Subjects -> ENGINEERING (Total: 2688 journals)
    - CHEMICAL ENGINEERING (229 journals)
    - CIVIL ENGINEERING (237 journals)
    - ELECTRICAL ENGINEERING (176 journals)
    - ENGINEERING (1325 journals)
    - ENGINEERING MECHANICS AND MATERIALS (452 journals)
    - HYDRAULIC ENGINEERING (56 journals)
    - INDUSTRIAL ENGINEERING (98 journals)
    - MECHANICAL ENGINEERING (115 journals)

ENGINEERING (1325 journals)            First | 1 2 3 4 5 6 7 | Last

Showing 601 - 800 of 1205 Journals sorted alphabetically
International Journal of Quality Assurance in Engineering and Technology Education     Full-text available via subscription   (Followers: 3)
International Journal of Quality Engineering and Technology     Hybrid Journal   (Followers: 4)
International Journal of Quantum Information     Hybrid Journal   (Followers: 6)
International Journal of Rapid Manufacturing     Hybrid Journal   (Followers: 3)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
International Journal of Reliability, Quality and Safety Engineering     Hybrid Journal   (Followers: 14)
International Journal of Renewable Energy Technology     Hybrid Journal   (Followers: 8)
International Journal of Robust and Nonlinear Control     Hybrid Journal   (Followers: 10)
International Journal of Science and Innovative Technology     Open Access  
International Journal of Science Engineering and Advance Technology     Open Access  
International Journal of Sediment Research     Full-text available via subscription   (Followers: 2)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal  
International Journal of Service Science, Management, Engineering, and Technology     Full-text available via subscription   (Followers: 2)
International Journal of Signal and Imaging Systems Engineering     Hybrid Journal  
International Journal of Six Sigma and Competitive Advantage     Hybrid Journal   (Followers: 4)
International Journal of Social Robotics     Hybrid Journal   (Followers: 3)
International Journal of Software Engineering and Knowledge Engineering     Hybrid Journal   (Followers: 6)
International Journal of Space Science and Engineering     Hybrid Journal   (Followers: 13)
International Journal of Speech Technology     Hybrid Journal   (Followers: 7)
International Journal of Spray and Combustion Dynamics     Full-text available via subscription   (Followers: 15)
International Journal of Student Project Reporting     Hybrid Journal   (Followers: 4)
International Journal of Surface Engineering and Interdisciplinary Materials Science     Full-text available via subscription   (Followers: 1)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 6)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 4)
International Journal of Sustainable Lighting     Open Access  
International Journal of Sustainable Manufacturing     Hybrid Journal   (Followers: 4)
International Journal of Systems and Service-Oriented Engineering     Full-text available via subscription  
International Journal of Systems Assurance Engineering and Management     Hybrid Journal  
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 6)
International Journal of Technoethics     Full-text available via subscription   (Followers: 2)
International Journal of Technology Management and Sustainable Development     Hybrid Journal   (Followers: 1)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 6)
International Journal of Telemedicine and Applications     Open Access   (Followers: 4)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 18)
International Journal of Thermodynamics     Open Access   (Followers: 15)
International Journal of Transportation Engineering     Open Access   (Followers: 2)
International Journal of Turbomachinery, Propulsion and Power     Open Access   (Followers: 23)
International Journal of Ultra Wideband Communications and Systems     Hybrid Journal  
International Journal of Vehicle Autonomous Systems     Hybrid Journal  
International Journal of Vehicle Design     Hybrid Journal   (Followers: 6)
International Journal of Vehicle Information and Communication Systems     Hybrid Journal   (Followers: 1)
International Journal of Vehicle Noise and Vibration     Hybrid Journal   (Followers: 6)
International Journal of Vehicle Safety     Hybrid Journal   (Followers: 3)
International Journal of Virtual Technology and Multimedia     Hybrid Journal   (Followers: 2)
International Journal of Wavelets, Multiresolution and Information Processing     Hybrid Journal  
International Journal on Artificial Intelligence Tools     Hybrid Journal   (Followers: 9)
International Journal on Smart Sensing and Intelligent Systems     Open Access  
International Nano Letters     Open Access   (Followers: 6)
International Review of Applied Sciences and Engineering     Full-text available via subscription  
International Scholarly Research Notices     Open Access   (Followers: 122)
International Scientific and Vocational Studies Journal     Open Access  
International Scientific Journal of Engineering and Technology (ISJET)     Open Access  
Inventions     Open Access  
Inventum     Open Access  
Inverse Problems in Science and Engineering     Hybrid Journal   (Followers: 3)
Investiga : TEC     Open Access  
Ionics     Hybrid Journal   (Followers: 2)
