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Machine learning-based dynamic risk measurement for white sugar futures under geopolitical risks

Zihao Qiu, Siyu Chen, Zixin Feng, Ruitong Luo et al. • Frontiers in Physics (2025)

Futures, as significant financial derivatives, play a crucial role in financial markets by fulfilling price discovery functions and providing efficient risk hedging tools. Against the backdrop of geopolitical conflicts, market risk emerges ...

DOAJ Open Access (DOAJ) DOI: 10.3389/fphy.2025.1674717

A theory of algorithmic markets

Nagwan Alqershi, Nagwan Alqershi, Ramayah Thurasamy, Ramayah Thurasamy et al. • Frontiers in Complex Systems (2026)

This paper develops a dynamic framework for analyzing markets in which decision-making is increasingly delegated to adaptive algorithms. In contrast to classical approaches that treat equilibrium as the primitive object of analysis, the fra...

DOAJ Open Access (DOAJ) DOI: 10.3389/fcpxs.2026.1819789

Unsteady Aerodynamic Characteristics of a High-Speed Train Induced by the Sudden Change of Windbreak Wall Structure: A Case Study of the Xinjiang Railway

Zheng-Wei Chen, En-Ze Rui, Tang-Hong Liu, Yi-Qing Ni et al. • Applied Sciences (2022)

Under strong winds, the effect of sudden windbreak transition (WT) on high-speed trains is severe, leading to a deterioration of train aerodynamics and sudden yawing motion of the car body. To address these problems, based on a high-speed t...

DOAJ Open Access (DOAJ) DOI: 10.3390/app12147217

An Integrated Decision Support Model for Evaluating Public Transport Quality

Sarbast Moslem, Ahmad Alkharabsheh, Karzan Ismael, Szabolcs Duleba • Applied Sciences (2020)

Big cities suffer from serious complex problems such as air pollution, congestion, and traffic accidents. Developing public transport quality in such cities is considered an efficient remedy to obviate these critical issues. This paper aims...

DOAJ Open Access (DOAJ) DOI: 10.3390/app10124158

Effects of Titanate Coupling Agent on Engineering Properties of Asphalt Binders and Mixtures Incorporating LLDPE-CaCO3 Pellet

Mohd Rosli Mohd Hasan, Zhanping You, Mohd Khairul Idham Mohd Satar, Muhammad Naqiuddin Mohd Warid et al. • Applied Sciences (2018)

This study was initiated to evaluate the performance of asphalt binders and mixtures incorporating linear low-density polyethylene- calcium carbonate (LLDPE-CaCO3) pellet, either with or without titanate coupling agent. The detailed manufac...

DOAJ Open Access (DOAJ) DOI: 10.3390/app8071029

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

ELF and VLF signatures of sprites registered onboard the low altitude satellite DEMETER

J. Błęcki, J. Błęcki, M. Parrot, R. Wronowski • Annales Geophysicae (2009)

We report the observation of ELF and VLF signature of sprites recorded on the low altitude satellite DEMETER during thunderstorm activity. At an altitude of ~700 km, waves observed on the E-field spectrograms at mid-to-low latitudes duri...

DOAJ Open Access (DOAJ) DOI: 10.5194/angeo-27-2599-2009

Excitation thresholds of field-aligned irregularities and associated ionospheric hysteresis at very high latitudes observed using SPEAR-induced HF radar backscatter

D. M. Wright, R. S. Dhillon, T. K. Yeoman, T. R. Robinson et al. • Annales Geophysicae (2009)

On 10 October 2006 the SPEAR high power radar facility was operated in a power-stepping mode where both CUTLASS radars were detecting backscatter from the SPEAR-induced field-aligned irregularities (FAIs). The effective radiated power of...

DOAJ Open Access (DOAJ) DOI: 10.5194/angeo-27-2623-2009

Observations on Stratospheric-Mesospheric-Thermospheric temperatures using Indian MST radar and co-located LIDAR during Leonid Meteor Shower (LMS)

R. Selvamurugan, R. Selvamurugan, R. Selvamurugan, C. V. Devasia et al. • Annales Geophysicae (2002)

The temporal and height statistics of the occurrence of meteor trails during the Leonid meteor shower revealed the capability of the Indian MST radar to record large numbers of meteor trails. The distribution of radio meteor trails du...

DOAJ Open Access (DOAJ) DOI: 10.5194/angeo-20-1869-2002

Anomalous effect in Schumann resonance phenomena observed in Japan, possibly associated with the Chi-chi earthquake in Taiwan

M. Hayakawa, K. Ohta, A. P. Nickolaenko, A. P. Nickolaenko et al. • Annales Geophysicae (2005)

The Schumann resonance phenomenon has been monitored at Nakatsugawa (near Nagoya) in Japan since the beginning of 1999, and due to the occurance of a severe earthquake (so-called Chi-chi earthquake) on 21 September 1999 in Taiwan we have...

DOAJ Open Access (DOAJ) DOI: 10.5194/angeo-23-1335-2005

Settlement process of radioactive dust to the ground inferred from the atmospheric electric field measurement

M. Yamauchi, M. Takeda, M. Makino, T. Owada et al. • Annales Geophysicae (2012)

Radioactive materials from the accident at Fukushima Dai-ichi nuclear power plant (FNPP) in March 2011 spread over a large area, increasing the atmospheric electric conductivity by their ionizing effect, and reducing the vertical (downwa...

DOAJ Open Access (DOAJ) DOI: 10.5194/angeo-30-49-2012