Dissertationen zum Thema „Reckoning“
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Villegas, Esperanza. „Dead Reckoning“. Digital Commons at Loyola Marymount University and Loyola Law School, 2010. https://digitalcommons.lmu.edu/etd/65.
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Jansson, Joel. „Dead Reckoning i bilspel“. Thesis, University of Skövde, School of Humanities and Informatics, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-1113.
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Denna rapport handlar om dead reckoning i bilspel. En rad nätverkstekniker tas upp grundligt, och fem olika versioner av dead reckoning implementeras, provkörs och utvärderas. En nätverkssimulator har skapats för att provköra algoritmerna i och datan från dessa provkörningar ligger till grunden för en analys av de olika implementationerna. De testas bland annat mot konsistens och bandbreddsåtgång. SimBins GTR Evolution har använts för att spela in loppen, och rapporten inriktar sig på hur dead reckoning fungerar i detta spel.
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Baker, James. „Dead reckoning using an accelerometer“. Thesis, Baker, James (2014) Dead reckoning using an accelerometer. Other thesis, Murdoch University, 2014. https://researchrepository.murdoch.edu.au/id/eprint/25673/.
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The project aim was to develop a technology that would provide a way of navigating when GPS signals could not be used. This includes tunnels, inside buildings and in the city. The proposed solution was to use a dead reckoning (an out dated method of navigating) to navigate using an accelerometer to detecting movement.
The accelerometer acceleration samples would be double integrated to work out distance travelled in each direction. That is up and down, left and right, forward and backwards. A microcontroller would be used to control the device as well as an LCD screen and memory (EEPROM). The controller would be able to store the data to memory allowing it to imported into Excel after an experiment where the data can be manipulated.
In the end a prototype was build but failed to produce accurate calculations. The accelerometer values were hard to calibrate and therefore small errors would encroach on the data. This caused huge problems when integrating and seemed to magnify the error. The prototype would then insist that it has travel vast distances when in fact it has barely moved or not moved at all.
At the end of this document there are future recommendations. First of foremost, the calibration needs to be more accurate if the prototype to work. The two keys ways this would happen is if more samples could be taken to calibrate the accelerometer and/or the calibration value could have more decimal places.
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Bodily, Kent D. Katz Jeffrey S. „Dead reckoning in a desktop virtual environment“. Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Psychology/Dissertation/Bodily_Kent_52.pdf.
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Banta, Larry Eugene. „Advanced dead reckoning navigation for mobile robots“. Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/19323.
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Devine, M. L. „A dead-reckoning system for automobile navigation“. Thesis, Cranfield University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309666.
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Rolfini, Riccardo. „Rassegna dei piu recenti sistemi di dead reckoning“. Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17679/.
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Il dead reckoning si suppone essere la più antica tecnica di navigazione sviluppata dall’uomo. Concettualmente basato sulla misura e successiva concatenazione degli spostamenti nel tempo, oggi viene applicato nella realizzazione di sistemi di navigazione basati su sensori inerziali (accelerometro e giroscopio) e altri sensori (magnetometro fra tutti), i quali permettono di ricavare velocità e direzione di spostamento istantanee.
In questa tesi viene presentata una rassegna di alcuni tra i più moderni sistemi di dead reckoning e di pedestrian dead reckoning con riferimenti al posizionamento indoor.
Si conclude che i primi sono destinati ad accumulare errore nel tempo ottenendo comunque ottimi risultati se realizzati con sensori costosi ma accurati, risultando invece addirittura inutilizzabili se basati su sensori particolarmente economici; l’impiego di altre tecnologie (GPS, Wi-Fi, Bluetooth...), spesso limitato dallo scenario di utilizzo, permette di ottenere un’elevata precisione anche in sistemi con sensori inerziali di bassa qualità. Tecniche di sensor fusion (filtri di Kalman, filtri a particelle...) si rendono indispensabili o almeno molto utili in ogni situazione.
Per i sistemi di pedestrian dead reckoning, che altro non sono che sistemi di dead reckoning limitati a scenari di utilizzo in cui l’utente si sposta camminando, valgono sostanzialmente le stesse conclusioni già indicate. Alcuni accorgimenti, derivanti dalla possibilità di rilevare i passi e calcolarne la lunghezza, rendono possibile ottenere sistemi molto precisi senza servirsi di sensori di fascia alta.
È quindi possibile realizzare sistemi di navigazione indipendenti dal contesto in grado di operare in assenza di GPS e riferimenti esterni. Il dead reckoning, però, non si limita a questo e può essere un valido contributo in sistemi più complessi che prevedano un’infrastruttura o, comunque, varie fonti di dati sulla posizione.
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Ramjattan, Allison Natasha. „Integrated GPS and dead reckoning for land vehicle navigation“. Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318180.
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Lazarevskiy, Alexander, und Олександр Андрійович Лазаревський. „Navigation dead reckoning system based on a mobile phone“. Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50760.
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1. S. Beauregard and H. Haas, “Pedestrian dead reckoning: A basis for personal positioning,” in Proceedings of the 3rd Workshop on Positioning, Navigation and Communication, March 2006, pp. 27–35.
2. A. R. Jimenez, F. Seco, C. Prieto, and J. Guevara, “A comparison of pedestrian dead-reckoning algorithms using a low-cost MEMS IMU,” in 2009 IEEE International Symposium on Intelligent Signal Processing, August 2009, pp. 37–42.
3. P. Kasebzadeh, C. Fritsche, G. Hendeby, F. Gunnarsson, and F. Gustafsson, “Improved pedestrian dead reckoning positioning with gait parameter learning” in 2016 19th International Conference on Information Fusion (FUSION), July 2016, pp. 379–385.
4. A. Brajdic, R. Harle, “Walk detection and step counting on unconstrained smartphones,” in Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing, September, 2013, pp. 225–234. https://doi.org/10.1145/2493432.2493449The problem of pedestrian dead reckoning (PDR) is referred to the class of individual navigation problems. The common solution in mobile phones is the use of satellite navigation (GPS, GLONASS, Galileo, etc.). But satellite signal sometimes can be jammed intentionally or lost due to obstacles in urban area. Also, the problem of PDR is interesting in the user localization in indoor environment such as large garages, city molls, etc. Instrumentation of smartphones is now based on Micro-Electro-Mechanical Sensors (MEMS) technology and includes standard set of Inertial Measurement Unit (IMU): accelerometers, gyroscopes, magnetometers and pressure sensor (optionally). Accelerometers can be used to detect step events and further to calculate lengths. But it is sensitive to walking speed, slope of the road, etc., which leads to inaccurate results of calculating the stride length. Also, as any dead reckoning technique PDR suffers from the cumulative error. Since the location estimate is always calculated based on the previous result, the error accumulates rapidly over time. This means that correction updates are necessary on regular basis.
