162 resultados para Research Methods


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Aligned with the broader movement from structuralism to the post-structuralisms [Lather, P. 2013. “Methodology-21: What Do We Do in the Afterward?” International Journal of Qualitative Studies in Education 26 (6): 634–645; St. Pierre, E. A. 2009. “Afterword: Decentering Voice in Qualitative Inquiry.” In Voice in Qualitative Inquiry: Challenging Conventional, Interpretive, and Critical Conceptions in Qualitative Research, edited by A. Y. Jackson and L. A. Mazzei, 221–236. London: Routledge; St. Pierre, E. A. 2013. “The Posts Continue: Becoming.” International Journal of Qualitative Studies in Education 26 (6): 646–657], research in disability studies for the past two decades has found ‘the potholes’ [Miller, L., J. B. Whalley, and I. Stronach. 2012. “From Structuralism to Poststructuralism.” In Research Methods in the Social Sciences, edited by B. Somekh and C. Lewin. London: SAGE] of disability rights scholarship. In this paper, I offer a critical research framework in the field of disability studies in education that is theoretical, political and personal. Concentrating on the positioning of disability, I draw on the methodological tools of post-structural representation, subjectivity and constructivist grounded theory to study how discursive practices within (and around) secondary schools shape ‘included’ disabled subjects. In the paper I develop this framework and then demonstrate its application in ongoing research that critically counters the conventions that marginalize particular students in schools.

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Zooplankton Invertebrate Iridescent viruses (ZoopIIVs: Iridoviridae) were discovered infecting copepods. Assays were developed for monitoring an infectious ZoopIIV; and the virus ultrastructure and host infection sites were described. The pioneering work has advanced research methods and our knowledge of infectious viruses in the zooplankton that provide critical ecosystem services globally

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Research question: A major barrier to retaining existing customers is the difficulty in knowing who is most at risk of leaving (or ‘churning’). Given the strategic and financial importance of season ticket holders (STH) to professional sport teams, this paper examines the effectiveness of a range of variables in identifying the STH who are most likely to churn.
Research methods: A longitudinal field study was undertaken to reflect actual conditions. Survey data of a professional sport team STH were collected prior to the conclusion of the season. Actual renewal data were then tracked from team records the following season. This work was replicated across five professional sport teams from the Australian Football League, with renewal predictions made and tracked for over 10,000 STH.
Results and findings: The results suggest that the ‘Juster’ Scale – a simple, one-item purchase probability measure – is an effective identifier of those most at risk of churning, more than 3 months in advance. When combined with ticket utilization and tenure measures, predictive accuracy improves markedly, to the point where these three measures can be used to provide an effective early warning system for managers.
Implications: Whilst there is a tendency to view STH as highly loyal, these data reinforce the importance of actively managing all customers to reduce churn. Despite their commitment, STH do churn, but those most likely to can be predicted by examining their patterns of behaviour in the current season. Efforts to retain STH need to shift their focus from transactional value assessments.

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The exponential increase in data, computing power and the availability of readily accessible analytical software has allowed organisations around the world to leverage the benefits of integrating multiple heterogeneous data files for enterprise-level planning and decision making. Benefits from effective data integration to the health and medical research community include more trustworthy research, higher service quality, improved personnel efficiency, reduction of redundant tasks, facilitation of auditing and more timely, relevant and specific information. The costs of poor quality processes elevate the risk of erroneous outcomes, an erosion of confidence in the data and the organisations using these data. To date there are no documented set of standards for best practice integration of heterogeneous data files for research purposes. Therefore, the aim of this paper is to describe a set of clear protocol for data file integration (Data Integration Protocol In Ten-steps; DIPIT) translational to any field of research.

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'The First Time' is a performance about twelve beginning teachers' first experiences, and is constructed from data generated throughout 2011 for my PhD through a theatre-based research approach. ‘The First Time’ is performed by teachers - most of whom are drama teachers - in order to sensitively represent the real stories of the research participants. 'The First Time' centers around first experiences in teaching, and while it is primarily about beginning teachers' experiences, the idea of firsts in teaching is a universal one, and one through which teachers share their experiences, knowledge and understanding of the ways of becoming a teacher. The workshop includes a performance of 'The First Time' and a discussion of the themes that have been raised through the staging of this performance - such as beginning teacher's experiences, performing the stories of real people, teachers' experiences as performers, and the uses of theatre-based research methods. The workshop also includes the opportunity for participants to experiment with the theatre-based research method.

