Jan Friedrich

This book provides a comprehensive overview of statistical descriptions of turbulent flows. Its main objectives are to point out why ordinary perturbative treatments of the Navier–Stokes equation have been rather futile, and to present recent advances in non-perturbative treatments, e.g., the instanton method and a stochastic interpretation of turbulent energy transfer. After a brief introduction to the basic equations of turbulent fluid motion, the book outlines a probabilistic treatment of the Navier–Stokes equation and chiefly focuses on the emergence of a multi-point hierarchy and the notion of the closure problem of turbulence. Furthermore, empirically observed multiscaling features and their impact on possible closure methods are discussed, and each is put into the context of its original field of use, e.g., the renormalization group method is addressed in relation to the theory of critical phenomena. The intended readership consists of physicists and engineers who wantto get acquainted with the prevalent concepts and methods in this research area.

Hardly any other epoch in art history has been marked by as many profound changes as the Late Gothic was in the fifteenth century. Inspired by Netherlandish role models, depictions of light and shadow, body and space, became increasingly more realistic. Everyday life found entry into the arts. With the invention of printing, images and texts were distributed to an extent previously unheard of. Artists such as Nicolaus Gerhaert and Martin Schongauer became widely known and influenced the development of the visual arts throughout Europe and across all genres. Featuring a wide selection of works, the Staatliche Museen zu Berlin present the first extensive exhibition of Late Gothic art in the German-speaking regions. Its comparison and contrast of the various genres turns the catalogue into a handbook for the arts at the threshold of the modern era.

This book provides a comprehensive overview of statistical descriptions of turbulent flows. Its main objectives are to point out why ordinary perturbative treatments of the Navier–Stokes equation have been rather futile, and to present recent advances in non-perturbative treatments, e.g., the instanton method and a stochastic interpretation of turbulent energy transfer. After a brief introduction to the basic equations of turbulent fluid motion, the book outlines a probabilistic treatment of the Navier–Stokes equation and chiefly focuses on the emergence of a multi-point hierarchy and the notion of the closure problem of turbulence. Furthermore, empirically observed multiscaling features and their impact on possible closure methods are discussed, and each is put into the context of its original field of use, e.g., the renormalization group method is addressed in relation to the theory of critical phenomena. The intended readership consists of physicists and engineers who wantto get acquainted with the prevalent concepts and methods in this research area.

Dieses Buch stellt einen methodischen Leitfaden für Prozessingenieure, Berater, Methodenverantwortliche oder Assessoren bei der Anpassung und Einführung des V-Modell®XT zur Verfügung. Es erläutert alle wichtigen Anpassungsoptionen und Techniken, die Anwendern des V-Modell®XT im Rahmen von organisationsspezifischen Anpassungen zur Verfügung stehen. Zahlreiche Beispiele zeigen die praktische Anwendung einzelner Techniken. Weiterhin wird der gesamte Anpassungs- und Einführungsprozess, von der Konzeption bis hin zur Mitarbeiterschulung beschrieben.

Das V-Modell® XT ist das durch die Bundesverwaltung verpflichtend vorgeschriebene Vorgehensmodell für die Entwicklung von IT-Systemen. Das Buch bietet einen kompakten Einstieg in die neue Version 1.3 des Modells. Es behandelt die Änderungen gegenüber der Vorgängerversion, die wesentlichen Konzepte des V-Modell® XT und detailliert die Bereiche Projektmanagement und Qualitätssicherung. Best Practises und Hinweise zur Bewältigung typischer Aufgabenstellungen im V-Modell® XT runden das Buch ab.

Blickt man mit einem lachenden und einem weinenden Auge, oft sogar verschmitzt in den Alltag, die natürliche Umgebung und die kleinen Episoden im Leben, so trifft man in diesem Buch auf einen ähnlich in Gedichten und Kurzgeschichten erzählenden Autor, welche manchmal fast philosophisch oder satirisch aber auch tiefsinnig Momente des Lebens herausgreift und uns nahe bringt. Eine amüsante Lektüre, oft aber auch zum Nachdenken anregend.