Results 271 to 280 of about 3,111,927 (377)

Association Between Availability and Quality of Health Services in Schools and Reproductive Health Outcomes Among Students: A Multilevel Observational Study

open access: green, 2012
Simon Denny   +13 more
openalex   +2 more sources

Energy Focusing Metasurface Based Wireless Power Transfer System for Compact Unmanned Mobilities

open access: yesAdvanced Optical Materials, EarlyView.
A miniaturized wireless power transfer system integrates a metasurface lens, microstrip patch antenna, and RF‐CMOS rectifier to enhance mmWave reception efficiency and reduce size. Leveraging mmWave short wavelengths, it achieves high gain on small platforms. The system's polarization independence and wide‐angle reception ensure robust performance.
Wonwoo Lee   +7 more
wiley   +1 more source

Technology-mediated training programs for school health teams on special health care needs: a scoping review. [PDF]

open access: yesRev Esc Enferm USP
Pires MDCCM   +6 more
europepmc   +1 more source

Optical Wireless Communications with Metasurfaces: Current Status and Potential for Intelligent Communications

open access: yesAdvanced Photonics Research, EarlyView.
Optical wireless communications (OWCs) provide a promising alternative to spectrum‐congested microwave wireless communications. Recently, the use of metasurfaces with sub‐wavelength features for dynamic beam steering, beam manipulation, and spatial or optical‐angular‐momentum mode generation, conversion, and multiplexing in OWCs is proposed and ...
Ke Wang   +7 more
wiley   +1 more source

Facile Functionalization of Separator with an Amino Acid to Boost Li–S Battery Performance

open access: yesAdvanced Sustainable Systems, EarlyView.
This study introduces a viable bio‐approach to functionalize conventional separators using leucine‐polyacrylic acid (Leu‐PAA) via the simple soaking method. This strategy synergistically improves polysulfide trapping, regulates lithium‐ion flux, and enhances thermal and mechanical stability, leading to excellent cycling stability.
Lulu Ren   +5 more
wiley   +1 more source

Assistance practice review in a health unit: experience developed in a school-service integration project

open access: diamond, 1995
Maria Tereza Teles Santos   +3 more
openalex  

Perceptions of school nurses and principals towards nurse role in providing school health services in Qatar

open access: bronze, 2013
Layla AL-Dahnaim   +4 more
openalex   +1 more source

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