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Frequency: 12 issues per year
ISSN: 2250–3005 (online version)
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International Journal of Computational Engineering Research

(IJCER)

 

Articles

 

Research Article  open access
Matlab Based High Level Synthesis Engine for Area And Power Efficient Arithmetic Operations
Semih Aslan
USA
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

Embedded systems used in real-time applications require low power, less area and a high computation speed. For digital signal processing (DSP), image processing and communication applications, data are often received at a continuously high rate. Embedded processors have to cope with this high data rate and process the incoming data based on specific application requirements. Even though there are many different application domains, they all require arithmetic operations that quickly compute the desired values using a larger range of operation, reconfigurable behavior, low power and high precision. The type of necessary arithmetic operations may vary greatly among different applications. The RTL-based design and verification of one or more of these functions may be time-consuming. Some High Level Synthesis tools reduce this design and verification time but may not be optimal or suitable for low power applications. The developed MATLAB-based Arithmetic Engine improves design time and reduces the verification process, but the key point is to use a unified design that combines some of the basic operations with more complex operations to reduce area and power consumption. The results indicate that using the Arithmetic Engine from a simple design to more complex systems can improve design time by reducing the verification time by up to 62%. The MATLAB-based Arithmetic Engine generates structural RTL code, a testbench, and gives the designers more control. The MATLAB-based design and verification engine uses optimized algorithms for better accuracy at a better throughput.

Keywords: FPGA, High Level Synthesis, MATLAB, Optimized Hardware, Power Efficient, RTL.

Research Article  open access
Modeling And Simulation of Wavelength-Routed optical Networks
Ankita A Chakor || Dr. Lochan Jolly
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

All-optical Wavelength Division Multiplexing (WDM) networks providing extremely large bandwidths are among the most promising solutions to the increasing need for high-speed data transport. A lightpath has a specific route and one or more wavelengths through which the information is routed from the source to the destination node. In wavelength-routed optical networks, data are transmitted solely in the optical domain along lightpaths from source to destination without being converted into the electronic form and each lightpath is allowed to use the same wavelength on all the links along its path. This restriction is known as the wavelength continuity constraint. And it leads to an issue called as blocking in networks. Optical wavelength conversion with suitable Routing and wavelength assignment (RWA) can increase the performance and capacity of optical networks by eliminating this restriction and relaxing the wavelength continuity constraint. In this research, we analyze the problem of placing a limited number of wavelength converters in a mesh network using Weighted Maximum Segment Length (WMSL) converter placement algorithm. It employs Least-Loaded Routing and First-Fit (LLR-FF) RWA algorithm. It is tested on varying number of nodes in network and its respective blocking probabilities are calculated. The proposed algorithm provides the minimum blocking probability on optimal wavelength converters placement.

Keywords: Wavelength Division Multiplexing (WDM), Wavelength-Routed Networks, Wavelength Continuity Constraint, Routing and Wavelength Assignment (RWA), Optical Network, First-Fit (FF),

Research Article  open access
Implementation of Linear Controller for a DC-DC Forward Converter
Aparna V V || Nithya Venkatesan
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

This paper discusses the controller implementation of a DC to DC Forward converter. The open loop response was obtained initially. Then the closed loop control was given in real time for the Forward converter. The MATLAB interfacing was done with the help of data acquisition card. The conventional PI controller was used for the closed loop control and the results were analyzed under MATLAB/SIMULINK environment.

Keywords: Open loop, Forward Converter, PI Controller, Interface, MATLAB, Data acquisition card, Closed loop

Research Article  open access
Probabilistic Seismic Hazard Analysis Of Dehradun City , Uttrakhand
Ashutosh Gupta || Sana Zafar
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

Dehradun is very old city and also rapidly growing urban area located in valley at foothills of Garhwal Himalayas. Dehradun city and adjoining region in western Himalayas is a is a very active seismic region of Himalayan belt , stretching from Pamir - Hindukush to Arkans in Burma.According to seismic zoning map of India , Dehradun city lies in Zone 4 and expected MSK intensity 8 .Dehradun city is located in the vicinity of twenty four independent seismic source zones which in reality are active faults. This creates uncertainties in size , location and the rate of recurrence of earthquakes. Probabilistic seismic hazard analysis provides a framework in which these uncertainties can be identified , quantified and combined in a rational manner to provide a more complete picture of the seismic hazard . This study presents a PSHA of the Dehradun city using the attenuation relationship given by Cornell et al (1979) in order to determinate various levels of earthquake-caused ground motion that will be exceeded in a given future time period.

