3,003 research outputs found
The role of Violence and Death in Children’s Adaptations of Beowulf from 1910-1968
ABSTRACT
The role of Violence and Death in Children’s Adaptations of Beowulf from 1908-1968
Erin E. Simoni
Department of English
Texas A&M University
Research Advisor: Dr. Britt Mize
Department of English
This thesis explores the portrayal of death and violence in children’s adaptations of Beowulf through the progression and trends of death and violence in children’s Beowulf adaptations from 1908-1968. The texts chosen from these times are considered well known and were published in both the United States and United Kingdom. Extensive study has been done on death and violence in children’s literature, however the study of death and violence in children’s literature has not yet discussed the adaptations of Beowulf from 1908-1968. This study is interested in the socialization of children regarding death, the cultural values communicated concerning death and dying, and the virtues portrayed through the deaths and violence in Beowulf. I am fascinated in analyzing the violence of these texts surrounding the multiple deaths of Beowulf and contrasting and comparing the deaths of major characters such as Grendel, Grendel’s Mother, and Beowulf with the deaths of fringe characters such as Aeschere, Honscio/Hondscio, and the thirty thanes. Death and violence are classified as deemphasized as in the purposeful downplaying of existing violence and death in Beowulf in the text or images, and emphasized in reference to the existing violence and death in Beowulf being highlighted explicitly through text and images. When reasons are given for why the emphasized violence or death is fitting, this will be called legitimization and will be especially noted
A superconducting absolute spin valve
A superconductor with a spin-split excitation spectrum behaves as an ideal
ferromagnetic spin-injector in a tunneling junction. It was theoretical
predicted that the combination of two such spin-split superconductors with
independently tunable magnetizations, may be used as an ideal
spin-valve. Here we report on the first switchable superconducting spin-valve
based on two EuS/Al bilayers coupled through an aluminum oxide tunnel barrier.
The spin-valve shows a relative resistance change between the parallel and
antiparallel configuration of the EuS layers up to 900% that demonstrates a
highly spin-polarized currents through the junction. Our device may be pivotal
for realization of thermoelectric radiation detectors, logical element for a
memory cell in cryogenics superconductor-based computers and superconducting
spintronics in general.Comment: 6 pages, 4 color figures, 1 tabl
A tomographic setting for quasi-distribution functions
The method of constructing the tomographic probability distributions
describing quantum states in parallel with density operators is presented.
Known examples of Husimi-Kano quasi-distribution and photon number tomography
are reconsidered in the new setting. New tomographic schemes based on coherent
states and nonlinear coherent states of deformed oscillators, including
q-oscillators, are suggested. The associated identity decompositions providing
Gram-Schmidt operators are explicitly given, and contact with the Agarwal-Wolf
-operator ordering theory is made.Comment: A slightly enlarged version in which contact with the Agarwal-Wolf
-operator ordering theory is mad
Co-digestion of macroalgae for biogas production: an LCA-based environmental evaluation
Algae represent a favourable and potentially sustainable source of biomass for bioenergy-based industrial pathways in the future.
