74,617 research outputs found
Morgan, G R, NX47505
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/406065Surname: MORGAN. Given Name(s) or Initials: G R. Military Service Number or Last Known Location: NX47505. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 23526.246971
Item: [2016.0049.38342] "Morgan, G R, NX47505
Morgan, G R, 216865
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/406024Surname: MORGAN. Given Name(s) or Initials: G R. Military Service Number or Last Known Location: 216865. Missing, Wounded and Prisoner of War Enquiry Card Index Number: SEA-2649.246930
Item: [2016.0049.38301] "Morgan, G R, 216865
Morgan, G R, TX5347
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/406082Surname: MORGAN. Given Name(s) or Initials: G R. Military Service Number or Last Known Location: TX5347. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 31320.246988
Item: [2016.0049.38359] "Morgan, G R, TX5347
Driggs, Howard R. P.2
No full textAvard Fairbanks, sculptor, shaking hand of Howard R. Driggs whose bust he just finished. Nicholas G. Morgan, sponsor, donor
G. Russell Morgan of the Old Guard
No full textA man identified as G. Russell Morgan, Class of 1919. He was a member of the Old Guard, and is shown at an alumni gathering talking to another Old Guard member.[back] R- G. Russell Morgan '1
The dielectrophoretic and travelling wave forces for interdigitated electrode arrays: analytical solution using Fourier series
No full textIn alternating current electrokinetics, electric fields are used to generate forces on particles. Techniques have been applied for the manipulation of particles and the measurement of their dielectric properties. The fields are typically generated by microelectrode structures fabricated on planar surfaces. One particular design, using interdigitated bar electrodes, is used both in dielectrophoretic field flow fractionation and travelling wave dielectrophoresis. This paper presents a Fourier series analysis of the dielectrophoretic force on a particle generated by this type of electrode array, for both dielectrophoresis and travelling wave dielectrophoresis. Simple expressions are derived for the force at a distance of the order of the electrode spacing from the electrodes. A full analytical expression is given for the dielectrophoretic force in two dimensions. Comparisons are made with previously published experimental observations
Electrohydrodynamics and dielectrophoresis in microsystems: scaling laws
No full textThe movement and behaviour of particles suspended in aqueous solutions subjected to non-uniform ac electric fields is examined. The ac electric fields induce movement of polarizable particles, a phenomenon known as dielectrophoresis. The high strength electric fields that are often used in separation systems can give rise to fluid motion, which in turn results in a viscous drag on the particle. The electric field generates heat, leading to volume forces in the liquid. Gradients in conductivity and permittivity give rise to electrothermal forces and gradients in mass density to buoyancy. In addition, non-uniform ac electric fields produce forces on the induced charges in the diffuse double layer on the electrodes. This causes a steady fluid motion termed ac electro-osmosis. The effects of Brownian motion are also discussed in this context. The orders of magnitude of the various forces experienced by a particle in a model microelectrode system are estimated. The results are discussed in relation to experiments and the relative influence of each type of force is described
Twentieth-century poetry and science : science in the poetry of Hugh MacDiarmid, Judith Wright, Edwin Morgan, and Miroslav Holub
No full textThe aim of this thesis is to arrive at a characterisation of twentieth century poetry and science by means of a detailed study of the work of four poets who engaged extensively with science and whose writing lives spanned the greater part of the period. The study of science in the work of the four chosen poets, Hugh MacDiarmid (1892 – 1978), Judith Wright (1915 – 2000), Edwin Morgan (1920 – 2010), and Miroslav Holub (1923 – 1998), is preceded by a literature survey and an initial theoretical chapter. This initial part of the thesis outlines the interdisciplinary history of the academic subject of poetry and science, addressing, amongst other things, the challenges presented by the episodes known as the ‘two cultures’ and the ‘science wars’. Seeking to offer a perspective on poetry and science more aligned to scientific materialism than is typical in the interdiscipline, a systemic challenge to Thomas Kuhn’s The Structure of Scientific Revolutions (1962) is put forward in the first chapter. Additionally, the founding work of poetry and science, I. A. Richards’s Science and Poetry (1926), is assessed both in the context in which it was written, and from a contemporary viewpoint; and, as one way to understand science in poetry, a theory of the creative misreading of science is developed, loosely based on Harold Bloom’s The Anxiety of Influence (1973). The detailed study of science in poetry commences in Chapter II with Hugh MacDiarmid’s late work in English, dating from his period on the Shetland Island of Whalsay (1933 – 1941). The thesis in this chapter is that this work can be seen as a radical integration of poetry and science; this concept is considered in a variety of ways including through a computational model, originally suggested by Robert Crawford. The Australian poet Judith Wright, the subject of Chapter III, is less well known to poetry and science, but a detailed engagement with physics can be identified, including her use of four-dimensional imagery, which has considerable support from background evidence. Biology in her poetry is also studied in the light of recent work by John Holmes. In Chapter IV, science in the poetry of Edwin Morgan is discussed in terms of its origin and development, from the perspective of the mythologised science in his science fiction poetry, and from the ‘hard’ technological perspective of his computer poems. Morgan’s work is cast in relief by readings which are against the grain of some but not all of his published comments. The thesis rounds on its theme of materialism with the fifth and final chapter which studies the work of Miroslav Holub, a poet and practising scientist in communist-era Prague. Holub’s work, it is argued, represents a rare and important literary expression of scientific materialism. The focus on materialism in the thesis is not mechanistic, nor exclusive of the domain of the imagination; instead it frames the contrast between the original science and the transformed poetic version. The thesis is drawn together in a short conclusion
On-chip high-speed sorting of micron-sized particles for high-throughput analysis
No full textA new design of particle sorting chip is presented. The device employs a dielectrophoretic gate that deflects particles into one of two microfluidic channels at high speed. The device operates by focussing particles into the central streamline of the main flow channel using dielectrophoretic focussing. At the sorting junction (T- or Y-junction) two sets of electrodes produce a small dielectrophoretic force that pushes the particle into one or other of the outlet channels, where they are carried under the pressure-driven fluid flow to the outlet. For a 40mm wide and high channel, it is shown that 6micron diameter particles can be deflected at a rate of 300particles/s. The principle of a fully automated sorting device is demonstrated by separating fluorescent from non-fluorescent latex beads
Quantifying dielectrophoretic collections of sub-micron particles on microelectrodes
No full textThis paper presents a technique for measuring and quantifying the elelectrohporetic collection of sub-micron particles on planar microelectrode arrays. Fluorescence microscopy and video recording is used to measure the number of particles collecting on an electrode as a function of time for various experimental parameters, such as applied electrode voltage and frequency. Video images are processed using analytical methods that take advantage of the geometrical properties of the electrode array to extract quantitative information which is used to characterize the dielectric properties of particles. The time-dependent collection profiles can be chracterized by three parameters: the initial dielectrophoretic collection rate, the initial to pseudo-steady-state transition and the rise time. This method can be used asa general technique to characterize the dielectrophoretic properties of populations of sub-micron-scale particles
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