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91.
Peter Robertshaw Marilee Wood Erik Melchiorre Rachel S. Popelka-Filcoff Michael D. Glascock 《Journal of archaeological science》2010
Three-hundred-and-sixty glass beads from 19 archaeological sites in southern Africa dating between about the 8th and 16th centuries AD were analyzed using LA-ICP-MS, determining 47 chemical elements. The eight different bead series, previously defined on morphological characteristics, possess different glass chemistries. Some bead series were made from plant-ash glasses, others from soda-alumina glasses. Zhizo series beads of the late 1st millennium AD were probably made from Iranian glass. Later bead series were made of glass probably manufactured in South Asia, though there are changes through time in both South Asian glass recipes and bead morphologies. 相似文献
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Erik Dietzenbacher 《Journal of regional science》2006,46(4):773-786
ABSTRACT It is well known that multiplier estimates within an interindustry context may be biased when the input coefficients are stochastic. Several conditions have been derived under which the estimates were shown to be biased, all with the same sign. In contrast to these analytical results, however, simulations using a stochastic transactions table unexpectedly reported the unbiasedness of multiplier estimates. This note argues that the sample sizes were too small. It is shown that for increased sample sizes the multiplier estimates are all positively and significantly biased, in line with the analytical results, but the biases are very small. 相似文献
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ABSTRACT The biproportional RAS technique has become one of the most important tools to update, regionalize, or balance input–output tables. In this note, we rigorously prove that the estimation of the intermediate transactions matrix yields the same results as the estimation of the input coefficients matrix or the output coefficients matrix. We also show that this does not hold for any of the other updating procedures that have been commonly proposed as an alternative to RAS. 相似文献
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Erik Nakjavani 《Iranian studies》2011,44(1):77-98
This article focuses on how Esmail Hkoi poetically inhabits the world of his poetry as an observer and visionary explorer. Its aim is to make manifest how he engages his readers in reciprocal poetic dialogues to communicate his unique vision of the lived world. The dialogic function of his poetry is then examined as the ground of emergence of an experiential poetic mode of knowledge of the human condition. The article also considers Khoi's poetry as work done in the fields of language, alchemically transmuting everyday language of communication into poetic discourse. Finally, an analysis of his poem “To the Aged Mulberry Branch” explicates how Khoi can create a world of imagination whole and entire unto itself by his minimalist approach to poetry. 相似文献