600 research outputs found
The World Wide Web as a vehicle for advertising movies to college students: an exploratory study
The purpose of this study is to explore the World Wide Web as a vehicle for advertising movies to college students. Through a survey of LSU students, this study finds that online promotions as vehicles for advertising movies have great potential. Movie promotion websites are rated the second most effective form of movie advertising after television. The study found that people surf movie promotion websites mainly for movie show times, movie plot and cast information to compare film choices, and movie ticket purchases. The huge amount of data available and the 24/7 access to the internet is an important advantage. However, even though the World Wide Web is a proving an excellent media vehicle for movie advertising, it is still too early to determine whether or not it will supplant TV advertising of movies in the near future
Tunable coupled-mode dispersion compensation and its application to on-chip resonant four-wave mixing
We propose and demonstrate localized mode coupling as a viable dispersion
engineering technique for phase-matched resonant four-wave mixing (FWM). We
demonstrate a dual-cavity resonant structure that employs coupling-induced
frequency splitting at one of three resonances to compensate for cavity
dispersion, enabling phase-matching. Coupling strength is controlled by thermal
tuning of one cavity enabling active control of the resonant
frequency-matching. In a fabricated silicon microresonator, we show an 8 dB
enhancement of seeded FWM efficiency over the non-compensated state. The
measured four-wave mixing has a peak wavelength conversion efficiency of -37.9
dB across a free spectral range (FSR) of 3.334 THz (27 nm). Enabled by
strong counteraction of dispersion, this FSR is, to our knowledge, the largest
in silicon to demonstrate FWM to date. This form of mode-coupling-based, active
dispersion compensation can be beneficial for many FWM-based devices including
wavelength converters, parametric amplifiers, and widely detuned correlated
photon-pair sources. Apart from compensating intrinsic dispersion, the proposed
mechanism can alternatively be utilized in an otherwise dispersionless
resonator to counteract the detuning effect of self- and cross-phase modulation
on the pump resonance during FWM, thereby addressing a fundamental issue in the
performance of light sources such as broadband optical frequency combs
Ultra-low-loss CMOS-Compatible Waveguide Crossing Arrays Based on Multimode Bloch Waves and Imaginary Coupling
We experimentally demonstrate broadband waveguide crossing arrays showing
ultra low loss down to dB/crossing (), matching theory, and
crosstalk suppression over dB, in a CMOS-compatible geometry. The
principle of operation is the tailored excitation of a low-loss spatial Bloch
wave formed by matching the periodicity of the crossing array to the difference
in propagation constants of the 1- and 3-order TE-like
modes of a multimode silicon waveguide. Radiative scattering at the crossing
points acts like a periodic imaginary-permittivity perturbation that couples
two supermodes, which results in imaginary (radiative) propagation-constant
splitting and gives rise to a low-loss, unidirectional breathing Bloch wave.
This type of crossing array provides a robust implementation of a key component
enabling dense photonic integration
Characterization of (H2O)n- clusters using model potential approaches
(H2O)n- clusters have attracted considerable interest since their discovery. Experimentally, three kinds of isomers of (H2O)n- have been identified, but the relationship between the cluster size and the distribution of the excess electron is unknown. The pathways for conversion of the surface- to cavity-bound electron are also controversial. In this thesis, molecular dynamics simulations are applied using a (H2O)n- model introduced by the Jordan group.
It is found that for (H2O)6â, the tweezers structure rapidly evolves to the more stable AA structure, however for book structure the energy barrier is much higher and formation of the AA isomer is not observed on the picosecond time scale
Game analysis of the knowledge sharing mechanism for the supply chain collaborative innovation
Purpose: In information economy era, innovation is the key to improve the competitiveness of
enterprises. The traditional way of enterprise innovation is outdated and supply chain
collaborative innovation has becoming popular. This paper aims to analyze the mechanism of
knowledge sharing between enterprises in supply chain collaborative innovation.
Design/methodology/approach: This paper analyzes the supply chain membersâ willingness
to share knowledge by using the game theory. The result of knowledge sharing between two
companies is analyzed by using the evolutionary game.
Findings: We broke the knowledge sharing process in supply chain collaborative innovation
into knowledge mining and knowledge transferring. We got the best knowledge sharing strategy
of each supply chain member. We gave the influencing factors of knowledge sharing between
members for the knowledge sharing mechanisms in supply chain collaborative innovation.
Research limitations/implications: We didnât study the willingness of more than two supply
chain members to share knowledge and the result of knowledge sharing between them. And
this situation is more realistic.
Practical implications: Our findings can help to improve the effect of knowledge sharing in
supply chain collaborative innovation.Originality/value: The paper introduces the game theory to knowledge sharing between
members in supply chain collaborative innovation, deepens the understanding of knowledge
sharing in supply chain collaborative innovation, and gives some interesting findings.Peer Reviewe
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