2,986 research outputs found

    Can It Work for Us Too? Results from Using West Point’s Fundamentals of Engineering Mechanics and Design Course Redesign

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    At the 2017 ASEE National Conference and Exhibition two papers from the US Military Academy (one in the Mechanics Division and one in the Civil Engineering Division) detailed a redesign of their initial mechanics sequence and the introduction of Inquiry Based Learning Activities. The authors of those papers extended an offer to share details and materials of their course redesign and associated lesson activities. The authors of this paper took them up on that offer and in the Fall of 2017 implemented the changes proposed at the US Military Academy at their institution. The question this paper strives to answer is, can a similar course redesign produce similar results at an institution, that in many respects is very different from the US Military Academy; essentially is the West Point redesign reproducible and the results replicable and if so under what conditions? This paper will strive to use many of the same measures from the original paper in the analysis of the success or failure of the implementation. The paper will also examine and document the differences between the students and institutions. It will then note differences in the administration of the course, changes made, and conduct of the course, to include number of instructors, sections, section size, group size and the demographic make-up of students in the course and list the effect of the differences discovered at this time. Finally, considering differences and similarities, the paper will analyze and capture the results and the effects of the two applications of the course redesign to come up with an answer to the research question

    Making Legacy Thermal Storage Heating fit for the Smart Grid

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    Collaborative paper with Oxford University Environmental Change Institute and Energy Local Ltd. The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.Thermal storage heaters, charged using overnight off-peak electricity, have been used for domestic space heating in the UK and other countries since the 1980s. However, they have always been difficult for consumers to manage efficiently and, with the advent of a high proportion of renewables in the electricity generation mix, the time of day when they are charged needs to be more flexible. There is also a need to reduce peaks in the demand profile to allow distribution networks to support new sources of demand such as electric vehicles. We describe a trial of a smart control system that was retrofitted to a group of six dwellings with this form of heating, with the objectives of providing more convenient and efficient control for the users while varying the times at which charging is performed, to flatten the profile of demand and make use of locally-generated renewable electricity. The trial also employs a commercially-realistic combination of a static time-of-day tariff with a real time tariff dependent on local generation, to provide consumers with the opportunity and incentive to reduce their costs by varying times of use of appliances. Results from operation over the 2015-16 heating season indicate that the objectives are largely achieved. It is estimated that on an annualised and weather-adjusted basis most of the users have consumed less electricity than before intervention and their costs are less on the trial tariffs. Critical factors for success of this form of system are identified, particularly the need to facilitate hands-on control of heating by thrifty users and the importance of an effective and sustained user engagement programme when introducing the technology, to ensure users gain confidence through a readily-accessible source of support and advice

    Evaluation of method of preparation of passive diffusion tubes for measurement of ambient nitrogen dioxide

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    This study was carried out in response to suggestions that the measurement of NO2 by Palmes-type passive diffusion tubes (PDT) is affected by the method of preparation of the triethanolamine (TEA) absorbent coating on the grids. The following combinations of factors were investigated: TEA solvent (acetone or water), volume composition of TEA in solvent (50% or 20%), and grid coating method (dipping in solution prior to assembly or pipetting solution on after assembly). Duplicate PDTs prepared by each of the 8 methods were exposed in parallel, in urban air, for a total of 80 separate 1 week exposures. NO2 concentrations derived from PDTs prepared by pipetting methods were significantly less precise than concentrations from dipping methods, with mean RSDs for duplicate measurements of 13.8% and 8.5%, respectively (n = 316 each category). Pipetting methods using solutions of 50% TEA composition were particularly imprecise (mean RSD 17.2%). Data from PDTs prepared by pipetting methods were systematically more poorly correlated with each other and with data from co-located chemiluminescence analysers, than corresponding data from PDTs prepared by dipping methods, indicating that more consistent accuracy was also obtained by the latter PDTs. The statistical evidence suggested that PDTs prepared by pipetting 50% TEA in water generally gave lower NO2 concentrations. Although this is in agreement with a previous study, it is also possible that such an observation here may be a statistical artefact given the demonstrably poorer precision of this method. The general tendency of PDTs to show positive bias in NO2 measurement in urban air in 1 week exposures was again evident in this study (mean biases at roadside and urban centre locations of +35% (n = 475) and +18% (n = 112), respectively) consistent with augmentation of within-tube NO2 flux by chemical reaction between co-diffusing NO and O3. Overall, it is recommended that the pipetting method of PDT grid preparation is avoided, or at least investigated further, because of the apparent degradation in precision and accuracy of NO2 measurement. Potential reasons for the effect are discussed

