3,303 research outputs found
Trapping a Free-propagating Single-photon into an Atomic Ensemble as a Quantum Stationary Light Pulse
Efficient photon-photon interaction is one of the key elements for realizing
quantum information processing. The interaction, however, must often be
mediated through an atomic medium due to the bosonic nature of photons, and the
interaction time, which is critically linked to the efficiency, depends on the
properties of the atom-photon interaction. While the electromagnetically
induced transparency effect does offer the possibility of photonic quantum
memory, it does not enhance the interaction time as it fully maps the photonic
state to an atomic state. The stationary light pulse (SLP) effect, on the
contrary, traps the photonic state inside an atomic medium with zero group
velocity, opening up the possibility of the enhanced interaction time. In this
work, we report the first experimental demonstration of trapping a
free-propagating single-photon into a cold atomic ensemble via the quantum SLP
(QSLP) process. We conclusively show that the quantum properties of the
single-photon state are preserved well during the QSLP process. Our work paves
the way to new approaches for efficient photon-photon interactions, exotic
photonic states, and many-body simulations in photonic systems
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PS49. Shifted Circadian Phase in Manic Episode was Returned to Normal after Treatment in Bipolar Disorder
Alternative Embryo Transfer on Day 3 or Day 5 for Reducing the Risk of Multiple Gestations
Purpose: This study was carried out to reduce the possibility of high-order multiple gestations and the failure of embryo transfer by determining their replacement date based on the number and quality of 2-day embryos.
Methods: All zygotes were cocultured with cumulus cells in 10 ¹l of YS medium containing 10% human follicular fluid (hFF) for 48 or 96 hr. In period I, all embryos were transferred on day 3 (1032 cycles). In period II, the embryos were transferred on either day 3 or day 5 by determining their replacement date based on the number and quality of 2-day embryos: there were 2701 patients in whom embryos were replaced on day 3 (in the case that the number of zygotes was less than eight and the number of good-quality embryos was less than three) and 1952 patients less than 40 years old in whom embryos were replaced on day 5 (in the case that the number of zygotes was eight or more and/or the number of good-quality embryos was three or more). On the other hand, patients who were 40 years old or more were alloted to day 3 transfer cycles, regardless of the number and quality of the 2-day embryos, due to the possibility of their not producing blastocyst-stage embryos in vitro.
Results: The number of embryos transferred in period II was 2.9 ± 0.6, while that in period I was 3.7 ± 0.5. The multiple pregnancy rate was significantly decreased in period II (30.7%) compared to that (49.6%) in period I, while the pregnancy and implantation rates in period II (36.1 and 16.4%, respectively) were not lower than those (34.9 and 16.1%, respectively) in period I. The rate of triplet or more gestations was significantly minimized in period II (2.3%) compared to that in period I (26.5%).
Conclusions: We propose that determination of the date on which embryos should be transferred based on the number and quality of embryos on day 2 may help to maintain an acceptable pregnancy rate, while minimizing embryo transfer failure and high-order multiple gestations
Construction cost estimation using a case-based reasoning hybrid genetic algorithm based on local search method
Estimates of project costs in the early stages of a construction project have a significant impact on the operator\u27s decision-making in essential matters, such as the site\u27s decision or the construction period. However, it is not easy to carry out the initial stage with confidence, because information such as design books and specifications is not available. In previous studies, case-based reasoning (CBR) is used to estimate initial construction costs, and genetic algorithms are used to calculate the weight of the retrieve phase in CBR\u27s process. However, it is difficult to draw a better solution than the current one, because existing genetic algorithms use random numbers. To overcome these limitations, we reflect correlation numbers in the genetic algorithms by using the method of local search. Then, we determine the weights using a hybrid genetic algorithm that combines local search and genetic algorithms. A case-based reasoning model was developed using a hybrid genetic algorithm. Then, the model was verified with construction cost data that were not used for the development of the model. As a result, it was found that the hybrid genetic algorithm and case-based reasoning applied with the local search performed better than the existing solution. The detail mean error value was found to be 3.52%, 6.15%, and 0.33% higher for each case than the previous one
LISA: Localized Image Stylization with Audio via Implicit Neural Representation
We present a novel framework, Localized Image Stylization with Audio (LISA)
which performs audio-driven localized image stylization. Sound often provides
information about the specific context of the scene and is closely related to a
certain part of the scene or object. However, existing image stylization works
have focused on stylizing the entire image using an image or text input.
Stylizing a particular part of the image based on audio input is natural but
challenging. In this work, we propose a framework that a user provides an audio
input to localize the sound source in the input image and another for locally
stylizing the target object or scene. LISA first produces a delicate
localization map with an audio-visual localization network by leveraging CLIP
embedding space. We then utilize implicit neural representation (INR) along
with the predicted localization map to stylize the target object or scene based
on sound information. The proposed INR can manipulate the localized pixel
values to be semantically consistent with the provided audio input. Through a
series of experiments, we show that the proposed framework outperforms the
other audio-guided stylization methods. Moreover, LISA constructs concise
localization maps and naturally manipulates the target object or scene in
accordance with the given audio input
A NUMERICAL STUDY ON THE OPEN WATER PERFORMANCE OF A PROPELLER WITH SINUSOIDAL PITCH MOTION
When a ship operates in waves, the ship moves with 6 degrees-of-freedom, and a propeller at the stern of the ship cannot avoid moving due to the ship motion. Therefore, it is important to analyse the propulsion performance while considering the ship motion in waves for efficient ship operation. The pitch motion of the ship has a dominant effect on the variation of the propeller performance and results in sinusoidal pitch motion of the propeller. In this study, a numerical analysis was done using a KP458 model propeller with a diameter of 10 cm, which was designed for the KLVCC2 body plan. The propeller performance was calculated using computational fluid dynamics (CFD) at several constant tilt angles. Numerical simulations were then conducted with sinusoidal pitch motion in several conditions of varying pitch angle. The variations of the thrust and torque of the propeller in sinusoidal pitch motion were compared with the results obtained in constant tilt angles
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