669 research outputs found

    Computational Thinking Bins: Outreach and More

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    Computational Thinking Bins are stand alone, individual boxes, each containing an activity for groups of students that teaches a computing concept. We have a devised a system that has allowed us to create an initial set, test the set, continually improve and add to our set. We currently use these bins in outreach events for middle and high school students. As we have shared this resource with K-12 teachers, many have expressed an interest in acquiring their own set. In this paper we will share our experience throughout the process, introduce the bins, and explain how you can create your own set

    A Reference Grammar of Bena

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    This dissertation is a grammar of Rena (ISO bez), a Bantu language spoken in southwestern Tanzania by approximately 600,000 people. Bena is largely undocumented, and though aspects of Bena grammar have been described, there is no usable, detailed treatment of the Bena language. Therefore the goal of this dissertation is provide the first detailed description of Bena that discusses phonology, morphology, and syntax. The analysis described in this grammar is based on data collected in the Njombe district of Tanzania during 2008 and 2009. Data throughout the grammar is taken from both elicitation and a corpus of 23 narratives. Though Bena is spoken by over half a million people, it is threatened by Swahili (the national language of Tanzania). Swahili's prominence in Tanzania has increased drastically since independence in 1961, and many (if not most) of the approximately 120 languages spoken in Tanzania are threatened by Swahili. Bena is no exception to this. The results of a sociolinguistic survey conducted in 2009 indicate that Swahili is having a significant impact on the Bena language. Therefore the writing of this dissertation comes at a crucial time. It provides a record of Bena at a time before too many features of the language are lost due to language contact. The first chapter provides an introduction to the Bena language and people. It also discusses results from the 2009 sociolinguistic survey which had the goal of clarifying questions on both the dialectal situation and the sociolinguistic vitality of Bena. The second chapter is devoted to phonetics and phonology. Of particular interest in this chapter are Bena's "predictable" tone system and the morphophonological process of imbrication (a type of coalescence in which multiple morphemes are interwoven together). The third chapter gives an overview of Bena word classes and provides a road map of the next several chapters of the grammar. Fourth is a description of Bena nominal morphology and other elements in the noun phrase. Like other Bantu languages, Bena uses a complex noun class system; Bena's 19 noun classes and the ways in which they are used are discussed in detail in this chapter. Following this is a description of Bena verbal morphology. Of particular interest in Bena is its tense aspect system--Bena distinguishes four separate past tenses and three distinct futures; these interact with five aspects. The second major focus of Chapter 5 is the use of a series of suffixes in verbal derivation. The sixth chapter of the grammar describes adverbs and other invariable words in Bena. Chapter 7 describes major aspects of Bena syntax. Because Bantu languages have rich morphological systems, most grammars of Bantu languages either give a fairly cursory treatment of syntax or they ignore it completely. This dissertation aims to fill that gap by providing a description of a Bantu language that is more balanced and acknowledges the significant roles played by both morphology and syntax. The final chapter highlights several features of Bena from a typological perspective and discusses areas in which further research on Bena has the potential to contribute significantly to Bantu linguistics

    Acceptance and Commitment Therapy for the treatment of posttraumatic stress among adolescents

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    The number of individuals who meet diagnostic criteria for posttraumatic stress disorder (PTSD) is a small percentage of those exposed to trauma; many youth who do not meet criteria for PTSD continue to experience problematic posttraumatic stress (PTS) symptomology. Acceptance and commitment therapy (ACT) has shown preliminary effectiveness in the treatment of adult PTSD, but its effectiveness in treating PTS in youth is unknown. Using a multiple-baseline design, this study investigated the effectiveness of 10-weeks of ACT to treat PTS in youth. Four adolescents from a community sample and three adolescents from a residential sample participated. The Clinician Administered PTSD Scale for Children and Adolescents, Child PTSD Symptom Scale, and Comprehensive Quality of Life Scale were completed at pretreatment, posttreatement, and 3- month follow-up. Individuals reported baseline data for 7 to 66 days. Symptom and process measures were completed at each session. Results revealed a decrease in PTS symptomology across both samples with mean reductions in self-reported PTS symptomology at posttreatment of 69% and 81% for the community and residential samples, respectively, and an overall 68% and 84% respective reduction at follow-up. Reductions in clinician rated measures of PTSD were observed for all participants with mean reductions of 57% and 61% in the community and residential samples at posttreatment, and 71% and 60% at follow-up, respectively. Results provide preliminary support for ACT as a treatment for adolescent PTS. Empirical and clinical implications as well as limitations and future directions are discussed. Key Words: Acceptance and Commitment Therapy; Posttraumatic Stress; PTSD; Treatmen

