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Solomon, Ishan Samjeva Daniel. "Over-the-horizon radar array calibration." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phs689.pdf.
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Includes bibliographical references. Due to the rapid deployment of modern over-the-horizon radars, antenna/sensor position errors may be present and, since the antennas have a simple and cost-effective design, mutual coupling may also be present. These imperfections, which can degrade radar performance, form the basis of the investigation. Also calibrates the receiving array of the Jindalee over-the-horizon radar (located in Central Australia) using echoes from meteor trails.
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Liu, Bin-Yi. "HF Over-the-horizon radar system performance analysis." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Sep%5FLiu.pdf.
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Thesis (M.S. in Electronic Warfare Systems Engineering)--Naval Postgraduate School, September 2007.Thesis Advisor(s): Pace, Phillip E. ; Knorr, Jeffrey B. "September 2007." Description based on title screen as viewed on October 23, 2007. Includes bibliographical references (p. 99-102). Also available in print.
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Sun, Jingye. "'Over the THz Horizon' : thermal infrared technologies and applications." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/58865.
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Terahertz (THz) is loosely defined by the frequency range from 0.1 to 10 THz, and the 'over the THz horizon' thermal infrared from 10 to 100 THz is considered as an extension of the THz spectrum. This broad portion within the electromagnetic spectrum sees many applications due to its unique radiation characteristics. This thesis investigates the technologies and applications for the THz and the 'over the THz horizon' thermal infrared, and develops the proposed low cost thermal infrared 'THz Torch' spectrometer for material identification. In this thesis, the general background of the THz and extended THz spectrum, as well as the limiting factors for practical free-space THz applications and material characterizations from THz and infrared spectroscopy will be discussed in Chapter 1. State-of-the-art extended THz spectrum technologies, THz and infrared spectroscopy, atmospheric attenuations modelings and its applications will be reviewed in Chapter 2. In addition, the thermal infrared 'THz Torch' wireless secure communications system will also be reviewed. Chapter 3 will report on a research application-led study for predicting atmospheric attenuation, and tries to bridge the knowledge gap between applied engineering and atmospheric sciences. As a useful comparative baseline, Chapter 3 focuses specifically on atmospheric attenuation under pristine conditions, over the extended terahertz spectrum. Three well-known simulation software packages ('HITRAN on the Web', MODTRAN\textsuperscript{\textregistered}4 and LBLRTM) will be compared and contrasted. Techniques used for modelling atmospheric attenuation have been applied to investigate the resilience of (ultra-)wide fractional bandwidth applications to the effects of molecular absorption. Finally, with molecular emission included, carrier-to-noise ratio fade margins can be calculated for the effects of line broadening due to changes in macroscopic atmospheric conditions with sub-1 THz ultra-narrow fractional bandwidth applications. Outdoors can be far from pristine, with additional atmospheric contributions only briefly introduced here; further discussion is beyond the scope of this study, but relevant references have been cited. A comprehensive analytical review of methods for calculating the normalized power spectra, used to extract the effective complex dielectric properties of a sample will be undertaken in Chapter 4. Three generic power response models (zero-order, power propagation and electric field propagation) will be derived; these models act as a consolidated mathematical framework for the whole Chapter. With our unified engineering approach, the voltage-wave propagation, transmission line and telegrapher's equation transmission line models will be then independently derived; the first two giving the same mathematical solutions, while the third generates the same numerical results, as the exact electric field propagation model. Mathematically traceable simulation results from the various models will be compared and contrasted using an arbitrarily chosen dataset (window glass) from 1 to 100 THz. We will show how to extract the approximate effective complex dielectric properties using time-gated time-domain spectroscopy and also the exact values with our graphical techniques from the first-order reflectance and transmittance in Chapter 5. Our approach is then taken further by considering all the Fabry-Perot reflections with frequency- and space-domain spectroscopy. With scalar reflection-transmission mode infrared spectroscopy, the threshold conditions between the solution space that gives the single (exact) solution for the complex refractive index and that which gives multiple mathematical solutions will be modelled. By knowing threshold conditions, it is possible to gain a much deeper insight, in terms of sample constraints and metrology techniques that can be adopted, to determine the single solution. Finally, we propose a simple additional measurement/simulation step to resolve the ambiguity within the multiple solution space. Here, sample thickness is arbitrary and no initial guesses are required. The result from this work allows for the exact extraction of complex dielectric properties using simpler and lower cost scalar reflection-transmission mode spectroscopy. A thermal infrared spectrometer based on the 'THz Torch' concept will be introduced in Chapter 6. Both transmission and reflection modes of operation will be demonstrated within the extended THz range. Some preliminary experimental results, including the normalized power responses of common materials (e.g., fused silica), and paper and plastic banknotes will also be shown. In addition, a detailed power link budget analysis for the thermal infrared spectrometer will be discussed. Finally, several statistical techniques will be compared and contrasted to implement the material identification function of our spectrometer. The conclusions and further work relating to this thesis will be summarised in the last Chapter.
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Coley, Andrea L. "Minimizing WIP over a Rolling Horizon in a Job Shop." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-12162002-212521/.
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In this paper, a job shop scheduling problem with the objective of minimizing work in process (WIP) subject to meeting due dates constraints is evaluated in a rolling horizon setting. An iterative-adaptive deterministic simulation-based procedure is first used to obtain a feasible solution. This procedure, the Virtual Factory, has been shown to provide near-optimal solutions to industrial-sized problems in seconds for the criterion of minimizing maximum lateness, Lmax. Then, a simulated annealing post-processing procedure is used to determine when to release jobs to minimize WIP while keeping Lmax ≤ 0.
