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Virtual displays and virtual environments
Gilkey, R.H.,Isabelle, S.K.,Simpson, B.B. Ergonomics Society of Korea 1997 大韓人間工學會誌 Vol.16 No.2
Our recent work on virtual environments and virtual displays is reviewed, including our efforts to establish the Virtual Environment Research, Interactive Technology, And Simulation (VERITAS) facility and our research on spatial hearing. VERITAS is a state-of -the-art multisensory facility, built around the ${CAVE}^{TM}$ technology. High-quality 3D audio is included and haptic interfaces are planned. The facility will support technical and non-technical users working in a wide variety of application areas. Our own research emphasizes the importance of auditory stimulation in virtual environments and complex display systems. Experiments on auditory-aided visual target acquistion, sensory conflict, sound localization in noise, and loxalization of speech stimuli are discussed.
Vasavi R Gorantla,Vernon Bond Jr,James Dorsey,Sarah Tedesco,Tanisha Kaur,Matthew Simpson,Sudhakar Pemminati,Richard M. Millis 대한약침학회 2019 Journal of pharmacopuncture Vol.22 No.3
Objectives: Attentional and memory functions are important aspects of neural plasticity that, theoretically, should be amenable to pharmacopuncture treatments. A previous study from our laboratory suggested that quantitative electroencephalographic (qEEG) measurements of theta/beta ratio (TBR), an index of attentional control, may be indicative of academic performance in a first-semester medical school course. The present study expands our prior report by extracting and analyzing data on frontal theta and beta asymmetries. We test the hypothesis that the amount of frontal theta and beta asymmetries (fTA, fBA), are correlated with TBR and academic performance, thereby providing novel targets for pharmacopuncture treatments to improve cognitive performance. Methods: Ten healthy male volunteers were subjected to 5-10 min of qEEG measurements under eyes-closed conditions. The qEEG measurements were performed 3 days before each of first two block examinations in anatomy-physiology, separated by five weeks. Amplitudes of the theta and beta waveforms, expressed in μV, were used to compute TBR, fTA and fBA. Significance of changes in theta and beta EEG wave amplitude was assessed by ANOVA with post-hoc t-testing. Correlations between TBR, fTA, fBA and the raw examination scores were evaluated by Pearson’s product-moment coefficients and linear regression analysis. Results: fTA and fBA were found to be negatively correlated with TBR (P<0.03, P<0.05, respectively) and were positively correlated with the second examination score (P<0.03, P=0.1, respectively). Conclusion: Smaller fTA and fBA were associated with lower academic performance in the second of two first-semester medical school anatomy-physiology block examination. Future studies should determine whether these qEEG metrics are useful for monitoring changes associated with the brain’s cognitive adaptations to academic challenges, for predicting academic performance and for targeting phamacopuncture treatments to improve cognitive performance.
Separation of CsCl from LiCl-CsCl Molten Salt by Cold Finger Melt Crystallization
JOSHUA R. VERSEY,SUPATHORN PHONGIKAROON,Michael F. Simpson 한국원자력학회 2014 Nuclear Engineering and Technology Vol.46 No.3
This study provides a fundamental understanding of a cold finger melt crystallization technique by exploring the heat andmass transfer processes of cold finger separation. A series of experiments were performed using a simplified LiCl-CsClsystem by varying initial CsCl concentrations (1, 3, 5, and 7.5 wt%), cold finger cooling rates (7.4, 9.8, 12.3, and 14.9 L/min),and separation times (5, 10, 15, and 30 min). Results showed a potential recycling rate of 0.36 g/min with a purity of 0.33wt% CsCl in LiCl. A CsCl concentrated drip formation was found to decrease crystal purity especially for smaller crystalformations. Dimensionless heat and mass transfer correlations showed that separation production is primarily influenced byconvective transfer controlled by cooling gas flow rate, where correlations are more accurate for slower cooling gas flow rates
Gorantla, Vasavi R.,Bond, Vernon Jr.,Dorsey, James,Tedesco, Sarah,Kaur, Tanisha,Simpson, Matthew,Pemminati, Sudhakar,Millis, Richard M. KOREAN PHARMACOPUNCTURE INSTITUTE 2019 Journal of pharmacopuncture Vol.22 No.3
