147 research outputs found
Virgil, "Aeneid" 6 : A Commentary /
No full textWorking "in the shadow of Eduard Norden" in the author’s own words, Nicholas Horsfall has written his own monumental commentary on Aeneid 6. This is Horsfall’s fifth large-scale commentary on the Aeneid, and as his earlier commentaries on books 7, 11, 3, and 2, this is not a commentary aimed at undergraduates. Horsfall is a commentators’ commentator writing with encyclopedic command of Virgilian scholarship for the most demanding reader. Volume One includes the introduction, text and translation, and bibliography,Volume Two includes the commentary, appendices, and indices.Working "in the shadow of Eduard Norden" in the author’s own words, Nicholas Horsfall has written his own monumental commentary on Aeneid 6. This is Horsfall’s fifth large-scale commentary on the Aeneid, and as his earlier commentaries on books 7, 11, 3, and 2, this is not a commentary aimed at undergraduates. Horsfall is a commentators’ commentator writing with encyclopedic command of Virgilian scholarship for the most demanding reader. Volume One includes the introduction, text and translation, and bibliography,Volume Two includes the commentary, appendices, and indices.Electronic reproduction.Mode of access: Internet via World Wide Web.N.Horsfall, Dalnacroich.Description based on online resource; title from PDF title page (publisher’s Web site, viewed March 24, 2015
Electrical and magnetic properties of II-VI diluted magnetic semiconductors
No full textThe electrical and magnetic properties of MOVPE grown epitaxial layers of Hg(_1-x)Mn(_x)Te layers has been investigated using a number of techniques. The samples have been grown by the Inter Diffused Multilayer Process, (IMP) on (100) semi insulating GaAs substrates with ZnTe and CdTe buffer layers. The samples have been shown to show a number of phenomena nopt observed in the bulk material, such as an anomaly in the resistivity, rnagnetoresistance related to the intrinsic magnetism of the material, and saturation of the room temperature magnetisation. In general the samples are of a highly compensated nature with the value of |R(_H)e|(^-1) varying between l0(^14) and 5xI0(^17) cm(^-3) at 20K, the Hall mobilities varying between 8 and 3.5x10(^5) cm(^2)V(^-1)s(^-1) at 20K. Magnetically, the samples generally show a paramagnetic signal that is swamped by the diamagnetic background of the substrate and buffer layers. The paramagnetisrn can be well modelled using a Curie Weiss fit. A number of the samples show a saturation in the magnetisation, which, has been explained via the use of vacancy ordering within MnTe regions in the sample. The susceptibility of the samples has been investigated using a Faraday balance system, and this data has been fitted using; a cluster model for Mn ions within the sample. The photomagnetisation of Cd(_0.9)Mn(_0.1)Te:In has been investigated using a faraday balance system, and modelled using the work of Dietl and Sample, to calculate the number of polarons that had formed on donors in the sample, ΔN(_D)(^MAG) = 1.28x10(^15)cm(^-3). The number of donors in the sample has been measured by means of the Hall effect, ΔN(_D)(^ELEC) = 1.92x10(^15)cm(^-3), and this value compared to that obtained from the model. We have proposed a model to explain this discrepancy based on the concept of band tails in the impurity band
Autobiography of Captain John Hodgson : of Coley Hall, near Halifax; his conduct in the Civil Wars, and his troubles after the Restoration /
No full textIncludes indexesContains facsim. of original t.p. of his "Memoirs."Bibliography: p. [83-84]Mode of access: Internet
Discorder: Shindig & The year in local music - January '85
No full textFeaturing Jim Cummings (bass); Andy Graffiti (drums); "Jazzmanian Devils"; "Bolero Lava"; "Rhythm Mission"; "Beverly Sisters"; Janet Brown (piano, flute); Charlotte Kennedy (vox); "Paul Plimley Octet"; Graham Ord (as); Paul Plimley (piano, vibes); Coat Cooke (ts); "Psychoschizoid"; "My Three Sons"; Jay O'Keefe (bass); Scruff (guitar); Eric Smith (drums); Steve Richards (vox); Jody MacDonald (bkg. vox); Angela Horsfall (bkg. vox); Rabrice Rauhue (guitar); Dennis Mills (vox, as); Warren Ash (drums); Warren Hunter (bass); Scott Harding (guitar); Lee Kelsey (keyboard); Brian Harding (tb); Finn Manniche (cello
Transient Skin Effect in Power Electronic Applications
No full textThis study describes transient electromagnetic phenomena in electrical conductors that are connected to modern power electronic circuits and therefore subjected to current controlled pulses with fast rise times and high peak current ratings. Electromagnetic field diffusion is discussed and a brief review of alternating current skin effect phenomena is presented before it is generalised to transient regimes of operation. It is shown that the magnetic field diffuses into the conductor from the outside on the initiation of a current pulse and therefore the axial current density distribution inside the conductor changes with time under a transient current due to the well-known electromagnetic relations – the current begins at the conductor surface and diffuses inwards. The implications of such behaviour are briefly discussed in the context of modern power electronics and its applications
High linearity silicon carbide detectors for medical applications
No full textSilicon carbide is well known as a radiation hard
semiconductor, that has been demonstrated in a range of detector
structures for deployment in application where the ability to
tolerate high radiation dose is imperative. This includes applications in space and nuclear environments, where the ability
to detect highly energetic radiation is important. In contrast,
medical treatment uses a range of radiation dose rates and
energies and here we investigate the response and linearity of a
highly radiation tolerant detector fabricated using silicon carbide
to dose rates in the range of 0.185mGy.min−1. This dose rate
is typical of those used for medical imaging purposes, rather
than radiotherapy treatment. The data show that the generated
current originates within the depletion region of the detector and
that the response is linearly dependent on the volume of the space
charge region. The realization of a vertical detector structure,
coupled with the high quality of epitaxial layers, has resulted in
a linearity and sensitivity of the detector that are significantly
higher than those published previously for moderate dose rate
testing
Self-powered X-Ray Sensors for Extreme Environments
No full textThe ability to remotely monitor the radiation dose
in environments where the radiation dose rate precludes the use
of conventional technology offers a step change in capability.
Through the use of wide band gap semiconductor materials, we
show that it is possible to develop a self-powered system that
harvests energy from the X-ray photon flux in the environment.
This opens up the possibility of developing high power
radioisotope micro batteries, where the dose encountered by the
power conversion electronics is beyond the limitations of siliconbased systems
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