481 research outputs found

    How Does An Environmental Based Service-Learning Project In An Non-Science Classroom Affect Student’s Values And Motivate Them To Be Better Stewards?

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    This study addressed the question: how does an environmental based servicelearning project in an non-science classroom affect student\u27s values and motivate them to be better stewards? The participants of this study were tenth grade AVID students in a suburban high school setting. Quantitative and qualitative data was collected, analyzed and compared to accurately measure student’s attitudes towards the environment. The quantitative data was collected using the New Ecological Paradigm (NEP) Likert Scale Survey. The students were surveyed prior to their service-learning project and then again after the project\u27s completion. Qualitative data was obtained through one-on-one interviews and a short writing prompt. The results of the study indicate that a servicelearning project in a non-science classroom can slightly increase students’ environmental attitude. More research is needed to measure if this change in attitude will motivate longterm environmental action. The results of the study also support the use of servicelearning projects as a way to expose students to new issues, connect them to their community, and teach them new skills

    TREN Dissertations at Crown College

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    The Theological Research Exchange Network (TREN) provides a gold-mine of information for theological libraries but has previously made this information available primarily on microfiche format. Librarians and computer personnel at Crown College in Minnesota worked together with TREN to make this information available in full-text electronic format through the library online catalog. This article explains the process so other interested librarians can work with TREN to do the same

    Fatty Acid SNP Interaction Analysis in Angus Sired Beef Cattle

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    The triacylglyceride (TAG) fatty acid content in meat from Angus-sired cattle was analyzed for non-additive genetic effects. A total of 11,482 significant DNA marker interactions (false discovery rate [FDR] \u3c 0.05) were detected across thirty-seven different TAG fatty acids. Interactions were not evenly distributed amongst all fatty acids analyzed, and types of interactions (additive-by-additive, additive-by-dominance, and dominance-by-dominance) varied within each individual fatty acid. These results indicate that it may be possible to account for additional genetic variance amongst TAG fatty acids over and above individual markers

    Virtual Reality Therapy for Fall Prevention in Older Adults A Comparative Study to Conventional Exercise

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    Purpose The purpose of this critically appraised topic is to investigate if VR-HMD interventions have a superseding impact on older adults in preventing falls in comparison to conventional physical therapy balance exercises. Introduction Increases in technology, one of the newest being virtual reality, has positively impacted the world of rehabilitation. There are many different types of virtual reality systems that are used, but the most common is the Virtual Reality Head Mounted Display (VR-HMD). In the United States, 28% of adults aged 65 and older report falling each year. This is significant because falls are the leading cause of injury-related death among this population, and the age-adjusted fall death rate is increasing

    Evaluation of chloride stress corrosion susceptibility of stainless steels

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    Please click Additional Files below to see the full abstract

    Evaluating the impact of a year-long external mentorship pilot program in classical hematology

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    Effective mentorship is a pivotal factor in shaping the career trajectory of trainees interested in classical hematology (CH), which is of critical importance due to the anticipated decline in the CH workforce. However, there is a lack of mentorship opportunities within CH compared with medical oncology. To address this need, a year-long external mentorship program was implemented through the American Society of Hematology Medical Educators Institute. Thirty-five hematology/oncology fellows interested in CH and 34 academically productive faculty mentors from different institutions across North America were paired in a meticulous process that considered individual interests, experiences, and background. Pairs were expected to meet virtually once a month. Participation in a scholarly project was optional. A mixed-methods sequential explanatory design was used to evaluate the program using mentee and mentor surveys, a mentee interview, and a mentee focus group. Thirty-three mentee-mentor pairs (94.2%) completed the program. Sixty-three percent of mentee respondents worked on a scholarly project with their mentor; several mentees earned publications, grants, and awards. Mentee perception that their assigned mentor was a good match was associated with a perceived positive impact on confidence (P = .0423), career development (P = .0423), and professional identity (P = .0302). Furthermore, 23 mentees (66%) accepted CH faculty positions after fellowship. All mentor respondents believed that this program would increase retention in CH. This mentorship program demonstrates a productive, beneficial way of connecting mentees and mentors from different institutions to improve the careers of CH trainees, with the ultimate goal of increasing retention in CH

