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Constructivist Oriented Lessons
55,95 € *
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The study presented in this book is embedded within the "Video Study of Physics Lessons" conducted by the Institute for Science Education at the University of Kiel. The study aims at analysing whether physics lessons taught by a sample of German physics teachers meet key characteristics of constructivist learning environments and constructivist teaching sequences as identified in the literature. Classroom learning environments are assessed using a category system called the Constructivist Oriented Science Classrooms (COSC), while teaching sequences are assessed using a category system called the Constructivist Teaching Sequences (CTS). This book presents the results of the analyses as well as the correlations between the appearances of the characteristics of constructivist-oriented lessons and students' achievement and students' interest.

Anbieter: Dodax
Stand: 04.12.2020
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Milk Proteins
133,86 € *
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This book reviews the state of knowledge and progress of research on food proteins, and in particular, milk proteins. Its basis is the Symposium on Milk Proteins that was held at the Federal Dairy Research Centre in Kiel, FRG, in June, 1988. Scien tists from around the world attended and addressed pure, as well as applied fields of protein research and technology. This book is divided into five sections, each adapted from the symposium's invited lectures, short communications, and poster presentations. New criteria for the "bio logical value" of dietary proteins and their relationships are considered according to: - Milk Proteins and Nitrogen Equilibrium - Milk Proteins and Ligands - Milk Proteins: Structural and Genetic Aspects - Milk Proteins: Technological and Functional Aspects - Milk Proteins and Clinical Nutrition Generally, different dietary proteins are classified according to their "biological value," i.e., their capacity to cause different retention of nitrogen in the body. But we think there are other intriguing leads worth studying that may help to identify which dietary proteins are best recommended for specific dietary situations or clini cal conditions. In addition, we have taken into consideration new fields such as attempts to determine the three-dimensional structure of proteins using two-dimensional NMR spectroscopy, and the application of genetic engineering to the lactating cell. In other words, we are on the way to the transgenic cow with customized milk constituents and composition.

Anbieter: Dodax
Stand: 04.12.2020
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GPR / Seismic Tomography for Delineating Subsur...
79,00 € *
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The aim of the present work is to develop an approach for detecting and mapping different types of subsurface anomalous zones using tomographic processing techniques. Tomography is applied to process seismic refraction and Ground Penetrating Radar (GPR) data. We developed a new tomography technique depending on acquiring the GPR or seismic data from surface survey, where both sources and receivers are located on the earth s surface. Three synthetic seismic models and two sets of field data are discussed to test the proposed seismic refraction tomography technique. Due to the similarities between GPR and seismic data, the adopted tomography technique is applied to GPR data. Three GPR tomography laboratory experiments are acquired in the laboratory of Kiel University, Germany. The inversion of GPR data using the adopted technique give satisfactory results on the lateral extension of the anomalies as well as GPR velocity. One GPR tomography field test is acquired in the botanic garden of Kiel University, Kiel, Germany. In this data the root system of a tree and zone of high water content, due to previous excavation processes could be marked on the inverted tomogram map.

Anbieter: Dodax
Stand: 04.12.2020
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Milk Proteins
121,69 € *
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This book reviews the state of knowledge and progress of research on food proteins, and in particular, milk proteins. Its basis is the Symposium on Milk Proteins that was held at the Federal Dairy Research Centre in Kiel, FRG, in June, 1988. Scien tists from around the world attended and addressed pure, as well as applied fields of protein research and technology. This book is divided into five sections, each adapted from the symposium's invited lectures, short communications, and poster presentations. New criteria for the "bio logical value" of dietary proteins and their relationships are considered according to: - Milk Proteins and Nitrogen Equilibrium - Milk Proteins and Ligands - Milk Proteins: Structural and Genetic Aspects - Milk Proteins: Technological and Functional Aspects - Milk Proteins and Clinical Nutrition Generally, different dietary proteins are classified according to their "biological value," i.e., their capacity to cause different retention of nitrogen in the body. But we think there are other intriguing leads worth studying that may help to identify which dietary proteins are best recommended for specific dietary situations or clini cal conditions. In addition, we have taken into consideration new fields such as attempts to determine the three-dimensional structure of proteins using two-dimensional NMR spectroscopy, and the application of genetic engineering to the lactating cell. In other words, we are on the way to the transgenic cow with customized milk constituents and composition.