The study, performed on a real pilot plant implemented in Augusta (Italy) within the frame of the BioWALK4Biofuels project,
aims to figure out whether seaweed (macroalgae) cultivated in near-shore open ponds could be considered a beneficial aspect as a
source of biomass for biogas production within the co-digestion with local agricultural biological waste. The LCA results
confirm that the analysed A and B scenarios (namely the algae-based co-digestion scenario and agricultural mix feedstock
scenario) present an environmental performance more favourable than that achieved with conventional non-renewable-based
technologies (specifically natural gas - Scenario C). Results show that the use of seaweed (Scenario A) represent a feasible
solution in order to replace classical biomass used for biofuel production from a land-based feedstock. The improvement of the
environmental performances is quantifiable on 10% respect to Scenario B, and 38 times higher than Scenario
Analysis of the absorption and emission spectra of U4+ in α-ThBr 4
The low temperature form α-ThBr4 has a scheelite structure I41/a in which the tetravalent uranium occupies the thorium site which is S4. Assuming that the ground state remains Γ 4 as in the β-ThBr4 form, the polarized absorption spectrum at 4.2 K shows that D2d is a good approximation. A peculiarity of this host is the exaltation of very numerous fluorescences of U4+ which permit to assign four Stark levels of the ground state 3H4 : Γ5 at 110 cm-1, Γ 1 at 473 cm-1, Γ1 at 623 cm-1 and Γ5 at 830 cm-1. 30 levels have been assigned and the crystal field parameters of U4+ (5f2) have been calculated in the D2d approximation : B20 = - 382, B40 = - 3 262, B44 = - 1734, B60 = - 851 and B64 = - 1828 cm-1. It is interesting to note that a small distortion in the scheelite structure of the α-ThBr4 compared with the zircon structure β-ThBr4 induces important changes in the crystal field parameters
Revealing the magnetic proximity effect in EuS/Al bilayers through superconducting tunneling spectroscopy
A ferromagnetic insulator attached to a superconductor is known to induce an
exchange splitting of the Bardeen-Cooper-Schrieffer (BCS) singularity by a
magnitude proportional to the magnetization, and penetrating into the
superconductor to a depth comparable with the superconducting coherence length.
We study this long-range magnetic proximity effect in EuS/Al bilayers and find
that the exchange splitting of the BCS peaks is present already in the
unpolarized state of the ferromagnetic insulator (EuS), and is being further
enhanced when magnetizing the sample by a magnetic field. The measurement data
taken at the lowest temperatures feature a high contrast which has allowed us
to relate the line shape of the split BCS conductance peaks to the
characteristic magnetic domain structure of the EuS layer in the unpolarized
state. These results pave the way to engineering triplet superconducting
correlations at domain walls in EuS/Al bilayers. Furthermore, the hard gap and
clear splitting observed in our tunneling spectroscopy measurements indicate
that EuS/Al bilayers are excellent candidates for substituting strong magnetic
fields in experiments studying Majorana bound states.Comment: 9 pages, 4 color figure
Surface-acoustic-wave driven planar light-emitting device
Electroluminescence emission controlled by means of surface acoustic waves
(SAWs) in planar light-emitting diodes (pLEDs) is demonstrated. Interdigital
transducers for SAW generation were integrated onto pLEDs fabricated following
the scheme which we have recently developed. Current-voltage, light-voltage and
photoluminescence characteristics are presented at cryogenic temperatures. We
argue that this scheme represents a valuable building block for advanced
optoelectronic architectures
Anti-bunched photons from a lateral light-emitting diode
We demonstrate anti-bunched emission from a lateral-light emitting diode.
Sub-Poissonian emission statistic, with a g(0)=0.7, is achieved at
cryogenic temperature in the pulsed low-current regime, by exploiting electron
injection through shallow impurities located in the diode depletion region.
Thanks to its simple fabrication scheme and to its modulation bandwidth in the
GHz range, we believe our devices are an appealing substitute for
highly-attenuated lasers in existing quantum-key-distribution systems. Our
devices outperform strongly-attenuated lasers in terms of multi-photon emission
events and can therefore lead to a significant security improvement in existing
quantum key distribution systems
Parametrization of 5f-5f Transition Probabilities Between Stark Levels of U 3+ in LiYF4
In order to simulate intensities of the 5f-5f transitions of U3+ in LiYF4, we applied the Judd-Ofelt theory. Because of the large crystal-field splitting of the J-multiplets in the actinides, a set of phenomenological intensity parameters Bλkq is introduced to describe the transition probabilities between the crystal-field sublevels of U3+. The intensities of the absorption transitions between the crystal field levels calculated and a set of six phenomenological intensity parameters give a rather good simulation of the experimental intensities, and the applicability of the Judd-Ofelt theory is discussed for the 5f→ 5f transitions of the actinides. From these values, the oscillator strengths between the excited states involved in the laser transition 4I11/2→4I9/2 are calculated and the corresponding radiative lifetime is compared to the experimental one. Moreover, a comparison between the actinide ion U3+ (5f3) and the lanthanide ions Nd3+ (4f3) and Er3+ (4f11) in LiYF4 is made
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