82 research outputs found
New Signatures For Top In Hadron Collider
We study the signatures for new TeV resonances that couple to top or bottom
quarks both at the Tevatron Run II and at the LHC. We find that it is possible
to study these resonances when they are produced in association with a pair of
heavy quarks or in association with a single top at the LHC. In particular,
with an integrated luminosity of 300 fb at the LHC, it is possible to
probe resonance masses up to around 2 TeV.Comment: 4 pages, 2 figures. Presented at the 2004 Meeting of the APS Division
of Particles and Fields, University of California, Riverside, CA, Aug 26-31,
200
Localization and Discrete Beamforming with a Large Reconfigurable Intelligent Surface
In millimeter-wave (mmWave) cellular systems, reconfigurable intelligent
surfaces (RISs) are foreseeably deployed with a large number of reflecting
elements to achieve high beamforming gains. The large-sized RIS will make radio
links fall in the near-field localization regime with spatial non-stationarity
issues. Moreover, the discrete phase restriction on the RIS reflection
coefficient incurs exponential complexity for discrete beamforming. It remains
an open problem to find the optimal RIS reflection coefficient design in
polynomial time. To address these issues, we propose a scalable
partitioned-far-field protocol that considers both the near-filed
non-stationarity and discrete beamforming. The protocol approximates near-field
signal propagation using a partitioned-far-field representation to inherit the
sparsity from the sophisticated far-field and facilitate the near-field
localization scheme. To improve the theoretical localization performance, we
propose a fast passive beamforming (FPB) algorithm that optimally solves the
discrete RIS beamforming problem, reducing the search complexity from
exponential order to linear order. Furthermore, by exploiting the partitioned
structure of RIS, we introduce a two-stage coarse-to-fine localization
algorithm that leverages both the time delay and angle information. Numerical
results demonstrate that centimeter-level localization precision is achieved
under medium and high signal-to-noise ratios (SNR), revealing that RISs can
provide support for low-cost and high-precision localization in future cellular
systems.Comment: 13 page
LiveVV: Human-Centered Live Volumetric Video Streaming System
Volumetric video has emerged as a prominent medium within the realm of
eXtended Reality (XR) with the advancements in computer graphics and depth
capture hardware. Users can fully immersive themselves in volumetric video with
the ability to switch their viewport in six degree-of-freedom (DOF), including
three rotational dimensions (yaw, pitch, roll) and three translational
dimensions (X, Y, Z). Different from traditional 2D videos that are composed of
pixel matrices, volumetric videos employ point clouds, meshes, or voxels to
represent a volumetric scene, resulting in significantly larger data sizes.
While previous works have successfully achieved volumetric video streaming in
video-on-demand scenarios, the live streaming of volumetric video remains an
unresolved challenge due to the limited network bandwidth and stringent latency
constraints. In this paper, we for the first time propose a holistic live
volumetric video streaming system, LiveVV, which achieves multi-view capture,
scene segmentation \& reuse, adaptive transmission, and rendering. LiveVV
contains multiple lightweight volumetric video capture modules that are capable
of being deployed without prior preparation. To reduce bandwidth consumption,
LiveVV processes static and dynamic volumetric content separately by reusing
static data with low disparity and decimating data with low visual saliency.
Besides, to deal with network fluctuation, LiveVV integrates a volumetric video
adaptive bitrate streaming algorithm (VABR) to enable fluent playback with the
maximum quality of experience. Extensive real-world experiment shows that
LiveVV can achieve live volumetric video streaming at a frame rate of 24 fps
with a latency of less than 350ms
Hadron Collider Signatures for New Interactions of Top and Bottom Quarks
One of the main goals for hadron colliders is the study of the properties of
the third generation quarks. We study the signatures for new TeV resonances
that couple to top or bottom quarks both at the Tevatron Run II and at the LHC.
We find that in the simplest production processes of Drell-Yan type at the
Tevatron, the signals are overwhelmed by QCD backgrounds. We also find that it
is possible to study these resonances when they are produced in association
with a pair of heavy quarks or in association with a single top at the LHC.In
particular, with an integrated luminosity of 300 fb at the LHC, it is
possible to probe resonance masses up to around 2 TeV.Comment: 24 pages, 15 figures, Minor corrections, version to appear in Phys.
Rev.
Role of corticotropin-releasing hormone in the impact of chronic stress during pregnancy on inducing depression in male offspring mice
This is an accepted manuscript of an article published by Elsevier in Brain Research on 30/07/2020, available online: https://doi.org/10.1016/j.brainres.2020.147029 The accepted version of the publication may differ from the final published version.This work was supported by the National Natural Science Foundation of China (grant no. 81773452).Published versio
Identification of protein phosphatase 4 catalytic subunit as a Wnt promoting factor in pan-cancer and Xenopus early embryogenesis
Abstract Protein Phosphatase 4 Catalytic Subunit (PPP4C) is an evolutionarily conserved protein involved in multiple biological and pathological events, including embryogenesis, organogenesis, cellular homeostasis, and oncogenesis. However, the detailed mechanisms underlying these processes remain largely unknown. Thus, we investigated the potential correlation between PPP4C and biological processes (BPs) and canonical Wnt signaling using pan-cancer analysis and Xenopus laevis (X. laevis) embryo model. Our results indicate that PPP4C is a potential biomarker for specific cancer types due to its high diagnostic accuracy and significant prognostic correlation. Furthermore, in multiple cancer types, PPP4C-related differentially expressed genes (DEGs) were significantly enriched in pattern specification, morphogenesis, and canonical Wnt activation. Consistently, perturbation of Ppp4c in X. laevis embryos interfered with normal embryogenesis and canonical Wnt responses. Moreover, biochemical analysis of X. laevis embryos demonstrated that both endogenous and exogenous Ppp4c negatively regulated AXIN1 (Wnt inhibitor) abundance. This study provides novel insights into PPP4C roles in pattern specification and Wnt activation. The similarities in BPs and Wnt signaling regulation regarding PPP4C support the intrinsic link between tumorigenesis and early embryogenesis
Big Data and Predictive Analytics for Business Intelligence: A Bibliographic Study (2000â2021)
Big data technology and predictive analytics exhibit advanced potential for business intelligence (BI), especially for decision-making. This study aimed to explore current research studies, historic developing trends, and the future direction. A bibliographic study based on CiteSpace is implemented in this paper, 681 non-duplicate publications are retrieved from databases of Web of Science Core Collection (WoSCC) and Scopus from 2000 to 2021. The countries, institutions, cited authors, cited journals, and cited references with the most academic contributions were identified. Social networks and collaborations between countries, institutions, and scholars are explored. The cross degree of disciplinaries is measured. The hotspot distribution and burst keyword historic trend are explored, where research methods, BI-based applications, and challenges are separately discussed. Reasons for hotspots bursting in 2021 are explored. Finally, the research direction is predicted, and the advice is delivered to future researchers. Findings show that big data and AI-based methods for BI are one of the most popular research topics in the next few years, especially when it applies to topics of COVID-19, healthcare, hospitality, and 5G. Thus, this study contributes reference value for future research, especially for direct selection and method application
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