IPTEK The Journal for Technology and Science     Open Access  
Iranian Journal of Optimization     Open Access   (Followers: 2)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
IRBM News     Full-text available via subscription  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 4)
ISA Transactions     Full-text available via subscription  
ISSS Journal of Micro and Smart Systems     Hybrid Journal   (Followers: 3)
IT Professional     Full-text available via subscription   (Followers: 24)
Iteckne     Open Access  
J-ENSITEC : Journal Of Engineering and Sustainable Technology     Open Access   (Followers: 4)
Johnson Matthey Technology Review     Open Access  
Journal of Advanced College of Engineering and Management     Open Access  
Journal of Advanced Joining Processes     Open Access  
Journal of Advanced Manufacturing Systems     Hybrid Journal   (Followers: 5)
Journal of Aerodynamics     Open Access   (Followers: 27)
Journal of Aerosol Science     Hybrid Journal   (Followers: 7)
Journal of Aerospace Engineering     Full-text available via subscription   (Followers: 66)
Journal of Alloys and Compounds     Hybrid Journal   (Followers: 16)
Journal of Analytical and Applied Pyrolysis     Hybrid Journal   (Followers: 5)
Journal of Analytical Science & Technology     Open Access   (Followers: 4)
Journal of Analytical Sciences, Methods and Instrumentation     Open Access   (Followers: 4)
Journal of Applied Engineering Sciences     Open Access  
Journal of Applied Physics     Hybrid Journal   (Followers: 69)
Journal of Applied Research and Technology     Open Access  
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences     Open Access   (Followers: 4)
Journal of Architectural and Engineering Research     Open Access   (Followers: 3)
Journal of Architectural Engineering     Full-text available via subscription   (Followers: 4)
Journal of Automation and Control     Open Access   (Followers: 9)
Journal of Aviation Technology and Engineering     Open Access   (Followers: 10)
Journal of Biological Dynamics     Open Access   (Followers: 1)
Journal of Biomedical Science     Open Access   (Followers: 4)
Journal of Biomolecular NMR     Hybrid Journal   (Followers: 6)
Journal of Biosciences     Open Access   (Followers: 1)
Journal of Building Pathology and Rehabilitation     Hybrid Journal  
Journal of Catalysis     Hybrid Journal   (Followers: 11)
Journal of Catalyst & Catalysis     Full-text available via subscription   (Followers: 2)
Journal of Central South University     Hybrid Journal   (Followers: 1)
Journal of Chemical and Petroleum Engineering     Open Access   (Followers: 1)
Journal of China Coal Society     Open Access  
Journal of China Universities of Posts and Telecommunications     Full-text available via subscription  
Journal of Cleaner Production     Hybrid Journal   (Followers: 27)
Journal of Coastal and Riverine Flood Risk (JCRFR)     Open Access   (Followers: 1)
Journal of Cold Regions Engineering     Full-text available via subscription   (Followers: 3)
Journal of Combinatorial Designs     Hybrid Journal   (Followers: 4)
Journal of Combustion     Open Access   (Followers: 40)
Journal of Computational and Nonlinear Dynamics     Full-text available via subscription   (Followers: 6)
Journal of Computational and Theoretical Nanoscience     Full-text available via subscription  
Journal of Computational Biology     Hybrid Journal   (Followers: 9)
Journal of Computational Design and Engineering     Open Access   (Followers: 1)
Journal of Computational Electronics     Hybrid Journal   (Followers: 5)
Journal of Computational Multiphase Flows     Open Access   (Followers: 1)
Journal of Computing and Information Science in Engineering     Full-text available via subscription   (Followers: 1)
Journal of Coupled Systems and Multiscale Dynamics     Full-text available via subscription  
Journal of Dairy Science     Open Access   (Followers: 12)
Journal of Delta Urbanism     Open Access   (Followers: 2)
Journal of Display Technology     Hybrid Journal   (Followers: 3)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 14)
Journal of Dynamical and Control Systems     Hybrid Journal   (Followers: 7)
Journal of Earthquake Engineering     Hybrid Journal   (Followers: 14)
Journal of Elasticity     Hybrid Journal   (Followers: 7)
Journal of Electroceramics     Hybrid Journal  
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 10)
Journal of Electronic Testing     Hybrid Journal   (Followers: 2)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 9)
Journal of Electrostatics     Hybrid Journal   (Followers: 2)
Journal of Energy Engineering     Full-text available via subscription   (Followers: 7)
Journal of Energy Resources Technology     Full-text available via subscription   (Followers: 4)
Journal of Engineering     Open Access  
Journal of Engineering     Open Access   (Followers: 1)
Journal of Engineering and Applied Science     Open Access  
Journal of Engineering and Technological Sciences     Open Access   (Followers: 2)
Journal of Engineering Design     Hybrid Journal   (Followers: 17)
Journal of Engineering Education     Hybrid Journal   (Followers: 7)
Journal of Engineering for Gas Turbines and Power     Full-text available via subscription   (Followers: 15)
Journal of Engineering Mathematics     Hybrid Journal   (Followers: 2)
