We report a case of Baló's concentric sclerosis (a variant of multiple sclerosis) from Papua New Guinea. A 42-year-old woman with a past episode of optic neuritis presented with a left hemiparesis. Magnetic resonance imaging revealed a solitary large tumour-like right cerebral lesion with a pattern of concentric bands of different signal intensities. The diagnosis was established by biopsy of t...

In these research paper two designs such as rectangular microstrip antenna and concentric equilateral triangular microstrip antenna are presented. The resonant frequency of this antenna is 8 GHz suitable for wireless applications. The antenna is fed by microstrip feeding technique. Design of an antenna using ADS (Advanced Design System), based on MoM (Method of Moments) has been used to analyze...

A 45-year-old man presented with progressive Broca aphasia and right hemiparesis. MRI demonstrated a large white matter lesion with multiple rings (figure). These centrifugal rings reflect concentric layers of active demyelination, typical for Baló concentric sclerosis. CSF showed oligoclonal bands and a mild pleocytosis. Partial recovery followed 5 days of treatment with IV methylprednisolone ...

Baló's concentric sclerosis is a rare atypical form of multiple sclerosis characterized by striking concentric demyelination patterns. We propose a robust mathematical model for Baló's sclerosis, sharing common molecular and cellular mechanisms with multiple sclerosis. A reconsideration of the analogies between Baló's sclerosis and the Liesegang periodic precipitation phenomenon led us to propo...

We introduce families of jointly symmetric, binary distributions that are generated over directed star graphs whose nodes represent variables and whose edges indicate positive dependences. The families are parametrized in terms of a single parameter. It is an outstanding feature of these distributions that joint probabilities relate to evenly spaced concentric rings. Kronecker product character...

background: menopause is associated with changes in body composition in postmenopausal women. the aim of this study was to compare the effects of tibolone and continuous combined hormone therapy (ht) on body composition in postmenopausal women. materials and methods: in this randomized clinical trial, 120 menopausal women were randomly selected and divided into three groups. of these, 40 women ...

Concentric circular arrays are increasingly shown more interest in antenna design for generating low sidelobe patterns as they have radial symmetry and an invariant beam in the azimuthal plane. Such patterns are desirable in low EMI applications. In the present work, an attempt is made to generate low sidelobe patterns from concentric circular arrays by optimizing both ring radii and individual...

We have constructed a poker classification system which makes informed betting decisions based upon three defining features extracted while playing poker: hand value, risk, and aggressiveness. The system is implemented as a poker player agent, and as such, the goals of the classifier are not only to correctly determine whether each hand should be folded, called, or raised, but to win as many ch...

in this study we investigate voice productions of normal speakers and patients with varying vocal fold adduction deficiencies using a noninvasive method to measure spatial vibrations of the larynx. the current version accv4 of our acceleration sensor device was used. The study’s primary goal is to find out whether lesions of vocal folds lead to additional spatial vibration modes compared to a n...

Psychophysical data demonstrate that orientation information in concentric, random-dot Glass patterns is summed linearly to extract a global form percept. Surprisingly, no such global pooling was found for Glass patterns with parallel structure. A simple neural model explains these results and agrees with recent V4 single unit physiology. As V4 provides the major input to IT, global concentric ...