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The Doubters Dilemma

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ISBN: 9781760460440 Year: DOI: 10.22459/DD.08.2016 Language: English
Publisher: ANU Press
Subject: Linguistics
Added to DOAB on : 2016-09-22 11:01:20
License: ANU Press

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This book explores the extent and causes of attrition and retention in university Language & Culture (L&C) programs through a detailed analysis of an institutional case study at The Australian National University (ANU). Using extensive data collected through student surveys, coupled with data mining of university-wide enrolment data, the authors explore the enrolment and progress of students in all ANU L&C programs. Through their detailed statistical analysis of attrition and retention outcomes, the authors reveal serious inadequacies in the traditional, and common, methodology for determining the extent of student attrition and retention in tertiary L&C programs. Readers are shown why a year-to-year comparison of students who continue or discontinue language studies using traditional statistical methodology cannot provide data that is sufficiently meaningful to allow for sound policy- and decision-making. The authors instead suggest a more valid, replicable methodology that provides a new approach potentially applicable to all disciplines and all student retention measures. The authors also demonstrate that the empirical data supports a new hypothesis for the reasons for attrition, based on students’ relative belief or doubt in their capacity to complete their studies successfully. By highlighting the importance of language capital as a factor in students’ concerns about their capacity for success, and hence in their decisions to stay in, or leave, a university language program, the authors show the importance of the ‘doubters’ dilemma’. By taking a rigorous approach to hypothesis building and testing around enrolment and attrition data, the authors provide valuable insights into attrition issues, and potential retention strategies, in L&C programs, which will be relevant to institutions, policy-makers and teaching academics.

Discontinuous Fiber Composites

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ISBN: 9783038974918 / 9783038974925 Year: Pages: 210 DOI: 10.3390/books978-3-03897-492-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General) --- General and Civil Engineering --- Materials
Added to DOAB on : 2019-01-15 12:25:03
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Discontinuous fiber-reinforced polymers have gained importance in the transportation industries due to their outstanding material properties, lower manufacturing costs and superior lightweight characteristics. One of the most attractive attributes of discontinuous fiber reinforced composites is the ease with which they can be manufactured in large numbers, using injection and compression molding processes.Typical processes involving discontinuous fiber reinforced thermoplastic composite materials include injection and compression molding processes as well as extrusion. Furthermore, the automotive and appliance industries also use thermosets reinforced with chopped fibers in the form of sheet molding compound and bulk molding compound, for compression and injection-compression molding processes, respectively.A big disadvantage of discontinuous fiber composites is that the configuration of the reinforcing fibers is significantly changed throughout production process, reflected in the form of fiber attrition, excessive fiber orientation, fiber jamming and fiber matrix separation. This process-induced variation of the microstructural fiber properties within the molded part introduces heterogeneity and anisotropies to the mechanical properties, which can limit the potential of discontinuous fiber reinforced composites for lightweight applications.The main aim of this Special Issue is to collect various investigations focused on the processing of discontinuous fiber reinforced composites and the effect processing has on fiber orientation, fiber length and fiber density distributions throughout the final part. Papers presenting investigations on the effect fiber configurations have on the mechanical properties of the final composite products and materials are welcome in the Special Issue. Researchers who are modeling and simulating processes involving discontinuous fiber composites as well as those performing experimental studies involving these composites are welcomed to submit papers. Authors are encouraged to present new models, constitutive laws and measuring and monitoring techniques to provide a complete framework on these groundbreaking materials and facilitate their use in different engineering applications.

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