Journal of Engineering Mechanics     Full-text available via subscription   (Followers: 16)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 2)
Journal of Engineering Research     Open Access   (Followers: 1)
Journal of Engineering Research and Reports     Open Access  
Journal of Engineering Technology and Applied Sciences     Open Access  
Journal of Engineering Thermophysics     Hybrid Journal   (Followers: 4)
Journal of Engineering, Design and Technology     Hybrid Journal   (Followers: 17)
Journal of Engineering, Project, and Production Management     Open Access  
Journal of Environmental & Engineering Geophysics     Hybrid Journal   (Followers: 2)
Journal of Environmental Engineering     Full-text available via subscription   (Followers: 49)
Journal of Environmental Engineering and Landscape Management     Open Access   (Followers: 8)
Journal of Environmental Engineering and Science     Hybrid Journal   (Followers: 2)
Journal of Experimental Nanoscience     Hybrid Journal  
Journal of Fire Sciences     Hybrid Journal   (Followers: 6)
Journal of Flood Risk Management     Hybrid Journal   (Followers: 14)
Journal of Flow Control, Measurement & Visualization     Open Access   (Followers: 1)
Journal of Fluids Engineering     Full-text available via subscription   (Followers: 30)
Journal of Fourier Analysis and Applications     Hybrid Journal   (Followers: 3)
Journal of Fuel Cell Science and Technology     Full-text available via subscription   (Followers: 2)
Journal of Functional Analysis     Full-text available via subscription   (Followers: 3)
Journal of Fundamental and Applied Sciences     Open Access  
Journal of Geological Research     Open Access   (Followers: 1)
Journal of Geotechnical and Geoenvironmental Engineering     Full-text available via subscription   (Followers: 30)
Journal of Geotechnical Engineering     Full-text available via subscription   (Followers: 4)
Journal of Geovisualization and Spatial Analysis     Hybrid Journal  
Journal of Global Optimization     Hybrid Journal   (Followers: 6)
Journal of Graduate School of Natural and Applied Sciences of Mehmet Akif Ersoy University     Open Access  
Journal of Hazardous Materials Advances     Open Access  
Journal of Healthcare Engineering     Open Access   (Followers: 3)
Journal of Heat Transfer     Full-text available via subscription   (Followers: 66)
Journal of Humanitarian Engineering     Open Access   (Followers: 1)
Journal of Hydraulic Engineering     Full-text available via subscription   (Followers: 27)
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 23)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Industrial and Production Engineering     Hybrid Journal   (Followers: 4)
Journal of Industrial Engineering and Management     Open Access   (Followers: 5)
Journal of Industrial Safety Engineering     Full-text available via subscription   (Followers: 6)
Journal of Inequalities and Applications     Open Access  
Journal of Infrared, Millimeter and Terahertz Waves     Hybrid Journal   (Followers: 3)
Journal of Infrastructure Preservation and Resilience     Open Access   (Followers: 1)
Journal of Institute of Science and Technology     Open Access  
Journal of Intelligent and Connected Vehicles     Open Access   (Followers: 1)
Journal of Intelligent Systems : Theory and Applications     Open Access  
Journal of International Maritime Safety, Environmental Affairs, and Shipping     Open Access   (Followers: 1)
Journal of Iron and Steel Research International     Hybrid Journal   (Followers: 7)
Journal of Irrigation and Drainage Engineering     Full-text available via subscription   (Followers: 24)
Journal of King Saud University - Engineering Sciences     Open Access  
Journal of KONBiN     Open Access   (Followers: 4)
Journal of Liquid Chromatography & Related Technologies     Hybrid Journal   (Followers: 7)
Journal of Management in Engineering     Full-text available via subscription   (Followers: 9)
Journal of Manufacturing Science and Engineering     Full-text available via subscription   (Followers: 32)
Journal of Manufacturing Systems     Full-text available via subscription   (Followers: 3)
Journal of Manufacturing Technology Management     Hybrid Journal   (Followers: 3)
Journal of Mechanical Design and Testing     Open Access   (Followers: 4)
Journal of Mechatronics     Full-text available via subscription   (Followers: 3)
Journal of Mega Infrastructure & Sustainable Development     Hybrid Journal  
Journal of Metallurgy     Open Access   (Followers: 8)
Journal of Mining Institute     Open Access  
Journal of Motor Behavior     Hybrid Journal   (Followers: 8)
Journal of Multivariate Analysis     Hybrid Journal   (Followers: 15)
Journal of Nanoengineering and Nanomanufacturing     Full-text available via subscription  
Journal of Nanoparticle Research     Hybrid Journal   (Followers: 3)
Journal of Nanoscience     Open Access  
Journal of Nanoscience and Nanotechnology     Full-text available via subscription   (Followers: 8)
Journal of NanoScience, NanoEngineering & Applications     Full-text available via subscription  
Journal of Nanotechnology     Open Access   (Followers: 10)
Journal of Nanotechnology in Engineering and Medicine     Full-text available via subscription   (Followers: 4)

