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Academic Articles & Research Papers
Showing 20 of 4,465 academic articles
Saritha Kodikara, Kim-Anh Lê Cao • Microbiome
(2025)
Abstract Background The microbiome is a complex ecosystem of interdependent taxa that has traditionally been studied through cross-sectional studies. However, longitudinal microbiome studies are becoming increasingly popular. These studies ...
DOAJ
Open Access (DOAJ)
DOI: 10.1186/s40168-025-02041-w
Haihua Yu, Zhiyi Zhuo, Jing Zhang • SAGE Open
(2023)
Based on the Internet Finance development index developed by Peking University in investigating 31 provinces, we use social network analysis to investigate the spatial correlation and influencing factors of the Internet Finance of China’s p...
DOAJ
Open Access (DOAJ)
DOI: 10.1177/21582440231193340
Bas van Geffen, Bart Jansen, Arnoud de Kroon, Rolf Morel • Journal of Graph Algorithms and Applications
(2020)
Many combinatorial problems can be solved in time $\mathcal{O}^*(c^{\mathrm{tw}})$ on graphs of treewidth $\mathrm{tw}$, for a problem-specific constant $c$. In several cases, matching upper and lower bounds on $c$ are known based on the St...
DOAJ
Open Access (DOAJ)
DOI: 10.7155/jgaa.00542
Yudong Li, Tianyu Zhang, Yujun Zhang • Journal of Applied Mathematics
(2014)
This paper deals with the control problem of the chaotic system subject to disturbance. The sliding mode surface is designed by singular system approach, and sufficient condition for convergence is given. Then, the adaptive sliding mode con...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/2014/580105
Zellig Sabbettai Harris (1968)
This book attempts to show how one can arrive at an abstract system which characterizes precisely natural language. This is done by taking the data of language and finding within the data such relations as can be organized into a suitable m...
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Paul Dowling (1998)
Until the 1960s, maths was studied as an academic subject in a desire to have more mathematicians. The current trend, however, has moved away from viewing maths as a purely intellectual endeavour and towards developing a more mathematically...
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Darman Agung Sandakila, Gracetia Devita Hadi, Riska Gultom, Seni Samalele et al. • Aceh Journal of Animal Science
(2024)
The Black Soldier Fly (Hermetia illucens L.) or BSF is one of a group of insects that has a length of 15-20 mm originating from America. The larvae of the BSF has a high protein content (44.26%), which has great potential in treating wound ...
DOAJ
Open Access (DOAJ)
DOI: 10.13170/ajas.9.3.42024
Fran Sérgio Lobato • Trends in Computational and Applied Mathematics
(2011)
A otimização dinâmica do processo de fermentação batelada alimentada, através do controle da vazão de alimentação de substrato, caracteriza um problema de controle singular de difícil solução devido à flutuação do índice diferencial e da...
DOAJ
Open Access (DOAJ)
DOI: 10.5540/tema.2011.012.01.0001
Juozas Juvencijus Mačys • Lietuvos Matematikos Rinkinys
(2008)
It is shown here how to interpret Stirling’s formula geometrically, moreover, how geometrical reasoning
can serve determining the proper magnitude of the logarithm of the factorial....
DOAJ
Open Access (DOAJ)
DOI: 10.15388/LMR.2008.19
Jens G. Balchen, Bernt Lie, Ingar Solberg • Modeling, Identification and Control
(1988)
A simple method has been investigated for the total or partial removal of the effect of non-linear process phenomena in multi-variable feedback control systems. The method is based upon computing the control variables which will drive the p...
DOAJ
Open Access (DOAJ)
DOI: 10.4173/mic.1988.3.3
Simone Balmelli, Francesco Moresino • Mathematics
(2023)
We address the problem of charging plug-in electric vehicles (PEVs) in a decentralized way and under stochastic dynamics affecting the real-time electricity tariff. The model is formulated as a Nash equilibrium seeking problem, where player...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/math11040999
E. Lowen, R. Lowen • International Journal of Mathematics and Mathematical Sciences
(1988)
We show that convergence spaces with continuous maps and metric spaces with
contractions, can be viewed as entities of the same kind. Both can be characterized by a limit function λ which with each filter ℱ associates a map λℱ from the un...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/S016117128800050X
Rhomiy Handican, Wahyu Setyaningrum • Edumatika
(2021)
The widespread use of smartphones to play games and the lack of use as a medium for learning mathematics is the reason for the need for the development of smartphone-based edutainment learning media. The purpose of this research is to desig...
DOAJ
Open Access (DOAJ)
DOI: 10.32939/ejrpm.v4i1.607
Matius Tadi, Besse Arnawisuda Ningsi • Jurnal Lebesgue
(2023)
Poverty is a special problem that needs to be discussed in Indonesia. Because poverty that occurs in a certain area will have an impact on development in Indonesia. Banten province has a percentage of 6.04 percent with a total poverty of 57...
DOAJ
Open Access (DOAJ)
DOI: 10.46306/lb.v4i1.224
Ward Cheney, David R. Kincaid (1980)
Authors Ward Cheney and David Kincaid show students of science and engineering the potential computers have for solving numerical problems and give them ample opportunities to hone their skills in programming and problem solving. The text a...
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Tommy Dreyfus • Cambridge University Press eBooks
(1990)
This chapter presents the principal currents and results in recent cognitive research on advanced mathematical thinking processes. The ambiguity in the phrase advanced mathematical thinking processes is intentional: The word advanced can an...
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DOI: https://doi.org/10.1017/cbo9781139013499.008
Maria Chiara Passolunghi, Sara Caviola, Ruggero De Agostini, Chiara Perin et al. • Frontiers in Psychology
(2016)
Mathematics anxiety (MA) has been defined as "a feeling of tension and anxiety that interferes with the manipulation of numbers and the solving of math problems in a wide variety of ordinary life and academic situations." Previous studies h...
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DOI: https://doi.org/10.3389/fpsyg.2016.00042
PMC: 4735424
Shewafera Wondimagegnhu Teklu, M. A. Abdelkawy, Waleed Adel • Complexity
(2026)
Misinformation spreads through communities in ways that resemble infectious diseases, but existing mathematical models often miss three real-world complexities: People remember past information (memory effects), some folks are more easily f...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/cplx/8861194
Subhas Khajanchi, Kankan Sarkar, Jayanta Mondal, Kottakkaran Sooppy Nisar et al. • Results in Physics
(2021)
Mathematical modeling plays an important role to better understand the disease dynamics and designing strategies to manage quickly spreading infectious diseases in lack of an effective vaccine or specific antivirals. During this period, for...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.rinp.2021.104285
Frank Pajares, M. David Miller • Journal of Counseling Psychology
(1995)
In this study, 391 students were asked to provide 3 types of mathematics self-efficacy judgments: confidence to solve mathematics problems, confidence to succeed in math-related courses, and confidence to perform math-related tasks. Criteri...
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DOI: https://doi.org/10.1037//0022-0167.42.2.190