164 research outputs found
Nambu--Jona-Lasinio model in a parallel electromagnetic field
We explore the features of the and chiral symmetry breaking of the
Nambu--Jona-Lasinio model without the Kobayashi-Maskawa-'t Hooft determinant
term in the presence of a parallel electromagnetic field. We show that the
electromagnetic chiral anomaly can induce both finite neutral pion condensate
and isospin-singlet pseudo-scalar condensate and thus modifies the
chiral symmetry breaking pattern. In order to characterize the strength of the
symmetry breaking, we evaluate the susceptibility associated with the
charge. The result shows that the susceptibility contributed from the
chiral anomaly is consistent with the behavior of the corresponding
condensate. The spectra of the mesonic excitations are also studied
Detecting Chiral Magnetic Effect via Deep Learning
The search of chiral magnetic effect (CME) in heavy-ion collisions has
attracted long-term attentions. Multiple observables have been proposed but all
suffer from obstacles due to large background contaminations. In this Letter,
we construct an observable-independent CME-meter based on a deep convolutional
neural network. After trained over data set generated by a multiphase transport
model, the CME-meter shows high accuracy in recognizing the CME-featured charge
separation from the final-state pion spectra. It also exhibits remarkable
robustness to diverse conditions including different collision energies,
centralities, and elliptic flow backgrounds. In a transfer learning manner, the
CME-meter is validated in isobaric collision systems, showing good
transferability among different colliding systems. Based on variational
approaches, we utilize the DeepDream method to derive the most responsive
CME-spectra that demonstrates the physical contents the machine learns.Comment: 7 pages, 10 figure
RIED. Revista iberoamericana de educación a distancia
Resumen basado en el de la publicaciónTítulo, resumen y palabras clave también en inglésMonográfico con el título: “La integración efectiva del dispositivo móvil en la educación y en el aprendizaje"Se plantea el debate sobre las innovaciones y tecnologías disruptivas, proponiendo que el aprendizaje digital (nueva versión de la educación a distancia) está suponiendo una disrupción educativa porque plantea un cambio drástico de soportes y métodos y porque progresivamente va ganando espacio a los formatos convencionales. Se concluye afirmando que esta tendencia no está agotada, sino que continúa penetrando y ahondando la ruptura con las nuevas tecnologías, como, por ejemplo, las analíticas de aprendizaje, el aprendizaje adaptativo y el aprendizaje móvil.ES
Human Schwann Cell Transplantation for Spinal Cord Injury: Prospects and Challenges in Translational Medicine
The benefits of transplanting cultured Schwann cells (SCs) for the treatment of spinal cord injury (SCI) have been systematically investigated in experimental animals since the early 1990s. Importantly, human SC (hSC) transplantation for SCI has advanced to clinical testing and safety has been established via clinical trials conducted in the USA and abroad. However, multiple barriers must be overcome to enable accessible and effective treatments for SCI patients. This review presents available information on hSC transplantation for SCI with the intention to uncover gaps in our knowledge and discuss areas for future development. To this end, we introduce the historical progression of the work that supports existing and prospective clinical initiatives and explain the reasons for the choice of hSCs while also addressing their limitations as cell therapy products. A search of the relevant literature revealed that rat SCs have served as a preclinical model of reference since the onset of investigations, and that hSC transplants are relatively understudied, possibly due to the sophisticated resources and expertise needed for the traditional processing of hSC cultures from human nerves. In turn, we reason that additional experimentation and a reexamination of the available data are needed to understand the therapeutic value of hSC transplants taking into consideration that the manufacturing of the hSCs themselves may require further development for extended uses in basic research and clinical settings
Correlation of Circulating Glucocorticoid-Induced TNFR-Related Protein Ligand Levels with Disease Activity in Patients with Systemic Lupus Erythematosus
The aim of this paper is to investigate the correlation of glucocorticoid-induced tumor necrosis factor receptor- (TNFR-) related protein ligand (GITRL) with disease activity and organ involvement in patients with systemic lupus erythematosus (SLE). Serum GITRL levels were measured in 58 patients with SLE and 30 healthy controls matched for age and sex. Patients were assessed for clinical and laboratory variables. Correlations of serum GITRL levels with SLEDAI, laboratory values, and clinical manifestations were assessed. Serum GITRL levels were determined by ELISA. Serum GITRL levels were markedly increased in patients with SLE compared with healthy controls (mean 401.3 ng/mL and 36.59 ng/mL, resp.; P<0.0001). SLE patients with active disease showed higher serum GITRL levels compared to those with inactive disease (mean 403.3 ng/mL and 136.3 ng/mL, resp; P=0.0043) as well as normal controls (36.59 ng/mL; P<0.0001). Serum GITRL levels were positively correlated with SLEDAI, titers of anti-dsDNA antibody, erythrocyte sedimentation rate (ESR), and IgM and negatively correlated with complement3 (C3). Serum GITRL levels were higher in SLE patients with renal involvement and vasculitis compared with patients without the above-mentioned manifestations
Realistic Volume Rendering with Environment-Synced Illumination in Mixed Reality
Interactive volume visualization using a mixed reality (MR) system helps
provide users with an intuitive spatial perception of volumetric data. Due to
sophisticated requirements of user interaction and vision when using MR
head-mounted display (HMD) devices, the conflict between the realisticness and
efficiency of direct volume rendering (DVR) is yet to be resolved. In this
paper, a new MR visualization framework that supports interactive realistic DVR
is proposed. An efficient illumination estimation method is used to identify
the high dynamic range (HDR) environment illumination captured using a panorama
camera. To improve the visual quality of Monte Carlo-based DVR, a new
spatio-temporal denoising algorithm is designed. Based on a reprojection
strategy, it makes full use of temporal coherence between adjacent frames and
spatial coherence between the two screens of an HMD to optimize MR rendering
quality. Several MR development modules are also developed for related devices
to efficiently and stably display the DVR results in an MR HMD. Experimental
results demonstrate that our framework can better support immersive and
intuitive user perception during MR viewing than existing MR solutions.Comment: 6 pages, 6 figure
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