Keywords: seismic source zones , active faults , attenuation relationship , recurrence of earthquakes , seismic hazard , fault length , uncertainties

Research Article  open access
Seismic Slope Stability
Mohammad Anis || S. M. Ali Jawaid
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

The performance of soil slope during an earthquake is generally analyzed by three different approaches which are pseudo-static methods, Newmark's Sliding Block method and numerical techniques. In pseudo-static approach, the effects of an earthquake are represented by constant vertical (kv) and horizontal (kh) seismic acceleration coefficients and the factor of safety is evaluated by using limit equilibrium or limit analysis or finite element method of analysis. Newmark's sliding block method evaluates the expected displacement of slope subjected to any ground motion obtained from the integration of the equation of motion for a rigid block sliding in an inclined plane. Numerical methods determine the expected displacements obtained from the stress – strain relationship of a soil mass. In this paper the stability of a model soil slope, comprising of an embankment with two canal bunds at the top, at different stages of construction, i.e. only embankment, embankment with empty canal bunds and embankment with canal bunds filled with water, with different foundation soils in different seismic zones have been analyzed and results have been plotted in the form of variation of factor of safety with horizontal seismic acceleration coefficient (kh). The critical case has been further analyzed under dynamic conditions. Dynamic analyses have been carried out by plotting the response spectrum curve and selecting 2001 Bhuj earthquake motion as the typical ground motion.

Keywords: Soil stability , Slope , Pseudo static , Newmark block sliding , Seismic acceleration , Static moment, Pseudo static moment

Research Article  open access
An Empirical Study of the Environmental Kuznets Curve for Environment Quality and Economic Growth --Evidence from China's Panel Data1
Xinxin Wang
China
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

This paper attempts to examine the determinants of environmental degradation within the framework of Environment Kuznets Curve (EKC) hypothesis using China's city-level panel data from 2003 to 2012. The population agglomeration as well as three types of cities such as municipalities, sub-provincial city and prefecture-level city are considered in our paper. Our empirical results with the whole sample data verified the theory of the EKC hypothesis, which shows a reverse "U" shape between economic growth and environmental pollution. In addition, the effect of population on environmental pollution is quite different among the various types of cities. The results of this study can serve as a useful reference for policy makers in terms of achieving economic and environmental sustainability.

Keywords: Economic growth, Environment Kuznets Curve, Fixed effects model, Panel data

Research Article  open access
An Approach for Enhanced Performance of Packet Transmission over Packet Switched Network
Sabyasachi Mukhopadhyay || Sandeep Kumar Singh
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

With the increased use of real time applications, there is a need for improved network traffic and bandwidth management. Switches are being used by computer networks for enabling connection between those hosts which are not connected by a direct link. When two or more than two host attempt to transmit packet at the same time, collision in data packets occurred. In this paper an optimized performance of local area network in terms of collision count and some other parameter have been investigated using simulation model. Simulation results have been obtained in different network scenarios by varying the number of devices in the network.

Keywords: LAN, Switches, Hubs, CSMA/CD, collision count, Multimedia, Latency.

