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关键词： Smart packaging   RFID technology   RFID sensor   Food safety monitoring   Food quality control  

摘要： The global pandemic COVID-19 has led to an increase in the number of people purchasing food online, which has brought to a higher demand on the food supply chain. Such as the need to collect more information related to food safety and quality in real-time. Strengthening management of food logistics information flow can reduce food loss and waste and bring better quality and safety of food to consumers. In this review, the importance and applicability of RFID (Radio Frequency Identification) technology to smart food packaging are described. This study emphasizes the recent advancement of the RFID tags in humidity, temperature, gas, pH, integrity, and traceability sensor applications in connection with food packaging. RFID sensors are more suitable for smart packaging both in terms of sensing ability and data transmission. A simpler, low-cost, more robust and less power -demanding sensors network is the development direction of smart packaging in the future. Chipless RFID sensors have the potential to achieve these functions. But it still faces many challenges to be overcome. For example, biocompatible, cost, reading range, multi-tag collision, multi-parameter sensors, recycling issues, security and privacy of RFID system should be solved.

关键词： RFID   Sustainable fashion   Fashion supply chain   Environmental sustainability   Social and economic benefits   Vietnam  

摘要： The growing need for sustainability in fashion production and retail operations has prompted the adoption of a variety of strategies, including the use of technology. Radio Frequency Identification (RFID) technology may shift economic dynamics and provide a more sustainable future in numerous industries, including fashion. Vietnam is one of the main fashion and textile manufacturing nations in South East Asia, where the manufacturing sectors face a number of obstacles in order to reach the triple bottom line of sustainability. As a result, using empirical research, this paper aimed to analyse the long-term advantages of RFID technology implementation. The research findings revealed that the adoption of RFID technology in Vietnamese fashion enterprises is in its infancy stage. Among a number of factors, cost of deploying RFID technology is found to be a critical barrier. Furthermore, companies that have used RFID have demonstrated that the speed, precision, and on-time information avail-ability provided by RFID assists in reaching a variety of environmental, social, and economic advantages. Although this study discovered certain disadvantages of deploying RFID technology, the benefits obtained by RFID technology outweigh the disadvantages. The findings suggest that fashion industry should migrate to RFID due to the benefits of sustainability and transparency in the supply chain.

关键词： tangible user interfaces   TUI   RFID   user modeling   bayesian inference  

摘要： Recent advancements in object-tracking technologies can turn mundane constructive assemblies into Tangible User Interfaces (TUI) media. Users rely on instructions or their own creativity to build both permanent and temporary structures out of such objects. However, most existing object-tracking technologies focus on tracking structures as monoliths, making it impossible to infer and track the user's assembly process and the resulting structures. Technologies that can track the assembly process often rely on specially fabricated assemblies, limiting the types of objects and structures they can track. Here, we present StructureSense, a tracking system based on passive UHF-RFID sensing that infers constructive assembly structures from object motion. We illustrated StructureSense in two use cases (as guided instructions and authoring tool) on two different constructive sets (wooden lamp and Jumbo Blocks), and evaluated system performance and usability. Our results showed the feasibility of using StructureSense to track mundane constructive assembly structures.

关键词： AHP method   decision-making   FAHP method   logistics   RFID solutions   Supply Chain  

摘要： There has been a recent years tendency for replacing traditional supply chain data identifying and collecting systems with RFID (Radio Frequency Identification) technologies. There are different RFID solutions on the market and it is crucial to choose the solution that best suits the set of goals and desired scenarios. The choice of solution depends on a whole range of different factors and criteria. The present paper develops multi-criteria evaluation models based on the AHP (Analytic Hierarchy Process) and FAHP (Fuzzy Analytic Hierarchy Process) approach. There are no papers in the literature that solve the mentioned problem in this way, on a real example. Three RFID solutions are defined referring to different data identification levels in supply chains, namely: product level, level of packaging and the level of the pallet. Solutions are evaluated, and rated in relation to four criteria: investments, costs, participants' visibility and participants' privacy protection in supply chains. Developed models are tested and applied via a case study conducted in the Serbian market. The model is an excellent basis for decision-making in practice and for researchers in the literature, while with certain modifications, it can be used for other similar problems.

关键词： Received signal strength indicator (RSSI)   RSSI-based hybrid algorithm   Indoor navigation  

摘要： Knowing the precise and real-time location of underground mining workers is essential for their health and safety in any emergency. However, the standard Global Positioning System (GPS) is insufficient for such indoor environments as it requires new infrastructure based on different technologies and algorithms. Instead, Radio Frequency Identification (RFID)-based real-time indoor localization systems and a hybrid algorithm are developed. The received-signal-strength (RSS) based positioning techniques are investigated and applied in indoor environments. A unique hybrid approach based on fingerprinting is proposed and developed to solve the disadvantages of the existing techniques. Consequently, the accuracy of this one-of-a-kind algorithm is found to be 2.52 m in an office and 3.13 m in an underground mine. We also compared the proposed hybrid algorithm to the Weighted K-Nearest Neighbor (WKNN). WKNN, on the other hand, has an accuracy of 4.01 m in the office and 4.33 m in underground mining environments. (C) 2022 Elsevier B.V. All rights reserved.

