Post crack flexural toughness in steel fabric and fibre reinforced concrete beams

The purpose of the paper is to provide independent research and evaluate manufacturers’ claims that structural polypropylene fibres provide satisfactory crack control reinforcement and compare the test results from macro synthetic polypropylene fibres against steel fabric reinforced concrete, extensively used as a crack control medium in concrete ground bearing floor/hardstanding slabs where tensile forces are likely to occur. Three concrete beam types were produced, plain, steel reinforced and fibre reinforced, and a comparative study was undertaken of post crack flexural toughness. The procedure used was to manufacture steel A 142 fabric and macro fibre reinforced concrete beams to provide load, deflection data, toughness indices and was compliant with, ASTM C1018 -97, [ASTM, 1997] using a three point loading arrangement. The data was representative of what might occur in a floor slab. The findings of the paper is that A1 42 steel fabric reinforcement as used in slabs was more effective in producing toughness and residual strength when directly compared to the performance of structural polypropylene fibre reinforced concrete. When small post crack forces are encountered within the concrete matrix, polypropylene macro fibres are suitable for crack control. The paper makes direct comparisons between known and widely used crack control using steel fabric, and the use of low modulus polypropylene macro synthetic fibres as a crack control medium

Mining and development : examining the effectiveness of mining company community development intervention in New Ireland Province, Papua New Guinea : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Development Studies at Massey University, Manawatu, New Zealand

This thesis explores the effectiveness of mining company contributions to development within the gold mining communities of Lihir and Simberi islands, in New Ireland Province, Papua New Guinea (PNG). More specifically, it analyses the extent to which forms of community development intervention undertaken on Lihir Island by Newcrest Mining Ltd, and on Simberi Island by St Barbara Ltd, actually support meaningful forms of development. This has been achieved through the use of development ethics (Goulet 1995) as a conceptual research framework, which when applied in research practice, gives priority to the wellbeing of those whose realities may be ignored, misread or marginalised within the neoliberal realm of development. This research is based on a total of four months of fieldwork undertaken on Lihir and Simberi islands. It draws on community narratives to frame the relevance of human wellbeing, human rights and inclusive development as development ethics within the research context. This development ethics research lens facilitates discussion about the meaningfulness of development intervention from a morally-informed community development perspective. Underpinned by a locally contextualised appreciation of what human wellbeing and meaningful development means on Lihir and Simberi islands (which results in the exposition of a set of local Community Wellbeing and Development Rights), a critical review of the practice and governance of development intervention within each Island community is then detailed. The analysis of development interventions then proceeds using firstly an evaluation of practices within a human rights lens, and secondly consideration of inclusive development outcomes relative to Newcrest's and St Barbara’s development related rhetoric. The resulting account of mining company community development intervention is critical, but ultimately hopeful. This hopefulness reflects the hope of customary landowners that mining will one day lead to meaningful development benefits. The analysis from this development ethics lens reveals insights into the promotion of social justice through the delivery of mining company development interventions. It is argued that mining companies have the opportunity to enhance a set of locally significant and internationally recognised human rights that are important to the wellbeing and development of customary landowners. Although, in some instances, mining company performance is falling short with respect to the enhancement of these human rights, it is argued that the enhancement of Community Wellbeing and Development Rights exists as a potential means for mining companies to add value to host communities. However, if such a development programme is to be meaningful to customary landowners, it must also advance equity and fairness. If mining companies fail to navigate such complexities, this thesis contends that mining, and forms of mining company community development intervention, will likely do more harm to communities than good

Managing Ambiguous Amphibians: Feral Cows, People, and Place in Ukraine’s Danube Delta

