Convergence of a linearly transformed particle method for aggregation equations

We study a linearly transformed particle method for the aggregation equation with smooth or singular interaction forces. For the smooth interaction forces, we provide convergence estimates in $L^1$ and $L^\infty$ norms depending on the regularity of the initial data. Moreover, we give convergence estimates in bounded Lipschitz distance for measure valued solutions. For singular interaction forces, we establish the convergence of the error between the approximated and exact flows up to the existence time of the solutions in $L^1 \cap L^p$ norm

Habitat Variation in Vernal Pool Ecosystems on Both Sides of the Strait of Gibraltar

We studied vernal pool (VP) ecosystems along a latitudinal gradient crossing the Strait of Gibraltar in order to determine its role in the distribution of VP plant communities. We analyzed flora, vegetation, physical–chemical water parameters, and climatic data from two vernal pool areas on both the European (Iberian) and African (Moroccan) sides of the Strait. Despite the minor distance between both territories, the pools clearly differed in species composition and ecology. However, they showed a similar vegetation zonation in growth forms, including isoetid, batrachiid, and helophytic vegetation. The distribution of the plant communities was related to nutrient load, temperature, and precipitation. Water nitrate concentration was higher in Morocco, where VPs are characterized by Isoetes velata subsp. adspersa and Ranunculus saniculifolius communities. Iberian VPs had lower water nitrate content, and were characterized by Isoetes velata subsp. velata and Ranunculus peltatus communities. We think this nutrient difference is likely to be caused by the different land management regime on each side of the Strait, with more intensive agriculture in Morocco. Long-term (historical) and present-day (ecological) processes have been proposed to account for the habitat variation in vernal pool ecosystems on both sides of the Strait of Gibraltar

Chronic Illness-Related Shame: Development of a New Scale and Novel Approach for IBD Patients' Depressive Symptomatology

The aims of the present study were to develop and validate a scale specifically focused on shame feelings derived from chronic illness-related experiences, the Chronic Illness-related Shame Scale (CISS) and to fill a gap in literature and analyse the role of this construct in the association between inflammatory bowel disease (IBD) symptomatology and depressed mood. This study comprised two samples: a sample of 161 IBD patients and a mixed sample of 65 chronic patients that reported medical data and completed self-report measures. The CISS's unidimensional seven-item structure was evaluated through confirmatory factor analyses. These analyses revealed good to excellent global and local adjustments in both samples. Results also showed that the CISS presents excellent internal consistencies and convergent, concurrent and divergent validity, being a valid, short and robust scale. Furthermore, the present study explored through path analyses, the role of CISS and self-judgement in the relationship between IBD symptomatology and depressed mood. Results showed that, although the level of IBD symptomatology directly predicted patients' depressive symptoms, the majority of this effect was mediated by CISS and self-judgement. Possible explanations for these findings are discussed in more detail in the succeeding text. The present study seems to highlight the pertinence of developing IBD patients' self-compassionate abilities to adaptively deal with symptomatology and related shame feelings. It thus may represent an avenue for the development of compassionate-based interventions for IBD patients and for the conduction of future studies exploring the shame phenomenon in other chronic illnesses. Copyright © 2016 John Wiley & Sons, Ltd

Some aspects of the synchronization in coupled maps

Through numerical simulations we analyze the synchronization time and the Lyapunov dimension of a coupled map lattice consisting of a chain of chaotic logistic maps exhibiting power law interactions. From the observed behaviors we find a lower bound for the size $N$ of the lattice, independent of the range and strength of the interaction, which imposes a practical lower bound in numerical simulations for the system to be considered in the thermodynamic limit. We also observe the existence of a strong correlation between the averaged synchronization time and the Lyapunov dimension. This is an interesting result because it allows an analytical estimation of the synchronization time, which otherwise requires numerical simulations.Comment: 4 pages, 6 figure

6β-Chloro-5α-hydr­oxy-20-oxopregnan-3β-yl acetate

The title steroid, C23H35ClO4, is a pregnane derivative prepared by ring opening of the corresponding 5α,6α-ep­oxy steroid with BiCl3. There are two symmetry-independent mol­ecules in the asymmetric unit that show no significant differences concerning bond lengths and angles. The conformation of the six-membered rings in both mol­ecules is close to a chair form, while the five-membered ring adopts an envelope conformation. All rings in both mol­ecules are trans-fused. The mol­ecules are held together by an extensive O—H⋯O hydrogen-bonding network

Sistema distribuído de monitorização de consumos e de qualidade de energia elétrica

Este artigo descreve a implementação e teste de um sistema distribuído de medição de grandezas elétricas, concebido para utilização com cargas tipicamente existentes nas residências, que possibilita a monitorização remota do consumo e também possui capacidade de deteção de eventos de qualidade de energia elétrica. O sistema é operado pelo utilizador a partir de um computador, através de um programa monitorizador dotado de interface gráfica, que recebe os dados recolhidos por um conjunto de nós sensores ligados às cargas que se deseja monitorizar. A comunicação de dados assenta sobre uma rede de sensores sem fios desenvolvida com base nos protocolos IEEE 802.15.4 e ZigBee. Os nós da rede são baseados no circuito integrado CC2530, da Texas Instruments, que integra um microcontrolador e um transceiver RF num mesmo chip. A implementação do sistema envolveu a concepção e desenvolvimento do hardware dos nós sensores, que efetuam a medição das grandezas elétricas, do software embebido nos nós da rede de sensores sem fios, que gere a aquisição e envio dos dados dos nós sensores até ao computador, e do software monitorizador no computador. Os resultados obtidos nos testes realizados excederam as expetativas iniciais, tendo os erros de medição ficado abaixo do patamar de 1%.Fundação para a Ciência e a Tecnologia (FCT

Development of a metric of aquatic invertebrates for volunteers (MAIV): a simple and friendly biotic metric to assess ecological quality of streams

Citizen science activities, involving local people in volunteer-supported and sustainable monitoring programs, are common. In this context, the objective of the present work was to develop a simple Metric of Aquatic Invertebrates for Volunteers (MAIV), including a user-friendly tool that can be easily accessed by volunteers, and to evaluate the e ciency of a volunteer monitoring program following an audit procedure. To obtain MAIV values, macroinvertebrate communities were reduced to 18 surrogate taxa, which represented an acceptable compromise between simplicity, e ciency, and reproducibility of the data, compared to the regular Water Framework Directive monitoring. When compared to results obtained with the National Classification System of Portugal, MAIV accurately detected moderate, poor, and bad ecological status. Thus, MAIV can be used by volunteers as a complement to the o cial monitoring program, as well as a prospective early warning tool for local problems related to ecological quality. Volunteers were students supervised by their teachers. Results obtained by volunteers were compared to results obtained by experts on macroinvertebrate identification to measure the e ciency of the procedure, by counting gains and losses on sorting, and identification. Characteristics of groups of volunteers (age and school level) did not influence significantly the e ciency of the procedure, and generally results of volunteers and experts matched.info:eu-repo/semantics/publishedVersio