MATLAB

A well-known statement says that the PID controller is the "bread and butter" of the control engineer. This is indeed true, from a scientific standpoint. However, nowadays, in the era of computer science, when the paper and pencil have been replaced by the keyboard and the display of computers, one may equally say that MATLAB is the "bread" in the above statement. MATLAB has became a de facto tool for the modern system engineer. This book is written for both engineering students, as well as for practicing engineers. The wide range of applications in which MATLAB is the working framework, shows that it is a powerful, comprehensive and easy-to-use environment for performing technical computations. The book includes various excellent applications in which MATLAB is employed: from pure algebraic computations to data acquisition in real-life experiments, from control strategies to image processing algorithms, from graphical user interface design for educational purposes to Simulink embedded systems

Book of Abstracts 15th International Symposium on Computer Methods in Biomechanics and Biomedical Engineering and 3rd Conference on Imaging and Visualization

In this edition, the two events will run together as a single conference, highlighting the strong connection with the Taylor & Francis journals: Computer Methods in Biomechanics and Biomedical Engineering (John Middleton and Christopher Jacobs, Eds.) and Computer Methods in Biomechanics and Biomedical Engineering: Imaging and Visualization (JoãoManuel R.S. Tavares, Ed.). The conference has become a major international meeting on computational biomechanics, imaging andvisualization. In this edition, the main program includes 212 presentations. In addition, sixteen renowned researchers will give plenary keynotes, addressing current challenges in computational biomechanics and biomedical imaging. In Lisbon, for the first time, a session dedicated to award the winner of the Best Paper in CMBBE Journal will take place. We believe that CMBBE2018 will have a strong impact on the development of computational biomechanics and biomedical imaging and visualization, identifying emerging areas of research and promoting the collaboration and networking between participants. This impact is evidenced through the well-known research groups, commercial companies and scientific organizations, who continue to support and sponsor the CMBBE meeting series. In fact, the conference is enriched with five workshops on specific scientific topics and commercial software.info:eu-repo/semantics/draf

Advances in structural analysis and process monitoring of thermoplastic composite pipes.

Thermoplastic composite pipes (TCP) in comparison to other pipes have proven beneficial features due to its flexibility which includes being fit for purpose, lightweight and no corrosion. However, during the manufacturing of TCP which involves the consolidation process, certain defects may be induced in it because of certain parameters, and this can affect the performance of the pipe in the long run as the induced defects might lead to in-service defects. Current techniques used in the industry are facing challenges with on-the-spot detection in a continuous manufacturing system. In TCP manufacturing process, the pipe is regularly monitored. When a defect is noticed, the whole process stops, and the appropriate action is taken. However, shutting down the process is costly; hence it is vital to decrease the downtime during manufacturing to the barest minimum. The solutions include optimizing the process for reduction in the manufacturing defects amount and thoroughly understanding the effect of parameters which causes certain defect types in the pipe. This review covers the current state-of-the-art and challenges associated with characterizing the identified manufacturing induced defects in TCP. It discusses and describes all effective consolidation monitoring strategy for early detection of these defects during manufacturing through the application of suitable sensing technology that is compatible with the TCP. It can be deduced that there is a correlation between manufacturing process to the performance of the final part and selection of characterization technique as well as optimizing process parameters

Proceedings of the 2021 DigitalFUTURES

This open access book is a compilation of selected papers from 2021 DigitalFUTURES—The 3rd International Conference on Computational Design and Robotic Fabrication (CDRF 2021). The work focuses on novel techniques for computational design and robotic fabrication. The contents make valuable contributions to academic researchers, designers, and engineers in the industry. As well, readers encounter new ideas about understanding material intelligence in architecture

