Generic algebraic libraries run the risk of losing eeciency compared to non-generic libraries. To solve the seeming antagonism between genericity and eeciency, we propose a technique which we call lifting. The lifting process is an abstraction process which starts with a well-known eecient algorithm and abstracts carefully from it. As lifting guarantees that fast non-generic algorithms instanti...

Sexually selected male courtship displays often involve multiple behavioural and physical traits, but little is known about the function of different traits in mate choice. Here, we examine female courtship behaviours to learn how male traits interact to influence female mating decisions. In satin bowerbirds (Ptilonorhynchus violaceus), successful males give highly aggressive, intense behaviour...

Boolean matrices, the incidence matrices of a graph, are known not to be the (universal) matrices of a Boolean algebra. Here, we also show that their usual composition cannot make them the matrices of any algebra. Yet, later on, we “show” that it can. This seeming paradox comes from the hidden intrusion of a widespread set-theoretical (mis) definition and notation and denies its harmlessness. A...

Similarity is central in human cognition, playing a role in a wide range of cognitive processes. In three studies, we demonstrate that subjective similarity may change as a function of temporal distance, with some events seeming more similar when considered in the near future, while others increase in similarity as temporal distance increases. Given the ubiquity of inter-temporal thought, and t...

The paper makes a case for the inclusion of indigenous African counselling practices in 21st Century practices. seeming absence theoretical underpinning practice, especially within Ghanaian ecosystem is addressed, together with what constitutes guidance and counselling. Additionally, tools available uses by counsellor are scrutinized, situations that precipitate settings. merits demerits also e...

D URING RECENT STUDY to determine the frequency of the different types of anemia present in “well” infants and children attending a Maternal-Child Health clinic in eastern Saudi Arabia, it was found that at least 98.4 percent of anemic children had iron deficiency which was due to inadequate dietary intake of iron. This report is to point out that many seeming failures to respond to iron may be...

A right triangular billiard system is equivalent to the system of two colliding particles confined in a one-dimensional box. In spite of their seeming simplicity, no definite conclusion has been drawn so far concerning their ergodic properties. To answer this question, we transform the dynamics of the right triangular billiard system to a piecewise map and analytically prove the broken ergodici...

The Mesozoic lacustrine revolution (MLR) represents a major evolutionary event in the continental realm (Cohen 2003 ). The decline in taxic diversity at the family level in lacustrine environments that took place during the late Paleozoic–Middle Triassic was reversed later in the Mesozoic, with diversifi cation seeming to have continued to the Quaternary, although potential biases may have affe...

We discuss our recent observation of an atom-dimer Efimov resonance in an ultracold mixture of Cs atoms and Cs2 Feshbach molecules [Nature Phys. 5, 227 (2009)]. We review our experimental procedure and present additional data involving a non-universal g-wave dimer state, to contrast our previous results on the universal s-wave dimer. We resolve a seeming discrepancy when quantitatively comparin...