Results 81 to 90 of about 6,602 (296)

Fifth annual conference on Alaskan placer mining [PDF]

, 1983
An abridged format of papers, presentations and addresses given during the 1983 conference held on March 30-31, 1983 compiled and edited by Bruce W. Campbell, Jim Madonna, and M. Susan Husted.Partial funding was provided by the Carl G.
Campbell, B.W., Husted, S.M., Madonna, J.A.   +2 more
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On‐Demand Activation of Thin Alginate Shell Encapsulated Volatile Liquid for Untethered Pneumatic Soft Actuation

Advanced Engineering Materials, EarlyView.
Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan, Jack Keddie, Byoungyoul Park, Hyun‐Joong Chung   +3 more
wiley   +1 more source

Les gisements d'or des Andes sud-orientales du Pérou [PDF]

, 1988
Cet article illustre les différents types de gisements aurifères des Andes sud-orientales du Pérou. Les minéralisations primaires se répartissent soit dans des terrains pré-ordoviciens soit, plus fréquemment, dans les séries du Paléozoïque inférieur.
Delaune, Mireille, Fornari, Michel, Hérail, Gérard, Laubacher, Gérard   +3 more
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Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Multiscale (microscopic to remote sensing) preliminary exploration of auriferous-uraniferous marbles: A case study from the Egyptian Nubian Shield. [PDF]

Sci Rep, 2023
Shebl A, Hamdy M.
europepmc   +1 more source

Birch Hill Park: A Case Study of Interpretive Planning [PDF]

, 1979
The Fairbanks North Star Borough Parks and Recreation Department is responsible for the planning, acquisition, development, improvement, and maintenance of lands and facilities to meet the community's needs for park and open space lands in ...
Combs, David
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Dynamic Testing of Cold Gas Sprayed Bipolar Plates–Porous Transport Layer Coating System in Proton Exchange Membrane Water Electrolysis

Advanced Engineering Materials, EarlyView.
Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin, Marvin Erck, Kevin Jasutyn, Katja Radermacher, Andreas Bund, Mario Kurniawan   +5 more
wiley   +1 more source

THE FIRST FINDING OF NATIVE BISMUTH, WAYLANDITE AND BEYERITE IN ALLUVIAL GOLD PLACER DEPOSITS OF ANGARA REGION, YENISEI RIDGE [PDF]

Минералогия, 2017
The pebbles from alluvial gold placer deposits of the upper reaches of the Tatarka river in Angara region, Yenisei Ridge, are composed of bismuth minerals: crystal aggregates of native bismuth and pseudomorphic secondary oxides, carbonates, and ...
S.V. Pribavkin, P.S. Kozlov, S.V. Mazur, I.A. Gottman, D.A. Zamyatin, S.G. Sustavov   +5 more
doaj  

User-centered design of central venous access device documentation. [PDF]

JAMIA Open, 2022
Kandaswamy S, Gill A, Wood S, Mckay L, Hike J, Popkin M, Ray E, Maude H, Johnston C, White T, Orenstein E.   +10 more
europepmc   +1 more source

The Effects of Surface Disturbances on the Leaching of Heavy Metals [PDF]

, 1987
The harmful effects of heavy metal contamination of surface waters impacted by gold mining activity are well documented. An examination was conducted on the effects of surface disturbances in Wade Creek on the concentrations of heavy metals in ...
Brown, Edward J., Dixson, David P.
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