Dissertationen zum Thema „Read range“
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Chen, Jian. „ULTRA LOW POWER READ-OUT INTEGRATED CIRCUIT DESIGN“. Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1345480982.
Der volle Inhalt der QuelleMarler, Thomas M., Kelly Cooper und William F. Lake. „A MODULAR RANGE INTERFACE FOR ACQUISITION AND DISTRIBUTION OF TEST RANGE DATA“. International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607595.
Der volle Inhalt der QuelleA flexible, modular method is needed to connect test range data systems to central real-time computer networks. This is achieved by the development of a real-time, networked, VME-based range interface system. Flexibility is achieved by a modular hardware and software design. The modular hardware consists of standard network interfaces, COTS VME interfaces, and a VME single board computer (with an onboard PCI bus). The modular software is implemented in C++ using the VxWorks real-time operating system. This paper describes the conceptual design and development of the Modular Range Interface (ModRI).
Kam, ChiWeng. „902-928MHz UHF RFID Tag Antenna Design, Fabrication and Test“. DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/598.
Der volle Inhalt der QuelleMughal, Aiman. „Statistical analysis of the coupling effects between tags in the RFID links“. Electronic Thesis or Diss., Université Gustave Eiffel, 2024. http://www.theses.fr/2024UEFL2002.
Der volle Inhalt der QuelleDifferent empirical studies show that the effect of mutual coupling and the random position and orientation of tag antennas in a reduced volume result in a degradation of key performance indicators of an RFID system such as the read-range and the read-rate. This thesis takes part in the performance analysis of such an RFID system by exploring the physical phenomena behind the degradation and by introducing statistical techniques into investigations. Prior to the group behaviour investigations, the sensitivity and the impedance of two RFID chips (Higgs-3 and Higgs-9) have been measured. Two RFID tags have been used, a commercial one (ALN-9662) associated with the Higgs-3 chip and a home-made tag, which has been fabricated in laboratory to match the Higgs-9 chip. The read range of both tags has measured along with their antenna impedance. The measurement results have been confronted to electromagnetic simulations. In order to study various cases involving randomly positioned tags, an electromagnetic model and simulation tools (HFSS and NEC) have been used and the conclusions are based on their results while cross-validated in a few cases by measurements. To simplify any further, the RFID tags are modelled by a set of half-wave dipoles, with and without T-match, and the reader is replaced by a plane wave. The objective is to confront the behaviour of a single isolated tag to that of the same tag while surrounded by other tags and to conclude on the impact of the antenna type, the density of tags, the terminating load and the wave polarisation on the output under observation. The RFID link is studied through its forward and reverse links and by using a conventional grid model for tags including coupling. A thorough power budget analysis is conducted and the absorbed power at the level of the loads (chips) and the reradiated power at the level of the antennas are assessed. Regarding the forward link, the ratio of the absorbed power by the chip of a surrounded tag to that of an isolated tag is called normalised absorbed power and constitutes a useful tool to estimate the percentage of inactivated tags in the set. Regarding the reverse link, the Radar Cross Section (RCS) of loaded antennas with short-circuit and matched loads have been studied. The differential RCS of the isolated tag and that of the surrounded one has also been evaluated and the impact of coupling on the backscattered power have been studied. As in a high-density random context, predicting the system performances in a realistic way with a deterministic approach is impossible, several configurations of randomly positioned and oriented tags and dipoles have been simulated and the conclusions are drawn using statistical analysis. In other words, at the end of this study, the performance degradation of a particular tag in a given configuration of surrounding tags needs to be evaluated individually but the statistical moments as well as cumulative distribution functions allow to predict the behaviour of a population tags under given conditions. This thesis helps the RFID designer to assess the performance of an RFID scenario and eventually adjust some input parameters such as the density of tags in order to attain the desired objectives
Chen, Sicheng. „A single-chip real-Time range finder“. Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/553.
Der volle Inhalt der QuelleSikora, Marek. „Detekce slow-rate DDoS útoků“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-317019.
Der volle Inhalt der QuelleGreer, Donald Reed. „Multiresolution laser radar range profiling of real imagery“. Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40181.