关键词： RFID   Blockchain   Supply chain  

摘要： Blockchain-based supply chains provide a new solution to decentralized multi-party product management. However, existing methods, including ID-based and cryptographic-based solutions, cannot achieve both counterfeit resistance and decentralization in supply chain management. We argue that this dilemma comes from the disconnection and inconsistency of the data records and physical product entities. This paper proposes RF-Chain, a novel decentralized supply chain management solution that uniquely combines data record authentication and physical-layer RFID tag authentication to effectively achieve credibility and counterfeit resistance. The main contribution of this work is to integrate physical-layer authentication of cheap commodity RFID tags into a blockchain-based information management system, and RF-Chain is the first to do so. The proposed cross-layer authentication can effectively defend against counterfeit attacks without relying on a central key management service. Real-world experiments utilizing the Ethereum (ETH) platform and more than 100 RFID tags demonstrate that RF-Chain is secure, effective, time-efficient, and cost-efficient.

关键词： Array antenna   2 x 2 Butler matrix   hybrid coupler   RFID reader   switched beam-forming   multi-beam antenna  

摘要： This paper presents design and analysis of a beam switchable 1 x 2 array patch antenna fed by a 2 x 2 Butler matrix based hybrid coupler for 2.45 GHz radio frequency identification (RFID) reader applications in the ISM band. The proposed beam switchable array antenna arrangement consists of two identical patch elements, a pleated quarter-wavelength impedance transformer (PQWIT), and a hybrid coupler. The concept of PQWIT has been utilized to reduce the overall implementation area of the patch elements. The overall area of the patch element is miniaturized by 50% due to the implementation of PQWIT. This miniaturized antenna is used as a radiating element for designing a beam switchable 1 x 2 array antenna fed by a hybrid coupler. The proposed antenna prototype has been fabricated on a 1.56 mm thick Rogers RT/duroid 5880 substrate with a physical area of 112 x 100 mm(2). The simulation and measured results exhibit good agreements. The designed antenna offers a broad bandwidth of 844 MHz (1.956-2.80 GHz), peak gain of 8.86 dB, peak radiation efficiency of 99.52% and has two switchable beams in the directions -30 degrees and +30 degrees. The suggested switched beam array antenna is suitable for RFID reader applications at 2.45 GHz for tracking of moving objects.

关键词： Internet of things  

摘要： In the 21st century, sending babies or children to daycare centres has become more and more common among young guardians. The balance between full-time work and child care is increasingly challenging nowadays. In Malaysia, thousands of child abuse cases have been reported from babysitting centres every year, which indeed triggers the anxiety and stress of the guardians. Hence, this paper proposes to construct a remote baby surveillance system with radio-frequency identification (RFID) and global positioning system (GPS) tracking. With the incorporation of the internet of things (IoT), a sensor-based microcontroller is used to detect the conditions of the baby as well as the surrounding environment and then display the real-time data as well as notifications to alert the guardians via a mobile application. These conditions include the crying and waking of the baby, as well as temperature, the mattress’s wetness, and moving objects around the baby. In addition, RFID and GPS location tracking are implemented to ensure the safety of the baby, while white noise is used to increase the comfort of the baby. In the end, a prototype has been successfully developed for functionality and reliability testing. Several experiments have been conducted to measure the efficiency of the mattress’s wetness detection, the RFID transmission range, the frequency spectrum of white noise, and also the output power of the solar panel. The proposed system is expected to assist guardians in ensuring the safety and comfort of their babies remotely as well as prevent any occurrence of child abuse. © 2022, CC BY-NC-ND.

关键词： Internet of things  

摘要： As an essential branch of physical layer authentication research, radio frequency identification (RFID) has advantages in achieving lightweight and highly reliable authentication. However, in the Internet of Things (IoT) environment, where a large scale of devices are connected to the network, there is an issue that the difference of the RF fingerprints is less distinct among the same type of devices. To this end, in this paper, we propose an RFID scheme for IoT devices based on long-short term memory and convolutional neural network (LSTM-CNN). This scheme combines the excellent learning ability of LSTM and CNN to perceive the context information and extract the local feature of RF data. Specifically, RF data is first fed into LSTM to obtain long-term dependency features containing temporal information. Then, CNN is designed for secondary feature extraction to enlarge RF differences and further used for device classification. The experiment results on the open RF data set ORACLE indicate that the identification accuracy of the proposed scheme can reach over 99%. Compared with other schemes, the performance is improved by 6%-30%.

摘要： RFID wearable and implantable technology have recently attracted much interest in medical healthcare applications. On the other hand, Using the RFID tags with the proximity of a human body, create challenge whence Design, fabrication, testing, etc. with these factors in mind, this article presents a novel completely design of a chipless RFID tag for medical use with scientific characteristics that include comfortable shapes and dimensions which can be implanted inside any area of the human body, as well as the use of non-toxic materials that do not have adverse effects on body tissues in the Design of the proposed tag within ultra-high frequency (UHF) that is based on international safety guidelines. Moreover, The chipless tag able to diagnose and change its encoding reader depending on the iron level in the blood for patients who suffer from an increase or decrease the iron level, like (thalassemia, anemia, etc) to monitor and track their health situations. The simulation results obtained through(CST Microwave Studio), have shown New concept validity and proposed design efficiency can be directly printed outside.