Research Article  open access
Analysis of UHF ISO/IEC 14443 Gen 2 RFID Technology
Deepika K || Usha J
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

ISO/IEC 14443 is an International Standard for identification cards, contactless integrated circuit chips. Radio Frequency Identification (RFID) is an ISO/IEC 14443 proximity card; integrating Radio Frequency (RF) power and signal interface. RFID is a wireless communication which is used to record the presence of an article using radio waves. Analysis of RFID technology elaborates on the concepts evolving RFID, components of the RF network, understanding the fundamentals of how the data travels in waves into the framework. The exploration of the system such as architecture, characteristics, the classes of RF tags and the diversity of low- , high- , ultra high- , microwave frequency ranges are deliberated. Pros and cons of electromagnetic field identification – near field and far field communication are also identified. Applications of Ultra High Frequency (UHF) ISO/IEC 14443 RFID technology are analyzed.

Keywords: Communication, far field, near field, RF spectrum, RFID, RFID system

Research Article  open access
Achieving Energy Efficiency of HVAC through Variable Frequency Drive
Sumant Deshpande || Dr Mohan Buke
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

The Air Handling units generally consisting Cooling coils (water cooled of DX type) and Heating (Electric or steam ) are followed by air filters. The design of air flow calculation is done considering pressure drop filters are about 75 % chock .In actual use when filters are new or replaced the pressure drop is very less and we get high airflow which subsequently increases the Cooling and heating Load on system .If we put a velocity sensor after the filters which input fed PLC (Programmable Logical Controller) ,the motor RPM can be controlled ,saving the excess westage of Energy and pollution

Keywords: HVAC ,VFD, Energy Efficiency ,control, velocity sensor, DX coil ,heaters ,PLC

Research Article  open access
Simulation of Critical Crack Length Propagation Using Fracture Mechanics
Mr.DEGALA RAJENDRA || Mr. P RAVICHANDER || Prof. R V PRASAD
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

The focus of this paper is to investigate and analyze the study on the plate of steel, Aluminum and Epoxy with a center crack. Linear elastic fracture mechanics principles have been used for calculating Stress Intensity Factor, Critical crack length, Increment in crack, Mean stress and strain Amplitude at critical fatigue load cycles. Above calculations will be done on the plate with centre crack of various materials (steel, aluminum and epoxy) to predict crack length to evaluate and to compare the results with theoretical calculations. .Conclusions/results obtained on the basis of analysis.

Keywords: FRACTURE MECHANICS,FEM,ANSYS

Research Article  open access
TYPE-2 FUZZY LINEAR PROGRAMMING PROBLEMS WITH PERFECTLY NORMAL INTERVAL TYPE-2 RESOURCE
A.Srinivasan || G.Geetharamani
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

In this paper, the Perfectly normal Interval Type-2 Fuzzy Linear Programming (PnIT2FLP) model is considered. This model is reduced to crisp linear programming model. This transformation is performed by a proposed ranking method. Based on the proposed fuzzy ranking method and arithmetic operation, the solution of Perfectly normal Interval Type-2 Fuzzy Linear Programming model is obtained by the solutions of linear programming model with help of MATLAB. Finally, the method is illustrated by numerical examples.

Keywords: Fuzzy sets, Normal, Type-2 fuzzy sets, Interval type-2 fuzzy sets, Type-2 trapezoidal fuzzy numbers, Linear programming, Fuzzy linear programming.

Research Article  open access
Human Identification by Segmentation and Enhancement of Sclera using Matlab
Dr. P.V RAMA RAJU || T. MADHURI || T.LAKSHMI KANTH || V.USHA SREE
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 06 ~ Issue 04 (April 2016)

Abstract

Sclera is the white and opaque covering of the eye. The vein structure in sclera is unique and distinct to each person. This paper proposes a recognition method for human identification (ID) using sclera as a biometric. The challenge faced is that the vein structure moves with the movement of the eye and vessel structures are often defocused and or saturated. The sclera has been consider multilayered pattern. The contributions of the paper are:  This paper proposes a new approach for human sclera identification.  This paper proposes a new method for sclera segmentation which works for color as well as grayscale images.  This paper designs a Gabor wavelet based sclera pattern enhancement method to emphasize and binarize the sclera vessel pattern.  This paper proposes a line descriptor based feature extraction, registration, and matching method.

Keywords: Biometrics, sclera vein recognisation, sclera segmentation, sclera feature matching, enhancement, gabor filter.