Results 111 to 120 of about 514,274 (304)

Application of placer gold morphology to gold exploration

, 2017
Placer gold undoubtedly carries some of the features of endogenous gold. The physical and chemical characteristics of such gold are influenced by many factors: the nature of the primary gold, the water force, the morphology of the river bed, the length of transport and the chemical composition of the water in the river. In the Republic of Macedonia has
Stefanova, Violeta, Stojanova, Violeta, Sijakova-Ivanova, Tena   +2 more
openaire   +1 more source

Knowledge transfer inside the regional economic system: the case of eighty years of economic history of the Russian North-East [PDF]

Economic role of the knowledge transfer is studied on the example of the Russian North-East and its two basic branches that is exploration and mining which form the core of the regional economy (regional mining system).
Alexander Pelyasov, Igor Batsaev, Igor Golubenko, Nataliya Galtseva   +3 more
core  

Sound mining in the North : a guide to environmental regulation and best practices supporting social sustainability [PDF]

, 2014
Julkaistu ...
Hast, Sanna, Heikkinen, Hannu I., Hentilä, Helka-Liisa, Jokinen, Mikko, Kokko, Kai, Komu, Teresa, Kunnari, Marika, Lépy, Élise, Oksanen, Anniina, Soudunsaari, Leena, Suikkanen, Asko, Suopajärvi, Leena   +11 more
core  

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Learning to Predict the Wisdom of Crowds

, 2012
The problem of "approximating the crowd" is that of estimating the crowd's majority opinion by querying only a subset of it. Algorithms that approximate the crowd can intelligently stretch a limited budget for a crowdsourcing task.
Ertekin, Seyda, Hirsh, Haym, Rudin, Cynthia   +2 more
core   +1 more source

Development of Sustainable MgO–C Refractories Using MgO–C Recyclates and a Novel Eco‐Friendly Fructose–Tannin Binder Crosslinked With Citric Acid

Advanced Engineering Materials, EarlyView.
This study develops sustainable MgO–C refractories using recycled materials and eco‐friendly fructose–tannin binders. The enhanced performance of citric acid as a cross‐linker and functional additives on mechanical and thermomechanical properties was examined. Characterization included strength tests, immersion trials, and microstructural and inclusion
Dinesh K. Gunasekar, Jana Hubálková, Steffen Dudczig, Gert Schmidt, Florian Kerber, Thomas Schemmel, Patrick Gehre, Christos G. Aneziris   +7 more
wiley   +1 more source

TO THE PROSPECTING OF LODE GOLD DEPOSITS IN DIFFICULT MOUNTAIN-TAIGA LANDSCAPES: THE MIDDLE-ISHIMBINSK AREA OF YENISEI GOLD PROVINCE (KRASNOYARSK REGION)

RUDN Journal of Engineering Research, 2015
The paper is devoted to the new methods of prospecting of lode gold deposits in difficult mountain- taiga landscapes. Their efficiency and the preliminary results of exploration for the Sredne-Ishimbinskaya area in Yenisei gold province are discussed ...
R Kh Mansurov
doaj  

Geological characteristics of the Daduhe gold belt, western Sichuan, China: Implications for exploration

Open Geosciences
Geological characteristics, genetic model, and exploration implications in the Daduhe gold belt are studied. Three categories of gold deposits have been distinguished: “gold deposits in the basement (GDB),” “gold deposits in the cover layer (GDC),” and ...
Zhang Yize, Chen Zailin, Zhang Chengjiang, Ni Shijun, Cheng Xianfeng, Kexin Liu   +5 more
doaj   +1 more source

Metamorphic Fluids with Magmatic Overprint in the Huayagou Gold Deposit, West Qinling Orogen, Central China: Evidence from Apatite and Tourmaline In Situ Geochemistry

Geosciences
Recent exploration has demonstrated significant prospecting potential at the Huayagou Au deposit in Longnan mineral Field, Gansu Province, West Qinling Orogen, Central China. However, the nature and evolution of the auriferous fluids responsible for gold
Fei Teng, Jiangwei Zhang, Wendi Guo, Leon Bagas, Kang Yan, Yuxiang Teng, Ying Wei, Ningchao Zhou, Yongbao Gao, Liyong Wei   +9 more
doaj   +1 more source

Precolonial commerce in Northeastern Sierra Leone [PDF]

, 1979
African Studies Center Working Paper No. 10The area of northeastern Sierra Leone has been inadequately lumped into more general systems of commerce in Upper Guinea or the Sierra Leone hinterland in the precolonial period.
Fyle, C. Magbaily
core