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关键词： Blockchain   Internet of things   RFID   Supply chain management   TDABC  

摘要： This study aims to estimate the costs of integrating RFID and IoT with blockchain for supply chain management. The study is based on the comparison of two simulation scenarios in a cheese supply chain, the as-is case vs. the integration of the following technologies: blockchain, smart contracts, RFID and IoT. Using the Time-Driven Activity-Based Costing method, costs are allocated for six actors: dairy farm, 3PL, wholesaler and three re-tailers. In addition, the costs of each player are allocated for each supply chain area: logistics, warehouse and order management. The study shows in which areas and for which actors implementing and integrating different technologies is economically suitable. Different procurement policies are modelled for evaluating the cost im-pacts for each retailer: Economic Order Quantity, Period Order Quantity and Lot for Lot. Moreover, the costs of non-compliant products are assessed in both scenarios. The results show that specific areas such as warehouse management and logistics in the to-be scenario are not economically optimized, however the entire supply chain cost is optimized. The area with positive economic feasibility for all the participants in the supply chain is order management. The combined use of technologies is economically beneficial when the Economic Order Quantity procurement policy is adopted. Finally, in the to-be scenario the non-compliant products management is economically optimized with economic benefits ranging from 8% to 63%.

关键词： ambient sensors   home agent   life monitoring   RFID   quality of life  

摘要： Aging of the population and the declining birthrate in Japan have produced severe human resource shortages in the medical and long-term care industries. Reportedly, falls account for more than 50% of all accidents in nursing homes. Recently, various bed-release sensors have become commercially available. In fact, clip sensors, mat sensors, and infrared sensors are used widely in hospitals and nursing care facilities. We propose a simple and inexpensive monitoring system for elderly people as a technology capable of detecting bed activity, aimed particularly at preventing accidents involving falls. Based on findings obtained using that system, we aim at realizing a simple and inexpensive bed-monitoring system that improves quality of life. For this study, we developed a bed-monitoring system for detecting bed activity. It can predict bed release using RFID, which can achieve contactless measurements. The proposed bed-monitoring system incorporates an RFID antenna and tags, with a method for classifying postures based on the RFID communication status. Experimentation confirmed that three postures can be classified with two tags, seven postures with four tags, and nine postures with six tags. The detection rates were 90% for two tags, 75% for four tags, and more than 50% for six tags.

关键词： Lightweight   Mutual authentication   Physical unclonable function (PUF)   Pseudo random number generator (PRNG)   Radio frequency identification (RFID)  

摘要： As one of the key identity authentication technologies in the Internet of Things (IoT), Radio Frequency Identification (RFID) technology has been widely adopted in various wireless communication fields. However, increasing security and privacy issues have been limiting the development of RFID system. Most of the existing RFID authentication protocols are vulnerable to many malicious attacks. Key updating is a common security mechanism in RFID authentication protocol, but the existing RFID authentication protocols using traditional key updating mechanism usually cannot resist against desynchronization attack. To address this issue, we present a new shared key updating method by using pseudo-random number generator (PRNG) with the seeds negotiated by tag and server. Moreover, a new bit flipping operation is proposed to reduce the computation cost of tag. On these basis, we design a lightweight RFID mutual authentication protocol SDRLAP based on double physical unclonable function (PUF) by using PRNG and bit flipping operation. Compared with most of the existing RFID authentication protocols with the traditional key updating mechanism, SDRLAP guarantees the security and privacy of RFID systems, and meanwhile has the obvious advantages in terms of computational cost, storage requirement and communication overhead.

关键词： LOCalizerTM   Non-palpable breast lesion   Radiofrequency   Multiple localization  

摘要： For many years, wire-guided localization represented the gold standard method for the detection of non-palpable breast lesions, despite the acknowledged limitations. LOCalizer (TM) is the most recent and promising radiofrequency identification system, characterized by the capability of measuring the distance from the tagged lesion in millimeters and the association of each marker with a unique code. A 45-year-old woman with two lesions suspected of cancer in the same breast was referred to our department. She underwent double localization with LOCalizer (TM) (Hologic, Santa Carla, CA, USA) of the lumps into opposite quadrants. We performed a mini-invasive and oncologically safe surgical excision through a tunneling approach after a peri-areolar incision. The surgical technique realized with Localizer (TM) could be an effective method for locating multiple non-palpable breast lesions and is able to offer excellent oncological and cosmetic results, as also confirmed by several reports in the literature.

关键词： RFID   object perception   RSS   phase information  

摘要： With the popularization of positioning technology, more and more industries have begun to pay attention to the application and demand of location information, and almost all industries can benefit from low-cost and high-precision location information. This paper introduces a novel three-dimensional (3D) low-cost, high-precision target perception algorithm that utilizes a Radio Frequency Identification (RFID) mobile reader and double tags. Initially, the Received Signal Strength (RSS) is employed to estimate the approximate position of the target along the length direction of the shelf. Additionally, double tags are affixed to the target, enabling the perception of its approximate height and depth through phase information measurements. Subsequently, the obtained rough position serves as an initial value for calibration using the proposed algorithm, allowing for the refinement of the target's length information relative to the shelf. Simulation results demonstrate the exceptional accuracy of the proposed method in perceiving the 3D position information of the target, achieving centimeter-level sensing accuracy.

