Results 121 to 130 of about 284,044 (247)

Racial Economic Segregation across U.S. Public Schools, 1991–2022

open access: yesAERA Open
Despite its substantive importance as the strongest predictor of racial achievement gaps, racial economic segregation has been understudied in the previous literature on segregation.
Heewon Jang
doaj   +1 more source

Environnement urbain africain
et Maladie . Ségrégation antilépreuse et comportements adaptatifs à Bamako (Mali)

open access: yes, 1993
International audienceThe most important center for the segregation and health care of leprosy patients in West Africa is the Marchoux Institut in Bamako. It has encouraged the spontaneous development of a large neighborhood, Jikòrònin (Djikoroni).
Bargès, Anne
core   +1 more source

"Ghetto", "banishment", "neighborhood effects". A critique of the "ghetto" image of French housing projects [PDF]

open access: yes, 2011
URL : http://www.metropolitiques.eu/Ghetto-banishment-neighborhood.htmlInternational audienceAre residents of French housing projects really "banished" to their neighborhoods and kept in "confinement" there?
Gilbert, Pierre
core   +1 more source

Frontier Advances of Emerging High‐Entropy Anodes in Alkali Metal‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
Recent advances in microscopic morphology control of high‐entropy anode materials for alkali metal‐ion batteries. Abstract With the growing demand for sustainable energy, portable energy storage systems have become increasingly critical. Among them, the development of rechargeable batteries is primarily driven by breakthroughs in electrode materials ...
Liang Du   +14 more
wiley   +1 more source

Etude ab initio d'alliages AlCu : phénomènes de ségrégation et modification de la réactivité de surface vis-à-vis de O [PDF]

open access: yes, 2010
En présence d'éléments d'alliage, l'aluminium présente d'excellentes propriétés mécaniques, obtenues grâce à un durcissement structural (alliages Al/Cu/Mg). Ces alliages constituent ainsi des matériaux largement utilisés dans le domaine de l'aéronautique.
Benali, Anouar
core  

Bio‐Inspired Magnetically Tunable Structural Colors from Elliptical Self‐Assembled Block Copolymer Microparticles

open access: yesAdvanced Functional Materials, EarlyView.
Cephalopod‐inspired photonic microparticles with dynamic structural coloration are fabricated via confined self‐assembly of linear block copolymers into ellipsoids containing stacked lamellae. Embedded superparamagnetic nanoparticles enable rapid magnetic alignment, restoring vivid, angle‐dependent color.
Gianluca Mazzotta   +8 more
wiley   +1 more source

Réutilisation de coproduits coquilliers marins dans des bétons auto-plaçants pour des récifs artificiels [PDF]

open access: yes, 2014
National audienceDue to a need of reusing marine by-products (seashells) in the region of Lower Normandy, self-compacting concretes containing crushed shells replacing the natural aggregates are suitable for the manufacture of complex shaped modules ...
Boudart, Bertrand   +3 more
core   +2 more sources

Novel Functional Materials via 3D Printing by Vat Photopolymerization

open access: yesAdvanced Functional Materials, EarlyView.
This Perspective systematically analyzes strategies for incorporating functionalities into 3D‐printed materials via Vat Photopolymerization (VP). It explores the spectrum of achievable functionalities in recently reported novel materials—such as conductive, energy‐storing, biodegradable, stimuli‐responsive, self‐healing, shape‐memory, biomaterials, and
Sergey S. Nechausov   +3 more
wiley   +1 more source

(Dé)politisation d'une politique de peuplement : la rénovation urbaine du XIXe au XXIe siècle [PDF]

open access: yes, 2014
International audienceLa rénovation urbaine contemporaine présente de nombreuses analogies avec celle conduite à Paris et Lyon sous la direction des préfets Haussmann et Vaïsse au milieu du XIXe siècle, ainsi qu’avec celle mise en œuvre à l’échelle ...
Epstein, Renaud
core   +1 more source

Prenucleation Species Dictate Foreign Ion Incorporation in the Biomineral Precursor Amorphous Calcium Carbonate

open access: yesAdvanced Functional Materials, EarlyView.
ACC forms via aggregating prenucleation clusters that gatekeep its chemical composition. Ion identity steers the path: Ba and Sr substitute Ca in clusters, thereby inhibiting nucleation, with a dose‐dependent switch of Sr to induction. Mg partitions into Mg‐rich and Mg‐poor clusters; the latter form ACC, expelling Mg.
Qianyu Zhao   +9 more
wiley   +1 more source

Home - About - Disclaimer - Privacy