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Transactions on Large-Scale Data- and Knowledge...
57,78 € *
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The LNCS journal Transactions on Large-Scale Data- and Knowledge-Centered Systems focuses on data management, knowledge discovery, and knowledge processing, which are core and hot topics in computer science. Since the 1990s, the Internet has become the main driving force behind application development in all domains. An increase in the demand for resource sharing across different sites connected through networks has led to an evolution of data- and knowledge-management systems from centralized systems to decentralized systems enabling large-scale distributed applications providing high scalability. Current decentralized systems still focus on data and knowledge as their main resource. Feasibility of these systems relies basically on P2P (peer-to-peer) techniques and the support of agent systems with scaling and decentralized control. Synergy between grids, P2P systems, and agent technologies is the key to data- and knowledge-centered systems in large-scale environments. This, the 20th issue of Transactions on Large-Scale Data- and Knowledge-Centered Systems, presents a representative and useful selection of articles covering a wide range of important topics in the domain of advanced techniques for big data management. Big data has become a popular term, used to describe the exponential growth and availability of data. The recent radical expansion and integration of computation, networking, digital devices, and data storage has provided a robust platform for the explosion in big data, as well as being the means by which big data are generated, processed, shared, and analyzed. In general, data are only useful if meaning and value can be extracted from them. Big data discovery enables data scientists and other analysts to uncover patterns and correlations through analysis of large volumes of data of diverse types. Insights gleaned from big data discovery can provide businesses with significant competitive advantages, leading to more successful marketing campaigns, decreased customer churn, and reduced loss from fraud. In practice, the growing demand for large-scale data processing and data analysis applications has spurred the development of novel solutions from both industry and academia.

Anbieter: Dodax
Stand: 03.06.2020
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High-Performance Modelling and Simulation for B...
71,90 CHF *
ggf. zzgl. Versand

This open access book was prepared as a Final Publication of the COST Action IC1406 “High-Performance Modelling and Simulation for Big Data Applications (cHiPSet)“ project. Long considered important pillars of the scientific method, Modelling and Simulation have evolved from traditional discrete numerical methods to complex data-intensive continuous analytical optimisations. Resolution, scale, and accuracy have become essential to predict and analyse natural and complex systems in science and engineering. When their level of abstraction raises to have a better discernment of the domain at hand, their representation gets increasingly demanding for computational and data resources. On the other hand, High Performance Computing typically entails the effective use of parallel and distributed processing units coupled with efficient storage, communication and visualisation systems to underpin complex data-intensive applications in distinct scientific and technical domains. It is then arguably required to have a seamless interaction of High Performance Computing with Modelling and Simulation in order to store, compute, analyse, and visualise large data sets in science and engineering. Funded by the European Commission, cHiPSet has provided a dynamic trans-European forum for their members and distinguished guests to openly discuss novel perspectives and topics of interests for these two communities. This cHiPSet compendium presents a set of selected case studies related to healthcare, biological data, computational advertising, multimedia, finance, bioinformatics, and telecommunications.

Anbieter: Orell Fuessli CH
Stand: 03.06.2020
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High-Performance Computing on Complex Environments
170,00 CHF *
ggf. zzgl. Versand

With recent changes in multicore and general-purpose computing on graphics processing units, the way parallel computers are used and programmed has drastically changed. It is important to provide a comprehensive study on how to use such machines written by specialists of the domain. The book provides recent research results in high-performance computing on complex environments, information on how to efficiently exploit heterogeneous and hierarchical architectures and distributed systems, detailed studies on the impact of applying heterogeneous computing practices to real problems, and applications varying from remote sensing to tomography. The content spans topics such as Numerical Analysis for Heterogeneous and Multicore Systems; Optimization of Communication for High Performance Heterogeneous and Hierarchical Platforms; Efficient Exploitation of Heterogeneous Architectures, Hybrid CPU+GPU, and Distributed Systems; Energy Awareness in High-Performance Computing; and Applications of Heterogeneous High-Performance Computing. * Covers cutting-edge research in HPC on complex environments, following an international collaboration of members of the ComplexHPC * Explains how to efficiently exploit heterogeneous and hierarchical architectures and distributed systems * Twenty-three chapters and over 100 illustrations cover domains such as numerical analysis, communication and storage, applications, GPUs and accelerators, and energy efficiency