Der volle Inhalt der QuelleIncludes bibliographical references (leaves 112-113).
by Donald Reed Greer.
M.Eng.
Milunov, Dimitrije. „External real time control of E.coli range expansion“. Electronic Thesis or Diss., Université Paris Cité, 2023. http://www.theses.fr/2023UNIP7078.
Der volle Inhalt der QuelleAdvances in microfluidics, sensory technology and synthetic and molecular biology enabled the rise of a novel scientific field in which fundamentals of control theory can be applied to externally control and regulate cellular bioprocesses-cybergenetics. So far, cybergenetics was able to successfully control complex multi-stable and adaptive gene networks at the population and the single cell level, but challenges in the control of biological multiagent-like system composed of multiple interactive components have not yet been addressed. In this study we focused on dense biofilm like colonies of E.coli which were grown inside the multilayered microfluidic device whose geometry enabled the growth of the colonies in one direction. Similarly to biofilms, it is widely known that dense E.coli colonies exhibit remarkable levels of spatial organization that come as a consequence of the complex interplay between nutrient and chemical gradients and metabolic interactions between different layers of the colony. These interactions make both dense colonies and biofilms more resistant to antimicrobial agents treatment consequently making them difficult to eradicate. Thus can we and at which extent we could externally control this system remains an open question. To answer this we firstly quantitively analyzed the growth patterns inside the colony to understand the dynamics of the system. We used three different strategies to perturb the colony and to see the impact on the spatial growth patterns - modulation of RNA polymerase by inducible promoter and biochemical modulation of the cellular resources by nutrient change and antibiotics. Since the cells were nonmotile, the invasion speed of the colony could be regarded as a global descriptor of the colony spatial growth dynamics. Thus having this in mind we finally used the understanding of the systems dynamics, knowledge of colonies response to various stimulus and a custom made control platform to externally control the invasion speed of the colony
Koch, Carsten. „Real-time occupant detection in high dynamic range environments“. Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397877.
Der volle Inhalt der QuelleMARTINS, RODRIGO PEREIRA. „REAL TIME RENDERING USING HIGH DYNAMIC RANGE ILLUMINATION MAPS“. PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9185@1.
Der volle Inhalt der QuelleA principal meta da computação gráfica é a síntese de imagens. Essas imagens podem ser tanto geradas por computador quanto ser resultado de manipulação digital de fotografias. Diferentes métodos para captura de imagens e fotografia digital mudaram a importância da imagem digital. Em relação a imagens geradas por computador, a busca por imagens mais realistas é importante para a indústria de filmes, de desenvolvimento de jogos entre outras. Uma das maiores revoluções na computação gráfica atual está relacionada a imagens High Dynamic Range. Essas imagens representam o próximo nível em termos de representação de imagens, uma vez que seus valores são verdadeiramente proporcionais às condições de iluminação em uma cena e são capazes de codificar a dynamic range encontrado no mundo real, fato impossível para as imagens tradicionais que apresentam 24 bits por pixel. Quando imagens high dynamic range são utilizadas para codificar as condições de iluminação em uma cena, elas são chamadas mapas de radiância ou mapas de iluminação. O foco principal dessa dissertação é mostrar técnicas de renderização em tempo real utilizando mapas de iluminação. Técnicas conhecidas como Image Based Lighting. Esse trabalho apresenta os conceitos de imagens high dynamic range, seus fundamentos físicos na teoria da luz, uma série de trabalhos importantes em manipulação dessas imagens e uma discussão sobre o pipeline de aplicações em tempo real que utilizam high dynamic range. Finalmente são apresentadas as técnicas para utilização de mapas de iluminação em alta precisão em tempo real.
In 1997, the seminal work by Paul Debevec and Jitendra Malik on the generation of HDR (High Dynamic Range) images, from ordinary LDR (Low Dynamic Range) cameras, facilitated the generation of light probes enormously. In consequence, this caused a boom of works on the rendering of objects with images of light from the real world, which is known as Image- Based Lighting. The present dissertation aims to study this new area, trying to situate itself in the question of real-time compositing of synthetic objects in real images. This dissertation proposes a real-time rendering pipeline for 3D games, in the simple case of static scenes, adapting the non-real-time technique presented by Paul Debevec in 1998. There is no written work about this adaptation in the literature, although exists some reference to developments done by graphics card manufacturers in this direction. Also this dissertation presents an experiment with diffuse objects. Moreover, the author gives ideas towards the solution of shadow problems for diffuse objects.
