The history of pre-Columbian metallurgy in South America is incomplete because looting of metal artifacts has been pervasive. Here, we reconstruct a millennium of metallurgical activity in southern Bolivia using the stratigraphy of metals associated with smelting (Pb, Sb, Bi, Ag, Sn) from lake sediments deposited near the major silver deposit of Cerro Rico de Potosí. Pronounced metal enrichment...

exchange-coupled Fe/CoPt systems H. Oguchi, A. Zambano, M. Yu, J. Hattrick-Simpers, D. Banerjee, Y. Liu, Z. L. Wang, J. P. Liu, S. E. Lofland, D. Josell, and I. Takeuchi Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA Advanced Materials Research Institute, University of New Orleans, Louisiana 70148, USA School of Materials Science and E...

To date, information concerning pre-Colonial metallurgy in South America has largely been limited to the archaeological record of artifacts. Here, we reconstruct a millennium of smelting activity in the Peruvian Andes using the lake-sediment stratigraphy of atmospherically derived metals (Pb, Zn, Cu, Ag, Sb, Bi, and Ti) and lead isotopic ratios (206Pb/ 207Pb) associated with smelting from the M...

malaria is the second most frequent clinically suspected disease entity after acute respiratory tract infection in developing countries. active malarial transmission occurs throughout the year, while aggressive out bursts of disease are seen mainly during and after the 'monsoon' season. this study aimed to determine the morbidity and mortality associated with malaria during flood at isra univer...

background: in the process of cancer treatment, mothers of children with cancer experience burden of care as a result of these conditions. early detection of burden of care has an important role in promoting health care. the aim of this study was to evaluate burden of care in mothers of children with a malignancy. materials and methods: this cross sectional study was done on 70 mothers of child...

iran has had incremental incidence of traffic accident mortality since introduction of mechanization about a century ago. but the newest data from iran show decrease in the absolute number of deaths, death per 10,000 vehicles and death per 100, 000 populations. despite its huge impact on health and economy, research in the field of traffic crashes is still scant and there are still deficiencies...

B. Gajdzik, The Silesian University of Technology, Faculty of Materials Science and Metallurgy, Katowice, Poland K. Grzybowska, Poznan University of Technology, Faculty of Engineering Management, Poznan, Poland The article presents notions connected with resource structure of useful knowledge packages in metallurgical enterprise. Dependence between building competence of employees and using kno...

detail exactly how sparse medical care was in Scotland. Even if it were available, the authors show that the stringency of the Scottish Poor Law may have denied access to it. One of their tables (9.B) "shows how much was actually spent on doctors per head of the population on the poor roll. The Scottish average was £0.0 154, or no more than 3.d per pauper per year in the old money" (p. 217). Th...

The most widely used superconducting materials are based on Nb-Ti alloys with Ti contents ranging from 46-50 weight % Ti. These alloys of Nb and Ti have both high strength and ductility and can be processed to achieve high critical current densities that make them ideal candidates for magnet and applications. Nb-Ti based superconductors are commercially produced in long uniform lengths and cost...