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On ngμ-closed sets
No full textThe aim of this paper, we offer a new class of sets called ngμ-closed sets in nano topological spaces and we study some of its basic properties. We introduce and study ng μ-continuous, ng μ-irresolute and contra ng μ-continuous. Moreover, we obtain their properties and characterizations
Brain Tumor Segmentation from MRI Images Using Morphological Operation
No full textMedical image processing is the most important and challenging field now a days. MRI image processing is one of the parts of this field. Brain tumor segmentation in magnetic resonance imaging (MRI) has become an emergent research area in the field of a medical imaging system. Brain tumor analysis is done by the doctor of which the conclusion may vary from one doctor to another. To ease doctor judgment, in this paper we have applied some morphological operation on tumor shape and extracted the tumor area using MATLAB. Furthermore, we have calculated the affected area of tumor shape and then saved the result for the next observation with a unique id for a specific patient. After a few weeks, when the patient will come for the next observation, again our system will take a unique id and recent MRI image of the affected patient for showing the result after calculating the previous and present results. Our system totally removes the doctor's insipidness and abstains from the wrong diagnosis
Effect of deposition time and thermal emittance of copper sulphide thin films for use as a selective coating
No full textCopper sulfide thin films were deposited on aluminum sample plates using simple and cost-effective electroless chemical bath deposition (ECBD) techniques at a fixed temperature of 303K and varying deposition time ranging from 16 to 36 hours. A thermocouple potentiometer was used to measure the thermal emittance of the coated sample plates. Our results show that the thermal emittance values range from 0.161 to 0.192, depending on the deposition time. Observed also is the film thickness, which varies from 3.00 to 6.00 . It was however, observed that the films deposited at low deposition time have low thermal emittance; hence films deposited at low deposition time can find applications in photothermal devices
Stationary Multivariate Probabilities Estimation for Intelligent MCMC Algorithms
Get PDFThe purpose of this paper is to get theoretical and empirical results for stationary multivariate probabilities estimation of any clonal selection or genetic algorithm by new presented proposed algorithm. The estimation proposed formula is true for any regular Markov Chain to get the desirable multivariate distribution.
 
Electricity Generation from A Microbial Fuel Cell Using Abattoir Waste Water
Get PDFTwo dual chamber microbial fuel cells (MFCs) labeled MFC-A and MFC-B were fabricated with agar-agar salt bridge as the proton exchange membrane. Each of the MFCs contained wastewater gotten from an abattoir as the catholyte. The anolyte for MFC-A was potassium ferricyanide with double copper- copper electrodes while the anolyte for MFC-B was potassium permanganate with a single copper–copper electrode. Readings of voltage and current was taken for 10 to 12 hours daily for 14 days, a total of 495 hours. Also, the MFC performance was calculated in terms of various parameters such as Biological oxygen demand (BOD), total dissolved salts (TDS), pH, conductivity and temperature. MFC-A showed a maximum voltage output of 1.812v while MFC-B showed a maximum of 1.718v. The BOD removal efficiency of MFCs A and B was calculated as 78.33% and 72.67% respectively. MFC-A showed an average value of 1.643v on the last day of observation while MFC-B showed an average value of 1.531v on the 14th day. An MFC generates electricity from wastewater. The voltage generated in an MFC is independent on the number of electrodes used, potassium ferricyanide gives a better result than potassium permanganate. BOD removal efficiency increases with the number of electrodes used
A Chalcones: Promising Precursor in Chemistry of Heterocycles -Short Review: Chalcones
No full textChalcones derivatives are α, β-unsaturated ketones with the reactive ketoethylenic i.e.1, 3- diaryl-2- propen-1-ones (Ar-CH=CH-CO-Ar) group. They are coloured used as a natural pigment. It is one of the most important classes of flavonoids & iso-flavonoids across the whole edible plant kingdom. It is the oldest but remains popular in the 21st century due to a large number of replaceable hydrogens that allows a large number of derivatives. They bear excellent quality precursors because of this reason a variety of new heterocyclic compounds were synthesized. The purpose of this review is to provide an overview of some derivatives of chalcones
The Effects of Magnesium Content and Porosity on the Mechanical, Microstructural and Corrosion Properties of (1xxx) Aluminium Alloy
Get PDFThe effects of alloying elements on the mechanical, microstructural, and corrosion properties of Aluminum have been investigated. This investigation was done by fabricating alloys of Aluminum and Magnesium, with magnesium concentrations of 0.0, 0.1, 0.4, 0.8, 1.2, 1.5, and 1.8 weight percent. Subsequently, the mechanical properties of the samples were tested. Optical microstructural examinations were carried out on each of the samples, and the corrosion properties in a 0.2M H2SO4 solution were determined using the coupon testing method. The results obtained show that Magnesium does not just affect the mechanical, microstructural, and corrosion properties of Aluminum, but these properties are also dependent on the relative content of Aluminum and Magnesium. It was observed that 70 (RHB) was the maximum hardness obtained, and it occurs at 0.8 wt% Mg, after which the hardness becomes negatively affected. Magnesium addition was also found to increases the corrosion rate of (1XXX) aluminum in 0.2M H2SO4. It was also observed from the micrographs of the alloys that there was a uniform dispersion of Magnesium in the matrix of Aluminu
A Generalized Summation Formula
No full textIn this paper, we have developed the generalized expression of
and it’s corresponding integral form
On the Maximization of Investment Portfolios with Returns of Contributions
No full textIn this work, how investment portfolios of a pension scheme can be maximized in the presence of the return clause of contributions is presented. This clause permits the return of accumulated contributions together with predetermined interest from risk-free assets to members’ families whenever death occurs to their family members. Also consideredherein are investments in cash, marketable security, and loan to increase the total accumulated funds of the pension scheme left to be distributed among the surviving members such that the price models of marketable security and loan follow geometric Brownian motions. The game-theoretic approach, separation of variable technique, and mean-variance utility are used to obtain closed-form solutions of the optimal control plans for the assets and the efficient frontier. Next, the consequence of some parameters on the optimal control plans with time is numerically analysed. Furthermore, a theoretical comparison of our result with an existing result is given
On Drag of Circular Cylinder Suspended in uniform viscous Flow -Application to Tension Thread Flow Meter-
No full textThis paper is concerned with an exact solution of a circular cylinder in uniform viscous flow and its application to a flowmeter named Tension Thread Flow Meter. An analytical procedure to lead the exact solution for a drag of a circular cylinder suspended in a uniform viscous flow has been demonstrated, and it is found that the drag is proportional to the square of velocity weakly rather than the linear dependency on the velocity, as Stokes law for a sphere. When the Reynolds number Re < 0.4, the relation between the drag coefficient Cf and Re, as well as the drag of a circular cylinder in uniform flow and Re, have been derived and presented as simple analytical expressions. The theoretical results on the drag of a circular cylinder in a uniform flow have been applied directly to the prototype flowmeter, and to the velocity calibration for the selected scales of the thread, and their arrangements together with the velocity range, to be used. A prototype flowmeter has been manufactured and then deployed successfully to measure three velocity components in oscillatory waves. It is suggested that the potential of the flowmeter is almost limitless so that it is strongly recommended to develop the commercial version for general users, who are interested in measuring boundary layer flow, oscillatory wave, and turbulenc