Results 31 to 40 of about 2,980,004 (332)

Neighborhood walkability, physical activity, and walking for transportation: A cross-sectional study of older adults living on low income

BMC Geriatrics, 2017
Background Walking, and in particular, outdoor walking, is the most common form of physical activity for older adults. To date, no study investigated the association between the neighborhood built environment and physical activity habits of older adults ...
Anna M. Chudyk, Heather A. McKay, Meghan Winters, Joanie Sims-Gould, Maureen C. Ashe   +4 more
doaj   +1 more source

Geovisualizing evolving population and built-up area in China, 2010–20

Regional Studies, Regional Science, 2023
China's population and development land have changed dramatically over the last decade. Yet, our understanding of the spatial distribution patterns of the population and built-up areas remains limited.
Xiaohong Chen, Xiang Liu, Yingjie Guo
doaj   +1 more source

Improved EECM for lithium-ion batteries under different current conditions

电力工程技术, 2023
Li-ion batteries are at the core of new energy vehicle powertrains. The model-based battery management system (BMS) is the key to ensure the full play of battery performance.
ZHANG Zhihang, HAN Xuebing, FENG Xuning, LU Languang, WANG Hewu, OUYANG Minggao   +5 more
doaj   +1 more source

Factors influencing fall prevention for patients with spinal cord injury from the perspectives of administrators in Canadian rehabilitation hospitals

BMC Health Services Research, 2019
Background Fall prevention is a priority in Canadian tertiary rehabilitation hospitals. We aimed to understand the perspectives of hospital administrators on the challenges experienced when implementing fall prevention policies/procedures for patients ...
H. Singh, B. C. Craven, H. M. Flett, C. Kerry, S. B. Jaglal, M. P. Silver, K. E. Musselman   +6 more
doaj   +1 more source

Are we missing the sitting? Agreement between accelerometer non-wear time validation methods used with older adults’ data

Cogent Medicine, 2017
We used Bland Altman plots to compare agreement between a self-report diary and five different non-wear time algorithms [an algorithm that uses ≥60 min of consecutive zeroes (Troiano) and four variations of an algorithm that uses ≥90 min of consecutive ...
Anna M. Chudyk, Megan M. McAllister, Hiu Kan Cheung, Heather A. McKay, Maureen C. Ashe   +4 more
doaj   +1 more source

Measuring mobility [PDF]

Quantitative Economics, 2018
Our new approach to mobility measurement involves separating out the valuation of positions in terms of individual status (using income, social rank, or other criteria) from the issue of movement between positions. The quantification of movement is addressed using a general concept of distance between positions and a parsimonious set of axioms that ...
Cowell, Frank A., Flachaire, Emmanuel
openaire   +6 more sources

A Variable-speed Control Method to Reduce Ducted-fan Thrust Fluctuations for Flying Car Utilization [PDF]

Journal of Applied Fluid Mechanics
Flying cars, or vertical takeoff and landing (VTOL) aircraft, are revolutionary devices that can address traffic congestion and help build a three-dimensional transportation system in the future.
Y. W. Luo, Yuhang He, Y. P. Qian, Y. J. Zhang   +3 more
doaj   +1 more source

Current Commutation in a Switched Lithium‐Ion Cell used in Cascaded Half‐Bridge Multilevel Inverters

IET Power Electronics, 2021
In order to improve the efficiency of battery electric vehicles, the utilization of reconfigurable batteries and multilevel inverters based on low‐voltage Si MOSFETs gains growing attention. Focusing on the half‐bridge as basic switching unit, this paper
Christian Hanzl, Christoph Hartmann, Markus Hölzle, Bernhard Liebhart, Michael Schmid, Christian Endisch   +5 more
doaj   +1 more source

Accurate Remaining Available Energy Estimation of LiFePO₄ Battery in Dynamic Frequency Regulation for EVs with Thermal-Electric-Hysteresis Model

Energies, 2023
Renewable energy power generation systems such as photovoltaic and wind power have characteristics of intermittency and volatility, which can cause disturbances to the grid frequency.
Zhihang Zhang, Languang Lu, Yalun Li, Hewu Wang, Minggao Ouyang   +4 more
doaj   +1 more source

UE Power Saving With Traffic Classification and UE Assistance

IEEE Access, 2023
A mobile device - or user equipment (UE) - using 5G can be configured to operate with large bandwidths and a large number of MIMO layers to enable high-throughput applications. This, however, comes at the cost of high power consumption.
Anum Ali, Yuqiang Heng, Vutha Va, Priyabrata Parida, Boon Loong Ng, Jianzhong Charlie Zhang   +5 more
doaj   +1 more source