S MUKHOPADHYAY

A BASURAY

A K DATTA

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

New technique of arithmetic operation using the positional residue system.

Applied Optics

Based on the negabinary number representation, parallel one–step arithmetic operations (that is, addition and subtraction), logical operations, and matrix–vector multiplication on data have been optically implemented, by use of a two–dimensional spatial-encoding technique. For addition and subtraction, one of the operands in decimal form is converted into the unsigned negabinary form, whereas the other decimal number is represented in the signed negabinary form. The result of operation is obtained in the mixed negabinary form and is converted back into decimal. Matrix–vector multiplication for unsigned negabinary numbers is achieved through the convolution technique. Both of the operands for logical operation are converted to their signed negabinary forms. All operations are implemented by use of a unique optical architecture. The use of a single liquid-crystal–display panel to spatially encode the input data, operational kernels, and decoding masks have simplified the architecture as well as reduced the cost and complexity. © 2002 Optical Society of America.

Signedâ€“negabinaryâ€“arithmeticâ€“based optical computing by use of a single liquidâ€“crystalâ€“display panel

An optical technique is proposed where addition and subtraction of binary numbers are computed via an iterative process involving a modified method of carry-look-ahead addition. Binary numbers in coded form, are represented on spatial light modulators (SLM) and processed with the help of optical components. The sum is finally recorded on a photodetector array. The basic module is duplicated for each pair of numbers to be added/subtracted and carryless data parallelism is maintained throughout the iterative processing. © 1995.

Optics Communications

Parallel arithmetic operations in an optical architecture using a modified iterative technique

A review of the contemporary issues in optical computing is presented. The optical systems and techniques which are used to implement different functional sub units of a digital computer are elaborated. Several architectures that are being explored for digital optical computing are described. Some issues relating to organisational and functional aspects of optical computing, such as cellular automata, symbolic substitution, optical artificial discussed. © 1995 Taylor & Francis Group, LLC.

IETE Technical Review (Institution of Electronics and Telecommunication Engineers, India)

Optical computing techniques

Letters to the editor: New coding scheme for addition and subtraction using the modified signed-digit number representation in optical computation

Optical processing with residue LED/LD lookup tables

Optical arithmetic/logic unit based on residue arithmetic and symbolic substitution

Real-Time Signal Processing X

On The Characteristics Of Practical Optical Residue Look-Up Table Processors

Complexity of residue position-coded lookup table array processors

New technique of arithmetic operation using the positional residue system

Journal	Applied Optics
Publisher	OPTICAL SOC AMER
ISSN	1559-128X