Control of mussel Mytilus galloprovincialis Lamarck fouling in water-cooling systems using plasma discharge

To prevent marine macrofouling, the anti-fouling effect of liquid discharge on mussels Mytilus galloprovincialis Lamarck was investigated in a simulated water-cooling system. The effects of input energy, mussel distance from discharge center, continuous discharge time, and discharge energy distribution mode on mussel response (death or detachment) were systematically studied. The results showed that excellent anti-fouling effects could be achieved by increasing input energy, but the detachment rate and mortality of mussels decreased sharply when the mussels were farther away from the discharge center. Low frequency discharge for a long, continuous time and multiple stimuli at long intervals improved the anti-fouling effect. Shock waves are the most likely cause of mussel eradication, and the threshold values of peak pressure to prevent mussel settlement and to cause death were 0.02 MPa and 0.05 MPa, respectively.

Abstract WP374: Implementation of the Stroke Transition Discharge Center Improves 30-day Readmission Rate

Background: Stroke patients and their caregivers require formalized education, medications, testing and rehabilitation to assist in prevention of recurrence and of post-stroke complications for optimal outcomes. Objective: The purpose of this program was to evaluate the effect of the Stroke Transition Discharge Center (STDC) on stroke readmission. Methods: The Advanced Practice Nurses (APN) see all stroke and TIA patients one week after discharge from hospital to home or one week after discharge from rehab to home. During the hour encounter, the APN reviews medications, test results, signs and symptoms of stroke, complete education including patient specific risk factors and ensure appropriate follow up. The APN coordinates and facilitates multiple services and disciplines impacting the patient, assuring the most efficient and effective goal-directed activities are provided at the right time and in partnership with all other disciplines providing care. Results: Implementation of the STDC enhances patient outcomes and improves 30-day readmission rates. Prior to our intervention, the readmission rate was 15.3%. After the implementation of the STDC, there was a 61% reduction in 30-day readmission rates to 6%, which is significantly below the hospital system benchmark of 11%. There was an increase in the readmission rate in the first two quarters of 2016 noted. There is an inverse correlation with the number of patients seen in the STDC during the same time period. Further analysis demonstrates that only one readmission in this time period had been seen prior in the STDC. Conclusion: Implementing the Stroke Transition Discharge Center demonstrated a dramatic reduction in 30-day readmission rates. Our data suggests that utilization of the clinic and participation by the patients has a direct and inverse effect on readmissions. Further data will need to be collected to determine if this is a sustained response.

Mechanism of directional selectivity in simple neurons of the cat's visual cortex analyzed with stationary flash sequences

The properties of simple neurons showing selectivity to direction of motion in area 17 of the cat cortex were examined. We analyzed in particular a sample of cells receiving a projection from 0 to 10 degrees in visual angle from the area centralis of the cat retina. Three categories of simple neurons were examined: directionally asymmetric (DA) neurons, directionally selective neurons of the unimodal type (DS1), and bimodal types (DS2). Poststimulus time histograms (PSTH) were obtained to moving white and black bars as well as to static onset sequences and static offset sequences. Our analysis involves a comparison of responses to single static flashes at various receptive-field locations with responses to sequence pairs of static flashes at those same locations. We find that DA neurons are not sensitive to the direction in which a pair of stimuli are presented. Inhibitory and excitatory responses show properties of linear summation whatever the direction of the stimulus sequence. Their behavior is reminiscent of retinal and LGN neurons. The synergy model accounts well for a DA neurons's directional asymmetry. If pairs of stimuli are close enough (usually an interstimulus distance of 20' or less for the central 10 degrees of the cat's visual field), then DS neurons show striking departures from linear summation. Specifically, this departure entails an anisotropic distribution of inhibition. The directional selectivity of DS neurons cannot be explained on the basis of a simple linear combination of their on and off region's responses. Directional selectivity is produced entirely within an on-excitatory discharge region or entirely within an off-excitatory discharge region. The excitatory discharge center of even the simplest unimodal DS neuron can be shown to be decomposable into subunits smaller than that discharge center. The fact that the spread of this anisotropy of inhibition is often much more restricted than the entire extent of the DS neuron's excitatory discharge center argues strongly that underlying subregions or modules are contributing their inputs to DS neurons. A DS neuron does not analyze motion as an isolated unit; to the contrary, it is probably embedded in a pool of mutually "cooperative" DS neurons. The basic module of directional analysis is responsive either to an on-on sequence or an off-off sequence but not to both. It is not selective to an on-off sequence. Therefore, unimodal DS neurons (DS1) are performing an analysis of single moving edges.(ABSTRACT TRUNCATED AT 400 WORDS)