We present a new methodology to derive faster composite operations of the form dP + Q, where d is a small integer ≥ 2, for generic ECC scalar multiplications over prime fields. In particular, we present an efficient Doubling-Addition (DA) operation that can be exploited to accelerate most scalar multiplication methods, including multiscalar variants. We also present a new precomputation scheme ...

Abstract This paper begins with an examination of the phrase /garah dmāna-/, most common designation for Paradise in Gathas, which traditional translation ‘House Song’ is upheld. Its dualistic opposite /drujah dmāna-/ Wrongness’ Hell leads to question why one doesn’t have expected *‘House Rightness’ instead Song’. The answer proceeds from etymologically unrelated Armenian gerezman ‘grave, tomb’...

In a parity judgment task, the ERPs at parietal electrode sites become more negative as more mental rotation has to be executed. This article provides a review of the empirical evidence regarding this amplitude modulation. More specifically, experiments are reported that validate both the functional relationship between mental rotation and the amplitude modulation as well as the temporal relati...

We investigated whether concurrent processing of a tone (T1) interferes with early sensory-perceptual processing of a visual target (T2) in variants of the psychological refractory period paradigm using the event-related potential (ERP) method and 70-channel electroencephalographic recordings. T1, which required a speeded response, was presented in all trials. In half of the trials, T1 was foll...

M. A. Van Selst, E. Ruthruff, and J. C. Johnston (1999) found that practice dramatically reduced dual-task interference in a Psychological Refractory Period (PRP) paradigm with 1 vocal response and 1 manual response. Results from 3 further experiments using the highly trained participants of M. A. Van Selst et al. (1999) support 4 main conclusions: (a) A processing bottleneck exists even after ...

The apparently deleterious effect of aging on dual-task performance is well established, but there is little agreement about the source of this effect. Studies of the psychological refractory period (PRP) indicate that young adults can flexibly control dual-task performance through task-coordination strategies. Thus, the performance of older adults might differ from young adults because older a...

Why is the human brain fundamentally limited when attempting to execute two tasks at the same time or in close succession? Two classical paradigms, psychological refractory period (PRP) and task switching, have independently approached this issue, making significant advances in our understanding of the architecture of cognition. Yet, there is an apparent contradiction between the conclusions de...

hellenism is a part of iran’s historical period. this era starts with the devastating onslaught of alexander, the macedonian warlord. our historical sources introduce alexander with a collection of mythic-historical features which make us visualize the real alexander with an ambiguous image. the conflicting viewpoints of eastern and western historical works in pre-islamic periods can be the rea...

The directors of the Iranian-Italian archaeological Expedition in Khuzistan, south-west Iran present first results a survey conducted plain Izeh, one core sectors ancient Parthian vassal kingdom Elymais. Izeh is situated east fertile lowlands at feet Bakhtiari mountains. From there many passes lead through mountain range. new adds data to exploration by H.T. Wright same region....