Results 111 to 120 of about 482,360 (297)
Social and Environmental Factors Associated with Preschoolers' Non-sedentary Physical Activity [PDF]
, 2009 The two-fold purpose of the investigation was (1) to describe with direct observation data the physical activity behaviors and the accompanying social and environmental events of those behaviors for children in preschools; and (2) to determine which ...
Addy, Cheryl L. +5 more
core +2 more sources
Advanced Science, EarlyView.In this study, an electrostatically self‐assembled WPU‐MXene@FC flexible fabric constructs a “nest‐like” structure on fibers, building construct MXene multiple loss paths, achieving ultra‐wideband absorption of 25.3–1200 GHz in a thickness of 1.8 mm, while also exhibiting superhydrophobicity, acid and alkali resistance, and bending resistance ...
Min Luo +7 more
wiley +1 more source
Channel Dynamics and SNR Tracking in Millimeter Wave Cellular Systems
, 2016 The millimeter wave (mmWave) frequencies are likely to play a significant role in fifth-generation (5G) cellular systems. A key challenge in developing systems in these bands is the potential for rapid channel dynamics: since mmWave signals are blocked ...
Dhananjay, Aditya +4 more
core
Let\u27s get real: are today\u27s children playing with nature? Do the educational aspirations of the nature play movement emerge within children\u27s neighbourhood play? [PDF]
, 2016 The Irish Neighbourhood Play Research Project was a large scale research project which included almost 1700 participant families and 240 communities throughout Ireland.
McCormack, M +3 more
core +1 more source
Advanced Science, EarlyView.A self‐evolving Pd/Ov‐FeTiO3 photothermal catalyst, inspired by lunar soil, enables efficient extraterrestrial CO2 conversion. The formation of transient active interfaces and oxygen vacancies extends light absorption to the infrared range and optimizes electron transfer.
Yahang Wang +11 more
wiley +1 more source
Comparing Free Play and Partly Structured Play in 4-5-Years-Old Children in an Outdoor Playground
Frontiers in Public Health, 2019 The aim of this study was to compare how the organization of a movement session as partly structured play or free play influenced the physical activity engagement in 4–5 years old pre-schoolers.
Patrizia Tortella +6 more
doaj +1 more source
Metasurface‐Enabled Active‐Like Passive Radar
Advanced Science, EarlyView.A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li +7 more
wiley +1 more source
Complex Physical Activities, Outdoor Play, and School Readiness among Preschoolers
Global Education Review, 2018 High quality educational settings play a crucial role in preparing a child to enter kindergarten, but little work has explored how outdoor play and complex physical activity outside school and childcare settings promote school readiness among ...
Derek R. Becker +3 more
doaj
Outdoor play and the holistic development of learners in primary schools
Journal of South African Democratic Teachers Union, 2022 The holistic development of learners outside the classroom through outdoor play is the focus of this article. Play allows learners to expand their understanding of themselves and others, their knowledge of the physical world, and their ability to ...
S.P. Mokobe +2 more
doaj
Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems
Advanced Electronic Materials, EarlyView.Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang +9 more
wiley +1 more source