Проблема обліку загибелі пішоходів (ОЗП) відноситься до класу індивідуальних проблем навігації. Загальним рішенням у мобільних телефонах є використання супутникової навігації (GPS, ГЛОНАСС, Galileo тощо). Але супутниковий сигнал іноді може бути заклинений навмисно або втрачений через перешкоди в міській місцевості. Крім того, проблема ОЗП цікава в локалізації користувачів у приміщенні, наприклад, у великих гаражах, міських торгових центрах тощо. Зараз прилади для смартфонів засновані на технології мікро-електромеханічні датчики (MEМД) і включають стандартний набір інерційних вимірювальних приладів (IВП): акселерометри, гіроскопи, магнітометри та датчик тиску (за бажанням). Акселерометри можна використовувати для виявлення крокових подій та подальшого обчислення довжин. Але він чутливий до швидкості ходьби, нахилу дороги тощо, що призводить до неточних результатів розрахунку довжини кроку. Крім того, як і будь-яка техніка розрахунок критичних випадків, ОЗП залежить від сукупної помилки. Оскільки оцінювання місця розташування завжди обчислюється на основі попереднього результату, помилка швидко накопичується з часом. Це означає, що необхідні регулярні оновлення виправлень.
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Kumar, Vijay. „Dead Reckoning Location Service For Mobile Ad Hoc Networks“. University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1040153270.
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Gülseven, Metin, und Viktor Davidsson. „Dead reckoning using trigonometry in a dual robot system“. Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-34469.
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In this thesis fundamental pieces of multi robot systems have been discussed and researched, in order to develop and build a system with easily obtainable electronics and to answer how much communication is needed as well as which design choices are important to make it robust. Our work will hopefully contribute to others in the community who are working with Raspberry Pi and Windows 10 IoT Core by being open source. As a result a proof of concept system of two simple robots has been implemented. In this paper we have used trigonometry and dead-reckoning for localization, when coordinating our robots a leader/follower model has been applied. The communication has been developed using the AllJoyn framework to develop an interface that has IoT capabilities. The results show that our system has working communication and simulated localization, however the limitations in the hardware results in an error in localization which we present in this paper. To answer our research questions the amount of communication needed is dependent on the problem and how many robots you need to apply in order to solve it and the most important design choice for current multi robot systems is a controlled environment.
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Hom, Andrew. „Reckoning ruin : international relations theorising and the problem of time“. Thesis, Aberystwyth University, 2013. http://hdl.handle.net/2160/47e312ff-fa0a-422f-9b0f-51eb6bdb3122.
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This thesis concerns the relationship between IR theory and time. More specifically, I scrutinise simultaneous and seemingly contradictory visions of Western Standard time, or clock time, and the problem of Time, understood as time’s natural propensity for bringing dissolution, discord, and death to human experience. I develop two primary wagers about these phenomena, and work through their implications to show how this ostensible contradiction results from tensions intrinsic to developing IR theories and recapitulates a venerable way of appraising time. The first wager is that all ‘time’ utterances result from symbolic representations of efforts to time various changes. In particular, a discursive emphasis on the problem of Time suggests that the timing activity being referred to is faltering or failing. The second wager is that narrative is a sort of timing activity integral to both retrospective understanding and lived experience. Narrative propounds a timing standard by which people orient themselves and act in the world, but is also itself the product of timing operations resulting in a temporal vision. After elaborating these wagers, I use them to examine the process of developing IR theories. First, I explicate IR as a narrative vocation by scrutinising disciplinary reactions to surprising change. Second, I address IR methodologies and find that various ways of reasoning use narratives to reduce time’s flow. Third, I unpack the narrative and temporal aspects of a variety of IR explanatory forms and show how each reconfigures the pitiable effects of time. Finally, I discuss how quantitative IR relies on narrative timing techniques to preserve symbolic connections to eternity in the face of temporal phenomena. These moves contextualise IR as a thoroughly narrative timing project whose viability hinges on its ability to placate, manage, or tame the problem of Time, which holds striking implications for IR as a social science.
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Wallberg, Daniel. „Dynamiskt tröskelvärde baserat på intresseområden för dead reckoning i racingspel“. Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-15391.
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Detta arbete undersöker synkroniseringstekniken dead reckoning i racingspel. Mer specifikt hur en variant, där objekts avstånd från varandra dynamiskt kontrollerar hur ofta de synkroniseras över nätverket, presterar gällande bandbreddsåtgång och konsistens jämfört med vanlig dead reckoning som alltid synkroniserar lika ofta. Det undersöks också hur banornas karaktär och egenskaper påverkar resultatet. Det visar sig att denna dynamiska dead reckoning har god potential att ge förbättringar gällande bandbreddsåtgång och att banornas utformning har stor inverkan över hur stor denna potential är.
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Kapaldo, Aaron J. „Gyroscope Calibration and Dead Reckoning for an Autonomous Underwater Vehicle“. Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34418.
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Autonomous Underwater Vehicles (AUVs) are currently being used for many underwater
tasks such as mapping underwater terrain, detection of underwater objects, and assessment
of water quality. Possible uses continue to grow as the vehicles become smaller, more agile,
and less expensive to operate. However, trade-offs exist between making less expensive,
miniature AUVs and the quality at which they perform. One area affected by cost and size
is the onboard navigation system. To achieve the challenges of low-cost rate sensors, this
thesis examines calibration methods that are suitable for identifying calibration coefficients
in low-cost MEMS gyros.
A brief introduction to underwater navigation is presented and is followed by the development
of a model to describe the operation of a rate gyro. The model uses the integral
relationship between angular rate and angular position measurements. A compass and two
tilt sensors provide calibrated angular position data against which the three single axis gyros
are compared to obtain an error signal describing errors present in the angular rate
measurements.
A calibration routine that adaptively identifies error parameters in the gyros is developed.
Update laws are chosen to recursively apply estimated error parameters to minimize the
system error signal. Finally, this calibration method is applied to a simple dead reckoning
algorithm in an attempt to measure the improvements calibration provides.Master of Science
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McIlraith, Caroline. „A Public Reckoning: Interior Design, Comedy, & the Common Good“. VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5490.
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This thesis investigates drinking water quality and the ways in which our built environment can be used to as a tool to alter or confront perception through the violation of expectations. Research indicates that the design of public interiors could be a key component in regulating healthy urban ecologies. Desire to understand the opposing needs of two user groups – the skeptic and the advocate – led me to research design prototypes that prioritize the unexpected as it is manifested in spectacle as underscored through proximity.
By abstracting this research, a new hypothetical design is formed in the form of a comedy lounge, water museum, and research laboratory that will evoke inclusivity, collaboration, and surprise. This reimagining of public programs will serve to invite users to be “in on the joke,” as well as, become participants in acts of reckoning, accountability, and conservation for the future of common goods like drinking water.
