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Academic Articles & Research Papers
Showing 20 of 1,656 academic articles
Mahdi Mottaghipour • آموزش مهندسی ایران
(2016)
Although 3D printing is only two decades old, dramatic improvements have occurred in the production cycle. At the present time many big industrial centers, such as the automotive industry, medical equipment industry, military industries, as...
DOAJ
Open Access (DOAJ)
DOI: 10.22047/ijee.2016.16243
Deyu Jiang, Miao Luo, Changxi Liu, Yashuo Zhang et al. • Virtual and Physical Prototyping
(2025)
In this study, a Ti1.5Nb1Ta0.5Zr1Mo0.5 (TNTZM) high-entropy alloy was fabricated using laser powder bed fusion (LPBF). By integrating 63 sets of parameter trials with machine learning (ML) models, an optimised process window was identified,...
DOAJ
Open Access (DOAJ)
DOI: 10.1080/17452759.2025.2524524
Roberto López-Chila, Henry Abad-Reyna, Joao Morocho-Cajas, Pablo Fierro-Jimenez • Vehicles
(2025)
Standardized driving cycles such as the FTP-75 fail to represent traffic conditions in cities like Guayaquil, where high congestion and varied driving behaviors are not captured by external models. This study aimed to develop representative...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/vehicles7030095
Chaoqun Zeng, Jing-Pu Tang, Liangliang Wei, Miaochang Zhu et al. • Buildings
(2026)
Reinforced concrete (RC) beams strengthened with carbon-fabric-reinforced cementitious matrix (CFRCM) systems have shown potential for restoring flexural performance, yet their effectiveness under different corrosion levels remains insuffic...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/buildings16020377
Ammar Jafaripournimchahi, Yingfeng Cai, Hai Wang, Lu Sun et al. • Journal of Advanced Transportation
(2022)
In this study, a novel traffic flow modeling framework is proposed considering the impact of driving system and vehicle mechanical behavior as two different units on the traffic flow. To precisely model the behavior of Connected and Autonom...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/2022/2253697
Tiancheng Yang, Xiuhua Si, Jinxiang Xi • Life
(2024)
The human tongue has highly variable morphology. Its role in regulating respiratory flows and deposition of inhaled aerosols remains unclear. The objective of this study was to quantify the uncertainty of nanoparticle deposition from the va...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/life14030406
F. S. Aghaei Maybodi, M. H. Heydari, F. M. Maalek Ghaeini, M. H. Akrami • پژوهشهای ریاضی
(2021)
Introduction
Many mathematical formulations of physical phenomena contain integro-differential equations. These equations arise in fluid dynamics, biological models, chemical kinetics, ecology, control theory of financial mathematics, aeros...
DOAJ
Open Access (DOAJ)
Wenjie Tian, Lili Zhang, Tao Yu, Dong Yao et al. • Atmosphere
(2024)
CO2 is one of the primary greenhouse gases impacting global climate change, making it crucial to understand the spatiotemporal variations of CO2. Currently, commonly used satellites serve as the primary means of CO2 observation, but they of...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/atmos15080985
Yaqiong Zhang, Fubin Wang, Jinchao Liu, Heng Zhao et al. • Aerospace
(2024)
The rotating blade is a key component of an aero-engine, and its vibration characteristics have an important impact on the performance of the engine and are vital for condition monitoring. This paper reviews the research progress of blade d...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/aerospace11080638
Senyefia Bosson-Amedenu, Emmanuel Ayitey, Francis Ayiah-Mensah, Luyton Asare • BMC Cancer
(2025)
Abstract Background Frailty models are extensively utilized in survival analysis to address unobserved heterogeneity among individuals. However, selecting the most robust model for survival prediction, especially in the context of high-dime...
DOAJ
Open Access (DOAJ)
DOI: 10.1186/s12885-025-14040-z
Pekka Korhonen, Francis K.C. Hui, Jenni Niku, Sara Taskinen et al. • PeerJ
(2025)
Background Over the past decade, joint species distribution models (JSDMs) and model-based ordination have emerged as powerful tools for the analysis of community ecology data. Generalized linear latent variable models (GLLVMs) offer a flex...
