3,181 research outputs found
Evaluation and proposal for a new PMC Pea Harvester Support System
No full textPMC Harvesters Ltd is an OEM (Original Equipment Manufacturer) for the pea and
bean market. Their primary product line is a self propelled harvester known as the
979 CT harvester. The 979 CT is of considerable proportions being 4m x 4m x 12m
in overall dimensions, six wheel drive and weighs 29,620 kg GVW (Gross Vehicle
Weight) when fully laden.
The aim of this work was to identify and outline possible solutions for the support
system (tyre or track and undercarriage), quantify the performance of each system,
produce a design and evaluation method to determine an optimal structural
specification and to produce a design recommendation for the application.
Analysis of the current 979 CT harvester wheel configuration highlighted many
constraining factors in tyre choice. The most pertinent of these was that the wheels
have a very limited operating space and following a study of the possible tyre options
it became apparent only two manufactures, Michelin and Trelleborg, could provide
tyres which met the vehicle parameters.
An experiment was conducted to evaluate the performance of the three chosen tyre
options. From the findings of these tests it was clear that the optimal tyre for the
PMC configuration was the Trelleborg Twin Radial tyre, operating at minimum road
inflation pressure (1.6 bar) as designated by Trelleborg.
When operating the harvester in its normal working environment the tyre pressure
should be set at minimum road inflation for in-field conditions with a DBD (Dry Bulk
Density) of > 1.3 g/cm3, as excess damage caused by operating above minimum field
operating pressure is superficial.
The use of low compaction equipment such as CTIS (Central Tyre Inflation System)
or tracks would not be beneficial to the PMC application. The track tested created a
hardened track pan, thus requiring more effort to rectify post harvest. A CTIS increases the consumption of diesel and offered no reduction in soil compaction
below plough depth as shown by the findings from operating the optimal tyre at
minimum field inflation pressure (1.2 bar).
The primary objective of this project was to offer solutions to reduce the effects of the
PMC harvester’s weight on its operating medium. The first natural step was to assess
the vehicles main structure in order to improve its performance to weight ratio. The
initial phase of this process was to validate the modelling and analyses techniques
used to assess the structure. This was done within a controlled test environment at
CU@S and from this work a factor of safety of 10% was designated to be applied to
all analysis in order to authenticate results and generate a “worst case” answer.
Revisions of the main chassis, main pivot and rear axle assemblies were created and
analysed. Test metrics were defined which represented operating patterns of the
harvester. The findings from these tests saw a 22.6% weight reduction, 43.1%
increase in life expectancy and 10.2% reduction in peak stress in the main chassis and
main pivot. Unlike the other two key assemblies, the rear axle was deemed fit for
purpose and would not benefit from any further design changes
Facing the Future: the Changing Shape of Academic Skills Support at Bournemouth University
No full textThis paper explores the potential impact of changes to higher education in England on student expectations, engagement, lifestyles and diversity, and outlines implications for the development of digital literacy within academic skills support at Bournemouth University (BU). We will investigate how tackling resource constraints with organisational change can also enable efficient, centralised provision of support materials that utilise networks to overcome the risk of fragmented support for digital literacy. We will also look at how changing delivery modes for support can accommodate changing student lifestyles whilst tackling a weakness of centralised support for digital literacy: that it can become detached from the student’s subject-focused academic practice. Finally we will explore how involving students in developing support can help us to face changes to student expectations and engagement whilst ensuring that materials are authentic and speak to learners in their own voice
Why Privacy Matters: An Interview with Neil Richards
No full textProfessor Daniel J. Solove discusses the book \u27Why Privacy Matters\u27 and the future of privacy with the author, Professor Neil Richards
Interview with AntipodeFoundation.org: “Much More Than You Think: The Spatialities of Italian Autonomy” – Interview with Neil Gray, author of “Beyond the Right to the City: Territorial Autogestion and the Take over the City Movement in 1970s Italy”
No full textNo abstract available
Jere Nash Interview with Neil McMillen (Part 2 of 2)
No full textInterview conducted by author Jere Nash with University of Southern Mississippi history professor Neil R. McMillen in the process of writing Mississippi Politics: The Struggle for Power, 1976-2006. Topics discussed include Aaron Henry; race relations after the civil rights movement; and William Winter
Maximizing Research Impact Through Institutional and National Open-Access Self-Archiving Mandates
No full textNo research institution can afford all the journals its researchers may need, so all articles are losing research impact (usage and citations). Articles made “Open Access,” (OA) by self-archiving them on the web are cited twice as much, but only 15% of articles are being spontaneously self-archived. The only institutions approaching 100% self-archiving are those that mandate it. Surveys show that 95% of authors will comply with a self-archiving mandate; the actual expe-rience of institutions with mandates has confirmed this. What institutions and funders need to mandate is that (1) immediately upon acceptance for publication, (2) the author’s final draft must be (3) deposited into the Institutional Repository. Only the depositing needs to be mandated; set-ting access privileges to the full-text as either OA or Restricted Access (RA) can be left up to the author. For articles published in the 93% of journals that have already endorsed self-archiving, access can be set as OA immediately; for the remaining 7%, authors can email the eprint in re-sponse to individual email requests automatically forwarded by the Repository
Gaiman, Neil
No full textA brief description of the main characteristics of the works for children of the British author Neil Gaiman, the themes he privileges in his stories, the way he portrays children and the relationship between children and adults
Dissimilarity is used as evidence of category membership in multidimensional perceptual categorization: a test of the similarity-dissimilarity generalized context model
No full textIn exemplar models of categorization, the similarity between an exemplar and category members constitutes evidence that the exemplar belongs to the category. We test the possibility that the dissimilarity to members of competing categories also contributes to this evidence. Data were collected from two 2-dimensional perceptual categorization experiments, one with lines varying in orientation and length and the other with coloured patches varying in saturation and brightness. Model fits of the similarity-dissimilarity generalized context model were used to compare a model where only similarity was used with a model where both similarity and dissimilarity were used. For the majority of participants the similarity-dissimilarity model provided both a significantly better fit and better generalization, suggesting that people do also use dissimilarity as evidence
Jere Nash Interview with Neil McMillen (Part 1 of 2)
No full textInterview conducted by author Jere Nash with University of Southern Mississippi history professor Neil R. McMillen in the process of writing Mississippi Politics: The Struggle for Power, 1976-2006. Topics dicussed include race and politics in Mississippi; southern historians including Dewey Grantham, C. Vann Woodward, Numan V. Bartley, John Boles; segregation in Mississippi and resistance to change; genesis of McMillin\u27s book Dark Journey; fifteenth Freedom Summer reunion at Millsaps and Tougaloo; John Ditmer; contributing to A History of Mississippi edited by Richard Aubrey McLemore and reaction by the public and University of Southern Mississippi officials; hiring of African American faculty at USM; M.M. Roberts; and William D. McCain
Discussion of Neil Altman's paper, ‘psychoanalysis and war’
No full textThis paper consists of a discussion of Neil Altman's ‘Psychoanalysis and war’, which was conducted online through PsyBC in the fall of 2006. Discussants were a group of psychoanalytically oriented thinkers chosen by the author and Nancy Hollander, the author of the other paper included in the discussion. The paper represents the full discussion with only minor edits to correct typographical errors and improve clarity
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