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Investigation of the Friction Performance of G3000 (Variant), GG20, and GG15 (High Carbon) Cast Brake Discs Using the SAE J2522 Procedure

Talha İkbal Çığır, Melih Hakan Samur, Mevlüt Yasin Igdeli • International Journal of Automotive Science and Technology (2025)

This study compares the friction performance of three commonly used cast brake disc materials in the automotive industry: the G3000 variant, GG20, and GG15 (high carbon content). Samples were tested on an inertia dynamometer following the S...

DOAJ Open Access (DOAJ) DOI: 10.30939/ijastech..1811564

Natural Earth Pigments as Geological Polymineral Systems: A Structured Approach to Provenance and Degradation Assessment in Heritage Science

Sebastiano Ettore Spoto, Roberta Somma • Heritage (2026)

Natural earth pigments are polymineral materials whose present composition may differ from the source because of selection, grinding, heating, mixing, binder incorporation, and later alteration. This study develops a structured method for s...

DOAJ Open Access (DOAJ) DOI: 10.3390/heritage9080322

Weirs in the Waterworks of the Tsarev Settlement

Savel’ev Nikita I. • Поволжская археология (2013)

The location and design of weirs as part of water supply system on the Tsarev settlement and its neighborhood are considered in the article. The descriptions of the 19th – early 20th cc. and archaeological data made it possible to establish...

DOAJ Open Access (DOAJ) DOI: 10.24852/pa2013.4.6.155.166

Sensitivity Analysis and Uncertainty Quantification of Nanoparticle Deposition from Tongue Morphological Variations

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

The Numerical Solution of Fractional Parabolic Partial Integro-Differential Eequations by Gaussian and Inverse Multiquadric Radial Basis Functions

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)

Numerical Simulation of an Intramedullary Elastic Nail: Expansion Phase and Load-Bearing Behavior

Giulia Pascoletti, Filippo Cianetti, Giovanni Putame, Mara Terzini et al. • Frontiers in Bioengineering and Biotechnology (2018)

The Marchetti-Vicenzi's nail is an intramedullary device where six curved nails are kept straight by a closing ring in order to allow their insertion into the medullary canal of a long bone; in a following step, these nails stabilize the fr...

DOAJ Open Access (DOAJ) DOI: 10.3389/fbioe.2018.00174

Research on the Quality Variation Patterns During the Fermentation Process of Coffee-Grounds Craft Beer

Jiashun Jiang, Jingan Yang, Tong Zhu, Yongjin Hu et al. • Foods (2025)

To investigate the metabolic differences and mechanisms during the fermentation process of coffee-grounds craft beer, HS-SPME-GC/MS untargeted metabolomics technology was used to study the metabolic differences during the fermentation proce...

DOAJ Open Access (DOAJ) DOI: 10.3390/foods14061014

Active Participation and Interaction, Key Performance Factors of Face-to-Face Learning

Miguel Marco-Fondevila, Mar Rueda-Tomás, María Pilar Latorre-Martínez • Education Sciences (2022)

During the last decade and, particularly, from the restrictions on mobility brought by the COVID-19 pandemic, online and digital teaching is positioning itself as an alternative to face-to-face teaching. As of today, however, the soundness ...

DOAJ Open Access (DOAJ) DOI: 10.3390/educsci12070429

Effects of supplementing sweet sorghum with grapeseeds on carcass parameters, and meat quality, amino acid, and fatty acid composition of lambs

Jianxin Jiao, Ting Wang, Shanshan Li, Nana Gou et al. • Animal Bioscience (2023)

Objective Sweet sorghum is an important forage crop for ruminants, especially in low rainfall areas. Grapeseeds are an abundant by-product of wine-making and contain bioactive substances that can improve the antioxidant capacity of meat. We...

DOAJ Open Access (DOAJ) DOI: 10.5713/ab.22.0189

Using DNA metabarcoding and a novel canid-specific blocking oligonucleotide to investigate the composition of animal diets of raccoon dogs (Nyctereutes procyonoides) inhabiting the waterside area in Korea

Cheolwoon Woo, Priyanka Kumari, Kyung Yeon Eo, Woo-Shin Lee et al. • PLoS ONE (2022)

The raccoon dog (Nyctereutes procyonoides) is known to be an opportunistic generalist who feeds on a wide variety of foods. Historically, their diet has been investigated by morphological observation of undigested remains in feces, requirin...

