among the food products, grains play an important role in the consumption patterns of people, especially in the developing countries. since iran's main source of public dietary energy comes directly from grains, investigating and identifying the determinants of import of these products can be an important step towards food security. most experimental studies consider import of grains as only a ...

|This paper corrects a few results reported in 1]. It shows that, for very long data strings, the Mean Error-Free Interval as a function of the packet error rate P is not discontinuous. In addition, the corrected results are extended to point-to-multipoint environment. In 1], Georganas et al. derived expressions for the Mean-Error Free Interval (MEFI) in a data string of B packets in a packet-o...

The term ‘learning organisation’ is now a common feature of museum management discourse and, by implication, raises the issue of how a museum itself learns about approaches to ‘learning’. As ‘learning in museums’ becomes a major focus for many museums, clearly formulated and institutionally supported ideas about ‘learning’ should be an essential part of our role in interpreting natural and cult...

We study how the distribution of other-regarding preferences develops with age. Based on a set of allocation choices, we classify each of 717 subjects, aged 8 to 17 years, as either egalitarian, altruistic, or spiteful. We find a strong decrease in spitefulness with increasing age. Egalitarianism becomes less frequent, and altruism much more prominent, with age. Females are more frequently clas...

Procedures controlling error rates measuring at least k false rejections, instead of at least one, can potentially increase the ability of a procedure to detect false null hypotheses in situations where one seeks to control k or more false rejections having tolerated a few of them. The k-FWER, which is the probability of at least k false rejections and generalizes the usual familywise error rat...

We consider the problem of optimal quantization with norm exponent r > 0 for Borel probability measures on R under constrained Rényi-αentropy of the quantizers. If the bound on the entropy becomes large, then sharp asymptotics for the optimal quantization error are well-known in the special cases α = 0 (memory-constrained quantization) and α = 1 (Shannon-entropy-constrained quantization). In th...

In this paper, we propose a modification to the existing Data Encryption Standard (DES) to make it secure and prone to the bit errors caused by the wireless channel. We observe that using the modified algorithm in wireless channels, improves the bit error rate (BER) performance as well as security compared to DES. Wireless channels are an open medium to intruders and their attacks; encryption i...