Showing 20 of 501 academic articles
Ye.O. Antonenko, Y.V. Antonenko, D.O. Shtoda, V.O. Katrich et al. • Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка
(2022)
Relevance. The creation of antenna arrays for communication systems is an urgent task in the unmanned aviation industries, in particular, for video signal transmission systems. Also, the relevance of the work is due to the need to use direc...
DOAJ
Open Access (DOAJ)
DOI: 10.26565/2311-0872-2022-37-08
Xiangmeng Lin, Junyi Zhang, Kai Yuan, Ziyang Zhao et al. • AIP Advances
(2025)
Previous studies have shown that terahertz (THz) signals could penetrate hypersonic plasma sheaths. Thus, it is considered to be a potential solution to the “blackout” problem. Nevertheless, although previous studies have systematically rev...
DOAJ
Open Access (DOAJ)
DOI: 10.1063/5.0281985
Majid Zamiri, João Sarraipa, Luis M. Camarinha-Matos, Ricardo Jardim-Goncalves • Applied Sciences
(2022)
Mass collaboration can bring about major transformative changes in the way people can work collectively. This emerging paradigm promises significant economic and social benefits and enhanced efficiency across a range of sectors, including l...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/app12168356
Mario Fargnoli, Luca Murgianu • Applied Sciences
(2023)
Nowadays, services related to IT technologies have assumed paramount importance in most sectors, creating complex systems involving different stakeholders. Such systems are subject to unpredictable risks that differ from what is usually exp...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/app132011132
Sergio Nesmachnow, Claudio Risso • Applied Sciences
(2021)
This article addresses timetable synchronization in public transportation, an important problem in modern smart cities, in order to guarantee a proper quality of service to citizens. Two variants of the bus timetabling synchronization probl...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/app11157138
Antonín Bohačík, Radek Fujdiak • Smart Cities
(2024)
The use of digital twins (DTs) in the electric power industry and other industries is a hot topic of research, especially concerning the potential of DTs to improve processes and management. This paper aims to present approaches to the crea...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/smartcities7050105
Mubarak Yakubova, Olga Manankova, Assel Mukasheva, Alimzhan Baikenov et al. • Applied Sciences
(2023)
The research problem described in this article is related to the security of an IP network that is set up between two cities using hosting. The network is used for transmitting telephone traffic between servers located in Germany and the Ne...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/app131910712
Qimao Liu, Jing Zhang, Liubin Yan • Shock and Vibration
(2012)
This paper developed an effective optimization method, i.e., gradient-Hessian matrix-based method or second order method, of frame structures subjected to the transient loads. An algorithm of first and second derivatives of dynamic displace...
DOAJ
Open Access (DOAJ)
DOI: 10.3233/SAV-2012-0685
Ali Davoodi, Homayoun H. Zadeh, Morteza Daliri Joupari, Mohammad Ali Sahebalzamani et al. • AIP Advances
(2020)
Plasma surface treatment has a wide range of applications in biomedicine. In the present study, flat polylactic acid (PLA) films were treated with oxygen and nitrogen, low-pressure, non-thermal plasma. The water contact angle of the PLA fil...
DOAJ
Open Access (DOAJ)
DOI: 10.1063/5.0022306
Ji-seong Chae, Jae-Hyuk Oh • European Physical Journal C: Particles and Fields
(2025)
Abstract We explore the mathematical relationship between the holographic Wilsonian renormalization group (HWRG) and stochastic quantization(SQ) motivated by the similarity of the monotonicity in RG flow with Langevin dynamics of non-equili...
DOAJ
Open Access (DOAJ)
DOI: 10.1140/epjc/s10052-025-14037-9
G. Angloher, M. R. Bharadwaj, A. Böhmer, M. Cababie et al. • European Physical Journal C: Particles and Fields
(2026)
Abstract Thallium-doped sodium iodide (NaI(Tl)) scintillation detectors play an important role in the field of direct dark matter (DM) searches. The DAMA/LIBRA experiment stands out for its reported observation of an annually modulating DM-...
DOAJ
Open Access (DOAJ)
DOI: 10.1140/epjc/s10052-026-15738-5
Ian McConachie, Anna de Graaff, Michael V. Maseda, Joel Leja et al. • The Astrophysical Journal
(2026)
At low redshift, massive quiescent galaxies (MQGs) are most frequently found in massive, rich galaxy clusters, but at high redshift the trend is less clear. Here, we present spectroscopic evidence of the effects of environment on the format...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/aea6b5
Jia-Hui Wang, Maosheng Xiang, Ji-Feng Liu • The Astrophysical Journal
(2025)
Intergalactic wandering stars (IWSs) within 10 Mpc remain a poorly explored area of astronomy. Such stars, if they exist, are supposed to be wandering objects as they are not bound by the gravitational potential of any galaxy. We set out to...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/adf8c8
Noé Lugaz • Space Weather
(2025)
Abstract Are we moving into a new reality where the next human stepping onto a different world will utter “That's one small step for me, a giant leap for my country”? Is further tightening Heliophysics and space weather research to military...
DOAJ
Open Access (DOAJ)
DOI: 10.1029/2025SW004707
Silvia Dedu, Florentin Șerban • Entropy
(2026)
Traditional mean–variance portfolio optimization proves inadequate for cryptocurrency markets, where extreme volatility, fat-tailed return distributions, and unstable correlation structures undermine the validity of variance as a comprehens...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e28030285
Yeon-Moon Choo, Ji-Min Kim, Ik-Tae An • Entropy
(2021)
Since the 1960s, many rivers have been destroyed as a consequence of the process of rapid urbanization. As accurate figures are important to repair rivers, there have been many research reports on methods to obtain the exact river slope and...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e23080965
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst • Physics Letters B
(2024)
Over the last few years, low- and high-redshift observations set off tensions in the measurement of the present-day expansion rate H0 and in the determination of the amplitude of the matter clustering in the late Universe (parameterized by ...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.physletb.2024.138775
Parinya Karndumri, Patharadanai Nuchino • European Physical Journal C: Particles and Fields
(2019)
Abstract We give a large class of supersymmetric domain walls in maximal seven-dimensional gauged supergravity with various types of gauge groups. Gaugings are described by components of the embedding tensor transforming in representations ...
DOAJ
Open Access (DOAJ)
DOI: 10.1140/epjc/s10052-019-7168-7
Wei-Shu Hou, Tanmoy Modak, Gwo-Guang Wong • European Physical Journal C: Particles and Fields
(2019)
Abstract Purely leptonic B meson decays provide unique probes for physics Beyond the Standard Model. We study the impact of a scalar leptoquark, $$S_1$$ S1 , on $$B \rightarrow \mu \bar{\nu }$$ B→μν¯ decay. We find that, for $$m_{S_1}\sim 1...
DOAJ
Open Access (DOAJ)
DOI: 10.1140/epjc/s10052-019-7490-0
Bruce G. Elmegreen, Daniela Calzetti, Angela Adamo, Karin Sandstrom et al. • The Astrophysical Journal
(2025)
Power spectra (PS) of high-resolution images of M51 (NGC 5194) taken with the Hubble Space Telescope and the James Webb Space Telescope (JWST) have been examined for evidence of disk thickness in the form of a change in slope between large ...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/adcee6