DOAJ Open Access (DOAJ)

Habitat availability shapes composition and climate change response of alpine butterfly communities

Korbinian Schrauth, Matthias Plattner, Jörg Müller, Jérôme Pellet • Alpine Entomology (2026)

Climate change is known to cause range shifts to higher elevations in mountainous regions. Butterflies are especially sensitive to changes in environmental conditions and their response to climate change has been extensively studied. Howeve...

DOAJ Open Access (DOAJ) DOI: 10.3897/alpento.10.186978

Bird diversity in the Serra do Aracá region, northwestern Brazilian Amazon: preliminary check-list with considerations on biogeography and conservation

Sérgio Henrique Borges, Andrew Whittaker, Ricardo Afonso Machado de Almeida • Zoologia (Curitiba) (2014)

We inventoried the birds from Serra do Aracá region, state of Amazonas. The region encompasses a high diversity of vegetation types, including white sand forests and campinas, terra firme and flooded forests, montane forests and tepuis. We ...

DOAJ Open Access (DOAJ) DOI: 10.1590/S1984-46702014000400006

Fluid-Solid Interaction Analysis of a Flow Passing Cylinder Based on Variational Mode Decomposition

Zuo Yaju, Fang Mingkun, Zhu Di, Lu Jiahao et al. • E3S Web of Conferences (2024)

The fluid-structure interaction problem of cylindrical flow around the cylinder is a classic problem, especially in many fields such as energy engineering, fluid dynamics, engineering structure, energy utilization and development, and envir...

DOAJ Open Access (DOAJ) DOI: 10.1051/e3sconf/202452001017

Numerical simulation of gravity-driven motion of fine-grained sediment deposits in large reservoirs: case study of the Three Gorges Reservoir

JIA Dongdong, ZHOU Jianyin, SHAO Xuejun, ZHANG Xingnong • Shui kexue jinzhan (2018)

Sediment deposition is one of the key issues during the processes of reservoir construction and operation. On the basis of the observed sedimentation patterns in the dam area of Three Gorges Reservoir (TGR), a schematic diagram of fine-grai...

DOAJ Open Access (DOAJ) DOI: 10.14042/j.cnki.32.1309.2018.01.007

Hydrogeochemical Characterization and Appraisal of Groundwater Quality in Yisr River Catchment, Blue Nile River Basin, Ethiopia, by Using the GIS, WQI, and Statistical Techniques

Abebaw Demelash, Abunu Atlabachew, Muralitharan Jothimani, Abel Abebe • Journal of Chemistry (2023)

Groundwater is a primary drinking, agricultural, domestic, and nondomestic water source in Ethiopia’s Yisr River watershed of the Blue Nile River basin. There has been no systematic investigation of the hydrogeochemical properties of ground...

DOAJ Open Access (DOAJ) DOI: 10.1155/2023/8199000

Coastal wave-energy attenuation by artificial wooden fences deployed for mangrove restoration: an experimental study

Anping Shu, Jiapin Zhu, Baoshan Cui, Le Wang et al. • Frontiers in Marine Science (2023)

By offering natural protection along offshore wetlands, mangroves play a crucial role in providing great ecological and economic benefits to local communities. However, mangroves are currently facing an increasing threat of decline worldwid...

DOAJ Open Access (DOAJ) DOI: 10.3389/fmars.2023.1165048

Adaptive Tracking Control of Anchoring Unit for Pipeline Intelligent Plugging Robot Based on Improved Deep Deterministic Policy Gradient

Tingting Wu, Yaxin Liu, Laihe Qi, Pu Wang et al. • Machines (2026)

A pipeline intelligent plugging robot (PIPR) is an important tool in subsea pipeline maintenance and emergency repair. Precise position-tracking control is crucial for the in-pipe plugging operation of a PIPR. The anchoring module is the ke...

DOAJ Open Access (DOAJ) DOI: 10.3390/machines14060675

Influence of check dams on water and sediment processes and deposition patterns under simulated rainfall conditions

Zhiwei Cui, Peng Li, Tian Wang, Shaobo Xue et al. • Geoderma (2024)

The Loess Plateau in China has the highest soil erosion and water loss rates in the world. Therefore, check dams, which are more useful engineering measures, have been established to improve soil and water conservation in small watershed. T...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.geoderma.2023.116758

Arbuscular mycorrhizal fungi contribute to wheat yield in an agroforestry system with different tree ages

Xu Qiao, Xu Qiao, Tao Sun, Tao Sun et al. • Frontiers in Microbiology (2022)

Intercropping achieved through agroforestry is increasingly being recognized as a sustainable form of land use. In agroforestry, the roots of trees and crops are intermingled, and their interactions and the production of exudates alter the ...

DOAJ Open Access (DOAJ) DOI: 10.3389/fmicb.2022.1024128