79,674 research outputs found
A Comparison of Different Machine Transliteration Models
Machine transliteration is a method for automatically converting words in one
language into phonetically equivalent ones in another language. Machine
transliteration plays an important role in natural language applications such
as information retrieval and machine translation, especially for handling
proper nouns and technical terms. Four machine transliteration models --
grapheme-based transliteration model, phoneme-based transliteration model,
hybrid transliteration model, and correspondence-based transliteration model --
have been proposed by several researchers. To date, however, there has been
little research on a framework in which multiple transliteration models can
operate simultaneously. Furthermore, there has been no comparison of the four
models within the same framework and using the same data. We addressed these
problems by 1) modeling the four models within the same framework, 2) comparing
them under the same conditions, and 3) developing a way to improve machine
transliteration through this comparison. Our comparison showed that the hybrid
and correspondence-based models were the most effective and that the four
models can be used in a complementary manner to improve machine transliteration
performance
Lower bounds to energy eigenvalues for the stark effect in a rigid rotator
Lower bounds to energy eigenvalues for rigid rotator in electric field Stark effect calculation - Schroedinger equatio
Critical currents for vortex defect motion in superconducting arrays
We study numerically the motion of vortices in two-dimensional arrays of
resistively shunted Josephson junctions. An extra vortex is created in the
ground states by introducing novel boundary conditions and made mobile by
applying external currents. We then measure critical currents and the
corresponding pinning energy barriers to vortex motion, which in the
unfrustrated case agree well with previous theoretical and experimental
findings. In the fully frustrated case our results also give good agreement
with experimental ones, in sharp contrast with the existing theoretical
prediction. A physical explanation is provided in relation with the vortex
motion observed in simulations.Comment: To appear in Physical Review
Acoustic Spectroscopy of Superfluid 3He in Aerogel
We have designed an experiment to study the role of global anisotropic
quasiparticle scattering on the dirty aerogel superfluid 3He system. We observe
significant regions of two stable phases at temperatures below the superfluid
transition at a pressure of 25 bar for a 98% aerogel.Comment: 2 pages, 2 figures, accepted for publication in proceedings of Low
Temperature Conference 2
Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling
Heralded entanglement between collective excitations in two atomic ensembles
is probabilistically generated, stored, and converted to single photon fields.
By way of the concurrence, quantitative characterizations are reported for the
scaling behavior of entanglement with excitation probability and for the
temporal dynamics of various correlations resulting in the decay of
entanglement. A lower bound of the concurrence for the collective atomic state
of 0.9\pm 0.3 is inferred. The decay of entanglement as a function of storage
time is also observed, and related to the local dynamics.Comment: 4 page
Defect Motion and Lattice Pinning Barrier in Josephson-Junction Ladders
We study motion of domain wall defects in a fully frustrated
Josephson-unction ladder system, driven by small applied currents. For small
system sizes, the energy barrier E_B to the defect motion is computed
analytically via symmetry and topological considerations. More generally, we
perform numerical simulations directly on the equations of motion, based on the
resistively-shunted junction model, to study the dynamics of defects, varying
the system size. Coherent motion of domain walls is observed for large system
sizes. In the thermodynamical limit, we find E_B=0.1827 in units of the
Josephson coupling energy.Comment: 7 pages, and to apear in Phys. Rev.
Country Image, Perceived Product Quality and Purchase Intention: the Moderating Roles of Quality Warranty Certificate and Country-Image Transferred Strategies
This article aims at researching on the relationship of country image and customer perception on product quality and purchasing intention in South Korean. Additionally, the moderating roles of product quality warranty and country image transferred strategies are also taken into investigation in this empirical research. In order to make a research on these areas, questionnaire forms were distributed by emails and sending hard copies to 350 target samples in South Korea including Koreans and foreigners who have been living in South Korea and 215 forms were returned back and analyzed by SPSS v.21. The results indicated that gender, age groups and nationalities can significantly influence consumers' perception on the relationship country image and product quality. Surprisingly, the image of origin country produced products does not really affect consumers' perceived product quality, but the image of manufacturing country has a strong and significant influence on consumers' perception in terms of product quality. More interestingly, country image transferred strategy is ineffective in altering consumers' psychological perceptions on country image and perceived product quality. Apart from this, product quality warranty is still workable for boosting consumers' confidence in consuming products in Korean context. Even though this empirical research was considerably and carefully implemented, there are still some significant limitations in practice. The limitations and suggestion are finally introduced and explained
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