Results 71 to 80 of about 2,513,496 (355)

Challenges and opportunities during the COVID-19 pandemic: A layered vulnerabilities perspective

SSM: Qualitative Research in Health
The COVID-19 pandemic has had wide-ranging implications on the academic community and there have been numerous commentaries on the effects of the pandemic on qualitative health research.
Louise Meijering, Tess Osborne, Thomas A. Lowe, Zeinab Sattari N, Billie de Haas, Lisa Schreuder, Gerd Weitkamp, Els Maeckelberghe   +7 more
doaj   +1 more source

Correlation of COVID-19 Mortality with Clinical Parameters in an Urban and Suburban Nursing Home Population [PDF]

, 2020
Richard Shelton Kirby, John A. Kirby
openalex   +1 more source

Chip‐Scale Graphene/IGZO Cold Source FET Array Enabling Sub‐60 mV dec−1 Super‐Steep Subthreshold Swing

Advanced Materials, EarlyView.
Super‐steep subthreshold swing (SS) below 60 mV dec−1 is demonstrated in graphene/IGZO cold source transistor arrays. Linear density of states with Dirac cone in graphene suppressed the Boltzmann thermal tail, while high‐k HfO2 dielectric having small body factor enhanced gating efficiency, hereby further reducing SS. An average SS of ≈46.4 mV dec−1 is
Seyoung Oh, Ojun Kwon, Jongwon Yoon, Eunjeong Cho, Min Jeong Kim, Wondeok Seo, Minhee Kim, Shinhoi Kim, Yeongeun Kwon, Yung Joon Jung, Kyungrok Kang, Woojin Park, Yonghun Kim, Byungjin Cho   +13 more
wiley   +1 more source

Urban growth and population densities [PDF]

Demography, 1973
Abstract Differences in the distribution of population within and across metropolitan areas are seen as a product of the development of the metropolis during different transportation epochs. Age cohorts of census tracts in Cleveland, Ohio, may be split into three groups of development patterns based on the time of their early development:
openaire   +2 more sources

Effects of COVID-19 on Urban Population Flow in China [PDF]

, 2021
Xiaorong Jiang, Wei Wei, Shenglan Wang, Tao Zhang, Chengpeng Lu   +4 more
openalex   +1 more source

Energy Consumption Optimization in Trajectory Planning for Fuel Cell Hybrid Uavs Based On HMPC

Advanced Robotics Research, EarlyView.
The endurance limitation of multirotor drones is a critical challenge. This study adopts a hybrid power system of fuel cells and lithium‐ion batteries. Using Nondominated Sorting Genetic Algorithm II, it integrates trajectory planning with energy management optimization.
Xindi Wang, Jianyang Dong, Yongming Yao, Kaijin Hu, Jianxiong Cui, Yikai Luo, Jiawen Zhang, Shichao Niu   +7 more
wiley   +1 more source

Long‐Term Elevated CO2 Improves Soil Health and Rice Yields in Paddy Fields

Advanced Science, EarlyView.
Combining the two longest‐running rice free‐air CO2 enrichment experiments with a global data synthesis, this study demonstrates that long‐term elevated CO2 consistently enhances soil health. In rice paddies, this improvement sustains the CO2 fertilization effect over decades.
Fan Jiang, Wenchao Du, Kees Jan van Groenigen, Josep Peñuelas, Scott X. Chang, Lian Song, Chuang Cai, Yu Wang, Lin Deng, Zhengkun Hu, Weishou Shen, Qicong Wu, Haiyang Yu, Ying Yin, Fuxun Ai, Wei Zhou, Dongming Wang, Jianqiang Sun, Xiaoyuan Yan, Renfang Shen, Jiabao Zhang, Hongyan Guo, Chunwu Zhu   +22 more
wiley   +1 more source

Moderation of social participation in the relationship between disaster exposure and depression among older adults: evidence from LASI Survey, 2017–18

Discover Public Health
Background The two phenomena colliding in this twenty-first century are population ageing and climate change. Moreover, the surge in disaster recurrence, either natural or artificial, poses a challenge to older adults and will further aggravate their ...
Sumit Narayan Dwivedi, R. S. Reshmi, Samrat Sarkar   +2 more
doaj   +1 more source

CHANGES IN THE DYNAMICS AND DEMOGRAPHIC STRUCTURES OF THE ROMANIAN URBAN POPULATION. AN OVERVIEW OF THE POST-COMMUNIST PERIOD [PDF]

Revue Roumaine de Géographie, 2014
In the present period Romania’s urban system is undergoing a process of restructuring, the urban phenomenon acquiring new dimensions and characteristics.
BIANCA MITRICĂ
doaj  

Variations in urban population structure [PDF]

Demography, 1964
Hasta ahara no se ha prestado atencion suficiente, en materia de investigacion, al estudio sistematico y cuantitativo de la persisiencia y las variaciones en el tiempo de las caracteristicas espaciales de la distribucion y composicion de la poblacion. Utilizando datos de distritos censales para 1940 y 1960 en dos ciudades (Seatle y Rochester), el autor
openaire   +1 more source