Abstract: The use of N'–(1–(pyridin–2–yl)ethylidene)nicotinohydrazide (HL) in Yttrium (III) chemistry has yielded dinuclear complex. The 1:1 Y(CH₃COO)₃.6H₂O/HL in methanol afforded the complex {[Y(L)(h²–OOCCH₃)(H₂O)](h¹:h²:µ–OOCCH₃)₂[Y(L)(h²–OOCCH₃)(H₂O)]}. The structure of the complex were solved by single crystal X–ray crystallography. In the complex the Y³⁺ atoms are doubly bridged by two acetates anions and each metal ion is coordinated by one tridentate monodeprotonated molecule ligand, one bidentate acetate group and one coordinated water molecule. Each Y³⁺ atom is nine–coordinated with an environment best described as a tricapped prismatic geometry. Complex crystallizes in the monoclinic space group P2₁/n with the following parameters : a = 11.3775(11) Å, b = 14.2462(16) Å, c = 12.0082(12) Å, ꞵ = 100.728(10)°,    V = 1912.3(3) ų, Z = 8, R₁ = 0.0345, wR₂ = 0.0797. The supramolecular structures are consolidated by multiple hydrogen bonds.

Keywords: Schiff base, dinuclear complex, Yttrium, tricapped prism.

Title: Crystal structure of Y(III) Complex with the Tridentate Schiff Base Ligand N'– (1–(pyridin–2–yl)ethylidene)nicotinohydrazide

Author: Moussa Faye, Mbosse Ndiaye Gueye, Moussa Dieng, Farba Bouyagui Tamboura, Mohamed Gaye

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 60-66

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 28-April-2023

Abstract: The inhibitory effects of Eucalyptus camaldulensis bark extract on the corrosion of mild steel in a nitric acid medium were investigated through weight loss measurement. Eucalyptus camaldulensis, commonly referred to as the river red gum, is a flowering plant species of the Myrtaceae family. The research found that the bark extract had the highest efficiency at a concentration of 0.8g/l and a temperature of 303K, with a 59.34% inhibition rate. The study also showed that the inhibition rate increased with higher concentrations of the inhibitor but decreased with higher temperatures, suggesting that physical adsorption mechanisms were involved.

Keywords: Corrosion inhibitor, Eucalyptus camaldulensis, Inhibition efficiency, Mild steel, Nitric acid medium and Weight loss measurement.

Title: Investigation on the Corrosion Inhibition of Eucalyptus Camaldulensis Bark Extract on Mild Steel in Nitric Acid Medium

Author: Muhammad Yahaya Abdullahi, Salim Aliyu Yusuf, Abubakar Suraja Ibrahim, Sadiq Fahad Ahmad

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 52-59

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 24-April-2023

Abstract: The paper analyzes the effects of the Reynolds number variation on mixed convective heat and mass transfer over a parabolic surface under a radial magnetic field cutting perpendicular along the fluid flow in presence of a constant radiation heat source. The governing partial differential equations are transformed into a system of ordinary differential equation using non-dimensional numbers. The resulting system of ordinary differential equations together with the boundary equations are then solved numerically by finite difference method and simulated using MATLAB to obtain the profiles of the flow variables. The influence of thermal Grashof number ( ), Mass Grashof number ( ), and Magnetic Parameter ( ) on the flow velocity, temperature and concentration profiles are displayed in graphs for different values of the fluid parameters entering into the control volume numerically discussed and conclude. The study concludes that increasing the Reynolds number results to a reduction in heat and mass transfer and impairs the motion of the nanofluid. An increase in the Grashof number ( ), Mass Grashof number ( ) results to an increase in the flow velocity which negatively impairs the mixing and heat exchange in the nanofluid thus resulting to a decrease in heat and mass transfer. Increasing the Magnetic Parameter ( ) leads to an increase in the resistance to the flow of the nanofluid thus reducing the fluid velocity. However, the resistance favors heat and mass transfer as enough time is given for heat exchange and mixing to take place.

Keywords: Concentration Boundary Layer, Heat Transfer, Mass Transfer, Magneto-Hydrodynamics (MHD), Nanofluid, Photovoltaic Solar Collector, Thermal Boundary Layer, Velocity Boundary Layer.

