network theory

网络理论
  • 文章类型: Journal Article
    正念与改善心理健康和健康有关,尽管基于正念的干预措施的结果参差不齐。一个挑战是对哪些特定过程是正念的核心的理解有限。网络分析提供了一种表征正念核心过程的方法。
    这项研究使用网络分析来确定哪些过程是正念的核心(与其他正念过程具有最强的连通性),这是通过五个方面的正念问卷来衡量的。在项目级别进行分析。数据来自一项基于智能手机应用程序的戒烟正念训练的随机临床试验的基线。
    正念网络中最核心的过程包括,“我认为我的一些情绪是不好或不合适的,我不应该感觉到它们,\“非判断/接受的一个方面;以及\”我可以很容易地把我的信念,意见,和期望转化为文字,\"和\"我很难找到词来描述我的想法,“描述的方面。
    研究结果有助于澄清哪些过程是正念,有助于更好地理解正念的定义,并提出了在基于正念的干预中可能有希望针对的因素。未来的研究应该检查是否可以通过针对这些核心正念过程来改善基于正念的干预措施。
    UNASSIGNED: Mindfulness has been associated with improved psychological well-being and health, although outcomes from mindfulness-based interventions are mixed. One challenge is a limited understanding about which specific processes are core to mindfulness. Network analysis offers a method to characterize the core processes of mindfulness.
    UNASSIGNED: This study used network analysis to identify which processes are central to mindfulness (have the strongest connectivity with other mindfulness processes) as measured by the Five Facets Mindfulness Questionnaire- Short Form, analyzed at the item-level. Data were obtained from baseline of a randomized clinical trial of smartphone app-based mindfulness training for smoking cessation.
    UNASSIGNED: The most central processes in the mindfulness network included, \"I think some of my emotions are bad or inappropriate and I shouldn\'t feel them,\" an aspect of Nonjudgment/acceptance; as well as \"I can easily put my beliefs, opinions, and expectations into words,\" and \"It\'s hard for me to find the words to describe what I\'m thinking,\" aspects of Describing.
    UNASSIGNED: Findings help to clarify which processes are to mindfulness, contributing to a better understanding of the definition of mindfulness, and suggest factors that may be promising to target in mindfulness-based interventions. Future research should examine if mindfulness-based interventions may be improved by targeting these core mindfulness processes.
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  • 文章类型: Journal Article
    背景:压力诱发的排气障碍(ED)与旷工和不良健康结局有关。目前,关于ED的症状如何相互关联以及症状模式是否会影响治疗结果,我们知之甚少.为此,本研究对参与多模式干预的ED患者进行了网络分析.
    方法:这项研究的首要目的是探索疲惫症状之间的内在联系,并找出比其他症状更密切相关的症状。第二个目的是检查治疗无应答者的基线症状网络是否比应答者的基线症状网络更紧密地联系在一起。通过比较各组症状网络中所有绝对偏相关的总和。此比较是基于以下假设进行的:治疗前更紧密相关的症状网络可能表明治疗结果较差。在参与24周多模式治疗计划并随访12个月的大样本患者(n=915)中,基于自我评估的ED症状构建网络模型。
    结果:尽管参与治疗期间症状水平明显下降,但自我评估的疲惫症状之间的内在联系随时间稳定。始终发现精神耐力有限的症状和对需求的负面情绪反应与其他ED症状最密切相关。同时,睡眠质量和易怒与其他疲惫症状弱相关。从基线到治疗结束和12个月随访,整个样本的症状网络变得更加紧密。未发现对治疗无反应者的症状网络比基线时的反应者的症状网络更紧密地联系在一起。
    结论:当前研究的结果表明,精神耐力有限的症状和对需求的负面情绪反应是整个治疗过程中ED的主要症状,而烦躁和睡眠质量的症状似乎与ED的其他症状有微弱的关系。这些发现的含义与概念化有关,评估,和ED的治疗。
    背景:该临床试验已在Clinicaltrials.gov2017-12-02(标识符:NCT03360136)上注册。
    BACKGROUND: Stress-induced Exhaustion Disorder (ED) is associated with work absenteeism and adverse health outcomes. Currently, little is known regarding how the symptoms of ED are interrelated and whether the patterns of symptoms influence treatment outcomes. To this end, the current study applied network analyses on ED patients participating in a multimodal intervention.
