Pilot/vehicle model analysis of visually guided flight

Information is given in graphical and outline form on a pilot/vehicle model description, control of altitude with simple terrain clues, simulated flight with visual scene delays, model-based in-cockpit display design, and some thoughts on the role of pilot/vehicle modeling

Equipment for Disposal of Waste Gases of Catalytic Oxidation

Tato práce se zabývá návrhem zařízení pro odstraňování těkavých organických látek (VOC) a oxidu uhelnatého (CO) metodou katalytické oxidace a volbou vhodných technologických podmínek pro tuto technologii. Úvod práce je věnován seznámení se s problematikou katalytické oxidace, používaných katalyzátorů, nosičů katalyzátorů a jejich aktivních složek. Jsou nastíněny výhody a nevýhody využití katalytické oxidace proti termickému zpracování a shrnuty aktuálně platné legislativní podmínky pro emise VOC a CO. V další části práce je uveden základní matematický aparát a rešerše dostupných poznatků pro model katalytického reaktoru. Předložený vypracovaný kinetický model uvažuje kontinuální reaktor s pístovým tokem plynu a adiabatickým ohřevem oxidačními reakcemi s korekcí na teplotní ztráty reaktoru. Další kapitola pojednává o návrhu nového prototypu poloprovozní jednotky katalytické oxidace (tj. reaktoru vč. periferií) primárně určeného pro monolitické katalyzátory a sypané katalyzátory formou pevného lože. Podkladem pro konstrukční návrh a dimenzování zařízení jsou materiálové a energetické bilance v programu ChemCAD pro různé plánované použití jednotky, z kterých byly definovány okrajové podmínky provozních parametrů jednotky. Poloprovozní jednotka byla navrhnuta a postavena, byla otestována její základní funkčnost a následně bylo získáno rozsáhlé množství experimentálních dat nejenom pro kinetický model reaktoru. Výsledky modelu pro katalytické spalování byly v dobré shodě s naměřenými výsledky. V další části práce jsou uvedeny dvě případové studie využití katalytické oxidace pro chemický průmysl, konkrétně byla řešena změna režimu nekatalytického spalování odplynů z chemické výroby závodů firmy Momentive Speciality Chemicals v Sokolově a v závodě téže firmy v Leuna (Německo) na katalytický proces. Tyto případové studie přinesly mnoho cenných experimentálních a technologických poznatků z dlouhodobých poloprovozních testů i ověření návrhové koncepce, díky kterým bylo později možné navrhnout pilotní jednotku odstranění polutantů v prostorech NETME Centra a mimo jiné i ekonomicky zhodnotit provozní použití katalytické oxidace pro čištění odpadních plynů v porovnání s klasickým spalováním odpadních plynů na dvou zcela odlišných konkrétních případech. Tyto informace byly cenné a nutné z hlediska ověření předpokladů teoretické části práce na zcela konkrétních podmínkách dvou různých průmyslových výrob. Dle získaných praktických zkušeností a teoretických poznatků byly vypracovány zásady pro navrhování zařízení pro odstraňování VOC a CO v průmyslu.This thesis deals with the design of the equipment and documentation for the design of equipment for the removal of volatile organic compounds (VOC) and carbon monoxide (CO) by catalytic oxidation and the selection of appropriate technological conditions for this technology. Introduction is devoted to familiarization with the field of the catalytic oxidation, used catalysts, catalyst supports and their active components. Advantages and disadvantages of the use of catalytic oxidation versus thermal incineration are outlined and currently applicable legislative terms for VOC and CO emissions are listed. In the next part of the thesis the fundamental mathematical tools and research findings available for catalytic reactor model designed primarily for monolithic catalysts are summarized. Presented kinetic model considers continuous reactor with plug flow of gas and adiabatic heating by oxidation reactions corrected for the heat loss of the reactor. The next chapter discusses the design of the new prototype of the catalytic oxidation pilot plant (i.e. the reactor incl. peripherals) primarily intended for monolithic catalysts and bulk catalysts in the form of the fixed bed. The basis for the design and sizing are material and energy balances in the ChemCAD for different intended use of the unit, from which boundary conditions of the unit operating parameters arises. Pilot plant has been designed and built, functionality tests was scheduled also with consecutive obtaining of experimental data not only for the reactor kinetic model. Results of the model for the catalytic combustion were in good agreement with measured data. The next part includes two industrial case studies of the catalytic oxidation process usage for the chemical industry. In particular it was dealt with a replacement of the non-catalytic combustion for the catalytic for VOC abatement from chemical production plants off-gas streams of the company Momentive Specialty Chemicals in Sokolov and German city Leuna. These case studies have brought many valuable experimental and technological knowledge from long-term pilot tests and also verification of design concept, thanks to which it was later possible to design a pilot unit for removal of pollutants in premises of NETME Centre and among other to economically evaluate the usage of catalytic oxidation for the off gas cleaning, in comparison with traditional combustion, in two completely different individual cases. This information was valuable and necessary for the verification of theoretical assumptions of the thesis on specific conditions of two different industrial productions. Based on acquired practical experience and theoretical background, guidelines for designing of devices for VOC and CO removal in the industry were developed.

