i-manager's Journal on Mathematics (JMAT)


Volume 12 Issue 2 July - December 2023

Research Paper

Statistical Analysis on Job Satisfaction of Academic Staff at College of Natural Science in Jimma University, Ethiopia: A Cross-Sectional Study

Abdu Hailu Shibesh* , Agatamudi Lakshmana Rao**, Saripalli Arun Kumar***
* Department of Statistics, College of Natural & Computational Science, Samara University, Ethiopia.
**-*** Department of Mathematics, AITAM Engineering College, Tekkali, Andhra Pradesh, India.
Shibesh, A. H., Rao, A. L., and Kumar, S. A. (2023). Statistical Analysis on Job Satisfaction of Academic Staff at College of Natural Science in Jimma University, Ethiopia: A Cross-Sectional Study. i-manager’s Journal on Mathematics, 12(2), 1-11. https://doi.org/10.26634/jmat.12.2.19817

Abstract

Job satisfaction is an attitude that is the outcome of balancing and summarizing of numerous individual likes and dislikes that an employee experiences while performing his or her job. People's wants and requirements are always changing and rising in modern society; when these needs are not met, people get unhappy. The purpose of this study was to assess the level of job satisfaction among academic staff members at Jimma University College of Natural Science. A crosssectional study design was used in this research. The subjects who were involved in the study were 280 academic staff members in College of Natural Science. The study used both descriptive and inferential statistics method of data analysis, which means from descriptive statistics frequency table, cross tab, and from inferential statistics chi-square test of association and Ordinary Logistic Regression have been used. Most of the academic staff members are moderately satisfied with their job, P-value=0.000 indicates there is enough evidence to reject the null hypothesis at α=5% level of significance. Then there is a association between employees, ages and job satisfaction and P-value=0.000 indicates there is relationship between the level of job satisfaction and relationship of employees who work in college of Natural science. Mean level of job satisfaction of the employees depends on the relationships of academic staff members. Age, relationship with workers, work environment, education level, and monthly salary shows relationship with the level of job satisfaction. Academic staff members are not very satisfied with their job due to monthly salary, employment, scarcity of time, and educational level.

Research Paper

Tolerance Based Rough Algebras Induced by Blocks

N. Kishore Kumar* , M. P. K. Kishore**, S. K. Vali***
* Department of Mathematics, Raghu Engineering College, Visakhapatnam, Andhra Pradesh, India.
** Gayatri Vidya Parishad College of Engineering (A), Visakhapatnam, Andhra Pradesh, India.
*** Department of Mathematics, Andhra University, Visakhapatnam, Andhra Pradesh, India.
Kumar, N. K., Kishore, M. P. K., and Vali, S. K. (2023). Tolerance Based Rough Algebras Induced by Blocks. i-manager’s Journal on Mathematics, 12(2), 12-21. https://doi.org/10.26634/jmat.12.2.20136

Abstract

The theory of rough sets has been classified into several directions where the information granules are generated using tolerances, pre-orders and binary relations. Maximal Compatibility Block (MCB) plays an important role in case of tolerance relations. In the present work, the lattice structure of rough sets generated by MCBs is explored. The concepts are applied to establish equivalence between the isomorphism of graphs with isomorphism of rough lattices constructed using MCBs.

Research Paper

Significance of Thermal Boundary Layer Analysis of MHD Chemically Radiative Dissipative Casson Nanofluid Flow over a Stretching Sheet with Heat Source

Seetharam Karanamu* , Jayaramireddy Konda**, Shaik Kalesha Vali***
* Department of Mathematics, Aditya Institute of Technology and Management, Tekkali, Srikakulam, Andhra Pradesh. India.
** Science City, Government of Andhra Pradesh, Tadepalli, Guntur District, Andhra Pradesh, India.
*** Department of Basic Science & Humanities and Social Sciences, JNTUK University College of Engineering Vizianagaram, Dwarapudi, Vizianagaram, Andhra Pradesh, India.
Karanamu, S., Konda, J., and Vali, S. K. (2023). Significance of Thermal Boundary Layer Analysis of MHD Chemically Radiative Dissipative Casson Nanofluid Flow over a Stretching Sheet with Heat Source. i-manager’s Journal on Mathematics, 12(2), 22-35. https://doi.org/10.26634/jmat.12.2.19826

