International Journals of Multidisciplinary
Research Academy (IJMRA)

Abstract:
The linear stability of Walters B viscoelastic fluid saturated horizontal porous layer is examined theoretically when the walls of the porous layer are subjected to time-periodic temperature modulation. Three types of boundary temperature modulations namely, symmetric, asymmetric and lower wall temperature modulation is considered. A regular perturbation method based on small amplitude of applied temperature field is used to compute the critical values of Rayleigh number and the corresponding wave number. The shift in critical Rayleigh number is calculated as a function of modulation frequency, viscoelastic parameter and Prandtl number. The effect of all three types of modulations is found to be destabilizing as compared to the unmodulated system. This result is in contrast to the system with other types of fluids. Besides, the influence of physical parameters on the control of convective instability of the system is discussed.
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Abstract:
In this paper, We introduce a new class of continuous functions called Soft ARS continuous functions and discuss their relation with various forms of Soft continuous functions. Further We study the characterizations of Soft ARS continuous functions and reveal the impact of Soft ARS closure and Soft ARS interior in those characterizations. Also We establish Soft ARS irresolute and compare it with Soft ARS continuous functions.
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Abstract:
The present paper concerns study of peristaltic transport in relation to temperature effect and varying wall moment. A two layered peristaltic fluid flow model is employed in estimating the physiological flow parameters (velocity, flux, limitation of flux). Peristaltic flows are assumed to be the propagation waves along the flexible walls which can be compared with the transport of blood within the small blood vessels. The elasticity of varying wall consists of distensibility of the layer. The wall of the tube in a man is accounted for four coats and three neural mechanisms. The coats namely serous, muscular submucus and mucus play a role in the forward propulsion and the excellent lubricant. Therefore a series of contractions of the progressive waves enable the fluid to be transported under the peristaltic action. The resulting wave is sinusoidal due to the longitudinal and transverse moments produced by muscular fibers. The amplitude of the traveling wave on the elastic wall is so large that at the narrowest point the wall is pressed by each other. Numerical method is employed for the analytical expression as series form and the corresponding flow rate is studied in relation to peripheral circulation.
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Abstract:
The present study deals withPeristaltic transport of biofluid to compare the variations of velocity profiles using Casson fluid. The mathematical model is proposed to analyze the function of flux transported in the presence of yield stress. The axisymmetric flow is considered for contraction and expansion of peristaltic wave. The pressure rise and the velocity change are with a reference to rise in the shear when the fluid is subjected for peristaltic wave formations in the gastrointestinal tract.
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Abstract:
The study investigated the effects of Outdoor Activities and Advance Organizer teaching strategies on students’ academic performance in secondary school Basic Science in Ekiti State, Nigeria. Specifically, the study was designed to ascertain the difference in the performance of students exposed to Outdoor Activities, Advance Organizer and Conventional teaching strategies. The study also investigated the difference in the performance of students exposed to those strategies based on gender. The study adopted non-equivalent pre-test post-test design. The population consisted of 12, 033 Basic Science students in Ekiti State while the sample consisted of 138 J.S.1 students (intact class size) drawn from three public secondary schools in the three Senatorial Districts of Ekiti State. The sample was selected using multistage sampling procedure. The research instrument ‘Basic Science Performance Test (BSPT)’ was used to collect relevant data for this study. The face and content validity of the instrument was ensured while the reliability of the instrument was determined using split-half which yielded reliability co-efficient of 0.7872. The data were analyzed using inferential statistics of t-test, Analysis of Variance (ANOVA), Analysis of Covariance (ANCOVA) and Multiple Classification Analysis (MCA), all at 0.05 level of significance. The findings of the study showed that the three groups (Outdoor Activities, Advance Organizer and Conventional) were homogenous at the commencement of the experiment. The use of Outdoor Activities and Advance Organizer teaching enhanced performance of students in Basic Science than the Conventional strategy. However, Outdoor Activities and Advance Organizer are not gender biased. Based on the findings of the study, it was recommended among others that the use of Outdoor Activities and Advance Organizer teaching strategies should be encouraged in Basic Science class in Junior Secondary Schools so as to enhance academic performance of students in Basic Science. It was also recommended that Basic Science teachers should update their knowledge so as to accommodate the use of Outdoor Activities and Advance Organizer teaching strategies.
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