This paper analyzes how a herd of feral cattle emerged in the core zone of Ukraine’s Danube Biosphere Reserve and why it still exists despite numerous challenges to the legality of its presence there. Answering these questions requires an analytical approach that begins from the premise that animals, plants, substances, documents, and technologies are active participants in making social and political worlds rather than passive objects of human intervention and manipulation. Drawing together insights from multispecies ethnography, animal geography, amphibious anthropology, and studies of nature protection in former Soviet republics, the author argues that the feral cattle exist because they are part of an amphibious multispecies assemblage in which relations among cattle, elements of the delta’s wetland ecologies, legal norms, and the Reserve managers’ documentation practices have aligned to create an autonomous space for cattle to dwell with minimal human intervention

The plot thickens

Fiction based on real people and events poses particular challenges for the writer. While the outline of the story has already been sketched by reality, sometimes the plethora of facts can be overwhelming, making it difficult for the writer to find the shape of the story. In this paper I will discuss my approach to turning a real historical event - a court case in late 17th century Edinburgh - into a piece of fiction. I will examine how I have used primary and secondary source material to create plot and character motivation

MEDIN Feasibility Study : archiving oil and gas industry site survey data

This report was commissioned by the Marine Environmental and Information Network (MEDIN) to investigate the feasibility of collecting oil and gas industry site surveys conducted on the UKCS (UK Continental Shelf) for archive in the MEDIN DAC (Data Archive Centre) network. The archive of three principle data types is explored; information about legacy site surveys, catalogues of information about data products associated with site surveys and actual site survey data, which may include a survey report and enclosures and/or a selection of data e.g. side-scan or multibeam, sample descriptions and seismic profiles. The merits of the collection of these data types are explored alongside the cost implications, from both an oil and gas industry contractor’s and a marine geoscientist’s perspective, thereby enabling MEDIN to better understand and make decisions as to which data to concentrate on. The principles and proposed procedures for carrying out the collection of these data types are outlined however the practical details of these will require agreement should any decision be made to proceed. At this stage a further thorough detailed scope will be required in order to formulate procedures, qualify numbers, define activities, identify resources and plan timescales. The time period for the collection of legacy site surveys will require consideration i.e. how far back it is feasible to collect this information, and whether requests should be phased to include surveys acquired within predetermined time intervals. The size of the actual site survey data holdings, the storage capacity required to archive these and the amount of work involved in processing this data into useable and useful formats will require review. Some of these issues may need to be considered on a case-by-case basis. The procedures themselves will require regular review dependent on the response i.e. the volume, types and condition of data received

Polypropylene fibres within concrete with regard to heat induced spalling and reduction in compressive strength

The paper examines the effect of various polypropylene fibre additions (Types 1 and 2 and different fibre volumes) to concrete with regard to explosive spalling when subject to high temperatures similar to that experienced in building or tunnel fires. The pilot study used to determine an appropriate heat source for the test showed concrete to be a significant insulator and fire protection for structural members. Explosive spalling was shown to be reduced with the use of polypropylene fibres but the final compressive strength of concrete was significantly reduced and had little residual structural value after a 2 hour period of heating

Traces of heat operators on Riemannian foliations

We consider the basic heat operator on functions on a Riemannian foliation of a compact, Riemannian manifold, and we show that the trace of this operator has a particular short time asymptotic expansion. The coefficients in this expansion are obtainable from local transverse geometric invariants - functions computable by analyzing the manifold in an arbitrarily small neighborhood of a leaf closure. Using this expansion, we prove some results about the spectrum of the basic Laplacian, such as the analogue of Weyl's asymptotic formula. Also, we explicitly calculate the first two nontrivial coefficients of the expansion for special cases such as codimension two foliations and foliations with regular closure.Comment: 37 pages, citations update

Cut loose in the Caribbean : neoliberalism and the demise of the Commonwealth sugar trade

This article focuses on the way the Anglophone Caribbean succumbed to the overhaul of the European Union sugar trade and how these countries have attempted to restructure their economies in its wake. We show how the protagonists of reform gave a sense of inevitability to the demise of the Commonwealth trade system and conveyed (unrealistic) strategies for how this should be managed for the benefit of the Caribbean. In this way we detail the hegemony of neoliberalism in contemporary trade politics and the need for alternative strategies for rural development in the Caribbean region