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Similar Journals
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Iranian Journal of Science and Technology, Transactions A : Science
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1028-6276 - ISSN (Online) 2364-1819
Published by Springer-Verlag Homepage  [2469 journals]
  • Quantum Effects on Modulational Amplification Characteristics of
           Semiconductor Magneto-Plasmas

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      Abstract: Using quantum hydrodynamic model, quantum effects (via Bohm potential) on modulational amplification characteristics of semiconductor magneto-plasmas are investigated. Expressions are obtained for the threshold pump amplitude and the growth rate of modulated beam with including and excluding quantum effects. Numerical analysis is performed for n-InSb/CO2 laser system. The dependence of the threshold pump amplitude and the growth rate of modulated beam on wave number, applied magnetic field, and plasma carrier concentration are explored. The lowering in threshold pump amplitude and enhancement of growth rate of modulated beam are observed by incorporating the quantum effects. The analysis provides detailed information of quantum effects on semiconductor magneto-plasmas and establishes the technological potentiality of semiconductor magneto-plasmas as the hosts for fabrication of efficient optical modulators.
      PubDate: 2022-05-16
       
  • Assessment of Annual Effective Dose and Excess Lifetime Cancer Risk in
           Grain Samples Collected from Kerbala Governorate, Iraq

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      Abstract: Natural radioactivity for gamma emitters (specific activity 238U, 232Th, and 40K) using NaI(Tl) detectors and alpha emitters (concentrations of 222Rn, 226Ra, and 238U) using CR-39 detector was determined in some grains samples that collected from Kerbala Governorate markets, Iraq. Also, annual effective dose and some radiological parameters due to gamma and alpha emitters to assess the health risk were calculated. The results show that the average value of specific activity with (S.E) for 238U was 6.61 ± 0.91 Bq/kg, for 232Th was 3.07 ± 0.22 Bq/kg, and for 40K was 227.59 ± 32.34 Bq/kg. while the average value of alpha emitters concentrations for 222Rn, 226Ra, and 238U were 3.99 ± 1.13 Bq/m3, 4.69 ± 1.28 mBq/kg and 0.072 ± 0.019 Bq/kg respectively. The results of average total annual effective dose associated with the exposure due to gamma and alpha emitted from ingestion grain samples in the present study were 0.139 ± 0.013 mSv/y and 0.172 ± 0.047 µSv/y, respectively. The grain samples in present study having normal levels of radiological hazard due to natural gamma and alpha emitters within global limit. Therefore, it can be concluded that a grain sample does not pose any kind of health hazards or radiological effects to the inhabitant of the study area.
      PubDate: 2022-05-14
       
  • Global Dynamics of a Diffusive Two-Strain Epidemic Model with Non-Monotone
           Incidence Rate

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      Abstract: In this article, we investigate a diffusive two-strain epidemic model with non-monotone incidence rate and virus mutation. The positivity, existence and uniform boundedness of the solutions of the model system are studied. It is found that the system has three equilibrium points, namely the infection-free equilibrium point, the strain-2 endemic equilibrium point and both the strain-1 and strain-2 endemic equilibrium points. The global asymptotic stability analysis of the diffusive model system near all the equilibrium points is carried out by constructing appropriate Lyapunov functional. It is found that the system has no strain-1 endemic equilibrium point possibly due to the virus mutation. So, in this type of diseases, the infection due to strain-1 cannot be persistent in the community.
      PubDate: 2022-05-13
       
