97 research outputs found
The Magnetic Properties of 1111-type Diluted Magnetic Semiconductor (LaBa)(ZnMn)AsO in the Low Doping Regime
We investigated the magnetic properties of
(LaBa)(ZnMn)AsO with varying from 0.005 to 0.05
at an external magnetic field of 1000 Oe. For doping levels of 0.01,
the system remains paramagnetic down to the lowest measurable temperature of 2
K. Only when the doping level increases to = 0.02 does the ferromagnetic
ordering appear. Our analysis indicates that antiferromagnetic exchange
interactions dominate for 0.01, as shown by the negative Weiss
temperature fitted from the magnetization data. The Weiss temperature becomes
positive, i.e., ferromagnetic coupling starts to dominate, for 0.02.
The Mn-Mn spin interaction parameter is estimated to be in
the order of 10 K for both 0.01 (antiferromagnetic ordered state)
and 0.02 (ferromagnetic ordered state). Our results unequivocally
demonstrate the competition between ferromagnetic and antiferromagnetic
exchange interactions in carrier-mediated ferromagnetic systems.Comment: 9 pages, 3 figure
YOLOCS: Object Detection based on Dense Channel Compression for Feature Spatial Solidification
In this study, we examine the associations between channel features and
convolutional kernels during the processes of feature purification and gradient
backpropagation, with a focus on the forward and backward propagation within
the network. Consequently, we propose a method called Dense Channel Compression
for Feature Spatial Solidification. Drawing upon the central concept of this
method, we introduce two innovative modules for backbone and head networks: the
Dense Channel Compression for Feature Spatial Solidification Structure (DCFS)
and the Asymmetric Multi-Level Compression Decoupled Head (ADH). When
integrated into the YOLOv5 model, these two modules demonstrate exceptional
performance, resulting in a modified model referred to as YOLOCS. Evaluated on
the MSCOCO dataset, the large, medium, and small YOLOCS models yield AP of
50.1%, 47.6%, and 42.5%, respectively. Maintaining inference speeds remarkably
similar to those of the YOLOv5 model, the large, medium, and small YOLOCS
models surpass the YOLOv5 model's AP by 1.1%, 2.3%, and 5.2%, respectively
Kuaipedia: a Large-scale Multi-modal Short-video Encyclopedia
Online encyclopedias, such as Wikipedia, have been well-developed and
researched in the last two decades. One can find any attributes or other
information of a wiki item on a wiki page edited by a community of volunteers.
However, the traditional text, images and tables can hardly express some
aspects of an wiki item. For example, when we talk about ``Shiba Inu'', one may
care more about ``How to feed it'' or ``How to train it not to protect its
food''. Currently, short-video platforms have become a hallmark in the online
world. Whether you're on TikTok, Instagram, Kuaishou, or YouTube Shorts,
short-video apps have changed how we consume and create content today. Except
for producing short videos for entertainment, we can find more and more authors
sharing insightful knowledge widely across all walks of life. These short
videos, which we call knowledge videos, can easily express any aspects (e.g.
hair or how-to-feed) consumers want to know about an item (e.g. Shiba Inu), and
they can be systematically analyzed and organized like an online encyclopedia.
In this paper, we propose Kuaipedia, a large-scale multi-modal encyclopedia
consisting of items, aspects, and short videos lined to them, which was
extracted from billions of videos of Kuaishou (Kwai), a well-known short-video
platform in China. We first collected items from multiple sources and mined
user-centered aspects from millions of users' queries to build an item-aspect
tree. Then we propose a new task called ``multi-modal item-aspect linking'' as
an expansion of ``entity linking'' to link short videos into item-aspect pairs
and build the whole short-video encyclopedia. Intrinsic evaluations show that
our encyclopedia is of large scale and highly accurate. We also conduct
sufficient extrinsic experiments to show how Kuaipedia can help fundamental
applications such as entity typing and entity linking
Family function, anxiety and depression in adults with disabilities: a network analysis
BackgroundThe prevalence of family dysfunction, anxiety and depression is high in people with disabilities due to long-term activity constraints and social difficulties. Recently, although studies have attempted to provide guidance for family therapy by focusing on the relationship between family function and negative emotions, the specific effects of improved family function during family therapy on alleviation of anxiety and depressive symptoms have been obscured. Thus, this study attempted to elucidate the impact of specific family functioning on specific symptoms of anxiety and depression through network analysis.MethodsFamily APGAR Index Questionnaire (APGAR), Generalized Anxiety Scale (GAD-7), and Patient Health Questionnaire Depression Scale (PHQ-9) were used to survey 897 adults with disabilities in Sichuan Province. Meanwhile, network analysis for studying the relationship between anxiety, depression and family functioning among the disabled via R software.ResultsThe network analysis showed that (1) Nodes PHQ4 (“Energy”), APGAR3 (“Growth”), GAD1 (“Nervousness”) and GAD4 (“Relaxing Trouble”) were central nodes in the network model; (2) Bridge nodes linking family function, anxiety and depressive symptoms in the sample were PHQ9 (“Suicide ideation”), PHQ6 (“Worthlessness”), GAD1 (“Nervousness”) and GAD5 (“Restlessness”); (3) The node APGAR5 (“Resolve”) directly connects the bridge symptoms PHQ9 (“Suicide ideation”) and PHQ8 (“Motor”).ConclusionThis study suggests that therapists could target the resolve of family members during family therapy to reduce suicidal ideation and enhance the level of activity of people with disabilities, thereby improving the network of anxiety and depression symptoms and alleviating negative emotions of people with disabilities