Anbieter: Orell Fuessli CH
Stand: 03.06.2020
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Dynamics of magnetic vortices and antivortices ...
59,90 CHF *
ggf. zzgl. Versand

Magnetic singularities in micron-sized ferromagnetic elements have been proposed for new concepts of magnetic data storage and are an ideal model system for the investigation of magnetization dynamics. This thesis deals with the dynamics of magnetic vortices as well as antivortices at picosecond and nanosecond timescales. High frequency alternating fields and spin-polarized currents are used for the manipulation of the vortices’ magnetic states. The special case of rotational excitation is investigated by time-resolved magnetic transmission x-ray microscopy, micromagnetic simulations, and analytical calculations. For magnetic antivortices we find an asymmetric response to field and current excitation that we can explain with the negative winding number of their domains. In addition, we study the dynamics of magnetic vortices in the frequency domain by means of ferromagnetic absorption spectroscopy. We find deviations from the linear dynamics that we assumed previously. These deviations are explained in the context of a nonparabolic confining potential and a critical maximum velocity of vortex motion. Absorption spectra are found to be crucially influenced by the continuous reversal of the vortex-core polarization for high amplitudes of excitation. The insight into vortex dynamics gained in this work is crucial for a successful application of vortices for data storage devices. Magnetische Singularitäten in mikroskopisch kleinen, ferromagnetischen Dünnfilmelementen könnten in der Zukunft in magnetischen Speichermedien Verwendung finden. Des Weiteren stellen sie ein ideales Modellsystem für die Untersuchung der Magnetisierungsdynamik dar. Diese Arbeit behandelt die Dynamik magnetischer Wirbel, der sogenannten Vortizes und Antivortizes, auf Zeitskalen von wenigen Pikosekunden bis zu mehreren Nanosekunden. Hochfrequente magnetische Wechselfelder und spin-polarisierte Ströme werden genutzt um die magnetischen Zustände dieser Strukturen gezielt zu verändern. Mittels zeitaufgelöster Röntgenmikroskopie, mikromagnetischer Simulationen und analytischer Berechnungen untersuchen wir den speziellen Fall einer rotierenden Anregung. Für magnetische Antivortizes erhalten wir ein asymmetrisches Verhalten bezüglich der Feld- und Stromanregung, welche auf die besondere, negative Windungszahl der Domänenstruktur zurückzuführen ist. Zusätzlich erforschen wir die Dynamik magnetischer Vortizes im Frequenzraum mittels ferromagnetischer Absorptionsspektroskopie. Hierbei finden wir Abweichungen von den zuvor entwickelten linearen Bewegungsgleichungen. Diese Abweichungen lassen sich jedoch durch die Annahme nicht-parabolischer Einschluss-Potentiale und einer kritischen maximalen Geschwindigkeit der Vortexbewegung erklären. Es stellt sich heraus, dass die gemessenen Absorptionsspektren ab einer gewissen Anregungsamplitude grundlegend durch das kontinuierliche Schalten der Vortex-Polarisation beeinflusst werden. Der Einblick, der durch die vorliegende Arbeit in die Dynamik magnetischer Wirbel gewonnen wird, ist Grundlage für eine erfolgreiche Anwendung magnetischer Vortizes als Speichermedium.

