428 research outputs found
The switch-off method: rapid investigation of flow photochemical reactions
No full textIn a flow photochemical process switching off the light source and monitoring the reaction composition as it leaves the photoreactor allows the effect of all irradiation times up to a maximum to be analysed in a single experiment. The switch-off method was illustrated using three reactions: [2 + 2] intermolecular photocycloadditions between an alkene and alkyne, and between two alkenes, and a Mallory photocyclization of cis-stilbene
An exact approach for evaluating the benefits from technological change
Get PDFIt is commonly believed that taxing agricultural commodities in developing countries, and subsidizing agricultural commodities in industrial countries, reduces incentives in the developing countries for both current production and longer-term investments in capital, knowledge, technology, and infrastructure. It is argued that distortions in agricultural markets have kept investments in research and development, and productivity rates low in agriculture in developing countries. Martin and Alston lay the theoretical foundation for empirical studies of how such distortions affect returns to agricultural research and development in developing countries. Earlier studies of the benefits from technological change have typically used partial equilibrium models with Marshallian welfare measures. Such models have not allowed for a general set of market distortions and market interactions. Techniques recently developed for evaluating welfare in the context of general equilibrium models better measure the implications of trade distorting policies. Martin and Alston describe how to harness these approaches to evaluate the benefits and costs of technological changes. They show that a modified trade expenditure function can be used to measure welfare changes exactly, with a model consistent with the optimizing behavior of both producers and consumers. They do so in a general setting that allows for multiple market distortions and multiple paths of general equilibrium feedback. They illustrate this approach using a quadratic form for a profit function that is a component of the trade expenditure function. They spell out, in principle, how to apply this approach with minimal requirements for additional information, using the results from a computable general equilibrium model. They provide a diagram to illustrate the application of the technique.Environmental Economics&Policies,Economic Theory&Research,Access to Markets,Markets and Market Access,Consumption
Investigation into standardising the graphical and operator input device modules for tactical command and control man-machine interfaces
No full textIncludes bibliographical references.The operating environment of a Tactical Command and Control system is a highly tense one in which the operator needs to perform certain complex tasks with minimum confusion, and be able to obtain an instant response from the system. Since many of the systems designed for these types of environments are similar in nature with regard to the user-interface, a need has arisen to try and standardise certain elements of the systems. This report looks specifically at standardising certain graphical display element and operator input device interfaces. It investigates the problem from a systems design level, identifying the elements required and their associated functions, discussing the results of work already undertaken in this field, and making recommendations on the use of the elements. The main objective to standardising the Man-Machine Interface (MMI) design elements is to make the code easily transferable between different hardware platforms. To transfer the code, one would ideally like to change only the interface code to the new platform, in particular, the interface to a different set of operator input devices and a different type of graphics card. Various topics related to the standardisation process are discussed, including a description of MMI design, some definitions of tactical command and control environment subjects, and a look at code reusability, rapid prototyping of systems, and object-oriented design
BELLSOUTH BUYOUT TO AFFECT ATLANTA FIRMS
No full textThe impact of AT&T\u27s acquisition of BellSouth Corp. will have a major impact on Alston & Bird and Kilpatrick Stockton, which currently provide legal services to the corporation. Professor James F. Ponsoldt said, There will be a slight increase in work over the next year, but after that, as the number of jobs in the area declines, the requirement for legal services will go down as well. To read the full story, see the Atlanta Business Chronicle . The article title is Alston & Bird, Kilpatrick Stockton may feel impact. It was published on 3/10/06, and the author is Sarah David Spears
BELLSOUTH BUYOUT TO AFFECT ATLANTA FIRMS
No full textThe impact of AT&T\u27s acquisition of BellSouth Corp. will have a major impact on Alston & Bird and Kilpatrick Stockton, which currently provide legal services to the corporation. Professor James F. Ponsoldt said, There will be a slight increase in work over the next year, but after that, as the number of jobs in the area declines, the requirement for legal services will go down as well. To read the full story, see the Atlanta Business Chronicle . The article title is Alston & Bird, Kilpatrick Stockton may feel impact. It was published on 3/10/06, and the author is Sarah David Spears
Reconstructing ice dynamics in the central sector of the last British-Irish Ice Sheet
Get PDFThe central sector (NW England and Scottish borders) of the last British-Irish Ice Sheet exhibits a palimpsest glacial geological and geomorphological signature characteristic of multi-phase ice flow and ice-marginal fluctuations. Despite its influential position at the heart of the British-Irish Ice Sheet, sourced from major ice dispersal centres of the northern Pennines, Lake District and Southern Uplands, and drained via fast-flowing outlets such as the Irish Sea Ice Stream, the region remains poorly constrained, both temporally and in terms of ice-flow dynamics. The principle goal of this thesis was therefore to reconstruct the palaeoglaciology of the central sector of the British-Irish Ice Sheet during the last glacial cycle, focusing on: (1) ice-flow dynamics with respect to palaeo-ice divides, ice-dispersal centres, flow trajectories and flow phasing; (2) the relative chronology of ice flows during advance and decay of the ice sheet; and (3) evidence for ice stream activity either within or sourced from the study area.
