Rotating disk flows arise in many areas of the electrochemical, biophysics, renewable energy systems and materials processing industries. Motivated by industrial applications, we examine a complex multi-physical coupled nonlinear heat transfer regime in the vicinity of a rotating disk incorporating thermal radiation, magnetohydrodynamics, and wall slip and variable thermophysical properties. A…

Optical sensors have wide range of application such as in medicine, astronomy, industry, and others. Sensitivity of symmetric three layered optical waveguide sensor is investigated. The proposed sensor consists of dielectric slab surrounded by metamaterial (MTM) cladding and MTM substrate. MTMs are new artificial materials which have simultaneously negative permittivity ε and negative pe…

In this paper, a comprehensive numerical study is presented for the fully developed two-dimensional flow of viscous incompressible fluid through a curved duct with square cross section. Numerical calculations are carried out over a wide range of the Dean number 100 Dn 6500 for the curvature 0.5 . A temperature difference is applied across the vertical sidewalls for the Grashof numberGr 100 , w…

The flow of information is an important quality assurance system of the subsystem. The use of information technology enables fast data transfer, product modeling, electronic data transfer for the demands of the customers / users, as well as fast and efficient production.In this paper, the analysis of the Macedonian companies is being given in terms of the extent to which they use relevant infor…

Global Positioning System (GPS) is a satellite based navigation system that can be used to locate positions anywhere on earth and proper timing determination. The Global Positioning System (GPS) uses accurate, stable atomic clocks in satellites and on the ground to provide world-wide position and time determination. As a result of their motion and being in the earth gravitational field, these …

Software systems find themselves working in an environment that forces them to be undergoing rapid change, and with each change to provide better services. In some systems, the functional requirements are easy to provide, it is the non-functional ones that are difficult. Yet with the ever changing requirements comes the demands for better quality and performance. For software system to achieve…

Purpose: the main purpose of the present study is to compare Internet addiction, feeling of loneliness, and educational progress between two groups of students of Oshnavieh Payam-e-Noor University including healthy and at-risk students. Methods: for the purpose of this study 260 subjects (143 female and 111 male students) participated which were selected by proportional random method. The rese…

Electrical Discharge Machining (EDM) is a well-established noncontact machining technique for manufacturing geometrically complex shapes on hard but electrically conductive materials that are extremely difficult-tocut by conventional processes. EDM has low material removal rate and Powder-Mixed Electrical Discharge Machining (PMEDM) is one of the latest techniques that has emerged to improve ma…

This research work verified the input solar irradiance and average power output per day of a 10W polycrystalline silicon solar panel (PsSp) and a 10W gallium arsenide (GaAs) solar panel, both of dimension 350x290x25mm3, fill-factor 0.7 in the four different quarters of the year 2013. The average power output in KWh/m2 per day in four quarters of the year were compared to determine which quarte…

The cadmium sulphide (CdS) is an important II–VI semiconductor (Eg = 2.42 eV, 515 nm) at room temperature with many excellent physical and chemical properties. It has promising applications in multiple technical fields including photochemical catalysis, gas sensor, detectors for laser and infrared, solar cells, nonlinear optical materials, various luminescence devices, optoelectronic devices…