Results 181 to 190 of about 5,496 (261)

The public agglomeration effect: Urban–rural divisions in government efficiency and political preferences

American Journal of Political Science, EarlyView.
Abstract Why and when do cities vote for the left? The emergence of the urban–rural divide in the United States in the 1930s is inconsistent with canonical theories of cleavages. This paper introduces an explanation: agglomeration effects. The provision of government services is more efficient in urban environments because of nonrivalries, economies of
Theo Serlin
wiley   +1 more source

Study on corrosion behavior and mechanical performance degradation prediction of bolts in high mineralized corrosion environment. [PDF]

Sci Rep
Zhang J, Li S, Du Z, Wang B, Wen Z.
europepmc   +1 more source

The economic foundations of powersharing: Evidence from Africa

American Journal of Political Science, EarlyView.
Abstract How—and with whom—do rulers share power? Existing research focuses on the strategic logic of powersharing. In this paper, we analyze its economic foundations. Powersharing is modeled as a subnational fiscal contract, in which rulers allocate political representation based on constituencies’ revenue potential. Empirically, we combine historical
Yannick I. Pengl, Philip Roessler
wiley   +1 more source

Seasons and vertical dynamics influence community composition in a flooded and abandoned mica mine. [PDF]

FEMS Microbiol Ecol
Lhoste E, Jaclin D, Ponsin V, Rosabal M, Sara Lazar C.   +4 more
europepmc   +1 more source

Making Mining Licit: Gold, Commodification, and the Everyday Performance of Law in Colombia

American Anthropologist, EarlyView.
ABSTRACT Ethnographies of resource‐making have shown that the extraction of resource value from objects is premised on obviating the emplaced lifeworlds that surrounded objects before they traveled to consumer markets. Much of this literature looks at such supply‐chain disentanglement from the viewpoint of corporate and formal regulatory practices ...
Jesse Jonkman
wiley   +1 more source

Comprehensive enhancement of blasting performance and dust suppression in open-pit mines using a modified mudstone-fly ash geopolymer stemming material. [PDF]

Sci Rep
Ding X, Wang Y, Shi Z, Jiang L, Liu X.
europepmc   +1 more source

The exploitation of silver deposits in early medieval Europe: some documentary, economic and social problems

Archaeometry, EarlyView.
Abstract Focusing on Southern Europe, this article sheds light on the mining landscape of the early Middle Ages. Based on the current state of historical and archaeological knowledge, the article raises a number of questions that can be extended to other European regions.
Nicolas Minvielle Larousse
wiley   +1 more source

Soil wetting and drying processes influence stone artefact distribution in clay‐rich soils: A case study from Middle Gidley Island in Murujuga, northwest Western Australia

Archaeometry, EarlyView.
Abstract Soils that contain swelling clay minerals (e.g., montmorillonite) expand and contract during wetting and drying, causing movement within the soil profile. This process, known as argilliturbation, can alter artefact distributions, destroy stratigraphy and complicate the interpretation of archaeological deposits.
Caroline Mather, Matthias Leopold, Kaitlin Sullivan, Kane Ditchfield, Tom Horrocks, Luke Gliganic, Emma Beckett, Diana Patalwala, Emielda Yusiharni, Michael Smirk, William Hiscock, Jo McDonald   +11 more
wiley   +1 more source

Polarimetric Time-Series InSAR for Surface Deformation Monitoring in Mining Area Using Dual-Polarization Data. [PDF]

Sensors (Basel)
Ju X, Gao S, Li Y.
europepmc   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

Archaeometry, EarlyView.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source