Douglas, Steven R. „Network Configuration for Range Interconnectivity“. International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/611745.
Der volle Inhalt der QuelleA demonstration of near real-time performance assessment for the Program Executive Officer for Cruise Missiles Project and Unmanned Aerial Vehicles, Cruise Test Directorate, PEO(CU)-CT, was conducted between 22 March 1994 through 4 May 1994. The demonstration involved the temporary installation of a portable TOMAHAWK telemetry recording and telecommunications capability at the Air Force Development Test Center range at Eglin Air Force Base, Florida and a receiving telecommunications capability at the Naval Warfare Assessment Division (NWAD), Corona, California. The system was successfully used on 4 May 1994 to record TOMAHAWK missile telemetry data in real-time in support of Operational Test Launch (OTL)-163 and to transfer that data to the weapons system performance analysts at NWAD in near real-time. The one hour and three minutes of flight data was compressed in real-time as it was recorded, then, after completion of the flight, the data was transferred to NWAD in about 12 minutes using the switched 56 kbps network. Additional transfers using the Defense Commercial Telecommunications Network (DCTN) were also conducted. All transfers were secured using ethernet encryptors. The data was processed by both the NWAD telemetry ground station and the TOMAHAWK workstation complex. This paper quantifies the results and documents the lessons learned from this demonstration and proposes a standardized system design for possible implementation at TOMAHAWK test range sites in the future. A position is taken that for situations where the remote site (e.g. other range or data analysis site) does not exercise direct operational control over the test/host range, near real-time data relay solutions are not only as adequate, but in many cases are preferable to real-time solutions.
Åstrand, Lisa. „Implementation of Sub-GHz Real Time Radio“. Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-296511.
Der volle Inhalt der QuelleMason, Andy, und Steve Gills. „Real-Time High Resolution Digital Video for Range and Training Applications“. International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607687.
Der volle Inhalt der QuelleThe operator interface to a modern radar, sonar or weapons system trainer (WST) is typically one or more high-resolution video displays driven by PC’s or other workstations. The training system used to instruct and qualify operators for this type of mission critical application should be capable of recording RGB video data to a fine level of detail. Similarly, ground stations for Research, Development, Test and Evaluation (RDT&E) and Operational Test & Evaluation (OT&E) applications often utilize high-resolution workstation screens to display critical test data. And often, these workstation screens are located in mobile vans, on aircraft, or are otherwise remote from test conductors who need access to the same screen data. This paper presents a solution for the efficient digitization, storage, replay, and transmission of the data displayed on the high-resolution workstation screens commonly found in these types of training system applications.
Vera, Jose de. „Structure of the Red Dog district, western Brooks Range, Alaska“. Thesis, Royal Holloway, University of London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427751.
Der volle Inhalt der QuelleMarler, Thomas M. „THE MODULAR RANGE INTERFACE (MODRI) DATA ACQUISITION CAPABILITIES AND STRATEGIES“. International Foundation for Telemetering, 2004. http://hdl.handle.net/10150/605308.
Der volle Inhalt der QuelleThe Modular Range Interface (ModRI) is a reliable networked data acquisition system used to acquire and disseminate dissimilar data. ModRI’s purpose is to connect TSPI systems to a central computer network. The modular hardware design consists of an SBC, COTS network interfaces, and other COTS interfaces in a VME form factor. The modular software design uses C++ and OO patterns running under an RTOS. Current capabilities of ModRI include acquisition of Ethernet, PCM data, RS-422/232 serial data, and IRIG-B time. Future strategies might include stand-alone data acquisition, acquisition of digital video, and migration to other architectures and operating systems.
Lukin, K. A., Yu P. Machekhin und D. N. Tatyanko. „Grid of optical frequencies in a near infra-red range spectrum“. Thesis, Paris, France, 2011. http://openarchive.nure.ua/handle/document/8671.
