Critically examining the discourse of Indo-European scholarship over the past two hundred years, Aryan Idols demonstrates how the interconnected concepts of “Indo-European” and “Aryan” as ethnic categories have been shaped by, and used for, various ideologies. Stefan Arvidsson traces the evolution of the Aryan idea through the nineteenth century—from its roots in Bible-based classifications and William Jones’s discovery of commonalities among Sanskrit, Latin, and Greek to its use by scholars in fields such as archaeology, anthropology, folklore, comparative religion, and history. Along the way, Arvidsson maps out the changing ways in which Aryans were imagined and relates such shifts to social, historical, and political processes. Considering the developments of the twentieth century, Arvidsson focuses on the adoption of Indo-European scholarship (or pseudoscholarship) by the Nazis and by Fascist Catholics. A wide-ranging discussion of the intellectual history of the past two centuries, Aryan Idols links the pervasive idea of the Indo-European people to major scientific, philosophical, and political developments of the times, while raising important questions about the nature of scholarship as well.
IMPACT (Interweaving Mathematics Pedagogy and Content for Teaching) is an exciting new series of texts for teacher education which aims to advance the learning and teaching of mathematics by integrating mathematics content with the broader research and theoretical base of mathematics education. The Learning and Teaching of Geometry in Secondary Schools reviews past and present research on the teaching and learning of geometry in secondary schools and proposes an approach for design research on secondary geometry instruction. Areas covered include: teaching and learning secondary geometry through history; the representations of geometric figures; students’ cognition in geometry; teacher knowledge, practice and, beliefs; teaching strategies, instructional improvement, and classroom interventions; research designs and problems for secondary geometry. Drawing on a team of international authors, this new text will be essential reading for experienced teachers of mathematics, graduate students, curriculum developers, researchers, and all those interested in exploring students’ study of geometry in secondary schools.
Aust presents the definitive account of the RAF, capturing a highly complex story both accurately and colorfully. Much new information has surfaced since the mass suicide of the Groups' leaders in the 1980s. Some RAF members have come forward to testify in new investigations and formerly classified Stasi documents have been made public since the fall of the Berlin Wall, all contributing to a fuller picture of the RAF and the events surrounding their demise. Aust ranges from the group's creation in 1970 to their breakup in 1998, incorporating all of the new information.
Inhaltsangabe:Abstract: The ultimate miniaturization of optical devices requires structures that guide electromagnetic energy with a lateral confinement below the diffraction limit of light. In this thesis, the possibility of employing plasmon-polariton excitations in plasmon waveguides consisting of closely spaced metal nanoclusters for this purpose is examined. The feasibility of energy transport with mode sizes below the diffraction limit of visible light over distances of several hundred nanometers is demonstrated. As a macroscopic analogue to plasmon waveguides, the transport of electromagnetic energy in the microwave regime along closely spaced centimeter-scale metal rods is examined. Full-field electrodynamic simulations show that information transport occurs at a group velocity of 0.65c for fabricated structures consisting of copper rods excited at 8 GHz. A variety of passive routing structures and an all-optical modulator are demonstrated. The possibility of guiding electromagnetic energy at visible frequencies with mode sizes below the diffraction limit using plasmon waveguides is analyzed using a point-dipole model and finite-difference time-domain simulations. It is shown that energy transport occurs via near-field coupling between metal nanoparticles, which leads to coherent propagation of energy. For spherical gold particles in air, group velocities up to 0.06c are demonstrated, and a change in particle shape to spheroidal particles shows up to a threefold increase in group velocity. Pulses with transverse polarization are shown to propagate with negative phase velocities antiparallel to the energy flow. Plasmon waveguides consisting of gold and silver nanoparticles were fabricated using electron beam lithography. The key parameters that govern the energy transport are determined for various interparticle spacings and particle chain lengths using far-field measurements of the collective plasmon modes. Spherical gold nanoparticles with a diameter of 50 nm and an interparticle spacing of 75 nm show an energy attenuation of 6 dB/30 nm. This loss can be reduced by one order of magnitude by a geometry change to spheroidal particles. Using the tip of a near-field optical microscope as a local excitation source and fluorescent nanospheres as detectors, experimental evidence for energy transport over a distance of 0.5 μm is presented for plasmon waveguides consisting of silver rods with a 3:1 aspect ratio. Inhaltsverzeichnis:Table of [...]
