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The Effect of Mutual Coupling on a High Altitude Platform Diversity System Using Compact Antenna Arrays

Tommy Hult, Abbas Mohammed • International Journal of Antennas and Propagation (2010)

We analyze the destructive effects of mutual coupling and spatial correlation between the separate antenna elements on a combined diversity system consisting of multiple HAPs (High-Altitude Platforms) employing various compact MIMO (Multipl...

DOAJ Open Access (DOAJ) DOI: 10.1155/2010/492915

The Impact of Phase-Locked Loop (PLL) Architecture on Sub-Synchronous Control Interactions (SSCI) for Direct-Driven Permanent Magnet Synchronous Generator (PMSG)-Based Type 4 Wind Farms

Arslan Ashraf, Muhammad Saadi • World Electric Vehicle Journal (2023)

Electric vehicles (EVs) are a promising solution to reduce carbon dioxide (CO2) emissions, but this reduction depends on the fraction of renewable sources used to generate electricity. Wind energy is thus a vital candidate and has experienc...

DOAJ Open Access (DOAJ) DOI: 10.3390/wevj14080206

Predicting Method for Lining External Water Pressure Reduction Coefficient Based on Equivalent Stable Drainage Volume Principle

GAO Xin, FENG Shijie, ZHANG Lianqing • Chengshi guidao jiaotong yanjiu (2025)

[Objective] By establishing a numerical seepage analysis model that aligns with real drainage systems and introducing the concept of a ′virtual permeability coefficient′ for secondary lining, the objective is to delve into the correlation b...

DOAJ Open Access (DOAJ) DOI: 10.16037/j.1007-869x.2025.03.050

Low-carbon urban transportation: Optimizing mechanical systems for sustainable electric bus and BRT deployment in Kampala

Ismail Kimuli, John Baptist Kirabira • Transportation Engineering (2026)

Kampala faces increasing congestion, air pollution, and dependence on fossil fuels, driven by widespread reliance on diesel minibuses and motorcycle taxis. Existing models—KAMPALA-TIMES, KLAP-TIMES, and GKMA-TIMES–CGE—show strong potential ...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.treng.2025.100417

Control Strategies, Economic Benefits, and Challenges of Vehicle-to-Grid Applications: Recent Trends Research

Guangjie Chen, Zhaoyun Zhang • World Electric Vehicle Journal (2024)

With the rapid growth in the number of EVs, a huge number of EVs are connected to the power grid for charging, which places a great amount of pressure on the stable operation of the power grid. This paper focuses on the development of V2G a...

DOAJ Open Access (DOAJ) DOI: 10.3390/wevj15050190

Reputation assessment mechanism for carpooling applications based on clustering user travel preferences

Athanasios Salamanis, Dionysios D. Kehagias, Dimitrios Tsoukalas, Dimitrios Tzovaras • International Journal of Transportation Science and Technology (2019)

One way to ensure sustainable and environmental friendly mobility is the use of less vehicles for carrying more passengers, and carpooling is a means to achieve this goal. One major concern in carpooling services is related to trust, as car...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.ijtst.2018.08.002

MEMS-Reconfigurable Metamaterials and Antenna Applications

Tomislav Debogovic, Julien Perruisseau-Carrier • International Journal of Antennas and Propagation (2014)

This paper reviews some of our contributions to reconfigurable metamaterials, where dynamic control is enabled by microelectromechanical systems (MEMS) technology. First, we show reconfigurable composite right-/left-handed transmission line...

DOAJ Open Access (DOAJ) DOI: 10.1155/2014/138138

Design of a Circularly Polarized Galileo E6-Band Textile Antenna by Dedicated Multiobjective Constrained Pareto Optimization

Arnaut Dierck, Frederick Declercq, Thomas Vervust, Hendrik Rogier • International Journal of Antennas and Propagation (2015)

Designing textile antennas for real-life applications requires a design strategy that is able to produce antennas that are optimized over a wide bandwidth for often conflicting characteristics, such as impedance matching, axial ratio, effic...

DOAJ Open Access (DOAJ) DOI: 10.1155/2015/895963

Effects of adding bamboo fiber on various aspects of concrete performance: A state-of-the-art review

Longping Yan, Muwang Wei, Lei Huang, Huawei Li et al. • KSCE Journal of Civil Engineering (2026)

This review systematically examines the role of bamboo fiber (BF) in enhancing the performance of cement-based composites, with a particular focus on workability, mechanical properties, durability, and sustainability. BF, as a renewable and...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.kscej.2026.100676

Designing Functional Carriage of High-Speed Medical Train – Systematic Analysis and Evaluation of Tasks, Functions and Flow Routes

Yi Zhao, Yongmeng Wu, DiDi Yan, Zerui Xiang et al. • Promet (Zagreb) (2023)

This paper proposes a functional carriage design and an evaluation index system to improve the operational efficiency of high-speed medical trains. Hierarchical task analysis and human-machine-environment analysis were applied to model the ...

DOAJ Open Access (DOAJ)

Genome-scale consequences of cofactor balancing in engineered pentose utilization pathways in Saccharomyces cerevisiae.

Amit Ghosh, Huimin Zhao, Nathan D Price • PLoS ONE (2011)

Biofuels derived from lignocellulosic biomass offer promising alternative renewable energy sources for transportation fuels. Significant effort has been made to engineer Saccharomyces cerevisiae to efficiently ferment pentose sugars such as...

DOAJ Open Access (DOAJ) DOI: 10.1371/journal.pone.0027316

Accuracy Analysis of Convergence Monitoring in Twin-tube Shield Tunnels Using Mobile Laser Scanning

WANG Xinhong, XIA Caichu, HU Guojin, WU Ting et al. • Chengshi guidao jiaotong yanjiu (2025)

[Objective] Mobile 3D laser scanning technology is widely applied in single-tube tunnel monitoring due to its excellent measurement efficiency and high accuracy. However, the application of this technology for deformation monitoring in twin...

DOAJ Open Access (DOAJ) DOI: 10.16037/j.1007-869x.20230782

Hierarchical ordered logistic regression analysis of urban rail transit driver fatigue determinants: impact of emotion regulation and sleep patterns

Juanli Du, Zhiqiang Sun, Chaozhe Jiang • Scientific Reports (2026)

Abstract Urban rail transit (URT) drivers play a crucial role in ensuring operational safety; however, existing literature lacks in-depth research on the underlying mechanisms influencing driver fatigue in URT systems. To fill this gap, thi...

DOAJ Open Access (DOAJ) DOI: 10.1038/s41598-026-44865-y

A study on de-icing for railway turnouts using 250kHz-200W-class induction heating system

Hyeong-Seok Oh, Chan-Bae Park, Seung-Hwan Lee, Jae-Bum Lee et al. • AIP Advances (2019)

In this paper, to complement the capability of the existing heating system using an electric-heating wire for melting snow and ice in railway turnouts, 250kHz-200W-class Induction Heating (IH) system was designed. The IH system consists of ...

DOAJ Open Access (DOAJ) DOI: 10.1063/1.5129857

A Space Vector Based Zero Common-Mode Voltage Modulation Method for a Modular Multilevel Converter

Guozheng Zhang, Shuo Wang, Chen Li, Xinmin Li et al. • World Electric Vehicle Journal (2023)

A modular multilevel converter (MMC) can generate different common-mode voltage (CMV) values due to the high-frequency changing of the switching state under various modulation strategies. The high-frequency dv/dt will produce common-mode cu...

DOAJ Open Access (DOAJ) DOI: 10.3390/wevj14020053