Death of a Dream Service-Learning: 1994-2010: A Historical Analysis by One of the Dreamers

This essay was written in 1994 to stimulate discussion about issues that I felt threatened the efforts of the service-learning community to effectively expand with high-quality programs. It was based on my observations as a person involved in providing professional development support to teachers and education professors. — Don Hill, October 200

Navigating the Shoals of Civic Education With Service-Learning: Ethical, Moral, and Political Constraints on Transformative Education

American democracy is threatened by an accelerating trend of disengagement from the fundamental responsibilities of citizenship.This disengagement is growing in all segments of society but is most pronounced in youth and young adults which makes it even more troubling. Many thoughtful educators argue persuasively that high quality service-learning can and should become a resource for tackling this problem, that it can stimulate youth to become active democratic citizens.They are, in my judgment, correct, but navigating the shoals of civic education with service-learning is difficult

Temporal Influence on Awareness

Grossberg\u27s Motion Oriented Contrast Filter (MOC) was extensively analyzed (7). The output from the filter\u27s global motion neuronal layer was compared to a noncausal post-processing filter developed by AFIT. Both filters were shown to incorporate a weighted, noncausal temporal range of input data in processed output. The global motion framework was then implemented using a physiologically motivated pulsed neural model - the Pulse Coupled Neural Network (PCNN). By incorporating both spatial and temporal data, the PCNN was shown to exhibit a common visual illusion, apparent motion. The existence of a physiological temporal processing range was further investigated through implementation of two multi-modal experiments which integrated visual and auditory stimulus input channels. Results from the first experiment reinforce earlier findings from literature of a temporal window for perception of simultaneous activity. (Events occurring within this window are considered simultaneous; events which span more than one window are considered temporally separate.) Data collected from the second experiment suggests future inputs from an accessory auditory stimulus impact current perception of a visual stimulus. The influence of the auditory accessory stimulus decreases as the temporal delay between visual and auditory stimulus presentation is increased up to a maximum value of approximately 40 milliseconds. These tests results suggest the existence of perceptual noncausality in the mind - awareness as a function of past, current, and future perceptual inputs

Principles of Good Practice for Service-Learning in Preservice Teacher Education

The purpose of this document is to provide principles to guide the integration of service-learning into the preservice teacher education curriculum. The ten principles included here were developed by a group of over 80 teacher educators and service-learning practitioners from all regions of the U.S. who contributed their ideas and feedback in order to achieve consensus. (Contributors are listed in Appendix B). These principles of good practice can be used by teacher educators to design and assess their service-teaming activities, and by policy makers to guide decisions regarding resource allocation and program development

A note on the earth-stretching approximation for Love waves

Earth-flattening transformations provide an efficient means for computing Love-wave dispersion and torsional normal mode frequencies in radially heterogeneous, spherically symmetric earth models. These transformations involve simple algebraic sealing factors applied to solutions for SH waves in a layered half-space. They result in considerable computational savings over solutions expressed directly in spherical geometry. Several earth-flattening transformations for SH waves are described in the literature (Anderson and Toksöz, 1973; Sato, 1968; Biswas and Knopoff, 1970). Chapman (1973) has examined the general class of power-law earth-flattening transformations and their application to body-wave problems

Ground Water Monitoring Project for Arkansas, Phase III

This report is composed of two parts. The first part is an interpretation of the pesticide and nitrate data collected in Woodruff County based on samples collected during 1994. Because there is an indication that there were hydrological differences between 1994 and 1995, and because most of the pesticide data is from 1994, this interpretive portion is restricted to 1994 data. Six wells initially sampled in 1994 that contained pesticides had continuing contamination in re-sampling in 1994 and 1995. Part II lists a seventh well in Woodruff County that contained pesticides in February and May of 199

Detrital zircon geochronology of Paleoproterozoic sedimentary rocks from the upper Huronian Supergroup, Canada