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Bettini, Guido. „Determinazione della posizione di un treno con dead reckoning di precisione“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
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Il sistema sviluppato ha come obiettivo l’implementazione del
sotto sistema di Odometria interamente su Field Programmable
Gate Array. Esso è necessario per la determinazione della posizione
del treno con Dead Reckoning di precisione. Il progetto svolto
all’interno dei laboratori Advanced Research Center On Electronic
Systems "Ercole De Castro", in collaborazione con Rete Ferroviaria
Italiana, si inserisce nel framework di sviluppo del settore,
definito dal Regolamento UE 2016/919 relativo alla specifica
tecnica di interoperabilità per i sottosistemi «controllo-comando
e segnalamento» del sistema ferroviario dell’Unione Europea
(ERTMS). Il carattere innovativo di questo progetto si riassume
in due risultati. Innanzitutto, per la prima volta il progetto
di un sottosistema Safety Critical di bordo viene implementato
totalmente su FPGA, e secondariamente anche tutta l’attività di
autodiagnosi ad esso correlata viene svolta su hardware. Tutto il
progetto è stato sviluppato e verificato seguendo il flusso rigoroso
indicato dal modello a V, come previsto dal livello 4 di Safety
Integrity (SIL4).
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Kirimlioglu, Serdar. „Multisensor Dead Reckoning Navigation On A Tracked Vehicle Using Kalman Filter“. Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614939/index.pdf.
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The aim of this thesis is to write a multisensor navigation algorithm and to design a test setup. After doing these, test the algorithm by using the test setup. In navigation, dead reckoning is a procedure to calculate the position from initial position with some measured inputs. These measurements do not include absolute position data. Using only an inertial measurement unit is an example for dead reckoning navigation. Calculating position and velocity with the inertial measurement unit is highly erroneous because, this calculation requires integration of acceleration data. Integration means accumulation of errors as time goes. For example, a constant acceleration error of 0.1 m/s^2 on 1 m/s^2 of acceleration will lead to 10% of position error in only 5 seconds. In addition to this, wrong calculation of attitude is going to blow the accumulated position errors. However, solving the navigation equations while knowing the initial position and the IMU readings is possible, the IMU is not used solely in practice. In literature, there are studies about this topic and in these studiessome other sensors aid the navigation calculations. The aiding or fusion of sensors is accomplished via Kalman filter. In this thesis, a navigation algorithm and a sensor fusion algorithm were written. The sensor fusion algorithm is based on estimation of IMU errors by use of a Kalman filter. The design of Kalman filter is possible after deriving the mathematical model of error propagation of mechanization equations. For the sensor fusion, an IMU, two incremental encoders and a digital compass were utilized. The digital compass outputs the orientation data directly (without integration). In order to find the position, encoder data is calculated in dead reckoning sense. The sensor triplet aids the IMU which calculates position data by integrations. In order to mount these four sensors, an unmanned tracked vehicle prototype was manufactured. For data acquisition, an xPC&ndash
Target system was set. After planning the test procedure, the tests were performed. In the tests, different paths for different sensor fusion algorithms were experimented. The results were recorded in a computer and a number of figures were plotted in order to analyze the results. The results illustrate the benefit of sensor fusion and how much feedback sensor fusion is better than feed forward sensor fusion.
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Khovacs, Ivan. „Divine reckoning in profane spaces : towards a theological dramaturgy for theatre /“. St Andrews, 2007. http://hdl.handle.net/10023/329.
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McLoughlin, Stephen Andrew. „Reckoning without the African : British development policy in Tanganyika, 1925-1950“. Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308972.
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Yu, Tkachenko O. „CORRELATION-EXTREME SYSTEM OF INERTIAL DEAD RECKONING CORRECTED BY LINEAR LANDMARK“. Thesis, ПОЛІТ.Сучасні проблеми науки.Гуманітарні науки:тези доповідей XVII Міжнародної науково-практичної конференції молодих учених і студентів:[y 2-x т.].Т.2(м.Київ,4-7 квітня 2017 р.)/[ред.кол.:В.М.Ісаєнко та ін.]; Національний авіаційний університет.-К.:НАУ,2017.-374 с, 2017. http://er.nau.edu.ua/handle/NAU/27740.
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The purpose of the work is to solve the problem of external orientation by searching linear landmarks on images of geophysical field, received from UAV. Currently existing navigation systems of unmanned aerial vehicles (UAVs) are characterized by a high dependency on the information received from the satellite navigation system (SNS), such as GPS/GLONASS.
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Hernández, Salgado Oziel. „Position Location Estimation in ad-hoc networks using a Dead Reckoning approach“. Monterrey : Tecnológico de Monterrey, 2006. http://biblioteca.itesm.mx/cgi-bin/doctec/listdocs?cor_ecurso=doctec:133302.
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Tesis (Master of Science Electronic Engineering Major in Telecommunications) -- Tecnológico de Monterrey, Campus Monterrey.Título tomado de la pantalla de presentación [como fue visto el 30 de agosto de 2006] También disponible en formato impreso.
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Martin, Daniel. „Reckoning with the past: the history and historiography of the Kisrawan uprising“. Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110403.
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Nearly two decades after the restoration of Ottoman rule in Greater Syria and the proclamation of the Tanzimat reform project, Mount Lebanon became the site of large sustained popular mobilizations. In the district of Kisrawan, villagers banded together under a central committee and expelled the ruling landowning families while claiming a space in the political structure of the Qa'immaqamiyya in direct reference to the Tanzimat reforms. This study positions itself against two dominant tendencies in the scholarship of the revolt which present the event either as a reaction to the destructive effects of European commercial action on Mount Lebanon's society, or as a result of new forms of political consciousness generated at the site of various imperial encounters which inadvertently opened the door to "popular" participation in the formerly closed domain of politics. This study seeks to locate the historical conditions which made this phenomenon possible at the interstices between longue-durée shifts in the region's social structure, and rapidly emerging dynamics in the period 1830-1860 which shaped the vast expansion of commercial relations and the political re-ordering of Mount Lebanon. I argue that the form, timing, and content of the political movement known as the "Kisrawan uprising" of 1858-1860, was intricately shaped within the context of expanding commercial relations and shifting boundaries of the "state" and "reform" as they were experienced by local actors. In doing so, this study attempts to re-think the forces shaping political movements in Mount Lebanon which have been characterized as a new form of popular engagement with "Tanzimat politics".Près de deux décennies suivant la restauration de la souveraineté Ottomane en Syrie, et la proclamation du projet de réforme Tanzimat, le Mont Liban est devenu le lieu des plus grandes mobilisations politiques populaires de l'histoire moderne de la région. Dans le district du Kisrawan au Mont Liban, les villageois se sont regroupés en un comité central et ont expulsé les cheikhs de la famille Khazin, les célèbres fermiers d'impôts du district, en revendiquant une place dans la structure politique du Qa'immaqamiyya, et ce en faisant directement référence aux discours des réformes Tanzimat. Cette étude se positionne contre deux tendances dominantes dans l'historiographie de la révolte : celle-ci présente l'évènement soit comme une réaction aux effets destructeurs de l'action commerciale européene sur la société du Mont Liban; soit une manifestation de nouvelles formes de conscience politique générées suite à diverses rencontres impériales qui, par inadvertance, ont ouvert la porte à la participation « populaire » dans un domaine autrefois fermée de la politique. Cette étude cherche à analyser les conditions historiques qui ont rendu ce phénomène possible dans les interstices des changements de longue-durée dans la structure sociale du Mont Liban, et des dynamiques émergentes dans la période 1830-1860, qui ont façonné le phénomène d'une vaste expansion de relations commerciales et de la politique de « restauration » au Mont-Liban. Je soutiens que la forme, et le caractère des demandes du mouvement politique de 1858-1860, a été façonné dans le contexte de l'expansion des relations commerciales, des frontières des institutions de « l'état », ainsi que l'expérience vécue des réformes par les acteurs locaux. Cette étude tente de repenser les forces historiques qui ont donné lieu à une nouvelle forme d'engagement populaire avec la politique du «Tanzimat.»
