Christian Thomsen – författare

The present book's subject is multidimensional data models and data modeling concepts as they are applied in real data warehouses. The book aims to present the most important concepts within this subject in a precise and understandable manner. The book's coverage of fundamental concepts includes data cubes and their elements, such as dimensions, facts, and measures and their representation in a relational setting; it includes architecture-related concepts; and it includes the querying of multidimensional databases. The book also covers advanced multidimensional concepts that are considered to be particularly important. This coverage includes advanced dimension-related concepts such as slowly changing dimensions, degenerate and junk dimensions, outriggers, parent-child hierarchies, and unbalanced, non-covering, and non-strict hierarchies. The book offers a principled overview of key implementation techniques that are particularly important to multidimensional databases, including materialized views, bitmap indices, join indices, and star join processing. The book ends with a chapter that presents the literature on which the book is based and offers further readings for those readers who wish to engage in more in-depth study of specific aspects of the book's subject. Table of Contents: Introduction / Fundamental Concepts / Advanced Concepts / Implementation Issues / Further Readings

The present book''s subject is multidimensional data models and data modeling concepts as they are applied in real data warehouses. The book aims to present the most important concepts within this subject in a precise and understandable manner. The book''s coverage of fundamental concepts includes data cubes and their elements, such as dimensions, facts, and measures and their representation in a relational setting; it includes architecture-related concepts; and it includes the querying of multidimensional databases. The book also covers advanced multidimensional concepts that are considered to be particularly important. This coverage includes advanced dimension-related concepts such as slowly changing dimensions, degenerate and junk dimensions, outriggers, parent-child hierarchies, and unbalanced, non-covering, and non-strict hierarchies. The book offers a principled overview of key implementation techniques that are particularly important to multidimensional databases, including materialized views, bitmap indices, join indices, and star join processing. The book ends with a chapter that presents the literature on which the book is based and offers further readings for those readers who wish to engage in more in-depth study of specific aspects of the book''s subject. Table of Contents: Introduction / Fundamental Concepts / Advanced Concepts / Implementation Issues / Further Readings

Die körperliche Untersuchung ist die Basis jeder Diagnose. 170 aussagekräftige zweifarbige Zeichnungen illustrieren die notwendigen Untersuchungstechniken und -schritte und bereiten mit dazugehörigen prägnanten Texten optimal auf den Berufsalltag vor. Darüber hinaus definiert der Autor klar den Unterschied zwischen Symptom und Diagnose und verweist immer deutlich auf Normalzustand vs. pathologischen Zustand eines Patienten. Ein gesondertes Kapitel stellt außerdem die Geschichte der körperlichen Untersuchung dar. In die 2. Auflage wurden zudem wichtige orthopädische Untersuchungen und das Vorgehen bei vital bedrohlichen Zuständen aufgenommen.

Die körperliche Untersuchung ist die Basis jeder Diagnose. 170 aussagekräftige zweifarbige Zeichnungen illustrieren die notwendigen Untersuchungstechniken und -schritte und bereiten mit dazugehörigen prägnanten Texten optimal auf den Berufsalltag vor. Darüber hinaus definiert der Autor klar den Unterschied zwischen Symptom und Diagnose und verweist immer deutlich auf Normalzustand vs. pathologischen Zustand eines Patienten. Ein gesondertes Kapitel stellt außerdem die Geschichte der körperlichen Untersuchung dar. In die 2. Auflage wurden zudem wichtige orthopädische Untersuchungen und das Vorgehen bei vital bedrohlichen Zuständen aufgenommen.

Die körperliche Untersuchung ist die Basis jeder Diagnose. 170 aussagekräftige zweifarbige Zeichnungen illustrieren die notwendigen Untersuchungstechniken und -schritte und bereiten mit dazugehörigen prägnanten Texten optimal auf den Berufsalltag vor. Darüber hinaus definiert der Autor klar den Unterschied zwischen Symptom und Diagnose und verweist immer deutlich auf Normalzustand vs. pathologischen Zustand eines Patienten. Ein gesondertes Kapitel stellt außerdem die Geschichte der körperlichen Untersuchung dar. In die 2. Auflage wurden zudem wichtige orthopädische Untersuchungen und das Vorgehen bei vital bedrohlichen Zuständen aufgenommen.

