Computer Science & I.T

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Prediction of Voltage Instability in Nigeria Interconnected Electric Power System Using V-Q Sensitivity Method

Author(s):Enemuoh F. O. -- Madueme T. C. -- Onuegbu J. C. -- Anazia A. E. 
Journal: International Journal of Computational Engineering Research(IJCER)
Publisher:IJCER Online
Abstract
| Pages: 99-107
The need to predict power system stability as it concerns voltage status is very important for the system planning, operation and control. This paper presents the prediction of voltage instability in Nigerian interconnected electric power system using V-Q sensitivity method. The method makes use of the least eigenvalue of the Jacobian matrix of the power system to calculate the V-Q sensitivity of the system. The highest sensitivity is an indication of the bus prone to voltage instability. The result from our calculations showed that Nigerian power system has the highest V-Q sensitivity of 0.1474 at the Maiduguri bus followed by Gombe, Kano and Jos with 0.1312, 0.0823 and 0.0370 respectively. It is very clear that the first bus that will collapse on the same percentage of loading will be Maiduguri followed by Gombe then Kano and Jos.

Automated Transportation Mechanism and Obstacle Detection

Author(s):Vinita Mathur -- Dr. Rajesh Kumar -- Mr. Aniruddhu Gautam 
Journal: International Journal of Computational Engineering Research(IJCER)
Publisher:IJCER Online
Abstract
| Pages: 108-111
The automotive sector is widely recognized as one of the industries with greatest importance and can assume in the development of a country economy this master’s thesis is about the implementation and evaluation of Automated Transportation mechanism and Obstacle Detection. By using a real time visual basic concept. A concept of automated transportation by a cooperative which enable robots to process a complicated or heavy duties task and over the large abstraction in the environment a method transportation utilizing forklift mechanism for lifting process and moving process. The path is store in memory by the programmer, the motion of the vehicle is controlled by stepper motor and controlling of the machine is done by micro- controller. Autonomous robotic vehicle guidance has been developed for industrial difficult.

Analysis of the Hurst Exponent for M2M Applications

Author(s):Stephen P. Emmons, -- Farhad Kamangar
Journal: International Journal of Computational Engineering Research(IJCER)
Publisher:IJCER Online
Abstract
| Pages: 112-118
Machine-to-Machine (M2M) applications represent a class of systems that make significant demands on the global Internet infrastructure. It is important to understand and characterize the behavior of these systems so that they may be effectively engineered for scalability and reliability. This paper analyzes the “Hurst exponent†(H) for several M2M applications of varying sizes with data collected for up to six months. The Hurst exponent is a measure of the long-term dependence and selfsimilarity typical of Internet-based communications systems. The analysis focuses specifically on the use of the “Rescaled-Range Statistic†(R/S), and also includes several other methods for comparison, including “Absolute Moment,†“Aggregate Variance,†“Higuchi,†and “Residuals of Regression.†The results show that such applications indeed exhibit strong long-term dependence, consistent with results found for other Internet communications studies.

Modelling Mutualism: A Mathematical Model Of Plant Species Interactions In A Harsh Climate

Author(s):E.N. Ekaka -- E.O.Chukwuocha -- Eziaku Osarolube -- E.H. Amadi,
Journal: International Journal of Computational Engineering Research(IJCER)
Publisher:IJCER Online
Abstract
| Pages: 119-140
Ecologists Have Observed That, In A Harsh Environment, Plant Species May Cease To Compete For Resources, But Display Positive Interactions Such As Mutualism. This Means That The Impact Of Climate Change, Where Harsh Envi- Ronments May Become More Benign, Could Be To Change The Nature Of Interac- Tions Between Plant Species And This May Be One Influence On Biodiversity. In This Talk, We Have Considered Whether The Observed Positive Interactions May Be Explained Through A Combination Of Existing Models Of Competition With Other Known Features Of The Environment In The Arctic (Where These Observa- Tions Have Been Made). This Provides A Prototype Model Where Sensitivity Of The Ecosystem To Different Types Of Environmental Change May Be Considered.