Abstract

A mathematical model that incorporates thermal emission, glutinous indulgence, heat source/sink, substance response, with suction was used to learn the MHD pour of Casson nanofluid in excess of a nonlinearly porous stretched page. There are a series of nonlinear ordinary differential equations that govern the biased differential equations through proper resemblance transformations, as well as then solved by the Homotopy Analysis Approach (HAM). Numerical data and plots are employed to examine the physical limitations on liquid speed, heat, and attentiveness. To examine the flow characteristics at the wall, the skin friction coefficients, local Nusselt digit, and Sherwood numbers are in addition evaluated. With much acclaim, a link between penetrable findings for specific cases is discovered.

Research Paper

Transient Analysis of M/M/1 Fractional Queue

Nanduri Sujatha* , G. V. S. R. Deekshitulu**
* Department of Mathematics, Aditya Engineering College, Surampalem, Kakinada, India.
** Department of Mathematics, University College of Engineering, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India.
Sujatha, N., and Deekshitulu, G. V. S. R. (2023). Transient Analysis of M/M/1 Fractional Queue. i-manager’s Journal on Mathematics, 12(2), 36-45. https://doi.org/10.26634/jmat.12.2.20067

Abstract

Queuing models consisting of servers which may not work with full efficiency are modelled with the help of fractional differential equations. Such problems with partial activity of the server are designed with the help of differentialdifference equations involving fractional derivatives whose solutions are expressed in terms of Mittag-Leffler function. In this paper, we propose an alternative approach which gives a transient solution of fractional M/M/1 queue in matrix form. The results obtained by this new approach are justified by comparing them with solutions of classical queue which are available in the literature. Efficacy of the model can be assessed by computing its state probabilities and also measures such as expected number of customers in the system etc. Also, the variations in these measures with respect to partial activity of the server have been presented graphically and numerically. Further, a mathematical procedure to find optimal efficiency of the server has been discussed.

Research Paper

A Novel Multi-Viewpoints Based Cosine Similarity Visual Technique for an Effective Assessment of Clustering Tendency

Rajasekhar Pinisetty* , Ravindranath Vandrangi**
*-** Department of Mathematics, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India.
Pinisetty, R., and Vandrangi, R. (2023). A Novel Multi-Viewpoints Based Cosine Similarity Visual Technique for an Effective Assessment of Clustering Tendency. i-manager’s Journal on Mathematics, 12(2), 46-55. https://doi.org/10.26634/jmat.12.2.19803

Abstract

Data clustering is an unsupervised technique that can be used to partition the data into groups based on the similarities of the retrieved objects using different distance metrics like Euclidean, cosine, etc. In contrast to Euclidean, the cosine computes the object's similarity by considering both the magnitude and direction of the data vectors. As a result, it performed far better than a standard Euclidean distance metric in applications involving real-time data clustering. The initial k-value (clustering tendency) is required by top clustering techniques like k-means and hierarchical approaches to determine the clusters' quality. Users with knowledge can assign the k-value. However, sometimes the right k-value in such algorithms may need to be assigned. After a thorough review of the work, it was discovered that the visual technique known as visual assessment of (cluster) tendency (VAT) effectively addresses the clustering tendency issue. It uses the Euclidean metric to find the similarity features in its algorithm. Another enhanced visual technique, cosinebased VAT (cVAT), outperformed the VAT for text data and speech clustering applications. However, the similarity features are extracted about a single viewpoint in cVAT. This paper develops the multi-viewpoints-based cosine similarity measure (MVPCSM) for a more informative assessment. Instead of using a single reference point like a typical cosine measure, the MVPCSM generates precise similarity characteristics using several views. The performance of the existing and proposed technique (MVPCSM-VAT) is evaluated using clustering accuracy (CA) and normalized mutual information (NMI). It has been demonstrated that the proposed MVPCSM-VAT is 15-25% more efficient than VAT and cVAT in terms of the parameters of CA and NMI. The proposed method successfully obtains more quality data clusters than MVS-VAT.