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The Second World War, Vol. 3

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Book Series: Essential Histories ISBN: 9780203498828 9780415968478 9781135882587 9781135882570 9781135882532 Year: DOI: 10.4324/9780203498828 Language: English
Publisher: Taylor & Francis
Subject: Sociology --- History --- Social Sciences
Added to DOAB on : 2019-11-08 11:21:07
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This volume provides a comprehensive guide to three major theaters of combat: the Atlantic, the Mediterranean, and the Indian Ocean. The war at sea was a critical contest, as sea-lanes provided the logistical arteries for British and subsequent Allied armies fighting on the three continents of Africa, Asia, and Europe. Land forces ultimately won World War II, but the battles at sea fundamentally altered the balance of military power on the ground.

Keywords

royal --- navy --- merchant --- ships --- german --- scapa --- flow --- graf --- spee --- surface

Beitrag zur Effizienzsteigerung mobiler Arbeitsmaschinen: Entwicklung einer elektrohydraulischen Bedarfsstromsteuerung mit aufgeprägtem Volumenstrom

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Book Series: Karlsruher Schriftenreihe Fahrzeugsystemtechnik / Institut für Fahrzeugsystemtechnik ISSN: 18696058 ISBN: 9783731503392 Year: Volume: 32 Pages: 168 p. DOI: 10.5445/KSP/1000045508 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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The drive line of the working equipment of mobile machines is mainly composed of fluid power systems. Electro-hydraulic components facilitate the development of innovative Flow-on-Demand hydraulics. In these systems the oil flow of the pump is derived from the consumer requests and directly set in an open-loop control. Principle related power dissipation is reduced. Additionally, faster system response improves machine operability and ease of use.

Shallow turbulent wake flows: momentum and mass transfer due to large-scale coherent vortical structures

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Book Series: Dissertationsreihe am Institut für Hydromechanik der Universität Karlsruhe (TH) ISSN: 14394111 ISBN: 3937300635 Year: Volume: 2005,2 Pages: XXVI, 398 p. DOI: 10.5445/KSP/1000003453 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:01:59
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Shallow turbulent wake flows are generated by large obstacles - like islands or headlands - introduced to shallow turbulent open-channel flows. Large-scale quasi two-dimensional vortices may shed off from an obstacle, and advect downstream in a vertical shear flow with predominantly small-scale turbulence induced by bottom friction. Experimental, analytical, and numerical techniques are employed in the present study to characterize the mean flow and turbulence properties of shallow wakes; mechanisms of generation and decay of large-scale vortical structures are clarified, as is their influence on momentum and mass transport in shallow wakes; the global and local stability of shallow wakes is analyzed and evidenced from experimental data. Part I of this work covers non-intrusive optical measurement techniques especially adapted to investigate shallow shear flows. Flow velocities and mass concentrations are obtained (i) point-wise with high spatiotemporal resolution using a combinded LDV-LIF system, and (ii) field-wise using near-surface PIV and depth-averaged PCA systems with a coupling by phase-resolved averaging. Improved algorithms for the evaluation of mass concentrations are based on hydro-optical models of the underlying fluorescence and light attenuation processes. Part II addresses the time-mean description of shallow wake flows. The stochastic description of the turbulence fields displays a characteristic spectral distribution both of kinetic energy and of mass variance, which is partially consistent with the theory of unbounded 2D turbulence at large scales, and with the theory of homogeneous 3D turbulence at small scales. An integral wake model including the effect of bottom friction is derived analytically, and is validated by experimental data. The time-mean distributions of flow velocities and of mass concentration allow to identify wake near fields and far fields with specific asymptotic wake developments. Wake stability classes are associated with local stability regions suggested by linear stability analyses. Part III elaborates the structure and dynamics of quasi-periodic wake flows and the significance of large-scale eddies. This involves a structure identification scheme to educe individual vortices, and a phase-resolved averaging procedure to decompose the flow fields into large-scale coherent and small-scale turbulent parts. A Numerical Particle Tracking technique is employed to model the mass transport and to elucidate different diffusion and dispersion effects.

Enabling Positive Change. Flow and Complexity in Daily Experience

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ISBN: 9783110410242 9783110439472 Year: Pages: 210 DOI: 10.2478/9783110410242 Language: English
Publisher: De Gruyter
Subject: Psychology
Added to DOAB on : 2015-04-13 10:50:20
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Personal psychological growth: Why are some people able to promote their own psychological growth (bold tag) and change toward complexity while others not? Is it possible to propose simple methodologies and instruments that would allow selection of positive experiences and hence develop a stronger and richer Self? This book describes the way to promote and foster positive psychological growth in everyday life, through simple instruments accessible to anyone. Positive psychological experience: The focal point of the approach is the concept of Flow of Consciousness, an experience of subjective psychological wellbeing that nourishes and complexifies the Self. The authors propose a wide overview of positive psychological experience (bold tag) considering individual characteristics and experiences, as well as the influence of context, culture and social relationship, and the effects of the immersion in a globalized world, like the increasing daily use of mediated communication technologies. In the various chapters, this conceptual frame is declined in different areas of research, either consolidated ones or new fields. Self-development tips: In a fresh and engaging style, the book transports the readers in a world of situations and opportunities through which they can identify themselves in a positive and stable self-development (bold tag) process. In the first two chapters the authors describe the impact of positive psychological experience in social and individual life. In the following chapters the reader discovers, accompanied by the exposition of concrete research results, the specific characteristics that may promote flow experience in several field of experience: the use of communication technology; the experience of social-networks; clinical settings and Psychotherapy; the psychological relation with environment, politics and social participation, school, sports, family business, mentor's influence, and the perception of quality of life in daytime. Everyday opportunities: This opportunity of interacting with different and various kinds of experiences, that may appear dispersive, will on the contrary bring the reader - who may choose this book both for professional or personal reasons - to understand the concept of personal psychological growth in the wider and more concrete perspective, and to comprehend which personal skills he may bring into play in order to improve his personality and his daily experience.

