Engineering and Applied Science Letters (EASL)

Engineering and Applied Science Letters (EASL) (2617-9709 Online, 2617-9695 Print) is an international and fully open-access journal from the publishers of Ptolemy Research Press. We publish scientifically valid primary research from all areas of the Engineering and Applied Sciences. We publish one volume containing four issues in March, June, September and December each year. The accepted papers will be published online immediately in the currently running issue.

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Latest Published Articles

Estimation of finite population mean of a sensitive variable using three-stage orrt in the presence of non-response and measurement errors

EASL-Vol. 6 (2023), Issue 1, pp. 37 – 48 Open Access Full-Text PDF
Ronald Onyango, Samuel B. Apima and Amos Wanjara

Abstract:The purpose of this study is to present a generalized class of estimators using the three-stage Optional Randomized Response Technique (ORRT) in the presence of non-response and measurement errors on a sensitive study variable. The proposed estimator makes use of dual auxiliary information. The expression for the bias and mean square error of the proposed estimator are derived using Taylor series expansion. The proposed estimator’s applicability is proven using real data sets. A numerical study is used to compare the efficiency of the proposed estimator with adapted estimators of the finite population mean. The suggested estimator performs better than adapted ordinary, ratio, and exponential ratio-type estimators in the presence of both non-response and measurement errors. The efficiency of the proposed estimator of population mean declines as the inverse sampling rate, non-response rate, and sensitivity level of the survey question increase.

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Comparison of the anisotropic and isotropic macroscopic traffic flow models

EASL-Vol. 6 (2023), Issue 1, pp. 26 – 36 Open Access Full-Text PDF
Gabriel Obed Fosu, Gideon K. Gogovi and Joshua K. Asamoah

Abstract:Second-order macroscopic vehicular traffic flow models are categorized under two broad headings based on the direction of their characteristics. Faster-than-vehicle waves are often called isotropic models vis-\'{a}-vis anisotropic models with slower-than-vehicle characteristic speed. The dispute on the supremacy among these families of models is the motivation for this paper. This paper compares and contrasts six distinctive second-order macroscopic models using a numerical simulation and analysis. Three models are characterized by faster-than-vehicle waves with their corresponding anisotropic counterparts. Simulation results on the formation of deceleration waves and the dissolution of acceleration fans are presented to graphically compare the wave profiles of the selected isotropic and anisotropic traffic models. Observably, these opposing models can all characterize these physical traffic phenomena to the same degree. Thus, faster characteristic speed conceptualization of second-order macroscopic equations does not tantamount to model failure but rather lies in the explanation of this property.

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Comparative study of the improved Euler’s method and fadugba-falodun scheme for the solution of second order ordinary differential equation

EASL-Vol. 6 (2023), Issue 1, pp. 19 – 25 Open Access Full-Text PDF
S.E. Fadugba, K.J. Adebayo, A.A. Adeniji and B.O. Falodun

Abstract:In this paper, the comparative study of Fadugba-Falodun Scheme (FFS) and the Improved Euler’s Method (IEM) is presented. IEM and FFS have been used successfully for the solution of second order ordinary differential equation. FFS is a numerical method recently proposed by means of an interpolating function involving a transcendental function of exponential type. In order to discuss the efficiency and accuracy of the two methods, an illustrative example has been presented in the context of the Exact Solution (ES) and the absolute relative errors computed at each mesh point of the integration interval under consideration. The numerical results show that there is no significant difference between the FFS and ES, unlike its counterpart IEM. Hence, FFS is a good numerical method for the solution of the second order initial value problem in ordinary differential equations. All calculations have been carried out via MATLAB (R2014a) in double precision.

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Numerical treatment of a thermoelastic contact problem

EASL-Vol. 6 (2023), Issue 1, pp. 11 – 18 Open Access Full-Text PDF
Youssef Ouafik

Abstract:This paper is devoted to a study of the numerical solution of the thermoelastic model describing the contact problem between the body and a rigid foundation that is thermally conducting. The linear thermoelastic constitutive law describes the behavior of the material. The contact is frictionless and described with Signorini’s condition and a thermal contact condition when the heat exchange coefficient depends on the contact pressure. We aim to present a detailed description of the numerical modeling of the problem. on this end, we use a penalty method to approximate the constraints. Finally, we provide numerical simulations to study a two-dimensional example and compare the penalty problem with the Lagrangian one.