The thesis adopted a dual approach involving both geomorphological mapping and sedimentological analysis. A 5 m resolution NEXTMap DEM was used to map over 9,000 individual landforms including subglacial lineations, hummocky terrain, moraines, meltwater channels, eskers and glaciofluvial sediment accumulations. Subglacial lineations were subdivided into discrete flow sets demarcating distinctive flow phases, and a relative chronology produced from cross-cutting relationships. Thirteen field sites, concentrated in the Solway Lowlands, supported by data collected from over 200 boreholes enabled detailed stratigraphic and sedimentological analysis to be carried out. This included stratigraphic logging, the collection of macrofabrics, particle size and geochemistry analysis on till matrixes, clast lithological counts, varve analysis and microstructural (thin sections) data.
Results from this study have demonstrated that the central sector of the ice sheet was characterised by repeated ice-flow switches, initiation and termination of ice streams, drawdown into ice streams, repeated ice-marginal fluctuations (the Scottish and Blackhall Wood Re-advances) and the production of large volumes of meltwater, often impounded to form ice-dammed lakes. Six main stages of ice flow have been recognised in the region, of which stage I is thought to indicate the period of maximum ice expansion, while stages II-VI record the deglacial history. A pre-stage I event is also discussed and can be reconciled with the initial expansion of ice out of upland dispersal centres. Stage I was characterised by ice flowing eastwards across the country through major topographic lows of the Stainmore and Tyne gaps. The Tyne Gap was occupied by a topographic ice stream, which was heavily influenced by the changing dominances of both Lake District and Southern Upland ice-dispersal centres. Migration of ice divides back towards upland dispersal centres during stage II resulted in the flow of ice through the Stainmore Gap being cut-off, while the northern edge of the Tyne Gap ice stream was breached by a SE ice flow down the N Tyne Valley. Despite the maintenance of the Irish Sea Ice Stream off the western coast of Cumbria throughout stage III, the Tyne Gap and Solway Lowlands underwent widespread deglaciation. Meltwater from the Tyne Gap was routed into Glacial-Lake Wear via a major proglacial drainage network in the South Tyne Valley, while the natural basin of the Solway Lowlands also ponded-up (Glacial-Lake Blackhall Wood) as drainage became impeded by the Irish Sea Ice Stream. The overall pattern of retreat was reversed during the Blackhall Wood Re-advance (stage IV), during which ice was vigorously drawn down into the Irish Sea Ice Stream. Stage V was characterised by the continued retreat of ice out of the central sector of the British-Irish Ice Sheet; with the vast amounts of meltwater generated impounded in ice-marginal lake systems (Glacial-Lake Carlisle), or routed through meltwater channel networks or evolving glacier karst (Brampton kame belt). The landforms of the Brampton kame belt can be reconciled with ice stagnation on the reverse slope of the Tyne Gap, and is thought to have formed one component of a much larger, time-transgressive drainage network involving the Pennine escarpment and Tyne Gap meltwater channel systems. The final recognised stage in the glacial history of the region was the Scottish Re-advance, a brief incursion of ice, sourced from the Southern Uplands, onto the fringe of the Solway Lowlands. A large glacial lake is identified to have formed at the ice front, dammed against ice in the Irish Sea basin and delimited by a large deltaic complex at Holme St. Cuthbert
Contract enforcement and Argentina's long-run decline
Get PDFArgentina has slipped from being among the ten richest countries in the world by the eve of World War I to its current position close to developing countries. Why did Argentina fall behind? In this paper we employ a structural model to investigate the extent to which contract enforcement, as captured by Clague, Keefer, Knack, and Olson's "Contract Intensive Money", conditioned broad capital accumulation and economic growth in Argentina and, consequently, the country's relative international position. Our results suggest that poor contract enforcement played a major role in Argentina's unique experience of long-run economic decline
