Results 101 to 110 of about 17,242,506 (354)

Variations in urban population structure [PDF]

open access: yesDemography, 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

A U‐shaped Microfluidic Platform for Culturing Vascularized Colorectal Cancer Spheroids Reveals Tumor–Endothelial Crosstalk and Invasion‐Associated Remodeling

open access: yesAdvanced Materials Technologies, EarlyView.
A closed U‐shaped microfluidic platform symmetrically embeds a single, size‐controlled HT29 colorectal cancer spheroid within a GFP‐HUVEC‐laden fibrin matrix. HT29 spheroids are associated with hyper‐branched endothelial network remodeling, while vascularized co‐culture is accompanied by anisotropic protrusive growth and EMT‐like marker changes in the ...
G. Cretti   +4 more
wiley   +1 more source

Unravelling the relation between well-being and mobility in later life: an ecological momentary assessment approach

open access: yesWellbeing, Space and Society
Mobility in later life is important for maintaining independence, autonomy, self-reliance and social engagement. Although reduced mobility and engagement in everyday activities are often associated with lower well-being, this relationship is not ...
Louise Meijering   +4 more
doaj   +1 more source

Disasters and the Health of Urban Populations [PDF]

open access: yesJournal of Urban Health: Bulletin of the New York Academy of Medicine, 2005
The average number of reported disasters worldwide, based on International Federation of the Red Cross criteria, increased from an average of 428 per year between 1994 and 1998 to 707 per year between 1999 and 2003.1 Although definitions of disasters vary, most definitions concur that disasters may be attributed to natural, technological, or human ...
openaire   +3 more sources

From Lab to Landscape: Environmental Biohybrid Robotics for Ecological Futures

open access: yesAdvanced Robotics Research, EarlyView.
This Perspective explores environmental biohybrid robotics, integrating living tissues, microorganisms, and insects for operation in real‐world ecosystems. It traces the leap from laboratory experiments to forests, wetlands, and urban environments and discusses key challenges, development pathways, and opportunities for ecological monitoring and ...
Miriam Filippi
wiley   +1 more source

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

open access: yesSSM: 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   +7 more
doaj   +1 more source

Urban population estimation based on residential buildings volume using IKONOS-2 images and lidar data

open access: yes, 2016
This paper presents a methodological approach to estimation of urban population using the volume of single houses and high-rise residential buildings obtained from an IKONOS-2 ortho-image and light detection and raging (lidar) data.
L. Tomás   +4 more
semanticscholar   +1 more source

Classical models of urban population density. The case of Barcelona Metropolitan Area [PDF]

open access: yes
In this paper, we study the classical functional forms density-distance and its relation with the suburbanization for the Barcelona Metropolitan Area.
Jordi Suriñach-Caralt   +1 more
core  

China's Low‐Carbon Energy Transition Over the Past Two Decades: Experiences and Implications

open access: yesAdvanced Science, EarlyView.
China's low‐carbon energy transition features a brief decline and subsequent rebound in coal consumption, alongside the rapid expansion of renewable energy. This study develops a stage‐based analytical framework to explain this evolution from the perspectives of economic development, energy security, and environmental sustainability, revealing how ...
Yu Liu   +3 more
wiley   +1 more source

Urban growth and population densities [PDF]

open access: yesDemography, 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

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