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关键词： Circular supply chain management   Blockchain technology   RFID   B2B tea industry  

摘要： Circular supply chain management (CSCM) is required for the tea industry to transition from a linear economic model to a more productive circular economic model. However, tracking reusable and recyclable materials over the life cycle of the tea supply chain involves multiple stakeholders. Radio frequency identification (RFID) technology driven by blockchain technology (BCT) can help to manage the complexities of circular tea supply chain management (CTSCM), establishing transparency and traceability in the industry. This study takes the first step in developing a distributed and service-oriented system architecture that embraces an RFID-integrated BCT-enabled circular supply chain practice model for a business-to-business (B2B) tea industry network. The study provides a deeper understanding of inventory performance, resource use, and the industry's processes. Furthermore, the results will aid enterprises in the B2B tea industry to better understand the factors influencing supply chain performance. Managerial and social implications of implementing RFID-integrated blockchain-driven technologies in service of the circular economy agenda are discussed.

关键词： Image recognition  

摘要： Aim: To improve the smart cart application for better user flexibility. Background: Users are able to easily purchase products using a smart cart. We have designed a strategy for these smart carts such that a person does not have to stand in a queue for their bill. The stock update is automatically recorded in the server. Objective: The objective of this work is to find an alternate solution for shopping that is timesaving. Methods: We have used the radio-frequency identification mechanism for data transmission and have used a server for storing the information of stocks. Results: The system is observed to exhibit efficient performance. Conclusion: We have proven that it is possible to reduce the billing time by using our smart cart application and that product identification via image processing is also possible. © 2022 Bentham Science Publishers.

关键词： Chipless RFID   Spectrum signature identification   Multiresonator tag   Cross-polarized antennas  

摘要： This paper introduces a chipless Radio Frequency Identification tag to be used for oil and gas pipelines monitoring applications. The proposed tag uses multiple E-shaped resonators to introduce multiple notches in the operation band, giving any required number of bits in the spectrum signature. Two cross-polarized semi-circular patches with partial grounds are used as the tag antennas. The proof of the concept is done using vector network analyzer measurements with two implemented Vivaldi antennas as transmitter (Tx) and receiver (Rx). The experimental data match will with the expected results.

关键词： RFID sensor   RFID yarn   temperature sensor  

摘要： This paper presents the design of an ultra high-frequency (UHF) radio frequency identification (RFID) sensor tag integrated into a textile yarn and manufactured using the E-Thread(R) technology. The temperature detection concept is based on the modification of the impedance matching between RFID tag's antenna and the chip. This modification is created by the change in the resistance of a thermistor integrated within the tag system due to a temperature variation. Moreover, in order to obtain an environment independent detection, a differential approach is proposed that avoids the use of a pre-calibration phase by the use of a reference tag. Experimental characterization demonstrates the RFID sensor's potential of detecting a temperature variation or a temperature threshold between 25 and 70 & DEG;C through the variation of the transmitted differential activation power.

关键词： big data analytics   internet of things   IoT   logistic regression   machine learning   RFID  

摘要： The importance of big data analytics has become apparent with the increasing volume of data on the Internet. The amount of data will increase even more with the widespread use of Internet of Things (IoT). One of the most important application areas of the IoT is healthcare. This study introduces new real-time data analytics architecture for an IoT-based smart healthcare system, which consists of a wireless sensor network and a radio-frequency identification technology in a vertical domain. The proposed platform also includes high-performance data analytics tools, such as Kafka, Spark, MongoDB, and NodeJS, in a horizontal domain. To investigate the performance of the system developed, a diagnosis of Wolff-Parkinson-White syndrome by logistic regression is discussed. The results show that the proposed IoT data analytics system can successfully process health data in real-time with an accuracy rate of 95% and it can handle large volumes of data. The developed system also communicates with a riverbed modeler using Transmission Control Protocol (TCP) to model any IoT-enabling technology. Therefore, the proposed architecture can be used as a time-saving experimental environment for any IoT-based system.

关键词： Antennas   UHF antennas   Antenna measurements   Impedance   Electronic countermeasures   Radiofrequency identification   Receiving antennas   Circular polarization (CP)   high gain   metal-attachable   tag antenna  

摘要： In this letter,a circularly-polarized (CP) metal-tolerant tag antenna with a long reading distance (RD) is proposed for the ultra-high frequency (UHF) radio-frequency identification (RFID) systems. In order to realize CP radiation and high gain, a cross slot is etched on top patch to provide two orthogonal polarizations, whereas the meandered strip on the central copper layer is used to obtain a 90 degrees phase difference between adjacent ports. An equivalent circuit model is established to better understand the operating mechanism and impedance characteristic. A prototype mounted on a 200 mm x 200 mm metal plate has been manufactured and measured to verify the design and shows an impedance bandwidth of 8 MHz (918-926 MHz) and axial ratio bandwidth of 1.3 MHz (921.6-922.9 MHz). Also, a maximum gain of 2 dBi at 922 MHz and a maximum RD of about 22.4 m have been demonstrated.

