On the Dynamics and Acoustics of Cloud Cavitation on an Oscillating Hydrofoil

Observations have been made of the growth and collapse of surface and cloud cavitation on a finite aspect ratio hydrofoil oscillating in pitch. The cavitation was recorded using both still and high-speed motion picture photography, and the variations with cavitation number and reduced frequency of oscillation were investigated. The noise generated by the cavity collapse was also measured and analyzed. The acoustic signals associated with individual cavity collapse events have been synchronized with the motion pictures, providing insights into the correspondence between the flow structures involved in the cavity collapse process and the sound generated by them

Teachers enacting a technology-rich curriculum for emergent literacy

PictoPal is the name of a technology-rich curriculum with a focus on emergent literacy of Dutch kindergarteners. A case study design was used to examine teacher technology integration within PictoPal along with their perceptions about teaching/learning, technology and technology-based innovations. Observations were undertaken on pupils’ engagement and teachers’ technology integration within PictoPal. Interviews were used to examine teachers’ perceptions. Pupils’ emergent literacy learning was examined in a nonequivalent control quasi experimental design. Four kindergarten teachers and four classes (N = 95 pupils) participated in the use of PictoPal. The findings suggest that a high extent of technology integration is related to: a developmental approach to teaching/learning; positive attitudes and expectations towards technology-based innovations; and positive perceptions of support in stressful work conditions. Significant learning gains were found for the experimental group using PictoPal. High pupil learning gains were not related to a high extent of technology integration. Senior kindergarteners engaged to a higher extent with PictoPal than junior kindergartener

Kinetics of Competing Reactions of N-aryl-4-chloro-1,8-naphthalimides with Primary Amines

Color poster with text, diagrams, tables, and graphs.This study presented the mechanistic implications of the kinetics of competing reactions of N-aryl-4-chloro-1,8-naphthalimides with primary amines.University of Wisconsin--Eau Claire Office of Research and Sponsored Programs; Petroleum Research Fund

Microtubules gate tau condensation to spatially regulate microtubule functions.

Tau is an abundant microtubule-associated protein in neurons. Tau aggregation into insoluble fibrils is a hallmark of Alzheimer's disease and other types of dementia1, yet the physiological state of tau molecules within cells remains unclear. Using single-molecule imaging, we directly observe that the microtubule lattice regulates reversible tau self-association, leading to localized, dynamic condensation of tau molecules on the microtubule surface. Tau condensates form selectively permissible barriers, spatially regulating the activity of microtubule-severing enzymes and the movement of molecular motors through their boundaries. We propose that reversible self-association of tau molecules, gated by the microtubule lattice, is an important mechanism of the biological functions of tau, and that oligomerization of tau is a common property shared between the physiological and disease-associated forms of the molecule

Second and foreign language teachers’ problem-solving schemata development through informal problem-solving:the relationship between experience and expertise

Purpose: Second and foreign language (SL/FL) teachers’ informal problem-solving has received little explicit research attention while it is widely acknowledged that problem-solving is crucial to expertise development in any complex knowledge domain. To develop a clearer understanding of the role of informal problem-solving in SL/FL teachers’ expertise development, this study investigated how experience (i.e. time on the job) affects the level of problem-solving schemata development. Design/methodology/approach: This situational analysis of teaching practices was conducted with 15 SL/FL teachers divided into three experience groups. Through qualitative coding of verbal reflections on teachers’ own lessons, the structural components of problem-solving schemata development were explored at two levels. The first or basic level represents the broader knowledge base which problem-solving utilizes in understanding and recognizing classroom situations. The second is the expert-level problem-solving knowledge level. Qualitative codes were quantified to enable descriptive statistics and t-tests for the analysis regarding the basic level. A descriptive analysis was performed to uncover expert-level knowledge. Findings and Originality/value: The results show that experience affects problem-solving schemata development in qualitatively different ways at different levels. At the first or basic level, most teachers develop extensive and numerous domain-specific problem-solving schemata with experience. Few experienced teachers develop expert-level schemata. At this level, experience mostly affects the type of domain-specific knowledge and quality of feedback on effective strategies incorporated in these schemata. The findings suggest that future studies need to adopt a multi-level analysis of problem-solving schemata development.</p

Walk A Hound, Lose A Pound, & Stay Fit for Seniors

Comparative Medicine - OneHealth and Comparative Medicine Poster SessionBackground: Obesity rates in older adults are linked with the national problem of limited physical activity (PA), resulting in chronic illness. Obesity-related illness and functional loss require innovative interventions. Older adult dog walkers maintained physical functioning over a 3 year period (Thorpe 2006). Dog walking may improve long-term PA by improving readiness and physical function. Purpose: The study aimed to test the association between dog walking and physical functioning. Methods: A three-group, repeated measures design tested efficacy of a 12-week (5 days/week) shelter dog walking program for community-dwelling adults over age 65. Three retirement facilities were assigned to the shelter dog walking (DW), human walking companion (HWC), or no-treatment control (C) group. DW group members selected a dog matching their walking capability & walked on a paved road at the animal shelter. HWC group members walked with a friend or spouse on a paved road at their residence. Both groups were accompanied by study staff. Pretest, mid-trial & posttest findings included 6-minute walk, weight, physical activity during the previous week, physical activity stage of change, mood & social support. Findings: Fifty-four adults participated {DW n=12, HWC n=23 & C n=19}. Fourteen males & 40 females, ranged in age from 67-97 years (Mean=85). The 6-minute walk compared pre and post for the DW group increased 28% (p=0.012), the HWC had a 4% increase (p=0.32) and the C group a 6% increase (p=0.18). Conclusions: DW group participants expressed affinity for the shelter dogs. The DW group's walking ability improved significantly. They stated that their balance & walking confidence improved. They stated that they liked the program because it “gets me out,” “is helping me to feel more confident,” & “is fun.” Dog walking may be beneficial to improve or maintain functioning in older adults. Walking speed is an important indicator of balance