Pedagogical Engineering to Develop Digital Fluency Among PreService Teachers and Educational Leaders Of The 21 st -Century

Author(s):Dr Charles Kivunja
Journal: International Journal of Computational Engineering Research(IJCER)
Publisher:IJCER Online
Abstract
| Pages: 141-152
The children in our classrooms today have advanced skills for texting their friends on their eTablets and cell phones, instant messaging chats to their peers, dialoguing on MySpace, Twitter or Facebook, surfing the web or playing Xbox or Wii games. These Y Gen, Net Gen, Millennials and Z Gen, Digital Natives, are the children of the digital generation. Unfortunately, most of the teachers in today’s classrooms belong to the pre-digital generation and are immigrants without the skills required for 21 st century digital fluency. Moreover, their classrooms are not engineered for a digital pedagogy. This has created a teacher-student-classroom mismatch, which at worst, is characterized by the tragedy of illiterate teachers teaching literate students and by the dilemma of teachers who find the present tense and the past perfect! Pedagogical engineering is urgently needed to develop the digital fluency of teachers so they can speak their students’ language. One way to achieve this is to engineer digital technologies into curriculum as discussed in this paper which reports the results of classroom trials conducted with over 400 undergraduate and 15 doctoral students by the author, in the last three years. The paper concludes that there is an urgent need to train pre-service teachers and educational leaders in digital fluency. Failure to do so will perpetuate the mismatch between digital savvy students and teachers stuck in the orthodoxy pedagogy of the last century

Architectural Design of an Efficient Data Center

Author(s):Sree Bishwjit Chandra Das -- Md Kabirul Islam -- Syed Akhter Hossain
Journal: International Journal of Computational Engineering Research(IJCER)
Publisher:IJCER Online
Abstract
| Pages: 153-159
The purpose of this study was to analyze different data centers from design and function perspectives and develop a prototype of a data center for maximum efficiency. Relevant data on the designs and functions of several data centers as well as their advantages were gathered from various sources and analyzed. This is compared and summarized in this work. Finally, an architectural model of an efficient data center is developed. The proposed data center adopts several functions such as Virtualization, monitoring systems, Green IT, and dark strategy. These functions are expected to maximize efficiency, availability and agility, and reduce power consumption, space requirement, and cost of operations and staff salary

SEPARATION OF A BINARY FLUID MIXTURE DUE TO SORET EFFECT IN UNSTEADY MHD CONVECTION FLOW IN A POROUS MEDIUM

Author(s):B. R SHARMA, KABITA NATH
Journal: International Journal of Mathematics and Computer Applications Research
Publisher:TJPRC Pvt Ltd.
Abstract
| Pages: 1-8
Effects of heat source, magnetic field, and temperature gradient on separation of a binary mixture of incompressible viscous thermally and electrically conducting, and heat absorbing fluids in two dimensional boundary layer laminar unsteady flow through a semi-infinite porous medium bounded one side by a permeable plate in presence of a weak transverse magnetic field are investigated. The momentum, energy and concentration equations are reduced to nonlinear coupled ordinary differential equations by using separation of variables and series expansion methods. These coupled ordinary nonlinear differential equations are solved numerically by using MAT LAB’s built in solver bvp4c. These numerical results are exhibited graphically from which it has been found that the effects of various parameters are to separate the components of the binary mixture by collecting the lighter and rarer component near the plate and throwing the heavier one away from it.

DESIGN OF MIDDLEWARE FOR RESOURCE ALLOCATION TO THE HETEROGENEOUS TASK USING THE HEURISTIC CONSTRAINTS BASED ON MATHEMATICAL MODELLING

Author(s):M. RAJARAJESWARI, P. R. KANDASAMY
Journal: International Journal of Mathematics and Computer Applications Research
Publisher:TJPRC Pvt Ltd.
Abstract
| Pages: 9-18
The computational Grids facilitate the software applications to integrate instruments, displays, and computational resources which are managed by various organizations from extensive locations. The network performance monitoring and prediction provides the necessary information for the enrichment of scheduling the best resources such as where to get or put the data and where to execute the job, fault detection and trouble -shooting, identifying the bottleneck, performance analysis and tuning. The existing monitoring strategy will significantly increase the system overhead when the size of the computing facility grows. Activating all monitoring tools for different resources involved with an application, collecting such data, filtering them for obtaining useful information may become a major problem.In this scenario, the mobile agent technology can play a vital role because of its capability to cope up with the system‘s heterogeneity. Grid Resource Brokering strategy for resource allocation handling the resource metrics as well as the network metrics and integrated with CARE Resource Broker (CRB) for job submission using mobile agents were proposed. This paper mainly focuses on network monitoring in Grid which is based on Grid Monitoring Architecture (GMA) and network performance measurements to improve the resource utilization and reduced the load on the Grid resources.

COMPACTNESS AND CONNECTEDNESS IN VAGUE FUZZY DIGITAL BI-STRUCTURE SPACE

Author(s):R. NARMADA DEVI, E. ROJA, M. SUDHA
Journal: International Journal of Mathematics and Computer Applications Research
Publisher:TJPRC Pvt Ltd.
Abstract
| Pages: 19-30
In this paper, the concept of vague fuzzy digital bi-structure spaces is introduced. Some interesting properties of vague fuzzy digital structure bi-compact spaces and vague fuzzy digital structure bi-connectedness are discussed.
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