Title: EFFECTS OF REYNOLDS NUMBER VARIATION ON HEAT AND MASS TRANSFER FOR MHD FLOW IN A CONCENTRATED PARABOLIC THERMAL SOLAR COLLECTOR

Author: Lucas Khaoya Mukwabi, Dr. Mark Kimathi, Dr. Charles Muli

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 38-51

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 06-April-2023

Abstract: This research paper investigates the effects of Thermophoresis and Brownian motion parameter variation on heat and mass transfer on MHD nanofluid flow in a parabolic thermal solar collector. The effect of laminar flow which is occasioned by a variation in the Brownian motion and Thermophoresis parameter over a parabolic shaped photovoltaic surface has been investigated numerically. The model used for the nanofluid flow incorporates the effects of Brownian motion and thermophoresis parameter variation with thermal variation due to solar radiation in the presence of an induced magnetic field cutting perpendicular across the flow. The governing equations of the MHD fluid flow are presented and solved using the finite element method. The results show that increasing the Thermophoresis  and Brownian motion parameters  lead to an increase in heat transfer and a decrease in mass transfer. Similarly, an increase in the Peclet number  favors mass transfer but impairs heat transfer. A comparison of the results with existing literature has been done and a remarkable agreement established.

Keywords: Brownian Motion, Concentration Boundary Layer, Heat Transfer, Mass Transfer, Magneto-Hydrodynamics (MHD), Nanofluid, Photovoltaic Solar Collector, Thermal Boundary Layer, Thermophoresis, Velocity Boundary Layer.

Title: EFFECTS OF BROWNIAN MOTION AND THERMOPHORESIS VARIATION ON MHD NANOFLUID FLOW IN A CONCENTRATED PARABOLIC THERMAL SOLAR COLLECTOR

Author: Lucas Khaoya Mukwabi, Dr. Mark Kimathi, Dr. Charles Muli

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 25-37

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 06-April-2023

Abstract: We have comparatively assessed five regression performance metrics namely, Mean Absolute Error, Mean Square Error, Root Mean Square Error, R2  and adjusted R2 . A total of twelve datasets were used for the study inclusive of nine real-world datasets and three simulated datasets. Apart from the R2  and Adjusted R2 , analysis shows that the output of other performance metrics are not data dependent. Regarding the simulated datasets which complied with all the regression model assumptions, we discovered that any of the five performance metrics can be used on the data, to assess the strength or otherwise of a regression model. This is based on the fact that the individual outputs of the performance metrics on simulated data are identical.

Keywords: Regression, Multiple Regression, Performance Metrices for Regression, Machine Learning.

Title: A Comparative, Data-Based Assessment of Several Performance Metrics for Regression

Author: Jude Chukwura Obi, Obimuanya Ijeoma

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 20-24

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 10-March-2023

Abstract: Melioidosis is an infectious disease caused by Burkoldera pseudomallei bacteria. In this study, we have developed a Mathematical model on the effects of disinfection and treatment on the transmission of Melioidosis. From analyzing how disinfection and treatment affect different compartments, we have demonstrated that varying the rate of these two control measures will vary the rate of transmission of melioidosis disease. The R₀ was developed and the model stability and the existence of equilibrium points determined. From the quantitative analysis of the study, it was found that the local stability existed when R₀ <1. The D.F.E is also globally stable when R₀ <1. The numerical analysis determined that disinfecting the environment and treating the infected reduces the rate of infection of the disease.

Keywords: Melioidosis, Modelling, disinfection, treatment, stability, transmission, contamination, stability, equilibrium.

Title: Mathematical Model on the Effect of Disinfection and Treatment on the Transmission of Melioidosis

Author: Joseph Ochieng Obuya, Brian Nyanaro Nyasagare, Okumu Argan Wekesa

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 10-19

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 07-February-2023

Abstract: In this paper, based on a new multiplication of fractional analytic functions, we study a fractional function equation. Using some methods, we can obtain the solution of this fractional function equation. In fact, the solution is a generalization of the result in traditional function equation.    

Keywords: New multiplication, Fractional analytic functions, Fractional function equation.

Title: Study of a Fractional Function Equation

Author: Chii-Huei Yu

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 6-9

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 28-January-2023

Abstract: The homogeneous ternary second degree equation given by x²+y²=122z² is analysed for its  non-zero distinct integral points on that. Completely various patterns of the equation into consideration are obtained.

Keywords: Ternary, quadratic, Integer solutions, Homogeneous, Diophantine.

Title: SECOND DEGREE HOMOGENEOUS DIOPHANTINE EQUATION WITH THREE UNKNOWNS x²+y²=122z²

Author: K HEMA

International Journal of Novel Research in Physics Chemistry & Mathematics

ISSN 2394-9651

Vol. 10, Issue 1, January 2023 - April 2023

Page No: 1-5

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 03-January-2023