Physical Sciences and Engineering

The research paper discusses the growing importance of Industrial Mathematics and its useful applications in the organizations. As we all know that modelling and asymptotic analysis appear in classical applied mathematics, but industrial mathematicians need a wide and broad knowledge of mathematical ideas, algorithms and computer. They need an understanding of the problems in industry, actually they have to understand and speak the language spoken in the industries. Industrial mathematics is a mathematical modelling and scientific computing of industrial problems.

The adsorption of arsenic (V) on iron (III) hydroxide had investigated in function of sorbent amount, pH, and contact time. The surface complexation method is used to establish the interaction mechanisms. H3O+/OH-stoichiometry is evaluated and varied between -2 and 2, in pH range of 3 to 12. This suggests that As (V) adsorbs in this conditions, via six predominant adsorption reactions. Stability constants of predominant species which are protonated and unprotonated, are obtained. The contribution of electrostatic effect to arsenic (V) uptake by Fe-hydroxide is evaluated.

This article reviews single slope solar still and recent studies on the solar still systems for utilized for desalination process. The review includes basic principles of solar distillation and different modifications (optimization) suggested for improvement in distiller yield. General mathematical modeling methodology of solar stills. The efficiency and performance of the single slope solar still are also given.

In today’s world there is massive reduction in the fuel supply due to excessive use of vehicles. The moment when there is a direct inject of fuel engine shows the highest reducing in the fuel consumption and exhaust emission. Spark plugs offer only limited possibilities for optimising engine efficiency, due to their fixed position within a cylinder and the protrusion of electrodes which disturb the cylinder geometry and can quench the flame kernel. Laser radiation is non-invasive and has greater flexibility in terms of the ignition position, allowing the possibility of multipoint ignition.

Pyrolyticbehaviors of biomass (navel orange residue, NOR) and kinetic parameters were investigated bya thermogravimetric (TG) analyzer in N2 atmosphere. The results showed that the thermal degradation temperaturerange of NOR varied with heatingrates; the slower heatingrate, then arrower temperature range. The results indicated that total mass loss had to do with heating rate. Based on the DTG data with different heating rates, activation energy was calculated by three methods. The activation energy was from 104.75to 178.85kJ•mol-1; the order of reaction was 1.19.

The brain tumor tissue detection allows localizinga mass of abnormal cells in a slice of Magnetic Resonance (MR). The automatization of this process is useful for post processing of the extracted region of interest like the tumor segmentation. In order to detect this abnormal growth of tissue in an image, this paper presents a novel scheme which uses a two-step procedure; the k-means method and the Hierarchical Centroid Shape Descriptor (HCSD).

Concrete is one of the most important materials in construction. Concrete is weak in tension, so it affects ductility and also cracking. Based on the continuous research work is carried out around the world, various changes have been made from day to day time to overcome the deficiencies of cement concrete structures.

I had attempted to optimize the time needed to calculate the greatest common divisors in the Euclidean domain.

The chromium plating solution was prepared from Cr (III) salt mixed with a suitable chelating organic agents. The ratio of chelating agent concentration with Cr (III) concentration was selected object of this study before to apply in practice. Amino-acetic acid chelating compound was agent capable to form the complex with the Cr (III) ions but depending on the ratio of these substances present in solution.

This study was undertaken with a view to analyze trend, growth rate scenario and instability of mango fruit in two different periods of Punjab and Sindh provinces of Pakistan. Period I (1970 71 to 1991 92) and Period II (1992 93 to 2013 14). The study reveals that in period I of Sindh, the increase in production growth was due to increase in its area and productivity growth both but in Punjab it was only due to increase in area growth because the productivity growth was negative.