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Articles 1 - 7 of 7
Full-Text Articles in Engineering
Rfid Modeling, Characterization, And Optimization, Joseph A. Cudrnak
Rfid Modeling, Characterization, And Optimization, Joseph A. Cudrnak
Electrical Engineering
Passive RFID tags may be used to transmit a message to a reader. This technology is useful for many applications, including inventory systems. However, due to electromagnetic cancellation on conductive surfaces, the reader cannot detect RFID tags placed directly on conductive objects. Using tag characterization in an RF anechoic chamber and modeling in HFSS, three types of Omni ID tags were characterized and a design was proposed to maximize signal power delivered to the reader.
Enabling Rfid Technology In Irish Hospitals, Khaled Ismail, Amr Arisha
Enabling Rfid Technology In Irish Hospitals, Khaled Ismail, Amr Arisha
Conference papers
Hospitals represent a significant part of healthcare systems and account for no less than 60% of the entire healthcare service in most of developed countries. Therefore, improving service in hospitals is an important element to the process of healthcare reform. Better use of resources, more consistent quality, and a higher service level are the keys to rationalise the huge expenditure in healthcare systems due to higher growth in demand. Even though massive spending has been directed towards hospital improvement in Ireland, services provided in Irish hospitals are ranked relatively low comparing to the other European countries. Growth of population, aging, …
Rfid Tag Readability Issues With Palletized Loads Of Consumer Goods, Jay Singh, Eric Olsen, Keith Vorst, K. Tripp
Rfid Tag Readability Issues With Palletized Loads Of Consumer Goods, Jay Singh, Eric Olsen, Keith Vorst, K. Tripp
Industrial Technology and Packaging
Radio Frequency Identification (RFID) is an automatic identification technology, relying on storing and remotely retrieving data using devices called RFID tags. This technology is being used in enterprise supply chain management-related applications to improve the efficiency of inventory tracking and management. However, this technology has not been able to realize its promised potential because of several factors, such as lack of congruous worldwide standards, privacy issues and less than perfect read rates in supply chain applications. This research aimed to evaluate the readability issues commonly faced by tagged cases of palletized consumer products. The variables studied in this research were …
Implementation Of Collaborative Rf Localization Using A Software-Defined Radio Network, Augustine A. Honore
Implementation Of Collaborative Rf Localization Using A Software-Defined Radio Network, Augustine A. Honore
Theses and Dissertations
This thesis investigates the use of collaboration between sensor nodes that were tasked with localizing a radio frequency emitter. Localization is a necessary component for dynamic spectrum access. Using a set of software-defined radios as our sensors and a received signal strength-based maximum likelihood localization algorithm, we successfully localized transmitting nodes based on their received signal strength. Our experiment was conducted outdoors using a flexible topology that could be shaped into 21 sub-topologies that varied in size, and orientation with respect to the transmitters. This was made possible through application of a time shift concept and a post-processing technique. We …
Chipless Rfid Sensor Tag System With Microstrip Transmissionline Based Id Generation Schemes, Sudhir Shrestha
Chipless Rfid Sensor Tag System With Microstrip Transmissionline Based Id Generation Schemes, Sudhir Shrestha
Doctoral Dissertations
This dissertation presents a chipless radio frequency identification (RFID) sensor tag system consisting of passive chipless RFID sensor tags and specialized reader. The chipless sensor tags are fabricated on a flexible substrate and contain an ID generation circuit, a sensor, and a microstrip antenna. The ID generation circuit consists of meandered microstrip transmission lines and uses a novel reflection and delay based ID generation scheme. The scheme, using an input RF pulse, constructs an on-off keying (OOK) or pulse position modulated (PPM) signal pattern representing a unique ID code. Two transmission lines and OOK representation are used and the generation …
Rfid Tags / Planar Inductors As Chemical Sensor Platforms In Liquid Sensing Applications, Gregory Donald Schumacher-Novak
Rfid Tags / Planar Inductors As Chemical Sensor Platforms In Liquid Sensing Applications, Gregory Donald Schumacher-Novak
Master's Theses (2009 -)
In this work, RFID tags are investigated as a liquid-phase chemical sensing platform. A dual-layer of selective coating film with polyaniline (PANi) on top of poly(epichlorohydrin) (PECH) is used for the detection of trace amounts of organic compounds (toluene and ethylbenzene) in aqueous solutions. Various experiments were performed to evaluate the coated RFID tag sensors. Shifts in the impedance and resonant frequency due to analyte sorption are measured. Details of the responses of the dual-layer film to different pH baseline solutions are shown. The results show that this dual-layer film can be used to detect toluene and ethylbenzene with high …
Genetic Stigmergy: Framework And Applications, Joshua A. Brandoff
Genetic Stigmergy: Framework And Applications, Joshua A. Brandoff
Graduate Dissertations and Theses
Stigmergy has long been studied and recognized as an effective system for self-organization among social insects. Through the use of chemical agents known as pheromones, insect colonies are capable of complex collective behavior often beyond the scope of an individual agent. In an effort to develop human-made systems with the same robustness, scientists have created artificial analogues of pheromone-based stigmergy, but these systems often suffer from scalability and complexity issues due to the problems associated with mimicking the physics of pheromone diffusion. In this thesis, an alternative stigmergic framework called 'Genetic Stigmergy' is introduced. Using this framework, agents can indirectly …