Poulose Jacob,K; Rekha, James K; Sreela Sasi(IEEE, April 1, 2009)
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Abstract:
Decimal multiplication is an integral part of financial,
commercial, and internet-based computations. This paper
presents a novel double digit decimal multiplication
(DDDM) technique that performs 2 digit multiplications
simultaneously in one clock cycle. This design offers low
latency and high throughput. When multiplying two n-digit
operands to produce a 2n-digit product, the design has a
latency of (n / 2) 1 cycles. The paper presents area
and delay comparisons for 7-digit, 16-digit, 34-digit double
digit decimal multipliers on different families of Xilinx,
Altera, Actel and Quick Logic FPGAs. The multipliers
presented can be extended to support decimal floating-point
multiplication for IEEE P754 standard
Description:
Programmable Logic, 2009. SPL. 5th Southern Conference on
Poulose Jacob,K; Shahana, T K; James, R K; Jose, B R; Sasi, S(IEEE, October 17, 2007)
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Residue Number System (RNS) based Finite Impulse Response (FIR) digital filters and
traditional FIR filters. This research is motivated by the importance of an efficient filter
implementation for digital signal processing. The comparison is done in terms of speed and
area requirement for various filter specifications. RNS based FIR filters operate more than
three times faster and consumes only about 60% of the area than traditional filter when
number of filter taps is more than 32. The area for RNS filter is increasing at a lesser rate than that for traditional resulting in lower power consumption. RNS is a nonweighted number system without carry propogation between different residue digits.This enables simultaneous parallel processing on all the digits resulting in high speed addition and multiplication in the RNS domain
Description:
Communications and Information Technologies, 2007. ISCIT'07. International Symposium on
Poulose Jacob,K; Sreela Sasi; Rekha, James K; Shahana, T K(International Conference on Computer Science and Applications, October , 2007)
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Abstract:
This paper presents a performance analysis of
reversible, fault tolerant VLSI implementations of carry select
and hybrid decimal adders suitable for multi-digit BCD
addition. The designs enable partial parallel processing of all
digits that perform high-speed addition in decimal domain.
When the number of digits is more than 25 the hybrid decimal
adder can operate 5 times faster than conventional decimal
adder using classical logic gates. The speed up factor of hybrid
adder increases above 10 when the number of decimal digits is
more than 25 for reversible logic implementation. Such highspeed
decimal adders find applications in real time processors
and internet-based applications. The implementations use only
reversible conservative Fredkin gates, which make it suitable for
VLSI circuits.
Description:
Proceedings of the World Congress on Engineering and Computer Science 2007
WCECS 2007, October 24-26, 2007, San Francisco, USA
Narayanan, K P; Pradeep, K R; Anju, Mohanan(IJSER, May , 2013)
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Abstract:
A sandwich construction is a special form of the laminated composite consisting of light weight core, sandwiched between two stiff thin
face sheets. Due to high stiffness to weight ratio, sandwich construction is widely adopted in aerospace industries. As a process dependent bonded
structure, the most severe defects associated with sandwich construction are debond (skin core bond failure) and dent (locally deformed skin
associated with core crushing). Reasons for debond may be attributed to initial manufacturing flaws or in service loads and dent can be caused by
tool drops or impacts by foreign objects. This paper presents an evaluation on the performance of honeycomb sandwich cantilever beam with the
presence of debond or dent, using layered finite element models. Dent is idealized by accounting core crushing in the core thickness along with the
eccentricity of the skin. Debond is idealized using multilaminate modeling at debond location with contact element between the laminates.
Vibration and buckling behavior of metallic honeycomb sandwich beam with and without damage are carried out. Buckling load factor, natural
frequency, mode shape and modal strain energy are evaluated using finite element package ANSYS 13.0. Study shows that debond affect the
performance of the structure more severely than dent. Reduction in the fundamental frequencies due to the presence of dent or debond is not
significant for the case considered. But the debond reduces the buckling load factor significantly. Dent of size 8-20% of core thickness shows 13%
reduction in buckling load capacity of the sandwich column. But debond of the same size reduced the buckling load capacity by about 90%. This
underscores the importance of detecting these damages in the initiation level itself to avoid catastrophic failures. Influence of the damages on
fundamental frequencies, mode shape and modal strain energy are examined. Effectiveness of these parameters as a damage detection tool for
sandwich structure is also assessed
Description:
International Journal Of Scientific & Engineering Research Volume 4, Issue 5, May-2013
Bindhu M, Krishna; Manu P, John; Nandakumaran, V M(Indian Academy of Sciences, December , 2008)
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The chaotic dynamics of directly modulated semiconductor lasers with delayed optoelectronic feedback is studied numerically. The effects of positive and negative delayed optoelectronic feedback in producing chaotic outputs from such lasers with nonlinear gain reduction in its optimum value range is investigated using bifurcation diagrams. The results are confirmed by calculating the Lyapunov exponents. A negative delayed optoelectronic feedback configuration is found to be more effective in inducing chaotic dynamics to such systems with nonlinear gain reduction factor in the practical value range.
