نتایج جستجو برای: bronze
تعداد نتایج: 4369 فیلتر نتایج به سال:
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Thermal expansion of Li0.9Mo6O17 is a-axis dominated which reduces the separation of the conducting chains at low temperature enhancing the interchain coupling. This destabilizes the Luttinger-liquid fixed point leading to an electronic charge- (or spin-) density wave dominated by Coulomb repulsion, as predicted by theories for Luttinger liquids.
Online social media offers an unprecedented laboratory to explore social interactions at scale. Yet it's hard to anticipate all the effects of a system with so many actors, and the systems we build are often re-appropriated by end users. To better understand how these systems are used, we employ mixed methods research to combine small-scale observations with large-scale data analysis. I'll prov...
Pumice fragments recovered from an archeological excavation on the Greek mainland have been correlated by means of index of refraction measurements with the Late Bronze Age volcanic eruption on the island of Thera (Santorini) in the Aegean Sea. Pottery from the strata containing the pumice dates from the 15th century B.C.
We introduced a novel method for the rapid synthesis of silver nanohexagonal thin columns from an aqueous mixture of sodium thiosulfate (Na2S2O3) and silver chloride (AgCl) simply added to a phosphor bronze substrate. The reaction is based on galvanic displacement and the products are potentially useful for plasmonic applications.
In this article we examine a variety of quantitative models for describing archaeological networks, with particular emphasis on the maritime networks of the Aegean Middle Bronze Age. In particular, we discriminate between those gravitational networks that are most likely (maximum entropy) and most efficient (best cost/benefit outcomes).
A new partial differential model for monitoring and detecting copper corrosionproducts (mainly brochantite and cuprite) is proposed to provide predictive tools suitable for describing the evolution of damage induced on bronze specimens by sulfur dioxide (SO2) pollution. This model is characterized by the movement of a double free boundary. Numerical simulations show a nice agreement with experi...
The differential diagnosis of the bony lesions known as porotic hyperostosis found on a Bronze Age child's skull is discussed. Keith and Shattock gave an opinion in 1923 that the cause was rickets. A firm conclusion is not reached in this paper, but it is suggested that it was more likely to have been an iron-deficiency anaemia.
The paper introduces an overview on the researches we are currently carrying out on the integration of semantic aspects in Geographical Information Systems. Through an overview on the activities in the context of a project concerning the study of Bronze Age settlements in northern Italy, the paper shows how issues concerning semantics and GIS are currently faced to define an innovative and inte...
A 268 cm section of sediment core from Liangzhi Lake in Hubei province in central China was used to assess the use and accumulation of metals in the lake in the past 7,000 years. The concentrations of trace metals, including Cu, Pb, Ni, and Zn, and major elements, Ca, Fe, and Mg, in a 14C- dated segment of sediment core were analyzed. Historical trends on the input of metals to Liangzhi Lake fr...
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