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McLoughlin, Stephen. „Reckoning without the African : British development policy in Tanganyika, 1925 to 1950“. Thesis, University of London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320883.
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Martucci, Francisco. „On-board recursive state estimation for dead-reckoning in an autonomous truck“. Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188907.
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Most of fully-autonomous vehicles are equipped with GPS devices in order to keep track of their exact location while driving towards any target destination. However, it is widely known that GPS systems are likely to fail under certain conditions, e.g., in long tunnels or during very bad weather conditions. In this master thesis work we present an Extended Kalman filter (EKF) framework for dead-reckoning in au-tonomous trucks equipped with a CPU, a gyroscope and four simulated sensors: a GPS, a magnetometer and two rotary encoders for velocity. The EKF will fuse the sensors measurements with a prediction that uses the kinematic model of a non-holonomic vehicle. In order to improve the estimation of the yaw angular position when a GPS outage is reported a new calibration method based on the rotation matrix is applied. This method is proven to e˙ectively decrease the error while driving in GPS denied environments.The tests are performed in a real-time embedded system, NI myRIO, that runs on-board of a 1:14 scaled Scania truck. The performance results confirm the correctness of our framework under short-term GPS outages, during many driving loops. Additionally, during long-term outages the estimation works pretty well for one loop and it has a good performance for multiple loops due to the unavoidable sensor drifting.De flesta av fullt autonoma fordon är utrustade med GPS-enheter för att hålla reda på sin exakta position när man kör mot ett mål destina-tion. Det är dock allmänt känt att GPS-system kommer sannolikt att misslyckas på vissa villkor, till exempel, under långa tunnlar eller under mycket svåra väderförhållanden. I detta examensarbete presenteras ett Extended Kalman filter (EKF) ramverk för dead-reckoning i autono-ma lastbilar utrustade med ett gyroskop och fyra simulerade sensorer: en GPS, en magnetometer och två roterande pulsgivare för hastighet. EKF:n kommer säkring sensorerna mätningar med en förutsägelse som använder den kinematiska modellen av ett icke-holonomiskt fordon. För att förbättra uppskattningen av gir vinkelposition när en GPS-avbrott rapporteras testade vi en ny kalibreringsmetod baserad på rotationsma-trisen. Denna metod har visat sig att e˙ektivt minska fel vid körning i GPS förnekade miljöer.Testerna utförs i en realtid inbyggda system, NI myRIO, som går ombord på en 1:14 skalade Scanialastbil. Prestanda resultat bekräf-tar riktigheten av våra ramverk under kortfristiga GPS avbrott, under många driv loopar. Dessutom, vid långtidsavbrottuppskattningen fun-gerar ganska bra för en slinga och har en bra prestanda för flera slingor på grund av den oundvikliga sensorn drifting.
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Walts, Dawn Simmons. „Time's reckoning time, value and the mercantile class in late medieval English literature /“. Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1185814575.
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Tunwattana, Noppadon. „Design and development of an optical dead reckoning system for robotics surface navigation“. Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556144.
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Dead reckoning systems are used for navigation of surface robots and these systems commonly rely on conventional odometry such as an encoder counting a number of wheel rotation. This simplicity makes dead reckoning both robust and economic when compared with other navigation systems based, for example, on inertial, landmark recognition or range finding techniques. However, errors can be introduced into dead reckoning systems through wheel slippage or skidding and through manufacturing imperfections of the wheels themselves. These problems of inaccuracy resulting from the use of conventional odometry have been addressed through the design of an optical dead reckoning system for robotic surface navigation. The optical computer mouse has previously been utilised in odometry systems but this has been further developed in an optical dead reckoning system. The use of an optical mouse in a non-contact, dead reckoning system for operation over rough surfaces has been investigated through a number of prototype developments. Systems based on coaxial optical arrangements and telecentric lens technology have been designed and tested. A case study has then been carried out into the application of a telecentric-based optical arrangement for the navigation of an underwater crawling ship hull robot. The prototype units and the case study have demonstrated the suitability of the optical mouse sensor for use in a non-contact odometry system suitable for use over uneven surface profiles.
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Enberg, David. „Performance Evaluation of Short Time Dead Reckoning for Navigation of an Autonomous Vehicle“. Thesis, Linköpings universitet, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-115881.
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Utilizing a Global Navigation Satellite System (GNSS) together with an Inertial Navigation System (INS) is today a common integration method to obtain a positioning solution for autonomous systems. Both GNSS and INS have benefits and weaknesses where the best parts from both systems can be combined with a Kalman filter. Because of this complementary nature, it is of interest to look at the robustness of the positioning solution when the Global Navigation Satellite System is temporarily not available. The aim of the thesis has been to investigate different vehicle models and to evaluate their short-time performance using a Dead Reckoning approach. The goal has been to develop a system for a Heavy Duty Vehicle (HDV) and to find out for which time interval a specific model can stay within a certain range when the GNSS is lost. A GNSS outage could for example happen when driving on a highway and passing signs, bridges and especially when driving inside tunnels. Also, for a solution to become commercially interesting, it must be cheap. Therefore, is it common to use so called Micro-Electro-Mechanical-Systems (MEMS) sensors which are of low-cost but suffer from biases, scale factors and temperature dependencies which must be compensated for. The results from the tests show that some models are able to estimate the position with good precision during short time GNSS outages whereas other models do not deliver the required accuracy. The main conclusion is that care should be taken when choosing the vehicle model so that it fits its usage area and the complexity needed to describe its motion. There are also lots of parameters to look at when investigating the best solution, where modeling of the low-cost sensors is one of them.
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Williams, Grant Tank. „Re-Imagining America : rural futurism, speculative fiction, And reckoning with a new era“. Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108954.
