The problem of optimal trajectory planning of the unmanned underwater vehicle (UUV) is considered and analytically solved. The task is to minimize the risk of detection of the moving object by a static sonar while moving between two given points on a plane. The detection is based on the primary acoustic field radiated by the object with a non-uniform radiation pattern. In the first part of the article, the probability of non-detection is derived. Further, it is used as an optimization criterion. The non-uniform radiation pattern of the object differentiates this work from previous research in the area. The optimal trajectory and velocity law of the moving object are found, as well as the criterion value on it.
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http://dx.doi.org/10.3390/s20072076 | DOI Listing |
Bioelectromagnetics
February 2025
Department of Crop Science, Universidade Estadual de Mato Grosso do Sul (UEMS), Cassilândia, Mato Grosso do Sul, Brazil.
Effects of 60 Hz non-uniform electromagnetic fields (EMFs) on the tomato (cv. L-05) seed germination, photosynthesis, and seedling growth under salt stress and laboratory conditions were investigated. A previous trial investigated the impact of salt stress levels (0, 40, 60, 80, and 100 mM NaCl) on tomato seeds, and the 100 mM NaCl level was selected to study the effects of EMFs in attenuating salinity stress on germination, physiology, and growth of tomato seedlings.
View Article and Find Full Text PDFInt J Hyperthermia
December 2025
Gustavo S. Montana Distinguished Professor Emeritus of Radiation Oncology, Duke University School of Medicine, Durham, NC, USA.
This review was written to be included in the Special Collection 'Therapy Ultrasound: Medicine's Swiss Army Knife?' The purpose of this review is to provide basic presentation and interpretation of the fundamentals of hyperthermia biology, as it pertains to uses of therapeutic ultrasound. The fundamentals are presented but in the setting of a translational interpretation and a view toward the future. Subjects that require future research and development are highlighted.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Electrical Power and Machines Engineering, Higher Institute of Engineering, El-Shorouk Academy, El-Shorouk City, Cairo, Egypt.
Photovoltaic (PV) modules may encounter nonuniform situations that reduce their useable power volume, causing ineffective maximum power point tracking (MPPT). Moreover, due to the incorporation of bypass diodes, power-voltage (P-V) graph has multi-peaks when each component of the module receives different solar irradiation. This paper proposes a solution to this problem using an arithmetic optimization algorithm (AOA) for MPPT in PV systems operating in nonuniform situations.
View Article and Find Full Text PDFGels
December 2024
Research Center for Green Energy Systems, Department of Mechanical Engineering, Gachon University, Seongnam-si 13120, Republic of Korea.
This study aims to develop efficient and sustainable hydrogels for dye adsorption, addressing the critical need for improved wastewater treatment methods. Carboxymethyl cellulose (CMC)-based hydrogels grafted with AAc were synthesized using gamma radiation polymerization. Various AAc to CMC ratios (5:5, 5:7.
View Article and Find Full Text PDFFront Oncol
December 2024
Department of Radiation Oncology, The Third Affiliated Hospital of Kunming Medical University, Yunnan Tumor Hospital, Kunming, Yunnan, China.
Lung cancer is the most common malignant tumor in China. Its incidence and mortality rate increase year by year. In the synthesis treatment of lung cancer, radiotherapy (RT) plays a vital role, and radiation-induced lung injury(RILI) has become the major limiting factor in prescription dose escalation.
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