Der volle Inhalt der QuelleLazúen, Ramírez Álvaro, und Jiménez Adriano Linero. „SIMULATION OF AN EXTENDED RANGE ELECTRIC VEHICLE USAGE IN A REAL ENVIRONMENT“. Thesis, Högskolan i Skövde, Institutionen för teknik och samhälle, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-6317.
Der volle Inhalt der QuelleLefloch, Damien [Verfasser]. „Real-time processing of range data focusing on environment reconstruction / Damien Lefloch“. Siegen : Universitätsbibliothek der Universität Siegen, 2019. http://d-nb.info/1177366398/34.
Der volle Inhalt der QuelleXu, Ruifeng. „REAL-TIME REALISTIC RENDERING AND HIGH DYNAMIC RANGE IMAGE DISPLAY AND COMPRESSION“. Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4288.
Der volle Inhalt der QuellePh.D.
School of Computer Science
Engineering and Computer Science
Computer Science
Koksal, Asuman E. (Asuman Emine) 1974. „Using multiresolution range-profiled real imagery in a stastical object recognition system“. Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/46176.
Der volle Inhalt der QuelleIncludes bibliographical references (leaves 144-146).
by Asuman E. Koksal.
M.S.
KIBLER, R., B. RODGERS, R. BEERS und D. JOSEPH. „REAL/IX2: THE HEART OF A VERY FAST REALTIME TEST RANGE SYSTEM“. International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613468.
Der volle Inhalt der QuelleThis paper describes the history, planning, analysis, design and performance specifications/results of a very fast, real time data acquisition and processing system. The heart of the system is MODCOMP’s fully pre-emptive, realtime UNIX operating system REAL/IX2. The entire system consists of 19 intelligent communication/interface processors on a VME bus all managed by the REAL/X2 master processor. The application for this system was developed by Arcata Assoc. of Las Vegas, NV. for use at Nellis Air Force Base. It resides in the Nellis Range Support network as the master switching node subsystem. The Nellis Network is a data communications system which supports interactive, fullduplex communication of digital data between terminal nodes on electronic combat ranges and range user nodes at Nellis AFB. Many obstacles to meeting the specified performance had to be overcome. When the system was delivered and installed by MODCOMP it met or exceeded the original data handling requirements and throughput. Other system features involve communication processor products from SIMPACT Inc. a San Diego company. The paper will present their involvement in delivering this solution system to ARCATA and ultimately Nellis AFB as well as all performance data achieved from this multi-company venture.
Townsend, Neil William. „Neural networks for mobile robot localisation using infra-red range sensing“. Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260753.
Der volle Inhalt der QuelleWagner, Steven M., und John H. Goodson. „GULF RANGE DRONE CONTROL UPGRADE SYSTEM MOBILE CONTROL SYSTEM“. International Foundation for Telemetering, 1991. http://hdl.handle.net/10150/613180.
Der volle Inhalt der QuelleThe Gulf Range Drone Control Upgrade System (GRDCUS) Mobile Control System (GMCS) is an integral part of the test ranges located on the Gulf of Mexico. This paper begins with a brief overview of the current Gulf Range systems. These systems consist of five major components: ground stations, ground computer systems, data link/transponders, consoles, and software. The GMCS van contains many of these components to provide a stand-alone range capability for remote operations. This paper describes the development and assembly of the GMCS van and focuses on the on-board computer systems, consoles, and data link technology. An overall system engineering approach was used during GMCS development and is highlighted through the use of rapid prototyping. This methodology and the lessons learned are presented in the paper. Suggestions for future applications are considered.
Guthier, Benjamin [Verfasser], und Wolfgang [Akademischer Betreuer] Effelsberg. „Real-Time Algorithms for High Dynamic Range Video / Benjamin Guthier. Betreuer: Effelsberg,Wolfgang“. Mannheim : Universitätsbibliothek Mannheim, 2012. http://d-nb.info/1034315331/34.
Der volle Inhalt der QuelleFarooq, Sajid. „Real-time rendering of large surface-scanned range data natively on a GPU“. Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4573/.