    METHODS: The first aim of the study was to explore the internal relationships between exhaustion symptoms and identify symptoms that were more closely related than others. A second aim was to examine whether the baseline symptom network of non-responders to treatment was more closely connected than the baseline symptom networks of responders, by comparing the sum of all absolute partial correlations in the respective groups\' symptom network. This comparison was made based on the hypothesis that a more closely connected symptom network before treatment could indicate poorer treatment outcomes. Network models were constructed based on self-rated ED symptoms in a large sample of patients (n = 915) participating in a 24-week multimodal treatment program with a 12-month follow-up.
    RESULTS: The internal relations between self-rated exhaustion symptoms were stable over time despite markedly decreased symptom levels throughout participation in treatment. Symptoms of limited mental stamina and negative emotional reactions to demands were consistently found to be the most closely related to other ED symptoms. Meanwhile, sleep quality and irritability were weakly related to other exhaustion symptoms. The symptom network for the full sample became significantly more closely connected from baseline to the end of treatment and 12-month follow-up. The symptom network of non-responders to treatment was not found to be more closely connected than the symptom network of responders at baseline.
    CONCLUSIONS: The results of the current study suggest symptoms of limited mental stamina and negative emotional reactions to demands are central ED symptoms throughout treatment, while symptoms of irritability and sleep quality seem to have a weak relation to other symptoms of ED. The implications of these findings are discussed in relation to the conceptualization, assessment, and treatment of ED.
    BACKGROUND: The clinical trial was registered on Clinicaltrials.gov 2017-12-02 (Identifier: NCT03360136).
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  • 文章类型: Journal Article
    急性呼吸窘迫综合征(ARDS)提出了重大的临床挑战,呼吸机诱发的肺损伤(VILI)是挽救生命的机械通气引起的严重并发症。了解VILI的空间和时间动态可以提供治疗策略,以减轻肺损伤并改善预后。
    用Ilastik分割来自最初健康的小鼠和受到第二次VILI打击的肺灌洗损伤的小鼠的组织学切片以限定肺损伤的区域。采用无标度网络方法评估损伤区域之间的相关性,损伤区域表示为网络中的\'节点\'和量化节点之间相关程度的\'边\'。进行了模拟时间序列分析,以模拟损伤事件的时间序列。
    自动分割与手动评分非常吻合地识别出不同的肺部区域,在“伤害”像素中实现78%的灵敏度和85%的特异性。“伤害”的总体准确性,\'空气\',和\'其他\'像素为81%。受伤区域的大小遵循幂律分布,表明肺损伤分布中存在“富人变富”现象。网络分析显示损伤相关性的无标度分布,强调可以作为治疗干预重点的损伤中心。模拟时间序列分析进一步支持了初次侮辱后二次伤害事件的概念,模式类似于地震余震研究中观察到的模式。
    损伤区域的大小分布强调了急性和呼吸机诱导的肺损伤的空间异质性。网络理论的应用证明了与“富人变富”动态相一致的伤害“枢纽”的出现。模拟时间序列分析表明,肺损伤事件的进展可以遵循与地震学中余震进展相似的时空模式,为损伤分布和传播机制提供新的见解。这两种现象都表明了针对这些损伤“枢纽”的干预措施的潜力,以减少VILI在ARDS管理中的影响。
    UNASSIGNED: Acute respiratory distress syndrome (ARDS) presents a significant clinical challenge, with ventilator-induced lung injury (VILI) being a critical complication arising from life-saving mechanical ventilation. Understanding the spatial and temporal dynamics of VILI can inform therapeutic strategies to mitigate lung damage and improve outcomes.
    UNASSIGNED: Histological sections from initially healthy mice and pulmonary lavage-injured mice subjected to a second hit of VILI were segmented with Ilastik to define regions of lung injury. A scale-free network approach was applied to assess the correlation between injury regions, with regions of injury represented as \'nodes\' in the network and \'edges\' quantifying the degree of correlation between nodes. A simulated time series analysis was conducted to emulate the temporal sequence of injury events.
    UNASSIGNED: Automated segmentation identified different lung regions in good agreement with manual scoring, achieving a sensitivity of 78% and a specificity of 85% across \'injury\' pixels. Overall accuracy across \'injury\', \'air\', and \'other\' pixels was 81%. The size of injured regions followed a power-law distribution, suggesting a \'rich-get-richer\' phenomenon in the distribution of lung injury. Network analysis revealed a scale-free distribution of injury correlations, highlighting hubs of injury that could serve as focal points for therapeutic intervention. Simulated time series analysis further supported the concept of secondary injury events following an initial insult, with patterns resembling those observed in seismological studies of aftershocks.
