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158 results on '"Shen, Xiaoxue"'

4. Cultivating Online: Question Routing in a Question and Answering Community for Agriculture

Author

Shen, Xiaoxue, Gu, Liyang, and Jia, Adele Lu

Subjects
Computer Science - Social and Information Networks
Abstract

Community-based Question and Answering (CQA) platforms are nowadays enlightening over a billion people with crowdsourced knowledge. A key design issue in CQA platforms is how to find the potential answerers and to provide the askers timely and suitable answers, i.e., the so-called \textit{question routing} problem. State-of-art approaches often rely on extracting topics from the question texts. In this work, we analyze the question routing problem in a CQA system named Farm-Doctor that is exclusive for agricultural knowledge. The major challenge is that its questions contain limited textual information. To this end, we conduct an extensive measurement and obtain the whole knowledge repository of Farm-Doctor that consists of over 690 thousand questions and over 3 million answers. To remedy the text deficiency, we model Farm-Doctor as a heterogeneous information network that incorporates rich side information and based on network representation learning models we accurately recommend for each question the users that are highly likely to answer it. With an average income of fewer than 6 dollars a day, over 300 thousands farmers in China seek online in Farm-Doctor for agricultural advices. Our method helps these less eloquent farmers with their cultivation and hopefully provides a way to improve their lives.

Published
2019

5. User Donations in a Crowdsourced Video System

Author

Jia, Adele Lu, Shen, Xiaoxue, Shen, Siqi, and Xu, Jun

Subjects
Computer Science - Social and Information Networks, Computer Science - Computers and Society, Computer Science - Multimedia
Abstract

Crowdsourced video systems like YouTube and Twitch.tv have been a major internet phenomenon and are nowadays entertaining over a billion users. In addition to video sharing and viewing, over the years they have developed new features to boost the community engagement and some managed to attract users to donate, to the community as well as to other users. User donation directly reflects and influences user engagement in the community, and has a great impact on the success of such systems. Nevertheless, user donations in crowdsourced video systems remain trade secrets for most companies and to date are still unexplored. In this work, we attempt to fill this gap, and we obtain and provide a publicly available dataset on user donations in one crowdsourced video system named BiliBili. Based on information on nearly 40 thousand donators, we examine the dynamics of user donations and their social relationships, we quantitively reveal the factors that potentially impact user donation, and we adopt machine-learned classifiers and network representation learning models to timely and accurately predict the destinations of the majority and the individual donations., Comment: 8 pages

Published
2019

8. An Analysis of the Streamer Behaviors in Social Live Video Streaming

Author

Rao, Yuanxing, Wang, Wanxin, Shen, Xiaoxue, Jia, Lu, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Sun, Yuqing, editor, Liu, Dongning, editor, Liao, Hao, editor, Fan, Hongfei, editor, and Gao, Liping, editor

Published
2021
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9. An Analysis on User Behaviors in Online Question and Answering Communities

Author

Wang, Wanxin, Li, Shiming, Rao, Yuanxing, Shen, Xiaoxue, Jia, Lu, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Sun, Yuqing, editor, Liu, Dongning, editor, Liao, Hao, editor, Fan, Hongfei, editor, and Gao, Liping, editor

Published
2021
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11. Cultivating Online: Understanding Expert and Farmer Participation in an Agricultural Q&A Community

Author

Shen, Xiaoxue, Jia, Adele Lu, Sun, Ruizhi, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Barbosa, Simone Diniz Junqueira, Founding Editor, Sun, Yuqing, editor, Lu, Tun, editor, Yu, Zhengtao, editor, Fan, Hongfei, editor, and Gao, Liping, editor

Published
2019
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13. The effect of dietary vitamin A supplementation on growth, gonadal development, molting, immunity, and ammonia nitrogen resistance in sub-adult male Chinese mitten crab, Eriocheir sinensis

Author

Jiang, Weibo, primary, Jia, Xiaoyan, additional, Zhang, Maorong, additional, Qiang, Wei, additional, Shen, Xiaoxue, additional, Jiang, Guangzhen, additional, Li, Xiangfei, additional, Chi, Cheng, additional, Liu, Hengtong, additional, Liu, Wenbin, additional, and Zhang, Dingdong, additional

Published
2023
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17. Hierarchically Responsive Alternating Nano‐Copolymers with Tailored Interparticle Bonds.

