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International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California / Over the last year, the Telemetry Data Center at White Sands Missile Range has conducted extensive comparative testing between its’ 20 year old Best Source Selector and several “off the shelf” selectors currently available. This paper explores the concerns involved in the process of selecting a new Best Source Selector and examines the inherent problems and differences associated with the old and new selectors.

ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / The theoretical capacity of communication channel in the presence of additive white Gaussian noise (AWGN) as defined by Shannon's channel capacity theorem has been well understood since 1940s. This theorem bounds the bit error rate (BER) of RF data links achievable for a particular noise level. The development in digital technology over the last decade has made it possible not just to design devices that operate close to the Shannon's limit, but also to explore techniques, such as best source and best data selectors, for further improvements in performance of RF data links where frequency, spatial or polar diverse reception is possible. This paper discusses an approach to improving quality of data links using an advanced diversity technique that does not select one source at a time but aligns and combines soft values from each. It shows how the overall bit error rate of RF data link can be improved by combining signals from multiple receivers and/or transmitters. Test results showing practical performance improvements are presented and discussed.

This thesis deal with the audio preamplifier with input selector. It describes all designed parts of this device. It selects and describes all suitable components. Describes the whole process of electronics design in this device. Then describes the design, manufacture, assembling and testing of the PCB. In conclusion it shows the achieved results and electrical parameters of the device.

This project utilizes hydrocyclones in wastewater treatment to select for heavier solids, and has been used before in multiple small-scale systems. This is the first implementation of hydrocyclones in a full-scale plant for the purpose of increased settleability, while also achieving enhanced biological phosphorus removal without the use of an anaerobic selector. Hydrocyclones receive mixed liquor tangentially and separate light solids from more dense solids through their tapered shape, increasing the velocity of liquid as it moves downward and allowing for selection of a certain solids fraction. The hydrocyclones receive flow from the waste stream, selecting for dense solids to recycle through the process while light solids are wasted, creating a balance of granules and flocs with superior settling characteristics in which phosphorus is removed through phosphorus accumulating organisms (PAO). This project was implemented at a wastewater treatment plant rated at 20 MGD utilizing a 4-stage Bardenpho configuration with an IFAS system. This plant routinely experienced moderate settleability issues with an average SVI of 141 and a 90th percentile SVI of 179. Over time data was collected to characterize settleability and activity of PAO, GAO, and filaments. Using an external selector to achieve biological phosphorus is significant in that most wastewater treatment plants cannot do this without the use of an anaerobic selector. This has the potential to apply external selectors to existing infrastructure throughout plants worldwide to achieve not only biological phosphorus removal, but also improved settleability with a very minor capital investment. / Master of Science

International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / The UTTR (Utah Test & Training Range) offers the largest over land test and training airspace in the continental United States. It provides excellent telemetry data processing capability through a number of TM (telemetry) sites. Selecting the best source of telemetry data for optimum coverage from these many sites can be very involved and challenging for ground station personnel. Computer-based best source selection automates this process, thereby increasing accuracy and efficiency. This paper discusses the capabilities of the BTSS (Best Telemetry Source Selector), its background, design and development, applications, and future at the UTTR.

This work deals with the interaction of human and non-human actors in the creative process. Its basic point is the notion of a socio-technological order, which works with equal access to human and non-human actors in social processes. The work is inspired by concepts from the selected studies, science and technology (Science and Technology Studies). Research follows the interaction of human and non-human entities using the example of programming music on the radio, namely the Czech Radio station for young listeners, Radio Wave. Field research was based on monitoring the interaction of three key players in the process of programming: music, selector software (used for programming most music radio stations worldwide) and the music director. The observation of mutual cooperation, induced effects, pressures, manipulation and the transformation of actors provides a comprehensive look at the creative process in which the software is not just a passive tool in the hands of its active user and music is not just obedient material in the hands of the reigning human creator, the music director. The goal is to help challenge anthropocentric discrimination of technologies and their activities in contemporary society. Although the research showed that, at Radio Wave, although the use of software is limited by a greater...

Capillary electrophoresis is a widely used separation method of analytical chemistry. Addition of a selector into the background electrolyte extends its applicability to separation of enantiomers or of compounds of similar physicochemical properties. In analytical practice, mixtures of selectors are also commonly used - either prepared intentionally to achieve better separation or because commercially available selectors may be mixtures of compounds differing in the degree of substitution and substituent positions. Mathematical description of these systems, which are highly relevant in analytical practice, can simplify search for optimal separation conditions. Also, it provides a useful insight into the separation mechanism. In this work, a model of electromigration of an analyte interacting with a mixture of two selectors is proposed and experimentally verified. This model results from a more general description of systems with an arbitrary number of selectors. The model shows that a selector mixture can be treated as a single selector if the ratio of the respective selector concentrations is kept constant. When the mixture is prepared intentionally, this description predicts, how separation potential of the mixture changes with its composition. Thus it allows the optimal composition and total...

