To compensate the performance degradation induced by polarisation mode dispersion (PMD) in high-speed optical transmission, a single-input multiple-output (SIMO) decision feedback equaliser (DFE) technique is proposed to combat all orders of PMD-induced distortion. The scheme is based on a new SIMO PMD channel model which utilises information embedded in both polarisation states. The performanc...

This paper describes how to adapt a static code analyzer to help novice programmers realize their mistakes , as current analyzers give feedback which is not very useful for novice programmers. An extension to PMD was made so that feedback messages appear which are easier to understand for novice programmers. Firstly, the current limitations of PMD were looked at by looking at their feedback of ...

In this study we provide a comprehensive analysis of the hypothalamic activation pattern during exposure to a live predator or an environment previously associated with a predator. Our results support the view that hypothalamic processing of the actual and the contextual predatory threats share the same circuit, in which the dorsal premammillary nucleus (PMd) plays a pivotal role in amplifying ...

Psychomotor disturbances (PMD) are a classic feature of depressive disorder that provides rich clinical information. The aim our narrative review was to characterize the functional anatomy of PMD by summarizing findings from neuroimaging studies. We found evidence across several neuroimaging modalities that suggest involvement of fronto-striatal neurocircuitry, and monoaminergic pathways and me...

We present a vector theory of four-wave mixing in optical fibers and use it to discuss the effect of polarization-mode dispersion (PMD) on the performance of parametric amplifiers and wavelength converters. We show that PMD distorts the gain spectrum and makes it less uniform than that expected in the absence of residual birefringence. PMD also induces large fluctuations in the amplified or wav...

Placental mesenchymal dysplasia (PMD) is a rare condition of placentomegaly and abnormal chorionic villi often clinically mistakenly as partial hydatidiform mole. However, it is clinicopathologically distinct with high incidence of intrauterine growth restriction (IUGR) and fetal death. This study presents 11 new PMD cases and provides a meta-analysis of the associated IUGR and fetal death rate...

We present a vector theory of Raman amplification and use it to discuss the effect of polarization-mode dispersion (PMD) on the Raman gain process inside the optical fiber used for stimulated Raman scattering. We show that the PMD induces large fluctuations in the amplified signal and reduces the average value of the amplifier gain. In the case of forward pumping, fluctuations are expected to b...

Polarization mode dispersion (PMD) is a challenge for high-data-rate optical-communication systems. More researches are desirable for impairments that is induced by PMD in high-speed optical orthogonal frequency division multiplexing (OFDM) transmission system. In this paper, an approximately analytical method for evaluating the power penalty due to first-order PMD in optical OFDM with quadratu...

Initial studies of dementia due to lobar atrophy (Pick's disease and Dementia of the Frontal Lobe Type, DFT) indicate neurochemical profiles distinct from that of Alzheimer's disease (AD) [1,2]. We have examined the cortical serotonergic profile of previously frozen human brains from control patients (n=27, 178: 1 O? , age 68 f 10 yrs, postmortem delay (PMD) 30 f 20 hrs, mean f s.d.) and patien...

List of abbreviations Alzheimer’s Disease, AD; Amyloid Precursor Protein, APP; Beta-Amyloid, Aβ; Bovine Spongiform Encephalopathy, BSE; Creutzfeldt-Jakob Disease, CJD; Central Nervous System, CNS; Immunofluorescence, IF; Immunoprecipitation, IP; Enzyme Linked Immunosorbent Assay, ELISA; Huntingtin, Htt; Huntington’s Disease, HD; Immunohistochemistry, IHC; Luminescent Conjugated Oligothiophenes,...