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Johnson, Cale, Brian Judy, Nathaniel Spurr, Joseph Gulledge, Paul Harris, Kyle Haubold, Jason Riner, et al. "Organic over-the-horizon targeting for the 2025 surface fleet." Thesis, Monterey, California: Naval Postgraduate School, 2015. http://hdl.handle.net/10945/45933.
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Approved for public release; distribution is unlimitedAdversarial advances in the proliferation of anti-access/area-denial (A2/AD) techniques requires an innovative approach to the design of a maritime system of systems capable of detecting, classifying, and engaging targets in support of organic over-the-horizon (OTH) tactical offensive operations in the 2025–2030 timeframe. Using a systems engineering approach, this study considers manned and unmanned systems in an effort to develop an organic OTH targeting capability for U.S. Navy surface force structures of the future. Key attributes of this study include overall system requirements, limitations, operating area considerations, and issues of interoperability and compatibility. Multiple alternative system architectures are considered and analyzed for feasibility. The candidate architectures include such systems as unmanned aerial vehicles (UAVs), as well as prepositioned undersea and low-observable surface sensor and communication networks. These unmanned systems are expected to operate with high levels of autonomy and should be designed to provide or enhance surface warfare OTH targeting capabilities using emerging extended-range surface-to-surface weapons. This report presents the progress and results of the SEA-21A capstone project with the recommendation that the U.S. Navy explore the use of modestly-sized, network-centric UAVs to enhance the U.S. Navy’s ability to conduct surface-based OTH tactical offensive operations by 2025.
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Shapland, A. J. "Over the horizon : human-animal relations in Bronze Age Crete." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/17579/.
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The iconography of Bronze Age Crete has long been noted for the abundance of animal imagery. The excavator of Knossos, Sir Arthur Evans, explained these depictions in terms of ‘nature-loving Minoans’: as part of the reassessment of long-held concepts in ‘Minoan’ archaeology this thesis offers a different framework for considering animals in Bronze Age Cretan material culture. Drawing on the interdisciplinary field of ‘animal studies’ it provides a perspective which foregrounds human-animal relationships, rather than the prevailing onesided view in which humans impose meanings on animals. The affordance concept, in which meanings arise from interaction, offers a balanced way to consider the relations between humans, animals and material culture. Sealstones, frescoes, zoomorphic figures, ceramic decoration, animal bones and written documents are all regarded as material traces of human-animal relations, each medium potentially implicated in different types of human-animal relationships or ‘animal practices’. Iconographic and statistical analysis are used to establish the potential significance of these traces: different types of animals are depicted in different ways and occur in varying frequencies in each medium. This demonstrates that they were used actively to convey information about animals rather than reflecting a passive interest in the natural world. The implications of this approach for an understanding of Bronze Age Cretan society are considered.
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Seegar, William D. "Deployable command and control system for over the horizon small boat operations." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FSeegar.pdf.
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Thesis (M.S. in Computer Science)--Naval Postgraduate School, September 2006.Thesis Advisor(s): Craig Martell, Gurminder Singh. "September 2006." Includes bibliographical references (p. 181-182). Also available in print.
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Green, Sean David. "Improving the range information of high frequency over-the-horizon skywave radar." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268265.
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Bodepudi, Sai Nisanth. "Average Link Rate Analysis over Finite Time Horizon in a Wireless Network." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/85104.
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Instantaneous and ergodic rates are two of the most commonly used metrics to characterize throughput of wireless networks. Roughly speaking, the former characterizes the rate achievable in a given time slot, whereas the latter is useful in characterizing average rate achievable over a long time period. Clearly, the reality often lies somewhere in between these two extremes. Consequently, in this work, we define and characterize a more realistic N-slot average rate (achievable rate averaged over N time slots). This N-slot average rate metric refines the popular notion of ergodic rate, which is defined under the assumption that a user experiences a complete ensemble of channel and interference conditions in the current session (not always realistic, especially for short-lived sessions).
The proposed metric is used to study the performance of typical nodes in both ad hoc and downlink cellular networks. The ad hoc network is modeled as a Poisson bipolar network with a fixed distance between each transmitter and its intended receiver. The cellular network is also modeled as a homogeneous Poisson point process. For both these setups, we use tools from stochastic geometry to derive the distribution of N-slot average rate in the following three cases: (i) rate across N time slots is completely correlated, (ii) rate across N time slots is independent and identically distributed, and (iii) rate across N time slots is partially correlated. While the reality is close to third case, the exact characterization of the first two extreme cases exposes certain important design insights.Master of Science
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Peterson, Dwight M. "The Merging of Multisource Telemetry Data to Support Over the Horizon Missile Testing." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608414.
