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摘要： Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

关键词： IoT   Lightweight cryptography   TEA algorithm   XTEA algorithm   XXTEA algorithm   Fiestel structure   FPGA   ASIC throughput  

摘要： Y The current era of ubiquitous computing has led to the emergence of a sub-domain in cryptography called Lightweight Cryptography, which deals with imparting adequate security to resource constraint devices like IoT devices, RFID tags with a suitable choice of design metrics. The advancement in network connectivity and data handling capabilities shows the tremendous growth of IoT in physical life. The number of connected devices have been increasing throughout IoT applications, leaving severe security concerns behind. There is a need of secure communication which can be fulfilled with lightweight algorithms. The motive of this work is to implement the optimized lightweight ciphers and model its design metrics. Design has to be simulated to implement the cipher in hardware from which different metrics can be measured. TEA, XTEA and XXTEA ciphers have been used to fulfil the objective stated and were modelled, implemented and optimized on specific hardware technology like Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) platform. Designs have been implemented to examine numerous properties like block sizes, rounds of implementations and key scheduling part. This paper presents four hardware architectures namely TEA (T1), XTEA (T2), XXTEA (T3) and hybrid model (T4). T1, T2 and T3 have been implemented using pipelined method with percentage improvement in frequency is 75.9%, 162% and 89%. Similarly, the enhancement in terms of area has been 85.43%, 57.08% and 90.79%. T4 presents a hybrid model which is also a pipelined architecture that combines TEA family (TEA, XTEA and XXTEA) in a single design. The percentage improvement of gate equivalent (GE) for T2 is 47.50%. The hybrid model (T4) has the same throughput as that of T1, T2 & T3 and has less GE when compared to combined GE of all three. Efficiency improvement of all the novel architectures are more than eighteen times as compared to the existing literature.

关键词： Authentication technology   chipless radio-frequency identification (RFID) tag   machine learning (ML)   uniqueness  

摘要： In this article, a millimeter-wave (mmWave) chipless radio-frequency identification (RFID) tag is developed to operate in the V-band for authentication applications. A novel approach based on tag backscattered E-field measurements at different orientation angles for unitary classification is proposed. The concept is based on the hardness to identically reproduce materials due to the inherent randomness in the fabrication process. These uncertainties are transcribed in very small variations that can be observed in the tag electromagnetic response. A set of 16 identical tags were fabricated, and each tag shares the same fabrication mask and manufacturing process method. Spatial diversity using the tag backscattering pattern (at two different angles) adds independent characteristics for estimating authenticity of each tag. To better exploit the large amount of data collected with this approach, a machine learning (ML) sighting classification is used, which enhances the system performance. The probability of error (PE) achieved with the method is around 1%. This PE is four times lower than the one obtained with a similar approach implemented in the X-band.

关键词： chipless RFID sensor   strain sensor   chipless RFID tag  

摘要： This paper contains two main areas of research: First, this work outlines a novel, highly sensitive strain sensor design that should support various levels of deformation, depending on the substrate type used. Physical implementations in this work have focused on proving its large deformation capabilities, and simulations have been used to assess its more general electromagnetic response. The other part of this paper focusses on exploring other effects that will impact the sensing of strain of resolutions below 10 mu epsilon, which is a capability achieved by other aerospace-grade strain sensor technologies. These effects are limited to mechanical swelling and sensor orientation in the azimuth and elevation planes, as these appear to be unexplored and highly relevant issues to the topic of chipless RFID-based strain sensing. From this exploration, it is apparent that the effects of mechanical swelling and sensor orientation (amongst others) will need to be addressed in any real-life implementation of the sensor, requiring a strain resolution below 10 mu epsilon.

关键词： Exercise   Energy expenditure   Measurement   Stairs   Technology   Walking  

摘要： This study sought to test the validity of radio frequency identification (RFID) technology to measure indoor stair walking. RFID and Bluetooth sensors (accelerometers with the proximity function) were placed at landings across three floors within a stairwell. Participants (n = 29) were randomized to stair walking or sedentary control and concomitantly wore RFID tags at the hip, chest and neck. An accelerometer worn at the hip captured criterion physical activity data. RFID devices detected sedentary control and stair walking participants (mean RFID detections: 15.50, 47.33 respectively). Neck lanyard RFID tags were detected most frequently. RFID correctly classified all participants in both groups. RFID-based energy expenditure estimates were strongly correlated with accelerometer estimates (r = 0.78-0.94). Percent agreement for floor detection between the Bluetooth and RFID readers (38.6%) was consistent with known limitations of Bluetooth proximity sensing. It is concluded that, during self-paced stair walking in young adults, RFID devices provide valid data on participant movement and estimated energy expenditure.