关键词： RFID   ICSFs   DEMATEL   cluster analysis  

摘要： The purpose of this study is to explore the critical success factor of radio frequency identification (RFID) implementation and to establish a relationship between critical success factor of RFID and organizational strategies. This article uses DEMATEL (Decision Making Trial and Evaluation Laboratory) and cluster analysis technique to identify the complex relationship between RFID implementation critical success factors (ICSFs) and organizational strategies. The result indicates that extrinsic critical success factors such as privacy and security, potential legislation and cost-effective reusable tags are the three most important RFID ICSFs that are essential for all the organization's strategy types, whereas the order of priority of other ICSFs depends on organizational strategy types. Implementation of RFID enhances utilization of resources and information. It gives a competitive advantage to businesses. The study significantly contributes to the body of knowledge as applied to theory and practice in RFID implementation.

关键词： RFID   Ticket-switching   Retailing   Supply chain  

摘要： Ticket-switching is the process by which the price information on a relatively expensive item is switched with one from a cheap item. This allows the customer to pay the cheap item price for the expensive item. Evidence suggests that ticket-switching events in retail supply chains may not be rare and therefore need to be addressed. We consider ticket-switching in RFID-based systems and develop four increasingly complex models to address ticket-switching events. These models use readily available information such as that from related database record, tag memory information, and interdependency among tagged items. We illustrate the relative performance of these models through simulation across seven different scenarios. The various models utilize different input information and are appropriate for different considered scenarios. Our results indicate that ticket-switching can be effectively controlled through these model implementations.

关键词： Chipless RFID tag   Square loop resonator   Flower Shaped Monopole Antenna  

摘要： This paper presents a 12-bit retransmission-based chipless Radio Frequency Identification (RFID) in the frequency range of 1.3-2.8 GHz. The designed tag is fully planar and is realized on a low-cost FR-4 substrate with a relative permittivity of 4.4 (loss tangent of 0.0018), and thickness of 1.6 mm. The overall footprint of the tag is 20 x 24 x 1.6 mm3, and it contains two high flat gain orthogonal antennas for transmitting and receiving a longread range of data. The structure consists of a modified transmission line to form a square loop, strips of different lengths arranged in a readable configuration, and strips to enable tunable frequency operation. The flowershaped antennas use a partial ground with a modified circular disc-shaped patch to attain desirable bandwidth and maximum flat gain. The frequency coding technique increases the coding density using three resonators, with 10 combinations providing 1000 (103) identification codes. The measured results of the designed data-encoding circuit correlate with the simulated results, ensuring the reliability of real-time low-profile applications.

关键词： RFID technology   UHF RFID transponder   RFID sensor   active glazing unit   PV micro-power plant   PV glazing set  

摘要： The paper focuses on the synthesis of semi-passive RFID transponders-sensors that are intended to integrate with active glazing units with built-in photovoltaic cells. The main purpose of the designed construction of the UHF RFID device is to provide diagnostic information in the monitoring system of a photovoltaic micro-power plant. Furthermore, the RFID sensor is aimed at being implemented at various stages of the product life cycle: production, distribution, storage, installation, common operation, service/maintenance and disposal. In the presented research work, particular attention is paid to several aspects of the RFID sensor synthesis: use of the energy, generated periodically in the PV cells, to power the monitoring device that has to act permanently;specification of the PV module parameters that have to be monitored in the diagnostic process;implementation of data acquisition and energy management models in an electrical circuit;wireless data transfer to the master unit (monitoring host), even in the absence of power supply (e.g., module damage, blackout), using a standardized communication protocol IEC 18000-63 used in the RFID technology;and the design of the antenna system taking into consideration limitations of electronic technology and the material properties of substrates and glasses used in PV modules and RFID sensors. Based on the results of the investigations, the modular structure of the RFID sensor demonstrator is proposed. Moreover, several diagnostic scenarios are analyzed in detail. On the basis of the provided considerations, it is shown that in order to find a malfunctioning component, it is enough to compare the voltages on the photovoltaic modules that are in the close vicinity.