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Academic Articles & Research Papers
Showing 20 of 121 academic articles
Daria Mangileva, Pavel Konovalov, Arsenii Dokuchaev, Olga Solovyova et al. • Mathematics
(2021)
Rotating nonlinear waves of excitation in the heart cause dangerous cardiac arrhythmias. Frequently, ventricular arrhythmias occur as a result of myocardial infarction and are associated with rotation of the waves around a post-infarction s...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/math9222911
Gabriel Frahm • Risks
(2018)
An intersection–union test for supporting the hypothesis that a given investment strategy is optimal among a set of alternatives is presented. It compares the Sharpe ratio of the benchmark with that of each other strategy. The interse...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/risks6020040
Serigne Abdoul Aziz Dramé, Cheikh Khoule, Hamidou Dathe • Journal of Mathematics
(2026)
In this paper, we define a generalized Reeb distribution of an Engel 4n-manifold and give a necessary and sufficient condition for integrability of this Reeb distribution which gives a generalization of some results of N. Pia about Reeb dis...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/jom/5697719
H. M. Rezk, Wedad Albalawi, H. A. Abd El-Hamid, Ahmed I. Saied et al. • Journal of Function Spaces
(2022)
In this article, some fractional Hardy-Leindler-type inequalities will be illustrated by utilizing the chain law, Hölder’s inequality, and integration by parts on fractional time scales. As a result of this, some classical integral inequali...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/2022/2399182
Ruyi Liu, Zhen Wu • Advances in Difference Equations
(2018)
Abstract This paper introduces the regular decoupling field to study the existence and uniqueness of solutions of two-point boundary value problems for a class of ordinary differential equations which can be derived from the maximum princip...
DOAJ
Open Access (DOAJ)
DOI: 10.1186/s13662-018-1510-5
Risky Kurniawati, Raekha Azka • Hipotenusa
(2022)
This study aims to develop a valid mathematics e-comic learning media for class VIII students on statistical material. The design of the e-comic mathematics learning media development using the PPE stage includes planning (planning), produc...
DOAJ
Open Access (DOAJ)
DOI: 10.18326/hipotenusa.v4i2.7501
Jun Wang, Huopo Pan, Fajiang Liu • Journal of Applied Mathematics
(2012)
The interacting impact between the crude oil prices and the stock market indices
in China is investigated in the present paper, and the corresponding statistical
behaviors are also analyzed. The database is based on the crude oil prices of ...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/2012/646475
Li Huang, Lijie Mei, Shixiang Huang • European Physical Journal C: Particles and Fields
(2018)
Abstract In this study, we present a novel non-truncated strategy by accompanying the fixed-point iteration with traditional numerical integrators. The proposed non-truncated strategy aims to exactly integrate implicit motion equations that...
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Open Access (DOAJ)
DOI: 10.1140/epjc/s10052-018-6291-1
Aleš Kopal, Eva Mejzlíková, Jana Lízrová Preiningerová, David Brebera et al. • Parkinson's Disease
(2015)
Parkinson’s disease (PD) is characterized by motor and nonmotor symptoms. Nonmotor symptoms include primarily visual hallucinations (VH). The aim of our study was to establish whether patients with PD and visual hallucinations (PDH+) have s...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/2015/709191
David A. Clark, David A. Clark, Seth R. Odell, Seth R. Odell et al. • Frontiers in Behavioral Neuroscience
(2018)
An animal’s ability to navigate an olfactory environment is critically dependent on the activities of its first-order olfactory receptor neurons (ORNs). While considerable research has focused on ORN responses to odorants, the mechanisms by...
DOAJ
Open Access (DOAJ)
DOI: 10.3389/fnbeh.2018.00324
Nicholas E. Protonotarios, George A. Kastis, Andreas D. Fotopoulos, Andreas G. Tzakos et al. • Mathematics
(2022)
The effective resolution of positron emission tomography (PET) can be significantly degraded by patient motion during data acquisition. This is especially true in the thorax due to respiratory motion. This study concentrates on the improvem...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/math11010055
Matan Avitan, Elena V. Ravve, Zeev Volkovich • Mathematics
(2024)
Many different aspects of software system development and verification rely on precise function identification in binary code. Recognition of the source Assembly functions in embedded systems is one of the fundamental challenges in binary p...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/math12050658
Hacer Efe, Ünsal Umdu Topsakal • South African Journal of Education
(2022)
In the study reported on here, the effects of science centres on the perceptions of secondary school students towards the nature of science were examined. The study group consisted of 16 students aged 13 and 14 of which 7 were female and 9 ...
DOAJ
Open Access (DOAJ)
DOI: 10.15700/saje.v42n2a2017
Zaid Ameen Abduljabbar, Vincent Omollo Nyangaresi, Ahmed Ali Ahmed, Junchao Ma et al. • Scientific Reports
(2025)
Abstract Vehicular Ad-Hoc Networks (VANETs) have facilitated the massive exchange of real-time traffic and weather conditions, which have helped prevent collisions, reduce accidents, and road congestions. This can effectively enhance drivin...
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Open Access (DOAJ)
DOI: 10.1038/s41598-025-15011-x
Combettes Patrick L., Glaudin Lilian E. • Advances in Nonlinear Analysis
(2021)
Various strategies are available to construct iteratively a common fixed point of nonexpansive operators by activating only a block of operators at each iteration. In the more challenging class of composite fixed point problems involving op...
DOAJ
Open Access (DOAJ)
DOI: 10.1515/anona-2020-0173
Mansur Ziiatdinov, Fedor Levkovich-Maslyuk, Emmanuel M. Pothos • Entropy
(2026)
Finding the global minimum of a function with many local extrema is well known to be a challenging computational task. We propose a hybrid quantum–classical algorithm for this optimisation problem, based on a combination of Grover quantum s...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e28101060
Karol Horodecki, Jingfang Zhou, Maciej Stankiewicz, Roberto Salazar et al. • New Journal of Physics
(2023)
Quantum contextuality is one of the most recognized resources in quantum communication and computing scenarios. We provide a new quantifier of this resource, the rank of contextuality (RC). We define RC as the minimum number of non-contextu...
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Open Access (DOAJ)
DOI: 10.1088/1367-2630/acdf78
Komarudin Komarudin, Suherman Suherman, Laila Puspita • Prima: Jurnal Pendidikan Matematika
(2024)
This study aims to assess the feasibility, teacher and student responses, and effectiveness of the STEM-based digital pocketbook on the topic of Systems of Linear Equations in Two Variables (SPLDV). The subjects of this research were junior...
DOAJ
Open Access (DOAJ)
DOI: 10.31000/prima.v8i2.9345
Wenbo Liu, Qiong Huang, Xinjian Chen, Hongbo Li • Cybersecurity
(2021)
Abstract Functional encryption (FE) is a novel paradigm for encryption scheme which allows tremendous flexibility in accessing encrypted information. In FE, a user can learn specific function of encrypted messages by restricted functional k...
DOAJ
Open Access (DOAJ)
DOI: 10.1186/s42400-020-00067-1
Jantima Polpinij, Manasawee Kaenampornpan, Christopher S. G. Khoo, Wei-Ning Cheng et al. • Mathematics
(2026)
Extracting and organizing knowledge from the agricultural crop disease research literature are challenging tasks because of the heterogeneous terminologies, complicated symptom descriptions, and unstructured nature of scientific documents. ...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/math14020299