Abstract Aim To evaluate whether there has been a change in clinical or radiographic position and the resultant occurrence of complications unerupted ectopic teeth due to delayed treatment during COVID-19 pandemic Method Data was collected over three-month period at Royal United Hospital, Bath, Oral Maxillofacial Surgery Department. This via questionnaire distributed clinicians prospectively co...

In this paper, by combining modular forms and characteristic forms, we obtain general anomaly cancellation formulas of any dimension. For .4kC 2/–dimensional manifolds, our results include the gravitational anomaly cancellation formulas of Alvarez-Gaumé and Witten in dimensions 2, 6 and 10 [1] as special cases. In dimension 4k C 1 , we derive anomaly cancellation formulas for index gerbes. In d...

In this paper, a non-stationary errors-in-variables (EIV) model estimation method is proposed and applied to the problem of model estimation for noise-cancellation in transient electromagnetic mineral exploration. Alternative methods for noise cancellation in these systems rely on specific signal characteristics, and are thus less readily transferable to other applications. The proposed method ...

By studying modular invariance properties of some characteristic forms, we prove some new anomaly cancellation formulas which generalize the Han-Zhang and Han-Liu-Zhang anomaly cancellation formulas

A multiple-input multiple-output (MIMO) communication system combined with the orthogonal frequency division multiplexing (OFDM) modulation technique can achieve reliable high data rate transmission over a broadband wireless channel. A main challenge in wireless communication is retrieval of the channel state information and ICI cancellation. The channel estimation and ICI cancellation is estim...

Commonly used wideband adaptive feedback cancellation techniques do not provide satisfactory performance for reducing feedback oscillation in hearing aids. In this paper, a band-limited adaptive feedback cancellation algorithm using normalized filtered-X LMS techniques is proposed that provides good cancellation efficiency, convergence behavior and better output sound quality for speech signals...

This paper presents a cancellation theorem for the preorders in van Glabbeek’s linear time-branching time spectrum over BCCSP. Apart from having some intrinsic interest, the proven cancellation result plays a crucial role in the study of the cover equations, in the sense of Fokkink and Nain, that characterize the studied semantics. The techniques used in the proof of the cancellation theorem ma...

In this paper we study the effect of cancellation order on bit error rate (BER) performance of a Code Division Multiple Access (CDMA) system employing a linear Successive Interference Cancellation (SIC) receiver in both an Additive White Gaussian Noise (AWGN) channel and a Rayliegh fading channel. Four different ordering schemes are studied. We show that changing the cancellation order can lead...

This paper presents a 40GS/s track-and-hold amplifier with active cancellation. An active cancellation circuitry was implemented to mitigate the leakage caused by the parasitic capacitance of the sampling transistor. The cancellation technique increases the isolation between the track and hold modes, especially at high input frequencies. An SFDR3 of 62dB was measured for 5GHz input signal sampl...

In this paper successive interference cancellation (SIC) based on optical code division multiple access (O-CDMA) systems has been investigated. SIC scheme refers to a family of low complexity multi-user detection (MUD) methods for direct sequence CDMA systems. Performance of optical CDMA system is influenced by multiple access interference (MAI) resulted from the overlapping between the users. ...