Anbieter: Orell Fuessli CH
Stand: 03.06.2020
Zum Angebot
Electrical Machines Diagnosis
140,00 CHF *
ggf. zzgl. Versand

Monitoring and diagnosis of electrical machine faults is a scientific and economic issue which is motivated by objectives for reliability and serviceability in electrical drives. This book provides a survey of the techniques used to detect the faults occurring in electrical drives: electrical, thermal and mechanical faults of the electrical machine, faults of the static converter and faults of the energy storage unit. Diagnosis of faults occurring in electrical drives is an essential part of a global monitoring system used to improve reliability and serviceability. This diagnosis is performed with a large variety of techniques: parameter estimation, state observation, Kalman filtering, spectral analysis, neural networks, fuzzy logic, artificial intelligence, etc. Particular emphasis in this book is put on the modeling of the electrical machine in faulty situations. Electrical Machines Diagnosis presents original results obtained mainly by French researchers in different domains. It will be useful as a guideline for the conception of more robust electrical machines and indeed for engineers who have to monitor and maintain electrical drives. As the monitoring and diagnosis of electrical machines is still an open domain, this book will also be very useful to researchers.

Anbieter: Orell Fuessli CH
Stand: 03.06.2020
Zum Angebot
Electrical Machines Diagnosis
140,00 CHF *
ggf. zzgl. Versand

Monitoring and diagnosis of electrical machine faults is ascientific and economic issue which is motivated by objectives forreliability and serviceability in electrical drives. This book provides a survey of the techniques used to detect thefaults occurring in electrical drives: electrical, thermal andmechanical faults of the electrical machine, faults of the staticconverter and faults of the energy storage unit. Diagnosis of faults occurring in electrical drives is an essentialpart of a global monitoring system used to improve reliability andserviceability. This diagnosis is performed with a large variety oftechniques: parameter estimation, state observation, Kalmanfiltering, spectral analysis, neural networks, fuzzy logic,artificial intelligence, etc. Particular emphasis in this book isput on the modeling of the electrical machine in faultysituations. Electrical Machines Diagnosis presents original results obtainedmainly by French researchers in different domains. It will beuseful as a guideline for the conception of more robust electricalmachines and indeed for engineers who have to monitor and maintainelectrical drives. As the monitoring and diagnosis of electricalmachines is still an open domain, this book will also be veryuseful to researchers.

Anbieter: Orell Fuessli CH
Stand: 03.06.2020
Zum Angebot
High-Performance Modelling and Simulation for B...
51,99 € *
ggf. zzgl. Versand

This open access book was prepared as a Final Publication of the COST Action IC1406 “High-Performance Modelling and Simulation for Big Data Applications (cHiPSet)“ project. Long considered important pillars of the scientific method, Modelling and Simulation have evolved from traditional discrete numerical methods to complex data-intensive continuous analytical optimisations. Resolution, scale, and accuracy have become essential to predict and analyse natural and complex systems in science and engineering. When their level of abstraction raises to have a better discernment of the domain at hand, their representation gets increasingly demanding for computational and data resources. On the other hand, High Performance Computing typically entails the effective use of parallel and distributed processing units coupled with efficient storage, communication and visualisation systems to underpin complex data-intensive applications in distinct scientific and technical domains. It is then arguably required to have a seamless interaction of High Performance Computing with Modelling and Simulation in order to store, compute, analyse, and visualise large data sets in science and engineering. Funded by the European Commission, cHiPSet has provided a dynamic trans-European forum for their members and distinguished guests to openly discuss novel perspectives and topics of interests for these two communities. This cHiPSet compendium presents a set of selected case studies related to healthcare, biological data, computational advertising, multimedia, finance, bioinformatics, and telecommunications.

Anbieter: Thalia AT
Stand: 03.06.2020
Zum Angebot
High-Performance Computing on Complex Environments
125,99 € *
ggf. zzgl. Versand