Der volle Inhalt der QuelleHassan, Firas. „REAL-TIME EMBEDDED ALGORITHMS FOR LOCAL TONE MAPPING OF HIGH DYNAMIC RANGE IMAGES“. University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1195664951.
Der volle Inhalt der QuelleKarr, Bill, Matt Maxel und Errol Watson. „Common Display System (CDS) at the NAVAIRWD Ranges“. International Foundation for Telemetering, 2009. http://hdl.handle.net/10150/606004.
Der volle Inhalt der QuelleThe Common Display System (CDS) will provide all NAVAIRWD sites with a flexible Range real-time situational awareness and telemetry display/processing capability. CDS will have an extensible framework enabling all sites to quickly and conveniently develop Range unique plugins to accommodate new requirements or functionality not presently found in the applications common core plug-ins. Range unique plug-ins are separate and distinct from the application's common core engine.
Kovach, Bob. „Next Generation Feature Roadmap for IP-Based Range Architectures“. International Foundation for Telemetering, 2015. http://hdl.handle.net/10150/596390.
Der volle Inhalt der QuelleThe initial efforts that resulted in the migration of range application traffic to an IP infrastructure largely focused on the challenge of obtaining reliable transport for range application streams including telemetry and digital video via IP packet-based network technology. With the emergence of architectural elements that support robust Quality of Service, multicast routing, and redundant operation, these problems have largely been resolved, and a large number of ranges are now successfully utilizing IP-based network topology to implement their backbone transport infrastructure. The attention now turns to the need to provide supplemental features that provide enhanced functionality in addition to raw stream transport. These features include: *Stream monitoring and native test capability, usually called Service Assurance *Extended support for Ancillary Data / Metadata *Archive and Media Asset Management integration into the workflow *Temporal alignment of application streams This paper will describe a number of methods to implement these features utilizing an approach that leverages the features offered by IP-based technology, emphasizes the use of standards-based COTS implementations, and supports interworking between features.
Madron, Justin. „REFORESTATION OF RED SPRUCE (PICEA RUBENS) ON THE CHEAT MOUNTAIN RANGE, WEST VIRGINIA“. VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3113.
Der volle Inhalt der QuelleSmeets, Julien. „Prompt gamma imaging with a slit camera for real time range control in particle therapy“. Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209624.
Der volle Inhalt der QuelleThis thesis reports on the feasibility, development and test of a new type of prompt gamma camera for proton therapy. This concept uses a knife-edge slit collimator to obtain a 1-dimensional projection of the beam path on a gamma camera. It was optimized, using the Monte Carlo code MCNPX version 2.5.0, to select high energy photons correlated with the beam range and detect them with both high counting statistics and sufficient spatial resolution for use in clinical routine. To validate the Monte Carlo model, spectrometry measurements of secondary particles emitted by a PMMA target during proton irradiation at 160 MeV were realised. An excellent agreement with the simulations was observed when using subtraction methods to isolate the gammas in direct incidence. A first prototype slit camera using the HiCam gamma detector was consequently prepared and tested successfully at 100 and 160 MeV beam energies. If we neglect electronic dead times and rejection of detected events, the current solution with its collimator at 15 cm from beam axis can achieve a 1-2 mm standard deviation on range estimation in a homogeneous PMMA target for numbers of protons that correspond to doses in water at Bragg peak as low as 15 cGy at 100 MeV and 25 cGy at 160 MeV assuming pencil beams with a Gaussian profile of 5 mm sigma at target entrance.
This thesis also investigates the applicability of the slit camera for carbon ion therapy. On the basis of Monte Carlo simulations with the code MCNPX version 2.7.E, this type of camera appears not to be able to identify the beam range with the required sensitivity. The feasibility of prompt gamma imaging itself seems questionable at high beam energies given the weak correlation of secondaries leaving the patient.
This work consequently concludes to the relevance of the slit camera approach for real time range monitoring in proton therapy, but not in carbon ion therapy.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Masaad, Elshami M. „Close-range photogrammetry based on digital imagery analysis : real-time photogrammetric measurements from video imagery“. Thesis, University of Manchester, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338480.
Der volle Inhalt der QuellePetit, Leon. „Screened real-space Korringa-Kohn-Rostoker description of the magnetic properties of solids“. Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310727.