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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, NevadaThe testing of instrumented missile systems with extended range capabilities present many challenges to existing T&E and training ranges. Providing over-the-horizon (OTH) telemetry data collection and displaying portions of this data in real time for range safety purposes are just a few of many factors required for successful instrumented range support. Techniques typically used for OTH telemetry data collection are to use fixed or portable antennas installed at strategic down-range locations, instrumented relay pods installed on chase aircraft, and instrumented high flying relay aircraft. Multiple data sources from these various locations typically arrive at a central site within a telemetry ground station and must be merged together to determine the best data source for real time and post processing purposes. Before multiple telemetered sources can be merged, the time skews caused by the relay of down-range land and airborne based sources must be taken into account. The time skews are fixed for land based sources, but vary with airborne sources. Various techniques have been used to remove the time skews associated with multiple telemetered sources. These techniques, which involve both hardware and software applications, have been effective, but are expensive and application and range dependent. This paper describes the use of a personal computer (PC) based workstation, configured with independent Pulse Code Modulation (PCM) decommutators/bit synchronizers, Inner-Range Instrumentation Group (IRIG) timing, and data merging resident software to perform the data merging task. Current technology now permits multiple PCM decommutators, each built as a separate virtual memory expansion (VME) card, to be installed within a PC based workstation. Each land based or airborne source is connected to a dedicated VME based PCM decommutator/bit synchronizer within the workstation. After the exercise has been completed, data merging software resident within the workstation is run which reads the digitized data from each of the disk files and aligns the data on a bit by bit basis to determine the optimum merged result. Both time based and event based alignment is performed when merging the multiple sources.This technique has application for current TOMAHAWK exercises performed at the Air Force Development Test Center, Eglin Air Force Base (AFB), Florida and the Naval Air Warfare Center/Weapons Division (NAWC/WD), Point Mugu, California and future TOMAHAWK Baseline Improvement Program (TBIP) testing.
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Walczak, Darius. "Dynamic control of inventories over finite horizon with an application to airline revenue management." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ56639.pdf.
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Hosoe, S. "LMI approach to an H∞-control problem with time-domain constraints over a finite horizon." IEEE, 1998. http://hdl.handle.net/2237/6797.
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Galinis, William J. "Fixed interval smoothing algorithm for an extended Kalman filter for over-the-horizon ship tracking." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27057.
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The performance of an extended Kalman filter used to track a maneuvering surface target using HFDF lines-of-bearing is substantially improved by implementing a fixed interval smoothing algorithm and a maneuver detection method that uses a noise variance estimator process. This tracking routine is designed and implemented in a computer program developed for this thesis. The Hall noise model is used to accurately evaluate the performance of the tracking algorithm in a noisy environment. Several tracking scenarios are simulated and analyzed. The application of the Kalman tracker to a tropical storm tracking is investigated. Actual storm tracks obtained from the Joint Typhoon Warning Center in Guam, Mariana Islands are used for this research
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Matusevicius, Tadas. "Analysis of Swedish Wind Power Forecast Quality over Forecast Horizon and Power System Operation Implications." Thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213706.
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Wind power, as one of the fastest growing means of generation, can oer environmentalbenets. However, due to its stochastic nature it is dicult to designaccurate prediction tools, thus the forecast errors are inherently present. Goodunderstanding of the errors that may occur is imperative for greater penetrationof wind power into the system as it can facilitate power system planning andoperation.In this paper, wind power forecasts for dierent price areas in Sweden areanalysed and compared. For this purpose, data starting November 2015 weredownloaded every hour from the Nord Pool spot database and Python code forparsing and analysis was written. Common indicators, such as the root-meansquare(RMSE) and bias error were used to characterise the accuracy of theforecasts. As expected, it was shown that in general the RMSE decreases as theforecast hour approaches the delivery hour. In addition, systematic bias erroraround the day-ahead market closure time was identied and discussed.The paper continues to analyse wind power forecast error distribution withrespect to the forecast time and dierent production levels. Four statistical momentsof distribution function were calculated and compared. It was shown thatfor the forecast horizons between 0 and 36 hours the forecast error distributionfunctions are negatively skewed leptokurtic.The temporal wind power forecast error correlations between dierent horizonsas well as the spatial correlations between dierent price areas are calculatedand discussed. As expected, a stronger correlation was identied betweenneighbouring price areas. In addition, correlation coecients between the forecasterrors and the up and down regulation prices were calculated.Finally, a model was developed to quantify the amount of operating reservelevel needed to compensate the uncertainty in the system due to wind powerand load forecasts. Future scenarios with an increasing wind power penetrationlevel are simulated and the amount of operating reserve level for individualprice areas is calculated. It was shown that with rapidly increasing wind powerpenetration, especially price area SE3 will need to plan for higher operatingreserve levels to successfully cope with the uncertainty in the load and windpower forecasts.Vindkraft, som den mest okande satt for elproduktion, kan skapa miljofordelar.Pa grund av sin stokastiska karaktar ar det svart att skapa ett exakt vindkraftprognosverktyg utan prognosfel. Lamplig uppfattning om fel ar avgorande foratt underlatta driften och planeringen av elsystemet.I den har uppsatsen analyseras och jamfors vindkraftprognoser for olika prisomradena i Sverige. Analys har utforts av data som hamtats fran och mednovember 2015 med en timmes mellanrum fran Nord Pool-spot databasen. Vanligaindikatorer, som RMSE (root-mean-square) och metodfel anvandes for attkarakterisera prognosens noggrannhet. Det visar att RMSE i allmanhet minskarnar prognostiden nar leveranstiden. Dessutom identierades och diskuteradessystematiska fel runt den dagen-forre marknaden's stangningstid.Uppsatsen fortsatter att analysera vindkraftprognosfelfordelning med hansyntill prognostid och olika produktionsnivaer. Fyra statistiska moment av fordelningsfunktionenberaknades och jamfordes. Det visades att for prognoshorisonternamellan 0 och 36 timmar ar prognosfelfordelningsfunktionerna negativaskevade leptokurtiska.Den tidsmassiga vindkraftprognosfelkorrelationen mellan olika horisonter samtde rumsliga korrelationerna mellan olika prisomraden beraknas och diskuteras.Som forvantat identierades en starkare korrelation mellan narliggande prisomraden. Dessutom beraknades korrelationskoecienter mellan prognosfel ochupp- och nedreguleringspriser.Slutligen utvecklades en modell for att kvantiera mangden av drift reservniva som behovs for att kompensera osakerheten i systemet pa grund avosakra vindkraft och lastprognoser. Framtidsscenarier med okande vindkraftspenetrationsniva simuleras och mangden driftsreservniva for enskilda prisomradenberaknas. Det visar att, med en snabbt okande vindkraftspenetration, sarskiltprisomradet SE3 kommer att behova planeras for hogre driftsreservnivaer foratt framgangsrikt klara osakerheten i last- och vindkraftprognoserna.
