Results 1 to 10 of about 38,724 (168)

On the Consistency between a Classical Definition of the Geoid-to-Quasigeoid Separation and Helmert Orthometric Heights

open access: yesSensors, 2023
It is acknowledged that a classical definition of the geoid-to-quasigeoid separation as a function of the simple planar Bouguer gravity anomaly is compatible with Helmert’s definition of orthometric heights.
Robert Tenzer, Albertini Nsiah Ababio
doaj   +1 more source

Applicability of Gravity Separation to Recycling Biodegradable Plastics

open access: yesJournal of Chemical Engineering of Japan, 2023
Biodegradable plastics should be appropriately managed independently of general plastics during and after use. To establish an effective recycling process for biodegradable plastics, the present study investigates and evaluates the applicability of ...
Yuki Tsunazawa   +5 more
doaj   +1 more source

Changes in physical properties of natural pesticides formulated from liquid smoke during storage [PDF]

open access: yesE3S Web of Conferences, 2023
Natural pesticides are commonly used active ingredients that are naturally non-chemical synthetic. The present work was to evaluate the changes in the quality of natural biopesticides formulated from rice husk liquid smoke during storage for 6 months ...
Hernani, Yuliani Sri
doaj   +1 more source

Variables Separation in Gravity [PDF]

open access: yesProceedings of Fourth International Winter Conference on Mathematical Methods in Physics — PoS(WC2004), 2004
8 pages. In proceedings of 4th International Winter Conference on Mathematical Methods in Physics (WC 2004), Rio de Janeiro, Brazil, 9-13 Aug ...
Obukhov, Valery V.   +1 more
openaire   +2 more sources

Weak gravity versus scale separation

open access: yesJournal of High Energy Physics, 2022
We give evidence that fully supersymmetric Anti-de Sitter vacua of extended supergravity with a residual gauge group containing an abelian factor cannot be scale separated as a consequence of the weak gravity conjecture. We prove this for N = 2 and N = 8
Niccolò Cribiori   +1 more
doaj   +1 more source

Recovery of Rare Earth Elements Minerals from Iron-Oxide-Silicate-Rich Tailings: Research Review

open access: yesEng, 2022
The rapid depletion of high-grade rare earth elements (REE) resources implies that future supplies may be augmented with low-grade ores, tailings, and other unconventional resources to meet cut-off grades and, subsequently, supply demands.
George Blankson Abaka-Wood   +3 more
doaj   +1 more source

Analytical Study on Gas-Oil Separation of a Heat Pump System under Lunar Gravity

open access: yesAdvances in Mechanical Engineering, 2020
A heat pump in the aerospace industry can significantly reduce the area of radiator by elevating the rejection temperature. Especially for a Lunar base, the heat pump can improve the heat rejection capability of the thermal control system to adapt the ...
Zhendong Fu   +3 more
doaj   +1 more source

Comprehensive Utilization Research and Application of a Foreign Nickel-Cobalt Ore

open access: yesKuangchan zonghe liyong, 2023
Aiming at a foreign nickel-cobalt ore resource, based on the identification of the nature of the ore, the process flow of “raw ore scrubbing-cyclone classification-spiral roughing-shaking table selection-magnetic separation and iron removal” is adopted ...
Aihui Sun, Jianjian Zou
doaj   +1 more source

Experimental Research on Nelson Gravity Separation from a Gold Mine Flotation Tailings in Subei

open access: yesKuangchan zonghe liyong, 2022
A gold mine in Subei adopts flotation process to treat ores. Recently, due to the large change of the ore properties, the size of the gold inlay becomes thicker, resulting in gold entering tailings.
Kun Liu, Tingxia Wang, Jianmin Li
doaj   +1 more source

Reverse hybrid jig separation efficiency estimation of floating plastics using apparent specific gravity and concentration criterion

open access: yesFrontiers in Chemistry, 2022
We developed a technique called the reverse hybrid jig, an advanced physical separation technique that combines the principles of jig and flotation to separate floating plastics.
Theerayut Phengsaart   +9 more
doaj   +1 more source

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