networks

Networks
  • 文章类型: Journal Article
    目的:选择基于共识的一组相关且可行的指标,以监测和提高区域ICU网络协作的质量。
    方法:2022年4月至7月在荷兰进行了三轮Delphi研究。一个多学科专家小组在两轮问卷中优先考虑潜在相关和可行的指标,两轮之间举行两次共识会议。使用RAND/UCLA适当性方法对指标进行分类并综合结果。最终在两个ICU网络中测试了具有基于共识的相关性和可行性水平的最高排名指标的核心集,以评估其可测量性。
    结果:24项指标被认为是相关和可行的。为衡量该地区标准化死亡率的核心集选择了七个指标(n=1),并评估了存在,描述网络结构和政策协议的正式计划的内容和/或后续行动(n=3),长期网络愿景声明(n=1),和网络会议,以反思和学习成果数据(n=2)。实践测试导致了较小的重新制定。
    结论:本研究根据各种专家的集体意见,为监测和提高ICU网络协作质量提供了相关且可行的指标。指示符可以帮助有效地管理这样的网络。
    To select a consensus-based set of relevant and feasible indicators for monitoring and improving the quality of regional ICU network collaboratives.
    A three-round Delphi study was conducted in the Netherlands between April and July 2022. A multidisciplinary expert panel prioritized potentially relevant and feasible indicators in two questionnaire rounds with two consensus meetings between both rounds. The RAND/UCLA appropriateness method was used to categorize indicators and synthesize results. A core set of highest ranked indicators with consensus-based levels of relevance and feasibility were finally tested in two ICU networks to assess their measurability.
    Twenty-four indicators were deemed as relevant and feasible. Seven indicators were selected for the core set measuring the standardized mortality rate in the region (n = 1) and evaluating the presence, content and/or follow-up of a formal plan describing network structures and policy agreements (n = 3), a long-term network vision statement (n = 1), and network meetings to reflect on and learn from outcome data (n = 2). The practice tests led to minor reformulations.
    This study generated relevant and feasible indicators for monitoring and improving the quality of ICU network collaboratives based on the collective opinion of various experts. The indicators may help to effectively govern such networks.
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  • 文章类型: Journal Article
    围绕人脑功能网络组织的许多最新发展都集中在跨个体群体平均的数据上。虽然这种群体层面的方法已经为大脑的大规模分布式系统提供了相当大的启示,他们掩盖了网络组织中的个体差异,最近的工作已经证明是普遍和广泛的。这种个体差异在组分析中产生噪音,它们可以将作为参与者之间不同功能系统一部分的区域平均在一起,限制可解释性。然而,成本和可行性限制可能会限制研究中个体水平映射的可能性。在这里,我们的目标是利用有关个人水平的大脑组织的信息来概率映射常见的功能系统,并确定高受试者间共识的位置,以用于组分析。我们在具有相对较高数据量的多个数据集中概率映射了14个功能网络。所有网络都显示“核心”(高概率)区域,但在它们的高变异性成分的程度上彼此不同。这些模式在具有不同参与者和扫描参数的四个数据集上很好地复制。我们从这些概率图产生了一组高概率感兴趣区域(ROI);这些和概率图公开可用,以及用于查询与任何给定皮质位置相关联的网络成员资格概率的工具。这些定量估计和公共工具可以允许研究人员将关于受试者间共识的信息应用于他们自己的功能磁共振成像研究。改进对系统及其功能专业化的推论。
    Many recent developments surrounding the functional network organization of the human brain have focused on data that have been averaged across groups of individuals. While such group-level approaches have shed considerable light on the brain\'s large-scale distributed systems, they conceal individual differences in network organization, which recent work has demonstrated to be common and widespread. This individual variability produces noise in group analyses, which may average together regions that are part of different functional systems across participants, limiting interpretability. However, cost and feasibility constraints may limit the possibility for individual-level mapping within studies. Here our goal was to leverage information about individual-level brain organization to probabilistically map common functional systems and identify locations of high inter-subject consensus for use in group analyses. We probabilistically mapped 14 functional networks in multiple datasets with relatively high amounts of data. All networks show \"core\" (high-probability) regions, but differ from one another in the extent of their higher-variability components. These patterns replicate well across four datasets with different participants and scanning parameters. We produced a set of high-probability regions of interest (ROIs) from these probabilistic maps; these and the probabilistic maps are made publicly available, together with a tool for querying the network membership probabilities associated with any given cortical location. These quantitative estimates and public tools may allow researchers to apply information about inter-subject consensus to their own fMRI studies, improving inferences about systems and their functional specializations.
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  • 文章类型: Journal Article
    In a network, a distributed consensus algorithm is fully characterized by its weighting matrix. Although there exist numerical methods for obtaining the optimal weighting matrix, we have not found an in-network implementation of any of these methods that works for all network topologies. In this paper, we propose an in-network algorithm for finding such an optimal weighting matrix.
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  • 文章类型: Consensus Development Conference
    A role for the cerebellum in causing ataxia, a disorder characterized by uncoordinated movement, is widely accepted. Recent work has suggested that alterations in activity, connectivity, and structure of the cerebellum are also associated with dystonia, a neurological disorder characterized by abnormal and sustained muscle contractions often leading to abnormal maintained postures. In this manuscript, the authors discuss their views on how the cerebellum may play a role in dystonia. The following topics are discussed: The relationships between neuronal/network dysfunctions and motor abnormalities in rodent models of dystonia. Data about brain structure, cerebellar metabolism, cerebellar connections, and noninvasive cerebellar stimulation that support (or not) a role for the cerebellum in human dystonia. Connections between the cerebellum and motor cortical and sub-cortical structures that could support a role for the cerebellum in dystonia. Overall points of consensus include: Neuronal dysfunction originating in the cerebellum can drive dystonic movements in rodent model systems. Imaging and neurophysiological studies in humans suggest that the cerebellum plays a role in the pathophysiology of dystonia, but do not provide conclusive evidence that the cerebellum is the primary or sole neuroanatomical site of origin.
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