K-means algorithm is a well-known clustering algorithm. In spite of its advantages such as high speed and ease of employment, this algorithm suffers from the problem of local optima. In order to overcome this problem, a lot of works have been carried out on clustering. This paper presents a hybrid extended cuckoo optimization algorithm (ECOA) and K-means (K) algorithm called ECOA-K. The COA alg...

—Recent experiments support the longstanding hypothesis that Common Cuckoos (Cuculus canorus) are mimics of Eurasian Sparrowhawks (Accipiter nisus). Additional experiments further suggest that mimicry benefits the cuckoos by reducing the intensity of mobbing they suffer near host nests, at least in some host populations, potentially increasing their access to the hosts’ nests. We observed two s...

Nestlings of many brood parasites are reared together with those of their hosts, but still manage to monopolize a disproportionate share of the food delivered by adult hosts. We hypothesized that: (1) the low levels of host-specific pathogens of such brood parasite nestlings provide them with an advantage in competition for limited food; (2) a higher provisioning rate and the resulting better b...

The purpose of this brief note is to describe recent work in the area of cuckoo hashing, including a clear description of several open problems, with the hope of spurring further research.

eggs unlike their own? One possibility is that they are new hosts, with insufficient time to have evolved defences. The other is that defences are costly — for example, egg rejection may involve recognition errors — and parasitism levels may be below the threshold where it pays to sustain these costs. Even among host species that have evolved egg rejection, individuals are less likely to reject...

Layered clustering allows unmodified distributed file systems to enjoy many of the benefits of cluster-based file services. By interposing between clients and servers, layered clustering requires no changes to clients, servers, or the client-server protocol. Cuckoo demonstrates one particular use of layered clustering: spreading load among a set of otherwise independent NFS servers. Specificall...

This paper proposes a novel degradation prognosis of Proton Exchange Membrane Fuel Cell (PEMFC) based on Wavelet Neural Network (WNN) and Cuckoo Search Algorithm (CSA). The proposed method considering the main operating conditions PEMFC can be applied to health state prognostic under different conditions. First, data are reconstructed by locally weighted scatterplot smoothing filter noise. Then...