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Minimization of layer feed cost using linear programming

EASL-Vol. 6 (2023), Issue 1, pp. 01 – 10 Open Access Full-Text PDF
Gabriel Obed Fosu, Jones Brefo Konadu, and Michael Yaw Yeboah

Abstract:Poultry farms in Ghana are experiencing a decline, and some are at risk of collapsing due to the high cost of poultry feed. The aim of this paper is to assist poultry farmers in increasing their profits by reducing the cost of poultry feed. The linear programming technique is implemented to utilize locally available feed ingredients to formulate layer feed mix for the various stages of poultry growth, which includes chick mash (starter), grower, and prelayer. Mathematical models are constructed based on the nutrient requirements of the layers, nutrient composition of the available ingredients, and any other restrictions on the available ingredients for the formulation. Seven decision variables and eleven constraints are identified. Compared to the existing practice, it is estimated that the LP model’s optimal solution can reduce feed formulation costs by approximately 30%, 19%, and 14% in chick mash, grower, and prelayer, respectively.

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Engineering and Applied Science Letters (EASL), an international and interdisciplinary open-access scientific journal, publishes regular research papers, short notes and survey papers. Our aim is to encourage scientists to publish their experimental and theoretical researches in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided, so that the results can be reproduced and published.

Subject Areas

Mathematics: Fixed Point Theory, Integrability, Numerical Analysis, Mathematical Physics, Lie groups, Graph Theory, Mathematical Inequalities, Isometry, Topology, Algebra, Geometry,  Stochastic Processes, Boundary Value Problems, Linear Operators, Number Theory, Approximation Theory, Functional Analysis, Information Theory.

Engineering: Electrical engineering, Computer engineering, Electronic engineering, Power Engineering, Mechanical engineering, Manufacturing engineering, Thermal engineering, Automotive engineering, Aerospace engineering, Applied engineering, Automation/Control systems/Robotics, Electronics Engineering, Biomedical engineering, Energy engineering, Industrial engineering, Systems engineering, Mechatronics, Nano engineering, Nuclear engineering, Petroleum engineering, Chemical Engineering, Civil Engineering.

Biology: Bacteriology, Biochemistry, Biodiversity, Bioethics, Bioinformatics, Biomathematics, Biophysics, Biostatistics, Botany, Cell Biology, Conservation, Developmental Biology, Education in Biology & related disciplines, Entomology, Evolutionary Biology, Genetics, Genomics, Immunology, Marine Biology, Mathematical Biology, Medicine, Microbiology, Molecular Biology, Neurobiology, Neuroscience, Ornithology, Paleobiology, Paleontology, Parasitology, Pharmacology, Physiology, Plant Biology, Proteomics, Radiation Biology, Reproductive Biology, Structural Biology, Systems Biology, Virology, Zoology.

Chemistry: Analytical Chemistry, Biochemistry & Biological Chemistry, Bioorganic Crystal Chemistry, Biophysics, Catalysis, Chemical Kinetics & Reactivity, Chemical Physics, Coordination Chemistry, Crystallography, Electrochemistry, Electrochemical Modelling, Environmental Chemistry. EPR Specroscopy, Fluorescence Spectroscopy, Hydrogen Technologies, Hydrogen Storage, Inorganic Chemistry, Macromolecules & Polymers, Materials, NMR Spectroscopy, Nucleation & Growth of new Phases, IR & Raman Spectroscopy, Organic Chemistry, Organometallic Chemistry, Pharmaceutical Chemistry, Photochemistry, Physical Chemistry, Physical Organic Chemistry, Radiochemistry & Nuclear Chemistry, Supramolecular Chemistry & Nanochemistry, Solid State Chemistry, Spectroscopy, Surface Chemistry & Colloids, Thermodynamics, Biomaterials, Natural Product Chemistry, Medicinal Chemistry.