The Huronian Supergroup is a well-known succession of primarily sedimentary rocks exposed north of Lake Huron. Deposition of the succession is constrained between 2450 and 2220 Ma (million years), which corresponds with Earth’s rise of atmospheric oxygen, however the depositional timing of the uppermost formations cannot be refined further due to a lack of interbedded volcanic rocks. A geochronological study of detrital zircon grains from sandstone and claystone beds from the two youngest Huronian formations, the Gordon Lake and Bar River formations, was completed in order to confine the maximum age of deposition. Zircon is a mineral that commonly forms in trace amounts in felsic igneous rocks and records the age of lava or magma crystallization. Over time, weathering of the parent rock leads to erosion of zircon grains, which frequently become incorporated into sedimentary deposits. Detrital zircons can therefore provide a maximum depositional age for sedimentary rocks. Uranium-lead age data was collected using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Data from the youngest zircon grains indicate that deposition occurred sometime after 2315 ± 5 Ma, but prior to emplacement of igneous intrusions approximately 95 million years later. These results are consistent with reported U-Pb zircon ages from purported tuff beds in the Gordon Lake Formation, however our results support a detrital origin of the zircon grains, as opposed to a period of volcanic activity. Determining the depositional age of sedimentary successions is critical for reconstructing ancient environments and provides important information on the tectonic processes operating at the time of deposition

A case-control study to investigate the prevalence of obstructive sleep apnea and the utility of the PSQ-SRBD questionnaire in children and young people with epilepsy

Study Objectives: Epilepsy and obstructive sleep apnea syndrome (OSAS) are each relatively common in children. OSAS may affect cognition, such that recognition of OSAS is important for children and young people with epilepsy (CYPWE). Published pilot data reported 55% of CYPWE had symptoms suggestive of OSAS, compared with 7% of typically developing controls. The primary aim of this study was to ascertain OSAS prevalence by polysomnography in CYPWE, with secondary aims being to evaluate the utility of sleep questionnaires in CYPWE. Methods: CYPWE and age- and sex-matched typically developing controls were studied. A single night of level I attended polysomnography was undertaken, along with questionnaires (Sleep-Related Breathing Disorder scale of the Pediatric Sleep Questionnaire, Pittsburgh Sleep Quality Index, and the childhood and adolescent Epworth Sleepiness Scale). OSAS was defined as obstructive apnea-hypopnea index of ≥ 1 event/h. Results: Polysomnography was performed in 72 children including 48 CYPWE (60% male) and 24 controls (54% male). Mean age (11 years) was similar for CYPWE and controls (P = .42), with slightly higher body mass index z scores (0.7 vs 0.1, P = .03) noted in CYPWE. Mean obstructive apnea-hypopnea index was 0.61 in CYPWE vs 0.42 in controls (P = .62). Despite higher Sleep-Related Breathing Disorder scale of the Pediatric Sleep Questionnaire scores in CYPWE (0.38 vs 0.12, P &lt; .001), no difference in OSAS prevalence (10% vs 4%, P = .78) was found. CYPWE had higher childhood and adolescent Epworth Sleepiness Scale (6 vs 3.5, P = .01) and Pittsburgh Sleep Quality Index (5 vs 3.3, P = .02) scores, indicating greater levels of daytime sleepiness and poorer sleep quality. Conclusions: The study found no evidence for increased OSAS prevalence in CYPWE, and the utility of the Sleep-Related Breathing Disorder scale of the Pediatric Sleep Questionnaire in predicting OSAS appears limited for CYPWE. CYPWE are, however, demonstrably sleepier and have poorer sleep quality. The cause for these findings remains unclear. Clinical Trial Registration: Registry: ClinicalTrials.gov; Name: Investigation of Sleep Quality and Prevalence of Sleep-disordered Breathing in Children and Young People With Epilepsy; URL: https://www.clinicaltrials.gov/study/NCT03103841; Identifier: NCT03103841.</p

Confirmatory Factor Analysis of WAIS-IV in a Clinical Sample: Examining a Bi-Factor Model

There have been a number of studies that have examined the factor structure of the Wechsler Adult Intelligence Scale IV (WAIS-IV) using the standardization sample. In this study, we investigate its factor structure on a clinical neuropsychology sample of mixed aetiology. Correlated factor, higher-order and bi-factor models are all tested. Overall, the results suggest that the WAIS-IV will be suitable for use with this population