DOAJ
Open Access (DOAJ)
DOI: 10.7717/peerj.20338
Worlanyo Kwadjo Siabi, Emmanuel Degraft-Johnson Owusu-Ansah, Helen Michelle Korkor Essandoh, Nana Yaw Asiedu • Water-Energy Nexus
(2021)
Nearly 6494 boreholes with iron (Fe) and manganese (Mn) concentrations above permissible limits of 0.3 mg/L and 0.4 mg/L respectively in Ghana have been abandoned because of ineffective water treatment solutions. Activated carbon prepared f...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.wen.2021.02.001
Eric Nyarko, Irene A. Kretchy, Grace Lovia Allotey-Babington, Adwoa Oforiwaa Kwakye et al. • BMC Infectious Diseases
(2026)
Abstract Background Poor adherence to antiretroviral therapy (ART) continues to undermine HIV treatment outcomes in sub-Saharan Africa, including Ghana. Objective This study aimed to quantify ART treatment adherence among people living with...
DOAJ
Open Access (DOAJ)
DOI: 10.1186/s12879-026-13836-z
Samuel Kipsang Kaptum, Jane Aduda Akinyi, Philip Ngare, Amos Kipkorir Langat • Scientific African
(2025)
Herd behaviour in socio-economic systems is characterised by asynchronous, stochastic decision-making that traditional models capture imperfectly. Discrete-time DTMCs impose fixed-tick synchrony and require binning, which distorts event tim...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.sciaf.2025.e03042
George Ukam, Charles Adams, Atinuke Adebanji, Williams Ackaah • Cogent Engineering
(2024)
The nature of paratransit services makes for increased uncertainty in trip time, leading to reported unreliability and dissatisfaction by the users. While providing travel information has proved helpful in formal bus services and has been r...
DOAJ
Open Access (DOAJ)
DOI: 10.1080/23311916.2024.2386383
Olga Vishnyakova, Joosung Min, Stephen Leach, Xiaowei Song et al. • Communications Medicine
(2026)
Abstract Background Chronological age does not capture individual health or resilience. Advances in metabolomics have enabled development of molecular aging biomarkers that capture deviations between biological and chronological age, highli...
DOAJ
Open Access (DOAJ)
DOI: 10.1038/s43856-026-01375-2
Susan A. Kirkland, Lauren E. Griffith, Urun Erbas Oz, Mary Thompson et al. • BMC Public Health
(2023)
Abstract Background Older adults have been disproportionately impacted by COVID-19 and related preventative measures undertaken during the pandemic. Given clear evidence of the relationship between loneliness and health outcomes, it is impe...
DOAJ
Open Access (DOAJ)
DOI: 10.1186/s12889-023-15807-4
Tim Hill, Gwenn Elizabeth Flowers, Matthew James Hoffman, Derek Bingham et al. • Journal of Glaciology
(2024)
Subglacial hydrology models struggle to reproduce seasonal drainage patterns that are consistent with observed subglacial water pressures and surface velocities. We modify the standard sheet-flow parameterization within a coupled sheet–chan...
DOAJ
Open Access (DOAJ)
DOI: 10.1017/jog.2023.103
Tareq Saeed, Vinay Singh, Savin Treanţă, Solomon Lalmalsawma • Results in Control and Optimization
(2024)
In this paper, we introduce a new class of generalized (h,φ)-G-type I vector-valued functions, by combining the notions of (h,φ)-differentiable functions, G-invex functions, and type I functions. By using these new concepts, we formulate an...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.rico.2024.100395
Albert Whata, Charles Chimedza • IEEE Access
(2022)
Logistic regression (LR) is a popular method that is used for estimating causal effects in observational studies using propensity scores. We examine the use of deep learning models such as the deep neural network (DNN), PropensityNet (PN), ...
DOAJ
Open Access (DOAJ)
DOI: 10.1109/ACCESS.2021.3140189