Julian Webber

a single reciprocating file will be very attractive both in terms of time and cost saving. At present there are three files in the WaveOne single file reciprocating system available in lengths 21mm, 25mm and 31mm. (Figure 1): 1. The WaveOne Small file is used in fine canals. The tip size is ISO 21 with a continuous taper of 6% 2. The WaveOne Primary file is used in the majority of canals. The tip size is ISO 25 with an apical taper of 8% that reduces towards the coronal end 3. The WaveOne Large

The sixth generation (6 G) communication standard is expected to include support for very-high data rates (over 100 Gbit/s) and device electronics will require processors with on-chip communications able to support such high bandwidths. Although the terahertz band possesses ample bandwidth, conventional THz waveguides suffer from high bending losses and are sensitive to process defects. The recent revelation of the topological valley photonic crystal (VPC), which exhibits near zero-loss bends, z

Variations in photovoltaic (PV) module current-voltage curves result in a power loss in PV arrays often referred to as mismatch loss (MML). As a means of reducing MML, newly fabricated PV modules are sorted to meet a set tolerance for variation in overall maximum power output with respect to a given module’s rated power. Starting with flash test data sets for two different polycrystalline PV modules and a simulated sorting procedure, Monte Carlo techniques were used to generate a large number of

In this Letter, we experimentally demonstrate low noise 300 GHz wave generation based on a Kerr microresonator frequency comb operating in the soliton regime. The spectral purity of a 10 GHz GPS-disciplined dielectric resonant oscillator is transferred to the 300 GHz repetition rate frequency of the soliton comb through an optoelectronic phase-locked loop. Two adjacent comb lines beat on a uni-traveling carrier photodiode emitting the 300 GHz millimeter-wave signal into a waveguide. In an out-of

We have recently proposed a multi-band wireless local area network (WLAN) system as a solution to the increasingly crowded frequency space. Efficiency can be improved by an agile transceiver that transmits on an idle channel on either or both bands concurrently, and a busy/idle (B/I) predictor will form part of the sensing unit for such a system. A probabilistic neural network (PNN) is studied here for predicting upcoming WLAN B/I status based on pattern matching and classification of previous s

Abstract The authors report on a real‐time 48‐Gbit/s terahertz band wireless communication experiment employing a pair of resonant tunnelling diodes at the receiver and uni‐travelling carrier photodiodes at the transmitter. The wireless transmission of uncompressed full‐resolution 8K ultra high‐definition television video signal is successfully demonstrated in the 300‐GHz band for the first time.

Gesture recognition (GR) has many applications for human-computer interaction (HCI) in the healthcare, home, and business arenas. However, the common techniques to realize gesture recognition using video processing are computationally intensive and expensive. In this work, we propose to task existing visible light communications (VLC) systems with gesture recognition. Different finger movements are identified by training on the light transitions between fingers using the long short-term memory (

Human activity recognition (HAR) employs machine learning for the automated recognition of motion and has widespread applications across healthcare, daily-life and security spaces. High performances have especially been demonstrated using video cameras and intensive signal processing such as the convolutional neural network (CNN). However, lower complexity algorithms operating on low-rate inertial data is a promising approach for portable use-cases such as pairing with smart wearables. This work

Accurate segmentation of lung lesions in CT-scan images is essential to diagnose lung cancer. The challenges in lung nodule diagnosis arise due to their small size and diverse nature. We designed a transformer-based model EDTNet (Encoder Decoder Transformer Network) for PNS (Pulmonary Nodule Segmentation). Traditional CNN-based encoders and decoders are hindered by their inability to capture long-range spatial dependencies, leading to suboptimal performance in complex object segmentation tasks.

The authors examine a resonant tunnelling diode (RTD)‐based wireless transceiver system in conjunction with radio‐over‐fibre (RoF) and identify the performance limiting factors. Ultra high‐definition television 4K‐video over 1 km fibre and 15 cm wireless is demonstrated. In addition error‐free data transmission up to 11 Gbit/s over 1 km fibre and 10 cm wireless is also presented. Eye‐diagram and jitter results for laboratory RoF equipment show the performance is not degraded with respect to an R

Hand gestures are a natural and efficient means to control systems and are one of the promising but challenging areas of human–machine interaction (HMI). We propose a system to recognize gestures by processing interrupted patterns of light in a visible light communications (VLC) system. Our solution is aimed at the emerging light communication systems and can facilitate the human–computer interaction for services in health-care, robot systems, commerce and the home. The system exploits existing