IAEA0975 ACORNS.

ACORNS, Covariance and Correlation Matrix Diagonalization

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: ACORNS.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.

Program name	Package id	Status	Status date
ACORNS	IAEA0975/01	Tested	27-AUG-1990

Machines used:

Package ID	Orig. computer	Test computer
IAEA0975/01	IBM PC	IBM PC

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3. DESCRIPTION OF PROGRAM OR FUNCTION

The program allows the user to verify the different types of covariance/correlation matrices used in the activation neutron spectrometry.

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4. METHOD OF SOLUTION

The program performs the diagonalization of the input covariance/relative covariance/correlation matrices. The eigen values are then analyzed to determine the rank of the matrices. If the eigen vectors of the pertinent correlation matrix have also been calculated, the program can perform a complete factor analysis (generation of the factor matrix and its rotation in Kaiser's 'varimax' sense to select the origin of the correlations).

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Matrix size is limited to 60 on PDP and to 100 on IBM PC/AT.

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6. TYPICAL RUNNING TIME: The program is run interactively.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
IAEA0975/01	27-AUG-1990	Tested at NEADB

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10. REFERENCES:

IAEA0975/01, included references:

- E.J. Szondi:
  Update to the Program Package ACORNS.
  INT, Technical University of Budapest (June 1, 1988)
  including extract from INDC(NDS)-192/L pages 66-67 (January 1988)

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11. MACHINE REQUIREMENTS:

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
IAEA0975/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

PDP 11/23: RSX-11M or
           RSX-11M-PLUS
IBM PC:    DOS 3.20 or
           DOS 3.30

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

          E.J. Szondi
          Technical University of Budapest
          Institute of Nuclear Technics
          Muegyetem rkp. 9
          H-1521 Budapest

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16. MATERIAL AVAILABLE

IAEA0975/01

File name	File description	Records
IAEA0975_01.001	Information file	70
IAEA0975_01.002	How to Use (original)	83
IAEA0975_01.003	ACORNS source program (FORTRAN)	1137
IAEA0975_01.004	JCL to install on PDP 11/23	4
IAEA0975_01.005	JCL to install on IBM/PC (original)	3
IAEA0975_01.006	Test case input data	12
IAEA0975_01.007	Test case output log	999
IAEA0975_01.008	Input spectrum energy scale	5
IAEA0975_01.009	Input spectrum covariance data	30
IAEA0975_01.010	Input spectrum covariance data	30
IAEA0975_01.011	ACORNS .EXE file	0
IAEA0975_01.012	DOS file-names	11

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17. CATEGORIES

O. Experimental Data Processing
P. General Mathematical and Computing System Routines

Keywords: activation analysis, correlations, covariance matrices.