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Das B.K.,Calcutta Institute Of Technology | Pal S.,Bengal Institute Of Technology
International Journal of Multimedia and Ubiquitous Engineering | Year: 2011

This paper presents a framework of intelligent tutorial system to incorporate adaptive learning and assess the relative performance of adaptive learning system over general classroom learning. In conventional classroom teaching and in distance learning the students may be from different backgrounds, their need of study and goal may be different; above all their ability to learn may not be similar. So teaching style and fitting teaching material may differ from student to student. A layered architecture of an Intelligent Tutorial System [ITS] for adaptive learning is proposed that assess the requirement, goal and capability of a student and dynamically sets a path for study, the instruction materials are dynamically selected as per the student's level of understanding from a given set of instruction materials. The system monitors the student and changes the path of study automatically as per the performance. Formative and summative test are taken by the system for decision making - as to which material is best for student and for assessing student's understanding level. The system also intelligently helps the user to overcome the misconceptions, as human teacher. Experimental results show the impressive improvement of the performances of students in distance mode learning using ITS following the proposed framework.

Singha A.K.,Calcutta Institute of Technology | Debnath U.,Bengal Engineering and Science University
International Journal of Theoretical Physics | Year: 2011

In this paper, we have considered a model for Brans-Dicke scalar field in presence of Chaplygin gas and interaction between them. We have shown that the BD parameter ω is constant or not, the Chaplygin gas provides early deceleration and late time acceleration of the universe. The graphical representation of statefinder parameters shows the total evolution of the universe starts from radiation era to phantom model. © 2011 Springer Science+Business Media, LLC.

Debnath R.,Calcutta Institute of Technology | Gangopadhyay S.,Calcutta Institute of Technology
Journal of Optical Communications | Year: 2016

We report formulation of simple but accurate analytical expressions at the splice for both angular and transverse mismatches in case of single mode triangular index fibers. Here, we employ the simple series expression for fundamental modal field of such fibers. The analysis takes care of large V values appropriate for single-moded guidance in such fibers as well as low V values. As regards evaluation of the said parameters by our formalism, little computation will be involved. We also show that our predictions match excellently with the available exact numerical results. Moreover, splices show high tolerance with respect to longitudinal separation and accordingly we restrict our analysis to the practical cases of transverse and angular offsets only. The present investigation should be of immense importance to the packagers and system engineers in the field of optical technology involving such kind of fibers. © 2016 by De Gruyter.

Dhar P.,Calcutta Institute of Technology | Chakraborty N.,Jadavpur University
2015 IEEE Power, Communication and Information Technology Conference, PCITC 2015 - Proceedings | Year: 2015

Optimal reactive power management is very important due to its ability of maintaining the voltage level and system security of a power system. An accurate and feasible method for the pricing of reactive power is essential for a competitive market scenario. In this paper a method for the pricing of reactive power is formulated considering the generation from synchronous generators and shunt capacitors present in the system. Minimization of total reactive power generation cost of the system is considered to be the objective function of the problem formulated in this paper. The pricing method for generated reactive power from shunt capacitors is based on the locational marginal price (LMP) of the bus. The output of the shunt capacitors are regulated depending on their LMP throughout the day. The method is implemented on a standard IEEE 30 bus test system. Cuckoo Search algorithm is used for the optimization process. The total cost of reactive power generation is found to be $2308.36 for a typical day having variable loads throughout the 24 hour of operation. © 2015 IEEE.

Paira S.,Calcutta Institute of Technology | Chandra S.,Calcutta Institute of Technology | Alam S.K.S.,Calcutta Institute of Technology
Procedia Computer Science | Year: 2016

One of the major fundamental issues of Computer Science is arrangement of elements in the database. The efficiency of the sorting algorithms is to optimize the importance of other sorting algorithms11. The optimality of these sorting algorithms is judged while calculating their time and space complexities12. The idea behind this paper is to modify the conventional Merge Sort Algorithm and to present a new method with reduced execution time. The newly proposed algorithm is faster than the conventional Merge Sort algorithm having a time complexity of O(n log2 n). The proposed algorithm has been tested, implemented, compared and the experimental results are promising. © 2016 The Authors. Published by Elsevier B.V.

