2,122 research outputs found
On the Narrative Features of British Sitcoms: Take The IT Crowd and Yes, Prime Minister as Examples
In recent years, British TV dramas have been a glaring phenomenon and the “new favorite” of fans who love watching overseas TV plays. This paper takes two TV dramas of The IT Crowd and Yes, Prime Minister for case studies, explores the narrative features of British sitcom from dramatic narrative tendency, core narration of “people”, self-deprecating humor, unity of conflict and social significance, concludes three points of inspiration for China’s film and television creation: “learn” instead of “imitate”, “serious” instead of “funny”, “modern” as well as “traditional.”
Diaquatetrakis(1,3-di-4-pyridylpropane-κN)manganese(II) bis(perchlorate) sesquihydrate
In the title complex, [Mn(C13H14N2)4(H2O)2](ClO4)2·1.5H2O, the MnII ion is coordinated by four N atoms from four different 1,3-di-4-pyridylpropane molecules and two O atoms from two coordinated water molecules, leading to a distorted MnN4O2 octahedral geometry. Each 1,3-di-4-pyridylpropane ligand displays a monodentate coordinating mode. In the crystal, there exist O—H⋯O, O—H⋯N and C—H⋯O hydrogen bonds. The perchlorate anions and the coordinated and lattice water molecules play an important role in the formation of these hydrogen bonds. One of the two lattice water molecules shows half-occupancy
Quantum electrodynamics in a whispering-gallery microcavity coated with a polymer nanolayer
Quasi-transverse-electric and -transverse-magnetic fundamental whispering
gallery modes in a polymer-coated silica microtoroid are theoretically
investigated and demonstrated to possess very high-quality factors. The
existence of a nanometer-thickness layer not only evidently reduces the cavity
mode volume but also draws the maximal electric field's position of the mode to
the outside of the silica toroid, where single quantum dots or nanocrystals are
located. Both effects result in a strongly enhanced coherent interaction
between a single dipole (for example, a single defect center in a diamond
crystal) and the quantized cavity mode. Since the coated microtoroid is highly
feasible and robust in experiments, it may offer an excellent platform to study
strong-coupling cavity quantum electrodynamics, quantum information, and
quantum computation
Content-Aware Quantization Index Modulation:Leveraging Data Statistics for Enhanced Image Watermarking
Image watermarking techniques have continuously evolved to address new
challenges and incorporate advanced features. The advent of data-driven
approaches has enabled the processing and analysis of large volumes of data,
extracting valuable insights and patterns. In this paper, we propose two
content-aware quantization index modulation (QIM) algorithms: Content-Aware QIM
(CA-QIM) and Content-Aware Minimum Distortion QIM (CAMD-QIM). These algorithms
aim to improve the embedding distortion of QIM-based watermarking schemes by
considering the statistics of the cover signal vectors and messages. CA-QIM
introduces a canonical labeling approach, where the closest coset to each cover
vector is determined during the embedding process. An adjacency matrix is
constructed to capture the relationships between the cover vectors and
messages. CAMD-QIM extends the concept of minimum distortion (MD) principle to
content-aware QIM. Instead of quantizing the carriers to lattice points,
CAMD-QIM quantizes them to close points in the correct decoding region.
Canonical labeling is also employed in CAMD-QIM to enhance its performance.
Simulation results demonstrate the effectiveness of CA-QIM and CAMD-QIM in
reducing embedding distortion compared to traditional QIM. The combination of
canonical labeling and the minimum distortion principle proves to be powerful,
minimizing the need for changes to most cover vectors/carriers. These
content-aware QIM algorithms provide improved performance and robustness for
watermarking applications.Comment: 12 pages, 10 figure
(E)-N′-(4-Nitrobenzylidene)-4-(8-quinolyloxy)butanohydrazide
In the title compound, C20H18N4O4, conformation along the bond sequence linking the benzene and quinoline rings, which have a mean interplanar dihedral angle of 2.7 (5)°, is trans–(+)gauche–trans–trans–(−)gauche–trans–trans. In the crystal structure, a pair of intermolecular N—H⋯O hydrogen bonds links the molecules into centrosymmetric cyclic R
2
2(8) dimers, which are aggregated via π–π interactions into parallel sheets [quinoline–benzene ring centroid separation = 3.6173 (16)–3.6511 (16) Å]. The sheets are further connected through weak C—H⋯O interactions, giving a supramolecular two-dimensional network
Users Collaborative Mix-Zone to Resist the Query Content and Time Interval Correlation Attacks
In location-based services of continuous query, it is easier than snapshot to confirm whether a location belongs to a particular user, because sole location can be composed into a trajectory by profile correlation. In order to cut off the correlation and disturb the sub-trajectory, an un-detective region called mix-zone was proposed. However, at the time of this writing, the existing algorithms of this type mainly focus on the profiles of ID, passing time, transition probability, mobility patterns as well as road characteristics. In addition, there is still no standard way of coping with attacks of correlating each location by mining out query content and time interval from the sub-trajectory. To cope with such types of attack, users have to generalize their query contents and time intervals similarity. Hence, this paper first provided an attack model to simulate the adversary correlating the real location with a higher probability of query content and time interval similarity. Then a user collaboration mix-zone (CoMix) that can generalize these two types of profiles is proposed, so as to achieve location privacy. In CoMix, each user shares the common profile set to lowering the probability of success opponents to get the actual position through the correlation of location. Thirdly, entropy is utilized to measure the level of privacy preservation. At last, this paper further verifies the effectiveness and efficiency of the proposed algorithm by experimental evaluations
Radiative viscosity of neutron stars
We study non-linear effects of radiative viscosity of matter in neutron
stars for both direct Urca process and modified Urca process, and find that
non-linear effects will decrease the ratio of radiative viscosity to bulk
viscosity from 1.5 to 0.5 (for direct Urca process) and 0.375 (for modified
Urca process). Which means that for small oscillations of neutron star, the
large fraction of oscillation energy is emitted as neutrinos; but for large
enough ones, bulk viscous dissipation dominates.Comment: 11pages, 4 figure
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