Although the forces behind the evolution of imperfect mimicry remain poorly studied, recent hypotheses suggest that relaxed selection on small-bodied individuals leads to imperfect mimicry. While evolutionary history undoubtedly affects the development of imperfect mimicry, ecological community context has largely been ignored and may be an important driver of imperfect mimicry. Here we investi...

We investigate the joint effect of channel estimation and frequency flat transmitter and receiver I/Q imbalance on an Orthogonal Frequency Division Multiplex (OFDM) system. We assume independent fading with identically and independently distributed (i.i.d) mirror carrier channel coefficients. Closed form expressions for symbol error rate and bit error rate of M-QAMmodulation are derived. We con...

It is widely known that our closest relatives, the great apes, which hold some of the potentially richest genetic insights into our own evolution, are under threat in their natural environments. But a new assessment of our only Asian cousin, the orangutan, by the Worldwide Fund for Nature suggests numbers have declined by 90 per cent over the past century and that extinction in the wild may occ...

This article presents a unified solution to two long-standing problems concerning successive cyclicity. First, under the minimalist program of Chomsky (1995), a trigger for successive-cyclic wh-movement to [–wh] SpecC positions must be identified. Second, as noted by den Besten & Webelhuth (1990), there is a strict prohibition against unbound intermediate traces that result from a combination o...

This paper presents a theoretical view of imperfect market. It concludes that an increase in the price of products does not give any incentive to increasing production which shows the mechanism for upward trends in prices.

IMPERFECT competition is a pervasive part of modern industrial economies, where high levels of concentration in product markets often coexist with unionised labour markets. Most standard macroeconomic models, however, assume that markets are perfectly competitive. This paper provides a simple framework in which we are able to explore some of the implications of imperfect competition for the mac...