Paira S.,Calcutta Institute of Technology | Chandra S.,Calcutta Institute of Technology | Alam S.S.,Calcutta Institute of Technology
ACM International Conference Proceeding Series | Year: 2016

With the emerging Science and Technology, network security has become a major concern. Researchers have proposed new theories and applications to eradicate the unethical access to the secret message. This paper presents a new algorithm on Symmetric Key Cryptography. The algorithm comprises of a bitwise shifting operation, folding logic along with simple mathematical operations. The fundamental security of the algorithm lies in the dual-layered encryption and decryption processes which divide the entire method into various phases. The algorithm implements a ciphered array key which itself hides the actual secret key to increase the integrity of the cryptosystem. The algorithm has been experimentally tested and the test results are promising. © 2016 ACM.

Mandal B.,Calcutta Institute of Technology | Chandra S.,Calcutta Institute of Technology | Alam S.,Calcutta Institute of Technology
ACM International Conference Proceeding Series | Year: 2016

The amount of data is increasing tremendously. With the upgraded technology the use of raw data as a sharing particle through various networks has becoming a part of the business procedure. Therefore one business organization has to incorporate the proper constraints on data and should implement a proper security algorithm that will be useful to protect their data in such a competitive environment. Cryptographic algorithms are useful in this context. We have proposed a cryptographic algorithm that provides security, authenticity along with two dimensional parity checking part that ensures that the message to be decrypted is originally the changed format of the plain text given and has not tampered while travelling through the network. Here the plain text is broken into several equal size (8 bit) blocks and applying the encryption operation on each block. © 2016 ACM.

Maity G.K.,Calcutta Institute of Technology | Roy J.N.,National Institute of Technology Agartala | Maity S.P.,Bengal Engineering and Science University
Communications in Computer and Information Science | Year: 2011

Conservative and reversible logic gates are widely known to be compatible with revolutionary computing paradigms such as low-power CMOS, nanotechnology, optical and quantum computing. A conservative reversible logic gate is the Peres Gate (PG). This gate is also known as New Toffoli Gate (NTG), combining Toffloi Gate and Feynman Gate. This paper presents an optical circuit for realization of Peres Gate in all-optical domain. Semiconductor optical amplifier (SOA) based Mach-Zehnder interferometer (MZI) can play a significant role in this field of ultra fast all optical signal processing. © 2011 Springer-Verlag.

Maity G.K.,Calcutta Institute of Technology | Maity S.P.,Bengal Engineering and Science University
Proceedings - 2012 3rd International Conference on Emerging Applications of Information Technology, EAIT 2012 | Year: 2012

Spread spectrum (SS) has proven to be an efficient transmission scheme due to its antijamming and interference reduction capability. In multiuser environment, users are assigned distinguishable unique codes with low cross correlation (CC) values among each other. Walsh-Hadamard codes are an important class of spreading codes that allow construction of long sequences with desired cross correlation values. Optical realization of Walsh-Hadamard codes becomes important for optical code division multiple access (CDMA). Design needs the use of nonlinear optics capable of handling multivalued signal. To this aim, this paper proposes an all-optical design of Walsh-Hadamard codes that exploit the polarization properties of light. © 2012 IEEE.

Bandyopadhyay P.K.,Calcutta Institute of Technology | Sarkar S.N.,University of Calcutta
Optical Engineering | Year: 2011

In this paper, we approximate the fundamental mode in single mode step and graded index optical fiber by a single parameter Lorentzian function within scalar variational framework. We show that it works in a low V region, a region important for evanescent wave coupling, more accurately in terms of propagation constant in comparison to single parameter Gaussian for linear and nonlinear fibers. Furthermore, we show that the low V variations of normalized propagation constant b(V), group delay d(V), and waveguide dispersion g(V) with V based on Lorentzian approximation match more accurately with the results for linear optical fiber in comparison to Gaussian approximation in the low V region. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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