Adaptive advantages of the compound leaf form in flowering plants have so far remained elusive. A novel idea—proposed here—is that there are no direct advan-tages; the compound leaf evolved instead as a trade-off of selection in favour of something else: greater leafing intensity. Producing more

Latitudinal variation in the asynchrony of seasons: implications for higher rates of population differentiation and speciation in the tropics

Fishing for significance in phylogenies: too many alternatives for the same outcome, or an appeal to Journal editors

highly influential events

In East and Central Africa, the nymphalid butterflies Danaus chrysippus, Acraea encedon and A. encedana are involved in a Müllerian mimicry complex. Unusually for aposematic mimetic organisms, the three species show extensive colour pattern polymorphism. Within the same geographic zone, the three species show female-biased sex ratios as a consequence of infection by maternally-inherited, male-killing bacteria. The co-occurrence of biased sex ratios and aposematic polymorphism within these three sympatric, mimetic butterfly species has led to the speculation that invasion by the male-killing bacteria and the subsequent female-biased sex ratios are the underlying reason for the maintenance of colour polymorphism in these species,

A hypothesis to explain host species differences in resistance to multi-host parasites

We have witnessed great interest and a wealth of promise in content-based image retrieval as an emerging technology. While the last decade laid foundation to such promise, it also paved the way for a large number of new techniques and systems, got many new people involved, and triggered stronger

Abstract: We study how early stage new ideas are turned into successful businesses. Even promising ideas can be unprofitable if they fail on one dimension, such as technical feasibility, correspondence to market demand or patentability. To screen good projects the entrepreneur needs to hire

reviews the important results from these studies and also presents new ideas and alternative interpretations which further explain the success of the EnKF. In addition to providing the theoretical framework needed for using the EnKF, there is also a focus on the algorithmic formulation and optimal

used by applications to communicate their requirements to the network in a robust and efficient way, independent of the specific requirements.” It has been more than 10 years since the original idea