Ara
Toplam kayıt 30, listelenen: 21-30
Impact of heating season on the soil pollution in Kirklareli province of Turkey
(Springer, 2021)
This study, conducted in Kirklareli city centre, aims to analyse heavy metal pollution in soil due to heating season (HS). For this purpose, 86 soil samples were taken from the identified locations with a depth of 0-10 cm ...
The effect of collector parameters on nanofiber yarns produced by electro yarn spinning machine with conical collector
(Taylor & Francis Ltd, 2021)
In this work, electrospun yarns were produced by a nanofiber yarn spinning machine with a conical collector. In the first part, two different polymers (PAN and PVDF-HFP) were used in nanofiber yarn spinning with two different ...
Investigation of tribological behavior of 20NiCrBSi-WC12Co coated brake disc by HVOF method
(Iop Publishing Ltd, 2020)
In braking systems, which consist of dry sliding lining against a pearlitic cast-iron disc, disc wear has a significant impact on the overall wear rate. In this work, dynamometer tests were conducted to find out the friction ...
QUALITATIVE BEHAVIOURS OF A SYSTEM OF NONLINEAR DIFFERENCE EQUATIONS
(Editura Bibliotheca-Bibliotheca Publ House, 2021)
The paper aims to study the dynamics of a system of nonlinear difference equations x(n+1) = x(n-1)y(n) + A, y(n+1) = y(n-1)x(n) + A where is real number. We especially investigate the stability of equilibrium points, ...
Global dynamics of a higher order difference equation with a quadratic term
(Springer Heidelberg, 2021)
In this paper, we investigate the dynamics of the following higher order difference equation x(n+1) = A + B x(n)/x(n-m)(2) with A, B and initial conditions are positive numbers, and m is an element of {2, 3, ...}. Especially ...
On bicomplex generalized Tetranacci quaternions
(Bulgarian Acad Science, 2020)
In this paper, we introduce the bicomplex generalized Tetranacci quaternions. Furthermore, we present some properties of these quaternions and derive relationships between them.
The effects of STEM activities on the problem-solving skills of 6-year-old preschool children
(Routledge Journals, Taylor & Francis Ltd, 2021)
In this study, the effects of STEM activities on the problem-solving skills of preschool children were investigated. A two-group (study: n = 18 and control: n = 18) pre-test/post-test/retention test experimental design was ...
Dynamics of a Second-order System of Nonlinear Difference Equations
(Semnan Univ, 2020)
In this paper, we investigate the equilibrium points, stability of two equilibrium points, convergences of negative equilibrium point, periodic solutions, and existence of bounded or unbounded solutions of a system of ...
Analysis of polyacrylonitrile nanofiber yarn formation in electrospinning by using a conical collector and two oppositely charged nozzles
(Taylor & Francis Ltd, 2021)
Nanofiber production by electrospinning has become a common production method as it is an easy and flexible system producing nanofibrous webs. However, direct spinning of nanofibers into a yarn would lead to conversion of ...
Artificial neural network-based 4-d hyper-chaotic system on field programmable
(Ismail Saritas, 2020)
In this presented study, a 4-D hyper-chaotic system newly proposed to the literature, has been implemented as Multi-Layer Feed-Forward Artificial Neural Network-based on FPGA chip with 32-bit IEEE-754-1985 floating-point ...