Prikazano Природно-математички факултет za naslov
Prikaz rezultata 163-182 od 269
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On a quarter-symmetric generalized metric connection in a generalized Riemannian manifold
In this talk, we will discuss the generalized Riemannian manifold and introduce a quarter-symmetric connection that preserves the generalized Riemannian metric. We will also observe a quarter-symmetric connection with a ... -
On F-Contractions for Weak α-Admissible Mappings in Metric-Like Spaces
(MDPI (Basel, Switzerland), 2020-09-21)In the paper, we consider some fixed point results of F-contractions for triangular α-admissible and triangular weak α-admissible mappings in metric-like spaces. The results on F-contraction type mappings in the context ... -
On Recent Results Concerning F-Contraction in Generalized Metric Spaces
(MDPI (Basel, Switzerland), 2020-05-11)In this manuscript we discuss, consider, generalize, improve and unify several recent results for so-called F-contraction-type mappings in the framework of complete metric spaces. We also introduce (φ,F) -weak contraction ... -
On some F−contraction of Piri-Kumam-Dung type mappings in metric spaces
(2020-07-15)This paper establishes some new results of Piri–Kumam–Dung-type mappings in a complete metric space.Тhe goal was to improve the already published results. Methods: Using the property of a strictly increasing function as ... -
On Some New Contractive Conditions in Complete Metric Spaces
(MDPI (Basel, Switzerland), 2021-01-07)One of the main goals of this paper is to obtain new contractive conditions using the method of a strictly increasing mapping F:(0,+∞)→(−∞,+∞). According to the recently obtained results, this was possible (Wardowski’s ... -
On Some New Jungck–Fisher–Wardowski Type Fixed Point Results
(MDPI (Basel, Switzerland), 2020-12-10)Many authors used the concept of F−contraction introduced by Wardowski in 2012 in order to define and prove new results on fixed points in complete metric spaces. In some later papers (for example Proinov P.D., J. Fixed ... -
On Some New Results in Graphical Rectangular b-Metric Spaces
(MDPI (Basel, Switzerland), 2020-04-01)In this paper, we provide an approach to establish the Banach contraction principle (for the case λ∈[0,1)) , Edelstein, Reich, and Meir–Keeler type contractions in the context of graphical rectangular b-metric space. The ... -
Optical light beam propagation control trought the defect in one-dimensionalphotonic lattice
(University in Banjaluka, Faculty of Technology, 2022-10-22)Photonic lattices represent are periodic structures, suitable for investigation of wave propagation and localization. Within these systems, different phenomenon such as discrete difraction, lattice solitons, Anderson ... -
Optimization and Validation of Kinetic-Spectrophotometric Technique for the Determination of Pesticide Dicamba in Infant Baby Foods Using Solid Phase Extraction Method
(HARD Publishing Company s.c., 2020-09-08)The objective of this paper was to develop and apply the kinetic-spectrophotometric method for the determination of the pesticide dicamba in infant baby foods available in Serbia. The method is based on the inhibition ... -
Optimization and validation of the kinetic spectrophotometric method for quantitative determination of the pesticide atrazine and its application in infant formulae and cereal-based baby food
(Wiley-VHCA AG, Zurich, Switzerland, 2019-05-11)BACKGROUND: Pesticides are potentially toxic to humans and can produce both acute and chronic health effects, depending on the quantity and the ways in which a person is exposed. Exposure to pesticides can cause serious ... -
Optimization study of the azamethiphos degradation using chlorine dioxide
In the present study, the degradation of azamethiphos using chlorine dioxide was studied. The optimization of the azamethiphos degradation in terms of chloriпe dioxide dosage, different time of degradation and at different ... -
An Overview of Novel Methods for ASEP Performance Evaluation Based on Q-Function Approximation
(27th Telecommunications forum TELFOR 2019, 2019-11-27)The closed-form expression for Q-function does not exist so it is necessary to develop its approximation in order to overcome the difficulties that might appear in diverse research areas. In this paper the authors are ... -
Overview of the major classes of new psychoactive substances, psychoactive effects, analytical determination and conformational analysis of selected illegal drugs
The misuse of psychoactive substances is attracting a great deal of attention from the general public. An increase use of psychoactive substances is observed among young people who do not have enough awareness of the ... -
Phenolic and flavonoid content and antioxidant evaluation of hawthorn (Crataegus Monogyna Jacq.) fruits and leaves extracts
Considering the facts that phenolic compounds have many pharmacological effects, as well that antioxidant effect of phenolic compounds has been proven in various experimental systems, aim of this research was to determine ... -
PHYSICAL-CHEMICAL CHARACTERIZATION OF PHOSPHATETUNGSTEN BRONZE DOPED WITH IRON FROM HETEROPOLY SALTS AS PRECURSORS
Heteropolyacids, with a general formula ofH3+xAM12O40∙nH2O (x=0-1; A=P, Si, B, As, Ge;M=Mo, W; n=30-6) are of special interest as newmaterials because of their high conductivities. Among them special attention deserves ... -
PHYSICOCHEMICAL INVESTIGATION Zn DOPED PWB
Polyoxometalates (POMs), although having more than a hundred years of history, continue to attract the attention of researchers as catalysts, solid superionic proton conductors at room temperatures, applicable in different ... -
Phytochemical and antioxidant screening of some extracts of Juniperus communis L. and Juniperus oxycedrus L.
(2019-10-25)The content of phytochemicals, total phenolics, total flavonoids and antioxidant potential of extracts of Juniperus communis L. and Juniperus oxycedrus L. berries were determined. Ethanol, ethyl acetate and chloroform were ... -
Plant uptake and soil retention of radionuclides and metals in vineyard environments
In most European countries, each adult citizen drinks on averagemore than 20 L of wine every year. Three popular wine-growing areas (Aleksandrovac, Topola, and Orahovac) in Serbia were studied in order to investigate the ... -
Poly(dimethylsiloxane) modified polymers: Synthesis, structure and physical properties
Poly(dimethylsiloxane)s (PDMS) have one of the lowest values of glass transition temperature among synthetic polymers, and indicate low-temperature flexibility, excellent thermal, thermo-oxidative and ultraviolet stability, ... -
Power Flow in Graded-Index Plastic Optical Fibers
(IEEE, 2019-07-03)A method is proposed for predicting the evolution of the power distribution along graded-index plastic optical fibers. This method is verified against our recently reported measurements. The strong influence of mode coupling ...