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Flight mechanics and flight control for a multibody aircraft
Aircraft operating as so-called High Altitude Platform Systems (HAPS) have been considered as a complementary technology to satellites since several years. These aircraft can be used for similar communication and monitoring tasks while operating at a fraction of the cost. Such concepts have been successfully tested. Those include the AeroVironment Helios and the Airbus Zephyr, with an endurance of nearly 624 hours (26 days). All these HAPS aircraft have a high-aspect-ratio wing using lightweight construction. In gusty atmosphere, this results in high bending moments and high structural loads, which can lead to overloads. Aircraft crashes, for example from Google’s Solara 50 or Facebook’s...
Investigations on the current and future use of radio frequency allocations for small satellite operations
Global radio frequency spectrum use for satellite communication is a present-day challenge that has been aggravated by the increased launch of small satellites during the past 15 years. This thesis aims to examine both regulatory and technical aspects of spectrum use. The focus of this examination is on frequency bands that are commonly used by small satellites and on those bands that might be applicable for future use. The thesis content is subdivided into three parts. The first part presents the needed background on small satellites as well as the regulatory environment for small satellites. The second part gives insight into the results of a theoretical assessment of current and future sm...
Contributions to on-board navigation on 1U CubeSats
This thesis investigates the use of GNSS receivers on 1U CubeSats, using the example of BEESAT-4 and BEESAT-9. The integration of such a device on satellites enables highly precise time synchronization, position acquisition and orbit determination and prediction The application fields that depend on an accurate attitude control and orbit determination system and can also be processed by CubeSats are highlighted. Therefore the state of the art of GNSS receivers is described, which are suitable for the use on satellites and could be integrated into 1U CubeSats. Further on it is investigated which subsystems of a small satellite are particularly affected and what the special challenges are to r...
Peru
'The Rough Guide to Peru' is a comprehensive handbook for the independent traveller that provides entertaining coverage of all the sights, detailed listings of the best places to stay and eat, and practical advice for outdoor pursuits.
The Oxford Handbook of Mission Studies
The Oxford Handbook of Mission Studies represents more than a century of scholarship related to the theology, history, and methodology of the propagation of Christian faith and the engagement of Christians with cultures, religions, and societies worldwide. It contains more than 40 articles by experts from different disciplinary and ecclesial perspectives, who are from all continents. It not only offers a broad overview of key approaches and issues in mission studies but it also highlights current trends and suggests future developments. The Handbook builds on renewed interest in mission studies this century generated by recent key statements on mission from ecumenical, evangelical, Catholic,...
Theater. 4 bde
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The Demure Miss Manning
"Category: Historical"--Page 4 of cover.
Aztecs, Moors, and Christians
In villages and towns across Spain and its former New World colonies, local performers stage mock battles between Spanish Christians and Moors or Aztecs that range from brief sword dances to massive street theatre lasting several days. The festival tradition officially celebrates the triumph of Spanish Catholicism over its enemies, yet this does not explain its persistence for more than five hundred years nor its widespread diffusion. In this insightful book, Max Harris seeks to understand Mexicans' "puzzling and enduring passion" for festivals of moros y cristianos. He begins by tracing the performances' roots in medieval Spain and showing how they came to be superimposed on the mock battles that had been a part of pre-contact Aztec calendar rituals. Then using James Scott's distinction between "public" and "hidden transcripts," he reveals how, in the hands of folk and indigenous performers, these spectacles of conquest became prophecies of the eventual reconquest of Mexico by the defeated Aztec peoples. Even today, as lively descriptions of current festivals make plain, they remain a remarkably sophisticated vehicle for the communal expression of dissent.
Post-Imperial Brecht
Post-Imperial Brecht challenges prevailing views of Brecht's theatre and politics. Kruger focuses much of her analysis in regions where Brecht has had special resonance, including East Germany, and South Africa, where Brechtian philosophy has been vigorously employed in the anti-apartheid movement. Kruger also analyses political interpretations of Brecht in light of other key dramatists, including Heiner MÜller and Athol Fugard. The book also examines Brechtian influence on writers and philosophers such as Adorno, Benjamin, and Barthes.