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Wolvaardt, Jacqueline Elizabeth (Liz). "Over the conceptual horizon of public health : a living theory of teaching undergraduate medical students." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/39798.
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The health needs of society extend beyond the treatment of the individual and the ill. These needs are at the core of public health which addresses health at a population-level. Regulations dictate that public health must be included in the South African medical curriculum, but healthy populations hold little interest for medical students. As a result public health remains over the conceptual horizon of medical students.
At the University of Pretoria the responsibility for the inclusion of public health is the responsibility of the School of Health Systems and Public Health. Participation in the medical curriculum is a minor but important part of my educational practice. But two of my professional values – care and agency – have been denied in that practice. The central purpose of the research was to construct the meaning of my educational practice with the aim of progressive realisation of my values.
The study explored how public health is conceptualised as a subject in the medical curriculum at the University of Pretoria, the intended educational achievements of public health in the curriculum and the optimal strategies for its inclusion.
An action research living theory design made use of a concurrent embedded mixed-methods approach. Data was gathered primarily from external experts, the academic staff of the School of Medicine and the SHSPH, key academic documents and the medical students.
A constructivist grounded theory approach was employed to construct meaning from the findings. The findings revealed the effect of the historical decision to split public health and medicine and the resulting increasing distance between the disciplines. Resting on this fractured foundation is the understanding of what public health is. The understanding of public health suggests a multiple concurrent understanding that is constructed by diverse and seemingly conflicting perspectives while the discipline remains identifiable as public health.
The curricular intentions of including public health in the medical curriculum at the University of Pretoria are characterised by a varied topography that includes externally and internally imposed educational tensions, constraints and intractable contradictions. Curricular intentions revolve around ontological aspirations. The medical students’
perspectives of their educational experience in public health are surprisingly similar to those of students in other countries.
The current and imagined strategies to include public health formed the basis for the scepticism of educational orthodoxy and suggested the exploration of the dual uncontested spaces – social media and the elective experience in the medical curriculum. The findings from my innovative practice in using the elective experience challenge the notion that public health is over the conceptual horizon of medical students. A theme that runs through the narrative suggests, instead, that other conceptual horizons obscure meaningful engagement with medical students around public health.
This research is a rich account of my complex context and my connected practice and through action research I claim to live my values of care and agency. My living theory of practice as a form of meaning making could help others to look over their own conceptual horizons in search of wholeness.Thesis (PhD)--University of Pretoria, 2013.
gm2014
Humanities Education
unrestricted
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Pinkepank, James Alan. "The applicability of neural networks to ionospheric modeling in support of relocatable over-the-horizon radar." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA286114.
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Reid, Robert. "Shallow Water Training Range." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608308.
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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, NevadaDuring the cold war, undersea warfare (USW) was perceived as a large-area, deep-water operation. The need for USW has recently shifted to the shallow water, littoral environment. Consequently, US naval forces must train to operate in these littoral environments where regional conflicts are most likely to occur. In light of these requirements the Shallow Water Training Range (SWTR) has been initiated. Telemetry is used in the following areas of SWTR: fiber optic, microwave, RF and underwater. Only phase 1 of 8 phases of the program is executing therefore SWTR is a good opportunity for telemetry industry involvement.
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Rohlén, Karl, and Pontus Ekdahl. "Uncovered Interest Parity and the Financial Crisis of 2007 : An econometric study of the robustness of the uncovered interest parity over different time periods, with varying economic stability." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Nationalekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-44249.
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The current intellectual climate regarding economics seems to be at an agreement regarding the theory of uncovered interest parity and its unreliability within real life application. The purpose of this thesis is to test how the theory holds over periods with varying economic stability, both using a short- and long-horizon test in order to establish the usefulness of uncovered interest parity as a predictor for exchange rate movements. The short-horizon test will utilize the interbank offering rate, and the long-horizon test the yield to maturity of government 10-year benchmark bonds as the interest rate. The sample period is 2000 to 2018, covering the financial crisis of 2007. We will focus on three different time periods: pre-crisis, crisis and post-crisis. We will use ordinary least squares (OLS) regression and an extreme sampling. From the regressions we conclude that most of the time periods move against the uncovered interest parity, where only the crisis period is in line with the theory. The extreme sampling supports this result, as larger interest differentials provide the rational expectations with more predictive power of the future spot exchange rate.
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Pérez-Falcón, Tony, and Ray Kolar. "Flight Safety System for Unmanned Air Vehicle." International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/605594.
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International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, NevadaA Flight Safety System (RAFS) for multiple, reliable Unmanned Air Vehicles (UAV’s) capable of flying Over-the-Horizon (OTH) and outside test range airspace. In addition to the flight safety application, the described full-duplex data link is suitable as a backup command and control link for UAV’s, and for sensor control & data exfiltration. The IRIDIUM satellite system was selected to provide the communications link and because of its global coverage and requisite data throughputs. A Risk Reduction activity ensued to quantify IRIDIUM performance. Hardware and software was developed to demonstrate the feasibility of using IRIDIUM in a flight safety scenario.
