897 research outputs found
Chiral pumping effect induced by rotating electric fields
We propose an experimental setup using 3D Dirac semimetals to access a novel
phenomenon induced by the chiral anomaly. We show that the combination of a
magnetic field and a circularly polarized laser induces a finite charge density
with an accompanying axial current. This is because the circularly polarized
laser breaks time-reversal symmetry and the Dirac point splits into two Weyl
points, which results in an axial-vector field. We elucidate the appearance of
the axial-vector field with the help of the Floquet theory by deriving an
effective Hamiltonian for high-frequency electric fields. This anomalous charge
density, i.e. the chiral pumping effect, is a phenomenon reminiscent of the
chiral magnetic effect with a chiral chemical potential. We explicitly compute
the pumped density and the axial-current expectation value. We also take
account of coupling to the chiral magnetic effect to calculate a balanced
distribution of charge and chirality in a material that behaves as a chiral
battery.Comment: 6 pages, 3 figures; a new section added to discuss coupling of the
CPE and the CME, a wrong sign corrected, typos fixed, elaborated for better
readabilit
1-[(2-Methyl-8-quinolยญyl)aminoยญmethylยญene]naphthalen-2(1H)-one
The molยญecule of the title compound, C21H16N2O, exists in the keto form and the C=O and NโH bonds are mutually cis in the crystal structure, although an enol form would be possible through tautomerism. The dihedral angle between the quinoline and the naphthalene systems is 22.04โ
(2)ยฐ. A bifurcated intramolecular NโHโฏ(O,N) hydrogen bond is present
Degradable and Nanosegregated Elastomers with Multiblock Sequences of Biobased Aromatic Mesogens and Biofunctional Aliphatic Oligocarbonates
We have developed multiblock aromatic/aliphatic condensation polymers, comprising side-chain biofunctionalized aliphatic oligocarbonates and biobased aromatic ester triad mesogens up to 17 wt %. Nanosegregation of the aromatic mesogen-rich domains with diameters of approximately 10 nm from the soft aliphatic polymer matrix is suggested by atomic force microscopy. The polymers exhibit rubberlike properties, unlike the corresponding aliphatic polycarbonate forming viscous liquid. These properties support the interchain interactions between the aromatic mesogens, which can serve as physical cross-linking. The aromatic ester triad mesogens in the multiblock polymers significantly bolster the tolerance to organocatalytic hydrolysis and methanolysis of the polymer chains but are eventually degraded. The multiblock polymers show degradation behavior slightly faster than poly(L-lactide), whereas poly(ethylene terephthalate) remains intact under the same condition. The present study demonstrates the efficacy of aromatic ester triad mesogens incorporated into the sequences of biodegradable aliphatic polycarbonates to enhance their physical properties while retaining degradability
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Development of Circulating Support Environment of Multilingual Medical Communication using Parallel Texts for Foreign Patients
The need for multilingual communication in Japan has
increased due to an increase in the number of foreigners in the
country. When people communicate in their nonnative language,
the differences in language prevent mutual understanding among
the communicating individuals. In the medical field, communication
between the hospital staff and patients is a serious problem. Currently,
medical translators accompany patients to medical care facilities, and
the demand for medical translators is increasing. However, medical
translators cannot necessarily provide support, especially in cases in
which round-the-clock support is required or in case of emergencies.
The medical field has high expectations from information technology.
Hence, a system that supports accurate multilingual communication is
required. Despite recent advances in machine translation technology,
it is very difficult to obtain highly accurate translations. We have
developed a support system called M3 for multilingual medical
reception. M3 provides support functions that aid foreign patients in
the following respects: conversation, questionnaires, reception procedures,
and hospital navigation; it also has a Q&A function. Users
can operate M3 using a touch screen and receive text-based support.
In addition, M3 uses accurate translation tools called parallel texts
to facilitate reliable communication through conversations between
the hospital staff and the patients. However, if there is no parallel
text that expresses what users want to communicate, the users cannot
communicate. In this study, we have developed a circulating support
environment for multilingual medical communication using parallel
texts. The proposed environment can circulate necessary parallel texts
through the following procedure: (1) a user provides feedback about
the necessary parallel texts, following which (2) these parallel texts
are created and evaluated
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