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Now showing items 1 - 16 of 223

  • Offshore and onsite placement testing for English pathway programmes

    Roche, Thomas   Harrington, Michael  

    English language programmes provide established pathways for international students seeking university admission in countries such as Australia and the United Kingdom. In order to refer international applicants to appropriate levels and durations of English language support prior to matriculation into their main course of study, pathway providers need effective and efficient language assessment tools. This report evaluates the effectiveness of an online vocabulary knowledge test as an index of English proficiency for university English pathway programme applicants (N =3D 177). The Timed Yes/No (TYN) test measures vocabulary recognition size and speed in a time-and resource-effective format. Test results were correlated with performance on a comprehensive placement test consisting of speaking, writing, reading and listening components. The predictive validity of word recognition accuracy (a proxy for size) and response time (a measure of efficiency) for placement test outcomes were examined independently and in combination. The TYN test scores' sensitivity at predicting comprehensive placement test scores were assessed using a cut-score analysis resulting in an identification accuracy rate ranging from 76 to 86% for five critical band scores. The potential use of the online vocabulary-screening test for measuring international students' English language proficiency is discussed in terms of reliability, validity, speed, usability and cost-effectiveness in onsite and offshore testing conditions.
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  • A Response to Joseph Adler

    Harrington, Michael  

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  • Photoablation of Human Vitreous Opacities by Light-Induced Vapor Nanobubbles

    Sauvage, Felix   Fraire, Juan C.   Remaut, Katrien   Sebag, J.   Peynshaert, Karen   Harrington, Michael   Van de Velde, Frans J.   Xiong, Ranhua   Tassignon, Marie-Jose   Brans, Toon   Braeckmans, Kevin   De Smedt, Stefaan C.  

    Myopia, diabetes, and aging are the main causes of progressive vitreous collagen aggregation, resulting in vitreous opacities, which can significantly disturb vision. As vitreous opacities, which induce the visual phenomenon of "floaters", are accessible with nanomaterials and light, we propose a nanotechnology-based approach to locally ablate them with highly reduced light energy compared to the more traditional YAG laser therapy. Our strategy relies on the plasmon properties of gold nanoparticles that generate vapor nanobubbles upon pulsed-laser illumination whose mechanical force can ablate vitreous opacities. We designed gold nanoparticles coated with hyaluronic acid (HA), which have excellent diffusional mobility in human vitreous, an essential requirement to reach the vitreous opacities. In addition, we found that HA-coated gold nanoparticles can accumulate extensively on human vitreous opacities that were obtained by vitrectomy from patients with vision-degrading myodesopsia. When subsequently applying nanosecond laser pulses, the collagen aggregates were efficiently destroyed with similar to 1000 times less light energy than typically used in YAG laser therapy. This low-energy "floater-specific destruction", which is due to the accumulation of the small gold nanoparticles on the opacities, is attractive, as it may be safer to the surrounding ocular tissues while at the same time being easier and faster to apply compared to YAG laser therapy, where the opacities need to be ablated piece by piece by a tightly focused laser beam. Gold nanoparticle-assisted photoablation may therefore provide a safer, faster, and more reliable destruction of vitreous opacities in the treatment of ophthalmologic diseases.
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  • PRINCIPLE AND PLACE:COMPLEMENTARY CONCEPTS IN CONFUCIAN YIJING COMMENTARY

    Harrington, Michael  

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  • Lexical Facility ||

    Harrington, Michael  

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  • SYSTEM AND METHOD FOR ORIENTING BUNDLES

    The present disclosure relates to a bundle orienting device ( 50 ) in-line with a conveyor configured for transporting bundles in a conveying direction. The bundle orienting device can include a plurality of selectively actuatable orientation elements ( 80 ) that, collectively, laterally and/or angularly displace a bundle as it travels in the conveying direction through the bundle orienting device. In addition, the present disclosure relates to a method for rotating bundles traveling in a conveying direction along a conveyor system. The method includes conveying a bundle along a conveyor to pass through a bundle orienting device, thus described.
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  • Google Earth Forensics || Digital Forensics 101