Carbon nanotubes are exceptionally interesting from a fundamental research point of view. Many concepts of one-dimensional physics have been verified experimentally such as electron and phonon confinement or the one-dimensional singularities in the density of states; other 1D signatures are still under debate, such as Luttinger-liquid behavior. Carbon nanotubes are chemically stable, mechanically very strong, and conduct electricity. For this reason, they open up new perspectives for various applications, such as nano-transistors in circuits, field-emission displays, artificial muscles, or added reinforcements in alloys. This text is an introduction to the physical concepts needed for investigating carbon nanotubes and other one-dimensional solid-state systems. Written for a wide scientific readership, each chapter consists of an instructive approach to the topic and sustainable ideas for solutions. The former is generally comprehensible for physicists and chemists, while the latter enable the reader to work towards the state of the art in that area. The book gives for the first time a combined theoretical and experimental description of topics like luminescence of carbon nanotubes, Raman scattering, or transport measurements. The theoretical concepts discussed range from the tight-binding approximation, which can be followed by pencil and paper, to first-principles simulations. We emphasize a comprehensive theoretical and experimental understanding of carbon nanotubes including - general concepts for one-dimensional systems- an introduction to the symmetry of nanotubes- textbook models of nanotubes as narrow cylinders- a combination of ab-initio calculations and experiments- luminescence excitation spectroscopy linked to Raman spectroscopy- an introduction to the 1D-transport properties of nanotubes- effects of bundling on the electronic and vibrational properties and- resonance Raman scattering in nanotubes.

Carbon nanotubes are exceptionally interesting from a fundamental research point of view. Many concepts of one-dimensional physics have been verified experimentally such as electron and phonon confinement or the one-dimensional singularities in the density of states; other 1D signatures are still under debate, such as Luttinger-liquid behavior. Carbon nanotubes are chemically stable, mechanically very strong, and conduct electricity. For this reason, they open up new perspectives for various applications, such as nano-transistors in circuits, field-emission displays, artificial muscles, or added reinforcements in alloys. This text is an introduction to the physical concepts needed for investigating carbon nanotubes and other one-dimensional solid-state systems. Written for a wide scientific readership, each chapter consists of an instructive approach to the topic and sustainable ideas for solutions. The former is generally comprehensible for physicists and chemists, while the latter enable the reader to work towards the state of the art in that area. The book gives for the first time a combined theoretical and experimental description of topics like luminescence of carbon nanotubes, Raman scattering, or transport measurements. The theoretical concepts discussed range from the tight-binding approximation, which can be followed by pencil and paper, to first-principles simulations. We emphasize a comprehensive theoretical and experimental understanding of carbon nanotubes including - general concepts for one-dimensional systems - an introduction to the symmetry of nanotubes - textbook models of nanotubes as narrow cylinders - a combination of ab-initio calculations and experiments - luminescence excitation spectroscopy linked to Raman spectroscopy - an introduction to the 1D-transport properties of nanotubes - effects of bundling on the electronic and vibrational properties and - resonance Raman scattering in nanotubes.

Alles ist Physik und natürlich müssen sich angehende Ingenieure damit beschäftigen. Die Physik fällt Ihnen schwer? Ihnen fehlen die mathematischen Grundlagen? Keine Panik! Dieses Buch wird Ihnen helfen. Es enthält alles, was Sie über Mechanik, Thermodynamik, Elektrizität, Magnetismus, Optik, Atom-, Kern- und Festkörperphysik wissen sollten, um im Studium zu bestehen - und die mathematischen Grundlagen dazu. Schritt für Schritt hilft Ihnen dieses Buch über die mathematischen und physikalischen Hürden. Da Ihnen zahlreiche Beispiele vorgerechnet werden, werden Sie sich in der Welt der Physik bald immer sicherer fühlen.