Predicting ordinal outcomes can inform important decisions, e.g., in medicine or education. Two methodological streams tackle prediction of ordinal outcomes: Traditional parametric models, e.g., the proportional odds model (POM), and machine learning-based tree ensemble (TE) methods. A promising ...
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Source: Bloomberg, Thomson Reuters GFMS, World Gold Council 2007 2008 2009 Gold price (RUB/oz) 50,000 40,000 30,000 20,000 10,000 2010 2011 0 24 Alluvial gold is gold found (usually in the form of fine grains or small nuggets) mixed with sand and gravel of rivers, streams and lake...
We here investigated how gold mining activities affect the structure of fish assemblages in small forest streams in French Guiana. We selected six streams subjected to different types of gold mining impact (reference, former gold mining and currently exploited sites) to measure the impact of gold ...
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About nine million Artisanal and Small-scale Gold Mining (ASGM) workers in Africa and people living near ASGM activities are highly exposed to geogenic and
Material and morphological features of native gold from placers of the Levy Dzhanku and Granitny streams (Khabarovsk Krai)Milana PavlovaMikita Charvonik
gold extraction and processing technologies have evolved. During the Roman Empire period, Emperor Augustus made significant advancements in hydraulic gold mining. He developed the “ground sluicing” method, which used water to wash away the overlying soil and expose the bedrock where gold deposits wer...
The stream drains near Jhara Gogwa of Sonakhani Village, north of Deogarh District in Odisha, and traverses the typical, sheared amphibolite-quartzite-minor metabasalt and quartz-sericite schist assemblage. Incidences have also been reported from the first-order and second-order streams around Ch...
TheU.S. Global GO GOLD and Precious Metal Miners ETF(GOAU, $19.40) is another tight portfolio, holding fewer than 30 companies engaged in the production of gold or other precious metals, whether actively (say, mining) or passively (owning royalties or production streams). ...