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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
Some Oscillation Properties of Third Order Linear Neutral Delay Difference Equations
A.George Maria Selvam || M. Paul Loganathan || K.R.Rajkumar
India
Paper Indexed : :03.3005/05070105
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

In this paper, we establish some sufficient conditions for the oscillation of solutions of third order linear neutral delay difference equations of the form...

Research Article  open access
Stochastic Model to Find the Characteristic Function of Insulinotropic Action of Glucose-Dependent Insulinotropic Hormone Using Compound Poisson Process
Dr. P. Senthil Kumar|| Ms. R. Abirami
India
Paper Indexed : :03.3005/0507006011
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

The purpose of the Study was to evaluate the comparison of insulinotropic actions of exogenous incretin hormones GIP(Glucose-dependent Insulinotropic Hormone) in Nine type-2 diabetic patients and in Nine age- and weight-matched normal subjects. An oral glucose challenge (75g/300ml) was performed in the morning after an overnight fast between the two distinct groups. The GIP response after oral glucose tended to be lower in the type-2 diabetic patients than normal subjects. In this paper, the problem is investigated by valuation of the characteristic equation obtained by applying Laplace transform to the second order delay differential equation represented by a general version of compound Poisson process.

Keywords: GIP, Exogenous Incretin hormone, type-2 diabetic, Poisson process, Brownian motion, type-2diabetic patients.2010 Mathematics Subject Classification: 60G50; 60G51; 60G55

Research Article  open access
Convection interaction in GaAs/LEC growth model
Reza Faiez|| Farzad Najafi|| Yazdan Rezaei
Iran
Paper Indexed : :03.3005/0507012023
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

Fluid flow and heat transport are investigated for the GaAs melt rotating with its cylindrical container in a liquid encapsulated Czochraslki (LEC) growth system in which the flow pattern and temperature distribution in the melt are influenced by coupling of rotationally–driven forces to the thermal convection. The experimentally observed particular shape of the crystallization front was predicted numerically. The convective flow in the melt was studied by focusing on the Rayleigh-Benard and the baroclinic instabilities. Increasing the crucible rotation rate, the dominant convective cell found to pivot by a small angle in the meridional plane around the vorticity vector. This pivoting angle is directly related to the Ekman shear angle.

Keywords: Computer simulation, Convection, Flow pattern, Coriolis forces, Interfaces, LEC growth

Research Article  open access
SEISMIC ANALYSIS OF R.C.C. AND STEEL SILOS
Krishna T. Kharjule || Minakshi B. Jagtap
India
Paper Indexed : :03.3005/0507024027
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

Structures used for storing bulk solids are called bins, bunkers, silos, or tanks. There is no generally accepted definition for these terms, shallow structures containing coal, crushed stone, gravel, and similar materials are called bins or bunkers and tall structures containing materials such as grain, cement and wheat are usually called silos. Elevated silos generally consist of a conical roof, a cylindrical shell and a conical hopper and they could be elevated and supported by frames or reinforced concrete columns. Circular silos (both steel and reinforced concrete) are used to store material in various industries like cement plants (clinkers), power plants( raw coal), oil and gas industry( sulfur pellets) etc.Elevated steel and reinforced concrete circular silo for storage show performance in earthquake reinforced concrete silo stability increases by using shear wall but loss of steel silo in earthquake stability increases using steel panel on opposite side Displacement of structure decreases in case of shear wall panel and stiffness increases.

Keywords: Elevated silos, response spectrum analysis, shear wall, steel plate, time history analysis

Research Article  open access
Social Media Applications for Project Management
Alina Mannanova
Russian
Paper Indexed : :03.3005/0507028033
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

Project communication and collaboration is a crucial activity that makes or breaks a project. Excellent technical skills and intuition may be insufficient to drive performance if not accompanied by appropriate levels of interpersonal interaction within project groups. Evidently that Global participation platforms and social networks like Facebook, LinkedIn and others and a mass of local blogs and web communities are an important source for next generation of project managers. How these new technologies will impact organizations, however, is not entirely clear. Therefore, it represents an important field for information systems research. This paper presents a survey study of the intrusion of social media in project management. We investigate some basic questions such as the possibilities, dangers, and limits (e.g. legal or ethical) of using social media services in project management. Also we analyzed the existed approaches that can serve as a start point for the successful and efficient implementation of such services. Ours results indicate that social media analysis can serve as an improvement tool for project management to reduce the product development time and associated cost through the implementation of social network analysis.