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Thesis: M.C.P., Massachusetts Institute of Technology, Department of Urban Studies and Planning, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 151-156).
At the close of 2016, the United States finds itself deeply fractured, caught between clinging to a nostalgic past and pushing for progressive possibility. As we stand divided, a set of emerging great challenges threaten to rapidly change the world as we know. At such a juncture, I argue that the practice of imagination can help us to break out of habitual thinking and routine practice to see our challenges, and ourselves within them, more fully and clearly. By imagining alternative futures, and communicating them to a broader audience through fiction, I propose we may better understand, collectively, how to enact our agency in the present to address these challenges head-on. In this thesis, I argue for the practice of imagination through the lenses of three great challenges that we face as a nation: politics, the Anthropocene, and a culture of white supremacy. In an effort to identify and bridge the divides that exist within our current political and cultural moment, I propose a 'rural futurism' that centers the experiences, settings, and lives of rural America in imagined futures. I then operationalize the concept of 'rural futurism' on two levels; 1) the realizable potential of local democratic institutions, the rural electric cooperatives, as sites for democratic discourse and self-determination, and 2) speculative futures, communicated through fictional narratives, as a tool for developing critical consciousness in addressing the three great challenges imperative to re-imagining America. I present eight speculative fiction stories of alternative rural futures set in the American south to 'test' the concept of 'rural futurism' as a tool for addressing these challenges. The stories were reviewed by a focus group of southern writers and organizers, who provide the analysis, as well as my personal evaluation, of the stories effectiveness in addressing the challenges described and their resonance with the experience and context of the rural American south.
by Grant Tank Williams.
M.C.P.
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Elliot, A. „Reckoning with the outside : emigration and the imagination of life in Central Morocco“. Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1380710/.
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This thesis explores migration as the abiding imaginative trope in the social life of the Tadla, a rural area of Central Morocco at the feet of the Atlas Mountains where emigration to Southern Europe has been pervasive since the 1980s. Complementing mainstream anthropological literature on migration, which tends to focus on the causes and effects of migratory flows in varied local settings, this study begins with the question of what migration is imagined to be in the first place, and characterises migration’s imposing role in social life through this specific ethnographic understanding. The thesis approaches the phenomenon of migration in the Tadla by grounding its investigation in the native concept of l-barra, ‘the outside’, a polysemic concept that signifies simultaneously specific geographical places (e.g. ‘Europe’), inexhaustible possibilities for better futures, and, more metaphysically, an entity with unique powers over people and things. Two main arguments guide this thesis with respect to l-barra. The first is that l-barra is the constitutive feature of an entire cosmology of migration in the Tadla, in relation to which not only migration but also life more generally is imagined. The second is that by virtue of its constitutive role as a horizon of and for the imagination, this ‘outside’ is also best delineated as an entity-cum-concept that affects social and intimate life in the Tadla in very concrete ways. To develop this argument, the thesis focuses in particular on how migration is both inflected by and in turn inflects local notions of gender and personhood. By tracing how l-barra is implicated in those very practices that define and qualify gendered subjects in the Tadla, the thesis suggests that, in the ethnographic context of Central Morocco, conceptions of gender do not only influence the process of migration, but are also in large part borne of it.
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Rumar, Tove, und Larsen Ludvig Juelsson. „Towards an improvement of BLE Direction Finding accuracyusing Dead Reckoning with inertial sensors“. Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-44776.
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Whilst GPS positioning has been a well used technology for many years in outdoor environments,a ubiquitous solution for indoor positioning is yet to be found, as GPS positioning is unreliableindoors. This thesis focuses on the combination of Inertial Sensor Dead Reckoning and positionsobtained from the Bluetooth Low Energy (BLE) Direction Finding technique. The main objectiveis to reduce the error rate and size of a BLE Direction Finding system. The positioned object is aMicro-Electrical Mechanical System (MEMS) with an accelerometer and a gyroscope, placed on atrolley. The accelerometer and gyroscope are used to obtain an orientation, velocity vector, andin turn a position which is combined with the BLE Direction Finding position. To further reducethe error rate of the system, a Stationary Detection functionality is implemented. Because of thetrolley movement pattern causing noise in the sensor signals, and the limited sensor setup, it is notpossible to increase the accuracy of the system using the proposed method. However, the StationaryDetection is able to correctly determine a stationary state and thus decreasing error rate and powerconsumption.GPS är en väl använd teknologi sedan många år, men på grund av dess bristande precision vid inomhuspositionering, behöver en ny teknologi för detta område hittas. Denna studie är fokuserad på Dead Reckoning som ett stöd till ett Bluetooth Direction Finding positioneringssystem. Det främsta målet är att minska felfrekvensen och felstorleken i BLE Direction Finding systemet. Föremålet som positioneras är en Micro-Electrical Mechanical System (MEMS) med en accelerometer och ett gyroskop, placerad på en vagn. Accelerometern och gyroskopet används för att erhålla en orientering, hastighetsvektor och därefter en position som kombineras med den position som ges av BLE Direction Finding. För att minska felfrekvensen ytterligare hos systemet, implementeras en funktionalitet som detekterar om MEMS-enheten är stillastående, kallad Stationary Detection. På grund av vagnens rörelsemönster, som bidrar till brus hos sensorsignalerna, samt den begränsade sensorkonfigurationen, är det inte möjligt att förbättra systemets precision med den föreslagna metoden. Dock kan Stationary Detection korrekt fastställa ett stationärt tillstånd och därmed minska felfrekvensen och energiförbrukningen för enheten.
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Livesay, Sarah Lindsay. „Literature as memorial: challenging histories and reckoning with absences through contemporary American literature“. Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/6982.
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What are the intersections between literary and memorial studies? This study interrogates that question by combining critical readings of contemporary American literature (1969-present) with national memorials. My method of reading moves between physical memorials that provide canonical representations of American historical events and textual memorials that provide literary counter-readings of the same events. These texts challenge traditional memorial-making by reframing the discourses for the ways memorials function in American culture.
The study of memorial traverses several disciplines and fields of scholarship. Within the broad field of memorial studies, this dissertation examines the concerns of physical monuments and memorials, memory and counter-memory, trauma and terror, place and community, and absence and haunting. Situating both literary and physical memorials within these interconnected frameworks offers an interdisciplinary and multidirectional understanding of what memorials can be, what they mean, and what they do in the contemporary era.
A useful way to understand how literature can be framed as memorial is through recognizing its overlap with Pierre Nora’s concept of “lieux de mémoire,” or sites of memory. Nora defines lieux de mémoire as sites where memory eternally lingers. These lieux “are fundamentally remains, the ultimate embodiments of a memorial consciousness” (12). Commemorative texts fall into this categorization because of their existence as purely symbolic objects that nevertheless address the many interests of history and memory. Literature utilizes imaginative and emotive modes to reframe the ways in which sites of memory can work in American culture. In this way, they become “the ultimate [embodiment] of a memorial consciousness.”
