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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
Effect Of Curing Temperature And Curing Hours On The Properties Of Geo-Polymer Concrete
Mohammed Rabbani Nagral, Tejas Ostwal, Manojkumar V Chitawadagi
Karnataka, India
Paper Indexed : : 03.3005/039101011
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

Geopolymer, an inorganic alumina silicate polymer is synthesized predominantly from silicon and aluminum materials or from by-product materials like fly ash. In the present paper the effect of curing temperature, curing hours on Geo-polymer Concrete(GPC) specimens and also the effect of extra water on workability and compressive strength of GPC cubes were studied. Fly ash and GGBS were used as binder, combined with an alkaline solution to form geopolymer paste instead of cement paste to bind the aggregates. The experiments were conducted on GPC cubes for curing temperature of 80° C, 90° C and 100° C with curing period of 12 and 24 hours by adopting hot oven curing method. The constants used in the experiments were alkaline solution to binder ratio taken as 0.45, molarity of NaOH solution as 12M and ratio of sodium silicate to sodium hydroxide as 2.5. All the specimens were kept at one day rest period. The tests were conducted on each sample and results revealed that there is an increase in compressive strength for curing temperature 80°C to 90°C for both 12 and 24 hours of curing of GPC specimens. Maximum strength was obtained at temperature of 90°C for 12 hours of curing period. Beyond this, increase in curing temperature resulted in decrease in compressive strength of GPC specimen. Furthermore the study was continued by varying water to geopolymer solids ratio and addition of extra water to study the workability and compressive strength of GPC specimens at optimum temperature 90°C-12 hours. Results showed that increase in water to geopolymer solids ratio and extra water increased the workability of GPC and decreased the compressive strength of GPC.

Keywords:Curing hours, Curing strength, Curing temperature, Flyash, GGBS, GPC.

 

Research Article  open access
Analysis About Losses of Centrifugal Pump by Matlab
Ravi Shastri, Anjani Kumar Singh, Manish Kumar Singh
Jharkhand, India
Paper Indexed : :03.3005/0391012022
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

Design aids available today might have helped the pump designers to bring about theoretically the most efficient pumps, but the production technology and quality control during manufacture has not kept pace with such achievements in realizing the goals of developing energy efficient pumps. Pump designers often face the problem of selecting and optimizing a number of independent geometrical parameters whilst aiming at the derived efficiency from the pump. The only option is to approximate the theoretical design with experimental findings iteratively until the end result is achieved. It is found that about half of pumps were not performing efficiently, either because the wrong pump had been chosen for the job or because the pump was worn. If the pump is not doing its job, this can increase pumping costs and reduce productivity. To certain costs, use need to monitor energy usage regularly and repair and maintain the pump to operate efficiently. The aim of careful pump design parameter selection and regular pump maintenance is to have the pump performing as efficiently as possible, because this gives the lowest running costs. The pressure and flow that a pump is working at is called the duty. Efficiency changes with the range of possible duties for any specific pump. If one can improve pump efficiency for that the pump was designed to operate at, means reducing pumping costs. Pump efficiency measures hour well the pump converts electrical power to useful work moving the water.In addressing problems related to pumps, beside computing velocities, losses and other variables, the main aim is to study the effects of the various parameters on the performance of the machine and to investigate conditions that minimize losses and brake power, and maximize water power, overall efficiency, and other factors.

Keywords:Euler Equation, MATLAB

 

Research Article  open access
Design Consideration of Different Volute Casing at Best Efficiency Point for Commercial
Ravi Shastri , Anjani Kumar Singh , Manish Kumar Singh
Jharkhand, India
Paper Indexed : : 03.3005/0391023027
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

The pump casing is to guide the liquid to the impeller, converts into pressure the high velocity kinetic energy of the flow from the impeller discharge and leads liquid away of the energy having imparted to the liquid comes from the volute casing. A design of centrifugal pump is carried out and analyzed to get the best performance point. The design consideration and performance of volute casing pump are chosen because it is the most useful mechanical rotodynamic machine in fluid works which widely used in domestic, irrigation, industry, large plants and river water pumping system.

Keywords:volute, pump,BEP

 

Research Article  open access
Iterative Determinant Method for Solving Eigenvalue Problems
Owus M. Ibearugbulem, Osasona, E. S. , Maduh, U. J.
Owerri, Nigeria
Paper Indexed : : 03.3005/0391028031
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

This paper presents iterative determinant method for solving eigenvalue problems. A matlab program that operates iterative to evaluate the determinant of the problem was written. In the program, a trial eigenvalue is used in the program to compute the determinant. A small value (iterator) is added to trial eigenvalue to obtain a new trial eigenvalue, which is used to compute new determinant. The trial eigenvalue in the sequence that made the determinants to move from negative values to positive value or move from positive values to negative value becomes required eigenvalue. Some engineering problems were used to validate the eigensolver. Some of the data from the eigensolver and the corresponding exact data are 2.468 and 2.4678; 9.876 and 9.875; 60.001 and 60.00; 12.37 and 12.3695. Close look at