    Mortality and basal area growth following precommercial thinning in stands affected by Armillaria, Laminated and Tomentosus root diseases in southern British Columbia

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    Precommercial thinning aims to reduce the density of immature stands to stimulate growth of well-spaced crop trees of preferred species and free from defects and disease. The chronic persistence of Armillaria, Laminated and Tomentosus root diseases in coniferous forests of British Columbia, Canada may offset potential gains in timber yield of commercially important tree species by creating stumps that the fungi utilize as an energy source to infect neighbouring trees. In juvenile plantations and naturally regenerated stands in six biogeoclimatic (BEC) zones with evidence of root disease caused by Armillaria ostoyae (8 sites), Coniferiporia sulphurascens (2 sites) or Onnia tomentosa (1 site), five of ten 20 m square plots per site were randomly selected for thinning to British Columbia Ministry of Forests specifications. Crop tree diameter at breast height and mortality from all causes were recorded at establishment and periodically thereafter up to 19 years post-thinning. Logistic regression analysis of mortality rates showed significant differences among root disease pathogens, between planted and natural stands, and among ecological zones. Yet over all sites, differences between thinned and control plots were not significant. At the final assessment, crop tree basal area was higher in thinned than in control plots at 10 of 11 sites. Root disease, including infected and dead trees and other lethal biotic and abiotic agents, reduced potential yield in both treatments (thinned and control). At several Armillaria sites, mortality was slightly to substantially higher in thinned than in control plots, suggesting that thinning can increase the amount and potential of inoculum which may continue to adversely impact productivity of those stands. Recommendations for silvicultural management of the three root diseases are discussed

    Damage Detection in a Microencapsulated Dicyclopentadiene and Grubbs’ Catalyst Self-Healing System

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    Self-healing polymers are able to repair themselves after being damaged. Microcapsules were prepared to contain both a healing agent, dicyclopentadiene (DCPD), in addition to a damage detection agent, 1,3,5,7-Cyclooctatriene (COT). The DCPD-COT microcapsules were ruptured in the presence of Grubbs’ catalyst, and color change was confirmed. Modified compact tension specimens were produced that contained DCPD and DCPD-COT microcapsules. Voids within the polymers prevented the specimens from healing, so the effect of COT on the healing efficiency could not be tested

    A Study of Parkland Student Social Life

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    This slide presentation is the result of an ethnography assignment for Anthropology 103. The group conducted two random surveys and several in-person interviews and found that the majority of students questioned participate in student activities sometime or often, but that only a very small percentage reported making good friends at Parkland. Other findings indicated that over half the students surveyed were actively seeking friendships, but only about one third were actively involved in clubs. All surveyed indicated that technology has impacted how we socialize

    Prospectus, February 13, 2020

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    THE SCIENCE OF LOVE; Love is in the air; Perimeter Road to host second annual music festival this May; Letter to the editor; Jacarra Lee receives Outstanding Black Student Award; Study abroad deadlines quickly approaching; Black History Month figure; Arthur Ashe; Support soars for Illini Basketballhttps://spark.parkland.edu/prospectus_2020/1003/thumbnail.jp

    Prospectus, January 23, 2020

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    GOUGH NAMED HEAD COACH, Clean Energy Act Proposed, Why the Tension Between Iran and US?, Faculty Spare Time for Bowling, Meet the Staff: Scott Landells, Black Queens Rock Event Feb. 3, Parkland Basketball Crushes Malcom Xhttps://spark.parkland.edu/prospectus_2020/1000/thumbnail.jp
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