Arthur J. Stein

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The haloed line effect is a technique where when a line in three-dimensional space passes in front of another line, a gap is produced in the projection of the more distant line. The gap is produced as if an opaque halo surrounded the closer line. This method for approximate hidden-line-elimination is advantageous because explicit surface equations are not(More)
The 2-[18F]fluoro-2-deoxy-D-glucose technique was used to measure regional cerebral glucose utilization by human subjects during functional activation. Normal male volunteers subjected to one or more sensory stimuli (tactile, visual, or auditory) exhibited focal increases in glucose metabolism in response to the stimulus. Unilateral visual hemifield(More)
OBJECTIVE One mechanism underlying the link between multiple sclerosis (MS) and Epstein-Barr virus (EBV) might be a direct CNS infection. Viral CNS infections cause elevated antibody indices (AIs). Elevated EBV AIs were found in MS; however, patients with MS frequently show a polyspecific intrathecal immune response with elevated antiviral AIs. To(More)
We used 18-F-fluoro-2-deoxyglucose positron emission tomography (PET) and computed tomography (CT) to study eight patients with homonymous hemianopias or quadrantanopias due to ischemic lesions of the visual pathways. Four patients with ischemic damage to all or part of the occipital lobe had decreased glucose metabolism in the affected region. Three(More)
OBJECTIVE Notch-filtered music has been shown to induce frequency-specific inhibition. Here, we investigated which cortical structures are affected by tailor-made notched music (TMNM) in tinnitus patients and how this inhibition-induced plasticity develops over time. METHODS Nine subjects suffering from chronic tonal tinnitus listened to music passing(More)
This report describes a computer system that generates reconstructions of film autoradiographs of the cerebral cortex. The reconstructions preserve 4 dimensions of the data including the (1) rostro-caudal and (2) medio-lateral cortical dimensions, (3) cortical thickness and (4) optical density value. This system is especially useful as it removes the(More)
For an efficient exploration of integrated remote sensing and GIS datasets of high dimensionality, virtual reality technology is likely to offer much promise in the future and is likely to become indispensable alongside developments in 3-dimensional visualisation techniques. The aim of this study was to investigate how new and emerging technologies may be(More)
Some authors contend that interdependence is low or declining, others that interdependence is high or increasing. The present essay, offering new data on trade, investment, financial, and political sectors, seeks to draw a trial balance between such views and to show that: (1) some significant forms of economic interdependence have grown since 1913; (2) the(More)
A computer system for the analysis of computed tomography and positron emission tomography scans of the brain is described. The system, called TOAP (Tomographic Overlay and Analysis Program), permits the registration of user specified slices from a digital brain atlas with the tomographic images. Regions of interest can then be defined with respect to the(More)
" Long data " , i.e., temporal data disaggregated to short time intervals to form a long time series, is a particularly interesting type of " big data ". Financial data are often available in this form (e.g., many years of daily stock prices), but until recently long data for other social, and even other economic, processes have been rare. Over the last(More)