Der volle Inhalt der QuelleDavis, Rodney A., Susan K. Semancik, Donna C. Smith und Robert K. Jr Stancil. „OVERVIEW OF THE NASA WALLOPS FLIGHT FACILITY MOBILE RANGE CONTROL SYSTEM“. International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607311.
Der volle Inhalt der QuelleThe NASA GSFC’s Wallops Flight Facility’s (WFF) Mobile Range Control System (MRCS) is based on the functionality of the WFF Range Control Center at Wallops Island, Virginia. The MRCS provides real time instantaneous impact predictions, real time flight performance data, and other critical information needed by mission and range safety personnel in support of range operations at remote launch sites. The MRCS integrates a PC telemetry processing system (TELPro), a PC radar processing system (PCDQS), multiple Silicon Graphics display workstations (IRIS), and communication links within a mobile van for worldwide support of orbital, suborbital, and aircraft missions. This paper describes the MRCS configuration; the TELPro’s capability to provide single/dual telemetry tracking and vehicle state data processing; the PCDQS’ capability to provide real time positional data and instantaneous impact prediction for up to 8 data sources; and the IRIS’ user interface for setup/display options. With portability, PC-based data processing, high resolution graphics, and flexible multiple source support, the MRCS system is proving to be responsive to the ever-changing needs of a variety of increasingly complex missions.
Vetter, Jeff S., und Travis Cribbet. „THE DESIGN AND DEVELOPMENT OF THE PROTOTYPE ENHANCED FLIGHT TERMINATION SYSTEM“. International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/605564.
Der volle Inhalt der QuelleRange Safety Systems are used for destruction of a vehicle should a malfunction cause the vehicle to veer off course. All vehicles launched into space require implementation of a Range Safety System. For years the IRIG receivers have been used with relatively good success. Unfortunately, the IRIG receivers do not provide a high level of security. High alphabet receivers were later developed for use on the big launchers (Atlas, Delta, Titan, etc) and the manned missions (Shuttle) to provide added security. With the IRIG based system, several problems have occurred resulting in the loss millions of dollars worth of equipment. Due to the problems that have occurred it has become apparent that there is a need for a more secure, low cost, type of range safety receiver. This paper describes the design and development of the prototype EFTS system. Mission critical parameters are discussed including selection of the encryption and forward error correction algorithms. Actual measured performance including message error rate characteristic is presented.
Hueso, González Fernando. „Nuclear methods for real-time range verification in proton therapy based on prompt gamma-ray imaging“. Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-204988.
Der volle Inhalt der QuelleBeschleunigte Protonen sind ausgezeichnete Kandidaten für die Behandlung von diversen Tumorarten. Diese geladenen Teilchen stoppen in einer bestimmten Tiefe, bei der die Ionisierungsdichte maximal ist. Da die deponierte Dosis hinter der distalen Kante sehr klein ist, minimiert die Protonentherapie den Schaden an normalem Gewebe verglichen mit der Photonentherapie. Inhärente Reichweitenunsicherheiten stellen jedoch die Bestrahlung von Tumoren in der Nähe von Risikoorganen in Frage und führen zur Anwendung von konservativen Sicherheitssäumen. Dadurch werden die potentiellen Vorteile der Protonen- gegenüber der Photonentherapie sowie ihre letzten Ziele eingeschränkt. Prompte Gammastrahlung, ein Nebenprodukt der Bestrahlung, welche mit der Dosisdeposition korreliert, ist eine zuverlässige Signatur um Reichweitenunterschiede zu detektieren und könnte sogar für eine dreidimensionale in vivo Dosimetrie genutzt werden. In dieser Arbeit werden zwei Methoden für Prompt Gamma-ray Imaging (PGI) erforscht: die Compton-Kamera (CK) und das Prompt Gamma-ray Timing (PGT)-Konzept. Des Weiteren soll deren