147 Improving the Quality of Service of Etisalat Nigeria Authors: Okonba B. J., Iroegbu C. International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (20 downloads) Abstract Quality of service is a vital performance indicator that is used in determining the efficiency of an industry in terms of services rendered. Delivering excellent service is a winning strategy. Quality service sustains customers' confidence and is essential for a competitive advantage. In telecommunication system, accessibility, retainability and connection (voice) quality are three major factors used in evaluating quality of service of an operator. Etisalat , as one of the leading telecommunication industry in Nigeria, it is expected that maximum satisfaction be derived by their customers in regards to any service(s) paid for. This paper has therefore aimed at suggesting on how to improve on the quality of services rendered by Etisalat Nigeria. Keywords: Etisalat, Quality of service, telecommunication, satisfaction, accessibility
155 Performance Evaluation of Convolutional Encoders with Different Constraint Rates Authors: Ekwe. A. O, Iroegbu. C, Okoro. K. C International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (22 downloads) Abstract This paper is on the performance evaluation of convolutional encoders of different rates with consraint length 7 and viterbi decoders. Shannon’s capacity theory has shown that it is theoretically possible to transmit information over a channel at any rate with an arbitrary small error probability. Path loss and path fading can introduce errors to the signal during propagation, thus channel coding is introduced to overcome these problems. Convolutional codes are non blocking codes that can be designed to either correct or detect errors. The approach adopted in this research was to use information from various technical journals, research data and world-wide user’s experiences to evaluate configurable rate convolutional encoder with Viterbi decoder from a mother code rate 1/2 and a constraint length 7 with other higher rates of 2/3, 3/4 and 5/6 to ascertain their performances. The Convolutional encoders have proved to be a veritable tool for reducing the effects of noisy transmission channels. Keywords: Convolution, Encoding, Viterbi, Decoding, Evaluation
163 slugFlexural Strength and Ultrasonic Pulse Velocity of Crushing Sand-Lime-Cement-Phosphogypsum Building Bricks Grade SW Authors: Lamia Bouchhima, Mohamed Jamel Rouis, Mohamed Choura International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (19 downloads) Abstract The present work focuses on the flexural strength and ultrasonic pulse velocity of crushing sand –lime-cementphosphogypsum building bricks grade SW. It is observed that these bricks have sufficient Ultrasonic pulse velocity. The relationship between ultrasound pulse velocity (UPV) with strength and water absorption of bricks was studied. The results suggest that there is a close relationship between UPV and mechanical properties and water absorption of full bricks. The correlations indicate the homogeneity of phosphogypsum and crushing sand based bricks grade SW produced under a pressure of 27 MPa. Keywords: static compaction, ultrasonic pulse velocity, water absorption, homogeneity
160 Dielectric Studies of Ion Induced PVDC (Poly vinylidene chloride) Authors: Kusam Devgan International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (20 downloads) Abstract Dielectric properties of ion induced PVDC (Poly vinylidene chloride) were analyzed. Lithium (50 MeV), carbon (85 MeV) and nickel (120 MeV) ion beams were used to analyze the modifications induced by swift heavy ions as a function of ion fluence, ranging from 1x1011 to 3x1012 ions/cm2. Dielectric constant (ε′) for pristine and irradiated increases with the increase in ion fluence. Keywords: Swift heavy ions, Dielectric constant, Irradiation, Polymer
198 Detecting Intrusions In Multi - Tier Web Applications Using Double Guard Authors: Stephant Naorem, Abhishek Sharma International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (21 downloads) Abstract Internet services and applications have increased in both popularity and complexity and such services employ a web server front –end and a back –end. Thus data from web server and database server are prone to be hacked easily which relies to provide more security to web applications..To overcome this issue Double Guard system is used. Intrusion Detection System is used in Double Guard to manages both front end and back end of the multi-tier design and exposes a wide range of attacks with 100% accuracy. Keywords: DoubleGuard, database server, multi- tier web application, web server
159 Optimal Power Allocation and Power Control Parameter in OFDM-Based Cognitive Radio Systems Authors: Nguyen Van Vinh, Yang Shouyi International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (20 downloads) Abstract In orthogonal frequency division multiplexing (OFDM)-based cognitive radio (CR) systems, the optimized algorithms for sub-carrier power allocation face the problems of complex iterative calculation and difficult realization. In this paper, we propose an exponential power distribution function and derive a sub-optimal power allocation algorithm. This algorithm aims to allocate power of in-band subcarriers of cognitive users according to the numerical characteristics of the power distribution function by using a convex optimization numerical method under linear constraints. This algorithm has the advantages of fast calculation speed and easy realization, and reduces the interference to the authorized users, which is caused by the power leakage of the in-band subcarriers of cognitive users to the out-of-band subcarriers. Simulation results show that the proposed algorithm maximizes the in-band channel capacity of the cognitive users under certain interference thresholds of the authorized users, thus increasing their transmission rate. Keywords: Orthogonal Frequency-Division Multiplexing (OFDM); Cognitive Radio (CR); Power Allocation; Linear Water-Filling; Convex Optimization.
