shares To Be Delivered:_________________________________________________________


Signature:______________________________________________________________________


Print Name:_____________________________________________________________________


Address:________________________________________________________________________

        ________________________________________________________________________