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New Insights into Cd<sup>2+</sup>/Fe<sup>3+</sup> Co-Doped BiOBr for Enhancing the Photocatalysis Efficiency of Dye Decomposition under Visible-Light

Hong Sheng, Wei Wang, Rong Dai, Jing Ning et al. • Nanomaterials (2021)

Uniform flowerlike microspheres Cd2+/Fe3+ co-doped BiOBr were prepared with the aid of the microwave hydrothermal process. The results indicate that the degradation performance of Bi1−xCdxOBr and Bi1−xFexOBr are 1.31 and 2.05 times that of ...

DOAJ Open Access (DOAJ) DOI: 10.3390/nano11020423

Changing Movements in a Changing World: Modelling Early Pleistocene and Early Middle Pleistocene Climatic and Ecological Environments and Influences on Hominin Dispersal in Eurasia

Kamilla L. Lomborg, Carolina Cucart-Mora, Jan-Olaf Reschke, Christine Hertler et al. • Journal of Computer Applications in Archaeology (2026)

In a world of drastic climatic and ecological changes, our knowledge of how the environment influenced hominin behaviour is of the utmost importance. Archaeology plays a key role in this domain, as it is the only discipline that studies emp...

DOAJ Open Access (DOAJ) DOI: 10.5334/jcaa.212

Mathematics and Plausible Reasoning

George Pólya • CERN Document Server (European Organization for Nuclear Research) (1954)

This is a guide to the practical art of plausible reasoning, this book has relevance in every field of intellectual activity. Professor Polya, a world-famous mathematician from Stanford University, uses mathematics to show how hunches and g...

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AMPLITUDE-TIME ANALYSIS OF BIOMECHANICAL PATTERNS OF HUMAN MOTIONS

DAVYDOVA, Nadezhda, LUKASHEVICH, Dmitry, BYKOV, Dmitry, VASIUK, Valery et al. • Journal of Engineering Science (Chişinău) (2020)

Biomechanical analysis of motions solves the tasks of efficiency estimation of movement realization, search of technique optimal variants and tactics of motion performance, definition of a degree and reasons of not matching real movement ac...

DOAJ Open Access (DOAJ) DOI: 10.5281/zenodo.3949690

Optimasi proses penjadwalan mata kuliah menggunakan algoritme genetika dan pencarian tabu

Arif Amrulloh, Enny Itje Sela • Jurnal Teknologi dan Sistem Komputer (2021)

Penjadwalan mata kuliah merupakan permasalahan yang sering terjadi pada perguruan tinggi, di antaranya adalah bentrok waktu mengajar dosen, ruangan dan kelas mahasiswa. Kajian ini mengusulkan optimasi penjadwalan mata kuliah menggunakan alg...

DOAJ Open Access (DOAJ) DOI: 10.14710/jtsiskom.2021.14137

Cooperation-Based Modeling of Sustainable Development: An Approach from Filippov’s Systems

Jorge A. Amador, Johan Manuel Redondo, Gerard Olivar‐Tost, Christian Erazo • Complexity (2021)

The concept of Sustainable Development has given rise to multiple interpretations. In this article, it is proposed that Sustainable Development should be interpreted as the capacity of territory, community, or landscape to conserve the noti...

DOAJ Open Access (DOAJ) DOI: 10.1155/2021/4249106

DAF-UNet: Deformable U-Net with Atrous-Convolution Feature Pyramid for Retinal Vessel Segmentation

Yongchao Duan, Rui Yang, Ming Zhao, Mingrui Qi et al. • Mathematics (2025)

Segmentation of retinal vessels from fundus images is critical for diagnosing diseases such as diabetes and hypertension. However, the inherent challenges posed by the complex geometries of vessels and the highly imbalanced distribution of ...

DOAJ Open Access (DOAJ) DOI: 10.3390/math13091454

All Near Neighbor GraphWithout Searching

Edgar Chávez, Verónica Ludueña, Nora Reyes, Fernando Kasián • Journal of Computer Science and Technology (2018)

Given a collection of n objects equipped with a distance function d(·, ·), the Nearest Neighbor Graph (NNG) consists in finding the nearest neighbor of each object in the collection. Without an index the total cost of NNG is quadratic. Usin...

DOAJ Open Access (DOAJ) DOI: 10.24215/16666038.18.e07

System 2 Thinking in OpenAI’s o1-Preview Model: Near-Perfect Performance on a Mathematics Exam

Joost C. F. de Winter, Dimitra Dodou, Yke Bauke Eisma • Computers (2024)

The processes underlying human cognition are often divided into System 1, which involves fast, intuitive thinking, and System 2, which involves slow, deliberate reasoning. Previously, large language models were criticized for lacking the de...

DOAJ Open Access (DOAJ) DOI: 10.3390/computers13110278

Graded weakly 1-absorbing prime ideals

Ünsal Tekir, Suat Koç, Rashid Abu-Dawwas, Eda Yıldız • Cubo (2022)

In this paper, we introduce and study graded weakly 1-absorbing prime ideals in graded commutative rings. Let $G$ be a group and $R$ be a $G$-graded commutative ring with a nonzero identity $1\neq0$. A proper graded ideal $P$ of $R$ is call...

DOAJ Open Access (DOAJ) DOI: 10.56754/0719-0646.2402.0291

The Handbook of Mathematical Cognition

Jamie I. D. Campbell • Psychology Press eBooks (2005)

Part 1: Cognitive Representations for Number and Mathematics. M. Fayol, X. Seron, About Numerical Representations: Insights from Neuropsychological, Experimental and Developmental Studies. M. Brysbaert, Number Recognition in Different Forma...

OPENALEX DOI: https://doi.org/10.4324/9780203998045

Cloud point extraction procedure for preconcentration and determination of lead(II) ions using triton X-100 at room temperature

Suljkanović Mersiha, Suljagić Jasmin, Hasić Nusreta, Hodžić Selmina • Acta Periodica Technologica (2019)

A Cloud point extraction (CPE) procedure was presented for preconcentration of lead(II) ions, after complexation by 18-crown-6 (18C6) and extraction with Triton X-100 at proposed experimental conditions. After separation of surfact...

DOAJ Open Access (DOAJ) DOI: 10.2298/APT1950286S

Global quantum correlations in finite-size spin chains

S Campbell, L Mazzola, G De Chiara, T J G Apollaro et al. • New Journal of Physics (2013)

We perform an extensive study of the properties of global quantum correlations in finite-size one-dimensional quantum spin models at finite temperature. By adopting a recently proposed measure for global quantum correlations (Rulli and Sara...

DOAJ Open Access (DOAJ) DOI: 10.1088/1367-2630/15/4/043033

The Philosophy of Mathematics

Jager, Ronald • Routledge eBooks (2014)

Russell's logical investigations in the foundations of mathematics produced a fund of novel ideas, techniques, and possibilities. His powers of conception and exposition have made the subject an engaging area of study for generations of stu...

OPENALEX DOI: https://doi.org/10.4324/9781315830582-12