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  1. Article ; Online: Smart classroom learning environment preferences of higher education teachers and students in China

    Zhicheng Dai / Junxia Xiong / Liang Zhao / Xiaoliang Zhu

    Heliyon, Vol 9, Iss 6, Pp e16769- (2023)

    An ecological perspective

    2023  

    Abstract: By evaluating learners' perceived preferences for the learning environment, we can understand the important characteristics and better improve the learning environment, ultimately to provide great potential for the optimization of teaching practice. ... ...

    Abstract By evaluating learners' perceived preferences for the learning environment, we can understand the important characteristics and better improve the learning environment, ultimately to provide great potential for the optimization of teaching practice. Seeing that the current research pays less attention to teachers' and students’ preferences for the space environment simultaneously, based on the survey of 1937 undergraduates and 107 teachers from a university in central China, this study aims to explore their preferences for smart learning environment. Based on the ecological theory and research results of the existing learning environment, this paper constructed an ecological model and a conceptual model of learning space preferences. An empirical study was conducted to explore the impact of sociodemographic variables on personal spatial preference. The results showed that teachers and students had a positive attitude towards the smart learning environment, and gender, age, grade, subject category and other variables had limited impact on spatial preference.
    Keywords Smart classroom ; Learning environment preferences ; Higher education ; Teachers and students ; Ecological ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
    Subject code 370
    Language English
    Publishing date 2023-06-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Design, Synthesis, and Application in OFET of a Quinoxaline-Based D-A Conjugated Polymer

    Zhicheng Dai / Daohai Zhang / Haichang Zhang

    Frontiers in Chemistry, Vol

    2022  Volume 10

    Abstract: A novel alternating donor–acceptor polymer PQ1 is designed and synthesized by palladium-catalyzed Stille coupling between quinoxaline as an electron-deficient unit and indacenodithiophene (IDT) as electron-rich groups. Polymer PQ1 presents not only a ... ...

    Abstract A novel alternating donor–acceptor polymer PQ1 is designed and synthesized by palladium-catalyzed Stille coupling between quinoxaline as an electron-deficient unit and indacenodithiophene (IDT) as electron-rich groups. Polymer PQ1 presents not only a strong intramolecular charge transfer effect, which is beneficial for the charge transport within single molecules but also a narrow electrochemical band gap and a high highest occupied molecular orbital (HOMO) energy level. In addition, the optical absorption study indicates that the PQ1 film exhibits good aggregation, which is an advantage for the charge transport between neighboring molecules. As a consequence, PQ1 presents p-type semiconductor properties with a high hole mobility of up to 0.12 cm2 V−1 s−1. This study reveals the great potential of quinoxaline-type chromophores in constructing novel organic semiconductors.
    Keywords organic field-effect transistor ; conjugated polymers ; quinoxaline ; donor ; acceptor ; Chemistry ; QD1-999
    Language English
    Publishing date 2022-06-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Editorial

    Zhicheng Dai / Taotao Ai / Qixin Zhou / Haichang Zhang

    Frontiers in Chemistry, Vol

    Design, Synthesis, and Application of Novel π-Conjugated Materials

    2021  Volume 8

    Keywords π-conjugated materials ; electronics ; OPV ; OLED ; sensor ; Chemistry ; QD1-999
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Editorial

    Zhicheng Dai / Taotao Ai / Qixin Zhou / Haichang Zhang

    Frontiers in Chemistry, Vol

    Design, Synthesis, and Application of Novel π-Conjugated Materials—Part Ⅱ

    2021  Volume 9

    Keywords π-conjugated materials ; organic field effect transistors ; sensors ; organic solar cells ; electronics ; Chemistry ; QD1-999
    Language English
    Publishing date 2021-09-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: An Improved Tiered Head Pose Estimation Network with Self-Adjust Loss Function

    Xiaoliang Zhu / Qiaolai Yang / Liang Zhao / Zhicheng Dai / Zili He / Wenting Rong / Junyi Sun / Gendong Liu

    Entropy, Vol 24, Iss 7, p

    2022  Volume 974

    Abstract: As an important task in computer vision, head pose estimation has been widely applied in both academia and industry. However, there remains two challenges in the field of head pose estimation: (1) even given the same task (e.g., tiredness detection), the ...

    Abstract As an important task in computer vision, head pose estimation has been widely applied in both academia and industry. However, there remains two challenges in the field of head pose estimation: (1) even given the same task (e.g., tiredness detection), the existing algorithms usually consider the estimation of the three angles (i.e., roll, yaw, and pitch) as separate facets, which disregard their interplay as well as differences and thus share the same parameters for all layers; and (2) the discontinuity in angle estimation definitely reduces the accuracy. To solve these two problems, a THESL-Net (tiered head pose estimation with self-adjust loss network) model is proposed in this study. Specifically, first, an idea of stepped estimation using distinct network layers is proposed, gaining a greater freedom during angle estimation. Furthermore, the reasons for the discontinuity in angle estimation are revealed, including not only labeling the dataset with quaternions or Euler angles, but also the loss function that simply adds the classification and regression losses. Subsequently, a self-adjustment constraint on the loss function is applied, making the angle estimation more consistent. Finally, to examine the influence of different angle ranges on the proposed model, experiments are conducted on three popular public benchmark datasets, BIWI, AFLW2000, and UPNA, demonstrating that the proposed model outperforms the state-of-the-art approaches.
    Keywords head pose estimation ; angle estimation discontinuity ; tiered estimation ; loss limitation ; Science ; Q ; Astrophysics ; QB460-466 ; Physics ; QC1-999
    Subject code 004
    Language English
    Publishing date 2022-07-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Ependymal polarity defects coupled with disorganized ciliary beating drive abnormal cerebrospinal fluid flow and spine curvature in zebrafish.