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Pérez-Falcón, Tony, and Ray Kolar. "FLIGHT SAFETY SYSTEM FOR UNMANNED AIRBORNE VEHICLES (UAVs)." International Foundation for Telemetering, 2002. http://hdl.handle.net/10150/607509.
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International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, CaliforniaThis paper presents a Flight Safety System (FSS) for multiple, reliable Unmanned Air Vehicles (UAV’s) capable of flying Over-the-Horizon (OTH) and outside test range airspace. Expanded uses beyond flight safety, such as UAV Air Traffic Control, are considered also. This system satisfies the operational requirement for a Hazard Control Communication Channel as well as providing a reverse communications channel to provide Safety Critical Information to the Range Safety Officer (RSO). Upon examining 60 communications candidates, IRIDIUM accessed through a Data Distribution Network (DDN), with ARINC being a potential service provider, is recommended.
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Sullivan, Arthur, and William C. Turner. "EYE IN THE SKY: AIRSHIP SURVEILLANCE." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608425.
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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, NevadaThe first airship was invented and designed in 1852 by Henri Giffard, a French engineer. Airships were used by both the Allied and German military for surveillance and bomb dropping in WWI. There was a steady increase in airship use up until the Hindenburg exploded while docking in 1937 at Lakehurst, New Jersey. This tragedy almost ended the use of airships. Significant use of airships next occurred during WWII for submarine surveillance and depth charging. Airships for advertising, surveillance, and command control came of age in the late 1980s and early 1990s. Airships can be fitted with several telemetry options or instrumented with sensor systems for surveillance purposes. The telemetry or sensor data can be relayed, real-time, to a remote station as much as 150 km from the airship either encrypted or plain when cruising at 3000 feet altitude. Small vehicles (3 meters long) can be detected at 50 km using radar; 12 km using FLIRs; and, depending on weather conditions and real-time imaging processing, up to 20 km using video cameras. Cooperating airborne targets can be tracked out to 150 km. The major advantages of the airship over conventional aircraft are: • ENDURANCE Up to 20 hours without refueling. • LOW OPERATING COST Less than the cost of a helicopter. • SHOCK-FREE ENVIRONMENT Allows commercial electric equipment usage. • VIBRATION-FREE ENVIRONMENT Yields personnel comfort and endurance. • SAFETY Safer than any aircraft, automobile, or bicycle.
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Coble, Ann Louise. "The lexical horizon of "one in Christ" the use of Galatians 3:28 in the progressive-historical debate over women's ordination /." Theological Research Exchange Network (TREN), 1994. http://www.tren.com.
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Garcia, Gilbert O. Joseforsky David C. "Transformational communications architecture for the Unit Operations Center (UOC) ; Common Aviation Command and Control System (CAC2S) ; and Command and Control on-the-move Network, Digital over-the-horizon Relay (CoNDOR) /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FGarcia%5FJoseforsky.pdf.
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Joseforsky, David C., and Gilbert O. Garcia. "Transformational communications architecture for the Unit Operations Center (UOC), Common Aviation Command and Control System (CAC2S), and Command and Control On-the-Move Network, Digital Over-the-Horizon Relay (CoNDOR)." Thesis, Monterey California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1586.
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Approved for public release, distribution is unlimitedThe purpose of this research was to introduce a Transformational Communications Architecture for the Unit Operations Center (UOC); Common Aviation Command and Control System (CAC2S); and Command and Control On-the- Move Network, Digital Over-the-Horizon Relay (CoNDOR). The methodology used was to conduct Field Tests with government contractors and private vendors in order to demonstrate the capabilities of each wireless technology researched. These wireless technologies, Free Space Optics (FSO), Microwave, 802.16, 802.11b over SecNet-11, Orthogonal Frequency Division Multiplexing (OFDM), Broadband Satellite, INMARSAT, and Iridium, all have the potential of being implemented in the transformational communications architecture for intra-nodal and inter-nodal links for UOC and CAC2S, as well as the CoNDOR communications architecture. The ultimate goal of this research was to introduce different technologies that offer more flexibility, mobility, and capability at the tactical level giving the Marine Corps the tactical wireless edge. Throughout this research, the focus revolved around testing equipment and network configurations in an IP network. Special consideration was given to wireless issues for the UOC, CAC2S, and CoNDOR, which could improve line-of-sight, beyond line-of-sight, and over-the-horizon communications for each program. These new technologies will transform communications in the United States Marine Corps for the 21st century.
Captain, United States Marine Corps
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Holmberg, Andreas. "Luftförsvar för stärkt kustförsvar : En studie om burna Lv-robotsystem i amfibiebataljonen." Thesis, Försvarshögskolan, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-7588.