Anbieter: Dodax
Stand: 04.12.2020
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Integrated Coastal Zone Management
68,90 CHF *
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This book gives a brief but comprehensive overview of Integrated Coastal Zone Management. Using water management as an example, it enables readers to understand different interests and requirements. It is intended as a textbook for students but can also be used by professionals in administration as well as project management and planning. By summarizing hydrological aspects it clarifies the challenges in water management (e. g. coastal protection, drainage and river management). Further, it presents the principles and methods for integration and good, collaborative processes taking into account the interests and requirements at coastal zones. The book focuses on the status quo in Europe, with examples from The Netherlands, Germany and Spain, and offers up-to-date insights into the state of the art in the United States of America or Australia. The author also takes a fresh look at a number of topics, such as historical reflections.   Contents The Coast – Characteristics, Living, Working Historical Annotations and European Developments Basics of Integrated Coastal Zone Management Hydrology of Coastal Regions Sectorial Descriptions Integrated Management Approaches Methodologies of Integration Fictitious Case Studies Audience Students in programs related to coastal issues: civil engineering hydraulics, geosciences, limnology, hydrology, marine biosciences, environmental law, social sciences. Professionals in administration as well as policy and pressure groups. About the Author Dr. Frank Ahlhorn completed doctoral degree at the University of Kiel and is head of Küste und Raum - Ahlhorn & Meyerdirks GbR, a company involved in various aspects of coastal zone management.

Anbieter: Orell Fuessli CH
Stand: 04.12.2020
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Digital Enhancement of EEG/MEG Signals
57,90 CHF *
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Electroencephalography (EEG) and Magnetoencephalography (MEG) recordings are commonly used for analyzing the brain. However, in most cases, the recordings not only contain brain waves, but also artifacts of physiological (ocular, muscle, ECG artifacts) or technical (electrode popping, power-line) origins, and noise from different sources. The main aim of the work described in this thesis is the noise reduction and artifact suppression from EEG and MEG signals. Different techniques for artifact suppression have been used: A Low-Pass Filter (LPF), an instantaneous Independent Component Analysis (ICA) algorithm, a combination of ICA and LPF, a combination of ICA and State-Space Modeling (SSM), a combination of ICA and Wiener filters, and a hybrid filter (i.e., a filter that works in the time- and frequency-domains). These techniques have been tested only offline in the present work. Additionally, two artifact suppression methods that could work either offline or in real-time have been tested in real-time. The first one is a recent approach used for signal enhancement, called Empirical Mode Decomposition (EMD). This method is employed in this work for denoising, for detrending, and for suppressing the muscle artifacts from EEG signals. The second method is an algorithm here called Classification-based Signal Enhancement (CBSE). It was also used to suppress muscle artifacts in EEG signals, in real-time, using Wiener filters for signal enhancement. In order to use any artifact suppression technique, the artifacts to be removed have to be previously identified. If the artifact suppression is done offline, the detection can be carried out by visual inspection of the data by an expert, or in an automatic way. On the other hand, if the suppression of artifacts has to be done in real-time, the artifacts have to be detected automatically. A detection technique is proposed in the present work. First, different features are extracted from the independent components, and then a threshold-based classification is performed to determine which components are contaminated, what kind of artifacts they contain, and how the suppression of the artifacts is realized. This method was tested in an offline manner in this thesis. The effectiveness of the proposed artifact suppression techniques was demonstrated by application to either “semi-simulated” EEG signals artificially contaminated with artifacts, or to real EEG/MEG data from a healthy subject or a patient suffering from epilepsy (inherently contaminated with different kinds of artifacts). It is shown by visual inspection and in a quantitative manner that, after applying the different techniques, the EEG/MEG signals are enhanced. To reduce the noise, an equalizer and a Wiener filter have been used. The signals employed for this purpose correspond to those from the newly developed magnetoelectric (ME) sensors at Kiel University.

Anbieter: Orell Fuessli CH
Stand: 04.12.2020
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Wasserstoffdiffusion in einem höherfesten Stahl...
5,40 CHF *
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Forschungsarbeit aus dem Jahr 1998 im Fachbereich Chemie - Materialchemie, Werkstoffchemie, Note: 1, Christian-Albrechts-Universität Kiel (Institut für Werkstoffkunde; GKSS Forschungszentrum GmbH), Sprache: Deutsch, Abstract: The influence of mechanical strain on the hydrogen diffusion in a structural steel (FeE 690T) was investigated using the electrochemical permeation technique. The method was applied without any kind of coating, but surface conditions were strictly controlled. The deformation was introduced either by cold working or by 'in-situ' tensile straining. The hydrogen diffusion turned out to be highly dependent on the degree of deformation. Above yield stress an increasing plastic deformation led to a decrease of the apparent diffusion, whereas above 50% deformation the diffusibility remained fairly constant. Voids and dislocations, which knowingly act as 'sinks' for hydrogen, are considered to be responsible for this observations. The trapping energy was estimated to be -47 kJ/molH. The method by which the material was deformed had no visible effect on the hydrogen permeation.