    UNASSIGNED: The size distribution of injured regions underscores the spatially heterogeneous nature of acute and ventilator-induced lung injury. The application of network theory demonstrates the emergence of injury \'hubs\' that are consistent with a \'rich-get-richer\' dynamic. Simulated time series analysis demonstrates that the progression of injury events in the lung could follow spatiotemporal patterns similar to the progression of aftershocks in seismology, providing new insights into the mechanisms of injury distribution and propagation. Both phenomena suggest a potential for interventions targeting these injury \'hubs\' to reduce the impact of VILI in ARDS management.
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  • 文章类型: Journal Article
    我们研究是否有可能使用网络理论来区分混沌时间序列和随机时间序列。从这个角度来看,我们选择了四种方法从时间序列中生成图形:自然,水平的,有限的可穿透水平能见度图,和相空间重构方法。这些方法声称,通过研究生成图的度分布,可以将混沌与随机性区分开。我们通过计算来自2DTorus自同构的混沌时间序列的结果来评估这些方法,混沌的洛伦兹系统,和从正态分布导出的随机序列。尽管结果证实了以前的研究,我们发现,在上述方法的背景下,混沌与随机性的区别通常是不可能的。
    We investigate whether it is possible to distinguish chaotic time series from random time series using network theory. In this perspective, we selected four methods to generate graphs from time series: the natural, the horizontal, the limited penetrable horizontal visibility graph, and the phase space reconstruction method. These methods claim that the distinction of chaos from randomness is possible by studying the degree distribution of the generated graphs. We evaluated these methods by computing the results for chaotic time series from the 2D Torus Automorphisms, the chaotic Lorenz system, and a random sequence derived from the normal distribution. Although the results confirm previous studies, we found that the distinction of chaos from randomness is not generally possible in the context of the above methodologies.
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  • 文章类型: Journal Article
    背景:尽管上下文在实施科学中的重要性没有争议,关于外部环境变量对实施过程的实际影响的知识仍然相当分散。当前框架,模型,研究只是描述宏观层面的障碍和促进者,而不承认它们的动态特征以及它们如何影响和指导实施。将组织理论纳入实施框架可能是解决这一问题的一种方法。在这项研究中,因此,我们研究组织理论如何有助于我们理解外部环境变量如何塑造实施过程。我们以比利时面向目标的初级保健的实施过程为例。
    方法:对来自各种初级保健组织的参与者进行了一项使用深入的半结构化访谈的定性研究。采用迭代方法收集和分析数据。我们评估了四种组织理论的潜力,以丰富我们对外部环境变量对实施过程的影响的理解。评估的组织理论如下:制度理论,资源依赖理论,网络理论,和权变理论。数据分析基于使用NVivo12的归纳和演绎主题分析技术的组合。
    结果:制度理论有助于理解通过监管和政策措施引导和促进目标导向护理实施的机制。例如,佛兰德政府发布了促进更多一体化的政策,通过新成立的机构以人为中心的护理,激励机制,期望,和其他监管因素。其他三种组织理论描述了抵消或增强机制。金融系统阻碍了跨专业合作,这是GOC的关键。初级保健提供者与健康和/或社会护理组织之间的网络一方面促进GOC,而另一方面,缺乏支持跨专业合作的技术。人口老龄化,初级保健中工作量和复杂性的增加等或有变量造成了GOC作为可能答案的情况。
    结论:从组织理论中得出的见解和命题可以用来扩展我们关于外部环境变量如何影响实施过程的知识。这些见解可以与现有的实现框架和模型结合或集成,以提高其解释能力。
    BACKGROUND: Although the importance of context in implementation science is not disputed, knowledge about the actual impact of external context variables on implementation processes remains rather fragmented. Current frameworks, models, and studies merely describe macro-level barriers and facilitators, without acknowledging their dynamic character and how they impact and steer implementation. Including organizational theories in implementation frameworks could be a way of tackling this problem. In this study, we therefore investigate how organizational theories can contribute to our understanding of the ways in which external context variables shape implementation processes. We use the implementation process of goal-oriented primary care in Belgium as a case.