The literature analyzed in this dissertation enriches memorial studies by adopting forms of counternarrative as radical frameworks for thinking and rethinking American memorialization. Literature’s theoretical production of memorial contrasts with most national memorials’ physicality. Thus, it is worth considering how literary abstraction allows for different ways of responding to history and trauma. The literary memorial’s dialogic facilities allow it to be subversive without seeking legitimacy from the national organizations that typically approve of the nation’s large built memorials. Therefore, literature does not perform merely as memorial but also as countermemorial. The countermemorial challenges authoritative structures by questioning patriotic tropes, resisting nationalistic expression, and reconstructing historical understanding. In doing so, it posits lyric and fiction as valid methods of truth-telling and memorial-making.
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Ceolin, Martina. „The Multiple Facets of Time: Reckoning, Representing, and Understanding Time in Medieval Iceland“. Doctoral thesis, Háskóli Íslands, 2020. https://hdl.handle.net/10278/3734893.
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This work investigates the multivalent and dynamic portrayal of time in a selec-tion of early Old Icelandic texts from the twelfth and thirteenth centuries. The main objective is to map out the representations of time in terms of the pat-terns conveyed, and to examine how the authors configured time through nar-rative. An extension of this goal is to build up a theoretical understanding of how the people involved in the production of the texts, and possibly their contemporaries as well, reckoned, organized, and understood time.
The primary texts analysed for these purposes are Íslendingabók and two Íslendingasögur, Eyrbyggja saga and Laxdæla saga. Íslendingabók is a con-cise history of Iceland from its settlement, ca. 870, to 1118, written by the priest Ari Þorgilsson inn fróði (“the Learned,” 1067/68–1148) between the years 1122–33. The two Íslendingasögur, Eyrbyggja saga and Laxdæla saga, date from the thirteenth century, but, like Íslendingabók, are narratively set in the Settlement Period, although Íslendingabók continues further. The treatment of time in each text, especially the sense of the past, along with the explicit and implicit connections that can be established between the texts, allows for a comprehensive comparative analysis of the time patterns they convey. Along-side this analysis, a focus on the historical period of the writing of the texts leads to a deeper understanding of how medieval Icelanders of that time at once measured, managed, and understood time. This in turn allows for a bet-ter appreciation of the ideological foundations that influenced the representa-tions of time and the mechanisms involved in reconstructing the past in these texts.
The analysis is conducted by tackling the issue from different theoretical perspectives: narrative, sociological, and philosophical. Such an analytical ap-proach aims to do justice to the multiplicity of times that concurred in medie-val Iceland. This approach also attempts to bridge gaps that currently exist within this research area, paving the way for further explorations of the subject of time in medieval Icelandic literature and society, and, more broadly, of time as an existential concern and human experience in the Middle Ages.
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Flenniken, Warren S. Bevly David M. „Modeling inertial measurement units and analyzing the effect of their errors in navigation applications“. Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Thesis/FLENNIKEN_WARREN_52.pdf.
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Andersson, David, und Johan Fjellström. „Vehicle Positioning with Map Matching Using Integration of a Dead Reckoning System and GPS“. Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2226.
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To make driving easier and safer, modern vehicles are equipped with driver support systems. Some of these systems, for example navigation or curvature warning systems, need the global position of the vehicle. To determine this position, the Global Positioning System (GPS) or a Dead Reckoning (DR) system can be used. However, these systems have often certain drawbacks. For example, DR systems suffer from error growth with time and GPS signal masking can occur. By integrating the DR position and the GPS position, the complementary characteristics of these two systems can be used advantageously.
In this thesis, low cost in-vehicle sensors (gyroscope and speedometer) are used to perform DR and the GPS receiver used has a low update frequency. The two systems are integrated with an extended Kalman filter in order to estimate a position. The evaluation of the implemented positioning algorithmshows that the system is able to give an estimated position in the horizontal plane with a relatively high update frequency and with the accuracy of the GPS receiver used. Furthermore, it is shown that the system can handle GPS signal masking for a period of time.
In order to increase the performance of a positioning system, map matching can be added. The idea with map matching is to compare the estimated trajectory of a vehicle with roads stored in a map data base, and the best match is chosen as the position of the vehicle. In this thesis, a simple off-line map matching algorithm is implemented and added to the positioning system. The evaluation shows that the algorithm is able to distinguish roads with different direction of travel from each other and handle off-road driving.
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Stefan, Knutas. „Improving pedestrian navigation on iPhone in urban environments using deduced reckoning and turn detection“. Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170551.
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Pedestrian navigation on an iPhone today does not provide the accuracy to place the pedestrian on the correct side of a street. A deciding issue that prevents sufficient accuracy is the errors that occur when using satellite positioning in urban environments. Another big problem is that heading data has shown a tendency to be inaccurate. Chapter 2 explains satellites navigation, navigation techniques, and sensors. Chapter 4 describes how a prototype was developed. The prototype uses deduced reckoning and turn detection to navigate a pedestrian road network, without relying on satellite signals. The prototype is intended to run on iPhone 5 and utilizes accelerometer, magnetometer (compass), and gyroscope data together with detailed data about the pedestrian network to accurately track a pedestrian. It features a turn detection method that makes it possible to perform a logical traversal of the road network, together with step detection and step length estimation to move around. The turn detection method was very effective and gave good results when combined with logical traversal. For the two routes that were tested the total error in distance estimation was about 3~7 % and for both routes a close fit to the actual routes was achieved. For individual parts of the routes the largest distance estimation errors varied between 3 and 15 %.
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Wall, John H. „A study of the effects of stochastic inertial sensor errors in dead-reckoning navigation“. Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/WALL_JOHN_59.pdf.
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Ginn, Jody Edward. „Reckoning in the Redlands: the Texas Rangers’ Clean-up of San Augustine in 1935“. Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700074/.
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The subject of this manuscript is the Texas Rangers “clean-up” of San Augustine, which was undertaken between late January 1935 until approximately July 1936 at the direction of then newly-elected Governor James V. Allred, in response to the local “troubles” that arose from an near decade long “crime wave.” Allred had been elected on a platform advocating dramatic reform of state law enforcement, and the success of the “clean-up” was heralded as validation of those reforms, which included the creation of – and the Rangers’ integration into – the Texas Department of Public Safety that same year. Despite such historic significance for the community of San Augustine, the state, and the Texas Rangers, no detailed account has ever been published. The few existing published accounts are terse, vague, and inadequate to address the relevant issues. They are often also overly reliant on limited oral accounts and substantially factually flawed, thereby rendering their interpretive analysis moot in regard to certain issues. Additionally, it is a period of San Augustine’s history that haunts that community to this day, particularly as a result of the wide-ranging myths that have taken hold in the absence of a thoroughly researched and documented published account. Concerns over offending the descendants of the key antagonists, many of whom still live in the area, has long made local historians wary of taking on the topic. Nevertheless, many of them have privately expressed the need for just such a treatment, as they have crossed paths with enough evidence in pursuit of other topics that they recognize and appreciate the historical significance, and lack of an accurate modern understanding, of those events. Furthermore, descendants of some of the victims have expressed frustration over the lack of such an account, because it makes them feel victimized once more to see the mistreatment and suffering of their relatives, which shaped many lives within their families for generations, continue to be ignored in the local historical record. Those events did not occur in a vacuum, and their effects linger still.