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The traditional landings with large warships near the coastline have been replaced by means of vessels moving beyond the horizon from the coast where the landing will take place. The old landing crafts have been replaced by transport helicopters and close air support, a threat that the amphibious battalion lacks resources to meet. The Swedish Armed Forces faces a possible acquisition of MANPADS and therefore the main purpose with this study was to examine the systems: FIM-92 Stinger RMP, Mistral and RBS70 NG, in order to assess which one of them who had the greatest potential to be effective when used by the amphibious battalion in a coastal defense operation. The study was conducted as a multiple criteria decision analysis, based on the concept of military utility. The result indicated that the RBS70 NG was the system that best met the requirements and demonstrated the greatest potential to be military efficient, although Mistral with minor exceptions fulfilled the requirements. As the study was delimited to a theoretical study based on three specific scenarios, further studies are recommended with simulations, as well as field trials before the result can be given a higher validity. The result, however, already helps us to understand how MANPADS contributes with military utility in coastal defense operations.De traditionella landstigningarna med stora fartyg uppträdandes kustnära har ersatts med metoder innebärandes att fartygen rör sig bortom horisonten från den kust där landsättningen/landstigningen ska ske. De gamla landstigningsbåtarna har i hög grad ersatts med helikoptrar som understödda av attackhelikoptrar och flygplan utgör den nya dimensionerande hotbilden. En hotbild som amfibiebataljonen saknar resurser för att möta. Då Försvarsmakten står inför en eventuell anskaffning av ett buret luftvärnssystem till amfibiebataljonen har denna undersöknings främsta syfte varit att bedöma vilket av systemen FIM-92 Stinger RMP, Mistral eller RBS70 NG som uppvisat störst potential att vara militärt effektivt när de nyttjas av en amfibiebataljon i kustförsvarsoperationer. Undersökningen genomfördes som en komparativ analys med multimålmetod och tre olika typfall som grund. Jämförelsen tog sin utgångspunkt kring teoribildningen om militär nytta och då mer specifikt militär effektivitet. Resultatet indikerade att RBS70 NG var det system som bäst mötte amfibiebataljonens krav och därmed uppvisade störst potential att vara militärt effektivt, även om Mistral med enstaka undantag också uppfyllde kraven till synes utan begränsningar. Då studien avgränsats till en teoretisk jämförelse i tre specifika typfall, rekommenderas fortsatta studier med såväl simuleringar som praktiska prov innan resultatet kan ges en högre validitet. Resultatet bidrar däremot redan nu till en förståelse för vad som ökar den militära effektivitetenvid genomförande av kustförsvarsoperationer.
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Grelck, John, Eldon Ehrsam, and James A. Means. "Space Tracking Systems/ Options Study." International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/611727.
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International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, CaliforniaThis paper presents the findings of the Space Tracking Systems/Options Study (STS/OS) and indicates its impact on the telemetering community. The STS/OS was commissioned by Air Force Test & Evaluation (AF/TE) to develop a long range plan (vision and roadmap) for the AF Test & Evaluation (T&E) community to ensure affordable capabilities (telemetry, tracking and commanding) for the future (2003-2008). The study was conducted by the Air Force Materiel Command (AFMC), Space & Missile Systems Center (SMC), Detachment 9, at Vandenberg AFB (VAFB), with support from the primary AFMC T&E centers, the Air Force Operational Test & Evaluation Command (AFOTEC), and the Air Force Space Command (AFSPC). Both "open air" aeronautical and astronautical test needs were considered. The study solicited requirements for existing and future programs, extrapolated existing and planned test capabilities out into the future, then compared the two to identify future shortfalls in capabilities and specific actions that are necessary to insure that the future program needs can be met. Three critical types of testing were identified that cannot be satisfied with existing or planned instrumentation. These are: large area testing (LAT), over the horizon testing (OTH), and space weapons testing (SWT). A major deficiency was also uncovered in end game scoring for air and space intercepts, where inadequate capability exists to perform the required vector miss-distance measurement. This paper is important to the telemetering community because it identifies the Global Positioning System (GPS) as the primary time space position information (TSPI) system for all future open air testing. GPS provides a passive capability that permits each vehicle to determine its own precise TSPI. Means must be provided, however, for the vehicle to relay its position to the appropriate range control center. The paper shows that the problems with down linking telemetry, aircraft buss data, digital audio, digital video, and TSPI collectively represent the need for a very capable datalink. Likewise, the need to uplink commands, synthetic targets, synthetic backgrounds, and target control information also represents the need for a very capable datalink. With its extensive expertise in RF linkages, the telemetering community is ideally suited to address this need for a robust datalink for the future of T&E.
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Fernández, González Enrique Ph D. Massachusetts Institute of Technology. "Generative multi-robot task and motion planning over long horizons." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115594.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2018.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 291-299).
The state of the art practice in robotics planning is to script behaviors manually, where each behavior is typically precomputed in advance. However, in order for robots to be able to act robustly and adapt to novel situations, they need to be able to plan sequences of behaviors and activities autonomously. Since the conditions and effects of these behaviors are tightly coupled through time, state and control variables, many problems require that the tasks of activity planning and trajectory optimization are considered together. There are two key issues underlying effective hybrid activity and trajectory planning: the sufficiently accurate modeling of robot dynamics and the capability of planning over long horizons. Hybrid activity and trajectory planners that employ mixed integer programming within a discrete time formulation are able to accurately model complex dynamics for robot vehicles, but are often restricted to relatively short horizons. On the other hand, current hybrid activity planners that employ continuous time formulations can handle longer horizons but they only allow actions to have continuous effects with constant rate of change, and restrict the allowed state constraints to linear inequalities. This greatly limits the expressivity of the problems that these approaches can solve. In this work we present Scotty, a planning system for hybrid activity and trajectory planning problems. Unlike other continuous time planners, Scotty can solve a broad class of expressive robotic planning problems by supporting convex quadratic constraints on state variables and control variables that are jointly constrained and that affect multiple state variables simultaneously. In order to efficiently generate practical plans for coordinated mobile robots over long horizons, our approach employs recent methods in convex optimization combined with methods for planning with relaxed planning graphs and heuristic forward search. The contributions of this thesis are threefold. First, we introduce a convex, goal-directed scheduling and trajectory planning problem. To solve this problem, we present the ScottyConvexPath planner, which reformulates the problem as a Second Order Cone Program (SOCP). Our formulation allows us to efficiently compute robot trajectories with first order dynamics over long horizons. While straightforward formulations are not convex, we present a convex model that does not require state, control or time discretization. Second, we introduce the ScottyActivity planner, a state of the art hybrid activity and trajectory planner that interleaves heuristic forward search with delete relaxations and consistency checks using our convex model. Finally, we present ScottyPath, a qualitative state plan planner that computes control and obstacle-free state trajectories for robots in order to satisfy the temporally extended goals and constraints that ScottyActivity imposes. ScottyPath finds obstacle-free paths in which all robots are guaranteed to always remain within obstacle-free safe regions, which are computed in advance. We introduce several new robotic planning domains, that we use to evaluate the scalability of our planning system and compare the performance of our approach against other prior methods. Our results show that ScottyActivity performs similarly to other state of the art heuristic forward search activity planners, while solving much more expressive robotic planning problems. On the other hand, ScottyPath can generate obstacle-free paths where robots are contained in obstacle-free convex regions more than two orders of magnitude faster than alternative mixed-integer approaches.