Physics: Acoustics, Astrophysics, Atomic & Molecular Physics, Biological & Medical Physics, Complex Networks, Socio- & Econophysics, Computational Physics, Condensed Matter Physics, Cosmology & Gravitation, Fluid Mechanics, Geophysics, Nanophysics, Optics & Lasers, Particle & Nuclear Physics, Plasma Physics, Statistical & Nonlinear Physics, Surface Physics, Theoretical & Mathematical Physics.

There is no article processing or publication charges. This journal is free for both authors and readers.

ISSN 2617-9709 (online)

ISSN 2617-9695 (Print)

Key title: Engineering and Applied Science Letters

Abbreviated key title: Eng. Appl. Sci. Lett.

Parallel title: EASL

Editor in Chief

Hari Mohan Srivastava
Department of Mathematics and Statistics, University of Victoria, Victoria, British Columbia V8W 3R4, Canada
Muhammad Imran
Department of Mathematics, GC University, Faisalabad, Pakistan

 

Managing Editors

Applied Sciences

Waqas Nazeer
University of Education, Lahore Pakistan
E-mail: easl@pisrt.org – nazeer.waqas@ue.edu.pk

Engineering

Farhan Ammar Ahmad
University of Management and Technology, Pakistan
E-mail: engr.easl@pisrt.org – farhan.sayal@post.umt.edu.pk

 

Associate Editors

  • Oscar Valero
    Departament de Ciències Matemàtiques i Informàtica, Universitat de les Illes Balears, Ctra. de Valldemossa km. 7.5, 07122, Palma, Spain
    Institut d’Investigació Sanitària Illes Balears (IdISBa), Ctra. de Valldemossa, 79, 07120, Palma, Spain
  • Snezhana G. Hristova
    Plovdiv University, Tzar Asen 24, 4000, Plovdiv, Bulgaria
  • Nilanjan De
    Calcutta Institute of Engineering and Management, India
  • Gbeminiyi Musibau Sobamowo
    University of Lagos, Nigeria
  • Sunday Joshua Ojolo
    University of Lagos, Nigeria
  • Asim Ghalib
    University of Central Florida (UCF), Orlando, Florida, USA
  • Muhammad Altaf Khan
    City University of Science and Information Technology Peshawar Pakistan
  • Adnan Aslam
    University of Engineering and Technology, Pakistan
  • Muhammad Ishaq
    National University of Sciences and Technology (NUST), Pakistan
  • Muhammad Athar
    Division of Science and Technology, University of Education, Pakistan
  • Ebenezer Bonyah
    Information Technology Education, University of Education, Winneba(Kumasi Campus) Ghana
  • Hamood ur Rehman
    Department of Mathematics, University of Okara, Okara, Pakistan
  • Qamar Din
    Department of Mathematics, The University of Poonch Rawalakot, Pakistan
  • Zohaib Zahid
    University of Management and Technology, Pakistan
  • Faisal Nadeem
    COMSATS University of Islamabad, Pakistan
  • Muhammad Mujtaba Asad
    Universiti Tun Hussein Onn, Malaysia
  • Saifullah Shafiq
    Prince Mohammad Bin Fahd University (PMU), Khobar, Saudi Arabia
  • Rabe Arshad
    University of British Columbia, Canada
  • Zakia HAMMOUCH
    Faculty of Sciences and Techniques Moulay Ismail University, Errachidia, Morocco
  • Junaid Haseeb
    Victoria University of Wellington, New Zealand
  • Zahid Ullah
    University of Management and Technology, Pakistan
  • Muhammad Kashif Shahzad
    Institute of Refrigeration and Cryogenics, College of Energy Engineering, Zhejiang University, China
  • Yilun Shang
    Department of Computer and Information Sciences, Northumbria University, UK
  • Jia-Bao Liu

    School of Mathematics and Physics, Anhui Jianzhu University, Hefei 230601, P.R. China
  • Isaac Lare Animasaun
    Department of Mathematical Sciences, The Federal University of Technology, Akure, Ondo State, Nigeria, West Africa.

The contents of the Engineering and Applied Science Letter (EASL) downloaded free from the website and for the print copy of the journal the charges are 550USD.

Articles should be sent (by e-mail) to the Managing Editor (easl@pisrt.org).