Stefan Freunberger's Books

Polysaccharide Based Supercapacitors

By: Soon Yee Liew,Wim Thielemans,Stefan Freunberger,Stefan Spirk

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Polysaccharide Based Supercapacitors

By: Soon Yee Liew,Wim Thielemans,Stefan Freunberger,Stefan Spirk

This book provides an excellent introduction into polysaccharide-based supercapacitors. It includes fundamental knowledge on supercaps as well as an overview of currently available approaches reported in the literature. Written by an international team of leading academics, this brief is aimed at a variety of readers with an interest in polysaccharide science and its applications.

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Springer

Published Date

ISBN 10

3319507540

ISBN 13

9783319507545

Polysaccharides as Battery Components

By: Stefan Spirk

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Polysaccharides as Battery Components

By: Stefan Spirk

The brief gives a comprehensive overview of the polysaccharide applications in the field of battery materials. Included is a historic overview as well as recent developments in the field including new battery types and chemistries. Written in an accessible style by academics, it is aimed at those new to the field as well as individuals who have interest in novel polysaccharide applications. Aimed at advanced undergraduates, academic and industrial researchers and professionals studying or using biobased polymers.

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Springer

Published Date

ISBN 10

3319659693

ISBN 13

9783319659695

Human Information Processing in Speech Quality Assessment

By: Stefan Uhrig

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Human Information Processing in Speech Quality Assessment

By: Stefan Uhrig

This book provides a new multi-method, process-oriented approach towards speech quality assessment, which allows readers to examine the influence of speech transmission quality on a variety of perceptual and cognitive processes in human listeners. Fundamental concepts and methodologies surrounding the topic of process-oriented quality assessment are introduced and discussed. The book further describes a functional process model of human quality perception, which theoretically integrates results obtained in three experimental studies. This book’s conceptual ideas, empirical findings, and theoretical interpretations should be of particular interest to researchers working in the fields of Quality and Usability Engineering, Audio Engineering, Psychoacoustics, Audiology, and Psychophysiology.

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Page Count

169

Publisher

Springer Nature

Published Date

ISBN 10

303071389X

ISBN 13

9783030713898

Transport interactions between gas and water in thin hydrophobic porous layers

By: Stefan Dwenger

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Transport interactions between gas and water in thin hydrophobic porous layers

By: Stefan Dwenger

In the last decades it has become clear that the transport of gas and water inside the mixed-wettable gas diffusion medium (GDL) plays a significant role for the improved understanding and optimization of the polymer electrolyte membrane fuel cells (PEMFC). In the present thesis the influence of liquid water and gas on the transport properties of gas diffusion media of polymer electrolyte membrane fuel cells (PEMFC) is examined numerically and experimentally. The different arising transport mechanisms and their influence as well as their representation in theoretical models (especially REV-based Darcy models) are presented. Moreover, an approach for modelling and simulation of the water distribution inside mixed-wettable porous media, especially gas diffusion layers, is discussed. To this end, a thermodynamical-based approach is chosen - the interactions between gaseous, liquid, and solid (carbon and PTFE) phases are treated with the help of a stationary scheme based on the interfacial energies which have to be minimized. For the optimization task itself the (parallel) simulated annealing approach is chosen and discussed. In addition algorithms for the generation and discretization of the virtual porous structures are described. Based on the results the modelling of constitutive relationships and transport parameters depending on water and PTFE content is performed. Besides that experiments for the measurement of those relationships are developed. A special focus is on the precise compression of the GDL sample and the influence on capillary pressure-saturation relationship, relative permeabilities, and effective diffusivities. Different apparatus for in- and through-plane measurements are developed. At the end the derived transport parameters and relationships are applied to a REV-based Darcy model which is compared with an integral experiment. The experimental setup is motivated by the counter-current flow regime of liquid water and gas at the cathode side of the PEMFC. It has been demonstrated that Darcy-flow based models for porous media are also applicable to thin technical porous layers.

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Page Count

188

Publisher

Logos Verlag Berlin GmbH

Published Date

ISBN 10

3832541977

ISBN 13

9783832541972

Simultaneous EEG and fMRI

Recording, Analysis, and Application

By: Markus Ullsperger,Stefan Debener

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Simultaneous EEG and fMRI

Recording, Analysis, and Application

By: Markus Ullsperger,Stefan Debener

One of the major challenges in science is to study and understand the human brain. Numerous methods examining different aspects of brain functions have been developed and employed. To study systemic interactions brain networks in vivo, non-invasive methods such as electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) have been used with great success. However, each of these methods can map only certain, quite selective aspects of brain function while missing others; and the inferences on neuronal processes and information flow are often rather indirect. To overcome these shortcomings of single methods, researchers have attempted to combine methods in order to make optimal use of their advantages while compensating their disadvantages. Hence, it is not surprising that soon after the introduction of fMRI as a neuroimaging method the possibilities of combinations with EEG have been explored. This book is intended to aid researchers who plan to set up a simultaneous EEG-fMRI laboratory and those who are interested in integrating electrophysiological and hemodynamic data. As will be obvious from the different chapters, this is a dynamically developing field in which several approaches are being tested, validated and compared. Currently, there is no one best solution for all problems available, but many promising techniques are emerging. This book shall give a comprehensive overview of these techniques. In addition, it points to open questions and directions for future research.

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Page Count

336

Publisher

Oxford University Press

Published Date

ISBN 10

0190451777

ISBN 13

9780190451776

Polysaccharide Based Supercapacitors

By: Soon Yee Liew,Wim Thielemans,Stefan Freunberger,Stefan Spirk

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Polysaccharide Based Supercapacitors

By: Soon Yee Liew,Wim Thielemans,Stefan Freunberger,Stefan Spirk

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Solve jigsaw puzzle

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Springer

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ISBN 10

3319507540

ISBN 13

9783319507545

Book's by Stefan Freunberger

Polysaccharide Based Supercapacitors

Polysaccharide Based Supercapacitors

Polysaccharides as Battery Components

Polysaccharides as Battery Components

Human Information Processing in Speech Quality Assessment

Human Information Processing in Speech Quality Assessment

Transport interactions between gas and water in thin hydrophobic porous layers

Transport interactions between gas and water in thin hydrophobic porous layers

Simultaneous EEG and fMRI

Simultaneous EEG and fMRI

Polysaccharide Based Supercapacitors

Polysaccharide Based Supercapacitors

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