Objectives: Attentional and memory functions are important aspects of neural plasticity that, theoretically, should be amenable to pharmacopuncture treatments. A previous study from our laboratory suggested that quantitative electroencephalographic (qEEG) measurements of theta/beta ratio (TBR), an index of attentional control, may be indicative of academic performance in a first-semester medical school course. The present study expands our prior report by extracting and analyzing data on frontal theta and beta asymmetries. We test the hypothesis that the amount of frontal theta and beta asymmetries (fTA, fBA), are correlated with TBR and academic performance, thereby providing novel targets for pharmacopuncture treatments to improve cognitive performance. Methods: Ten healthy male volunteers were subjected to 5-10 min of qEEG measurements under eyes-closed conditions. The qEEG measurements were performed 3 days before each of first two block examinations in anatomy-physiology, separated by five weeks. Amplitudes of the theta and beta waveforms, expressed in ${\mu}V$, were used to compute TBR, fTA and fBA. Significance of changes in theta and beta EEG wave amplitude was assessed by ANOVA with post-hoc t-testing. Correlations between TBR, fTA, fBA and the raw examination scores were evaluated by Pearson's product-moment coefficients and linear regression analysis. Results: fTA and fBA were found to be negatively correlated with TBR (P<0.03, P<0.05, respectively) and were positively correlated with the second examination score (P<0.03, P=0.1, respectively). Conclusion: Smaller fTA and fBA were associated with lower academic performance in the second of two first-semester medical school anatomy-physiology block examination. Future studies should determine whether these qEEG metrics are useful for monitoring changes associated with the brain's cognitive adaptations to academic challenges, for predicting academic performance and for targeting phamacopuncture treatments to improve cognitive performance.
P.V.R. Kumarasiri,S.N. Arseculeratne,P.D. Premasiri,B. Simpson EWHA INSTITUTE FOR BIOMEDICAL LAW & ETHICS 2008 BIOMEDICAL LAW & ETHICS Vol.2 No.2
The achievements of contemporary biomedicine and biotechnology are now widely communicated across the globe. Yet, across different cultures and belief systems, the relationship between the possible and the acceptable when it comes to biomedical advance is highly variable and draws justification from a wide range of sources: culture, religion, 'common sense', family values, ideas of what is 'natural', ideas of what is progress etc. Students' attitudes towards science and by extension toward the new biotechnologies have been extensively researched western contexts. However, relatively little is known about how this relationship plays out in different cultural contexts and there is even less by way of empirical research in this area. In this paper, we are interested in two related questions, the answers to which, we hope will begin to fill these gaps. First, we consider how culture and religion feed into bioethical deliberation among an emerging generation of 'bioethical citizens' drawn from Sri Lanka; the contrast that we go on to make with students from the UK is both illuminating and instructive. Second, we consider the points of bioethical conver-gence and divergence between the two groups. We conclude by offering some observations about what we have coine centres of ethical gravity' and what these might tell us about cultural relativism and the operation of bioethical sensibilities in different cultural contexts.
Simulated real-time process monitoring of a molten salt electrorefiner
Rappleye, D.,Simpson, M.,Cumberland, R.,McNelis, D.,Yim, M.S. North-Holland Pub. Co 2014 Nuclear engineering and design Vol.273 No.-
An alternative approach to monitoring the pyrochemical process (pyroprocessing) for spent nuclear fuel treatment is proposed and examined. This approach relies on modeling and the real-time analysis of process readings. Using an electrorefiner model, named ERAD, cathode potential and cell current were identified as useful process readings. To provide a real-time analysis of these two process readings, an inverse model was developed based on fundamental electrochemical relations. The model was applied to the following operating modes: pure uranium deposition, co-deposition of uranium and plutonium, and co-deposition of uranium and zirconium. Using the cell current and cathode potential, the model predicted which species were depositing and their rates. The deposition rates predicted by the inverse model compared favorably to those calculated by ERAD.