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Impact of using virtual and concrete manipulatives on students’ learning of fractions

Nabil Kamal Al Farra, Shashidhar Belbase, Hassan Tairab, Ahmad Qablan et al. • Cogent Education (2024)

Fraction is considered one of the main topics in mathematics in the early years. Many students struggle to progress in fractions in the classrooms and on exams. Teaching strategies are among the most important factors affecting student lear...

DOAJ Open Access (DOAJ) DOI: 10.1080/2331186X.2024.2379712

Image encryption and distribution method based on LFSR and counters

V. Luzhetsky, M. Tsikhotskyi • Ìнформаційні технології та компʼютерна інженерія (2025)

In the conditions of processing large amounts of graphic data, the task arises of developing a reliable image encryption scheme with reduced computing costs. The purpose of the study was to develop a deterministic scheme for encrypting and ...

DOAJ Open Access (DOAJ) DOI: 10.31649/vitce/3.2025.77

TOURISM SUSTAINABILITY ANALYSIS AND THE PROSPECTS FOR CREATING AN ETHNOVISUAL TOURISM ATLAS IN ADJARA

Manuchar Loria, Gulad khilaishvili, Natalia Jijavadze • Three Seas Economic Journal (2023)

Ethnovisual tourism explores a destination's cultural heritage through visual means, generating economic benefits and encouraging investment in cultural infrastructure and heritage conservation projects. Assessing the social, economic and e...

DOAJ Open Access (DOAJ) DOI: 10.30525/2661-5150/2023-3-1

Diagnosis of winter precipitation types using the spectral bin model (version 1DSBM-19M): comparison of five methods using ICE-POP 2018 field experiment data

W. Bang, J. T. Carlin, K. Kim, A. V. Ryzhkov et al. • Geoscientific Model Development (2025)

Winter precipitation types (WPTs) are controlled by many factors, including thermodynamic and microphysical processes. Therefore, realistically simulating interactions between precipitation particles and the atmosphere is important when dia...

DOAJ Open Access (DOAJ) DOI: 10.5194/gmd-18-3559-2025

Comparative Study of CUDA GPU Implementations in Python With the Fast Iterative Shrinkage-Thresholding Algorithm for LASSO

Younsang Cho, Jaeoh Kim, Donghyeon Yu • IEEE Access (2022)

A general-purpose GPU (GPGPU) is employed in a variety of domains, including accelerating the spread of deep natural network models; however, further research into its effective implementation is needed. When using the compute unified devic...

DOAJ Open Access (DOAJ) DOI: 10.1109/ACCESS.2022.3175987

Investigating the cost of mechanized unpaved road maintenance operations in Uganda

Andrew Moses Obeti, Lawrence Muhwezi, John Muhumuza Kakitahi, Chris Bic Byaruhanga • Transportation Research Interdisciplinary Perspectives (2024)

Force Account Mechanism (FAM) is the predominant road maintenance system in Uganda’s local government setup and a similar, though slightly different approach, is used in some large private sector agriculture plantations. With the Uganda Roa...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.trip.2024.101135

Experimental and Modelling Research on the Effect of Prior Ferrite on Bainitic Transformation in Medium-Carbon Bainitic Steel

Xinpan Yu, Wei Liu, Kang He, Tengfei Wang et al. • Crystals (2024)

In this study, we investigate the impact of prior ferrite on the bainite transformation kinetics and microstructure of medium-carbon steel interrupted by an intercritical annealing (IAA) process. It was found that the incubation time and co...

DOAJ Open Access (DOAJ) DOI: 10.3390/cryst14060487

Earnings management and performance of acquiring companies in mergers and acquisitions in Brazil

Elizio Marcos dos Reis, Wagner Moura Lamounier • Revista Contabilidade & Finanças (2026)

ABSTRACT This article investigated whether the economic and market performance of Brazilian companies after mergers and acquisitions (M&As) was influenced by earnings management (EM) practices adopted before these operations. Domestic empir...

DOAJ Open Access (DOAJ) DOI: 10.1590/1808-057x20262462.en

Seasonal particle responses to near‐bed shear stress in a shallow, wave‐ and current‐driven environment

Grace Chang, Galen Egan, Joseph D. McNeil, Samuel McWilliams et al. • Limnology and Oceanography Letters (2022)

Abstract Novel analysis of in situ acoustic and optical data collected in a shallow, wave‐ and current‐driven environment enabled determination of (1) particle characteristics that were most affected by near‐bed physical forcing over season...

