Recently, there have been widely conducted researches on dual-band radio frequency identification (RFID) tag based on 13.56 MHz (HF) and 900 MHz (UHF). Most dual-band RFID tag has been implemented so that each antenna is separated in a different inlay sheet respectively, which makes the resulting smart card impractically thick, and the typical drawback of dual-band RFID tags incorporated in one...

Mobile telephones and their base stations are an important ultra high frequency-electromagnetic field (UHF-EMF) source and their utilization is increasing all over the world. Epidemiological studies suggested that low energy UHF-EMF emitted from a cellular telephone may cause biological effects, such as DNA damage and changes on oxidative metabolism. An in vivo mammalian cytogenetic test, the m...

We give a complete classification up to cocycle conjugacy of uniformly outer actions of Z on UHF algebras. In particular, it is shown that any two uniformly outer actions of Z on a UHF algebra of infinite type are cocycle conjugate. We also classify them up to outer conjugacy.

A main application in radio frequency identification (RFID) sensor networks is the function that processes real-time tag information after gathering the required data from multiple RFID tags. The component technologies that contain an RFID reader, called the interrogator, which has a tag chip, processors, coupling antenna, and a power management system have advanced significantly over the last ...

Design of Converter transformer insulation is a major challenge. The insulation of these transformers is stressed by both AC and DC voltages. Particle contamination is one of the major problems in insulation structures, as they generate partial discharges leading it to major failure of insulation. Similarly corona discharges occur in transformer insulation. This partial discharge due to particl...

Objective: To document and review advances and groundbreaking progress in cardiac and body magnetic resonance (MR) at ultrahigh fields (UHF, B0≥7.0 T) with the goal to attract talent, clinical adopters, collaborations and resources to the biomedical and diagnostic imaging communities. Methods: This review surveys traits, advantages and challenges of cardiac and body MR at 7.0 T. The considerati...

WISP is a wireless, battery-free platform for sensing and computation that is powered and read by a standards-compliant Ultra-High Frequency (UHF) RFID reader. The notable features of the device are a wireless power supply, UHF backscatter communication, and a fully programmable

This paper describes the first comprehensive benchmark suite for passive UHF RFID tags. These benchmarks give good indications as to how well RFID products will work in “real world” scenarios. We present benchmarks and give some experimental results, as well as key insights that these benchmarks have revealed about the nature of current UHF RFID tags on the market.

Today, the scientific community and the space organizations are becoming increasingly interested in the use of UHF radar sensors for global observation of forested ecosystems. This interest has challenged the radio science community to develop innovative and improved approaches to problems associated with the spaceborne UHF propagation and scattering of microwaves in forest applications. In thi...

Common acoustic partial discharge (PD) and vibration measurements use sensors attached on the outside tank wall of (power) transformers. Hereby, tank structure can lead to severe signal damping which in practice often leads to acoustic PD signals below noise level. Scope of the work is an acoustic and ultra-high frequency (UHF) detection of PD and additional recording of transformer vibrations ...