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The ability to image electrochemical processes in situ using nuclear magnetic resonance imaging (MRI) offers exciting possibilities for understanding and optimizing materials in batteries, fuel cells and supercapacitors. In these applications, however, the quality of the MRI measurement is inherently limited by the presence of conductive elements in the cell or device. To overcome related difficulties, optimal methodologies have to be employed. We show that time-efficient three dimensional (3D) imaging of liquid and solid lithium battery components can be performed by Sectoral Fast Spin Echo and Single Point Imaging with T1 Enhancement (SPRITE), respectively. The former method is based on the generalized phase encoding concept employed in clinical MRI, which we have adapted and optimized for materials science and electrochemistry applications. Hard radio frequency pulses, short echo spacing and centrically ordered sectoral phase encoding ensure accurate and time-efficient full volume imaging. Mapping of density, diffusivity and relaxation time constants in metal-containing liquid electrolytes is demonstrated. 1, 2 and 3D SPRITE approaches show strong potential for rapid high resolution (7)Li MRI of lithium electrode components.

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This collection contributes to, advances and consolidates discussions of the range of methods and approaches in criminology through the presentation of diverse international case studies in which the authors reflect upon their experiences ...

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How do we define the globalized cinema and media cultures of Bollywood in an age when it has become part of the cultural diplomacy of an emerging superpower? Is it still an 'other' industry in a world dominated by Hollywood? Bollywood and Its Other(s) aims to compensate for the lack of scholarly literature on Indian film by opening up hitherto unexplored sites or sites that are in formation. It focuses on the aesthetic-philosophical questions of the other, Indian diaspora's negotiations with national identity, alternative reading strategies/research methods, marginal genres (sci-fi, horror), marginal characters (flaneuse, vamps), marginal gender (non-normative sexualities), marginal cinema (Hindi avant-garde), marginal language (Hinglish), and marginal regions (the Kashmir valley). It intends to address film scholars, South Asian studies researchers, cinephiles and lay readers alike.

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Adsorption of target molecules on the immobilized microcantilever surface produced beam displacement due to the differential surface stress generated between the immobilized and non-immobilized surface. Surface stress is caused by the intermolecular forces between the molecules. Van der Waals, electrostatic forces, hydrogen bonding, hydrophobic effect and steric hindrance are some of the intermolecular forces involved. A theoretical framework describing the adsorption-induced microcantilever displacement is derived in this paper. Experimental displacement of thrombin aptamer-thrombin interactions was carried out. The relation between the electrostatic interactions involved between adsorbates (thrombin) as well as adsorbates and substrates (thrombin aptamer) and the microcantilever beam displacement utilizing the proposed mathematical model was quantified and compared to the experimental value. This exercise is important to aid the designers in microcantilever sensing performance optimization.

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Understanding neural functions requires knowledge from analysing electrophysiological data. The process of assigning spikes of a multichannel signal into clusters, called spike sorting, is one of the important problems in such analysis. There have been various automated spike sorting techniques with both advantages and disadvantages regarding accuracy and computational costs. Therefore, developing spike sorting methods that are highly accurate and computationally inexpensive is always a challenge in the biomedical engineering practice.

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The performance of curtain flow chromatography column technology with MS detection was evaluated for the analysis of labile compounds. The curtain flow column design allows for separations that are faster and/or more sensitive than conventional columns, depending on how exactly the curtain flow column is configured. For example, when mass spectral detection is employed, the curtain flow column can yield separations that are 5-times faster than conventional columns when the curtain flow and the conventional columns have the same internal diameter. Or when the internal diameter of the conventional column is reduced in order to yield the same analytical through-put as the curtain flow column, the sensitivity on the curtain flow column can be as much as 66-fold higher than the conventional column. As a consequence of the higher analytical through-put less standardization is required in the analysis of labile compounds because less sample degradation is apparent. Consequently the sample integrity is preserved yielding data of a higher quality.

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The HIV-1 Gag precursor protein, Pr55(Gag), is a multi-domain polyprotein that drives HIV-1 assembly. The morphological features of HIV-1 suggested Pr55(Gag) assumes a variety of different conformations during virion assembly and maturation, yet structural determination of HIV-1 Pr55(Gag) has not been possible due to an inability to express and to isolate large amounts of full-length recombinant Pr55(Gag) for biophysical and biochemical analyses. This challenge is further complicated by HIV-1 Gag's natural propensity to multimerize for the formation of viral particle (with ∼2500 Gag molecules per virion), and this has led Pr55(Gag) to aggregate and be expressed as inclusion bodies in a number of in vitro protein expression systems. This study reported the production of a recombinant form of HIV-1 Pr55(Gag) using a bacterial heterologous expression system. Recombinant HIV-1 Pr55(Gag) was expressed with a C-terminal His×6 tag, and purified using a combination of immobilized metal affinity chromatography and size exclusion chromatography. This procedure resulted in the production of milligram quantities of high purity HIV-1 Pr55(Gag) that has a mobility that resembles a trimer in solution using size exclusion chromatography analysis. The high quantity and purity of the full length HIV Gag will be suitable for structural and functional studies to further understand the process of viral assembly, maturation and the development of inhibitors to interfere with the process.