Synchronization in the presence of memory

We study the effect of memory on synchronization of identical chaotic systems driven by common external noises. Our examples show that while in general synchronization transition becomes more difficult to meet when memory range increases, for intermediate ranges the synchronization tendency of systems can be enhanced. Generally the synchronization transition is found to depend on the memory range and the ratio of noise strength to memory amplitude, which indicates on a possibility of optimizing synchronization by memory. We also point out on a close link between dynamics with memory and noise, and recently discovered synchronizing properties of networks with delayed interactions

Using choreographies to support the gamification process on the development of an application to reduce electricity costs

Building automation systems contribute to reduce electricity costs by managing distributed energy resources in an efficient way. However, a large share of consumption cannot be optimized through automation alone, since it mainly depends on human interactions. Gamification can be used as one form of changing users’ behaviours [1], but its implementation does require assumptions on the behaviour patterns that need to be identified, encouraged, or discouraged. To tackle this problem, we propose a framework that joins building automation solutions with gamification techniques to enable behavioural demand response.info:eu-repo/semantics/publishedVersio

Suprabenthos distribution in a shallow temperate estuary (Mondego estuary, western Portugal)

For this paper we studied the suprabenthos distribution in the Mondego estuary's southern arm. Samples were taken monthly at two stations from October 1999 to May 2000. The collections were made during high spring tides, using a suprabenthic net mounted on a sledge (40 cm diameter, 500 mm mesh) in suprabenthic tows. Mollusca and Crustacea, especially Mysidacea, dominated the suprabenthos. Other important groups were the Copepoda, Isopoda, eggs and post larvae of Pisces, and larval stages of Decapoda. The high densities of Hydrobia ulvae (Pennant, 1777) post-larvae caught in the downstream station, which decreased species evenness due to the dominance of this species, led to a spatial diversity pattern with higher diversities in the upstream area. The mysid species Mesopodopsis slabberi (Van Beneden, 1861), together with the calanoid copepod Acartia tonsa (Dana, 1848), dominated in the upstream area. Significant differences were found in community structure between the two selected areas of the estuary, with a dominance of the spatial structure in the cluster analysis.Para este artículo, estudiamos la distribución del suprabentos en el brazo sur del estuario del río Mondego. Las muestras se tomaron mensualmente entre octubre de 1999 y mayo de 2000 en dos áreas: una de mayor flujo, río arriba, y otra en la zona de encuentro con el mar. Las recolecciones se hicieron durante las mareas vivas, utilizando una red suprabentónica de 40 cm de diámetro y 500 mm de luz de malla. Los moluscos y los crustáceos, especialmente los misidáceos, fueron los grupos que dominaron el suprabentos. Otros grupos importantes fueron los copépodos, los isópodos, los huevos y poslarvas de peces y las larvas de decápodos. La captura de altas densidades de poslarvas de Hydrobia ulvae (Pennant, 1777) en el área de encuentro desvela que su predominio es el causante de la disminución en la uniformidad de las especies en esta zona y, como consecuencia, se ha desarrollado para ella un patrón mayor de diversidad espacial. La especie Mesopodopsis slabberi (Van Beneden, 1861), junto con el copépodo calanoide Acartia tonsa (Dana, 1848), dominaron el área de mayor flujo, río arriba. Se encontraron diferencias significativas entre las estructuras de la comunidad de las dos áreas del estuario seleccionadas, dominando la estructura espacial en el análisis por agrupación (efectuado mediante cluster).Instituto Español de Oceanografí

Things you need to know if you are writing a scientific paper, thesis or report in Engineering or Science

This paper focuses on the common mistakes made by students at the early stages of research when writing scientific papers, thesis and reports. It points out mistakes to be avoided and the basic rules that can be inferred by reading a few scientific documents but are not usually clearly written and that we, as professors, end up teaching over and over again. The outcome of this paper will be, hopefully, that we will not need to correct the same common mistakes again and you, as a student, will have a faster lane to publishing. Starting with the abstract: it is composed of a single paragraph, does not contain acronyms or references and describes in short the work, main highlights and points out the results or main conclusions obtained from the work being presented. The abstract is an independent part of the paper and commonly has a character or word limit that you need to respect. It can be read as a “stand-alone” and the paper starts in the introduction, meaning that the introduction is not the sequence of the abstract and it can have some text in common if needed.info:eu-repo/semantics/publishedVersio

The Ferromagnetic Potts model under an external magnetic field: an exact renormalization group approach

The q-state ferromagnetic Potts model under a non-zero magnetic field coupled with the 0^th Potts state was investigated by an exact real-space renormalization group approach. The model was defined on a family of diamond hierarchical lattices of several fractal dimensions d_F. On these lattices, the renormalization group transformations became exact for such a model when a correlation coupling that singles out the 0^th Potts state was included in the Hamiltonian. The rich criticality presented by the model with q=3 and d_F=2 was fully analyzed. Apart from the Potts criticality for the zero field, an Ising-like phase transition was found whenever the system was submitted to a strong reverse magnetic field. Unusual characteristics such as cusps and dimensional reduction were observed on the critical surface.Comment: 8 pages, 6 figures. Accepted to be published in Phys. Rev B (2006

The impact of two-dimensional elastic disk

The impact of a two-dimensional elastic disk with a wall is numerically studied. It is clarified that the coefficient of restitution (COR) decreases with the impact velocity. The result is not consistent with the recent quasi-static theory of inelastic collisions even for very slow impact. The abrupt drop of COR is found due to the plastic deformation of the disk, which is assisted by the initial internal motion.(to be published in J. Phys. Soc. Jpn.)Comment: 6 Pages,2 figure