    Harrington, Michael  

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  • Google Earth Forensics || Using Google Earth

    Harrington, Michael  

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  • Google Earth Forensics || KML/XML/HTML

    Harrington, Michael  

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  • Google Earth Forensics || Google Earth Basics

    Harrington, Michael  

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  • Google Earth Forensics || GPS, GIS, and Google Earth

    Harrington, Michael  

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  • Google Earth Forensics || Working a Case

    Harrington, Michael  

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  • Imaging of plant cell walls by confocal Raman microscopy

    Gierlinger, Notburga   Keplinger, Tobias   Harrington, Michael  

    Raman imaging of plant cell walls represents a nondestructive technique that can provide insights into chemical composition in context with structure at the micrometer level (<0.5.mu m). The major steps of the experimental procedure are described: sample preparation (embedding and microcutting), setting the mapping parameters, and finally the calculation of chemical images on the basis of the acquired Raman spectra. Every Raman image is based on thousands of spectra, each being a spatially resolved molecular 'fingerprint' of the cell wall. Multiple components are analyzed within the native cell walls, and insights into polymer composition as well as the orientation of the cellulose microfibrils can be gained. The most labor-intensive step of this process is often the sample preparation, as the imaging approach requires a flat surface of the plant tissue with intact cell walls. After finishing the map (acquisition time is similar to 10 min to 10 h, depending on the size of the region of interest and scanning parameters), many possibilities exist for the analysis of spectral data and image generation.
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  • Reducing Boarding in a Post-Anesthesia Care Unit

    Price, Carter   Golden, Bruce   Harrington, Michael   Konewko, Ramon   Wasil, Edward   Herring, William  

    When operating room schedules in hospitals are produced, the constraints and preferences of surgeons and hospital workers are a primary consideration. The downstream impact on post-operative bed availability is often ignored. This can lead to the boarding of patients overnight in the post-anesthesia care unit (PACU) because intensive care unit beds are unavailable. In this paper, we apply integer programming and simulation to develop improved surgical scheduling assignments. We want to balance new surgeries with hospital discharges in order to reduce the variability of occupied beds from one day to the next and, as a result, to reduce boarding in the PACU.
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  • Aspects of working memory in L2 learning

    Juffs, Alan   Harrington, Michael  

    This article reviews research on working memory (WM) and its use in second language (L2) acquisition research. Recent developments in the model and issues surrounding the operationalization of the construct itself are presented, followed by a discussion of various methods of measuring WM. These methods include word and digit span tasks, reading, listening and speaking span tasks. We next outline the role proposed for WM in explaining individual differences in L2 learning processes and outcomes, including sentence processing, reading, speaking, lexical development and general proficiency. Key findings are that WM is not a unitary construct and that its role varies depending on the age of the L2 learners, the task and the linguistic domain. Some tests of WM may in fact be tests of differences in ability to attend to aspects of the L2. Future research will focus on matching tests of WM more closely with linguistic tasks and using more standardized, replicable measures of WM in new areas including writing in non-alphabetic scripts, instructional interventions and cognitive neuropsychology.
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  • BUNDLE BREAKER

    The present disclosure relates to a bundle separator for separating bundles from a log traveling along a conveyor, the log having a plurality of stacked sheets with a weakened separation path, and the weakened separation path of each sheet being substantially aligned in the stack. The separator includes a first platen (52) mounted for vertical reciprocating movement generally on a first side of the separation path and a second platen (54) mounted for vertical reciprocating movement generally on a second side of the separation path, each platen having a plurality of moveable guided rails (56). The second platen (54) is also mounted for movement away from the first platen (52). The moveable guided rails (56) on each of the first and second platens (52,54) are each independently moveable in the upstream or downstream direction of travel of the log.
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