Anwendbarkeit im klinischen Szenario diskutiert und verglichen werden. Die erste Methode strebt nach der Rekonstruktion der Emissionsdichtenverteilung der prompten Gammastrahlung und basiert auf einem iterativen Bildgebungsalgorithmus sowie auf mehreren positionsempfindlichen Detektoren. Diese werden in eine Streuer- und Absorberebene eingeteilt. Die zweite Methode ist vor Kurzem als eine Alternative zu kollimierten PGI Systemen vorgeschlagen worden, und beruht auf dem Prinzip der Zeitspektroskopie mit einem einzelnen monolithischen Detektor. Die Detektionszeiten der prompten Gammastrahlen beinhalten entscheidende Informationen über das Tiefendosisprofil aufgrund der messbaren Durchgangszeit von Ionen durch Materie. Am Helmholtz-Zentrum Dresden-Rossendorf (HZDR) und OncoRay werden Detektorkomponenten in realistischen Strahlungsumgebungen als ein Schritt zur klinischen CK charakterisiert. Konventionelle Blockdetektoren, welche in kommerziellen Positronen-Emissions-Tomographie (PET)-Scannern zum Einsatz kommen und auf Cer dotiertem Lutetiumoxyorthosilikat - Lu2SiO5:Ce (LSO) oder Bismutgermanat - Bi4Ge3O12 (BGO) Szintillatoren basieren, sind geeignete Kandidaten für den Absorber einer CK wegen der hohen Dichte und Absorptionseffizienz im Energiebereich von prompten Gammastrahlen (mehrere MeV). LSO- und BGO-Blockdetektoren werden in klinisch relevanten Strahlungsfeldern in Bezug auf Energie-, Orts- und Zeitauflösung verglichen. Weiterhin werden zwei BGO-Blockdetektoren (von PET-Scannern), angeordnet als BGO Block Compton-Kamera (BBCK), benutzt, um die Bildgebung von hochenergetischen prompten Gammastrahlen zu untersuchen, die in homogenen Plexiglas-Targets durch einen Protonen-Bleistiftstrahl emittiert werden. Die Motivation hierfür ist, die Detektionseffizienz der Streuerebene zu maximieren, wobei jedoch die Energieauflösung vernachlässigt wird. Targetverschiebungen, sowie Änderungen der Targetdicke und der Teilchenenergie werden untersucht. In einer Kollaboration zwischen OncoRay, HZDR and IBA, wird der erste Test des PGT-Konzepts an einem klinischen Protonenbeschleuniger (Westdeutsches Protonentherapiezentrum Essen) mit mehreren Detektoren und heterogenen Phantomen durchgeführt. Die Sensitivität der Methode hinsichtlich Reichweitenveränderungen wird erforscht. Des Weiteren wird der Einfluss von Untergrund und Stabilität des Zeitprofils des Strahlenbündels untersucht, sowie die Zeitverschmierung des Bündels für verschiedene Protonenenergien charakterisiert. Für die Materialauswahl für den Absorber der CK ergibt sich, dass sich BGO dem lichtstärkeren LSO Szintillator angleicht. Der Grund dafür sind die höheren Energien der prompten Gammastrahlung im Vergleich zum PET Szenario, welche die Energie-, Orts- und Zeitauflösung von BGO stark verbessern. Anhand von offensichtlichen Änderungen der Rückprojektionsbilder zeigt sich, dass mit der BBCK Verschiebungen einer punktförmigen radioaktiven Quelle erfolgreich detektiert, Linienquellen rekonstruiert und Verschiebungen der Protonenreichweite um einen Zentimeter identifiziert werden. Für die PGT-Experimente können mit einem einzigen Detektor Reichweitenunterschiede von fünf Millimetern für definierte heterogene Targets bei klinisch relevanten Dosen detektiert werden. Dies wird durch den numerischen Vergleich der Spektrumform ermöglicht. Bei größerer Ereigniszahl können Reichweitenunterschiede von bis zu zwei Millimetern detektiert werden. Die experimentellen Daten werden durch analytische Modellierung wiedergegeben. Die CK und das PGT-Konzept sind ambitionierte Ansätze zur Verifizierung der Reichweite in der Protonentherapie basierend auf PGI. Intensive Detektorcharakterisierung und Tests an klinischen Einrichtungen sind Pflicht für die Entwicklung geeigneter Prototypen, da der Energiebereich prompter Gammastrahlung sich über mehrere MeV erstreckt, was nicht dem Normbereich der traditionellen medizinischen Anwendungen entspricht. Im Bezug auf die Materialauswahl der CK wird ersichtlich, dass BGO trotz der allgemeinen Überlegenheit von LSO für die Anwendung im Bereich PGI aufholt. Wegen des