227 Crack detection and crack propagation through vibration monitoring in sugar mill roller shaft Authors: K Karthick International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (18 downloads) Abstract The effects of vibration in mill roller shaft during sugar cane crushing which is one of the crack possibility phenomena were analysed. Inducer tests under various unbalanced conditions performed to clarify the effect of mill roller shaft vibration. By using ANSYS software Dynamic analysis has been done for existing roller mill shaft. So, the natural frequency has obtained. By Fracture analysis the variations in natural frequency has concluded. Being different from other failure classification problems, this paper is concerned with determining the probability of normal condition based on current observations describing the condition of a mill roller shaft. Moreover, this problem can be translated to estimate the conditional probability of current observations given normal mill roller shaft condition using a Hidden Markov Model. From this point, a novel probabilistic health description index called Average Probability Index is proposed for mill roller shaft health evaluation. For automatic crack detection, a semi-dynamic threshold is presented to detect an early fault in a mill roller shaft. If the current API is lower than the corresponding threshold at the first time, we conclude that an incipient fault has occurred. Keywords: Dynamic analysis, Hidden Markov Model, API
159 Ultra-Conductors-The Future of Energy Transmission Authors: Mrs. Alka Sharma, Nikhil Kumar Yadav International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (24 downloads) Abstract The purpose of this paper is to provide the real information about the Ultra-Conductors to improve the transmission capacity of power system. The resistance offered by these conductors is zero or negligible, It means there is no loss of energy in the transmission. Keywords: Energy, Transmission
148 Density Based Quickly Accessible Neighbour Search with Keywords Authors: Aiswarya S, Usha K International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (18 downloads) Abstract Traditional spatial queries, for example, range search and closest neighbor recovery, include just conditions on items location properties. Today, numerous present day applications request forms of queries that intend to discover articles fulfilling both a spatial predicate, and a condition on their related writings or text. For an example, as opposed to considering all the lodgings, a closest neighbour inquiry would rather request the inn that is the closest among those whose menus contain "steak, spaghetti, schnaps" in the meantime. Presently, the best answer for such queries is focused around the Ir2-tree. It has a couple of inadequacies that essentially affect its effectiveness. Persuaded by this, another access technique called the spatial inverted list that broadens the conventional inverted index to adapt to multi dimensional information, and accompanies with algorithms that can answer closest neighbour questions with keywords in real time was proposed. The ranking of articles based on distance or the frequency of keywords were used in the above method. The computation of the shortest distance increased the complexity of the method. So here a new method is proposed that finds the neighbours with less space and time complexity. Keywords: Nearest neighbour queries, inverted index, spatial queries, geographic information systems, latitude and longitude of earth
160 Span: An Energy Efficient Coordination Algorithm for Topology Maintenance in Ad Hoc Wireless Network Authors: Ms. P.Nandhini, Dr.V.Radhika, M.C.A., M.Phil. International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (21 downloads) Abstract This paper presents Span, a power saving technique for multi-hop ad hoc wireless networks that reduces energy consumption without significantly diminishing the capacity or connectivity of the network. Span build son the observation that when a region of a shared channel wireless network has a sufficient density of nodes, only a small number of them need be on at any time to forward traffic for active connections. Span is a distributed, randomized algorithm where nodes make local decisions on whether to sleep, or to join a forwarding backboneasacoordinator.Wegiverandomizedalgorithmwherecoordinatorsrotatewithtime, demonstrating how localized node decisions lead to a connected, capacity-preserving global topology. Improvement insystemlifetimedue to Span increases as the ratio of idle-to-sleep energy consumption increases. Our simulations show that with a practical energy model, system lifetime of an 802.11network in power saving mode with Span is a factor of two better than without. Additionally, Span also improves communication latency and capacity. Keywords: energy, routing, topology-formation, wireless
