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Title
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Modeling risk for intranasal, inhalation, and corneal exposures to opportunistic pathogens of concern in drinking water
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Creator
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Dean, Kara
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Date
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2019
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Collection
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Electronic Theses & Dissertations
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Description
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"This study developed dose response models for determining the probability of eye, respiratory or central nervous system infections from previously conducted studies using Naegleria fowleri, Acanthamoeba spp. and Pseudomonas aeruginosa. These opportunistic pathogens have been identified in drinking water and premise plumbing systems, and a lack of dose response models for the appropriate exposure routes of concern has prevented researchers from quantifying the risk they pose to human health....
Show more"This study developed dose response models for determining the probability of eye, respiratory or central nervous system infections from previously conducted studies using Naegleria fowleri, Acanthamoeba spp. and Pseudomonas aeruginosa. These opportunistic pathogens have been identified in drinking water and premise plumbing systems, and a lack of dose response models for the appropriate exposure routes of concern has prevented researchers from quantifying the risk they pose to human health. Using the newly developed dose response model for P. aeruginosa, a reverse quantitative microbial risk assessment (QMRA) was completed to determine the threshold concentrations of P. aeruginosa associated with an annual risk of 10-4 for corneal and inhalation exposures. The results indicated that an average concentration of 1 CFU/L in the bulk water could result in an annual risk greater than the guideline set by the Environmental Protection Agency. The threshold concentration responsible for a 10 -4 risk of pneumonia from P. aeruginosa was 11 orders of magnitude greater than the threshold concentration for bacterial keratitis. Modeling all possible exposure routes of concern for opportunistic pathogens in drinking water is critical, as the exposure route dramatically affects the concentrations of concern. This reverse QMRA and future risk assessments that utilize the dose response models developed in this study can be used to inform decisions on drinking water treatment, monitoring protocols, and future plumbing design."--Page ii.
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Title
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Teaching a selection response for no-access video-based preference assessments to children with autsim
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Creator
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Mitchell, Emma (Graduate of Michigan State University)
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Date
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2019
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Collection
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Electronic Theses & Dissertations
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Description
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"This study examined the prerequisite skills necessary to conduct a no-access video-based preference assessment for two children with Autism Spectrum Disorder (ASD) who did not demonstrate a selection response during a video-based preference assessment. A brief Multiple Stimulus Without Replacement (MSWO) of videos of toys was used to teach a selection response by systematically fading the participants' access to toys during the preference assessment. Once the selection response was...
Show more"This study examined the prerequisite skills necessary to conduct a no-access video-based preference assessment for two children with Autism Spectrum Disorder (ASD) who did not demonstrate a selection response during a video-based preference assessment. A brief Multiple Stimulus Without Replacement (MSWO) of videos of toys was used to teach a selection response by systematically fading the participants' access to toys during the preference assessment. Once the selection response was successfully taught with the toys, it was assessed with videos of social interactions. A progressive ratio (PR) schedule and concurrent operant reinforcer assessment were then conducted to determine the reinforcing effectiveness of the highest and lowest preferred social interactions from a brief MSWO for each of the participants. The selection response was successfully taught to both participants and mixed results were found from both reinforcer assessments for both participants."--Page ii.
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Title
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Toward the detection of landscape features : clustering 3D points using spatial and thematic characteristics
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Creator
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Romero, Boleslo Edward
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Date
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2010
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Collection
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Electronic Theses & Dissertations
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Description
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ABSTRACTTOWARD THE DETECTION OF LANDSCAPE FEATURES:CLUSTERING 3D POINTS USING SPATIAL AND THEMATIC CHARACTERISTICSByBoleslo Edward RomeroThe study of Geography generally concerns phenomena at or near the surface of the earth. High resolutions of 3D quantitative and qualitative data can represent such phenomena as objects or fields. The data can be grouped to reveal representations of contiguous regions of spatial and thematic homogeneity. My thesis is concerned with finding groups of 3D...
Show moreABSTRACTTOWARD THE DETECTION OF LANDSCAPE FEATURES:CLUSTERING 3D POINTS USING SPATIAL AND THEMATIC CHARACTERISTICSByBoleslo Edward RomeroThe study of Geography generally concerns phenomena at or near the surface of the earth. High resolutions of 3D quantitative and qualitative data can represent such phenomena as objects or fields. The data can be grouped to reveal representations of contiguous regions of spatial and thematic homogeneity. My thesis is concerned with finding groups of 3D points with similar locations, spatial relationships, and thematic values of spectral reflectance. To accomplish this successfully, I synthesized elements of two geographic theories: point aggregation from cartographic generalization and hierarchical geographic ontology. My experimental design used synthetic 3D point data with spectral values. I employed the multi-dimensional Mean Shift clustering technique from the discipline of Computer Vision, and adapted a 3D range image segmentation accuracy assessment technique. I also contributed new techniques for segmentation quality assessment including two area under the curve indices and the development of new segmentation surface plots. Experimental evaluations included comparisons of the Mean Shift results with K-means clustering results, spatial resolution results, noise evaluation results, and the results of an alternative color configuration. I modified the variable sets to address uneven lighting conditions and employed the experimental methods to grouping real-world terrestrial LiDAR scan data. Though my new spatial relationship variable needs improvement, the methods yielded groups of points representing features in the LiDAR data and provided evidence of the potential for grouping richly attributed 3D points that represent geographic features.
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Title
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An evaluation of preference displacement in individuals with autism
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Creator
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Foote, Alexa
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Date
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2019
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Collection
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Electronic Theses & Dissertations
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Description
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"In this study we replicated the procedures of DeLeon, Iwata, and Roscoe's 1994 study which examined the extent of which edible stimuli displaced leisure stimuli in a preference assessment. Participants took part in three separate multiple stimulus without replacement (MSWO) preference assessments. One preference assessment contained all leisure stimuli, another all edible stimuli, and a final preference assessment that contained the top selected stimuli from the edible and leisure...
Show more"In this study we replicated the procedures of DeLeon, Iwata, and Roscoe's 1994 study which examined the extent of which edible stimuli displaced leisure stimuli in a preference assessment. Participants took part in three separate multiple stimulus without replacement (MSWO) preference assessments. One preference assessment contained all leisure stimuli, another all edible stimuli, and a final preference assessment that contained the top selected stimuli from the edible and leisure assessments. Their study found that 12 of the 14 participants selected edible stimuli over leisure stimuli in a combined preference assessment. Another recent study, Conine and Vollmer (2019) found similar results. However, our findings were different. Our results indicated that 11 participants selected edible stimuli as their most preferred stimulus and 14 selected leisure as their most preferred stimulus. This study also evaluated the effects of preference displacement in a combined preference assessment. The implication of our results suggest that preference is based on the individual and may be influenced by age, setting, and disability."--Page ii.
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