Results 31 to 40 of about 45,698 (227)
Breaking Instance-Independent Symmetries In Exact Graph Coloring
, 2011 Code optimization and high level synthesis can be posed as constraint satisfaction and optimization problems, such as graph coloring used in register allocation. Graph coloring is also used to model more traditional CSPs relevant to AI, such as planning,
Aloul, F. A. +3 more
core +1 more source
Jarosite versus Soluble Iron-Sulfate Formation and Their Role in Acid Mine Drainage Formation at the Pan de Azúcar Mine Tailings (Zn-Pb-Ag), NW Argentina [PDF]
, 2014 Secondary jarosite and water-soluble iron-sulfate minerals control the composition of acid mine waters formed by the oxidation of sulfide in tailings impoundments at the (Zn-Pb-Ag) Pan de Azúcar mine located in the Pozuelos Lagoon Basin (semi-arid ...
Alicia Kirschbaum +5 more
core +3 more sources
Geological Journal, EarlyView.Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley +1 more source
Antimony Extraction from Galena Concentrates
Materials Proceedings, 2022 The extraction of antimony and arsenic from galena concentrates by leaching with strongly alkaline sodium sulphide solution are investigated. The effects of leaching parameters including sodium sulphide and sodium hydroxide concentrations in the leaching
Rafaella Aikaterini Megaloudi +5 more
doaj +1 more source
Comparative analysis of spring flood risk reduction measures in Alaska, United States and the Sakha Republic, Russia [PDF]
, 2017 Thesis (Ph.D.) University of Alaska Fairbanks, 2017River ice thaw and breakup are an annual springtime phenomena in the North. Depending on regional weather patterns and river morphology, breakups can result in catastrophic floods in exposed and ...
Kontar, Yekaterina Yevgenevna +1 more
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The Provenance of Silver in the Viking‐Age Hoard From Bedale, North Yorkshire
Archaeometry, EarlyView.ABSTRACT The acquisition of silver was a key motive propelling the Viking expansion out of Scandinavia; identifying the sources of Viking silver during the early part of the Viking Age can provide critical insights into the relative significance of western European and eastern, Islamic wealth in the Viking expansion.
Jane Kershaw +5 more
wiley +1 more source
Lead, zinc and copper mineralisation in basal Carboniferous sediments at Westwater, south Scotland [PDF]
, 1977 A zioneo f lead, zinc and copperm ineralisatioins developedo ver a minimum I of 4 km of strikeo f basal Carboniferoucse mentstoneg roup sedimentsa nd immediatelyu nderlyingB irrenswarkL avas atwestwater,n ear Laqholm in south Scotland.
Davies, A. +5 more
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A TEM investigation of optical variations in sphalerite. [PDF]
, 1987 Sphalerites from the Force Crag Pb-Zn vein, N England, show darker coloured zones found not only to be richer in Cu, Fe, Sb, Ag and Pb but also to contain precipitates of tetrahedrite-like composition.
Dickinson, C., Pattrick, R. A D
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Journal of the American Geriatrics Society, EarlyView.ABSTRACT Background The impact of vitamin D on fall incidence remains controversial. We studied the effect of 5 years of vitamin D3 supplementation on the risk of falls in a double‐blind, placebo‐controlled randomized trial with generally healthy, community‐dwelling men and women in Finland.
Toni Rikkonen +9 more
wiley +1 more source
Ferric chloride leaching of the Delta sulfide ores and gold extraction from the leaching residue [PDF]
, 1988 Conventional differential and bulk flotation processes have difficulties in achieving high recoveries with acceptable grades far zinc, lead and copper from the complex sulfide ores found at Tok, Alaska.
Lin, H.K., Rao, P.D.
core