141 research outputs found

    A010: The Effect of Coordinated Bilateral Movements on Selective Attention in Fourth Graders

    Get PDF
    Introduction: Selective attention is a core component of children and adolescents\u27 intelligence and a source of individual differences. The status of selective attention of children and adolescents in China is not optimistic. In foreign countries, coordinated bilateral movement can help improve children’s and adolescents\u27 attention. The fact that Chinese parents, schools, and society know little about coordinated bilateral movement, teachers in Chinese physical education and health programs almost never intentionally train students in this area. Objectives: The purpose of this study was to explore whether coordinated bilateral exercise can improve the selective attention levels of Chinese children and adolescents, so as to facilitate parents and schools to convey a healthy and effective learning and living method for students to carry out efficient exercise. Methods: In this experimental study, various measurement methods and mathematical statistics methods were adopted using the d2 attention test scale as a measurement tool. Fourth grade students of Shenzhen Longhua Central Primary School from class 1 to class 4 were selected as the experimental participants, with 49 students allocated to the experimental class (class 1 and class 2) and 49 students to the control class (class 2 and class 3), with a total of 92 students within the sample. Data were analyzed using SPSS 23.0 software to explore the factors affecting the changes in students\u27 selective attention using analysis of variance tests (ANOVA), repeated measures ANOVA, and paired samples t-tests. Results: There were significant intervention main effects on centralized performance CP (F=6.73, p = 0.003, η² = 0.149) and accuracy E% (F=6.94, p = 0.023, η² = 0.11). There were also significant time main effects on processing speed TN (F=104.72, p \u3c 0.001), overall performance TN-E (F=118.90, p \u3c 0.001), focused performance CP (F=76.37, p \u3c 0.001), processing error rate E% (F=38.95, p \u3c 0.001), and attentional span FR (F=15.61, p \u3c 0.001). Conclusion: The inclusion of short bursts of coordinated bilateral movements to break up classroom routines helped children to maintain and improve their concentration. By helping children find better ways to learn, schools can reduce more self-control issues, which in turn improved the academic performance of all pupils. Engaging pupils in coordinated bilateral movements is an effective strategy for improving the selective attention of children and adolescents

    Research progress and prospects of utilizing carbon-based nanomaterials in enhanced oil recovery

    Get PDF
    Carbon-based nanomaterials have received heightened global interest by petroleum researchers because of their abundant stocks of necessary raw materials, ease of size control, readiness for modification, and high stability. In light of the practical demand for oil development, this study reviews the recent progress in the research of enhancing oil recovery using carbon-based nanomaterials of various dimensions, including carbon dots, carbon nanotubes, carbon nanofibers, and graphene and its derivatives. Moreover, the study elaborates on the application of these materials in high-efficiency oil displacement, profile control and water shutoff, as well as the fracturing process. The related challenges and solutions in practical oil exploration and development are analyzed, and the application prospects of these materials in future oil reservoirs and oilfields are predicted. This review provides valuable theoretical and experimental references for the large-scale application of carbon-based nanomaterials.Document Type: Invited reviewCited as: Shen, M., Zhang, C., Yan, X., Wang, L., Wu, Y., Jin, X. Research progress and prospects of utilizing carbon-based nanomaterials in enhanced oil recovery. Advances in Geo-Energy Research, 2024, 14(3): 201-214. https://doi.org/10.46690/ager.2024.12.0

    HarmonyDream: Task Harmonization Inside World Models

    Full text link
    Model-based reinforcement learning (MBRL) holds the promise of sample-efficient learning by utilizing a world model, which models how the environment works and typically encompasses components for two tasks: observation modeling and reward modeling. In this paper, through a dedicated empirical investigation, we gain a deeper understanding of the role each task plays in world models and uncover the overlooked potential of sample-efficient MBRL by mitigating the domination of either observation or reward modeling. Our key insight is that while prevalent approaches of explicit MBRL attempt to restore abundant details of the environment via observation models, it is difficult due to the environment's complexity and limited model capacity. On the other hand, reward models, while dominating implicit MBRL and adept at learning compact task-centric dynamics, are inadequate for sample-efficient learning without richer learning signals. Motivated by these insights and discoveries, we propose a simple yet effective approach, HarmonyDream, which automatically adjusts loss coefficients to maintain task harmonization, i.e. a dynamic equilibrium between the two tasks in world model learning. Our experiments show that the base MBRL method equipped with HarmonyDream gains 10%-69% absolute performance boosts on visual robotic tasks and sets a new state-of-the-art result on the Atari 100K benchmark. Code is available at https://github.com/thuml/HarmonyDream.Comment: ICML 2024. Code is available at https://github.com/thuml/HarmonyDrea

