Open Access Short Research Article

Knowledge Management Perspective in Communication Security System

W. O. Apena, I. A. Adebanjo, Y. O. Olasoji, K. F. Akingbade, S. A. Oyetunji, M. O. Kolawole

Journal of Advances in Mathematics and Computer Science, Page 1-9
DOI: 10.9734/BJMCS/2016/23217

Security is an essential element in maintaining any network. This paper demonstrates the development and implementation of a communication security system that uses a layered approach to network security in the conceptual view of knowledge management, thus preserving the integrity of communication links and contents. Communication security system (CSS) is viewed and analysed as a Knowledge Management (KM) concept that process trends of information, authenticates, authorises users and encrypts any data sent across the network.

Open Access Original Research Article

Load Frequency Control Using Fuzzy Logic Based Controller for Multi-area Power System

D. K. Sambariya, Vivek Nath

Journal of Advances in Mathematics and Computer Science, Page 1-19
DOI: 10.9734/BJMCS/2016/22899

Load frequency control (LFC) is required for reliable operation of a large interconnected power system. The main work of load frequency control is to regulate the power output of the generator within a specified area with respect to change in the system frequency and tie-line power; such as to maintain the scheduled system frequency and power interchange with other areas in a prescribe limits. In this paper, study of LFC system for single area and double area non-reheat thermal system is carried out. Fuzzy logic controller is used for controlling the frequency and tie-line power deviation. The robustness of the fuzzy logic controller is seen for different loading condition. Frequency and tie-line power response of the interconnected areas have been compared on the basis of peak-overshoot, peak-undershoot and settling time. The result of the fuzzy logic controller is compared to that of with classical controller such as proportional derivative plus integral (PID) controller, and it is found that the convention controller response is slow as compared to the intelligent controller.

Open Access Original Research Article

A Face-based Age Estimation System Using Back Propagation Neural Network Technique

M. O. Oladele, E. O. Omidiora, A. O. Afolabi

Journal of Advances in Mathematics and Computer Science, Page 1-9
DOI: 10.9734/BJMCS/2016/22869

Age estimation is the determination of a person’s age based on biometric features such as face, finger print etc. it is a hard problem for both humans and the computer system. In this paper, back propagation neural network was used to classify face images into eight different age groups ranging from babies, young teenagers, mid teenagers, teenagers, young adults, mid adults, young old and old. The process is divided into three stages: Image preprocessing, Feature Extraction and age classification. The images were cropped, resized and converted into grayscale in the preprocessing stage. Principal Component Analysis was used to extract the facial features that will be fed into the neural network classifier. Finally, back propagation neural network was used to classify the face images into any of the eight groups. The developed system was experimented with 630 face images with different ages from the FG-NET database. 450 samples were used for training while 180 were used for testing. The results showed a training time of 110.914 seconds, Mean Absolute Error (MAE) of 3.88 years and an overall accuracy of 82.2%.

Open Access Original Research Article

On Multiplicative and Redefined Version of Zagreb Indices of V-Phenylenic Nanotubes and Nanotorus

Mohammad Reza Farahani, Wei Gao

Journal of Advances in Mathematics and Computer Science, Page 1-8
DOI: 10.9734/BJMCS/2016/22752

Let G be an arbitrary simple and connected graph, with the vertex set V(G) and edge set E(G). The first Zagreb index of a graph G is defined as Capture2.JPG , where du and dv are the degrees of u and v, respectively. An alternative expression for M1 (G) is Capture3.JPG. And similarly, the Second Zagreb index M2 (G) = Capture4.JPG. In this paper, we consider a multiplicative version of M1 (G) and  M2 (G) and define them as PM1 (GCapture5.JPG  and PM(G) Capture6.JPG , respectively. And then we compute these Multiple Zagreb indices of V-Phenylenic Nanotubes VPHX[p,q] and V-Phenylenic Nanotorus VPHY[p,q] ("p,qÎℕ-{1}). Furthermore, we present the redefined Zagreb indices of V-Phenylenic Nanotubes VPHX[p,q] and V-Phenylenic Nanotorus VPHY[p,q] ("p,qÎℕ-{1}).

Open Access Original Research Article

Hexagonal Array Grammar System

K. Sujathakumari, Jismy Joseph, K. S. Dersanambika

Journal of Advances in Mathematics and Computer Science, Page 1-12
DOI: 10.9734/BJMCS/2016/22764

In 1995, J.Dassow, R.Freund, and G.Paun extended the concept of cooperating grammar system in string case to array grammars by introducing cooperating array grammar system in rectangular grids [1]. Motivated by the fact that, hexagonal arrays on triangular grid can be treated as two dimensional representation of three dimensional blocks, we extended the result of [1] to hexagonal pictures by de ning hexagonal array grammar system. Context-free and regular hexagonal array grammars are two special classes of these grammars and we have made studies regarding the power of cooperation in case of hexagonal array grammars. Different types of hexagonal array grammar systems are defined and the generative capacities of these grammar systems are compared according to the number of components and modes of derivation. We observed that the difference in the generative capacity is based on the fundamental difference between regular and context free array grammars.

Open Access Original Research Article

High Order Diminution of LTI System Using Stability Equation Method

D. K. Sambariya, Gyanendra Arvind

Journal of Advances in Mathematics and Computer Science, Page 1-15
DOI: 10.9734/BJMCS/2016/23243

In this paper, a high-order transfer function is reduced by the stability equation method. The reduced model is based on the pole zero patterns. In this paper, the stability equation method is compared to other methods and proved to be better in comparison to other methods in literature. The analysis is based on the settling time, rise time and overshoot observations of the reduced and original system.

Open Access Original Research Article

The Representations by Certain Duodenary Quadratic Forms

Bars Kendirli

Journal of Advances in Mathematics and Computer Science, Page 1-20
DOI: 10.9734/BJMCS/2016/23292

The determination of the number of representations of a positive integer by certain quadratic forms is an important goal of number theory. Formulae for N(12i, 22j, 32k, 62l; n) for the nine octonary quadratic forms appear in the literature, whose coefficients are 1, 2, 3 and 6. Here, we determine formulae, for the numbers of representations of a positive integer by one hundred and six different duodenary quadratic forms whose coefficients are 1, 2, 3 and 6.