    Haibo Xie / Yunsi Kang / Junjun Liu / Min Huang / Zhicheng Dai / Jiale Shi / Shuo Wang / Lanqin Li / Yuan Li / Pengfei Zheng / Yi Sun / Qize Han / Jingjing Zhang / Zezhang Zhu / Leilei Xu / Pamela C Yelick / Muqing Cao / Chengtian Zhao

    PLoS Biology, Vol 21, Iss 3, p e

    2023  Volume 3002008

    Abstract: Idiopathic scoliosis (IS) is the most common spinal deformity diagnosed in childhood or early adolescence, while the underlying pathogenesis of this serious condition remains largely unknown. Here, we report zebrafish ccdc57 mutants exhibiting scoliosis ... ...

    Abstract Idiopathic scoliosis (IS) is the most common spinal deformity diagnosed in childhood or early adolescence, while the underlying pathogenesis of this serious condition remains largely unknown. Here, we report zebrafish ccdc57 mutants exhibiting scoliosis during late development, similar to that observed in human adolescent idiopathic scoliosis (AIS). Zebrafish ccdc57 mutants developed hydrocephalus due to cerebrospinal fluid (CSF) flow defects caused by uncoordinated cilia beating in ependymal cells. Mechanistically, Ccdc57 localizes to ciliary basal bodies and controls the planar polarity of ependymal cells through regulating the organization of microtubule networks and proper positioning of basal bodies. Interestingly, ependymal cell polarity defects were first observed in ccdc57 mutants at approximately 17 days postfertilization, the same time when scoliosis became apparent and prior to multiciliated ependymal cell maturation. We further showed that mutant spinal cord exhibited altered expression pattern of the Urotensin neuropeptides, in consistent with the curvature of the spine. Strikingly, human IS patients also displayed abnormal Urotensin signaling in paraspinal muscles. Altogether, our data suggest that ependymal polarity defects are one of the earliest sign of scoliosis in zebrafish and disclose the essential and conserved roles of Urotensin signaling during scoliosis progression.
    Keywords Biology (General) ; QH301-705.5
    Subject code 571
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: A Functional SNP in the Promoter of LBX1 Is Associated With the Development of Adolescent Idiopathic Scoliosis Through Involvement in the Myogenesis of Paraspinal Muscles

    Leilei Xu / Zhenhua Feng / Zhicheng Dai / Wayne Y. W. Lee / Zhichong Wu / Zhen Liu / Xu Sun / Nelson Tang / Jack Chun-Yiu Cheng / Yong Qiu / Zezhang Zhu

    Frontiers in Cell and Developmental Biology, Vol

    2021  Volume 9

    Abstract: Previous studies have shown that LBX1 is associated with adolescent idiopathic scoliosis (AIS) in multiple populations. For the first time, rs1322330 located in the putative promoter region of LBX1 was found significantly associated with AIS in the ... ...

    Abstract Previous studies have shown that LBX1 is associated with adolescent idiopathic scoliosis (AIS) in multiple populations. For the first time, rs1322330 located in the putative promoter region of LBX1 was found significantly associated with AIS in the Chinese population [p = 6.08 × 10–14, odds ratio (OR) = 1.42, 95% confidence interval of 1.03–1.55]. Moreover, the luciferase assay and electrophoretic mobility shift assay supported that the allele A of rs1322330 could down-regulate the expression of LBX1 in the paraspinal muscles of AIS. In addition, silencing LBX1 in the myosatellite cells resulted in significantly inhibited cell viability and myotube formation, which supported an essential role of LBX1 in muscle development of AIS. To summarize, rs1322330 may be a novel functional SNP regulating the expression of LBX1, which was involved in the etiology of AIS possibly via regulation of myogenesis in the paraspinal muscles.
    Keywords gene variant ; LBX1 gene ; adolescent idiopathic scoliosis (AIS) ; myogenesis ; paraspinal muscle ; Biology (General) ; QH301-705.5
    Language English
    Publishing date 2021-11-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: An Energy-Aware Cluster-Based Routing Protocol for Wireless Sensor and Actor Network

    Zhicheng Dai / Zhi Li / Bingwen Wang / Qiang Tang

    Information Technology Journal, Vol 8, Iss 7, Pp 1044-

    2009  Volume 1048

    Abstract: In this study, an Energy-Aware Cluster-Based Routing (EACBR) protocol which adapts to the characteristics of WSAN is proposed. Sensors and actors are divided into some clusters and every cluster including an actor and some sensors is considered to ... ...

    Abstract In this study, an Energy-Aware Cluster-Based Routing (EACBR) protocol which adapts to the characteristics of WSAN is proposed. Sensors and actors are divided into some clusters and every cluster including an actor and some sensors is considered to different subnet. The Shortest Path Trees (SPTs) from sensors as resource to actor as destination in every subnet are calculated by Dijkstra algorithm. The process of EACBR protocol is divided into rounds and SPTs are dynamically generated according to network states in each round. The analysis and simulation results show that EACBR protocol can prolong network lifetime and reduce transmission delay.
    Keywords cluster ; energy-aware ; WSAN ; shortest path tree ; Information technology ; T58.5-58.64 ; Industrial engineering. Management engineering ; T55.4-60.8 ; Technology (General) ; T1-995 ; Technology ; T ; DOAJ:Computer Science ; DOAJ:Technology and Engineering
    Language English
    Publishing date 2009-01-01T00:00:00Z
    Publisher Asian Network for Scientific Information
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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