Formulation of additional observables for ENTREE

The S-band X and Y angles, SAMS, and TACAN range and bearing were incorporated into the ENTREE software for use by experimenters at LaRC for entry trajectory reconstruction purposes. Background discussions present the need for this added capability. Formulations for the various observables are presented. Both north-south and east-west antenna mounts were provided for in the S-band angle computations. Sub-vehicle terrain height variations are included in the SAMS model. Local magnetic variations were incorporated for the TACAN bearing computations. Observable formulations are discussed in detail along with the partial computations

Polythiophene and oligothiophene systems modified by TTF electroactive units for organic electronics

The aim of this review is to give an update on current progress in the synthesis, properties and applications of thiophene-based conjugated systems bearing tetrathiafulvalene (TTF) units. We focus mostly on the synthesis of poly- and oligothiophenes with TTF moieties fused to the thiophene units of the conjugated backbone either directly or via a dithiin ring. The electrochemical behaviour of these materials and structure–property relationships are discussed. The study is directed towards the development of a new type of organic semiconductors based on these hybrid materials for application in organic field effect transistors and solar cells

OEXP Analysis Tools Workshop

This publication summarizes the software needs and available analysis tools presented at the OEXP Analysis Tools Workshop held at the NASA Langley Research Center, Hampton, Virginia on June 21 to 22, 1988. The objective of the workshop was to identify available spacecraft system (and subsystem) analysis and engineering design tools, and mission planning and analysis software that could be used for various NASA Office of Exploration (code Z) studies, specifically lunar and Mars missions

The Reception of Gerhart Hauptmann's Dramas in Russia

Submitted to the Department of Germanic Languages and Literatures and the Faculty of the Graduate School of the University of Kansas in partial fulfillment of the requirements for the degree of Doctor of Philosophy.The reception of Gerhart Hauptmann's dramas in nineteenth-century Russia began in 1889 with the Russian review of Vor Sonnenaufgang as performed in Germany. Hanneles Himmelfahrt was the first play by Hauptmann to be staged in Russia (1895), performed by the troupe of the St. Petersburg Theater of the Literary Arts Circle; the play ran quite successfully, largely due to its social content, which appealed to both the progressive and reactionary factions of the intelligentsia. Hannele, followed by Die versunkene Glocke and Michael Kramer, was the most successful of the six Hauptmann plays performed by the St. Petersburg company. By 1901, Novoe Vremia had proclaimed Hauptmann as Germany's leading dramatist. Despite the early gains for Hauptmann's dramatic works at the St. Petersburg Theater, where there were serious deficiencies in directing and stage technique, the prominance of Hauptmann's plays would have been unthinkable without the main vehicle which conveyed them, the Moscow Art Theater, without the significant artistic support from Anton Chekhov or the repertory inclinations of Nemirovich- Danchenko, and most of all, without the inestimable talents and favor of Russia's greatest actor-director, Konstantin Stanislavsky. Approximately 1905-06 both a literary trend away from Naturalism and, more importantly, political considerations worked to the detriment of continued popularity for Hauptmann's plays. Following the end of World War I, Russian interest in Hauptmann's works increased significantly, as Die Weber drew considerable attention for possible use in promoting political ends; Lenin himself directed that this play be performed on Soviet stages. Russian interest in Hauptmann's works declined noticeably in the late 1920s, largely due to the disfavor of Stalin's Commissar of Education Lunacharsky, who greatly admired Hauptmann, but now viewed the vacillations and symbolism of the author as negative. The early 1930s saw a culmination of attention to, and publication of, Hauptmann's dramas, but, overall, a lengthy loss of interest ensued thereafter due to political hostilities with Germany. Soviet scholarship and dramatic representation mainly concerned Die Weber and Vor Sonnenuntergang after the war. Post-Soviet Russia continues to hold Hauptmann in high regard, as indicated by its foremost institution of higher learning, Moscow State University

Reconstruction of the 1st Space Shuttle (STS-1) entry trajectory

A discussion of the generation of the best estimate trajectory (BET) of the first Space Shuttle Orbiter entry flight is presented. The BET defines a time history of the state, attitude, and atmospheric relative parameters throughout the Shuttle entry from an altitude of approximately 183 km to rollout. The inertial parameters were estimated utilizing a weighted least squares batch filter algorithm. Spacecraft angular rate and acceleration data derived from the Inertial Measurement Unit were utilized to predict the state and attitude which was constrained in a weighted least squares process to fit external tracking data consisting of ground based S-band and C-band data. Refined spacecraft altitude and velocity during and post rollout were obtained by processing artificial altimeter and Doppler data. The BET generation process is discussed. Software and data interface discussions are included. The variables and coordinate systems utilized are defined. STS-1 mission peculiar inputs are summarized. A listing of the contents of the actual BET is provided