Three dimensional visualisation achieves tremendous savings in time and costs during the design process. Due to these circumstances this methods are gaining in importance. For example improvement in performance and the product security or enabling the operative optimization of a production sequence. By the virtual testing it is possible to validate a product in the whole developing process and product lifecycle. The flight simulator ATILa at Airbus Defence and Space in Friedrichshafen uses these advantages for own products. ATILa is used to test intelligent assistance systems for helicopter pilots. Here the graphic implementation of the virtual earth plays a key role when practicing realistical scenarios. This approach is implemented with the Common Database (CDB) which is enabled by the definition of specifications and standards. Different commercial software packages by Presagis are used to implement the aforementioned database. The software Terra Vista is used for the database generation, including the compilation. For the CDB implementation the software Vega Prime is used to prepare the data with the help of the RTP. The software Vega Prime is not able to display 3D models with LODs, due to a software error. Therefore a third software named Creator is used to modify them. The 3D models are available in the OpenFlight Format. This OpenFlight format consists of different kind of nodes with a complex hierarchical structure. Other software solutions, such as Autodesk or Blender, are not able to provide access to the specific structure. The edited models can be integrated in the virtual environment and have to defined by unambiguous indices. Various settings are used to implement the objects automatically. The compilation of the area of interest takes place by the definition of a geotile with a specific size depending on the latitude. The CDB ouput will be transferred by Vega Prime and with the help of the RTP into the simulator. In addition, there is the possibility to render various CDB databases in the simulator to enable a visualisation of the complete earth. Finally, any errors occurring will be described and methods of resolution explained. The complexity of the generation process of a CDB database could be represented with this thesis. However, the whole workflow of the visualisation of the earth is still in its initial stages, since among other things there are errors in the software. To sum up; the potential of the CDB can be evaluated as above average. / Die 3D Visualisierung vereinfacht den Planungsprozess und geht somit mit einer Zeit- und Kosten- einsparung einher. Aufgrund dieser Sachverhalte gewinnt sie immer weiter an Bedeutung, um zum Beispiel eine verbesserte und sichere Benutzung eines Produktes oder einen optimierten Betrieb einer Produktionskette zu ermöglichen. Durch vorherige virtuelle Erprobung und Vali- dierung eines Produktes können Kosten für den gesamten Entwicklungsprozess und den Pro- duktlebenszyklus gering gehalten werden. Im Flugsimulator für Helikopter namens ATILa in Friedrichshafen (Airbus Defence and Space) versucht man die genannten Vorteile für die eigenen Produkte zu nutzen. Im ATILa werden Assistenzsysteme geprüft, welche die Helikopterpiloten während ihres Fluges unterstützen sollen. Hierbei spielt die grafische Umsetzung der virtuellen Erde in dem Simulator eine entscheidende Rolle, um die Szenarien realitätsnah durchführen zu können. Dies kann mit Hilfe einer sogenannten Common Database (CDB), die durch Spezi- fikationen und Standards definiert ist, umgesetzt werden. Mittels verschiedener kommerzieller Softwarepakete der Firma Presagis lässt sich die oben genannte Datenbank erstellen. Die Gener- ierung und Kompilierung wird mit dem Softwareprogramm Terra Vista vorgenommen. Die Imple- mentierung der CDB in den Flugsimulator erfolgt mit der Software Vega Prime, welche die Daten über einen RTP zur Verfügung stellt. Da dieses Programm durch einen Softwarefehler nicht in der Lage ist, 3D Modelle mit verschiedenen Detaillierungsgraden darzustellen, muss eine dritte Soft- ware namens Creator genutzt werden. Die 3D Modelle liegen im OpenFlight Format vor. Dieses OpenFlight Format weist eine komplexe hierarchische Struktur aus verschiedenen Knoten auf. Andere Softwarelösungen, wie Autodesk oder Blender, sind nicht in der Lage einen Einblick in die spezielle Struktur zu geben. Die bearbeiteten Modelle können dann in der virtuellen Umgebung eingebunden und müssen durch eindeutige Indizes definiert werden. Verschiedene Einstellun- gen werden genutzt, um Objekte automatisch einzubinden. Die Kompilierung des Interessenge- bietes erfolgt über die Definition einer Geokachel mit einer bestimmten Größe, die abhängig vom Breitengrad ist. Die ausgegebene CDB wird mit Vega Prime und mit Hilfe des RTPs in den Simu- lator übertragen. Des Weiteren gibt es die Möglichkeit verschiedene CDB Datenbanken im Sim- ulator simultan zu rendern, was eine vollständige Visualisierung der kompletten Erde ermöglicht. Abschließend werden aufgetretene Fehler näher beschrieben und Lösungsansätze erläutert. Mit der vorliegenden Arbeit konnte die Komplexität der Entstehung einer CDB Datenbank dargestellt werden. Dennoch befindet sich der gesamte Arbeitsablauf der Visualisierung der Erde noch am Anfang, da u.a. Softwarefehler zu bemängeln sind. Zusammenfassend kann das Potenzial einer CDB als überdurchschnittlich bewertet werden.

The generation of compressed air comprises 20% of the total electricity usage in the mining industry, although compressed air is often seen as a free source of energy. There are however significant costs associated with generating compressed air and maintaining a compressed air system. There are several methods to optimise the electricity used to generate compressed air. The focus of this study is on one of these methods – the implementation of a dynamic air compressor selector. A Dynamic Compressor Selector (DCS) system was developed to fulfil this purpose. DCS is a system that combines demand- and supply-side management of a compressed air network. DCS calculates a pressure set point for compressors and schedules the compressors according to the demand from the end-users. End-users include shafts, plants, workshops and smelters. DCS takes all of the compressors and end-users into consideration while doing the calculations. This dissertation focuses on the DCS implementation process and on the problems encountered by previous authors while implementing the DCS technology. Additional problems were encountered while the DCS technology was implemented. DCS was however still successfully implemented. This study will expand the implementation procedure to ensure that the technology can be implemented successfully in the future. DCS was implemented at a platinum mine in South Africa where it was able to calculate pressure set points for the compressors. DCS was able to accurately match the supply of, and demand for compressed air closely, resulting in lower overall compressed air usage. DCS improved compressor scheduling and control, limiting compressor cycling. Improved compressor scheduling and control resulted in significant decreases in the electricity used to generate compressed air at the mine. A target average evening peak clip of 2.197 MW was simulated, set and achieved. Evening peak clip power savings in excess of an average of 3 MW were achieved. / MIng (Mechanical Engineering), North-West University, Potchefstroom Campus, 2015