Donat-Pierre Luigi

The formation of stable surface methoxy groups in various zeolite-catalysed reaction processes has been widely accepted as an important intermediate stage and the understanding of such an intermediacy is of great significance. 13C magic-angle-turning (MAT) NMR experiments, in conjunction with theoretical calculations of 13C shielding tensors, are employed to investigate the chemical and electronic nature of methoxy groups on H-SAPO-34.

Second-order quadrupolar broadening has rendered the study of cation sites in microporous materials almost impossible until the recent advent of the 2D multiple-quantum NMR experiment. In conjunction with computer lattice-energy-minimisation calculations we ...

Virtual environments (VEs) should be able to provide experiences as rich and complex as those to be had in real life. While this seems obvious, it is not yet possible to create a perfect simulacrum of the real world, so such correspondence requires the development of design techniques by which VEs can be made to appear more real. It also requires evaluation studies to determine if such techniques produce the desired results. As emotions are implicated in our phenomenological understanding of the physical world, they should also play an integral role in the experience of the virtual one. Therefore, a logical sequence of experimentation to understand how VEs can be made to function as emotion-induction systems is in order. The Sensory Environments Evaluation (SEE) research program has developed a twofold design process to explore if we react to virtually supplied stimuli as we do to the real world equivalents. We look at manipulating both the sensory and emotional aspects of not only ...

Virtual reality (VR) has become mature enough to be successfully used in clinical applications such as exposure therapy, pain distraction, and neuropsychological assessment. However, we now need to go beyond the outcome data from this research and conduct the detailed scientific investigations required to better understand what factors influence why VR works (or doesn’t) in these types of clinical applications. This knowledge is required to guide the development of VR applications in the key areas of education, training, and rehabilitation and to further evolve existing VR approaches. One of the primary assets obtained with the use of VR is the ability to simulate the complexity of real world environments, within which human performance can be tested and trained. But this asset comes with a price in terms of the capture, quantification and analysis of large, multivariate and concurrent data sources that reflect the naturalistic behavioral interaction that is afforded in a virtual wo...

Our project used a virtual environment called DarkCon to simulate a military reconnaissance mission. In this study, we investigated the differential effects of priming on a group of 64 civilians. Half were given a military-style, and half a game-style instructional video and briefing. We tested subjects for simulatorsickness, immersive tendencies, self-reported degree of presence, and recall of scenario elements. Psychophysiological data (skinconductance response and heartrate) was also recorded for each subject. We hypothesized that the priming condition would result in different behaviour within the virtual environment, differences in physiological response, and possibly differences within subjects' recall of their experience. Implications of our findings and directions for future research are discussed. CR Categories J4.1 Computer Applications Psychology I.6.6 Simulation Output Analysis Additional

Virtual environments (VEs) should be able to provide experiences as rich and complex as those to be had in real life. While this seems obvious, it is not yet possible to create a perfect simulacrum of the real world, so such correspondence requires the development of design techniques by which VEs can be made to appear more real. It also requires evaluation studies to determine if such techniques produce the desired results. As emotions are implicated in our phenomenological understanding of the physical world, they should also play an integral role in the experience of the virtual one. Therefore, a logical sequence of experimentation to understand how VEs can be made to function as emotion-induction systems is in order. The Sensory Environments Evaluation (SEE) research program has developed a twofold design process to explore if we react to virtually supplied stimuli as we do to the real world equivalents. We look at manipulating both the sensory and emotional aspects of not only ...

: Virtual environments (VEs) should be able to provide experiences as rich and complex as those to be had in real life. While this seems obvious, it is not yet possible to create a perfect simulacrum of the real world, so such correspondence requires the development of design techniques by which VEs can be made to appear more real. It also requires evaluation studies to determine if such techniques produce the desired results. As emotions are implicated in our phenomenological understanding of the physical world, they should also play an integral role in the experience of the virtual one. Therefore, a logical sequence of experimentation to understand how VEs can be made to function as emotion-induction systems is in order. The Sensory Environments Evaluation (SEE) research program has developed a twofold design process to explore if we react to virtually supplied stimuli as we do to the real world equivalents. We look at manipulating both the sensory and emotional aspects of not onl...

Our project used a virtual environment called DarkCon to simulate a military reconnaissance mission. In this study, we investigated the differential effects of priming on a group of 34 Army Ranger “recycles” from Fort Benning, GA. Half were given a military-style, and half a game-style instructional video and briefing. We tested subjects for simulatorsickness, immersive tendencies, self-reported degree of presence, and recall of scenario elements. We hypothesized that the priming condition would result in different behavior within the virtual environment, and possibly differences within subjects' recall of their experience. We also examined the effects of subjects' prior game play experience and habits on their behavior. Implications of our findings and directions for future research are discussed. CR Categories: J.4.2 [Computer Applications]: Social and Behavioral Sciences-Psychology; I.6.6 [Computing Methodologies]: Simulation and Modeling-Simulation Output Analysis.

Publisher Summary This chapter presents a theoretical investigation of the chemical shift anisotropy of toluene adsorbed on zeolite X. Adsorption of toluene on zeolites lithium (Li)-X, sodium (Na)-X, potassium (K)-X, rubidium (Rb)-X, and cesium (Cs)-X has been investigated with quantum chemical methods. Calculations of geometries, Mulliken partial charges, and 13 C chemical shift parameters of clusters representing the catalytically active site are presented. The polarization of the toluene carbons is the first step in alkylation reactions catalyzed by zeolites and, at an early stage, will influence the outcome of the reaction. The simultaneous influence of the Lewis acidic cation and the basicity of the zeolite are responsible for altering the electron distribution within the toluene and thus, affecting the outcome of an alkylation reaction.

Second-order quadrupolar broadening has rendered the study of cation sites in microporous materials almost impossible until the recent advent of the 2D multiple-quantum NMR experiment. In conjunction with computer lattice-energy-minimisation calculations we ...

Second-order quadrupolar broadening has rendered the study of cation sites in microporous materials almost impossible until the recent advent of the 2D multiple-quantum NMR experiment. In conjunction with computer lattice-energy-minimisation calculations we ...