Keywords:eigensolver, iterative, determinant, eigenvalue, matlab program, iterator

 

Research Article  open access
Efficient Query Evaluation of Probabilistic Top-k Queries in Wireless Sensor Networks
P.Supriya ,M.Sreenivasulu, Me
Andhra Pradesh, India
Paper Indexed : :03.3005/0391032037
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

Indecisive data arises in a number of domains, including data addition and sensor networks. Top-k queries that grade results according to some user-defined score are an significant tool for exploring large indecisive data sets. So, we introduce the ordered query evaluation of the Enough set-based (ESB), necessary set-based (NSB), and boundary-based (BB) algorithm for distributed processing in Top-K queries in wireless sensor networks, for inter cluster query processing with delimited rounds of communications and in responding to dynamic changes of data giving out in the network, we build up an adaptive algorithm that dynamically switches between the three proposed algorithms to diminish the transmission cost. The general method to evaluate the reliability of a data robotically retrieved from the web. Finally results given that the proposed algorithms decrease data transmissions drastically and acquire only small constant rounds of data communications for reliability. The investigational results also demonstrate the superiority of the adaptive algorithm, which achieves a near-optimal performance under various conditions.

Keywords:Distributed data management, network topologies, probabilistic databases.

 

Research Article  open access
Effect of sintering time on the particle size and dielectric properties of La-doped PbTiO3 ceramic nanoparticles
A. A. Abd El-razek, E. M. Saed, M. K. Gergs
Egypt
Paper Indexed : :03.3005/0391038044
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

Nanoparticles of [Pb0.7 La0.2] TiO3 ceramics were prepared by conventional combustion technique from the oxides of PbO, La2O3 and TiO2 with different sintering time (ts) (2, 6, 10, 12, 16 and 20h) while keeping the calcination temperature at 1200 oC. Particle size of the samples was estimated between 25 to 65 nm through Scherrer formula and was found to increase with increasing sintering time (ts). Microstructural analysis of the samples was carried out using scanning electron microscope which showed that grain boundary increased with increasing sintering time (ts) while dislocations were reduced. The dielectric constant and Curie temperature of the samples was increased with increasing sintering time (ts), but the activation energy in both of ferroelectric and paraelectric (Ea) decreased with increasing ts. The diffusion coefficient (γ) decreased with increasing ts. In other words the optimum sintering time conditions was found.
Keywords:A. Ceramics, B. Crystal growth, C. X-ray diffraction, D. Dielectric properties.

 

Research Article  open access
Can Digital Drawing Tools Significantly Develop Children's Artistic Ability and Creative Activity?
Aber Salem ABOALGASM ||Rupert WARD
United Kingdom
Paper Indexed : :03.3005/0391045050
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

This study aims to investigate how the new digital art tools can significantly improve children‟s artistic ability and creative activity. This particular research tested 16 students aged 9-10 years old in art classes, with the intention of presenting a model for the development and measurement of technological creativity. It uses a modified TAM technology acceptance model to assess the usefulness of digital art tools. The children were provided with appropriate subjects and techniquesto improve their performance with the tools, and the relationship between art, technology and creativity was explored. The resultsof the project show a general improvement in pupils‟ artistic ability andinventivenessthrough the development oftheir technological skills,as well as greaterability to express themselves visually.
Keywords:Artistic ability, creative activity, children, ease of use of digital art tools, TAM technology acceptance model, usefulness of digital art tools, visual art.

 

Research Article  open access
Some Other Properties of Fuzzy Filters on Lattice Implication Algebras
Priyanka Singh|| Amitabh Banerjee|| Purushotam Jha
Raipur
Paper Indexed : : 03.3005/0391051054
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

In this paper we discuss several properties of fuzzy filters are given in lattice implication algebra, the new equivalent conditions for fuzzy filters are also discuss in lattice implication algebra.
Keywords:Lattice implication algebra, fuzzy implication, filter, fuzzy implicative filter.

 

Research Article  open access
Global Domination Set in Intuitionistic Fuzzy Graph
R. JahirHussain || S. Yahya Mohamed
India
Paper Indexed : : 03.3005/0491055058
International Journal of Computational Engineering Resaerch , Volume 4 ~ Issue 9 (September 2014)

Abstract

In this paper, We define global Intuitionistic fuzzy domination set and its number of IFGs. Also connected Intuitionistic fuzzy domination number of IFGs are discussed. Some results and bounds of global Intutionistic fuzzy domination number of IFGs are established
Keywords:Intuitionistic fuzzy graph, connected Intuitionistic fuzzy dominating set, global Intuitionistic fuzzy dominating set, effective degree.