Pore structure characterization of low permeability rocks

Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Florianópolis, 2014.Hoje as pesquisas em rochas de baixa permeabilidade (grande tendência no mundo e em breve na indústria petrolífera brasileira) se voltam à escala de poros seja para investigação petrofísica, morfológica, de distribuição de tamanhos de grãos ou poros ou escoamento de fluidos, prática descrita pelos valores de permeabilidade. A avaliação destas propriedades por sua vez, é essencial ao desenvolvimento e exploração de reservas de hidrocarbonetos. No entanto, a determinação de parâmetros do sistema poroso nessas rochas, arenitos de baixa permeabilidade (TGS) e rochas selantes (SR), continua a ser um grande desafio devido à extrema variabilidade de ambientes deposicionais e complexa microestrutura composta por argilas e tamanhos de poros de submícrons a ångströms. Nesta tese empregou-se um conjunto de técnicas experimentais para a caracterização da estrutura porosa de TGS e SR. De tal modo, o trabalho foi dividido em dois tópicos principais: (i) Caracterização do sistema poroso e propriedades petrofísicas em TGS utilizando-se as técnicas de permeabilidade por decaimento de pulso (PDP), NMR de baixo campo, adsorção gasosa N2 (N2GA), porosimetria por intrusão Hg (MICP), nano- e microtomografia de raios X (res. Abstract : Nowadays, significant research effort in low-permeability rocks (a wide tendency elsewhere and soon in the Brazilian petroleum industry) has been focused on pore-scale petrophysics, morphologies and distributions, as well as fluid flow circulation described by the values of permeability. The evaluation of these properties in turn is essential for the assessment and exploitation of hydrocarbon reserves; however, determining pore system parameters in such rocks as tight gas sandstones (TGS) and seal rocks (SR) remains challenging because of the extreme variability in depositional environments resulting in complex pore structures comprised by clays and length scales from sub-microns to Angstroms. In this work we applied a set of techniques to characterize submicron-pore structures in TGS and SR. Therefore it was divided into two main topics of interest: (i) Characterization of petrophysical properties and pore systems in very low permeability TGS using Pulse-Decay Permeability (PDP), Low Field Nuclear Magnetic Resonance (LFNMR), Nitrogen Gas Adsorption (N2GA), Mercury Intrusion Capillary Pressure (MICP) and Multi-scale 3D X-ray Nano- and MicroCT (down to 0.7 µm resolution) techniques; (ii) Study of Photoacoustic Spectrometry (PAS) for determining thermal diffusivity (TD) and porosity in three seal rocks originating from dissimilar fields as a key issue for safe exploration, storage purposes (CO2 sequestration) and developments in shale characterization. The values obtained for TD were between 0.01667 and 0.09298 (cm2/s) while porosity ranged from 1.42 to 9%. For the analyzed TGS the 3D pore-structure characterization lead to pore tortuosity and shape factors ranges of 2.19-5.47 and 3.2-8.5, respectively, and pore size distributions tended to be bimodal for MICP, trimodal for 3D multi-scale and tetramodal for LFNMR measurements. The porosity values ranged from 1.94 to 11.96% obtained by the combination of N2GA and MICP techniques and permeability from 0.036 to 0.00066 mD by PDP technique. The measured pore-structure parameters were also used to predict empirical permeability in TGS (using e.g. Carman-Kozeny (Dullien, 1992) and Coates (1999) models). The set of applied methods has shown to be a useful tool for the unconventional reservoir characterization since it allows obtaining pore morphological and quantitative parameters which account for the permeability values

Proceedings of the 9th Arab Society for Computer Aided Architectural Design (ASCAAD) international conference 2021 (ASCAAD 2021): architecture in the age of disruptive technologies: transformation and challenges.

The ASCAAD 2021 conference theme is Architecture in the age of disruptive technologies: transformation and challenges. The theme addresses the gradual shift in computational design from prototypical morphogenetic-centered associations in the architectural discourse. This imminent shift of focus is increasingly stirring a debate in the architectural community and is provoking a much needed critical questioning of the role of computation in architecture as a sole embodiment and enactment of technical dimensions, into one that rather deliberately pursues and embraces the humanities as an ultimate aspiration

Gaze-Based Human-Robot Interaction by the Brunswick Model

We present a new paradigm for human-robot interaction based on social signal processing, and in particular on the Brunswick model. Originally, the Brunswick model copes with face-to-face dyadic interaction, assuming that the interactants are communicating through a continuous exchange of non verbal social signals, in addition to the spoken messages. Social signals have to be interpreted, thanks to a proper recognition phase that considers visual and audio information. The Brunswick model allows to quantitatively evaluate the quality of the interaction using statistical tools which measure how effective is the recognition phase. In this paper we cast this theory when one of the interactants is a robot; in this case, the recognition phase performed by the robot and the human have to be revised w.r.t. the original model. The model is applied to Berrick, a recent open-source low-cost robotic head platform, where the gazing is the social signal to be considered