Keywords: Social media, social media network, project management, blog, wiki, information technology
Research Article  open access
Effects of Temperature Dependent Viscosity and Thermal Conductivity in a Mixed Convection Boundary Layer Flow of a Micropolar Fluid towards a Heated Shrinking Sheet in presence of Magnetic Field
Smita Sahu || P. K. Mahanta
India
Paper Indexed : :03.3005/0507034043
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

Effects of temperature dependent viscosity and thermal conductivity in a mixed convection boundary layer flow of a micropolar fluid towards a heated shrinking sheet in presence of magnetic field along with stagnation flow have been studied in the present work. The boundary layer equations are transformed into ordinary differential equations using similarity transformations. The effects of variable viscosity, variable thermal conductivity and the parameters involved in the study on the velocity, micro-rotation and temperature distribution profiles are investigated by solving the governing transformed ordinary differential equations with the help of Runge-Kutta 4th order method with shooting technique. The numerical results are shown graphically and discussed in detail

Keywords: Heat transfer, Magnetic field, Micro polar fluid, Shrinking sheet, Stagnation flow,Thermal conductivity, Variable viscosity

Research Article  open access
A Study to Draw the Relationship between Selected Body Composition Variables and Free Style Swimming Performance of School Boys.
Dr. Saikot Chatterjee || Mr. Deb Biswas || Dr. Bhashkar Chakraborty
India
Paper Indexed : :03.3005/0507044047
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

Swimming emerged as a competitive sport in the 1830s in England. In 1828, the first indoor swimming pool, St George's Baths was opened to the public.'"' By 1837, the National Swimming Society was holding regular swimming competitions in six artificial swimming pools, built around London. The sport grew in popularity and by 1880, when the first national governing body, the Amateur Swimming Association, was formed, there were already over 300 regional clubs in operation across the country. Weight and body composition are touchy subjects around most pool decks. Though many swimmers try to lose weight (or are told to do so), others believe that extra adipose may help swimming via added flotation as per Archimedes Principle. Others feel that a more curved body shape rounded by fatty tissue may also improve hydrodynamics. Yet despite any flotation benefits, frontal drag may be impaired by excess body mass. In a mixed-gender study, Geladas (2005) studied 263 swimmers aged 12-14 and examined predictors of 100m freestyle performance. In neither gender was body composition or weight significantly correlated with 100m. Several research studies have been conducted to analyze the impact of body or somatotype on sport also numerous studies conducted to assess the effects of body composition on various sporting events but according to the literature available very few studies have been conducted to locate the relationship between bodily fat mass, lean mass, fat percentage with swimming performance etc. thus the author felt encouraged to conduct the study entitled "A Study to Draw the Relationship between Selected Body Composition Variables and Free Style Swimming Performance of School Boys". The researcher conducted a study with 31students aged 13 to 17 years of Hooghly District School Swimming Competition – 2014. From statistical analysis i.e. correlation studies it appears that no positive correlation exists between BF% fat mass and lean mass with 50 mts. freestyle swimming performance.

Keywords: Freestyle swimming, Fat Mass, Body Fat percentage.

Research Article  open access
Performance of Thermal Energy Storage System with Finned Spherical Capsules
T. Siva gowthami || R. Meenakshi reddy
India
Paper Indexed : :03.3005/0507048053
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 07 (July 2015)

Abstract

Due to past depletion of conventional energy sources and ever increasing the demand of energy, many researchers started paying attention to renewable energy sources. Thermal energy storage is one key of technologies for energy conservation and has recently developed to a point where it can have a significant impact on modern technologies. The present work deals with the study of finned spherical capsules, the finned sphere is filled with the stearic acid as phase change material. Water used as the heat transfer fluid.HTF occupying space left between the finned spherical containers in thermal energy storage tank. Simulations of the charging and discharging process are performed and obtained results are compared with the previous theoretical results.

Keywords: Heat transfer fluid, PCM, Thermal energy storage, Latent heat, Charging process, Discharging process, TES tank.