关键词： Healthcare   Patient monitoring   Sensors   IoT   RFID   Edge intelligence   Protocol   Big data  

摘要： The Internet of Things (IoT) in the healthcare system is rapidly changing from the conventional hospital and concentrated specialist behavior to a distributed, patient-centric approach. With the advancement of new techniques, a patient needs sophisticated healthcare requirements. IoT-enabled intelligent health monitoring system with sensors and devices is a patient analysis technique to monitor the patient 24 h a day. IoT is swapping the architecture and has improved the application of different complex systems. Healthcare devices are one of the most remarkable applications of the IoT. Many patient monitoring techniques are available in the IoT platform. This review presents an IoT-enabled intelligent health monitoring system by analyzing the papers reported between 2016 and 2023. This survey also discusses the concept of big data in IoT networks and the IoT computing technology known as edge computing. This review concentrated on sensors and smart devices used in intelligent IoT based health monitoring systems with merits and demerits. This survey gives a brief study based on sensors and smart devices used in IoT smart healthcare systems.

关键词： Breast cancer   Primary lesion localization   Breast conserving surgery   Radiofrequency identification   RFID  

摘要： PurposeIn breast conserving surgery, accurate lesion localization is essential for obtaining adequate surgical margins. Preoperative wire localization (WL) and radioactive seed localization (RSL) are widely accepted methods to guide surgical excision of nonpalpable breast lesions but are limited by logistical challenges, migration issues, and legislative complexities. Radiofrequency identification (RFID) technology may offer a viable alternative. The purpose of this study was to evaluate the feasibility, clinical acceptability, and safety of RFID surgical guidance for localization of nonpalpable breast *** a prospective multicentre cohort study, the first 100 RFID localization procedures were included. The primary outcome was the percentage of clear resection margins and re-excision rate. Secondary outcomes included procedure details, user experience, learningcurve, and adverse *** April 2019 and May 2021, 100 women underwent RFID guided breast conserving surgery. Clear resection margins were obtained in 89 out of 96 included patients (92.7%), re-excision was indicated in three patients (3.1%). Radiologists reported difficulties with the placement of the RFID tag, partially related to the relatively large needle-applicator (12-gauge). This led to the premature termination of the study in the hospital using RSL as regular care. The radiologist experience was improved after a manufacturer modification of the needle-applicator. Surgical localization involved a low learning curve. Adverse events (n = 33) included dislocation of the marker during insertion (8%) and hematomas (9%). The majority of adverse events (85%) occurred using the first-generation *** technology is a potential alternative for non-radioactive and non-wire localization of nonpalpable breast lesions.

关键词： RFID   tag identification   characteristic group   group query   system efficiency   communication complexity  

摘要： How to obtain the information from massive tags is a key focus of RFID applications. The occurrence of collisions leads to problems such as reduced identification efficiency in RFID networks. To tackle such challenges, most tag collision arbitration protocols focus on scheduling tag identification with collision avoidance. However, how to effectively identify tags in collisions to improve identification efficiency has not been well explored. In this paper, we propose a group query allocation method to divide the string space into mutually disjoint subsets which contains several strings. Each string can be viewed as a full ID or partial ID of a tag. When multiple string from a subset are sent simultaneously, the reader can identify all of them in a time slot. Based on the group query allocation method, a segment detection based characteristic group query tree (SD-CGQT) protocol is presented for fast tag identification by significantly reducing the collision slots and transmitted bits. Numerous experimental results verify the superiority of the proposed SD-CGQT, compared to prior arts in system efficiency, total identification time, communication complexity and energy consumption.

关键词： 数据可视化操作   场站资产管理   可视化交互   资产管理系统   RFID  

摘要： 随着资产体量的增长，传统以人工进行资产管理的方式受到挑战，因此迫切需要将资产管理系统应用于企业，实现智能化高效管理。现存的资产管理系统大多着重于基本功能实现，较少关注如何借助可视化技术更好地辅助资产管理。鉴于此，提出“兼顾视觉效果与实用性的可视化管理”，通过可视化RFID终端智能读写资产数据，实现场景可视化、业务可视化、数据可视化的交互，并从数据集的交互能力、可配置场站布局、人性化交互方案3个方面创新了可视化交互模式，并设计实现了场站资产的可视化管理系统，现已成功应用于长宁天然气公司。该系统通过可视化技术更好地服务于资产管理，可有效提升资产管理效率，具有较高推广价值。

关键词： Internet of things  

摘要： Wireless localization is essential for tracking objects in indoor environments. Internet of Things (IoT) enables localization through its diverse wireless communication protocols. In this paper, a hybrid section-based indoor localization method using a developed Radio Frequency Identification (RFID) tracking device and multiple IoT wireless technologies is proposed. In order to reduce the cost of the RFID tags, the tags are installed only on the borders of each section. The RFID tracking device identifies the section, and the proposed wireless hybrid method finds the location of the object inside the section. The proposed hybrid method is analytically driven by linear location estimates obtained from different IoT wireless technologies. The experimental results using developed RFID tracking device and RSSI-based localization for Bluetooth, WiFi and ZigBee technologies verifies the analytical results. Copyright © 2023, The Authors. All rights reserved.