Summary of shuttle data processing and aerodynamic performance comparisons for the first 11 flights

NASA Space Shuttle aerodynamic and aerothermodynamic research is but one part of the most comprehensive end-to-end flight test program ever undertaken considering: the extensive pre-flight experimental data base development; the multitude of spacecraft and remote measurements taken during entry flight; the complexity of the Orbiter aerodynamic configuration; the variety of flight conditions available across the entire speed regime; and the efforts devoted to flight data reduction throughout the aerospace community. Shuttle entry flights provide a wealth of research quality data, in essence a veritable flying wind tunnel, for use by researchers to verify and improve the operational capability of the Orbiter and provide data for evaluations of experimental facilities as well as computational methods. This final report merely summarizes the major activities conducted by the AMA, Inc. under NASA Contract NAS1-16087 as part of that interesting research. Investigators desiring more detailed information can refer to the glossary of AMA publications attached herein as Appendix A. Section I provides background discussion of software and methodology development to enable Best Estimate Trajectory (BET) generation. Actual products generated are summarized in Section II as tables which completely describe the post-flight products available from the first three-year Shuttle flight history. Summary results are presented in Section III, with longitudinal performance comparisons included as Appendices for each of the flights

STS-8 bet results

The final Best Estimate Trajectory (BET) products, i.e., the reconstructed trajectory, the Extended BET, AEROBET and MMLE input files, generated for the eighth NASA Space Shuttle flight are documented. The reconstructed trajectory (inertial BET) for this Challenger flight, the first night landing is discussed. State (position, velocity, and attitude) plus three accelerometer scale factors were determined from fitting the Guam S-band data, seven C-band passes, and pseudo Doppler and altimeter during rollout on Runway 22. The anchor epoch utilized for the batch weighted-least-squares determination was Sept. 5, 1983 7h1m50s.0 (25310 GMT seconds). The spacecraft altitude at epoch is approx. 617 kft. IMU2 data were selected for the reconstruction

Operations and maintenance planning for community-scale, off-grid wave energy devices

Conference paper from RENEW 2016: 2nd International Conference on Renewable Energies Offshore, 2016-10-24, 2016-10-26, Lisbon, Portugal. This is the author accepted manuscript. The final version is available from the publisher via the DOI in this record.Marine Renewable Energy (MRE) has progressed towards commercialisation over the recent years but signifi-cant barriers still exist. This includes the currently high cost of energy, leaving MRE uncompetitive with re-spect to other more established renewable energy technologies. A significant proportion of this cost comes from Operation and Maintenance (O&M) activities. O&M activity can be reduced through the use of condi-tion-based maintenance scheduling. In offshore environments, the submerged location of most devices enables the use of underwater Acoustic Emission (AE), a new condition-monitoring technique. It combines acoustics (used for environmental monitoring of MRE influence on noise levels) with AE condition monitoring as used in air. This paper assesses the practicality of such an approach in complex ocean environments through detailed sound propagation modelling using the propagation model Bellhop in the Matlab toolbox AcTUP. Results show that acoustic propagation is very sensitive to variations in the shallow water environments considered. When concerning sensor placement, multiple-path interferences mean that the location of the measuring sen-sor(s) needs to be carefully considered, but might not cover all environmental variations over the several months necessary for accurate long-term monitoring. Associated to the shallow depths, these environmental variations also mean that some frequencies cannot be back-propagated easily, generally limiting access to the monitoring of Received Levels. The results presented here are the first steps toward optimizing AE sensor po-sitions and AE measuring strategies for arrays of devices.The lead author would like to thank the academic supervisors of this IDCORE project for their contributions, advice and support. Similar thanks must go to the engineers involved in developing the Squid devices at Albatern Ltd. The author would also like to thank Wave Energy Scotland, the IDCORE programme and their funding bodies, in particular the ETP (Energy Technology Partnership), for their support. IDCORE is funded by the Energy Technology Partnership and the RCUK Energy Programme; Grant number EP/J500847/1