  • Bohr Radius for Some Classes of Harmonic Mappings

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      Abstract: In this note, we introduce a general class of sense-preserving harmonic mappings defined as follows: $$\begin{aligned} \mathcal {B}_{\mathcal {H}}^{0}(M):= \{f=h+\bar{g}: \sum _{m=2}^{\infty }(\gamma _m a_m +\delta _m b_m )\le M, \; M>0 \}, \end{aligned}$$ where \(h(z)=z+\sum _{m=2}^{\infty }a_mz^m\) , \(g(z)=\sum _{m=2}^{\infty }b_m z^m\) are analytic functions in \(\mathbb {D}:=\{z\in \mathbb {C}: z \le 1 \}\) and $$\begin{aligned} \gamma _m,\; \delta _m \ge \alpha _2:=\min \{\gamma _2, \delta _2\}>0, \end{aligned}$$ for all \(m\ge 2\) . We obtain Growth Theorem, Covering Theorem, and derive the Bohr radius for the class \(\mathcal {B}_{\mathcal {H}}^{0}(M)\) . As an application of our results, we obtain the Bohr radius for many classes of harmonic univalent functions and some classes of univalent functions.
      PubDate: 2022-05-13
       
  • Evaluation of Natural Radionuclides in Samples of Plant Fertilizers Used
           in Iraq and Radiation Hazard Indicators

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      Abstract: In this study, the specific activity was identified in 12 fertilizer samples using a gamma spectroscopy, and the results showed that the average specific activity of natural radionuclides (226Ra, 232Th, 40 K) was 36.24 ± 0.767 Bq/kg, 55.40 ± 0.973 Bq/kg, and 202.87 ± 5.062 Bq/kg, respectively, where the average specific activity of 226Ra and 232Th exceeded the globally recommended limits, while the average specific activity of 40 K was within the internationally recommended limits by UNSCEAR. The radium equivalent Raeq, absorbed dose rate in air \({D}_{\gamma }\) , annual effective dose equivalent for indoor and outdoor exposure (AEDEindoor and AEDEoutdoor), excess lifetime cancer risk ELCR, internal and external hazard indicators (Hin and Hex) and gamma representative level index were calculated. The results of most samples were within the global average recommended by UNSCEAR, so it is safe to consume and does not pose a threat to the general public.
      PubDate: 2022-05-11
       
  • Point Vortex Dynamics for the 2D Boussinesq Equations Over the Tropics

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      Abstract: The aim of this paper is to find some vortex solutions of finite core size for plane Boussinesq equations in a weighted subspace of \(L^2(\mathbb {R}^2)\) . Here, the solution of the vorticity and temperature equations are separated into \(N\) components and derive separate evolution equations for each component. Next, the solutions are expanded into series of Hermite eigenfunctions. Hence, it is obtained the coefficients of the series and a set of \(2n\) PDEs which govern the evolution of the vorticity of each vortex structure and a set of \(4n\) ODEs governing the motion of the centers of each vortex structure.
      PubDate: 2022-05-10
       
  • Fractional Derivatives with Variable Memory

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      Abstract: Recently, fractional derivatives (FDs) and fractional differential equations are extensively used in modeling of most dynamic processes which generally involve memory factors. Normally, the dynamic models involving full memory effect can be solved with the help of global fractional derivatives, whereas those involves with local memory effect can be solved by using only fractional derivatives with short memory. The prime objective of this work is to define new fractional derivatives of Riemann–Liouville and Caputo types, which can be used for both short and global memory effects. Some general and dynamic properties of the proposed differential operators in comparison to existing formulas of FDs are discussed.
      PubDate: 2022-05-10
       
  • Set-Valued Control to COVID-19 Spread with Treatment and Limitation of
           Vaccination Resources

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      Abstract: In this paper, we consider an SEIR model that describes the dynamics of the COVID-19 pandemic. Subject to this model with vaccination and treatment as controls, we formulate a control problem that aims to reduce the number of infectious individuals to zero. The novelty of this work consists of considering a more realistic control problem by adding mixed constraints to take into account the limited vaccines supply. Furthermore, to solve this problem, we use a set-valued approach combining a Lyapunov function defined in the sense of viability theory with some results from the set-valued analysis. The expressions of the control variables are given via continuous selection of an adequately designed feedback map. The main result of our study shows that even though there are limits of vaccination resources, the combination of treatment and vaccination strategies can significantly reduce the number of exposed and infectious individuals. Some numerical simulations are proposed to show the efficiency of our set-valued approach and to validate our theoretical results.
      PubDate: 2022-05-08
       
