Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 90 for “"GEOLOCATION"”.
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Neural geolocation prediction in Twitter
… application of neural models to the problem of geolocation prediction and experiment with multiple techniques to analyze neural networks for geolocation inference based solely on text. Experimental results on the dataset suggest that choosing appropriate network architecture can all increase …
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Two-Sensor Synthetic Aperture Geolocation Techniques
Geolocation technology with the ability to locate an unknown beacon signal in three-dimensional space has been engrafted into numerous modern electronic systems. Indeed, the marketplace is anxious for more accurate and more accessible geolocation data. A primary limiting factor of the growth of …
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Using Statistical Methods to Determine Geolocation Via Twitter
<p>With the ever expanding usage of social media websites such as Twitter, it is possible to use statistical inquires to form a geographic location of a person using solely the content of their tweets. According to a study done in 2010, Zhiyuan Cheng, was able to detect a location of a Twitter user …
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Impact of MIMO Transmission on CAF-Based Geolocation
… Function (CAF) is often used for passive geolocation of an emitter based on the time difference of arrival (TDOA) and frequency difference of arrival (FDOA) of the received signals. CAF performance has been thoroughly investigated in regards to traditional single-input single-output (SISO) …
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Statistical Analysis of Geolocation Fundamentals Using Stochastic Geometry
The past two decades have seen a surge in the number of applications requiring precise positioning data. Modern cellular networks offer many services based on the user's location, such as emergency services (e.g., E911), and emerging wireless sensor networks are being used in applications spanning …
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Advancements in Isotopic Geolocation Tools for Insect Migration Research
… and short lifespans of insects. Isotope geolocation has shown promise for overcoming these obstacles. Here, I develop and apply metals and metal isotopes, specifically strontium isotope ratios (⁸⁷Sr/⁸⁶Sr), to increase the spatial precision of isotope geolocation and demonstrate how …
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Simultaneous Three-Dimensional Mapping and Geolocation of Road Surface
… paper presents a simultaneous 3D mapping and geolocation of road surface technique that combines local road surface mapping and global camera localization. The local road surface is generated by structure from motion (SFM) with multiple views and optimized by Bundle Adjustment (BA). A system …
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Supporting Open Source Investigative Journalism with Crowdsourced Image Geolocation
… By enabling crowd workers to participate in the geolocation process, we can provide investigative journalists with efficient and complete verification of image locations. Parallelizing searching speeds up the verification process as well as provides a more extensive search, all while allowing the …
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TOWARD UNDERSTANDING THE LONGITUDINAL STABILITY OF AN IP GEOLOCATION DATABASE
While many IP Geolocation Database (IPGD) studies exist gauging "accuracy" by comparing to ground truth (and other IPGDs), there is a dearth of studies looking at the stability of IPGD locations in longitudinal context. Here, we build a framework for such a study and apply it to MaxMind's …
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Geolocation of Utility Assets Using Omnidirectional Ground-Based Photographic Imagery
A process for using ground-based photographic imagery to detect and locate power distribution assets is presented. The primary feature of the system presented here is it's very low cost compared to more traditional inspection methods because the process takes place entirely in virtual space. …
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Advancing security information and event management frameworks in managed enterprises using geolocation
… that privacy-enforcing procedures on geolocation data in SIEMs and meta- systems alike are necessary and enforceable. The method for the study was to augment a SIEM, established for the collection of events in an enterprise service management environment, with geo-location data. …
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Information cards and a design to extend the claim model to incorporate geolocation
The rapid adoption of the internet has occurred despite the lack of a ubiquitous identity meta-system. The status quo is a patchwork of proprietary security systems. A number of security issues have arisen as a result which threaten to lead to a loss of trust in the internet, and may limit the …
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Differences in online course usage and IP geolocation bias by local economic profile
… Using ZIP Codes identified by the MaxMind IP geolocation database, I find that per-capita registration rates correlate with economic prosperity and population density. Comparing these ZIP Codes with user-provided mailing addresses, I find evidence of bias in MaxMind geolocation: it makes …
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Testing the Forensic Predictive Geolocation Significance of Human-made Particulates in Urban Surface Soils
Forensic geolocation is of increasing interest to the soil forensics and geoscience community. Not much is known about the forensic geolocation significance of anthropogenic materials in soils. As a result, the goal of this study was to investigate the potential forensic predictive geolocation …
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Aladdin's Magic Lamp: Developing Methods for Calibration and Geolocation Accuracy Assessment of the DMSP OLS
… applications a repeatable method for assessing geolocation accuracy, performing inter-calibration, and defining the minimum detectable brightness would be beneficial. An array of portable lights was designed and taken to multiple field sites known to have no other light sources. The lights were …
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Precise Geolocation for Drones, Metaverse Users, and Beyond: Exploring Ranging Techniques Spanning 40 KHz to 400 GHz
This dissertation explores the realm of high-accuracy localization through the utilization of ranging-based techniques, encompassing a spectrum of signals ranging from low-frequency ultrasound acoustic signals to more intricate high-frequency signals like Wireless Fidelity (Wi-Fi) IEEE 802.11az, 5G …
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Design and Implementation of a Distributed Tdoa-Based Geolocation System Using Ossie and Low-Cost Usrp Boards
… are presented showing the capabilities of the geolocation system.
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