International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2556

Table of Content: 15 June, 2012; 7(23)

June 2012

Control of a manipulator kinematics robotic arm on fuzzy cerebellar model articulation controller

While in this paper, we present a model of fuzzy cerebellar cortex that puts together two sorts of learning: feedforward and predictive association founded on learning between granule cell ascending branch and parallel fiber inputs, and reinforcement learning with feedback error correction based on climbing fiber activity. To show the model's utility, we simulated the control of a robotic arm. Specification of the...

Author(s): Alireza Jalali, Roziati Zainuddin and Pegah Mohammadi        

June 2012

Effect of gamma irradiation on biophysical and protection properties of melanin

Melanins are natural pigments distributed in living organisms and they are responsible for pigmentation of surface structure. In the present work, gel exclusion chromatography, spectrophotometric, and dielectric relaxation techniques were used to characterize DOPA melanin before and after irradiation with 60Co gamma rays in the range of 5 to 50 Gy. The results show that the studied melanin is composed of two...

Author(s): Magdy M. Ghannam, and Mohsen M. Mady,    

June 2012

Frictional resistance of coal dust fouled uniformly graded aggregates

Large deposits of coal over vast expanse of lands attract mining companies, power stations and petrochemical companies and thus the development of coal towns with rail and road networks. High traffic volume of large quantities of coal across coal cities often result in the gradual accumulation of fine coal dust particles on road pavements, rail ballast and sleepers.  The effect of coal dust on the Direct Shear...

Author(s): F. N. Okonta    

June 2012

Effect of zinc acetate concentration on the structural and optical properties of ZnO thin films deposited by Sol-Gel method

The transparent Zinc Oxide (ZnO) thin films were deposited by multi-step sol-gel method and the effect of sol concentration on structural, morphological and optical properties were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to characterize structures and morphologies of the as-deposited films. The crystallographic orientation of the ZnO films shows the preferred...

Author(s): M. Saleem, L. Fang, H. B. Ruan, F. Wu, Q. L. Huang, C. L. Xu and C. Y. Kong      

June 2012

Natural lifts and the geodesic sprays for the spherical indicatrıces of the mannheim partner curves in

In this paper, we investigated the natural lifts and curvatures of the spherical indicatrices of the Mannheim partner curves in . Firstly, it is shown that the Darboux vector of Mannheim curve and tangent vector of the Mannheim partners should be linearly dependent. Secondly, the relations among the geodesic curvatures and arc-lengths with respect to and of the fixed pole curve  and the...

Author(s): Süleyman ÅŸenyurt      

June 2012

A new approach to technique for order-preference by similarity to ideal solution (TOPSIS) method for determining and ranking drought: A case study of Shiraz station

In this research, using technique for order-preference by similarity to ideal solution (TOPSIS) index, drought phenomenon is determined and ranked. For this purpose, using 5 atmospheric elements including temperature, wind, precipitation days, annual precipitation, precipitation concentration index (PCI), droughts occurred in Shiraz station for 20-year statistical period (1983-2003) have been determined and ranked....

Author(s): Gholamreza Roshan, Gafar Mirkatouli and Ali Shakoor