155 Effect of 2D thermal gradient on free vibration of orthotropic tapered circular plate Authors: Subodh Kumar, Preeti Prashar International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (20 downloads) Abstract Plate construction is found in a wide range of structures, some of which include ships, bridges, aircrafts, storage tanks and steel gates. In some cases the maximum deflection of the plate is equal or larger than the plate thickness, in these cases, the mid- plane stretches and the in plane tensile stresses will be developed within the plate. Circular plate with bidimensional parabolic varying thickness and linear temperature are investigated. Separation of variables method used for the differential equation has been solved for vibration of visco-elastic orthotropic circular plate. Frequency equation is derived by using Rayleigh-Ritz technique with a two term deflection function. Frequencies for first two modes of vibrations are obtained for a circular plate for different values of taper constant and thermal gradient. Keywords: taper constant, thickness, thermal effect, plate, frequency
160 The Internet of Things: Future Trends and Perspectives Authors: J. Revanth International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (19 downloads) Abstract The incipient era of computing technology that many are calling the Internet of Things (IoT). Machine to machine, machine to infrastructure, machine to the environment, the Internet of Everything, the Internet of Perspicacious Things, perspicacious systems call it what we update, but it’s transpiring, and its potential is astronomically immense. The future Internet of Things as an astute collaboration of miniaturized sensors poses incipient challenges to security and culminate-utilize privacy. The IoT as billions of keenly intellectual, connected “things” (a remotely “universal ecumenical neural network” in the cloud) that will encompass every aspect of our lives, and its substructure is the perspicacity that embedded processing provides. The IoT is comprised of keenly interactive machines interacting and communicating with other machines, objects, environments and infrastructures. The ingenuity of this incipient era is abysmal, with astonishing potential to amend our lives. This paper gives trends and perspectives in the Internet of Things. Keywords: Future Internet, Security, Privacy, Neural Networks and Internet of Things (IoT)
154 Effect of Location on Construction Projects Authors: Varun Kumar Sharma, Rakesh Kumar Singla International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (17 downloads) Abstract In this document attempt has been made to study various types of construction projects and the location of these projects in different areas. A comparison has been made by the analysis of effect of location on the construction projects. Keywords: Human Resource (HR), Human Resource Management (HRM), Skilled labour, Real Estate, Infrastructural, Industrial, Urban, Sub-urban, Rural
163 Road Railway Safety System to Avert Accident in Unmanned LC Authors: A. Risvin, S.V. Anandhi International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (18 downloads) Abstract Railway transportation is one of the safest modes of transport. In unmanned level crossing the number of horrible fatal accidents that road vehicle driver and pedestrians cause. To reduce the accident in LC to introduce new technique Smart Video Surveillance Security System. This intelligent monitoring system that is tuned toward detecting and evaluating the abnormal situations induced by pedestrians, vehicle drivers and unattended objects. This technique starts by detecting, separating and tracking of moving objects in LC.Then HMM (Hidden Markov Model) is used to estimate the ideal trajectories, allowing the detected targets to discard dangerous situations. After that each detected object risk is estimated by Dempster Shafer fusion technique. The video surveillance monitoring system is connected with a communication system which sends alert message it to users approaching LC which takes the information on the dynamic status of LC (safe or presence of dander situations). Keywords: Video Surveillance Security System, Hidden Markov Model, Dempster Shafer
166 Numerical Analysis of the Bearing Capacity of Stone Columns Improved Ground Authors: Mohammadreza Jaberi Nasab, Adel Asakereh International Journal for Research in Applied Science and Engineering Techn... 2017/May/21 (18 downloads) Abstract Stone columns are a suitable technique for increasing the bearing capacity of soft and weak soils. In this study the results of a series of finite element analyses on square footing rested on both improved and unimproved soft soil were presented. The developed model was validated by one of the existing experimental reports. Afterwards, the parametric studies were performed to determine the effective geometrical and mechanical parameters and their effects on the bearing capacity of footing. Results indicated that the bearing capacity of footing can be considerably improved by implementation of stone columns. It was observed that the bearing capacity ratio (BCR) increases with increasing friction angle of stone column and decreasing cohesion and friction angle of soft soil. Keywords: Bearing Capacity, Square Footing, Stone Column, Numerical Analysis
