Distributive lattices are well known to be precisely those lattices that possess cancellation: x ∨ y = x ∨ z and x ∧ y = x ∧ z imply y = z. Cancellation, in turn, occurs whenever a lattice has neither of the 5-element lattices M3 or N5 as sublattices. In this paper we examine cancellation in skew lattices, where the involved objects are in many ways lattice-like, but the operations ∧ and ∨ no l...

In this study, a repeated correlative coding scheme is proposed to combat the inter-carrier interference (ICI) caused by the frequency offset in orthogonal frequency division multiplexing (OFDM) communication systems. This proposed scheme combine two ideas of the well-known methods, which are the coding of adjacent subcarriers with antipodal of the same data symbol (ICI self-cancellation) and c...

In this paper, we present a frequency band threshold based on wavelet transform (FBT) noise cancellation method. The noise cancellation is enable to improve on the articulation of the speech. Although the edge information of the speech is very important for recognition system to use, most traditional noise cancellation methods based on spectrum analysis smooth these edges of the original speech...

Introduction: In excess of two million operations are performed in a day-case/ambulatory setting in the United Kingdom each year. Cancellations in elective surgery cost the National Health Service (NHS) over £265 million per year. Methodology: This is a retrospective study in which the total number of elective ENT operations performed at The Guy’s & St. Thomas’ NHS Trust in a 6-month period wer...

Code Division Multiple Access (CDMA) system is being most popular communication technique due to its robustness & spread spectrum techniques. The CDMA include the pseudo sequences (PN-sequences) which provide the secure communication over a wide band. But the Multiple Access Interference (MAI) limits the capacity of Direct Sequence Code Division Multiple Access (DS-CDMA) based systems. For DS-C...

background: the retrieval of good quality oocytes that is accomplished with selection of the best induction ovulation protocol on the basis of patients condition, age and cause of infertility, is one of the most important aspects of art cycles. the objective was to evaluate the efficacy of low dose, long acting gnrh-a (decapeptyle) for pituitary desensitization and outcome of art compared to lo...

* This work is supported by SXSF Grant #20041044. Abstract In CDMA systems multi-access interference (MAI) is a very important component resulting in poor reception performance, however parallel interference cancellation (PIC) can solve this problem to some extent. But in PIC process error cancellation of interference resulting from error decision at the former stage will influence the veracity...

We prove that a general miraculous cancellation formula, the divisibility of certain characteristic numbers, and some other topological results related to the generalized Rochlin invariant, the η-invariant and the holonomies of certain determinant line bundles, are consequences of the modular invariance of elliptic operators on loop space. 1. Motivations In [AW], a gravitational anomaly cancell...

This paper describes a method for noise removal from ultrasonic signals used in NDE (Non Destructive Evaluation) applications. The method used is FPGA based adaptive noise cancellation. Indeed adaptive filtering is one of the core technologies in digital signal processing. We can find numerous application areas in science as well as in industry. Adaptive filtering techniques are used in a wide ...