The CircHAS2/RPL23/MMP9 Axis Facilitates Brain Tumor Metastasis
Background: Circular RNAs (circRNAs) regulate tumor development by interacting with microRNAs. However, limited research has been conducted on the roles of circRNAs in gliomas. Therefore, we sought to demonstrate the function and molecular mechanism of circHAS2 in gliomas. Methods: CircHAS2, hsa-miR-508-3p, RPL23, and MMP9 mRNA levels were assessed with qRT-PCR. RPL23 and MMP9 protein levels were determined with western blotting and immunohistochemical staining. Glioma cell migration and invasion were assessed with Transwell assays. The interaction between hsa-miR-508-3p and circHAS2 or RPL23 was predicted with RNAhybrid and miRanda, and confirmed through luciferase reporter assays. The effects of circHAS2 on glioma cells were demonstrated in a nude mouse orthotopic xenograft glioma model. Results: We computationally analyzed the differentially expressed circRNAs in glioma tissues by using the GEO database. The screening indicated that circHAS2 was located primarily in the cytoplasm. Functionally, silencing of circHAS2 inhibited glioma migration and invasion. Mechanically, hsa-miR-508-3p was identified as a downstream target of circHAS2. CircHAS2 was found to regulate RPL23 and influence MMP9 via hsa-miR-508-3p, thereby promoting glioma migration and invasion. Moreover, inhibition of circHAS2 impeded the progression of U87 glioma cells in vivo. Conclusion: CircHAS2 regulates RPL23 and subsequent MMP9 expression by sponging hsa-miR508-3p in glioma cells
A Unified Model for Video Understanding and Knowledge Embedding with Heterogeneous Knowledge Graph Dataset
Video understanding is an important task in short video business platforms
and it has a wide application in video recommendation and classification. Most
of the existing video understanding works only focus on the information that
appeared within the video content, including the video frames, audio and text.
However, introducing common sense knowledge from the external Knowledge Graph
(KG) dataset is essential for video understanding when referring to the content
which is less relevant to the video. Owing to the lack of video knowledge graph
dataset, the work which integrates video understanding and KG is rare. In this
paper, we propose a heterogeneous dataset that contains the multi-modal video
entity and fruitful common sense relations. This dataset also provides multiple
novel video inference tasks like the Video-Relation-Tag (VRT) and
Video-Relation-Video (VRV) tasks. Furthermore, based on this dataset, we
propose an end-to-end model that jointly optimizes the video understanding
objective with knowledge graph embedding, which can not only better inject
factual knowledge into video understanding but also generate effective
multi-modal entity embedding for KG. Comprehensive experiments indicate that
combining video understanding embedding with factual knowledge benefits the
content-based video retrieval performance. Moreover, it also helps the model
generate better knowledge graph embedding which outperforms traditional
KGE-based methods on VRT and VRV tasks with at least 42.36% and 17.73%
improvement in HITS@10
DESI Legacy Imaging Surveys Data Release 9: Cosmological Constraints from Galaxy Clustering and Weak Lensing using the Minimal Bias Model
We present a tentative constraint on cosmological parameters and
from a joint analysis of galaxy clustering and galaxy-galaxy lensing
from DESI Legacy Imaging Surveys Data Release 9 (DR9), covering approximately
10000 square degrees and spanning the redshift range of 0.1 to 0.9. To study
the dependence of cosmological parameters on lens redshift, we divide lens
galaxies into seven approximately volume-limited samples, each with an equal
width in photometric redshift. To retrieve the intrinsic projected correlation
function from the lens samples, we employ a novel method
to account for redshift uncertainties. Additionally, we measured the
galaxy-galaxy lensing signal for each lens sample,
using source galaxies selected from the shear catalog by applying our
\texttt{Fourier\_Quad} pipeline to DR9 images. We model these observables
within the flat CDM framework, employing the minimal bias model. To
ensure the reliability of the minimal bias model, we apply conservative scale
cuts: and , for and
, respectively. Our findings suggest a mild tendency
that increases with lens redshift,
although this trend is only marginally significant. When we combine low
redshift samples, the value of is determined to be ,
consistent with the Planck results but significantly higher than the 3
2pt analysis by 2-5. Despite the fact that further refinements in
measurements and modeling could improve the accuracy of our results, the
consistency with standard values demonstrates the potential of our method for
more precise and accurate cosmology in the future.Comment: slightly different with the published versio
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