    METHODS: A qualitative study using in-depth semi-structured interviews was conducted with actors from a variety of primary care organizations. Data was collected and analyzed with an iterative approach. We assessed the potential of four organizational theories to enrich our understanding of the impact of external context variables on implementation processes. The organizational theories assessed are as follows: institutional theory, resource dependency theory, network theory, and contingency theory. Data analysis was based on a combination of inductive and deductive thematic analysis techniques using NVivo 12.
    RESULTS: Institutional theory helps to understand mechanisms that steer and facilitate the implementation of goal-oriented care through regulatory and policy measures. For example, the Flemish government issued policy for facilitating more integrated, person-centered care by means of newly created institutions, incentives, expectations, and other regulatory factors. The three other organizational theories describe both counteracting or reinforcing mechanisms. The financial system hampers interprofessional collaboration, which is key for GOC. Networks between primary care providers and health and/or social care organizations on the one hand facilitate GOC, while on the other hand, technology to support interprofessional collaboration is lacking. Contingent variables such as the aging population and increasing workload and complexity within primary care create circumstances in which GOC is presented as a possible answer.
    CONCLUSIONS: Insights and propositions that derive from organizational theories can be utilized to expand our knowledge on how external context variables affect implementation processes. These insights can be combined with or integrated into existing implementation frameworks and models to increase their explanatory power.
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  • 文章类型: Journal Article
    背景:临床计量学和网络分析是两种方法论方法,尽管起源不同,分享改善心理健康临床评估超越经典心理测量学的局限性的目标。尽管他们的共同目标和可比的临床评估概念化,尚未探索这些方法之间的潜在联系和整合。这篇综述的目的是确定临床计量学和网络理论潜在整合的会合点。方法:通过研究临床计量学和网络理论的关键工作并比较两种方法的相似概念,进行了文献综述。结果:确定了临床计量学和网络理论之间的理论和方法论趋同和互补的两个主要领域,如下:临床指标的特点以及评估和组织复杂临床数据的策略。这些主题包括与个体症状对临床表现的影响有关的子主题,纵向条件评估,合并症的影响,和案件制定的标准化程序。结论:结果提供了将这些方法整合在一个单一方法中的潜力的指示,心理和精神疾病概念化和评估的临床导向方法学。尽管文献检索策略存在局限性,该结果为进一步探索开发用于临床评估和治疗计划的综合方法学的潜力提供了基础.
    Background: Clinimetrics and network analysis are two methodological approaches that, despite different origins, share the goal of improving mental health clinical assessment beyond the limitations of classical psychometrics. Despite their common goal and comparable conceptualization of clinical assessment, the potential connection and integration between these approaches has not been explored. The aim of this review is to identify meeting points for the potential integration of clinimetrics and network theory. Methods: A literature review was conducted by examining key works in clinimetrics and network theory and comparing similar concepts from the two approaches. Results: Two main areas of theoretical and methodological convergence and complementarity between clinimetrics and network theory were identified, as follows: the characteristics of clinical indexes and the strategies to assess and organize complex clinical data. These topics encompassed sub-topics related to the influence of individual symptoms on clinical presentation, longitudinal assessment of conditions, influence of comorbidities, and standardized procedures for case formulation. Conclusions: Results provide an indication of the potential for integration for these approaches in a single, clinically oriented methodology for psychological and psychiatric illness conceptualization and assessment. Despite the literature search strategy limitations, the results provide a basis for further exploring the potential for developing an integrated methodology for clinical assessment and treatment planning.
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  • 文章类型: Journal Article
    至少从20世纪初开始,法律学者已经认识到,个人法律行为者之间的权利和其他法律关系,形成一个庞大而复杂的社会网络。然而,没有法律学者使用网络理论的数学机制来形式化这些关系。这里,我们提出了第一个这样的方法,通过建模一个基本的,利用网络理论建立不动产关系的静态集。然后,我们应用我们的玩具模型来衡量模块化水平-本质上,这些不动产关系和相关行为者的群体之间的社区结构。这样做,我们表明,即使对于一组非常基本的关系和行为者来说,法律可以采用模块化结构来管理复杂性。财产,侵权行为,合同,知识产权,和法律的其他领域可以说类似地降低了信息成本,通过将各方之间的交互世界切成可管理的半自主模块,可以量化的方式。我们还认为,我们对法学问题的网络科学方法可以适应量化法律制度的许多其他重要方面。本文是主题问题“法律和治理的复杂性科学方法”的一部分。
    From at least the early twentieth century, legal scholars have recognized that rights and other legal relations inhere between individual legal actors, forming a vast and complex social network. Yet, no legal scholar has used the mathematical machinery of network theory to formalize these relationships. Here, we propose the first such approach by modelling a rudimentary, static set of real property relations using network theory. Then, we apply our toy model to measure the level of modularity-essentially, the community structure-among aggregations of these real property relations and associated actors. In so doing, we show that even for a very basic set of relations and actors, law may employ modular structures to manage complexity. Property, torts, contracts, intellectual property, and other areas of the law arguably reduce information costs in similar, quantifiable ways by chopping up the world of interactions between parties into manageable modules that are semi-autonomous. We also posit that our network science approach to jurisprudential issues can be adapted to quantify many other important aspects of legal systems. This article is part of the theme issue \'A complexity science approach to law and governance\'.
