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Dahiya N.,Maharaja Surajmal Institute of Technology | Bhatnagar V.,Ambedkar Institute of Advanced Communication Technology and Research | Singh M.,YMCA University of Science and Technology
International Journal of Networking and Virtual Organisations | Year: 2013

Data warehouse is playing an important role in strategic decision making process for complex business solutions. To gain competitive advantage, business executives are increasingly making use of data warehouse concepts as it plays a vital role in analysing, predicting future trends based on past and current scenarios. We as authors have surveyed the various techniques used in building of data warehouse and the methods used for the implementation of techniques. We have conducted an in-depth survey of existing literature from various known international journal papers to come up with a framework which will help the researchers to focus on specific and emerging areas in the field of data warehouse development as well as application of data warehouse in various business domains. Copyright © 2013 Inderscience Enterprises Ltd. Source


Bhatia R.,Ambedkar Institute of Advanced Communication Technology and Research | Sharma A.K.,National Institute of Technology Jalandhar
Optik | Year: 2013

In this paper, it is shown that at a high bit rate of 80-Gb/s alternate polarization of adjacent bits in aWavelength Division Multiplexed (WDM) transmission link improves the system performance in termsof improved Q factor and minimum bit error rate (BER). Alternate Polarization Return to Zero (al-PRZ)further suppresses the non-linear effects at higher power levels of 25 dBm per channel and also improvesthe transmission length to 640 km for a N × 80-Gb/s WDM system and hence results in an improvementof BER to 10-20. © 2013 Elsevier GmbH. All rights reserved. Source


Malhotra R.,Delhi Technological University | Khari M.,Ambedkar Institute of Advanced Communication Technology and Research
International Journal of Bio-Inspired Computation | Year: 2013

The complexity of software has been increasing in the past few years, and software testing as a most intensive factor is becoming more and more expensive. Testing costs often account for up to 50% of the total expense of software project development; hence any techniques leading to the automatic test data generation will have great potential to substantially reduce these costs. Existing approaches of automatic test data generation have achieved some success by using heuristic search-based approach, but they are not summarised. In this paper we presented a survey on heuristic search-based approach, i.e., genetic algorithm for automated test data generation. We summarise the work done by researchers those who have applied the concept of heuristic search-based approach for test data generation. The main objective of this paper is to acquire the concepts related to heuristic search-based approach for automated test data generation and moreover the use of heuristic search-based approach fascinated by the fact that many of the testing problems can be formulated as search problem. We also provide constructive guidelines for future research for automated test data generation. Copyright © 2013 Inderscience Enterprises Ltd. Source


Bhatia R.,Ambedkar Institute of Advanced Communication Technology and Research | Sharma A.K.,National Institute of Technology Jalandhar | Saxena J.,Punjab Technical University
2013 High Capacity Optical Networks and Emerging/Enabling Technologies, HONET-CNS 2013 | Year: 2013

In this paper, simulation of 60-Gb/s alternate polarization of adjacent bits in a Wavelength Division Multiplexed (WDM) transmission link has been carried out for Return to Zero and differential phase shift keying modulation formats. Alternate Polarization Return to Zero (al-PRZ) system for 8, 16 and 32 channels has been analysed. The effect of variation of input power is observed in terms of Q value. It is found that Alternate Polarization Return to Zero (al-PRZ) suppresses the nonlinear effects at higher power levels of 22 dBm per channel and also improves the transmission length to 640km for a N X 60-Gb/s WDM system. © 2013 IEEE. Source


Khandelwal M.K.,Indian School of Mines | Kanaujia B.K.,Ambedkar Institute of Advanced Communication Technology and Research | Dwari S.,Indian School of Mines | Kumar S.,Ambedkar Institute of Advanced Communication Technology and Research | Gautam A.K.,G B Pant Engineering College
AEU - International Journal of Electronics and Communications | Year: 2014

A compact Microstrip-Line-Fed stacked patch antenna is proposed for WLAN/WiMax applications. A circular shaped defect is embedded in the ground plane and antenna is stacked by a circular patch with air gap. Dual band characteristic is achieved at 2.55 GHz and 5.25 GHz with a compactness of 36%. The antenna is proposed for WiMax and WLAN applications according to IEEE 802.16 and IEEE 802.11a/n standards, respectively. Further, the proposed structure is stacked using a dielectric superstate with air gap. Proposed structure resonates at 2.45 GHz and 5.1 GHz and is suitable for WLAN applications according to IEEE 802.11b/g/n, and IEEE 802.11a/n standards, respectively. The first band of this configuration covers the ISM band. The compactness further improves to the value of 38.3%. A novel theoretical analysis is proposed for the stacked antenna with defected ground plane. The structures are analyzed using Ansoft HFSS v.14 based on Finite Element Method (FEM). Suppression in cross-polarization level of the proposed antenna is achieved. The measured results of fabricated antennas are in good agreement with simulated and theoretical results. © 2014 Elsevier GmbH. Source

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