Results 1 to 10 of about 33,314 (167)

An Inter-Disciplinary Language for Inter-Disciplinary Communication: Academic Globalization, Ethos, Pathos, and Logos [PDF]

open access: yesJournal of Systemics, Cybernetics and Informatics, 2014
Inspired by the intersection of character, emotions, and logic, much like a Hungarian Rhapsody which is beautifully sad; this paper explores ethos, pathos, and logos in the context of Academic Globalization.
Marta Szabo White
doaj   +1 more source

The Power of Fertility and Its Importance for the Concept of Sustainable Development

open access: yesStudia Ecologiae et Bioethicae, 2021
Demographic changes are one of the indicators of sustainable development, expressed by the value of the natural increase in the human population, resulting directly from the fertility level, which is the subject of this article.
Zuzanna Jakubowska   +5 more
doaj   +1 more source

Modeling and Investigation of the Effect of a Wind Turbine on the Atmospheric Boundary Layer

open access: yesEnergies, 2022
Wind power engineering is one of the environmentally safe areas of energy and certainly makes a significant contribution to the fight against CO2 emissions.
Vladislav N. Kovalnogov   +4 more
doaj   +1 more source

Eighth Order Two-Step Methods Trained to Perform Better on Keplerian-Type Orbits

open access: yesMathematics, 2021
The family of Numerov-type methods that effectively uses seven stages per step is considered. All the coefficients of the methods belonging to this family can be expressed analytically with respect to four free parameters.
Vladislav N. Kovalnogov   +4 more
doaj   +1 more source

Applying the Random Forest Method to Improve Burner Efficiency

open access: yesMathematics, 2022
Fuel power plants are one of the main sources of pollutant emissions, so special attention should be paid to improving the efficiency of the fuel combustion process.
Vladislav Kovalnogov   +5 more
doaj   +1 more source

On a New Family of Runge–Kutta–Nyström Pairs of Orders 6(4)

open access: yesMathematics, 2022
In this study, Runge–Kutta–Nyström pairs of orders 6(4) using six stages per step are considered. The main contribution of the present work is that we introduce a new family of pairs (i.e., new methodology of solution for order conditions) that possesses
Vladislav N. Kovalnogov   +5 more
doaj   +1 more source

Runge–Kutta–Nyström Pairs of Orders 8(6) for Use in Quadruple Precision Computations

open access: yesMathematics, 2023
The second-order system of non-stiff Initial Value Problems (IVP) is considered and, in particular, the case where the first derivatives are absent.
Vladislav N. Kovalnogov   +5 more
doaj   +1 more source

A Neural Network Technique for the Derivation of Runge–Kutta Pairs Adjusted for Scalar Autonomous Problems

open access: yesMathematics, 2021
We consider the scalar autonomous initial value problem as solved by an explicit Runge–Kutta pair of orders 6 and 5. We focus on an efficient family of such pairs, which were studied extensively in previous decades.
Vladislav N. Kovalnogov   +4 more
doaj   +1 more source

Runge–Kutta Embedded Methods of Orders 8(7) for Use in Quadruple Precision Computations

open access: yesMathematics, 2022
High algebraic order Runge–Kutta embedded methods are commonly used when stringent tolerances are demanded. Traditionally, various criteria are satisfied while constructing these methods for application in double precision arithmetic.
Vladislav N. Kovalnogov   +4 more
doaj   +1 more source

Evolutionary Derivation of Runge–Kutta Pairs of Orders 5(4) Specially Tuned for Problems with Periodic Solutions

open access: yesMathematics, 2021
The purpose of the present work is to construct a new Runge–Kutta pair of orders five and four to outperform the state-of-the-art in these kind of methods when addressing problems with periodic solutions.
Vladislav N. Kovalnogov   +4 more
doaj   +1 more source

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