关键词： Microstrip antennas  

摘要： A four-port dual-band dual circularly polarized (CP) stack-up patch antenna is introduced for multiple-input-multiple-output (MIMO) RFID application. The proposed antenna adopts two FR 4 substrates and one Rogers Ro4350b substrates. Two pairs of isolated ports work at FCC UHF/MW-RFID bands (0.902-0.928 and 2.4-2.485 GHz) with port isolations of 20 dB and 25 dB, respectively. Four inverted-F radiating elements fed with a 90 degrees phase-delay feeding network realize the CP radiation at the FCC UHF-RFID band (0.902-0.928 GHz). The corner-truncated square slot and patch are implemented to obtain CP modes at the MW-RFID band. The relative impedance bandwidths in the FCC UHF and MW band are 10.9% and 9.4%, respectively, with peak gains of 4.1 and 7.2 dBic. The antenna's MIMO performance of envelope correlation coefficient (ECC) is lower than 0.01, and diversity gain (DG) is close to 10 dB. Thanks to the stack-up configuration, the dual-band RFID antenna realizes good antenna performance with a compact size of 0.6 x 0.6 x 0.07 lambda(3).

关键词： Radio frequency identification (RFID)  

摘要： Tag identification in a fast-moving environment is an emerging challenge for future RFID systems. However, existing literatures on the tag reading protocol design primarily apply to stationary scenarios, which fail to cope with mobile environments with unreliable channel condition. In this paper, we first review various types of prior reading protocols and then discuss a new direction of mobile tag reading by proposing a novel partitioning strategy. This analysis and experimental results show its superiority in achieving reading performance for the UHF RFID system under a mobile environment.

关键词： RFID   项目管理   质量管理  

摘要： 2018年6月江西省某高校上马“图书馆超高频RFID智能管理系统”项目,项目总投资675万元,工期8个月,由中央财政支持地方高校发展专项资金拨款,是江西省高校图书馆信息化建设的重点工程。该项目是以RFID技术为基础,结合计算机技术、数据库技术、PLC技术和网络通讯等技术,来实现图书自助借还及图书编、典、采和日常管理工作的一套应用集成系统。

关键词： 物联网   射频识别   教学探究   课程  

摘要： 通过对物联网RFID原理及应用课程的教学探究,力求使理论教学与实践教学相结合,打造出一门适合物联网工程专业,且适应物联网技术发展需求的精品课程。使学生通过本课程的学习,让学生能够全面了解RFID基本理论,掌握RFID应用技术及方法,能够构建RFID应用系统,可初步具有综合运用所学科学理论和技术手段分析并解决工程问题的基本能力,具有制订系统设计方案、进行需求分析和软件开发的能力。

关键词： Monitoring   Abdomen   Diseases   Volume measurement   Temperature sensors   RFID tags   Phase measurement   Backpropagation (BP) neural network   phase   respiratory volume   RFID  

摘要： Continuous and accurate respiratory volume monitoring is crucial in many healthcare-related applications. Traditional respiratory volume monitoring approaches involve obtrusive devices that are uncomfortable for long-term monitoring, while unobtrusive approaches mainly focus on sensing the respiratory rate, which is insufficient for many healthcare-related applications. In this article, we present radio-frequency respiratory volume monitoring (RF-RVM), an unobtrusive system to sense the respiratory volume based on commercial off-the-shelf (COTS) RFID devices. Specifically, RF-RVM continuously collects the temporal phase information from tags attached to the chest and abdomen to extract the chest displacement and abdomen displacement caused by respiration. Then, we assess the respiratory volume by training a backpropagation neural network model to correlate chest and abdomen displacements and respiratory volume. We use a reference tag attached under the user's neck to eliminate the noise caused by slight movements of the upper body during respiration. We implement and evaluate RF-RVM based on COTS RFID devices. The experimental results show that RF-RVM can continuously monitor user's respiratory volume with an average accuracy of 94.52% for leave-one-session-out cross-validation and 91.96% for leave-one-record-out cross-validation based on a data set sampled from 20 volunteers.