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  • 文章类型: Journal Article
    ICD-11和DSM-5是精神障碍分类的主要系统,以及它们与临床工作和研究的相关性,以及它们对政策制定和法律问题的影响,已经大大增加了。近年来,还提出了其他框架来补充甚至取代ICD和DSM,提出了许多关于临床效用的问题,科学相关性,and,在核心,如何最好地概念化精神障碍。
    作为已经出现的新方法的例子,在这里,我们介绍精神病理学的分层分类(HiTOP),研究领域标准(RDoC),系统和网络方法,基于过程的方法,以及人格障碍分类的新方法。
    我们强调这些分类框架之间的主要区别,很大程度上与不同的优先事项和目标有关,并讨论重叠的领域和潜在的兼容性。这些系统之间的协同作用可能为研究和临床实践提供有希望的新途径。
    UNASSIGNED: The ICD-11 and DSM-5 are the leading systems for the classification of mental disorders, and their relevance for clinical work and research, as well as their impact for policy making and legal questions, has increased considerably. In recent years, other frameworks have been proposed to supplement or even replace the ICD and the DSM, raising many questions regarding clinical utility, scientific relevance, and, at the core, how best to conceptualize mental disorders.
    UNASSIGNED: As examples of the new approaches that have emerged, here we introduce the Hierarchical Taxonomy of Psychopathology (HiTOP), the Research Domain Criteria (RDoC), systems and network approaches, process-based approaches, as well as a new approach to the classification of personality disorders.
    UNASSIGNED: We highlight main distinctions between these classification frameworks, largely related to different priorities and goals, and discuss areas of overlap and potential compatibility. Synergies among these systems may provide promising new avenues for research and clinical practice.
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  • 文章类型: Editorial
    胰岛素从胰腺的分泌依赖于间隙连接和具有特定内在特性的β细胞亚群。
    The secretion of insulin from the pancreas relies on both gap junctions and subpopulations of beta cells with specific intrinsic properties.
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  • 文章类型: Journal Article
    下颌骨或下颌是人类面部骨骼中最大和最坚硬的骨骼。据报道,下颌骨骨折是急诊医学中常见的面部创伤,深入了解不同面部类型的下颌骨形态有助于创伤治疗。此外,下颌骨的特征在识别性别和个体的法医学和人类学中起着重要作用。因此,发现下颌骨的隐藏信息可以有益于跨学科研究。这里,第一次,一种基于人工智能的非线性动力学和网络分析方法用于发现男性和女性受试者下颌骨的不同和相似的放射学特征。使用10个下颌骨计算机断层扫描的公共数据集,结果表明,性别之间的空间自相关分布存在差异,个体之间网络拓扑的唯一性和重复量化中的共享值。
    The mandible or lower jaw is the largest and hardest bone in the human facial skeleton. Fractures of the mandible are reported to be a common facial trauma in emergency medicine and gaining insights into mandibular morphology in different facial types can be helpful for trauma treatment. Furthermore, features of the mandible play an important role in forensics and anthropology for identifying gender and individuals. Thus, discovering hidden information of the mandible can benefit interdisciplinary research. Here, for the first time, a method of artificial intelligence-based nonlinear dynamics and network analysis are used for discovering dissimilar and similar radiographic features of mandibles between male and female subjects. Using a public dataset of 10 computed tomography scans of mandibles, the results suggest a difference in the distribution of spatial autocorrelation between genders, uniqueness in network topologies among individuals and shared values in recurrence quantification.
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