niedrigeren Preises, der höheren Photoabsorptionseffizienz und der nicht vorhandenen Eigenaktivität erscheint BGO als eine konkurrenzfähige Alternative für die Absorberebene der CK im Vergleich zu LSO. Die Ergebnisse der BBCK, welche mit relativ einfachen Mitteln gewonnen werden, heben die potentielle Anwendung von Compton-Kameras für die Bildgebung prompter hochenergetischer Gammastrahlen hervor. Trotzdem stellen technische Beschränkungen wie die mangelnde Anzahl von Messereignissen pro Bestrahlungspunkt (falls klinische Ströme genutzt werden) die Anwendbarkeit der CK als Echtzeit- und in vivo Reichweitenverifikationsmethode in der Protonentherapie in Frage. Die PGT-Methode ist ein alternativer Ansatz, welcher aufgrund der geringeren Kosten und der höheren Effizienz eine schnellere Umsetzung in die klinische Praxis haben könnte. Ein Protonenbunchmonitor, höherer Detektordurchsatz und eine quantitative Reichweitenrekonstruktion sind die weiteren Schritte in Richtung eines klinisch anwendbaren Prototyps, der signifikante Reichweitenunterschiede für die stärksten Bestrahlungspunkte detektieren könnte. Die experimentellen Ergebnisse unterstreichen das Potential dieser Reichweitenverifikationsmethode an einem klinischen Bleistiftstrahl und lassen diesen neuartigen Ansatz als eine vielversprechende Alternative auf dem Gebiet der in vivo Dosimetrie erscheinen
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Der volle Inhalt der QuelleOrdóñez, Müller Antonio Rafael [Verfasser]. „Close range 3D thermography: real-time reconstruction of high fidelity 3D thermograms / Antonio Rafael Ordóñez Müller“. Kassel : Kassel University Press, 2019. http://d-nb.info/1176532731/34.
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Der volle Inhalt der QuelleDenna rapport presenterar verktyg och komponenter som är nödvändiga för att vidareutveckla en implementation av en metod. Metoden försöker att använda en icke invasiv elektroglottografisk signal för att hitta snabba övergångar mellan röstregister. Det presenteras implementationer för sampelentropi och den diskreta fourier transformen för programspråket SuperCollider samt verktyg som behövs för att utvärdera metoden och presentera resultaten i realtid. Då olika algoritmer har använts för både klustring och cykelseparation så har även en jämförelse mellan algoritmer för dessa steg gjorts.
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Der volle Inhalt der QuelleMaster of Science
Convery, Ken. „Assessing Habitat Quality for the Endangered Red-cockaded Woodpcker“. Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/10136.
Der volle Inhalt der QuelleMaster of Science
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Der volle Inhalt der QuelleLlerandi-Román, Iván C. „Red-tailed Hawk home range, habitat use, and activity patterns in north-central Puerto Rico“. Master's thesis, Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.
Der volle Inhalt der QuelleHulin, Sofie. „Ekonomibyggnaders indelning i värdeområden vid taxering av lantbruk“. Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-21736.
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Der volle Inhalt der QuelleThe ethernet technology has vastly improved the capability to make real-time decisions during the flight of a vehicle. This asset combined with a PC telemetry data processor and the power of a high resolution graphics workstation, allows the decision makers to have a highly reliable graphical display of information on which to make vehicle related safety decisions in real-time.
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Der volle Inhalt der QuelleLee, Yu-Heng George. „DYNAMIC KERNEL FUNCTION FOR HIGH-SPEED REAL-TIME FAST FOURIER TRANSFORM PROCESSORS“. Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1260821902.
Der volle Inhalt der QuelleWalter, L. Abigail. „Factors influencing parental care and home range size of a monomorphic species, the Red-headed Woodpecker (Melanerpes erythrocephalus)“. VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/6000.
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