Design and fabrication of shadow shield systems for thermal protection of cryogenic propellants Final report

Design and fabrication of shadow shield system for thermal protection of liquid hydrogen propellant tan

Reinforced oxide throat insert development

Wire reinforced zirconium oxide rocket nozzle insert

Spin and orbital degrees of freedom in transition metal oxides and oxide thin films studied by soft x-ray absorption spectroscopy

The class of transition metal compounds shows an enormous richness of physical properties [1,2], such as metal-insulator transitions, colossal magneto-resistance, super-conductivity, magneto-optics and spin-depend transport. The theoretical description of these materials is still a challenge. Traditional methods using the independent electron approximation most of the time fail on even the simplest predictions. For example, many of the transition metal compounds, with NiO as the classical example, should be a metal according to band-structure calculations, but are in reality excellent insulators. The single band Mott-Hubbard model [3,4] explains very nicely why many correlated materials are insulating. But even the Mott-Hubbard model has some problems in understanding the band-gap found for many of the transition metal compounds [5]. With the recognition that transition metal compounds can be of the charge-transfer type or the Mott-Hubbard type [6], depending on the ratio of U and Delta, also the band-gap can be understood. Hereby U is defined as the repulsive Coulomb energy of two electrons on the same transition metal site and Delta is defined as the energy it costs to bring an electron from an oxygen site to a transition metal site. The single band Mott-Hubbard model is however, even when charge transfer effects are included, inadequate in describing the full richness found in many of the transition metal compounds [7-9]. It now becomes more and more clear that in order to describe transition metal compounds, the charge, orbital, spin and lattice degrees of freedom should all be taken into account. Especially the orbital degrees of freedom have not been considered to the full extend until recently. In the manganates, for example, orbital and charge ordering of the Mn ions play an important role for the colossal magneto-resistance of these materials [10-14]. An other example would be the metal-insulator transition in V2O3 [15-17]. The orbital occupation of the V ion changes drastically at the phase transition [15]. This change in orbital occupation will change the local spin-spin correlations which in-turn will change the effective band-width. This indicates that not only electron-electron Coulomb repulsion in a single band must be considered, but a full multi-band theory including all interactions must be considered in order to understand this prototypical Mott-Hubbard system. With the recognition that the local orbital occupation plays an important role in many of the transition metal compounds there is a need for experimental techniques that can measure the orbital occupation. This technique is soft x-ray absorption spectroscopy (XAS). For transition metal atoms one measures the local transition of a 2p core electron into the 3d valence shell. In chapter 5 to chapter 7 we used soft x-ray absorption spectroscopy to measure orbital occupations, crystal fields, and spin directions in thin films of NiO, CoO and MnO. In chapter 8 to chapter 10 we used soft x-ray absorption spectroscopy to gain insight in the importance of spin and orbital degrees of freedom in bulk crystals of Sr2CoO3Cl, LaTiO3 and VO2. [1] N. Tsuda, K. Nasu, A. Yanase, and K. Siratori, Electronic Conduction in Oxides (Springer Series in Solid-State Sciences 94, Springer Verlag, Berlin, 1991) [2] M. Imada, A. Fujimori, and Y. Tokura, Rev. Mod. Phys. 70, 1039 (1998). [3] N. F. Mott, Proc. Phys. Soc. A 62, 416 (1949). [4] J. Hubbard, Proc. Roy. Soc. London Ser. A 276, 238 (1963) [5] G. A. Sawatzky and J. W. Allen, Phys. Rev. Lett. 53, 2339 (1984). [6] J. Zaanen, G. A. Sawatzky, and J. W. Allen, Phys. Rev. Lett. 55, 418 (1985). [7] R. J. Birgeneau and M. A. Kastner, Science 288, 437 (2000). [8] Y. Tokura and N. Nagaosa, Science 288, 462 (2000). [9] J. Orenstein and A. J. Millis, Science 288, 468 (2000) [10] A. P. Ramirez, J. Phys.: Conden. Matter 9, 8171 (1997). [11] D. I. Khomskii and G. A. Sawatzky, Solid State Commun. 102, 87 (1997). [12] T. Mizokawa and A. Fujimori, Phys. Rev. B 51, 12880 (1995). [13] T. Mizokawa and A. Fujimori, Phys. Rev. B 54, 5368 (1996). [14] T. Mizokawa and A. Fujimori, Phys. Rev. B 56, 493 (1997). [15] J.-H. Park, L. H. Tjeng, A. Tanaka, J. W. Allen, C. T. Chen, P. Metcalf, J. M. Honig, F. M. F. de Groot, and G. A. Sawatzky, Phys. Rev. B 61, 11506 (2000). [16] S. Y. Ezhov, V. I. Anisimov, D. I. Khomskii, and G. A. Sawatzky, Phys. Rev. Lett. 83, 4136 (1999). [17] F. Mila, R. Shiina, F.-C. Zhang, A. Joshi, M. Ma, V. Anisimov, and T. M. Rice, Phys. Rev. Lett. 85, 1714 (2000)