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Moafipoor, Shahram. „Intelligent Personal Navigator Supported by Knowledge-Based Systems for Estimating Dead Reckoning Navigation Parameters“. The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1262043297.
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Gilbert, Brian J. „Fettering Ignatius to verse Donne's reckoning with the Spiritual exercises through his Holy sonnets /“. College Park, Md. : University of Maryland, 2008. http://hdl.handle.net/1903/8190.
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Thesis (M.A.) -- University of Maryland, College Park, 2008.Thesis research directed by: Dept. of English. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Al-Khudairy, Fawaz Wathiq Khattab. „Integrated positioning system (IPS) using route modelling scheme“. Thesis, University of Sussex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324200.
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Bandi, Kristian. „Soluzioni hardware e software per il dead reckoning di precisione in sottosistemi critici ferroviari SIL4“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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Il costante aumento del traffico ferroviario, dovuto alla grande richiesta di trasporto persone e merci, introduce il problema dell’aumento di capacità delle attuali infrastrutture. Onde evitare la costruzione di nuovi impianti, cosa che comporterebbe costi e tempi di realizzazione elevati, si vuole accrescere il numero di convogli circolanti sulle attuali diminuendo la distanza tra essi. Questo si traduce nell'incrementare la precisione nella localizzazione di un treno sui binari. A tal proposito l’azienda RFI - Rete Ferroviaria Italiana, in collaborazione con il centro di ricerca ARCES, sta sviluppando un nuovo sistema di localizzazione odometrica. L’innovazione di questo progetto risiede nell'integrazione di sensori inerziali, combinati con gli encoder tachimetrici, utilizzati per i calcoli di odometria.
Nella prima parte viene descritto lo sviluppo dell’ Hardware che ha la funzione di rilevare i segnali dai sensori tachimetrici e inerziali. La progettazione è stata effettuata rispettando le normative richieste per garantire il livello di sicurezza SIL4, ossia il più alto, ed aumentare la precisione nella localizzazione del convoglio. E’ stata scelta un’architettura ridondata due su due (2oo2 ), isolando galvanicamente le due parti, e con funzionalità di self testing, in modo da garantire una Probability of Failure per Hour non superiore a 10−9.
La seconda parte riguarda l’algoritmo di odometria, ovvero estrapolare un nuovo modello dai dati acquisiti dalla scheda tenendo conto dei fenomeni che inficiano la stima dello spazio percorso. L’obiettivo finale è diminuire l’intervallo di confidenza della stima utilizzando sensori inerziali. L’algoritmo è stato realizzato per dispositivi con architettura mista FPGA e MCU e secondo le norme richieste per garantire il livello di sicurezza necessario. I risultati ottenuti mediante simulazioni mostrano un miglioramento delle prestazioni, portando l’errore commesso dall'algoritmo allo stato dell’arte del 11.26% al 0.10%.
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Frantzen, Joey L. Ehresman Kenneth L. „Electronic maneuvering board and dead reckoning tracer decision aid for the officer of the deck /“. Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA397270.
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Thesis (M.S. in Computer Science--Naval Postgraduate School, Sept. 2001.Thesis advisor(s): Riehle, Richard D. ; Luqi. "September 2001." Includes bibliographical references (p. 195). Also Available online.
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Karpf, Brandon Allan. „Dead reckoning : where we stand on privacy and security controls for the Internet of Things“. Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111231.
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Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, Technology and Policy Program, 2017.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 201-218).
This thesis provides an analysis of privacy and security controls for internet-connected data-driven systems, known as the Internet of Things (IoT). The grounding theory is that numerous pre-existing privacy and security control methods -- not necessarily crafted for IoT -- will bear on the future of IoT privacy and security. This thesis covers fifteen case studies across six different control categories: Individual Choice, Command and Control Regulations, Operational Standards, Technical Standards, Compliance Frameworks, and Federal Authorities. These case studies reveal major deficiencies in current IoT privacy and security controls. IoT privacy and security controls lack a domain or contextual-use focus. Further, most current controls also fail to specify the risks or harms they intend to resolve. Therefore, the current IoT privacy and security controls induce a significant privacy and security market failure. This market failure is evident in recent IoT privacy and security events such as the Federal Trade Commission's cases against the IoT system developers TRENDnet and D-Link. I define three necessary paradigm shifts needed to improve IoT privacy and security controls. I also recommend a specific research endeavor to develop domain-, risk-, and harms-centric privacy and security standards. The realization of these paradigm shifts, and the products from this research endeavor, will navigate the IoT ecosystem towards more effective privacy and security control.
by Brandon Allan Karpf.
S.M. in Technology and Policy
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Frantzen, Joey L., und Kenneth L. Ehresman. „Electronic maneuvering board and dead reckoning tracer decision aid for the officer of the deck“. Thesis, Monterey, California. Naval Postgraduate School, 2001. http://hdl.handle.net/10945/1650.
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The U.S. Navy currently bases the majority of our contact management decisions around a time and manning intensive paper-based Maneuvering Board process. Additional manning requirements are involved on many Naval Ships in order to accurately convey the information to the OOD and/or the Commanding Officer. When given situations where there exist multiple contacts, the current system is quickly overwhelmed and may not provide Decision-Makers a complete and accurate picture in a timely manner. The purpose of this research is to implement a stand-alone system that will provide timely and accurate contact information for Decision-Makers. By creating a reliable, automated system in a format that is familiar to all Surface Warfare Officers we will provide the Navy with a valuable decision-making tool, while increasing ease of data exchange and reducing current redundancies and manning inefficient practices. Our software design is based upon the Unified Modeling Language (UML). UML allows us to construct a software model that is supported by the Ada programming language. Our design is based upon these fundamental tenants: Non- Operating System dependent, Non-Hardware System dependent, Extensible and Modular design. Ada provides a certified compiler, making our code robust and assuring the βbuyerγ that the program does what we advertise it to do.US Navy (USN) authors
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A'Hearn, Thomas. „Reckoning Time in the Barber Shop:A Qualitative Study of a Barber Navigating Time, Temporality, and Rhythm“. The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1386773352.
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Persson, Lucas, und Sebastian Markström. „Indoor localization of hand-held Shopping Scanners“. Thesis, KTH, Data- och elektroteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208931.
