scholarly journals A CYCLIC-TIME MODEL FOR ECLIPSE PREDICTION IN MESOAMERICA AND THE STRUCTURE OF THE ECLIPSE TABLE IN THE DRESDEN CODEX – CORRIGENDUM

2018 ◽  
Vol 29 (1) ◽  
pp. 245-246
Keyword(s):  
2017 ◽  
Vol 28 (2) ◽  
pp. 507-541 ◽  
Author(s):  
John Justeson

AbstractThis study describes, illustrates, and applies an “eclipse family” representation for the cyclic timing of eclipses in Mesoamerica. This theoretical construct is based on daykeepers’ approach to divination, anchored in the divinatory calendar (DC); empirically, it emerges from data on the timing of eclipses in Lowland Mayan1territory between 100b.c.e.and 1500c.e.drawn from Espenak and Meuss's (2007, 2009) eclipse canons.An eclipse family consists of a sequence of stations on which an eclipse might be visible in Mesoamerica – one every 88 new or full moons for 170 to 200 years, restricted to one of three DC zones. Cyclic and linear time relationships among dates of eclipses follow from this representation: intervals between successive stations in concurrent families in the same zone, and between successive stations across zones; between successive families in a zone; and among the first or last stations of families, within and across zones.One and only one eclipse-family representation fits the lunar stations of the Dresden Codex; its properties show that it is a solar eclipse table. In real time, the table pertains to a 405-month interval sometime between 1076 and 1148c.e., most likely from April 19, 1083c.e.to January 16, 1116c.e.


2014 ◽  
Author(s):  
Gabriel Tillman ◽  
Don van Ravenzwaaij ◽  
Scott Brown ◽  
Titia Benders

2009 ◽  
Vol 74 (10) ◽  
pp. 1489-1501 ◽  
Author(s):  
Marina Zelić ◽  
Milivoj Lovrić

Isopotential points in square-wave voltammetry are described for the first time. Model calculations and real measurements (performed with UO22+ and Eu3+ in perchlorate and bromide solutions, respectively) indicate that such an intersection could be observed when backward components of the net response, resulting from an increase in frequency or reactant concentration, are presented together. The electrode reaction should be fully reversible because quasireversible or slower electron transfer processes give the isopoints only at increasing reactant concentrations but not at increasing square-wave frequencies. The effect could be used as an additional diagnostic criterion for recognition of reversible electrode reactions where products remain dissolved in the electrolyte solution.


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