    Hydrogen Epoch of Reionization Array (HERA)

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    The Hydrogen Epoch of Reionization Array (HERA) is a staged experiment to measure 21 cm emission from the primordial intergalactic medium (IGM) throughout cosmic reionization (z=612z=6-12), and to explore earlier epochs of our Cosmic Dawn (z30z\sim30). During these epochs, early stars and black holes heated and ionized the IGM, introducing fluctuations in 21 cm emission. HERA is designed to characterize the evolution of the 21 cm power spectrum to constrain the timing and morphology of reionization, the properties of the first galaxies, the evolution of large-scale structure, and the early sources of heating. The full HERA instrument will be a 350-element interferometer in South Africa consisting of 14-m parabolic dishes observing from 50 to 250 MHz. Currently, 19 dishes have been deployed on site and the next 18 are under construction. HERA has been designated as an SKA Precursor instrument. In this paper, we summarize HERA's scientific context and provide forecasts for its key science results. After reviewing the current state of the art in foreground mitigation, we use the delay-spectrum technique to motivate high-level performance requirements for the HERA instrument. Next, we present the HERA instrument design, along with the subsystem specifications that ensure that HERA meets its performance requirements. Finally, we summarize the schedule and status of the project. We conclude by suggesting that, given the realities of foreground contamination, current-generation 21 cm instruments are approaching their sensitivity limits. HERA is designed to bring both the sensitivity and the precision to deliver its primary science on the basis of proven foreground filtering techniques, while developing new subtraction techniques to unlock new capabilities. The result will be a major step toward realizing the widely recognized scientific potential of 21 cm cosmology.Comment: 26 pages, 24 figures, 2 table

    Fine spatial pattern of an epiphytic lichen species is affected by habitat conditions in two forest types in the Iberian Mediterranean region

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    Persistence and abundance of species is determined by habitat availability and the ability to disperse and colonize habitats at contrasting spatial scales. Favourable habitat fragments are also heterogeneous in quality, providing differing opportunities for establishment and affecting the population dynamics of a species. Based on these principles, we suggest that the presence and abundance of epiphytes may reflect their dispersal ability, which is primarily determined by the spatial structure of host trees, but also by host quality. To our knowledge there has been no explicit test of the importance of host tree spatial pattern for epiphytes in Mediterranean forests. We hypothesized that performance and host occupancy in a favourable habitat depend on the spatial pattern of host trees, because this pattern affects the dispersal ability of each epiphyte and it also determines the availability of suitable sites for establishment. We tested this hypothesis using new point pattern analysis tools and generalized linear mixed models to investigate the spatial distribution and performance of the epiphytic lichen Lobaria pulmonaria, which inhabits two types of host trees (beeches and Iberian oaks). We tested the effects on L. pulmonaria distribution of tree size, spatial configuration, and host tree identity. We built a model including tree size, stand structure, and several neighbourhood predictors to understand the effect of host tree on L. pulmonaria. We also investigated the relative importance of spatial patterning on the presence and abundance of the species, independently of the host tree configuration. L. pulmonaria distribution was highly dependent on habitat quality for successful establishment, i.e., tree species identity, tree diameter, and several forest stand structure surrogates. For beech trees, tree diameter was the main factor influencing presence and cover of the lichen, although larger lichen-colonized trees were located close to focal trees, i.e., young trees. However, oak diameter was not an important factor, suggesting that bark roughness at all diameters favoured lichen establishment. Our results indicate that L. pulmonaria dispersal is not spatially restricted, but it is dependent on habitat quality. Furthermore, new spatial analysis tools suggested that L. pulmonaria cover exhibits a distinct pattern, although the spatial pattern of tree position and size was random
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