98%
921
2 minutes
20
Large constellations of low-orbit satellites have already been launched with the aim of offering complete worldwide coverage of broadband Internet; however, compact, simple, and low-cost mobile terminals are necessary to establish the communication. This paper describes the design of a reconfigurable and compact filtenna with the ability to switch between the satellites' uplink and downlink frequencies, 20 GHz and 29 GHz, maintaining an excellent performance. Due to its simplicity, efficiency, and Rx/Tx isolation, this antenna is a relevant candidate to be part of mobile terminals and devices, or even sensors, that communicate with satellites.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219659 | PMC |
http://dx.doi.org/10.3390/s20082333 | DOI Listing |
Oxf Open Digit Health
August 2025
Department of Health Policy Planning and Management, Makerere University College of Health Sciences, School of Public Health, Mulago Hill-Road. P.O.Box, 7072, Kampala, Uganda.
Background: This study explored reasons why respondents neither initiate nor complete an interactive voice response (IVR) survey and whether call-backs by a human can increase subsequent IVR survey participation.
Methods: We conducted a mixed methods study. Using random digit dialing (RDD), participants were sent an IVR survey (IVR-RDD) to their mobile phone.
Med Klin Intensivmed Notfmed
September 2025
Mobile Ethikberatung in Lippe (MELIP), Tulpenweg 21, 32657, Lemgo, Deutschland.
Intensive care medicine symbolizes a form of medicine that seeks to prevent or overcome illness and life-threatening situations in order to enable a life that is acceptable to the patient. Despite the curative goal, dying and death are unavoidable. For ethically founded intensive care medicine, treatment goals must be agreed upon.
View Article and Find Full Text PDFTransl Vis Sci Technol
August 2025
Nankai University Eye Institute, Nankai University, Tianjin, China.
Purpose: Identifying and monitoring the onset and progression of myopia (myopia onset and progression [MOP]) based on the changes in anatomical structures in fundus retinal images has significant clinical application prospects. For this purpose, we tested the performance of deep neural networks.
Methods: We established a deep neural network, called Myopic-Net, to detect anatomical changes owing to the MOP from a pair of retinal images collected during different fundoscopies.
Anaesthesiologie
September 2025
Klinik für Anästhesiologie und Intensivmedizin, CCM/CVK, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin und Humboldt-Universität zu Berlin, Berlin, Deutschland.
The primary goal of intensive care medicine is to overcome a critical phase of illness using all available means and to enable patients to survive and return to an independent life without intensive care. However, this therapeutic goal cannot always be achieved. The possibility of death, the need to alleviate suffering, and respect for the end of life make it necessary to integrate palliative approaches into intensive care medicine.
View Article and Find Full Text PDFJMIR Mhealth Uhealth
August 2025
Africa Health Research Institute, Krith Building, Third Floor, 719 Umbilo Rd, Durban, 4001, South Africa, 27 315210455.
Background: Smartphones provide a precise method to study human mobility at an unprecedented scale, allowing researchers to explore the links between mobility, HIV risk, and treatment outcomes. However, leveraging smartphone technology to study HIV risk in rural settings presents unique challenges and opportunities.
Objective: This study assessed the feasibility of using smartphone GPS technology to collect mobility data from young adults in rural KwaZulu Natal, South Africa.