Gathering of autonomous mobile robots is a well known and challenging research problem for a system of multiple mobile robots. Most of the existing works consider the robots to be dimensionless or points. Algorithm for gathering fat robots (a robot represented as a unit disc) has been reported for three and four robots. This paper proposes a distributed algorithm which deterministically gathers...

This paper presents a new measure of symmetry for bifurcating structures, which relies not only on topology and ordering, but also on quantitative properties (e.g. length of branches). This measure is based on a specific biological mechanism and on the concept of minimum energy. The effectiveness of the approach is demonstrated in a classification test where leaves taken from plants growing und...

The research on pattern-avoidance has yielded so far limited knowledge on Wilf-ordering of permutations. The Stanley-Wilf limits limn→∞ n √ |Sn(τ )| and further works suggest asymptotic ordering of layered versus monotone patterns. Yet, Bóna has provided essentially the only known up to now result of its type on ordering of permutations: |Sn(1342)| < |Sn(1234)| < |Sn(1324)| for n ≥ 7. We give a...

The research on pattern-avoidance has yielded so far limited knowledge on Wilfordering of permutations. The Stanley-Wilf limits limn→∞ n √ |Sn(τ)| and further works suggest asymptotic ordering of layered versus monotone patterns. Yet, Bóna has provided essentially the only known up to now result of its type on complete ordering of Sk for k = 4: |Sn(1342)| < |Sn(1234)| < |Sn(1324)| for n ≥ 7, al...

BACKGROUND Auditory processing and auditory sensibility to high Frequency sounds. AIM To characterize the localization processes, temporal ordering, hearing patterns and detection of high frequency sounds, looking for possible relations between these factors. METHOD 32 hearing fourth grade students, born in city of São Paulo, were submitted to: a simplified evaluation of the auditory proces...

BACKGROUND Underuse and overuse of diagnostic tests have important implications for health outcomes and costs. Decision support technology purports to optimize the use of diagnostic tests in clinical practice. The objective of this review was to assess whether computerized clinical decision support systems (CCDSSs) are effective at improving ordering of tests for diagnosis, monitoring of diseas...

The Kohonen Self-Organizing Map (SOM) is a popular algorithm for constructing a nearest neighbor codebook in pattern space. The algorithm utilizes a prede ned ordering on the codebook to distribute the codes proportionally on the input manifold. In the end this ordering should re ect the structure of the input. Prototypical application of the SOM uses the codebook but neglects the ordering. We ...

BACKGROUND Better knowledge of the professional's motives for ordering laboratory tests in the case of diagnostic uncertainty may lead to interventions directed at reducing unnecessary testing. AIM To gain insight into the general practitioner's (GP's) motives for ordering laboratory tests for patients presenting with unexplained complaints. DESIGN OF STUDY Semi-structured interviews based ...

Ordered binary decision diagrams (OBDDs) have already proved useful for example in the veriication of combinational and sequential circuits. But the applications are limited, since the decriptive power of OBDDs is limited. Therefore several more general BDD models are studied. In this paper the so{called Parity{OBDDs are considered. The two polynomial time algorithms given are motivated by the ...