Numerical framework for unsteady bioconvection flow of third-grade nanofluid over a porous Riga surface with convective Nield approach

The ultra-high significances of thermal radiation, magnetic field and activation energy in thermal enhancement processes allow significant applications in chemical and mechanical engineering, modern technology and various thermal engineering eras. The improvement in energy resources and production became one of the major challenges for researchers and scientists for sustained development in industrial growths. Beside this, the bioconvection assessment in nanomaterials conveys prestigious applications in biotechnology like bio-sensors, enzymes, petroleum industry, bio-fuels and many more. In view of such renewable applications, present exploration discloses unsteady two-dimensional flow of third-grade nanomaterial accommodating gyrotactic microorganisms induced by unsteady stretched Riga sheet in porous medium. The formulated flow problem is further scrutinized by utilizing the chemical reaction, activation energy, thermal radiation and magnetic aspects. The convective Nield constraints are further subjected in the current investigation. Apposite transformations are used to condense the nonlinear developed problem into dimensionless ordinary form. The numerical solution of such similar flow problem is presented via shooting technique. The detailed graphical illustrations of the dimensionless temperature, nanoparticles concentration, velocity and motile microorganisms for physical significance of diverse relevant parameters are deliberated. Furthermore, numerical data of local Sherwood, Nusselt and motile density numbers is designated in tabular form. Study accentuated that velocity increases for higher modified Hartmann and material constants, while the effects of buoyancy ratio and bioconvected Rayleigh numbers are rather opposite. The temperature, microorganism and concentration distributions were enhanced for unsteady parameter. It is also acknowledged that the concentration distribution is enhanced for activating the energy number. Moreover, the microorganism distribution enhances for concentration difference and magneto-porous constants, while bioconvected Lewis and Peclet numbers show conflicting trend.

Impacts of Joule heating and viscous dissipation on MHD pulsatile flow of third grade nanofluid in a channel

The current exploration deals with the third grade hydromagnetic pulsating flow of blood-gold nanofluid in a channel with the presence of Ohmic heating, viscous dissipation and radiative heat. In the present analysis, blood (base fluid) is considered as third-grade fluid and gold (Au) as nanoparticle. This investigation is useful in the fields of food processing system, pressure surges (pulsatile flow application), biomedical engineering, nano drug delivery, radiotherapy, and cancer therapeutic (nanofluid application). Perturbation method is employed to transform the set of governing partial differential equations (PDEs) into the ordinary differential equations (ODEs) and then solved by employing the fourth order Runge-Kutta method with the aid of the shooting technique. The impacts of emerging dimensionless parameters of velocity, temperature, and heat transfer rate of blood-Au nanofluid are analysed via pictorial outcomes in detail. The obtained results depict that the improvement in viscous dissipation and heat source enhanced the temperature of third grade nanofluid. The velocity and temperature of the nanofluid are declining functions with the enhancement of frequency parameter, material parameter, and non-Newtonian parameter respectively. Intensifying the volume fraction of nanoparticle dwindles the velocity and temperature of nanofluid. Enhancing volume fraction and viscous dissipation accelerates the heat transfer rate of nanofluid. The velocity, temperature, and heat transfer rates are decreased by an escalation of the Hartmann number. Further, enhancing the radiation parameter reduces the heat transfer rate and temperature of nanofluid.

DEVELOPMENT OF INTERACTIVE POWERPOINT LEARNING MEDIA THEME 1 SUBTHEME 3 ANIMAL GROWTH FOR THIRD GRADE STUDENTS OF SDN 007 TEBING KARIMUN

This study aims to know how the procedure for developing interactive powerpoint learning media and testing the feasibility of interactive powerpoint learning media products for third grade students of SDN 007 Tebing Karimun. This research was a research and development (R & D) that refers to the Borg and gall. Data on quality of product development were collected by questionnaire. Data analyzed with descriptive quantitative and qualitative techniques. The results of this study showed that: (1) the validation of material expert based on eligibility was in the criteria of very feasible (83%); (2) design expert validation was in the criteria very feasible (100%); (3) the response of the third grade teacher to the interactive powerpoint learning media developed was in the very good criteria (83%); (4) the results of the response of student trials to the feasibility of the media carried out were initial field trials with very good criteria (92%), small group field trials with very good criteria (84%) and limited group field trials with very good criteria (86%). This shows that the interactive powerpoint learning media theme 1 subtheme 3 animal growth for third grade students of SDN 007 Tebing Karimun is feasible to be used as learning media in the schools. Keywords: Media Development, Interactive Powerpoint, Animal Growth

Elementary Education and Perspective-Taking

Empathy is an emotion that can be cultivated in childhood; as society moves more and more to the online word, however, empathy is needed as people are entering a global economy with people from various backgrounds, cultures, and beliefs. The researchers in this study provided a writing intervention to third grade students in order to promote perspective-taking skills that are displayed through their writing. The researchers developed a rubric to accurately determine the effects of the intervention on student writing and whether or not the students developed empathy for the characters studied. This study informed researchers that above all children make connections with all types of people, despite their differences. In addition to learning about the students, the researchers found that educators would benefit from professional development in order to help them teach students about different cultures and further promote perspective-taking.