Results 71 to 80 of about 1,721,014 (269)

Africa 1:62,500, Gold Coast.

open access: yes, 1923
Various editions. Relief shown by contours and spot heights.; "Compiled, drawn and reproduced by the Gold Coast Survey Dept."--Some sheets.; Includes various issues of sheets. Some sheets 1st ed.
Gold Coast. Survey Department.
core  

Advances in Sustainable and Wearable Textile Based Soft Robotics

open access: yesAdvanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas   +6 more
wiley   +1 more source

Native American Studies Program APR Self Study

open access: yes, 2014
Native American Studies Program Academic Program Review Self Study ReportNative American Studies Program Academic Program Review Self Study ReportNative American Studies ...
Native American Studies Program Academic Program Review Self Study Report, APR Self Study Report
core  

Monolithic Oxidation Enables Ultrathin Vertically Graded Tantalum Oxide for Low‐Voltage, Low‐Variability Memristive Switching

open access: yesAdvanced Functional Materials, EarlyView.
Monolithic UV‐ozone oxidation of Ta forms an ultrathin Ta2O5/TaOx bilayer enabling resistive switching with a vertical defect gradient. A stoichiometric surface layer over an oxygen‐deficient sublayer promotes localized filament nucleation near the top interface, enabling low‐voltage operation, and reduced cycle‐to‐cycle variability.
Seunghoon Yang   +11 more
wiley   +1 more source

Nano-Gold and Film-Globular Nanostructures in Samples of Native Gold Deposit Pioneer (Amur Region, Russia)

open access: yesGeoresursy
The study of native gold from several ore zones of the Pioneer field (Amur). In the samples found: nano-gold of various morphology, varying size and composition, as well as complex micro- and nanostructures (film, film layered rhythmic, globular, fine ...
P. P. Safronov   +2 more
doaj   +1 more source

Electrostatic Superlattices Beyond 1:1 Stoichiometry

open access: yesAdvanced Functional Materials, EarlyView.
Polymer‐mediated charge regulation drives two hierarchical routes to higher‐stoichiometry nanoparticle superlattices. Tuning the polymer's molecular weight promotes progressive interstitial filling, transforming ZnS into the fully occupied CaF2${\rm CaF}_2$ lattice. Exchanging polymer assignment between large and small nanoparticles instead breaks CsCl
Binay P. Nayak   +7 more
wiley   +1 more source

Preferential Interfacial Engineering of Hydrogels via Interdigitated Nanoparticle Assembly

open access: yesAdvanced Functional Materials, EarlyView.
Robust surface functionalization of hydrogel surfaces is performed via interdigitated metal nanoparticle assembly, inducing strong affinity with the hydrogel matrix. The partially exposed nanoparticle domains act as interfacial nanobridges that mediate both chemical and physical bonding with diverse materials, including small molecules, fluorous ...
Hyeonjin Kim   +11 more
wiley   +1 more source

Characteristics of native gold at Kosumnerskoe placer gold deposit (the Nether-Polar Urals)

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2018
The paper presents the results of a study of heavy mineral concentrates of Kosumnerskoe gold deposit as well as the native gold from them. This gold deposit includes two gravel deposits.
M. A. Boguslavskiy, S. O. Khudyakov
doaj   +1 more source

2D Skeletal Muscle Thin Film Actuators Enhance Efficiency of Biohybrid Robots

open access: yesAdvanced Functional Materials, EarlyView.
2D skeletal muscle thin film actuators generate millinewton‐scale forces and millimeter‐scale strokes while remaining functional for over 30 days. Their force density is 20‐fold higher than 3D skeletal muscle actuators, enabling multi‐fin robots with tunable speed and multidirectional steering.
Maheera Bawa   +5 more
wiley   +1 more source

GOLD-SULFIDE MINERALIZATION OF QUARTZ VEINS IN GRANITES OF THE SOUTH SUKHTELYA GOLD OCCURRENCE (SOUTH URALS) [PDF]

open access: yesМинералогия
The paper considers mineralogical and geochemical features of gold-sulfide mineralization of quartz veins in granites of the Katsbakh complex in the South Sukhtelya gold occurrence (South Urals). The sulfide content of quartz veins varies from 1 to 3 vol.
S.I. Bryukhov   +4 more
doaj   +1 more source

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