Carbonatos autigénicos e estruturas de escape de fluidos no Golfo de Cádis

Doutoramento em GeociênciasEste trabalho foca-se no estudo das ocorrências de carbonatos autigénicos do Golfo de Cádis. A mineralogia, textura e valores de δ13Ccarbonatos indica que as diferentes litologias são formadas a partir de oxidação de metano que induz a cimentação dos sedimentos por precipitação de dolomite, calcite magnesiana, calcite e aragonite autigénicas. Os diferentes carbonatos autigénicos derivados de metano (CADM) ocorrem associados a vulcões e cones de lama, cristas diapiricas ou ao longo de falhas. Dois grupos distintos de CADM foram descritos. Um grupo cuja mineralogia é dominada por dolomite e que ocorrem como crostas, chaminés ou nódulos, e um outro grupo com a mineralogia dominada por aragonite e que ocorrem sub a forma de crostas, pavimentos ou montículos, no fundo do mar. Os diferentes grupos de CADM reflectem diferentes ambientes geoquímicos de formação. Os CADM aragoniticos formam-se próximo da interface sedimento/água, enquanto que os CADM dolomíticos formam-se por cimentação ao longo de condutas por onde o fluido circulou dentro da coluna sedimentar em ambientes confinados relativamente à água do mar. A ocorrência destes CADM é interpretada como indicadora de extenso escape de metano na área do Golfo de Cádis. Biomarcadores indicadores de Archaea capaz de realizar oxidação anaeróbica de metano (OAM) e biomarcadores indicadores de bactérias sulfato-redutoras foram identificados nas amostras de CADM. Estes resultados, apoiados também pelas observações de microscópio electrónico e micro-texturas características dos CADM, confirmam um activo envolvimento microbiano na formação destes CADM. A composição isotópica destes CADM indica que na sua formação estiveram envolvidos fluidos intersticiais com um claro contributo de água resultante da dissociação de hidratos de metano. As idades de amostras representativas de CADM, calculadas pela análise de U/Th indica que estes carbonatos se formaram no decorrer dos últimos 250 ka, em períodos correlacionados com rápidas variações paleoceanográficas, como as terminações dos períodos glaciares.This work focus on the occurrences of authigenic carbonates in the Gulf of Cadiz. Mineralogy, texture and δ13Ccarbonate values clearly indicate that the different carbonate lithologies are methane-derived (MDAC), formed by the lithification of sediments as result of the precipitation of authigenic dolomite, calcite, Mg-calcite and aragonite. The MDAC are found associated with mud volcanoes and mud cones, diapiric ridges or along faults. Two distinct groups of MDAC were described in the Gulf of Cadiz. A group dominated by dolomite mineralogy (dolomite crusts, nodules and chimneys) and a group of aragonite dominated carbonates (aragonite pavements, slabs, crusts and buildups). The different MDAC morphologic types reflect different geochemical formation environments. The aragonite pavements represent precipitation of authigenic carbonates at the sediment-seawater interface or close to it. The dolomite nodules, crusts and chimneys result from the cementation along fluid conduits inside the sediment column, in more confined geochemical environments. The widespread abundance of MDAC is interpreted as an evidence of several episodes of extensive methane seepage in the Gulf of Cadiz. Specific 13C-depleted lipid biomarkers indicating archaea involvement in the anaerobic oxidation of methane and bacterial lipid biomarkers also 13Cdepleted and related to sulphate reducing bacteria were both identified on the MDAC. These results, substantiated by SEM observations and by microbial related microfabrics, confirm that microbial activity has played an important role in carbonate authigenesis. Considering the minimum and maximum temperature limits admitted to be possible to occur in the Gulf of Cadiz, some of the MDAC samples indicate a formation from 18O-enriched pore fluids, interpreted as resulting from a contribution of dissociated gas hydrates to the pore waters from which the authigenic carbonates were formed. The estimated U/Th ages of selected dolomite chimneys indicate episodes of intense precipitation of the authigenic carbonates, at least during the last 250 ka, that correlate with periods of rapid paleoceanographic changes as the onsets of glacial/interglacial terminations