Multiple sclerosis (MS) is a chronic inflammatory disease of the CNS. Its most frequent and typical initial forms of presentation are neuritis optica or arrays of sensory-motor symptoms. Nevertheless, a small minority of patients (about 1%) experience changes in mood, behaviour, personality, or cognition as initial manifestations of MS. This may result in an erroneous diagnosis of a primarily p...

We construct quasiconformal mappings in Euclidean spaces by integration of a discontinuous kernel against doubling measures with suitable decay. The differentials of mappings that arise in this way satisfy an isotropic form of the doubling condition. We prove that this isotropic doubling condition is satisfied by the distance functions of certain fractal sets. Finally, we construct an isotropic...

The authors present the central capacity sharing (CCS) model and derive equations describing its behaviors to explain results from dual-task situations. The predictions of the CCS model are contrasted with those of the central bottleneck model. The CCS model predicts all of the hallmark effects of the psychological refractory period (PRP) pardigm: -1 slope of the PRP effect at short stimulus on...

Stimuli that are clearly positive or negative (hence valence-laden stimuli) have the potential to interrupt unrelated task processing. A typical example is the emotional Stroop effect (ESE) in which responding to a certain task feature (e.g., color) is delayed by the presentation of task-irrelevant valent stimuli (e.g., negative pictures) compared to valence-neutral stimuli. Here we scrutinize ...

Abstract. Given a doubling measure μ on R, it is a classical result of harmonic analysis that Calderón-Zygmund operators which are bounded in L(μ) are also of weak type (1, 1). Recently it has been shown that the same result holds if one substitutes the doubling condition on μ by a mild growth condition on μ. In this paper another proof of this result is given. The proof is very close in spirit...

A change in subtask order in the psychological refractory period (PRP) paradigm increases the effect of stimulus onset asynchrony (SOA) on the second response. We used a paradigm with cued, randomly determined subtask order to test the hypothesis that this SOA by order switch overadditivity reflects order control, via "copying" stimulus order. In Experiments 1a and 1b, overadditivity was eviden...

What implications does a dirty-handed politician‟s assertion that dirty hands are necessary for certain political achievements have on our understanding of the relationship between political actors and the political community? The problem of dirty hands, as described in Michael Walzer‟s “Political Action: The Problem of Dirty Hands,” occurs when a political actor finds that he must transgress o...

purpose: to determine the prevalence of ocular involvement in patients with tuberculosis (tb) infection. methods: all patients with a new diagnosis of tb who were referred to zahedan tuberculosis center underwent a complete ophthalmic examination. any cases of known ophthalmic disease or previous ocular involvement were excluded from the study. prevalence of ocular involvement with 95% confiden...