Conceptual design and analysis of shadow shield systems for thermal protection of cryogenic propellants Interim report

Conceptual design and analysis of shadow shield systems for thermal protection of cryogenic propellant

Implementación de herramientas de Bussines Intelligence para una empresa de servicios

Este trabajo consiste en la descripción y explicación del proyecto realizado en la empresa InOrbis Anlaytics, es una consultaría enfocada al Bussines Intelligence y al análisis de datos, el proyecto en cuestión se realizo para el Grupo W. Grupo W dispone de un sistema analítico desactualizado y anticuado basado en Qlik, una herramienta cerrada que no permite la visualización ni la representación de los datos con otras tecnologías de visualización de datos. Para ello, Grupo W quiere migrar de Qlik para mejorar sus capacidades analíticas logrando así una visión más clara sobre el funcionamiento de su negocio y actuar en consecuencia. Para lograrlo contrata a Inorbis Analytics donde el estudiante con la supervisión de su Project manager crearan un nuevo entorno de Bussines Intelligence y migraran a nuevas tecnologías. El objetivo principal del proyecto es obtener mas flexibilidad para poder escoger la tecnología adecuada en cada momento y obtener las mayores capacidades analíticas sea cual sea la tecnología que lo ofrezca en cada periodo de tiempo, para lograr este objetivo se creara un proceso ETL el cual extraerá los datos y los almacenara en una base de datos. Una vez almacenados se tratarán y transformarán para un correcto y optimo análisis. En la memoria se describe cada paso del proyecto, desde el origen de los datos, pasando por la estructura diseñada en la base de datos, hasta el análisis y representación mediante la herramienta de visualizaciónAquest treball consisteix en la descripció i explicació del projecte realitzat en l'empresa InOrbis Anlaytics, és una consultaria enfocada al Bussines Intelligence i a l'anàlisi de dades, el projecte en qüestió es realitzo per al Grup W. Grup W disposa d'un sistema analític desactualizado i antiquat basat en Qlik, una eina tancada que no permet la visualització ni la representació de les dades amb altres tecnologies de visualització de dades. Per a això, Grup W vol migrar de Qlik per a millorar les seves capacitats analítiques aconseguint així una visió més clara sobre el funcionament del seu negoci i actuar en conseqüència. Per a aconseguir-ho contracta a Inorbis Analytics on l'estudiant amb la supervisió de la seva Project manager creessin un nou entorn de Bussines Intelligence i migressin a noves tecnologies. L'objectiu principal del projecte és obtenir mes flexibilitat per a poder triar la tecnologia adequada a cada moment i obtenir les majors capacitats analítiques sigui com sigui la tecnologia que ho ofereixi en cada període de temps, per a aconseguir aquest objectiu es creés un procés ETL el qual extraurà les dades i els emmagatzemés en una base de dades. Una vegada emmagatzemats es tractaran i transformaran per a un correcte i optimo anàlisi. En la memòria es descriu cada pas del projecte, des de l'origen de les dades, passant per l'estructura dissenyada en la base de dades, fins a l'anàlisi i representació mitjançant l'eina de visualitzacióThis work consists of the description and explanation of the project carried out in the company InOrbis Anlaytics, a consulting company focused on Business Intelligence and data analysis, the project in question was carried out for Grupo W. Grupo W has an outdated and obsolete analytical system based on Qlik, a closed tool that does not allow the visualization and representation of data with other data visualization technologies. For this, Grupo W wants to migrate from Qlik to improve its analytical capabilities, thus achieving a clearer view on the performance of its business and act accordingly. To achieve this, they hired Inorbis Analytics where the student with the supervision of their project manager will create a new Business Intelligence environment and migrate to new technologies. The main objective of the project is to obtain more flexibility to choose the right technology at all times and get the best analytical capabilities whatever the technology that offers it in each period of time, to achieve this goal will create an ETL process which will extract the data and stored in a database. Once stored, the data will be processed and transformed for a correct and optimal analysis. The report describes each step of the project, from the origin of the data, through the structure designed in the database, to the analysis and representation by means of the visualization too

Thermal performance of multilayer insulations Final report

Composite multilayer insulation system of double goldized, Nylar radiation shield

Aerospace medicine and biology: A continuing bibliography with indexes (supplement 364)

This bibliography lists 188 reports, articles and other documents introduced into the NASA Scientific and Technical Information System during June 1992. Subject coverage includes: aerospace medicine and physiology, life support systems and man/system technology, protective clothing, exobiology and extraterrestrial life, planetary biology, and flight crew behavior and performance