James Thomas,Kunnanatt; Dr.Ramachandra, Poduval P(Cochin University Of Science And Technology, November 25, 1990)
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Abstract:
The present study by the researcher focuses attention on
the problem of performance effectiveness among managers operating
in one of the critical and socially important sectors of our
economy namely commercial banking. The banking sector is selected
for the study due to two reasons. Firstly, commercial banking
plays an important role in the country's development. Secondly,
for improving the efficiency of the banking system, we need to
know more about the performance dynamics of the executives in our banking organizations
Description:
School Of Management Studies
Cochin University Of Science And Technology
Kannan, Balakrishnan; Julie, David M(MECS, November , 2013)
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Abstract:
Learning Disability (LD) is a classification including several disorders in which a child has difficulty in learning in a typical manner, usually caused by an unknown factor or factors. LD affects about 15% of children enrolled in schools. The prediction of learning disability is a complicated task since the identification of LD from diverse features or signs is a complicated problem. There is no cure for learning disabilities and they are life-long. The problems of children with specific learning disabilities have been a cause of concern to parents and teachers for some time. The aim of this paper is to develop a new algorithm for imputing missing values and to determine the significance of the missing value imputation method and dimensionality reduction method in the performance of fuzzy and neuro fuzzy classifiers with specific emphasis on prediction of learning disabilities in school age children. In the basic assessment method for prediction of LD, checklists are generally used and the data cases thus collected fully depends on the mood of children and may have also contain redundant as well as missing values. Therefore, in this study, we are proposing a new algorithm, viz. the correlation based new algorithm for imputing the missing values and Principal Component Analysis (PCA) for reducing the irrelevant attributes. After the study, it is found that, the preprocessing methods applied by us improves the quality of data and thereby increases the accuracy of the classifiers. The system is implemented in Math works Software Mat Lab 7.10. The results obtained from this study have illustrated that the developed missing value imputation method is very good contribution in prediction system and is capable of improving the performance of a classifier.
Description:
I.J. Intelligent Systems and Applications, 2013, 12, 34-52
Poulose Jacob,K; Preetha, K G; Unnikrishnan, A(arXiv preprint arXiv:1208.4192, August 21, 2012)
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Abstract:
Mobile Ad-hoc Networks (MANETS) consists of a collection of mobile nodes without having a central
coordination. In MANET, node mobility and dynamic topology play an important role in the performance.
MANET provide a solution for network connection at anywhere and at any time. The major features of
MANET are quick set up, self organization and self maintenance. Routing is a major challenge in MANET
due to it’s dynamic topology and high mobility. Several routing algorithms have been developed for
routing. This paper studies the AODV protocol and how AODV is performed under multiple connections in
the network. Several issues have been identified. The bandwidth is recognized as the prominent factor
reducing the performance of the network. This paper gives an improvement of normal AODV for
simultaneous multiple connections under the consideration of bandwidth of node.
Description:
International Journal on AdHoc Networking Systems (IJANS) Vol. 2, No. 3, July 2012
Poulose Jacob,K; Sonia, Sunny; David, Peter S(IJRET, April , 2013)
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Abstract:
Speech is the most natural means of communication among human beings and speech processing and recognition are intensive areas of research for the last five decades. Since speech recognition is a pattern recognition problem, classification is an important part of any speech recognition system. In this work, a speech recognition system is developed for recognizing speaker independent spoken digits in Malayalam. Voice signals are sampled directly from the microphone. The proposed method is implemented for 1000 speakers uttering 10 digits each. Since the speech signals are affected by background noise, the signals are tuned by removing the noise from it using wavelet denoising method based on Soft Thresholding. Here, the features from the signals are extracted using Discrete Wavelet Transforms (DWT) because they are well suitable for processing non-stationary signals like speech. This is due to their multi- resolutional, multi-scale analysis characteristics. Speech recognition is a multiclass classification problem. So, the feature vector set obtained are classified using three classifiers namely, Artificial Neural Networks (ANN), Support Vector Machines (SVM) and Naive Bayes classifiers which are capable of handling multiclasses. During classification stage, the input feature vector data is trained using information relating to known patterns and then they are tested using the test data set. The performances of all these classifiers are evaluated based on recognition accuracy. All the three methods produced good recognition accuracy. DWT and ANN produced a recognition accuracy of 89%, SVM and DWT combination produced an accuracy of 86.6% and Naive Bayes and DWT combination produced an accuracy of 83.5%. ANN is found to be better among the three methods.
This thesis "Entitled performance of district industries centres in kerala :An application of augmented solow model.The first chapter deals with evolution of approaches for promoting small scale production and the growth of small scale industries in india.the developing countries face the problems like sluggish growth capital shortages high levels of unemployment,enoromous rural-urban economic disparities regional inequalities increasing concentration of capital and chronic difficulities in the export sector.Review of literature and methodology of the study are presented in the second chapter. In the third chapter an attempt has been made to make an in-depth study of the emergence and growth of district of district industries centres.In the chapter four an attempt was made to study the organisational structure of DICs functions and responsibilities assigned to the functional managers and performance of the functionaries.
Abdul, Hameed K; Dr.Jose, Payyappilly T(Cochin University of Science and Technology, November 11, 2003)
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Abstract:
This thesis "Entitled performance of district industries centres in kerala :An application of augmented solow model.The first chapter deals with evolution of approaches for promoting small scale production and the growth of small scale industries in india.the developing countries face the problems like sluggish growth capital shortages high levels of unemployment,enoromous rural-urban economic disparities regional inequalities increasing concentration of capital and chronic difficulities in the export sector.Review of literature and methodology of the study are presented in the second chapter. In the third chapter an attempt has been made to make an in-depth study of the emergence and growth of district of district industries centres.In the chapter four an attempt was made to study the organisational structure of DICs functions and responsibilities assigned to the functional managers and performance of the functionaries.
Description:
Department of Applied Economics, Cochin University of Science and Technology