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The graphs G = [V(G), E(G)] consider in this article are finite of order |V(G)|= n, undirected, without loops and multiple edges. For any set A ⊂ V(G) denote by 〈A〉 the induced sub graph on A, G - A stands for [V(G)\A]. The words cycle and path mean elementary cycle or path. The vertex connectivity of G will be denoted by k(G), the circumference of G (i.e., the length of a longest cycle in G) by c(G),...
This article deals with partitioning the vertex set V(G) into as many disjoint subsets, each being a majority dominating set with a required property. The majority domatic number dM(G) are found for some standard graphs. Some bounds and characterisations on dM(G) of a graph G are determined.
ZnS -MnS nano composite has been prepared through a chemical route, namely the microwave assisted solvothermal method. The nano structure of the prepared nano particles have been analyzed using X-ray diffraction (XRD), scanning electron microscope (SEM).Conductivity and Impedance measurements were carried out on the pelletized sample‥ The sizes of as prepared nano particles are found to be in 1– 6nm...
Villamayor and connell have obtained the necessary and sufficient condition for group algebra to be regular while the regularity of semi group algebra has been discussed by Weiss glass. The main objective of this paper is to find the condition for semi group algebra to be periodic. This will be proved here each periodic inverse semi group is completely semi simple.
Optical Transparent single crystals of Pb2+ doped Potassium acid Phthalate at different proportions were grown in aqueous solution by slow evaporation method at room temperature. The characterization of functional groups in the crystal lattice and optical absorption studies were done by FTIR and UV visible spectrophotometer.
Cardiospermum halicacabum L. (Sapindaceae) commonly known as “Balloon vine” is a dioecious, hairy, climbing vine with balloon like clusters of white flowers framed by finely dissected, delicate foliage. The leaf has a bitter taste; the entire plant is used as anti-inflammatory, antibiotic against many bacteria, antiparasitic, antipyretic and as an analgesic. It is extracted with five solvents (Petroleum...
This paper deals with the experimental investigation of effects of geometrical parameters of cutting tool insert and analysis of output responses such as surface roughness and Material Removal Rate (MRR) during machining AISI 1045 steel. This analysis is essential, since the wear, occurring at the cutting edge of the insert favors the surface roughness at the machined surface. Taguchi's Design of...
In present study two identical with same dimensions, experimental set up of flat plate collectors using -heat pipes were fabricated. In each set up three identical wickless copper heat pipes are used having length 620 mm and outer diameter of 18 mm. The working fluid used in one set up is pure water and in another pure water with nanoparticles.
Biomass derived vegetable oils can be used an alternative fuels for CI engines. In this view the properties measurement of biofuels and its blends with diesel were carried. Biofuels selected for the properties measurement are Undi, Palm and Simarouba. These fuels are added in proportions with pure diesels so as to biodiesel form. These biofuels in transesterfication process are prepared in ethyl and...
This paper is focused on determination of optimum conditions of the reactant and catalyst required for the production of biodiesel. The demand for petroleum is increasing with each passing day. This may be attributed to the limited resources of petroleum crude. In that case it becomes utmost necessity to search for alternate fuels which are renewable and in that biodiesel emerges a real solution....
The use of biodiesel fuels derived from vegetable oils as a substitute for conventional petroleum fuel in diesel engines is receiving an increasing amount of attention. This interest is based on a number of properties of biodiesel, including the fact that it is produced from a renewable resource, its biodegradability, and its potential to reduce exhaust emissions. An experimental investigation is...
Stir cast Al 7075/20%SiCp composites were subjected to compression testing at strain rates and temperatures ranging from 0.001 to 1.0 s−1 and from 300 to 500°C respectively. The associated microstructural transformations and instability phenomena were studied by observations of the optical electron microscope. The power dissipation efficiency and instability parameter were calculated by using the...
The idea of using vegetable oils as fuel for diesel engines is not new. With the advent of cheap petroleum, appropriate crude oil fractions were reined to serve as fuel and diesel fuels and diesel engines evolved together. In the 1930s and 1940s vegetable oils were used as diesel fuels from time to time, but usually only in emergency situations. Recently, because of increases in crude oil prices,...
Silicon carbide powder (SiCp) was milled in a high energy ball mill in 300 rpm for 8 hrs. The wet milling media was tungsten balls (WC) in chemical compound Toluene (C6H6-CH3).The milled powder then characterized by Atomic Force Microscope (AFM) to study topography and particle size analyzer.
Jet impingement is an effective means of localized heating or cooling. In many engineering and industrial applications, this process is used to get high heat flux. The present work deals with the studies of heat transfer characteristics of a single round impingement jet cooling on a flat surface with spent air exhaust ports on the jet plate. The experiments were performed to study the effect of the...
Optimal Trajectory planning is very important to the operation of robot manipulators. Its main aim is to generate the trajectory from initial to goal that satisfies some objectives, like minimization of Time interval, Acceleration, Joint Jerk, Torque, Vibration, mechanical energy consumption of Actuator and obstacle, collision avoidance criteria by satisfying the manipulator's kinematic and dynamic...
Increased environmental awareness and quick depletion of natural resources are driving the researchers to develop viable alternative fuels from renewable resources that are environmentally more acceptable. The use of oxygenates to replace the lead additives in gasoline are being considered as an alternative. In this work, oxygenated fuel is prepared by mixing 80% of gasoline with 10%, 5% and 5% (composition...
The paper illustrates the use of MATLAB/SIMULINK software for the modelling of D-statcom system. The dynamic behaviour of the system is learned by testing the basic system under large and small disturbances. The voltage sag mitigation associated with different configurations of the system is observed. To show the effect of controller on the voltage sag mitigation and reactive power compensation under...
Electrical distribution system is the final stage in the supply of electric energy to consumers. A serious problem faced in power distribution today is due to the major losses accompanying electricity distribution. As a result utilities in the power sector are currently focusing on its reduction in order to be more competitive, since the electricity prices in deregulated markets are affected by the...
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