  • Activity and Stability of Dextranase from New Penicillium Funiculosum
           TFZ.91: Optimization by Response Surface Methods

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      Abstract: With the aid of experimental design, in this study, we have investigated the activity and stability of dextranase, an important extracellular inducible enzyme that specifically hydrolyzes the α-1,6 glycosidic linkages of dextran, leading to the formation of D-glucose and shorter oligosaccharides. The experimental design results showed the significant individual as well as interaction effects of the tested parameters affecting the dextranase activity and stability. The numerical optimization study suggested that the desired maximum activity and stability of dextranase can be obtained at temperature 40 °C and pH value 6.5. In addition, stability tests showed that dextranase was stable, without compromising its activity, up to 55 °C and in pH range 5–8. Considering the influence of investigated reagents on dextranase activity, the results revealed a pronounced activating effect of glycerol and sucrose, especially with increasing their concentration, with the highest activity detected in the presence of sucrose at 10 mM (129%). Regarding the influence of added metal ions, the higher dextranase activity is recorded in the presence of Ag+, Ca2+, K+, Mg2+, and Si2+ ions, from which the Ca2+ ions were the most effective, and in their presence, at 10 mM the activity of dextranase was 119%.
      PubDate: 2022-05-06
       
  • Nuclear Structure of Samarium Isotopes Using Skyrme and Gogny
           Hartree–Fock–Bogoliubov Method

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      Abstract: The ground-state properties of the Samarium 123−208Sm (Z = 62) Isotopes were investigated in the framework of the Hartree–Fock–Bogoliubov (HFB) method based on different types of the Skyrme and Gogny effective nucleon–nucleon interactions. In this work, we display the calculated results, including the binding energy per particle (B.E/A), quadrupole deformation parameter (β2), potential energy curves, proton quadrupole moment (Qp), neutron pairing gap, double neutron separation energy (S2n) and single-particle levels. Our calculation results have been compared with the experimental measurements, the predictions of Finite-Range-Droplet-Model (FRDM), HFB-Gogny predictions, and Relativistic Mean-Field (RMF) theory. Good agreements were obtained. Our calculated values of B.E/A, β2, Qp and S2n for the investigated isotopes varied approximately: from 6.8 to 8.0 MeV, from − 0.2 to 0.4, from − 4.0 to 8.0 b and from − 3 to 27 MeV, respectively. Present investigations indicate the maximum deformation of the Sm isotopes at 62 < N > 74 and 89 < N > 109 up to β2 ≈ 0.4, where the most pronounced prolate deformation minimum is located between β2 = 0.2 and 0.3.
      PubDate: 2022-05-06
       
  • Nalbuphine Pretreatment Improves Myocardial Cell Viability Induced by H/R
           Through TLR4/NLRP3-Mediated Pyroptosis

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      Abstract: Abstract Myocardial ischemic–reperfusion injury (MIRI) has been the nonnegligible obstacle for the treatment of myocardial infarction that is the dominating cause of morbidity and mortality in cardiovascular diseases around the world. To explore the potential therapeutic drugs and the underlying molecular mechanisms of the MIRI, hypoxia/reoxygenation (H/R) was used to treat H9c2 cardiomyocyte cells to simulate MIRI. The cell viability of H9c2 cardiomyocyte cells was a dose-dependent reduction with nalbuphine, and the maximum non-toxic concentration of nalbuphine was 200 μM. H/R treatment significantly decreased cell viability and increased the rate of pyroptosis and pyroptosis-related proteins levels of H9c2 cardiomyocyte cells, which was prominently reversed with 200 μM nalbuphine pretreatment. Moreover, TLR4 overexpression prominently reduced the cell viability and enhanced the rate of pyroptosis and pyroptosis-related proteins levels of H9c2 cardiomyocyte cells based on the pretreatment of nalbuphine. Therefore, nalbuphine pretreatment improved myocardial cell viability induced by H/R through TLR4/NLRP3-mediated pyroptosis.
      PubDate: 2022-04-27
       