Anbieter: Orell Fuessli CH
Stand: 04.12.2020
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Integrated Coastal Zone Management
49,99 € *
ggf. zzgl. Versand

This book gives a brief but comprehensive overview of Integrated Coastal Zone Management. Using water management as an example, it enables readers to understand different interests and requirements. It is intended as a textbook for students but can also be used by professionals in administration as well as project management and planning. By summarizing hydrological aspects it clarifies the challenges in water management (e. g. coastal protection, drainage and river management). Further, it presents the principles and methods for integration and good, collaborative processes taking into account the interests and requirements at coastal zones. The book focuses on the status quo in Europe, with examples from The Netherlands, Germany and Spain, and offers up-to-date insights into the state of the art in the United States of America or Australia. The author also takes a fresh look at a number of topics, such as historical reflections.   Contents The Coast – Characteristics, Living, Working Historical Annotations and European Developments Basics of Integrated Coastal Zone Management Hydrology of Coastal Regions Sectorial Descriptions Integrated Management Approaches Methodologies of Integration Fictitious Case Studies Audience Students in programs related to coastal issues: civil engineering hydraulics, geosciences, limnology, hydrology, marine biosciences, environmental law, social sciences. Professionals in administration as well as policy and pressure groups. About the Author Dr. Frank Ahlhorn completed doctoral degree at the University of Kiel and is head of Küste und Raum - Ahlhorn & Meyerdirks GbR, a company involved in various aspects of coastal zone management.

Anbieter: Thalia AT
Stand: 04.12.2020
Zum Angebot
Digital Enhancement of EEG/MEG Signals
48,80 € *
ggf. zzgl. Versand

Electroencephalography (EEG) and Magnetoencephalography (MEG) recordings are commonly used for analyzing the brain. However, in most cases, the recordings not only contain brain waves, but also artifacts of physiological (ocular, muscle, ECG artifacts) or technical (electrode popping, power-line) origins, and noise from different sources. The main aim of the work described in this thesis is the noise reduction and artifact suppression from EEG and MEG signals. Different techniques for artifact suppression have been used: A Low-Pass Filter (LPF), an instantaneous Independent Component Analysis (ICA) algorithm, a combination of ICA and LPF, a combination of ICA and State-Space Modeling (SSM), a combination of ICA and Wiener filters, and a hybrid filter (i.e., a filter that works in the time- and frequency-domains). These techniques have been tested only offline in the present work. Additionally, two artifact suppression methods that could work either offline or in real-time have been tested in real-time. The first one is a recent approach used for signal enhancement, called Empirical Mode Decomposition (EMD). This method is employed in this work for denoising, for detrending, and for suppressing the muscle artifacts from EEG signals. The second method is an algorithm here called Classification-based Signal Enhancement (CBSE). It was also used to suppress muscle artifacts in EEG signals, in real-time, using Wiener filters for signal enhancement. In order to use any artifact suppression technique, the artifacts to be removed have to be previously identified. If the artifact suppression is done offline, the detection can be carried out by visual inspection of the data by an expert, or in an automatic way. On the other hand, if the suppression of artifacts has to be done in real-time, the artifacts have to be detected automatically. A detection technique is proposed in the present work. First, different features are extracted from the independent components, and then a threshold-based classification is performed to determine which components are contaminated, what kind of artifacts they contain, and how the suppression of the artifacts is realized. This method was tested in an offline manner in this thesis. The effectiveness of the proposed artifact suppression techniques was demonstrated by application to either “semi-simulated” EEG signals artificially contaminated with artifacts, or to real EEG/MEG data from a healthy subject or a patient suffering from epilepsy (inherently contaminated with different kinds of artifacts). It is shown by visual inspection and in a quantitative manner that, after applying the different techniques, the EEG/MEG signals are enhanced. To reduce the noise, an equalizer and a Wiener filter have been used. The signals employed for this purpose correspond to those from the newly developed magnetoelectric (ME) sensors at Kiel University.

Anbieter: Thalia AT
Stand: 04.12.2020
Zum Angebot