Writing and the rights of reality: usurpation and potentiality in Derrida, Plato, Nietzsche, and Beckett
Get PDFThe thesis critically evaluates Jacques Derrida's conferral of the rights of reality on writing, focussing on his theory of an arche-text in light of the speculative nature of this theory. The theory is initially considered in the context of Derrida's elucidation of the usurpatory status of writing within the Platonic and Nietzschean texts. This consideration reveals an admission of writing's usurpatory status by both writers while at the same time demonstrating their awareness of the intrinsically speculative nature of this view, the significance of writing lying in its ability to exteriorise the radically indeterminate status of consciousness m relation to reality rather than its ability to displace consciousness or reality The analyses, therefore, not only bring the Derridean hypothesis of a repressive or phonocentric metaphysical episteme into question but also exhibit the historical and philosophical role of potentiality in relation to writing, writing's ultimate significance lying in its capacity to exteriorise our existence as a mode of potentiality. Accordingly, in the second half of the thesis the Derridean theory of writing is countered with a specifically Aristotelian theory of the text as it is exhibited in the prose of Samuel Beckett, an author whose significance lies in his close alignment with Derridean theory within contemporary criticism. It is demonstrated that this identification has obviated an awareness of the significance of potentiality within the Beckettian text, his work consequently being appraised in the previously neglected context of Aristotelian metaphysics
Elementa Anglicana [electronic resource] : or, the principles of English grammar displayed and exemplified, ... In two volumes. By Peter Walkden Fogg.
No full textPp.135-249 of vol.2 were reprinted in 1796 with new preliminaries as the author's 'Dissertations grammatical and philological'.Alston,Electronic reproduction.English Short Title Catalog,Reproduction of original from Harvard University Graduate School of Education Gutman
Molecular genetic investigations identify new clinical phenotypes associated with BCS1L-related mitochondrial disease
Get PDF\ua9 The Author(s) 2019. Published by Oxford University Press.BCS1L encodes a homolog of the Saccharomyces cerevisiae bcs1 protein, which has a known role in the assembly of Complex III of the mitochondrial respiratory chain. Phenotypes reported in association with pathogenic BCS1L variants include growth retardation, aminoaciduria, cholestasis, iron overload, lactic acidosis and early death (GRACILE syndrome), and Bj\uf6rnstad syndrome, characterized by abnormal flattening and twisting of hair shafts (pili torti) and hearing problems. Here we describe two patients harbouring biallelic variants in BCS1L; the first with a heterozygous variant c.166C>T, p.(Arg56*) together with a novel heterozygous variant c.205C>T, p.(Arg69Cys) and a second patient with a novel homozygous c.325C>T, p.(Arg109Trp) variant. The two patients presented with different phenotypes; the first patient presented as an adult with aminoaciduria, seizures, bilateral sensorineural deafness and learning difficulties. The second patient was an infant who presented with a classical GRACILE syndrome leading to death at 4 months of age. A decrease in BCS1L protein levels was seen in both patients, and biochemical analysis of Complex III revealed normal respiratory chain enzyme activities in the muscle of both patients. A decrease in Complex III assembly was detected in the adult patient\u27s muscle, whilst the paediatric patient displayed a combined mitochondrial respiratory chain defect in cultured fibroblasts. Yeast complementation studies indicate that the two missense variants, c.205C>T, p.(Arg69Cys) and c.325C>T, p.(Arg109Trp), impair the respiratory capacity of the cell. Together, these data support the pathogenicity of the novel BCS1L variants identified in our patients
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