Author

He, Huibin, Shen, Xiaoxue, Yao, Chongyang, Tao, Jing, Chen, Wenwen, Nie, Zhihong, Wu, Yue, Dai, Liwei, and Sang, Yutao

Subjects
*SURFACE plasmon resonance, *ELECTROSTATIC interaction, *POLYMERS, *ELECTRONIC equipment, *COPOLYMERS, *BLOCK copolymers
Abstract

Self‐assembly of inorganic nanoparticles (NPs) is an essential tool for constructing structured materials with a wide range of applications. However, achieving ordered assembly structures with externally programmable properties in binary NP systems remains challenging. In this work, we assemble binary inorganic NPs into hierarchically pH‐responsive alternating copolymer‐like nanostructures in an aqueous medium by engineering the interparticle electrostatic interactions. The polymer‐grafted NPs bearing opposite charges are viewed as nanoscale monomers ("nanomers"), and copolymerized into alternating nano‐copolymers (ANCPs) driven by the formation of interparticle "bonds" between nanomers. The resulting ANCPs exhibit reversibly responsive "bond" length (i.e. the distance between nanomers) in response to the variation of pH in a range of ~7–10, allowing precise control over the surface plasmon resonance of ANCPs. Moreover, specific interparticle "bonds" can break up at pH≥11, leading to the dis‐assembly of ANCPs into molecule‐like dimers and trimers. These dimeric and trimeric structures can reassemble to form ANCPs owing to the resuming of interparticle "bonds", when the pH value of the solution changes from 11 to 7. The hierarchically responsive nanostructures may find applications in such as biosensing, optical waveguide, and electronic devices. [ABSTRACT FROM AUTHOR]

Published
2024
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34. Prediction of Maximum Fast Time-weighted Levels from a Heavy Impact Source on a Timber Floor

Author

Shen, Xiaoxue, Hopkins, Carl, and University of Liverpool

Subjects
[PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph], FEM, Timber floor, Rubber ball, TSEA, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

International audience; The ISO rubber ball is used in measurement standards to assess heavy impacts on floors such as from footsteps in bare feet or children jumping. This paper investigates the prediction of the impact sound insulation using the Finite Element Method (FEM) and Transient Statistical Energy Analysis (TSEA). An assessment is made of modelling the rubber ball impact on a timber floor by simulating the rubber ball or by applying the contact force directly. The latter is advantageous in reducing the computation time and examples are shown of the differences in the approaches. An experimentally validated FEM model of a small timber floor is compared with Transient Statistical Energy Analysis (TSEA) in terms of the spatial-average maximum time-weighted vibration level on the surface of the timber floor using TSEA models of increasing complexity. Finally, laboratory measurements for a real case of rubber ball drop on a timber floor is used to assess FEM and TSEA models.

Published
2020

43. Alteration of sphingosine‐1‐phosphate with aging induces contractile dysfunction of colonic smooth muscle cells via Ca2+‐activated K+ channel (BKCa) upregulation.

Author

Shen, Xiaoxue, Zhang, Ling, Jiang, Ling, Xiong, Wenjie, Tang, Yurong, Lin, Lin, and Yu, Ting

Subjects
*CONTRACTILE proteins, *SPHINGOSINE-1-phosphate, *PROTEIN kinase B, *C-Jun N-terminal kinases, *SMOOTH muscle, *CALCIUM-dependent potassium channels
Abstract

Background: Age‐associated changes alter calcium‐activated potassium channel (BKCa) expression of colon. Sphingolipids (SLs) are important cell membrane structural components; altered composition of SLs may affect BKCa expression. This study investigated the mechanism by which sphingosine‐1‐phosphate (S1P) contributes to age‐associated contractile dysfunction. Methods: Fifty male Sprague Dawley rats of different ages were randomly assigned to five age‐groups, namely 3, 6, 12, 18, and 24 months. BKCa expression, S1P levels, and phosphorylated myosin light chain (p‐MLC) levels were tested in colonic tissues. In the absence and presence of S1P treatment, BKCa expression, p‐MLC levels, and intracellular calcium mobilization were tested in vitro. BKCa small interfering RNA (siRNA) was used to investigate whether p‐MLC expression and calcium mobilization were affected by BKCa in colonic smooth muscle cells (SMCs). The expressions of phosphorylated protein kinase B, c‐Jun N‐terminal kinases (JNKs), extracellular‐regulated protein kinases, nuclear factor kappa‐B (NF‐κB), and protein kinase Cζ (PKCζ) were examined to investigate the correlation between S1P and BKCa. Key Results: Sphingosine‐1‐phosphate levels and sphingosine‐1‐phosphate receptor 2 (S1PR2) and BKCa expressions were upregulated and p‐MLC expression was downregulated in the colonic tissues, age dependently. In the cultured SMCs, S1P treatment increased BKCa expression and reduced calcium concentration and p‐MLC was observed. BKCa siRNA increased calcium concentration, and p‐MLC levels significantly compared with control. We also showed that S1P upregulated BKCa through PKCζ, JNK, and NF‐κB pathways. Conclusions and Inferences: In conclusion, S1P and S1PR2 participate in age‐associated contractile dysfunction via BKCa upregulation through PKCζ, JNK, and NF‐κB pathways. [ABSTRACT FROM AUTHOR]

Published
2021
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