The need to index and search huge highly repetitive sequence collections is rapidly arising in various fields, including computational biology, software repositories, versioned collections, and others. In this short survey we briefly describe the progress made along three research lines to address the problem: compressed suffix arrays, grammar compressed indexes, and Lempel-Ziv compressed indexes.

Repetitive questioning is due to an impaired episodic memory and is a frequent, often presenting, problem in patients with Alzheimer's disease (amnestic type). It is due to the patients' difficulties learning new information, retaining it, and recalling it, and is often aggravated by a poor attention span and easy distractibility. A number of factors may trigger and maintain repetitive question...

OBJECTIVE To investigate the frequency and pattern of a wide range of restricted and repetitive behaviors in the second year of life. METHOD Parents of 139 15-month-old typically developing infants from a community sample completed the Repetitive Behavior Questionnaire-2, giving information on restricted and repetitive behaviors (e.g., stereotyped motor movements, sensory interests, routines ...

Repetitive elements are important in genomic structures, functions and regulations, yet effective methods in precisely identifying repetitive elements in DNA sequences are not fully accessible, and the relationship between repetitive elements and periodicities of genomes is not clearly understood. We present an ab initio method to quantitatively detect repetitive elements and infer the consensu...

We extend a discrepancy bound of Lagarias and Pleasants for local weight distributions on linearly repetitive Delone sets show that similar holds also the more general case without finite complexity if linear repetitivity is replaced by $\varepsilon$-linear repetitivity. As result we establish are some sufficiently small $\varepsilon$ rectifiable, incommensurable multiscale substitution tilings...

Repetitive controllers are generally applied to reject periodic disturbances and to track periodic reference signals with a known period. Their design is based on The Internal Model Principle, proposed by Francis and Wonham. This paper describes a new finite-dimensional SISO repetitive controller for two different classes of nonlinear plants. Simulation results show asymptotic tracking of the p...

Case 1. A man, aged 22, was first seen as an out-patient in May, 1958. He complained of dyspnoea on strenuous exertion but was able to lead a normal active life for a man of his age. He had never been conscious of palpitation. His heart action was known to have been irregular since childhood but otherwise he had had no relevant illness; no previous electrocardiogram had been recorded. On clinic...

In 1906 Axel Thue showed how to construct an infinite non-repetitive (or squarefree) word on an alphabet of size 3. Since then this result has been rediscovered many times and extended in many ways. We present a two-dimensional version of this result. We show how to construct a rectangular tiling of the plane using 5 symbols which has the property that lines of tiles which are horizontal, verti...

Information and communication technology induced stress, called technostress, influences users negatively. Numerous investigations are made about technostress; however, none consider the concept of coping in order to explain strategies to avoid these negative consequences. Therefore, this paper develops a theoretical model to explain the coping process and how it influences technostress. The mo...