Results 91 to 100 of about 1,949,196 (211)

Adjust setting time and early-age strength of ferrite-rich calcium sulfoaluminate cement through different chemical admixtures

open access: yesDevelopments in the Built Environment
To regulate the setting behavior and early-age strength of ferrite-rich calcium sulfoaluminate (CSA) cement, this study employed amino trimethylene phosphonic acid (ATMP) in combination with citric acid (CA) or sodium gluconate (SG). The effects of these
Guosheng Liao   +5 more
doaj   +1 more source

Modeling Recreational Amenities in an Urban Setting: Location, Congestion, and Substitution Effects [PDF]

open access: yes
In this article, we introduce a recreational amenity—a greenbelt park—into a simple urban economic model. For multiple possible park placements, we solve for the associated equilibrium urban structure, including the equilibrium rent gradient, city ...
Homans, Frances R.   +1 more
core   +1 more source

RURAL-URBAN DIFFERENCES IN NURSING HOME ACCESS, QUALITY AND COST [PDF]

open access: yes
Rural-urban differences in the supply of nursing home services as hypothesized to be jointly affected by competitive and regulatory forces, government policies, and the cost structure.
Bradford, Garnett L., Yu, Wei
core   +1 more source

Unions and the City: Negotiating Urban Change [PDF]

open access: yes, 2017
[Excerpt] Labor unions remain the largest membership-based organizations in major North American cities, even after years of decline. Labor continues to play a vital role in mobilizing urban residents, shaping urban conflict, and crafting the policies ...
McDonald, Ian Thomas
core   +1 more source

Inequality in Vietnamese Urban-Rural Living Standards, 1993-2006 [PDF]

open access: yes
Using data from five waves of the Vietnam Household Living Standard Survey, we find evidence of significant urban-rural expenditure inequality. Urban-rural inequality in Vietnam increased dramatically from 1993 to 1998, and peaked in 2002 before reducing
Booth, Alison L., Le, Huong Thu
core  

L.A. Story: Can a Parent Revolution Change Urban Education's Power Structure? [PDF]

open access: yes, 2006
In 1990 Steve Barr "rocked the vote" in America by helping to engineer an upswing in voting among 18 to 24 year olds with the help of musicians and other pop culture icons.
Joe Williams, Tom Mirga
core  

Characterizing water quality and hydrologic properties of urban streams in central Virginia [PDF]

open access: yes, 2019
The objective of this study was to characterize water quality and hydrologic properties of urban streams in the Richmond metropolitan area. Water quality data were analyzed for six urban sites and two non-urban sites.
Lucas, Rikki
core   +1 more source

Urban structure and growth [PDF]

open access: yes
Most economic activity occurs in cities. This creates a tension between local increasing returns, implied by the existence of cities, and aggregate constant returns, implied by balanced growth.
Esteban Rossi-Hansberg   +1 more
core  

Urban morphology and transformation the pattern of housing in the historical cities of Iran [PDF]

open access: yes, 2018
Regardless of the historical and cultural collapse of today's contemporary architecture that arose in the aftermath of the advent of modernity, if we look at the process of the emergence of architecture before this era, we see that most architectural ...
NAHAS FARMANIYEH, Farzaneh   +1 more
core  

The nested structure of urban business clusters [PDF]

open access: yes, 2019
Although the cluster theory literature is bountiful in economics and regional science, there is still a lack of understanding of how the geographical scales of analysis (neighbourhood, city, region) relate to one another and impact the observed ...
Arcaute, Elsa, Cottineau, Clémentine
core   +1 more source

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