by Enrique Fernández González.
Ph. D.
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Larsen, Randy R. "The Role of Nature in John Muir's Conception of the Good Life." Antioch University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1316547924.
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Chan, Chun Keung. "A study of the relationship between volatility premium and option returns over different time horizons: an ex-post and ex-ante empirical analysis using bid-ask data." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/307.
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There are three distinct avenues of empirical research relating to option returns. (1) attempts to explain option returns; (2) analysis of models forecasting option implied volatility (IV) versus alternative forecasts of futures realized volatility (RV); and (3) estimation of the economic benefit of volatility forecasting. This study shows that the three apparently disparate fields of research are closely related since option returns are positively related to volatility spread, and asset returns are negatively related to volatility shock. We show that IV outperforms, and indeed subsumes, a subset of time-series historical volatility (TS-HV) forecasts in predicting RV, although the finding that TS-HV does not provide incremental information in forecasting RV, the use of the alternative predictor can enhance the economic profit to option traders. The study also shows that option horizons significantly affect the impact of option mispricing and market direction on option returns. We provide incremental evidence that puts are more expensive than calls and reinforce the argument that pricing asymmetry can be attributed to the greater skewness of put returns due to a negative return-volatility relationship.
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Kulani, Anjani. "Towards Longitudinal Control for Over-the-horizon Autonomous Convoying." Thesis, 2013. http://hdl.handle.net/1807/42991.
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In a variety of military operations, a convoy of autonomous followers may need to traverse the leader's path without using Global Positioning System (GPS), lane markers/magnets and/or a vision-based vehicle-following system. This can be achieved by using Visual Teach and Repeat (VT and R), which provides an effective method for autonomous repeating of a previously driven path. This thesis describes the design of a distributed control system that uses the idea behind the VT and R method to allow a convoy of inter-communicable autonomous vehicles to follow a manually-driven lead vehicle's path with a desired inter-vehicle spacing, even when the leader is not in the camera view of the followers. The longitudinal controller is designed for addressing a 1D spacing problem and then combined with a path tracker for tracking a path in a 2D environment. The designed control model is tested in simulations.
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Davey, Samuel Jarrod. "Extensions to the probabilistic multi-hypothesis tracker for improved data association / Samuel J. Davey/." 2003. http://hdl.handle.net/2440/21603.
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"September 2003"Bibliography: leaves 209-216.
xxvi, 216 leaves : ill. ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
This thesis has introduced a number of enhancements to the PMHT algorithm, motivated by the Over the Horizon Radar tracking problem. The two primary enhancements are the incorporation of classification information, and the introduction of a discrete state model for the assignment prior probability. The modified PMHT algorithms achieved through these enhancements are referred to as PMHT-c and PMHT-y respectively.
Thesis (Ph.D.)--University of Adelaide, School of Electrical and Electronic Engineering, 2003
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Dai, Chia-Wei, and 戴家威. "FMCW Signal Processing with Applications to Over-The-Horizon/Automotive Radars." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/71197619245519862216.
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碩士國立交通大學
電信工程研究所
100
In recent years, frequency modulated continuous wave (FMCW) signal processing technique becomes a popular technique in target estimation. However, in practice, environments limit the performance of radar systems. In this thesis, we focus on the FMCW signal processing with applications to over-the-horizon (OTH) and automotive radars. In OTH radars, a continuum bandwidth for achieving the desired range resolution is difficult to find and the sea clutter phenomena will dominate the detection performance of radar systems. In automotive radars, only a small number of snapshots are available for direction-of-arrival (DOA) estimation in high mobility scenarios. To tackle these problems, we propose a multi-frequency FMCW transceiver for OTH radars and a low complexity single-snapshot maximum likelihood (ML) DOA estimator based on the phase-comparison technique for automotive radars. Finally, computer simulation results are included to confirm the effectiveness of the proposed method.
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JIANG, YU-TING, and 江瑜庭. "Wandering Over the Horizon ─ Primordial Observation about the Study of Chinese Painting." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/qx2739.