Heat Transfer Processes in Oscillatory Flow Conditions

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ISBN: 9783038427094 9783038427100 Year: Pages: VI, 172 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Heat
Added to DOAB on : 2018-04-27 16:01:54
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Heat exchange processes in steady flows have been studied extensively over the last two hundred years, and are now a part of undergraduate syllabi in most engineering courses. However, heat transfer processes in oscillatory flow conditions are still not very well understood. Their importance is well recognized in applications including Stirling machines, thermoacoustic engines, and refrigerators or pulsed-tube coolers in cryogenics. Additionally, the enhancement of heat transfer by using oscillatory, and, in some cases, pulsating flows is important in many areas of mechanical and chemical engineering for the intensification of heat transfer processes and possible miniaturization of heat exchangers of the future.This Special Issue was intended as a dissemination platform for researchers working in the field to have an opportunity to consolidate recent advances in this important research area. All types of research approaches were invited, including experimental, theoretical, computational fluid dynamics (CFD), and their combinations, while the approaches could be either of a fundamental or applied nature. The guest editor and the editorial team of Applied Sciences hope that the readership will find the selection of ten articles presented here a useful contribution to the emerging field of heat transfer processes in oscillatory flow conditions.

Nuclear Thermal Hydraulic and Two-Phase Flow

Authors: --- --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889456123 Year: Pages: 120 DOI: 10.3389/978-2-88945-612-3 Language: English
Publisher: Frontiers Media SA
Subject: General and Civil Engineering
Added to DOAB on : 2019-01-23 14:53:43
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Nuclear energy is one of the most important clear energy and contributes more than 10% electric power to human society in the past decades of years. The nuclear thermal hydraulic and two-phase flow is one of the basic branches of nuclear technology and provides structure design and safety analysis to the nuclear power reactors. In the new century, the basic theoretical research of thermal hydraulic and two-phase flow, and innovative design for the next generation nuclear power plants (especially for the small modular reactor and molten salt reactor), along with other nuclear branches, constantly support the development of nuclear technology.

Simulation von Fahrspielen und Energieflüssen in Nahverkehrssystemen

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Book Series: Karlsruher Schriftenreihe Fahrzeugsystemtechnik / Institut für Fahrzeugsystemtechnik ISSN: 18696058 ISBN: 9783731507406 Year: Volume: 66 Pages: XXX, 323 p. DOI: 10.5445/KSP/1000077162 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-28 18:37:01
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For ecological und economic reasons, special attention is paid to the energy balance of rail-bound, local, direct current-based transport systems. With the tram and urban railway network of Karlsruhe being used as an example, 16 simulation scenarios with different measures for energy optimization are analysed in a coupled computation of driving cycles and energy flows.

High accuracy determination of skin friction differences in an air channel flow based on pressure drop measurements

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Book Series: Schriftenreihe des Instituts für Strömungsmechanik, Karlsruher Institut für Technologie ISSN: 21998868 ISBN: 9783731505020 Year: Volume: 2 Pages: VIII, 222 p. DOI: 10.5445/KSP/1000053260 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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The present work delivers a versatile, accurate and reliable wind tunnel facility that is particularly developed to test different flow control techniques for drag reduction in precisely adjustable test conditions. Skin friction changes of 0.4% are resolved, which is comparable to the most accurate reported studies in liquids. this high accuracy is verified through a comprehensive uncertainty analysis. Subsequently, various passive and active flow control strategies are investigated.

Grundlegende Aspekte des 2K-Metallpulverspritzgießens

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Book Series: Schriftenreihe des Instituts für Angewandte Materialien, Karlsruher Institut für Technologie ISSN: 21929963 ISBN: 9783731502173 Year: Volume: 36 Pages: III, 138 p. DOI: 10.5445/KSP/1000040997 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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An important requirement for the combination of two materials in order to get a low stress and low warpage, crack-free composite component is a timely synchronized sintering behavior of both components. The aim of this work was to analyze the effect of the particle size distribution on the sintering behavior and the resulting consequences of the particle size change for the flow properties during injection molding.

Modellunterstützte Beurteilung der Verkehrsqualität auf Netzabschnitten von Bundesautobahnen

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Book Series: Schriftenreihe des Instituts für Verkehrswesen, Karlsruher Institut für Technologie ISSN: 03415503 ISBN: 9783731508687 Year: Volume: 73 Pages: XVII, 173 p. DOI: 10.5445/KSP/1000087900 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:01:58
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An efficient highway capacity design is becoming an increasingly important topic, thanks to recurring congestions and unreliable travel times in the German highway network. This work provides a new methodology for the analysis of oversaturated freeway facilities. A Cell Transmission Model was used as an underlying traffic flow model for modeling oversaturated freeway facilities and tailor-fitted to represent the HBS manual faithfully.

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