Performance of Crosstalk Cancellation in VDSL

Crosstalk in DSL leads to significant performance degradation and large loses in data-rate. Several crosstalk cancellation techniques have been proposed to address this problem, however, in the existing literature the analysis of these approaches is based on SNR calculations and the SNR-gap approximation. Furthermore, for crosstalk cancellation techniques based on decision feedback, the effect of error propagation is completely ignored. This makes it hard to predict the performance of crosstalk cancellation in real life, and to see if the significant potential gains can actually be realized. To address this problem, this paper uses Monte-Carlo simulation to investigate the performance of the various crosstalk cancellation techniques that have been proposed. The effect of noise-enhancement in zero-forcing crosstalk cancellers and error-propagation in decision-feedback cancellers is examined. The results confirm that a very simple crosstalk cancellation structure can achieve near-optimal performance

CONCEPTUAL STUDY OF THE EFFECT OF MADHU IN NEONATAL PAIN MANAGEMENT

New born under go various minor procedures like venipuncture for various purposes. The ability of neonates to perceive pain and to react is fully or nearly fully developed in the neonatal period as most of the anatomical pathways and neurotransmitter necessary for pain perception are developed. The prevention of pain is important not only because it is an ethical expectation but also because repeated painful exposures can have deleterious consequences. Procedural pain causes physiological changes in the body of a neonate, where an inflammatory response to the damaged tissues is initiated, while a stress response induces hormonal and metabolic changes affecting stability of the homeostasis.An Ayurvedic approach should be considered in the field of Kaumarbhritya for Vedanasthapan in newborn as an alternative or better medicine than common available modern drugs.According to Ayurveda, pain is initiated by Vata and activities of Vata are mainly perceived through Rakta Dhatu as illustrated in Charak Samhita. Thus any kind of Aghat will sensitize the pain perception via Rakta Dhatu.Madhu a Shonitsthapan drug with Sandhaniya property is expected to reduce the Raktadushti and eventually reducing the pain perception.This review is carried out with an aim to understand the pain perception mechanism in Ayurvedic principle and to formulate Ayurvedic management protocol. The presentation of neonatal pain management is critically reviewed from various database and classical texts

Adaptive NLMS Partial Crosstalk Cancellation in Digital Subscriber Lines

Crosstalk is a major limitation to achieving high data-rates in next generation VDSL systems. Whilst crosstalk cancellation can be applied to completely remove crosstalk, it is often too complex for application in typical VDSL binders, which can contain up to hundreds of lines. A practical alternative, known as partial cancellation limits the cancellation to crosstalkers that cause severe interference to the other lines within the binder. In real VDSL systems, the crosstalk environment changes rapidly as new lines come online; old lines go offline, and the crosstalk channels change with fluctuations in ambient temperature. Therefore, adaptive crosstalk cancellers are often required. In this paper, we propose a new detection guided adaptive NLMS method for Adaptive Partial Crosstalk Cancellation that detects significant crosstalkers and tracks variations in their crosstalk channels. This exploits the sparse and column-wise diagonal dominant properties of the crosstalk channel matrix and leads to fast convergence, accurate crosstalk channel tracking, with a lower update complexity. The end result is an adaptive Partial Crosstalk Cancellation algorithm that has lower run-time complexity than prior state-of-the-art whilst yielding comparatively high data-rates and reliable service

Mucormycosis: a rare but rising fungal infection in COVID-19 patients at tertiary care centre

Background: New pandemic Coronavirus disease 2019 (COVID-19) shows wide range of disease pattern from mild to life threatening pneumonia in association with bacterial and fungal infections. Invasive fungal infections are becoming new burden in COVID-19 patients especially when associated with diabetes mellitus.Methods: We have studied 90 patients of invasive fungal sinusitis at tertiary care centre over a period of 3 months from March 2021 to June 2021 prospectively. All patients suspected for invasive fungal sinusitis in association with covid19 are included. Results: 67 males and 23 females of age group 41 to 70 years were presented as case of invasive fungal sinusitis with suspicion of Mucormycosis. Disease extended to orbit in 90 patients, to hard palate in 33 and skin involved in 5 patients. Diagnosis based on clinical presentation, computed tomography (CT scan) findings, KOH preparation and culture. KOH showing fungal elements in 62 patients and fungi isolated in 37 patients. Aspergillus group and mucorales contribute equally being found in 17 samples each. 23 patients lost their life due to this disease. This study is done and reported first time from this tertiary care centre.Conclusions: Invasive fugal sinusitis including Mucormycosis otherwise rare disease has significantly increased in COVID-19 pandemic. Immune dysregulation due to COVID-19, Diabetis mellitus and wide spread use of corticosteroids/antibiotics all contributed to this rise in cases of invasive fungal diseases. Early diagnosis, surgical intervention and antifungal treatment help to reduce mortality and morbidity

Performance of Crosstalk Cancellation in VDSL

Crosstalk in DSL leads to significant performance degradation and large losses in data-rate. Several crosstalk cancellation techniques have been proposed to address this problem, however, in the existing literature the analysis of these approaches is based on SNR calculations and the SNR-gap approximation. Furthermore, for crosstalk cancellation techniques based on decision-feedback, the effect of error propagation is completely ignored. This makes it hard to predict the performance of crosstalk cancellation in real life, and to see if the significant potential gains can actually be realized. To address this problem, this paper uses Monte- Carlo simulation to investigate the performance of the various crosstalk cancellation techniques that have been proposed. The effect of noise-enhancement in zeroforcing crosstalk cancellers and error-propagation in decision-feedback cancellers is examined. The results confirm that a very simple crosstalk cancellation structure can achieve near-optimal performanc