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This thesis investigates applicable indoor navigation systems for the next generation of hand-held shopping scanners, on behalf of the company Virtual Stores. The thesis research and review applicable indoor localization methods and ways to combine and evaluate received localization data in order to provide accurate navigation without introducing any other worn equipment for a potential user. Prototype navigation systems was proposed, developed and evaluated using a combination of carefully placed radio transmitters that was used to provide radio based localization methods using Bluetooth or UltraWide Band (UWB) and inertial sensors combined with a particle filter. The Bluetooth solution was deemed incapable of providing any accurate localization method while the prototype using a combination of UWB and inertial sensors proved promising solution with below 1m average error under optimal conditions or 2.0m average localization error in a more realistic environment. However, the system requires the surveyed area to provide 3 or more UWB transmitters in the line of sight of the UWB receiver of the user at every location facing any direction to provide accurate localization. The prototype also requires to be scaled up to provide localization to more than 1 radio transmitters at the time before being introduced to the Fast moving consumer goods market.Denna avhandling undersöker tillämpliga inomhusnavigationssystem för nästa generations handhållna shopping terminaler, på uppdrag av företaget Virtual Stores. Avhandlingen undersöker och granskar tillämpliga inomhuslokaliseringsmetoder och sätt att kombinera och utvärdera mottagna lokaliseringsdata för att bistå med ackurat navigering utan att introducera någon ytterligare utrustning för en potentiell användare. Prototypnavigationssystem föreslogs, utvecklades och utvärderades användandes en kombination av väl utplacerade radiosändare användandes Bluetooth eller UltraWide Band (UWB) och tröghetssensorer i kombination med ett partikelfilter. Bluetooth-lösningen ansågs oförmögen att tillhandahålla någon exakt lokalisering medan prototypen som använde en kombination av UWB och tröghetssensorer visade sig vara en lovande lösnings med under 1m genomsnittligt fel under optimala förhållanden eller 2,0m genomsnittligt lokaliseringsfel i mer realistisk miljö. Systemet kräver emellertid att det undersökta området tillhandahåller 3 eller fler UWB-sändare inom synfältet för UWB-mottagaren hos användaren vid varje plats och riktning för att tillhandahålla ackurat lokalisering. Prototypen behöver skalas upp för att kunna bistå med lokalisering till mer än 1 radiomottagare innan den introduceras till detaljhandlen.
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Cayli, E. „Building witnesses : Turkey's architecture of "facing and reckoning with the past" in the case of Sivas '93“. Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1467247/.
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This dissertation investigates architecture’s role in negotiating socio-political atrocities. It focuses on a case from Turkey, an arson attack that took place on 2 July 1993 in the city of Sivas. The site of this attack, the Madımak Hotel, has the quality of a prototypical case among the several sites of atrocity in Turkey, which, over the past couple of decades, have become subject to memorialisation projects—initially under the civil society discussions known as “facing and reckoning with the past” (geçmişle yüzleşme ve hesaplaşma) and later as part of a larger process of “post-coup democratisation” endorsed by the governing authorities. After continuing for many years to serve commercial purposes, in 2011 the Madımak Hotel was expropriated and turned by the state into a Science and Culture Centre, and an entire section of it called the “Memory Corner” was dedicated to the 1993 atrocity. The dissertation begins by analysing, both theoretically and empirically, the dynamics between violence and space. It discerns the inside-outside distinction as a fundamental material-spatial demarcation that has been both productive of and produced by the 1993 atrocity. The dissertation then goes on to study, through ethnography and archival research, the various spaces (both geographical and architectural) that have been subject to this demarcation and have hosted related examples of architectural memorialisation. These include the city and the building where the arson attack took place, a group of monuments and memorials across Turkey and in London, and those built in the aftermath of another atrocity in Germany that has come to serve as a reference case for the memorialisation debate in Turkey. The fundamental thesis is that the widespread opinion in Turkey that regards the judicial treatment of atrocities such as Sivas ’93 as flawed has imbued the sites where the atrocities took place (and those in which they are architecturally memorialised) with a quasi-judicial significance. The dissertation suggests that the material-spatial logic of memorialisation as a quasi-judicial force resembles rather than resolve that of the violence with which it is intended to help “face and reckon.” It concludes with a discussion of what this resemblance might imply as regards methodological and theoretical questions around temporality and agency in architectural memorialisation.
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布施, 光代, Mitsuyo FUSE, 幹也 林, Mikiya HAYASHI, 健太郎 石橋 und Kentaro ISHIBASHI. „空間的情報の符号化方略における発達的変化 : "Making Space" (Newcombe & Huttenlocher, 2000)から“. 名古屋大学大学院教育発達科学研究科, 2002. http://hdl.handle.net/2237/3138.
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Se, Heng-Kei. „They shall be neither early nor late : a study of the time reckoning system in the Qumran Calendrical Documents“. Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/30740.
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The study of the calendar has always been on of the key subjects in Qumran research. Eighteen Qumran manuscripts devoted solely to the calendar constitute an indispensable source of material for probing this important role. The aim of this thesis is to analyse a basic but vital aspect of the calendrical data in these Qumran Calendrical Documents: their system of time reckoning. The research of the thesis consists of two stages with different objectives. The first stage of textual study aims to provide a comprehensive and reliable reading for each document concerned. The second stage targets producing a well-evidenced perception of the time reckoning system in these documents. The aim of the initial stage is achieved by a detailed fragment study of each manuscript, comparing the best available readings with the photographs of the original fragments. The results form the requisite foundation for the subsequent analytical work. The target of the succeeding stage is accomplished by investigating three independent but interrelated areas of time reckoning. The investigation of the structure of the calendar confirms that all the Calendrical Documents agree on only one single calendrical structure that has 364 days a year, a fourth day of the week beginning for every year, and an identical quarterly structure of 30-30-31 days months. The analysis of the lunar material of these documents shows that they reckon the lunar cycle with a highly schematic model which is best represented by the formula: 364 days x 3 = 18 x 29 days + 18 x 30 days + 29 days + 1 day. The lunar cycle only functions as the object of enumeration but never as the regulator of the calendar in these texts. The search on the question of intercalation proves that there is no evidence in these documents that the calendar was ever intercalated to match the true solar cycle. The only scroll which is thought to provide the intercalary scheme turns out to be evidence for the non-intercalary nature of the calendar in these scrolls.
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Rondelli, Marco. „Studio di sistemi di posizionamento inerziale tramite sensori su smartphone“. Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13050/.
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Il documento è uno studio sui sistemi di posizionamento tramite l'utilizzo dei sensori degli smartphone androida. Inizialmente è presente un'analisi della situazione attuale dei sistemi di posizionamento con il richiamo a sistemi più conosciuti. All'interno è proposto un sistema basato sull'accelerometro che calcola lo spostamento sfruttando un'algoritmo di step-detection e un algoritmo basato sulle formule di fisica. Nel documento è stata descritta l'implementazione dell'applicazione e di tutto il background che ha contribuito alla creazione del sistema.