International Journal of Engineering & Mathematical Sciences
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  ISSN NUMBER
  (Print) 2319 - 4537
(Online) 2319 - 4545
  List of Volumes
IJEMS
Volume 1(2012)
 
 Issue: 1(January - June), 2012
Volume 2(2012)
 
 Issue: 1 (July - Dec), 2012
Volume 3(2013)
 
 Issue : 1(January - June), 2013
Volume 4(2013)
 
 Issue : 1 (July - Dec.) 2013
Volume 5(2014)
 
 Issue : 1 (January - June), 2014
Volume 6 (2014)
 
 Issue : 1 (July - Dec.) 2014
Volume 7 (2015)
 
 Issue : 1 (January - June), 2015
Volume 8 (2015)
 
 Issue : 1 (July - Dec.) 2015
Volume 9 (2016)
 
 Issue : 1 (January - June), 2016
Volume 10 (2016)
 
 Issue : 1 (July - Dec.) 2016
Volume 11 (2017)
 
 Issue : 1 (January - June), 2017
Volume 12 (2017)
 
 Issue : 1 (July - Dec.) 2017
Volume 13 (2018)
 
 Issue : 1 (January - June), 2018
Volume 14 (2018)
 
  Issue : 1 (July - Dec.) 2018
 
   International Journal of Engineering & Mathematical Sciences
IJEMS,Volume 8 (2015), Issue : 1 (July - Dec.) 2015    Collapse all | Expand all
1. Study of Excess Thermodynamic Properties of the Binary Systems of Alkyl Substituted Alcohols at Different Temperatures (30°C, 35°C, 40°C)
Author : Seema Shukla and S. S. Yadav
Keyword : Benzene; Carbon disulphide; Carbon tetrachloride; Density

Volume: 8,Issue: 1,PP: 01 - 16,Year: (2015)
Viscosity (%), density ('), and ultrasonic velocity (V) were measured in binary mixtures of alkyl substituted alcohols (namely 2-methyl propanol-2 and 1,2-dimethyl butanol-2) with various solvents (namely benzene, toluene, carbon tetrachloride and carbon disulphide) at different temperatures (30°C, 35°C, 40°C). These parameters and concentrations were used to calculate isentropic compressibility (6s), intermolecular free length (Lf), molar volume (Vm), available volume (Va), acoustic impendence (Z), and shear relaxation time (9s). The results of the above acoustic parameters indicate that there is a significant interaction between the components in the binary systems studied.
2. Mathematical Model for Drug Therapy in Asthmatics
Author : Joel Ojuok Achienga, Omolo Ongati, Boniface Otieno Kwach
Keyword : Mathematical model; Linear system; Equilibrium; Stability

Volume: 8,Issue: 1,PP:17 - 27,Year:(2015)
This study presents a new mathematical model for drug therapy in asthmatics which includes external rate at which Theophylline is being increased in the form Y = AY + r(t)and whose solution was analyzed for equilibrium and stability to provide drug therapy in asthmatics in such a way that the concentration remains in the therapeutic range. It was established that the final model is stable compared to the existing models, that is, the eigen values of the coefficient matrix real, negative, and distinct. Theophylline can be administered at lower doses to achieve plasma concentrations of 5 − 10mg/l, which can avoid the risk of side-effects. This is an important contribution to research in modeling and more particularly to research in the field of drug therapy in asthmatics. This model would help the medical practitioners to administered Theophylline in such in such a way that the concentration remains in the therapeutic range.
3. Mathematical Model for Nutrient Exchange across the Placenta
Author : Joel Olielo Odongo, Omolo Ongati, Boniface Otieno Kwach
Keyword : Mathematical model; Linear system; Equilibrium; Stability.

Volume: 8,Issue: 1,PP: 28 - 35,Year:(2015)
This study This study presents a new mathematical model for nutrient exchange across the placenta which include nutrient exchange from foetus to mother to provide a system of equations in the form, Y􁈶 􀵌 􀜣􀜻 􀵅 􀝎􀔦􁈺􀝐􁈻 and whose solution was analyzed for equilibrium and stability. This model introduces another parameter that takes care of waste elimination from foetus to mother. It was established that the final model is stable compared to the existing models, that is, the eigenvalues of the coefficient matrix are negative real number and complex numbers with negative real parts. This shows that the new model provides one straight line of solutions tending to the origin and a plane of solutions which spiral towards the origin. This gives a more accurate mathematical model for nutrient exchange in the placenta. This model would create a lot of insight into nutrient exchange in the placenta, the elimination of waste from the foetus and open room for further research from the mathematical concept developed.
4. Open Circuit Voltage Variation in ZnPc/C60 Photovoltaic Device
Author : Dr. Hemant Kumar
Keyword : Open Circuit Voltage, Photovoltaic Device and Organic photovoltaic device

Volume: 8,Issue: 1,PP: 36-47,Year: (2015)
The effect of temperature on the performance of Zinc phthalocyanine (ZnPc)/fullerene (C60) bilayer organic photovoltaic (OPV) device has been investigated. Prior to temperature effect investigations the thicknesses of the active layers ZnPc and C60 were optimized to get the best photovoltaic performance. The best device exhibited an efficiency of ~ 1.4 % at room temperature. The investigations on the best device showed that temperature has significant effect on the photovoltaic performance. Short circuit (Jsc) decreases while open circuit voltage (Voc) increases on the reduction in temperature. The reduction in Jsc has been attributed to the temperature dependent electronic properties of the active organic layers while the increment in the Voc has been attributed to the temperature dependent built in voltage (Vbi) in OPV devices. In collectiveness the overall efficiency of the device first increases and then decreases with the reduction in temperature.
5. An Exact Periodic Solution of a MHD Oscillatory Flow through Porous Medium
Author : Yogendra Kumar Sagar and Dr Rajeev Jha
Keyword : MHD, Oscillatory flow, Periodic, Injection/suction parameter, porous medium

Volume: 8,Issue:1,PP: 4854,Year:(2015)
The study of an exact periodic solution of a two-dimensional flow of an electrically conducting viscous, incompressible fluid through porous medium bounded by two parallel infinite porous horizontal plates is presented. The lower plate is stationary and the upper one is oscillating in time about a constant mean. The fluid motion is also subjected to constant injection and suction through the lower and upper plates respectively in the presence of uniform magnetic field applied perpendicular to the plates. The unsteady problem is solved exactly and the transient velocity, the amplitude and the phase of the skin friction at the stationary plate are discussed.
 
 
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