  • A Method for Cancer Genomics Feature Selection Based on LASSO-RFE

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      Abstract: Abstract A more efficient feature selection method was developed to screen genes corresponding to specific cancers to further investigate their pathogenesis. The LASSO-RFE model, a last absolute shrinkage and selection operator (LASSO) classifier based on the idea of recursive feature elimination (RFE), was constructed. To verify the efficiency of the proposed algorithm, performance tests were conducted by using four kinds of gene expression RNA sequences publicly available in The Cancer Genome Atlas (TCGA). The numerical experiments were used to illustrate that the proposed LASSO-RFE enables a higher accuracy of the classification prediction model and a clearer biological interpretability of the selected gene features compared with three typical feature selection algorithms. The experimental results showed that LASSO-RFE effectively reduced tens of thousands of features in the original data to three dimensions and provided better performance for the classification model than mutual information, L1-SVM and tree-based selection method. This model retains the ability of the common LASSO algorithm to filter and remove redundant and irrelevant features, and enhances the biological interpretability according to RFE, which was compared with the traditional feature reduction methods. In this paper, only a limited number of data cases have been validated, and the application of LASSO-RFE with more recent data remains to be further investigated.
      PubDate: 2022-04-20
       
  • An Efficient Alternative Kernel of Gaussian Radial Basis Function for
           Solving Nonlinear Integro-Differential Equations

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      Abstract: Abstract This paper focuses on improving radial basis function (RBF) method for solving nonlinear Volterra–Fredholm integro-differential equations. The RBF method is one of the most important numerical techniques for approximating the solution of problems and interpolating scattered data in any dimensions. Infinitely smooth RBFs such as Gaussians (GA) have the spectral convergence rate. These kernels depend on an auxiliary parameter, called shape parameter that plays a significant role to specify the accuracy of RBF method. When this parameter is close to zero, we achieve the highest accuracy, here the standard RBF interpolant matrix becomes severely ill-conditioned. To overcome this problem, we use a stable alternative base made on the eigenfunction expansion with the help of the properties of the orthogonal Hermite polynomials for GA-RBFs. This idea produces a stable cardinal interpolation function that lacks eigenvalues as the factors of the ill-conditioning of the interpolation matrix. We generalize the upper bound of Volterra integro-differential from x to a function in terms of x with specific conditions. By applying this approach and the Legendre–Gauss–Lobatto quadrature formula, the solution of problem under study is reduced to the solution of a nonlinear system of algebraic equations. We also examine the effect of the number of Legendre–Gauss–Lobatto nodes on the accuracy of the calculations. Furthermore, we find an upper bound for the error function. Several numerical experiments indicate that the present method is more accurate and stable in comparison with the standard GA-RBFs and some other methods.
      PubDate: 2022-04-16
       
  • A Novel Two-Particle Steady-State Wave Equation

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      Abstract: Abstract There is not only the Coulomb force in the orbiting motion between two charged particles, but also a certain magnetic moment coupling interaction. Therefore, according to the macroscopic phenomenon of dipoles, this paper revises the relevant terms of the two-particle stationary Schrödinger equation. The correction in the hydrogen atom and U91+ ion (hydrogen) calculation of hyperfine structure has high calculation precision, such as lamb shift U91+ ions and the theoretical value of quantum electrodynamics basic same. In terms of hyperfine splitting, the developed series is more than the number of quantum electrodynamics and puts forward the concept of the electron orbital tilt angle for the first time. For example, the orbital inclination of hydrogen atom is approximately 0.000069207 radians, and that of U ion is approximately 0.000041427 radians. The results showed that it is because of the existence of this orbital skew that the ground-state electrons will move in a spiral asymptote way, rather than in a closed circular trajectory. This paper also calculates the interaction force between the Sun and Mercury. The calculated result is a third-order tiny quantity more than Newtonian mechanics, which is better than the calculation method of the stationary Schrödinger equation.
      PubDate: 2022-04-16
       
  • Boubaker Matrix Polynomials and Nonlinear Volterra-Fredholm
           Integro-differential Equations

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      Abstract: Abstract In this paper, a new scheme for the formulation of operational matrix form of the integration, differentiation, and approximate functions in any arbitrary interval which will be used in the Galerkin method is presented. There are so many methods to obtain operational matrices for Chebyshev, Legendre, Bernstein, Bessel, etc., polynomials. Our aim is to determine the exact operational matrices for the Boubaker polynomials. This method transforms the nonlinear Volterra-Fredholm integro-differential equations into a system of nonlinear algebraic equations which will be solved easily by the Galerkin procedure. Also, an error estimate and numerical analysis of the proposed method are shown through some theorems. Moreover, the existence and the uniqueness of the solution in this scheme have been proved. To illustrate the efficiency and capability of the method, some examples are presented and their results are compared with the results of some other well-known methods. In addition, an application of this algorithm to the population model is given. The outcome of these examples and their CPU times confirm the capability and validity of this algorithm.
      PubDate: 2022-04-01
       
  • A Numerical Approach for Stochastic Switched Polynomial Optimal Control
           and Approximating Control Lyapunov Functions

