Results 51 to 60 of about 686,954 (303)

Gradients in urban material composition: A new concept to map cities with spaceborne imaging spectroscopy data [PDF]

open access: yes, 2019
To understand processes in urban environments, such as urban energy fluxes or surface temperature patterns, it is important to map urban surface materials. Airborne imaging spectroscopy data have been successfully used to identify urban surface materials
Feilhauer, Hannes   +3 more
core   +2 more sources

Efficiency wages, involuntary unemployment and urban spatial structure [PDF]

open access: yesRegional Science and Urban Economics, 1995
A labor market model is developed within an urban spatial context, where it is shown that efficiency-wage policies can lead to significant levels of involuntary unemployment. Commuting cost differences between workers and nonworkers tend to increase unemployment, and competition for land tends to segregate workers and nonworkers, with nonworkers ...
ZENOU, Yves, SMITH, Tony E.
openaire   +2 more sources

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

open access: yesAdvanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai   +6 more
wiley   +1 more source

City rats: From rat behaviour to human spatial cognition in urban environments [PDF]

open access: yes, 2010
The structure and shape of an urban environment influence our ability to find our way about in the city^1-2^. Indeed, urban designers who face the challenge of planning environments that facilitate wayfinding^3^, have a consequent need to understand the ...
David Eilam   +2 more
core   +1 more source

Centrality Measures in Spatial Networks of Urban Streets

open access: yes, 2005
We study centrality in urban street patterns of different world cities represented as networks in geographical space. The results indicate that a spatial analysis based on a set of four centrality indices allows an extended visualization and ...
A. Bavelas   +9 more
core   +2 more sources

Congestion Tolling and Urban Spatial Structure [PDF]

open access: yesJournal of Regional Science, 1998
According to the standard model of urban traffic congestion and urbanspatial structure, congestion tolling results in a more concentrated city. In recent years, a new model of rush‐hour urban auto congestion has been developed that incorporates trip‐timing decisions—the bottleneck model.
openaire   +1 more source

Engineering Relative Spatial Structure of Dual Atomic Sites with Asymmetric Coordination for High‐Performance Hydrogen Evolution Activity

open access: yesAdvanced Functional Materials, EarlyView.
Dual‐atom catalysts featuring varying spatial configurations of metal sites (Pt1Fe1 DACs) are employed to systematically investigate the influence of spatial arrangements on the electronic structure and catalytic activity of active sites. Notably, the 3D asymmetric Pt1Fe1‐TAC dimer, featuring strong interatomic interactions, demonstrates superior ...
Yi Guan   +8 more
wiley   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

open access: yesAdvanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

Cities as emergent models: the morphological logic of Manhattan and Barcelona [PDF]

open access: yes, 2009
This paper is set to unveil several particulars about the logic embedded in the diachronic model of city growth and the rules which govern the emergence of urban spaces.
Al Sayed, K., Hanna, S., Turner, A.
core  

Exploring Employment Spatial Structure Based on Mobile Phone Signaling Data: The Case of Shenzhen, China

open access: yesLand, 2022
Debate on the shift from a monocentric to polycentric urban structure has been extensive. Polycentricity generally refers to the co-existence of several centers in a city.
Yani Lai   +3 more
doaj   +1 more source

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