With recent changes in multicore and general-purpose computing on graphics processing units, the way parallel computers are used and programmed has drastically changed. It is important to provide a comprehensive study on how to use such machines written by specialists of the domain. The book provides recent research results in high-performance computing on complex environments, information on how to efficiently exploit heterogeneous and hierarchical architectures and distributed systems, detailed studies on the impact of applying heterogeneous computing practices to real problems, and applications varying from remote sensing to tomography. The content spans topics such as Numerical Analysis for Heterogeneous and Multicore Systems; Optimization of Communication for High Performance Heterogeneous and Hierarchical Platforms; Efficient Exploitation of Heterogeneous Architectures, Hybrid CPU+GPU, and Distributed Systems; Energy Awareness in High-Performance Computing; and Applications of Heterogeneous High-Performance Computing. * Covers cutting-edge research in HPC on complex environments, following an international collaboration of members of the ComplexHPC * Explains how to efficiently exploit heterogeneous and hierarchical architectures and distributed systems * Twenty-three chapters and over 100 illustrations cover domains such as numerical analysis, communication and storage, applications, GPUs and accelerators, and energy efficiency

Anbieter: Thalia AT
Stand: 03.06.2020
Zum Angebot
Dynamics of magnetic vortices and antivortices ...
43,99 € *
ggf. zzgl. Versand

Magnetic singularities in micron-sized ferromagnetic elements have been proposed for new concepts of magnetic data storage and are an ideal model system for the investigation of magnetization dynamics. This thesis deals with the dynamics of magnetic vortices as well as antivortices at picosecond and nanosecond timescales. High frequency alternating fields and spin-polarized currents are used for the manipulation of the vortices’ magnetic states. The special case of rotational excitation is investigated by time-resolved magnetic transmission x-ray microscopy, micromagnetic simulations, and analytical calculations. For magnetic antivortices we find an asymmetric response to field and current excitation that we can explain with the negative winding number of their domains. In addition, we study the dynamics of magnetic vortices in the frequency domain by means of ferromagnetic absorption spectroscopy. We find deviations from the linear dynamics that we assumed previously. These deviations are explained in the context of a nonparabolic confining potential and a critical maximum velocity of vortex motion. Absorption spectra are found to be crucially influenced by the continuous reversal of the vortex-core polarization for high amplitudes of excitation. The insight into vortex dynamics gained in this work is crucial for a successful application of vortices for data storage devices. Magnetische Singularitäten in mikroskopisch kleinen, ferromagnetischen Dünnfilmelementen könnten in der Zukunft in magnetischen Speichermedien Verwendung finden. Des Weiteren stellen sie ein ideales Modellsystem für die Untersuchung der Magnetisierungsdynamik dar. Diese Arbeit behandelt die Dynamik magnetischer Wirbel, der sogenannten Vortizes und Antivortizes, auf Zeitskalen von wenigen Pikosekunden bis zu mehreren Nanosekunden. Hochfrequente magnetische Wechselfelder und spin-polarisierte Ströme werden genutzt um die magnetischen Zustände dieser Strukturen gezielt zu verändern. Mittels zeitaufgelöster Röntgenmikroskopie, mikromagnetischer Simulationen und analytischer Berechnungen untersuchen wir den speziellen Fall einer rotierenden Anregung. Für magnetische Antivortizes erhalten wir ein asymmetrisches Verhalten bezüglich der Feld- und Stromanregung, welche auf die besondere, negative Windungszahl der Domänenstruktur zurückzuführen ist. Zusätzlich erforschen wir die Dynamik magnetischer Vortizes im Frequenzraum mittels ferromagnetischer Absorptionsspektroskopie. Hierbei finden wir Abweichungen von den zuvor entwickelten linearen Bewegungsgleichungen. Diese Abweichungen lassen sich jedoch durch die Annahme nicht-parabolischer Einschluss-Potentiale und einer kritischen maximalen Geschwindigkeit der Vortexbewegung erklären. Es stellt sich heraus, dass die gemessenen Absorptionsspektren ab einer gewissen Anregungsamplitude grundlegend durch das kontinuierliche Schalten der Vortex-Polarisation beeinflusst werden. Der Einblick, der durch die vorliegende Arbeit in die Dynamik magnetischer Wirbel gewonnen wird, ist Grundlage für eine erfolgreiche Anwendung magnetischer Vortizes als Speichermedium.

Anbieter: Thalia AT
Stand: 03.06.2020
Zum Angebot