    Surgical anatomy of sigmoid sinus with evaluation of its venous dominance for advances in preoperative planning

    Get PDF
    Microvascular decompression (MVD) is a widely adopted neurosurgery in treating cranial nerve diseases providing long-term pain relief. Improving surgical techniques has been a focus of recent studies. Venous structures such as the sigmoid sinus are essential to protect, and whose risk of destruction during surgery increases with size. The medical records of patients who went through MRI ahead of MVD surgery between Dec 2020 and Dec 2021 were reviewed. Section area of sigmoid sinus calculated from the MRI plane of auditory nerve showed a right dominance of the sinus. The improved method concerning the relationship between affected side and the dominant sigmoid sinus offered a better bone window and surgical field by planning the operation incision in advance. Intraoperative adjustment of the bone flap was avoided, and the risk of destructing the sigmoid sinus was reduced

    The impact of ferroptosis and ferroptosis-related non-coding RNAs on breast cancer progression

    Get PDF
    Ferroptosis, distinct from apoptosis, is primarily characterized by the accumulation of iron-dependent lipid peroxides (LPO) and reactive oxygen species (ROS). This process plays a pivotal role in the pathophysiology of various diseases and has recently emerged as a promising therapeutic strategy in oncology, garnering significant attention. Non-coding RNAs (ncRNAs), including microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs), serve as crucial regulators in numerous biological processes, particularly in cancer initiation and progression. Increasing research efforts are focused on targeting ferroptosis through modulation of these ncRNAs. This review provides an overview of the mechanisms underlying ferroptosis and explores the roles of ncRNAs in breast cancer (BC) and its regulation. Furthermore, we examine the interactions between ferroptosis and ncRNAs in BC, aiming to identify potential therapeutic targets for BC treatment

    CCL4 participates in the reprogramming of glucose metabolism induced by ALV-J infection in chicken macrophages

    Get PDF
    Interferon and chemokine-mediated immune responses are two general antiviral programs of the innate immune system in response to viral infections and have recently emerged as important players in systemic metabolism. This study found that the chemokine CCL4 is negatively regulated by glucose metabolism and avian leukosis virus subgroup J (ALV-J) infection in chicken macrophages. Low expression levels of CCL4 define this immune response to high glucose treatment or ALV-J infection. Moreover, the ALV-J envelope protein is responsible for CCL4 inhibition. We confirmed that CCL4 could inhibit glucose metabolism and ALV-J replication in chicken macrophages. The present study provides novel insights into the antiviral defense mechanism and metabolic regulation of the chemokine CCL4 in chicken macrophages

    Structure Design of a Spaceborne Module

    Full text link

    Sedimentary Microfacies Types and Patterns of Chang 6 Member of Triassic Yanchang Formation in the Dalugou Area of Jing’an Oilfield in Ordos Basin, China

    No full text
    The sixth member of the Triassic Yanchang Formation (Chang 6 member) in the Dalugou area of the Jing’an Oilfield in the Ordos Basin is a typical ultra-low-permeability lithological reservoir. The Dalugou area has achieved some development progress in the past few years. With the development of the Chang 6 member in the Dalugou area, a better understanding of the sedimentary microfacies and depositional patterns is needed for precise oil development. The purpose of the study of the reservoir description is to understand the reservoir more accurately and provide a solid geological basis for the adjustment of the development strategy of the Chang 6 reservoir. The Chang 6 member of the Triassic Yanchang Formation in the Dalugou area of the Jing’an Oilfield belongs to the subfacies of the delta front, and the reservoir in the study area is mainly the underwater distributary channel deposition. There are two main depositional patterns in the study area: the dendritic sandstone depositional pattern and the lobate sandstone depositional pattern. The study on the sedimentary types and patterns of the Chang 6 member of the Triassic Yanchang Formation in the Dalugou Area of the Jing’an Oilfield can provide significant information for the evaluation of reservoir characterization. Furthermore, the heterogeneity of the Chang 6 reservoir under various depositional patterns has an important influence on oil enrichment
    corecore