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      Abstract: Abstract In this paper, we present an approach based on sum-of-squares (S.O.S) techniques for searching the solution of stochastic switched nonlinear optimal control problems with polynomial data, where the number of switches and the distribution of the switching signal are not pre-assigned. The problem is converted to an embedded polynomial form using a new control variable that is responsible for controlling the switching policy. Using expected occupation measures, the embedded problem is relaxed as a primal infinite-dimensional linear programming problem whose dual leads to a hierarchy of S.O.S problems, through which we approximate both optimal feedback switching signal and continuous input. Furthermore, for a particular case that the subsystems and the cost functions are affine and quadratic in control input, respectively, the approximating polynomials given by solving the S.O.S problems can be considered as polynomial stochastic control Lyapunov functions of the switched systems.
      PubDate: 2022-04-01
       
  • Uniform Convergent Solution of Singularly Perturbed Parabolic Differential
           Equations with General Temporal-Lag

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      Abstract: Abstract In this paper, we presented a parameter uniform B-spline collocation nonstandard finite difference scheme for a class of singularly perturbed parabolic one-dimensional convection–diffusion problems with a time delay on a uniform mesh. When the delay parameter is smaller than the perturbation parameter, the delayed term is expanded in Taylor series and a B-spline collocation tridiagonal nonstandard finite difference scheme is developed. Here, the proposed finite difference scheme is unconditionally stable and is first-order convergent in the temporal direction and second-order accurate in the spatial direction. When the delay parameter is larger than the perturbation parameter, a special type of mesh is used for the temporal variable so that the delay lie on the nodal points and B-spline collocation nonstandard finite difference scheme is developed. The scheme is also unconditionally stable and is first-order convergent in the temporal direction and second-order accurate in the spatial direction. We carried out numerical simulations to verify the theoretical results.
      PubDate: 2022-04-01
       
  • Some Points on c-K-g-Frames and Their Duals

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      Abstract: Abstract In this paper, we study some new properties of c-K-g-frames in a Hilbert space H. We study duals of c-K-g-frames and give some characterizations of c-K-g-frames and their duals. Also, we verify the relationships between c-K-g-frames and atomic cg-systems. Precisely, we show that these two concepts are equivalent. Finally, we find some new atomic cg-systems from given ones.
      PubDate: 2022-04-01
       
  • Comparison of Two Hybrid Functions for Numerical Solution of Nonlinear
           Mixed Partial Integro-Differential Equations

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      Abstract: Abstract In the present paper, two methods have been introduced for solving two-dimensional nonlinear mixed Volterra–Fredholm partial integro-differential equations with initial conditions. Hybrid two-dimensional Taylor polynomials and block pulse functions and operational matrices of integration and derivative have been proposed for numerical approximation. Hybrid two-dimensional Legendre polynomials and block pulse functions have been also utilized for comparison of obtained solutions. These operational matrices have been applied for two methods to reduce the given system of algebraic equations. The error analysis and convergence analysis and some numerical results are provided to describe the efficiency and validity of the schemes through the comparison errors. Several figures are plotted to establish the error analysis of the approaches presented.
      PubDate: 2022-03-23
       
  • Conduction and Resistive Switching in Dropcast CdTe/CdSe Core-Shell
           Quantum Dots Embedded Chitosan Composite

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      Abstract: Abstract We report on conduction and resistive switching in devices consisting of chitosan dispersed with CdTe/CdSe core-shell quantum dots (QDs) active layers sandwiched between silver (Ag) and indium doped tin oxide (ITO) electrodes. Active layers consisting of \(0.96\, \mathrm{wt}\%\) , \(0.48\, \mathrm{wt}\%\) , \(0.32\, \mathrm{wt}\%\) and \(0.24\, \mathrm{wt}\%\) QDs to chitosan were deposited on the ITO surface using the cost-free drop cast method. The electrical study performed on all devices revealed ‘O-type’ memory behaviour with OFF-state current conduction mechanism attributed to hopping mechanism. On the other hand, the ON-state current in each device followed a unique mechanism, such that Ohmic behaviour was observed for the device with \(0.96\, \mathrm{wt}\%\) , while linear then hopping, space-charge limited, and lastly, hopping conductions mechanisms were attributed to devices with \(0.48\, \mathrm{wt}\%\) , \(0.32\, \mathrm{wt}\%\) and \(0.24\, \mathrm{wt}\%\) , respectively. Our results show that these devices’ memory behaviour and conduction can be exploited by controlling the amount of CdTe/CdSe in the chitosan medium.
      PubDate: 2022-03-14
       
 
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