This paper addresses the clustering problem given the similarity matrix of a dataset. By representing this matrix as a weighted graph we transform this problem to a graph clustering/partitioning problem which aims at identifying groups of strongly inter-connected vertices. We define two distinct criteria with the aim of simultaneously minimizing the cut size and obtaining balanced clusters. The...

A good clustering performance depends on the quality of the distance function used to asses similarity. In this paper we propose a pairwise document coreference model to improve performance over a wordvector similarity approach for the WePS 3 clustering task. We identify a simple criterion which discriminates between highly ambiguous queries, i.e. many small clusters, and balanced queries, i.e....

The world of High Performance Computing (HPC) has seen a major shift towards commodity clusters in the last 10 years. A new company, SiCortex, has set out to break this trend. They have created what they claim to be a balanced cluster which makes use of low-power MIPS processors and a custom interconnect in an effort to avoid many of the bottlenecks plaguing most modern clusters. In this paper,...

The limited battery power available in the nodes of an ad hoc network makes it mandatory to reduce the energy expenditure. Thus, reducing the transmission distances between nodes and balancing the number of nodes among clusters are two effective approaches to battery power conservation in the design of green wireless ad hoc networks. To realise this goal, the concept of relative neighbourhood g...

We computationally study whether it is possible to stimulate a neuronal population in such a way that its mean firing rate increases without an increase of the population's net synchronization. For this, we use coordinated reset (CR) stimulation, which has previously been developed to desynchronize populations of oscillatory neurons. Intriguingly, delivered to a population of predominantly sile...

Ecological regions are increasingly used as a spatial unit for planning and environmental management. It is important to define these regions in a scientifically defensible way to justify any decisions made on the basis that they are representative of broad environmental assets. The paper describes a methodology and tool to identify cohesive bioregions. The methodology applies an elicitation pr...

A wireless sensor network is a new kind of wireless Ad-Hoc network consisting of a large number of small low cost, power constrained sensors deployed in a large area for gathering information for a large variety of applications. Since sensors are power constrained devices, it is quite important to organize them in some fashion in order to minimize total energy consumption in communication with ...

This article holistically maps the consumption patterns of older Americans and compares the economic status of different groups (clusters) of elderly U.S. consumers. Using data from the 2010–2011 Consumer Expenditure Survey, the analysis focuses on the consumption patterns of households whose heads or spouses were age 65 and over. Our factor and cluster analyses revealed six consumption cluster...