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 20 for “"powerline"”.
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Powerline perching with a fixed-wing UAV
… a new solution to this problem - landing on a powerline to recharge. Furthermore, because a current carrying conductor generates a magnetic field, a unique opportunity exists to use the powerline not just for recharging, but for localization as well. In this thesis, we seek to develop …
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Assessing the variations in alien plant communities within powerline corridors: A case study of Fundudzi and Khakhu Powerline Corridors
Human activities such as the use of powerline servitude corridors for the secure transmission and distribution of electricity alter natural landscapes and change vegetation patterns, and may also encourage the spread of alien plants. The spread of alien plants from one area to another through …
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Design and Analysis of OFDM System for Powerline Based Communication
… of this research is to design an OFDM modem for powerline-based communication in order to propose and examine a novel approach in comparing the different modulation order, different modulation type, application of Forward Error Correction (FEC) scheme and also application of different noise types …
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High Speed Turbo Tcm Ofdm For Uwb And Powerline System
… OFDM system over UWB channel and HomePlug powerline channel by using our Turbo TCM with QAM constellation for higher data rate transmission. The study shows that the system can offer much higher spectral efficiency, for example, 1.2 Gbps for OFDM/UWB which is 2.5 times higher than the …
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Intelligent Monitoring of Powerline Vibrations - Sparse Sensing and Predictive Modeling Approach
Wind-induced vibrations (WIV), particularly Aeolian vibrations, pose a persistent threat to the structural integrity and operational lifespan of overhead power transmission lines. Traditional mitigation strategies, such as passive dampers, often lack adaptability to changing environmental …
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An ideological analysis of filter blogs : how Daily Kos and Powerline construct biased news
<p>This thesis analyzes how the news blogs Daily Kos and Power line construct news presented from an ideological viewpoint. Specifically the types of evidence used by the blogs to assert their viewpoints and their intended audiences were analyzed. This thesis utilized theory from Jean Francois …
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DC powerline communication system using a transmission line transformer for high degree of freedom applications
A new type of powerline communication is developed to reduce cable requirements for robotic, electromechanical, and vehicular systems. A DC power bus line connecting a DC power supply to motor drives and sensor units is used for transmitting both data and DC power. Unlike conventional AC powerline …
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The red imported fire ant, Solenopsis invicta, in early-successional coastal plain forests: tests of distribution and interaction strength
… fire ants colonize early-successional road and powerline cuts through forests, and I tested whether some of these linear habitats provided better fire ant habitat than others. I found that fire ant mound density (#/ha) was similar in narrow dirt roads and in wider roads with the same …
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Long polyphase sequences for adaptive mmse detector in asynchronous cdma plc network with impulsive noise
… enlace de comunicacion son un requisito. La red powerline es un medio de transmision compartido usado por todos los nodos de forma independiente. Por lo tanto, se deben emplear tecnicas de acceso multiple para dividir las senales de transmision, las cuales deben ser ortogonales entre si. Ademas …
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A Wide Input Power Line Energy Harvesting Circuit For Wireless Sensor Nodes
… RF sources. Among these ambient resources, AC powerlines are a stable energy source in an urban environment. Many researchers investigated methods to exploit this stable source of energy to power wireless IoT devices. The proposed circuit aims to harvest energy from AC powerlines with a wide …
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Modeling Human Movement in the Wilderness: Navigating Lost Person Behavior and Searcher Response
… terrain-specific features (e.g., roads, streams, powerline easements), and is validated against real incident data. Because navigation is so heavily-dependent on the landscape, we further extend the model to include more landscape-dependent behaviors (like following elevation contours), explicit …
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Exotic Invasive Plants on Private Woodlands of Virginia: Effects on forest composition, structure, and wildlife habitat
… including access roads, trails, harvest sites, powerline corridors, and fence rows, is common on private land. Private landowners are often left to combat these problems without many monetary or expertise resources that are available to federal lands. Three field sites, each in a different …
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Graphical models and message passing receivers for interference limited communication systems
… then extends these models for wireless and powerline interference to include temporal dependence among amplitude samples. The extensions are validated with measured data. The rest of this dissertation utilizes the proposed models to design receivers in interference limited environments. …
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Increasing Signal to Noise Ratio and Minimising Artefacts in Biomedical Instrumentation Systems
… sources of artefacts, including the 40kHz powerline interference (PLI), 50/60kHz common-mode noise, white noise, and motion artefacts. The system was fully developed and tested and was firstly simulated using MATLAB Simulink tools to prove the effectiveness of the system before starting the …
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Integrative and Multi-scale Deep Learning for 3D Point Cloud Transmission Corridor Scene Segmentation: Noise Filtering, Attention-Fused Feature Integration, and Panoptic Network
… for pylons, 99% for ground, vegetation, and powerlines, and demonstrating high precision in 3D object detection. Experiments conducted on Teledyne Optech's Galaxy T1000 dataset, which features diverse voltage transmission lines, validate the effectiveness of Pan-SUNet, particularly when …
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Robust post-stall perching with a fixed-wing UAV
… UAV using the magnetic field generated by a powerline. I demonstrate on hardware that the aircraft is still capable of successfully executing a closed-loop perching maneuver indoors using the lower fidelity state estimates. I then move the entire experiment outdoors and begin testing the …
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An evaluation of the utility of four in-situ test methods for transmission line foundation design
A major powerline is typically supported by many widely spaced structures. Each structure is, in turn, supported by a foundation or foundations. The prevailing philosophy behind transmission structure design to date has been based on the notion that information for geotechnical conditions is sparse …
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Novel ECG analysis with application to atrial fibrillation detection
… considered that includes baseline wander (BW), powerline interference (PLI), electromyogram (EMG) and motion artifact (MA). For BW and MA noise reduction, a novel Sqtwolog Threshold and High/Low pass (STHL) wavelet based filter is used. An Improved Proportionate Normalised Least Mean Square …
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Modelling, estimation and control of a twin-helicopter slung load transportation system
… The installation of wind-turbine blades, powerline towers and radio masts in remote locations, are examples of where the application of this technology may be useful. The investigation of this thesis is around modelling, estimation and control of the twinhelicopter slung load …
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Systém řízení světelných zdrojů po silových rozvodech
Práce se zabývá návrhem a realizací inteligentního systému domovního osvětlení. V obytných částech domu je intenzita osvětlení udržována na konstantní úrovni, kterou si nastavuje uživatel. Intenzitu osvětlení lze manuálně nastavit pro jednotlivé místnosti z centrálního modulu s uživatelským …