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碩士國立臺灣藝術大學
書畫藝術學系
106
Abstract The representation of art, instead of copying like what a camera can do, is much more unique and extraordinary when it comes to expression of thoughts in our minds. While creating, we interact with the audience or viewers through the connection of emotions. In this essay, children scribble is discussed and analyzed to understand that the pure pathos of children scribble could differ as children undergo different physical development phases and that it represents abundant emotions from kids. Children view things simply and present their thoughts or feelings directly through art; hence their art works are mostly rich in freshness and childlike aroma. Due to the progress of civilization and the pressure from the society, people have turned to plain, childlike art style, which is like clear stream that can help refresh modern people's minds and relieve the tension. In the second chapter of this essay, charts is used to analyze the relation between children's cognition and the development of their art creating phases. As the symbol of growth and maturity, the horizon is here to be used to represent the techniques in children scribble which has three main features: the strain of deformation, the out-of-box imagination, and the mono-angle of view to the multi-angle of view. With these three characters, we can disregard the limitation and constraints of vision while creating and present our true and free dispositions. In the third chapter, take the worldwide well-known artists and their works for example, they express their emotions frankly by creating unrestrained art works with simplification or exaggeration. Lots of symbols are applied to enrich the fantasy of their works. Later in the fourth chapter, I would explain my own creations and the experience of viewing and feeling the world with various mental states. I try to pay little emphasis on symbols and shapes of objects and simply present the innocent and pure intention, letting the creations show my consciousness directly. The fifth chapter will be the conclusion. In this part, the writer will show how to start from one "self" and apply the pathos from "heart" into creations. Create art works with different perspective and without constraints; let the aesthetic value of simplification extend infinitely.
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Wright, Alvin Owen. "Trouble on the horizon preservation strategy vs. over development in rural Wiregrass Georgia /." 2006. http://purl.galileo.usg.edu/uga%5Fetd/wright%5Falvin%5Fo%5F200605%5Fmhp.
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Greco, James L. "Controls and occurence of interflow over a restrictive argillic horizon in a low gradient hillslope." 2008. http://purl.galileo.usg.edu/uga%5Fetd/greco%5Fjames%5Fl%5F200805%5Fms.
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"Timing and capacity decision on the investment of the real estate project over the finite time horizon." 2008. http://library.cuhk.edu.hk/record=b5893780.
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Chiu, Man Kin.Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.
Includes bibliographical references (leaves 83-88).
Abstracts in English and Chinese.
Abstract --- p.i
Acknowledgement --- p.iv
Chapter 1 --- Introduction --- p.1
Chapter 2 --- Literature Review --- p.11
Chapter 3 --- The Model --- p.28
Chapter 3.1 --- The Preliminaries --- p.28
Chapter 3.2 --- The problem setting --- p.31
Chapter 3.3 --- The optimal selling strategy and structural properties --- p.39
Chapter 3.3.1 --- The optimal selling strategy --- p.39
Chapter 3.4 --- The optimal investment decision-Making regarding capacity and investment time --- p.44
Chapter 3.4.1 --- The optimal decision on the construction capacity --- p.45
Chapter 3.4.2 --- The optimal decision on the starting time of the investment --- p.48
Chapter 4 --- Numerical analysis --- p.55
Chapter 4.1 --- The setting of the numerical example --- p.56
Chapter 4.2 --- The numerical results --- p.63
Chapter 4.2.1 --- The optimal capacity --- p.63
Chapter 4.2.2 --- The optimal starting time of the construction --- p.69
Chapter 4.2.3 --- The effect of the capacity constraint --- p.73
Chapter 4.2.4 --- The effect of the time constraint --- p.78
Chapter 5 --- Conclusion --- p.80
Bibliography --- p.83
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Tsai, Cheng-Tsang, and 蔡政蒼. "Optimal Lot-sizing for a Deteriorating Item with shortage and limited capacity of supplier over Finite Planning Horizon." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/11515473343632217688.
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碩士國立中央大學
工業管理研究所
92
The purpose of this study is to develop an optimal replenishment policy for deteriorating inventory in a single-level MRP system with shortage and capacity constraint of supplier. We will develop an optimal dynamic lot sizing method base on Wagner-Whitin Approach. We will develop an optimal dynamic lot sizing method of discrete demand in chapter 3 and continuous demand in chapter 4 respectively. From our numerical analysis it is demonstrated that buyer’s total cost and replenishment policy are influenced by capacity constraint of supplier.
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Liu, Hung-Tai, and 劉宏泰. "Optimal Resource Allocation for Tuberculosis Epidemiology Control over Short Time Horizons." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/95252299962435292279.
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碩士國立清華大學
工業工程與工程管理學系
95
Tuberculosis is a chronic infectious disease which endangers the human health for a long time. It is a common disease existing in the whole world at present time, especially in the undeveloped and developing country. If properly cared, the tuberculosis patient can almost be cured. Otherwise, if not taking effective cure method, half of the tuberculosis patient will die in three years. And now the tuberculosis is developed into the mortal case – the drug resistance TB and the prevailing of the TB and AIDS which is a great calamity. The danger of the infectious disease in one country is the important index of testing system of national hygiene. How can we minimize the number of the infectious patients under the limited budget is what we are concerned. In this thesis, first we add the common case - infection of drug resistance compartment in our epidemic model, and we also consider the transmission rate of transferring from chronic patients to drug resistance case. We provide some preventing method usually used to control tuberculosis, like DOTS and reducing the contact rate…, and so on. Second, we consider different TB situations in different regions. In any one of the regions , when we collect the data and know the distribution of TB patients in each compartment, we can find out the best resource allocation method to control the disease, Finally, we present one example to illustrate the steps how we get the optimal solution by approximating method.
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Ramalingegowda, Santhosh M. "Do institutional investors who hold large stakes over long horizons have private information about future performance?" 2006. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-1378/index.html.
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Moore, Ann Marie Potter Joseph E. "Female control over first sexual intercourse in Brazil case studies of Belo Horizonte, Minas Gerais and Recife, Pernambuco /." 2004. http://repositories.lib.utexas.edu/bitstream/handle/2152/2105/mooream042.pdf.
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Moore, Ann Marie. "Female control over first sexual intercourse in Brazil: case studies of Belo Horizonte, Minas Gerais and Recife, Pernambuco." Thesis, 2004. http://hdl.handle.net/2152/2105.
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