DOAJ Open Access (DOAJ) DOI: 10.1002/lol2.10221

Diferenciação geográfica de Macrodon ancylodon (Bloch & Schneider, 1801) na costa brasileira, entre as latitudes 18º36'S e 32º10'S: etapa I The geographical differentiation of Macrodon ancylodon (Bloch & Schneider, 1801) in the Brazilian coast between Lat. 18º36'S and 32º10'S: phase I

Noriyoshi Yamaguti • Brazilian Journal of Oceanography (1979)

Multiple range tests according to Kramer, 1956 were performed on 3 meristic and 15 morphometric characters of "pescada-foguete" (Macrodon ancylodon) samples collected off coast near Conceição da Barra (Espirito Santo State), Atafona, Macaé,...

DOAJ Open Access (DOAJ) DOI: 10.1590/S1679-87591979000100002

Determination of Optimal Principal Ship Dimensions Considering EEDI and Operational Efficiency

Bo-Sung Jung, Seung-Ho Ham • Journal of Marine Science and Engineering (2026)

The determination of principal dimensions in the early ship design stage requires iterative calculations based on the basis ship particulars and ship owner’s requirements, demanding considerable time and engineering effort. In modern shipbu...

DOAJ Open Access (DOAJ) DOI: 10.3390/jmse14100939

Analysis of Multi Temporal Satellite Imagery for Total Suspended Sediments in a Wave-Active Coastal Area-Gaza Strip Coastal Water, Palestine

Midyan D.I. Aldabash, Füsun Balık Şanlı • International Journal of Environment and Geoinformatics (2016)

Sediment load materials is one of the key factors that determine the surface water quality, both of oceanic and river water, and it specifies water optical properties. Thus it provides a background for a plenty of applications and project...

DOAJ Open Access (DOAJ) DOI: 10.30897/ijegeo.304414

Foraminifera as environmental bioindicators on the Rio Grande Terrace: a preliminary assessment

João Machado Neto, Simone Souza Moraes, Edgar Romeo Herrera de Figueiredo Iza, Felipe Rocha Abreu et al. • Journal of the Geological Survey of Brazil (2025)

There is still a significant gap in research that integrates foraminiferal data with water mass characterization within the specific context of marine phosphorite prospecting. Therefore, this study investigates the environmental dynamics of...

DOAJ Open Access (DOAJ) DOI: 10.29396/jgsb.2026.v9.n2.6

Selenium Nanoparticle-Enriched and Potential Probiotic, <i>Lactiplantibacillus plantarum</i> S14 Strain, a Diet Supplement Beneficial for Rainbow Trout

Francisco Yanez-Lemus, Rubén Moraga, Carlos T. Smith, Paulina Aguayo et al. • Biology (2022)

Lactic acid bacteria (LAB), obtained from rainbow trout (Oncorhynchus mykiss) intestine, were cultured in MRS medium and probiotic candidates. Concurrently, producers of elemental selenium nanoparticles (Se0Nps) were selected. Probiotic can...

DOAJ Open Access (DOAJ) DOI: 10.3390/biology11101523

Methane emission offsets carbon dioxide uptake in a small productive lake

Dominic Vachon, Timon Langenegger, Daphne Donis, Stan E. Beaubien et al. • Limnology and Oceanography Letters (2020)

Abstract Here, we investigate the importance of net CH4 production and emissions in the carbon (C) budget of a small productive lake by monitoring CH4, CO2, and O2 for two consecutive years. During the study period, the lake was mostly a ne...

DOAJ Open Access (DOAJ) DOI: 10.1002/lol2.10161

Improved InSAR Deformation Time Series with Multi-Stable Points Technique for Atmospheric Correction

Baohang Wang, Guangrong Li, Chaoying Zhao, Liye Yang et al. • Geosciences (2026)

Potential tropospheric noise is a critical factor that undermines the effectiveness of deformation monitoring in Synthetic Aperture Radar Interferometry (InSAR) technologies. In most scenarios, many point targets within the InSAR deformatio...

DOAJ Open Access (DOAJ) DOI: 10.3390/geosciences16020059

Impact assessment of the farming–breeding–bioenergy integrated system on agricultural greenhouse gases in Northeast China

Zhe Zhao, Yi Zhang, You Xu, Sijian Jiang • Chinese Journal of Population, Resources and Environment (2025)

ABSTRACT: In this study, we constructed an integrated framework of a farming–breeding–bioenergy system to estimate the greenhouse gas (GHG) emission inventories of various farming and breeding processes in the northeast region of China from...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.cjpre.2025.10.010

Decision Support System for Technology Deployment Considering Emergent Behaviors in the Maritime Industry

Kazuo Hiekata, Zhinan Zhao • Journal of Marine Science and Engineering (2022)

The maritime industry is trying to utilize new technology for enhancing its competitiveness to overcome today’s severe economic situation, and some interact effects, or potentially emergent effects, will emerge during the introduction of th...

DOAJ Open Access (DOAJ) DOI: 10.3390/jmse10020263