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 18 of 18 for “"Low Cost Sensor"”.
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Spatial optimization of an existing, low-cost sensor network for air pollution in London
Air pollution sensors are rapidly decreasing in cost and can provide measurements with higher spatial and temporal resolution. In this paper we combine two different Gaussian process methods to optimize spatially an existing low-cost sensor network for air pollution in London. We demonstrate the …
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Development of novel methodologies for utilising low-cost sensors for ambient Particulate Matter measurement
… Recent studies have shown that although low-cost PM monitors, such as Optical Particles Counters (OPCs), can be utilised for both personal exposure and high-density sensor network applications, these sensors can be subject to several limitations such as relative humidity (RH) …
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New Opportunities in Crowd-Sourced Monitoring and Non-government Data Mining for Developing Urban Air Quality Models in the US
… particularly with the help of rapidly developed low-cost sampling technologies. The shift from relying only on government-based regulatory monitoring to crowd-sourced effort has provided new opportunities for air quality data. In addition, the fast-growing data sciences (e.g., data mining) allow …
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Problems and solutions for handling attacks in sensor networks
"A sensor network consists of thousands of low-power, low-cost sensor nodes with limited computation, communication, and sensing capabilities. Many sensor network applications are security sensitive. Traditional security protocols are designed for resource rich machines to support large computation …
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MULTI-CHANNEL CDMA-LIKE CAPACITIVE SENSOR INTERFACE CIRCUITS
… is governed by three components, i.e. advanced sensors, low-power and low-cost sensor interface circuits and efficient wireless connections. This thesis introduces a CDMA-like period modulation multi-capacitive-sensor interface circuit, which targets at the IoT applications. The proposed …
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An exercise in selecting low-cost air quality sensor placements within an urban environment
… of major cities all over the world. The high cost of current monitoring programs means that enforcement of current regulation, such as the United States Environmental Protection Agency's ambient air quality standards, can be lacking at the individual level. Because of their low cost, sensor …
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A self-powered single-chip wireless sensor platform
"Internet of things” require a large array of low-cost sensor nodes, wireless connectivity, low power operation and system intelligence. On the other hand, wireless biomedical implants demand additional specifications including small form factor, a choice of wireless operating frequencies within …
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An Electrochemical Sensor Development Platform: Applications of System Identification to Biological Sensing in Evolving Fluids
… healthcare, and pharmaceuticals. Compact, low-cost electrochemical sensors that monitor microorganism population and growth have attracted attention as replacements for days-long plate-counting -- potentially delivering results within hours or seconds by monitoring model parameters from …
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An energy-efficient P2P protocol for validating measurements in wireless sensor networks
Wireless sensor networks (WSNs) should collect accurate measurements to reliably capture the state of the environment that they monitor. However, measurement data collected from one or more sensors may drift or become erroneous due to hardware failures or sensor degradation. In WSNs with remote …
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Localizatation estimation usign the technique of multi-sequence positioning
Wireless sensor networks (WSN) have been considered as promising tools for many location dependent applications such as area surveillance, search and rescue, mobile tracking and navigation, etc. In addition, the geographic information of sensor nodes can be critical for improving network …
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Characterisation of cross-linking and moisture ingress detection in an epoxy/amine resin using fibre-optic sensors
… The feasibility of using optical fibre-based sensor systems for monitoring cross-linking reaction has been demonstrated previously. However, little work has been reported on the deployment of a single sensor to study the cross-linking kinetics and the diffusion of moisture. In the current …
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Low cost monitoring system to diagnose problematic rail bed : case study of Mud Pumping Site
This thesis describes the development of low cost sensors and wireless sensor network (WSN) platform aimed at characterizing problematic rail beds (subgrade). The instrumentations are installed at a busy high-speed Northeast Corridor (NEC) railway site that is experiencing recurring mud pumping …
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Mechanisms Of Head Injuries In Road Traffic Accidents; A Potential Solution For Data Collection
… the exact injuries sustained. A working in-ear sensor system was deemed to offer a potential solution in obtaining elusive data regarding the kind of impact events that could cause head injuries for road users. An in-ear accelerometer system used by the FIA Institute was evaluated through …
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Modeling and Scheduling for Sensor Network Quality-of-Experience Enhancement
The rapid advancement in low-cost sensor node design has led to the possibility of utilizing them in various monitoring applications such as environment monitoring (including inaccessible terrain), structural health monitoring and healthcare. Many of these safety-critical applications however, …
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Alternative Mission Concepts for the Exploration of Outer Planets Using Small Satellite Swarms
… single, expensive spacecraft missions. Mission costs are particularly high on missions to the outer planets and while invaluable, finite budgets limit our ability to perform extensive and frequent investigations of the planets. Planetary systems such as Jupiter and Saturn provide extremely …
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Positioning In Indoor Environments Based on INS and RF Sensor Fusion
… system which can provide portability, minimum cost and sufficient accuracy. Two of low cost sensor technologies have been utilised in this research; Inertial Navigation Systems (INS) and a positioning system based on the Bluetooth technology. The development of final system has been targeted by …
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Sustainable urban drainage and IoT monitoring for urban flood mitigation in a changing climate [Sistemi di drenaggio urbano sostenibile e IoT per la mitigazione delle inondazioni urbane in un contesto di cambiamento climatico]
… di tesi si concentra sullo sviluppo di un nuovo sensore basato sull’ Internet of Things e a basso costo per il rilevamento di inondazioni in contesto urbano. Preliminarmente allo sviluppo del sensore, gli obiettivi principali e i requisiti funzionali del sensore vengono definiti, insieme alle …
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Defect characterization in concrete elements using vibration analysis and imaging
… (IE) test, which utilizes contact type sensors, is an efficient NDE method that is used to identify and characterize internal defects in concrete structures. However large testing volumes associated with the infrastructure demand many tests, which can be labor-intensive and …