How is innovative architecture created? How can efficient synergies between planners and manufacturers be achieved? And how does an enterprise such as seele, with its proven high-level qualifications in the area of steel and glass, respond to planners' design ideas? These are just some of the questions answered in Innovative Design + Construction, the new publication in the DETAILdevelopment series. Using prestigious international projects as examples, the book explains the working philosophy and approach of the seele company, which stands for innovation in construction and customised solutions using the materials of glass, steel, aluminium and membranes like few other companies.
European Climate Vulnerabilities and Adaptation: A Spatial Planning Perspective analyses the impacts climate change might have on regions and their local economies. Regions clearly differ in view of the complex patterns of climate change impact, but also regarding the given vulnerability and coping capacity. Impacts of climate change can have a marked effect on the functioning of regions and sectors of the society, if not properly addressed. Readiness to adapt to the impacts and lasting changes counts towards vulnerability of the regions. The book builds upon the findings of a project conducted under the European observation network for territorial development and cohesion (ESPON), The ESPON Climate project. Following the stipulations of the ESPON programme and the tender for this project the territorial focus is the raison d’être and methodological core of the project as a whole and its various research actions: The outcomes of each action will be focused on what impacts global climate change will have for the different European regions and how the regions can cope with the projected impacts in order to become less vulnerable to climate change. This book: Provides a comprehensive analysis of climate change impacts on 29 European regions and their local economies Takes an interdisciplinary approach dealing with the physical, social, economic, environmental, cultural and institutional aspects of climate change vulnerability and the consequences for spatial planning Builds on the findings of the ESPON Climate project with a policy focused approach Is in full colour throughout with a broad range of case studies
Infrared laser absorption spectroscopy (IRLAS) employing both tuneable diode and quantum cascade lasers (TDLs, QCLs) has been applied with both high sensitivity and high time resolution to plasma diagnostics and trace gas measurements. TDLAS combined with a conventional White type multiple pass cell was used to detect up to 13 constituent molecular species in low pressure Ar/H2/N2/O2 and Ar/CH4/N2/O2 microwave discharges, among them the main products such as H2O, NH3, NO and CO, HCN respectively. The hydroxyl radical has been measured in the mid infrared (MIR) spectral range in-situ in both plasmas yielding number densities of between 1011 ... 1012 cm-3. Strong indications of surface dominated formation of either NH3 or N2O and NO were found in the H2-N2-O2 system. In methane containing plasmas a transition between deposition and etching conditions and generally an incomplete oxidation of the precursor were observed. The application of QCLs for IRLAS under low pressure conditions employing the most common tuning approaches has been investigated in detail. A new method of analysing absorption features quantitatively when the rapid passage effect is present is proposed. If power saturation is negligible, integrating the undisturbed half of the line profile yields accurate number densities without calibrating the system. By means of a time resolved analysis of individual chirped QCL pulses the main reasons for increased effective laser line widths could be identified. Apart from the well-known frequency down chirp non-linear absorption phenomena and bandwidth limitations of the detection system may significantly degrade the performance and accuracy of inter pulse spectrometers. The minimum analogue bandwidth of the entire system should normally not fall below 250 MHz. QCLAS using pulsed lasers has been used for highly time resolved measurements in reactive plasmas for the first time enabling a time resolution down to about 100 ns to be achieved. A temperature increase of typically less than 50 K has been established for pulsed DC discharges containing Ar/N2 and traces of NO. The main NO production and depletion reactions have been identified from a comparison of model calculations and time resolved measurements in plasma pulses of up to 100 ms. Considerable NO struction is observed after 5 ... 10 ms due to the impact of N atoms. Finally, thermoelectrically cooled pulsed and continuous wave (cw) QCLs have been employed for high finesse cavity absorption spectroscopy in the MIR. Cavity ring down spectroscopy (CRDS) has been performed with pulsed QCLs and was found to be limited by the intrinsic frequency chirp of the laser suppressing an efficient intensity build-up inside the cavity. Consequently the accuracy and advantage of an absolute internal absorption calibration is not achievable. A room temperature cw QCL was used in a complementary cavity enhanced absorption spectroscopy (CEAS) configuration which was equipped with different cavities of up to 1.3 m length. This spectrometer yielded path lengths of up to 4 km and a noise equivalent absorption down to 4 x 10-8 cm-1Hz-1/2. The corresponding molecular concentration detection limit (e.g. for CH4, N2O and C2H2 at 1303 cm-1/7.66 Aem) was generally below 1 x 1010 cm-3 for 1 s integration times and one order of magnitude less for 30 s integration times. The main limiting factor for achieving even higher sensitivity is the residual mode noise of the cavity. Employing a 0.5 m long cavity the achieved sensitivity was good enough for the selective measurement of trace atmospheric constituents at 2.2 mbar.
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