OALib Journal
  OALib Journal is an all-in-one open access journal (ISSN Print: 2333-9705, ISSN Online: 2333-9721). It accepts a manuscript for the peer-review processing, typesetting, publication and then allocated to one of the 322 subject areas. The article processing charge for publishing in OALib journal is Only $99. For more details, please contact service@oalib.com. Submit now
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Aug 08, 2022Open    AccessArticle

On Theta Transitivity in a Topological Space with Countable Base

Dana Mawlood Mohammed
In this paper, we have introduced some concepts about topological dynamical systems and proved some new corollary and theorems of transitivity of a theta irresolute function defined on topological space.
Open Access Library J.   Vol.9, 2022
Doi:10.4236/oalib.1104998


Jun 23, 2022Open    AccessArticle

Modeling Vehicle Crash Frequency When Multicollinearity Exists in Vehicle Crash Data: Ridge Regression versus Ordinary Least Squares Linear Regression

Azad Abdulhafedh
Ridge Regression is an important statistical method in modeling vehicle crash frequency when crash data contains collinear predictors. The term multicollinearity refers to the condition in which two or more predictors are highly correlated with one another. This would make the explanatory variables become very sensitive to small changes in the model. Multicollinearity reduces the precision of the estimated coefficients, which weakens the statistical power of the regression model. Common methods ...
Open Access Library J.   Vol.9, 2022
Doi:10.4236/oalib.1108873


Apr 12, 2022Open    AccessArticle

The Phobia and Contentment for Mathematics. What Context Factors Can Do?

Isaac Bengre Taley, Douglas Koranteng Ndamenenu
The enactment of Ghana’s high school mathematics enjoins mathematics teachers to provide well-suited classroom instruction that engages students physically and cognitively. Since learners’ context factors can compromise the instructional efforts of mathematics teachers in delivering the curriculum, this study sought to explore the associations between the levels of students’ mathematics learning and mathematics anxiety with their gender, school type and learning styles. A descriptive survey invo...
Open Access Library J.   Vol.9, 2022
Doi:10.4236/oalib.1108636


Feb 28, 2022Open    AccessArticle

Mathematical Modeling of the HIV-AIDS Epidemic

Roberto Arias, Kevin De Angeles, Shima Maleki, Reza R. Ahangar
A simple subset of an epidemic population model for HIV-AIDS can be split into the following: Susceptible, HIV-Infected, AIDS-infected, and Removed subsets (SHAR). We consider that the rate at which susceptible people become infected is proportional to the number of encounters between susceptible and infected individuals, which is proportional to the product of the two populations. A non-linear model is developed and its solution is produced with an Excel numerical approach using difference equa...
Open Access Library J.   Vol.9, 2022
Doi:10.4236/oalib.1107972


Feb 18, 2022Open    AccessArticle

Comparison between Common Statistical Modeling Techniques Used in Research, Including: Discriminant Analysis vs Logistic Regression, Ridge Regression vs LASSO, and Decision Tree vs Random Forest

Azad Abdulhafedh
Statistical techniques are important tools in modeling research work. However, there could be misleading outcomes if sufficient care is undermined in choosing the right approach. Employing the correct analysis in any research work needs deep knowledge on the differences between these tools. Incorrect selection of the modeling technique would create serious problems during the interpretation of the findings and could affect the conclusion of the study. Each technique has its own assumptions and p...
Open Access Library J.   Vol.9, 2022
Doi:10.4236/oalib.1108414


Sep 30, 2021Open    AccessArticle

A Note on Surface Integrals of Vector Fields

Zhengyuan Wei, Xiaoya Zhou, Jinrong Jiang
Surface integrals of vector fields play an important role in the solutions of natural science and physical science. The Gauss theorem reduces the difficulty of directly computing surface integrals of vector fields. This paper introduces an approach for the computation of integral surfaces in vector fields and obtains a generalized mathematical expression based on Gauss theorem. Moreover, the computation time is investigated by two classical examples.
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107934


Sep 27, 2021Open    AccessArticle

The Asymptotic Expansions of the Largest Eigenvalues in the Presence of a Finite Number of Inclusions

Maroua Gozzi, Abdessatar Khelifi
In this paper, we provide a rigorous derivation of asymptotic formula for the largest eigenvalues using the convergence estimation of the eigenvalues of a sequence of self-adjoint compact operators based on the polarisation tensors of perturbations resulting from the presence of small inhomogeneities reported with numerical tests for the Laplace operator.
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107869


Jun 24, 2021Open    AccessArticle

Recent Cosmological Anisotropy Explained by Dark Energy as Universes of Negative Gravitational Mass

Stéphane Le Corre
A recent publication finds strong evidence for a violation of the Cosmological principle of isotropy across the CMB sky. This analysis revealed three distinct patches in the maps with circularly-averaged sizes between 40 to 70 degrees in radius. These three areas distinguish large-scale deviations from the all-sky mean value of several distinguished cosmological parameters measured separately. In this article, we analyze these results with a previous solution proposed to explained dark energy co...
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107587


May 28, 2021Open    AccessArticle

A Mathematical Model for Covid-19 Disease Transmission Dynamics with Impact of Saturated Treatment: Modeling, Analysis and Simulation

Idisi I. Oke, Yakub T. Oyebo, Olamide F. Fakoya, Vigbe S. Benson, Yusuf T. Tunde
The emergence of novel coronavirus (Covid-19) in 2019 sprung a sudden outbreak across the globe, presenting clinical and public health management challenges which led to global cancellation of conferences, travel restrictions, social distancing and closure of institutions. Thus, in considering the grave implications of the continuous spread of coronavirus disease, a SEIHRD epidemic model was formulated to gain insight into disease transmission dynamics with impacts of proposing control measures....
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107332


May 20, 2021Open    AccessArticle

Certain m-Convexity Inequalities Related to Fractional Integrals with Exponential Kernels

Hao Wang, Zhijuan Wu
In this paper, we establish some mid-point type and trapezoid type inequalities via a new class of fractional integral operators which is introduced by Ahmad et al. We derive a new fractional-type integral identity to obtain Dragomir-Agarwal inequality for m-convex mappings. Moreover, some inequalities of Hermite-Hadamard type for m-convex mappings are given related to fractional integrals with exponential kernels. The results presented provide extensions of those given in earlier works.
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107388


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