10,716 research outputs found
Magneto-Optical Stern-Gerlach Effect in Atomic Ensemble
We study the birefringence of the quantized polarized light in a
magneto-optically manipulated atomic ensemble as a generalized Stern-Gerlach
Effect of light. To explain this engineered birefringence microscopically, we
derive an effective Shr\"odinger equation for the spatial motion of two
orthogonally polarized components, which behave as a spin with an effective
magnetic moment leading to a Stern-Gerlach split in an nonuniform magnetic
field. We show that electromagnetic induced transparency (EIT) mechanism can
enhance the magneto-optical Stern-Gerlach effect of light in the presence of a
control field with a transverse spatial profile and a inhomogeneous magnetic
field.Comment: 7 pages, 5 figure
Ultra-intensified intermittent-perfusion fed-batch (UIIPFB) process quadrupled productivity of a bispecific antibody
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High hepatitis B virus load is associated with hepatocellular carcinomas development in Chinese chronic hepatitis B patients: a case control study
<p>Abstract</p> <p>Background</p> <p>Persistent hepatitis B virus (HBV) infection is a risk factor for hepatocellular carcinoma (HCC) development. This study aimed to clarify whether the high HBV DNA level is associated with HCC development by comparing HBV DNA levels between HBV infected patients with and without HCC.</p> <p>Results</p> <p>There were 78 male and 12 female patients in each group and there was no statistical difference between these two group patients' average ages. The HBV DNA level in the HCC patients was 4.73 ± 1.71 Log<sub>10 </sub>IU/ml while 3.90 ± 2.01 Log<sub>10 </sub>IU/ml in non-HCC patients (<it>P </it>< 0.01). The HBeAg positive rate was 42.2% (38/90) in the HCC group while 13.3% (12/90) in the non-HCC group (<it>P </it>< 0.001). Compared with patients with HBV DNA level of < 3 Log<sub>10 </sub>IU/ml, the patients with level of 3 to < 4, 4 to < 5, 5 to < 6, or ≥ 6 Log<sub>10 </sub>IU/ml had the odds ratio for HCC of 1.380 (95% CI, 0.544-3.499), 3.671 (95% CI, 1.363-9.886), 5.303 (95% CI, 1.847-15.277) or 3.030 (95% CI, 1.143-8.036), respectively.</p> <p>Conclusions</p> <p>HBV-related HCC patients had higher HBV DNA level than non-HCC counterparts. Our findings imply that active HBV replication is associated with the HCC development.</p
Demystifying Privacy Policy of Third-Party Libraries in Mobile Apps
The privacy of personal information has received significant attention in
mobile software. Although previous researchers have designed some methods to
identify the conflict between app behavior and privacy policies, little is
known about investigating regulation requirements for third-party libraries
(TPLs). The regulators enacted multiple regulations to regulate the usage of
personal information for TPLs (e.g., the "California Consumer Privacy Act"
requires businesses clearly notify consumers if they share consumers' data with
third parties or not). However, it remains challenging to analyze the legality
of TPLs due to three reasons: 1) TPLs are mainly published on public
repositoriesinstead of app market (e.g., Google play). The public repositories
do not perform privacy compliance analysis for each TPL. 2) TPLs only provide
independent functions or function sequences. They cannot run independently,
which limits the application of performing dynamic analysis. 3) Since not all
the functions of TPLs are related to user privacy, we must locate the functions
of TPLs that access/process personal information before performing privacy
compliance analysis. To overcome the above challenges, in this paper, we
propose an automated system named ATPChecker to analyze whether the Android
TPLs meet privacy-related regulations or not. Our findings remind developers to
be mindful of TPL usage when developing apps or writing privacy policies to
avoid violating regulation
Irregular Traffic Time Series Forecasting Based on Asynchronous Spatio-Temporal Graph Convolutional Network
Accurate traffic forecasting at intersections governed by intelligent traffic
signals is critical for the advancement of an effective intelligent traffic
signal control system. However, due to the irregular traffic time series
produced by intelligent intersections, the traffic forecasting task becomes
much more intractable and imposes three major new challenges: 1) asynchronous
spatial dependency, 2) irregular temporal dependency among traffic data, and 3)
variable-length sequence to be predicted, which severely impede the performance
of current traffic forecasting methods. To this end, we propose an Asynchronous
Spatio-tEmporal graph convolutional nEtwoRk (ASeer) to predict the traffic
states of the lanes entering intelligent intersections in a future time window.
Specifically, by linking lanes via a traffic diffusion graph, we first propose
an Asynchronous Graph Diffusion Network to model the asynchronous spatial
dependency between the time-misaligned traffic state measurements of lanes.
After that, to capture the temporal dependency within irregular traffic state
sequence, a learnable personalized time encoding is devised to embed the
continuous time for each lane. Then we propose a Transformable Time-aware
Convolution Network that learns meta-filters to derive time-aware convolution
filters with transformable filter sizes for efficient temporal convolution on
the irregular sequence. Furthermore, a Semi-Autoregressive Prediction Network
consisting of a state evolution unit and a semiautoregressive predictor is
designed to effectively and efficiently predict variable-length traffic state
sequences. Extensive experiments on two real-world datasets demonstrate the
effectiveness of ASeer in six metrics
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