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Channel Code-Book (CCB): Semantic Image-Adaptive Transmission in Satellite-Ground Scenario.
Sensors (Basel)
January 2025
State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Satellite-ground communication is a critical component in the global communication system, significantly contributing to environmental monitoring, radio and television broadcasting, aerospace operations, and other domains. However, the technology encounters challenges in data transmission efficiency, due to the drastic alterations in the communication channel caused by the rapid movement of satellites. In comparison to traditional transmission methods, semantic communication (SemCom) technology enhances transmission efficiency by comprehending and leveraging the intrinsic meaning of information, making it ideal for image transmission in satellite communications.
View Article and Find Full Text PDFImproving the Orbit Injection Accuracy of a Launch Vehicle by Using a Mode-Switching Strategy for a Dual-Axis Rotational Inertial Navigation System.
Sensors (Basel)
December 2024
College of Aerospace and Engineering, National University of Defense Technology, Changsha 410073, China.
Due to a short flight time, the dual-axis rotational inertial navigation system carried by some launch vehicles or missiles is often only used for self-calibration and self-alignment. It is generally in the strap-down state rather than the rotation modulation state during flight. This wastes the precision potential of the navigation system.
View Article and Find Full Text PDFAcetogenesis to ethanologenesis: facilitating NADH oxidation via reductive acetate uptake.
Trends Biotechnol
January 2025
School of Environment and Energy Engineering, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea; Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea. Electronic address:
(Homo)acetogens, including Clostridium spp., represent an enigma in metabolic flexibility and diversity. Eubacterium callanderi KIST612 is an acetogen that produces n-butyrate with carbon monoxide (CO) as the carbon and energy source; however, the production route is unknown.
View Article and Find Full Text PDFElectromagnetic Wavefront Engineering by Switchable and Multifunctional Kirigami Metasurfaces.
Nanomaterials (Basel)
January 2025
Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Developing switchable and multifunctional metasurfaces is essential for high-integration photonics. However, most previous studies encountered challenges such as limited degrees of freedom, simple tuning of predefined functionality, and complicated control systems. Here, we develop a general strategy to construct switchable and multifunctional metasurfaces.
View Article and Find Full Text PDFUnderstanding Therapeutic Experience: A Qualitative Evaluation of Virtual and In-Person Treatment.
Cureus
December 2024
Psychiatry, Yale School of Medicine, New Haven, USA.
Introduction Following the COVID-19 pandemic, there was adoption of virtual psychotherapy. There are a number of benefits and drawbacks to telehealth video conferencing that are experienced by both clients and clinicians. The current qualitative study sought to outline the advantages and disadvantages that clients and clinicians have personally experienced in virtual versus in-person therapy in an effort to identify the reasons for which one medium may be preferred over another.
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