    The social cognition of medical knowledge, with special reference to childhood epilepsy

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    This paper arose out of an engagement in medical communication courses at a Gulf university. It deploys a theoretical framework derived from a (critical) sociocognitive approach to discourse analysis in order to investigate three aspects of medical discourse relating to childhood epilepsy: the cognitive processes that are entailed in relating different types of medical knowledge to their communicative context; the types of medical knowledge that are constituted in the three different text types analysed; and the relationship between these different types of medical knowledge and the discursive features of each text type. The paper argues that there is a cognitive dimension to the human experience of understanding and talking about one specialized from of medical knowledge. It recommends that texts be studied in medical communication courses not just in terms of their discrete formal features but also critically, in terms of the knowledge which they produce, transmit and reproduce

    Disparities in Major Joint Replacement Surgery among Adults with Medicare Supplement Insurance

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    The objective of this study was to determine if disparities in hip and knee replacement surgery exist among osteoarthritis patients with AARP-branded Medicare supplement plan (ie, Medigap) coverage provided by UnitedHealthcare. Patients were selected into the study if they had 1 or more medical claims with a diagnosis of osteoarthritis from July 1, 2006 to June 30, 2007. Logistic regression analyses tested for age-, sex-, race-, or income-related differences in the likelihood of receiving a hip or knee replacement surgery. The regression models controlled for socioeconomics, health status, type of supplement plan, and residential location. Of the 2.2 million Medigap insureds eligible for this study, 529,652 (24%) had osteoarthritis. Of these, 32,527 (6.1%) received a hip or knee replacement. Males were 6% (P-<-0.001) more likely than females to have a replacement surgery. Patients living in minority or lower income neighborhoods were less likely to receive a hip or knee replacement. Supplement plan type was not a strong predictor of the likelihood of hip or knee replacement. Disparities were much greater by comorbid condition and residential location. Disparities in hip and knee replacement surgery existed by age, sex, race, and income levels. Larger disparities were found by residential location and comorbid condition. Interventions are being considered to address these disparities. (Population Health Management 2011;14:231-238)Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90479/1/pop-2E2010-2E0042.pd

    Male aggression varies with consortship rate and habitat in a dolphin social network

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    Coalitions and alliances exemplify the core elements of conflict and cooperation in animal societies. Ecological influences on alliance formation are more readily attributed to within-species variation where phylogenetic signals are muted. Remarkably, male Indo-Pacific bottlenose dolphins in Shark Bay, Western Australia, exhibit systematic spatial variation in alliance behavior, not simply within a species or population, but within a single social network. Moving SE-NW along Peron Peninsula in Shark Bay, males ally more often in trios than pairs, consort females more often, and exhibit greater seasonal movements. Ecological models predict more male-male conflict in the north, but sufficient observations of aggression are lacking. However, dolphins often incur marks, in the form of tooth rakes, during conflicts. Here we report that the incidence of new tooth rake marks varies systematically in the predicted pattern, with greater marking in the north, where males form more trios and consort females at a higher rate. While our previous work demonstrated that alliance complexity has an ecological component, we can now infer that ecological variation impacts the level of alliance-related conflict in Shark Bay

    The Ursinus Weekly, May 2, 1955

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    Spring play May 12-14 in T-G gym • Y installs officers at vespers Sunday • Pre-meds to hear polio expert tonite • Hamilton to head pre-legal society • Meistersingers end season with Music for you • National music frat installed at Ursinus • Mass rehearsals listed for May Day • Y retreat at Mensch Mill; New cabinet assumes duties • Pictures taken of college X-day • Mr. L. Krug heads C-T school district • Sasha Siemal tells of jaguar hunting • \u2756 Ruby will take Spring sports pictures tomorrow • Editorials: Here\u27s a spot for you • Letters to the editor • Dining-room has unusual guest • Fraternity row • Thinclads lose again despite victories by Herwig, Lawhead • Fords blank Bruin netmen in 9-0 rout • Girls tie record with 3-2 net win • Bruins smash Dickinson; Edge Fords in 4-3 contest • Sholl\u27s hit wins 1-0 mound duel • Dr. Franklin Watts speaks to WRC • Canterbury Club visits Preventorium • A.P.O. waits until Fall for charter • Debaters beat Haverfordhttps://digitalcommons.ursinus.edu/weekly/1473/thumbnail.jp
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