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相关概念视频

The Nativist Approach01:21

The Nativist Approach

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The nativist approach to infant cognitive development proposes that infants are born with inherent knowledge structures that allow them to interpret the world almost immediately. This perspective contrasts with earlier developmental theories, such as those proposed by Jean Piaget, which emphasized a more gradual acquisition of cognitive abilities through interaction with the environment. One key concept in this approach is object permanence — the understanding that objects continue to...
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What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
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Causality in Epidemiology01:21

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Causality or causation is a fundamental concept in epidemiology, vital for understanding the relationships between various factors and health outcomes. Despite its importance, there's no single, universally accepted definition of causality within the discipline. Drawing from a systematic review, causality in epidemiology encompasses several definitions, including production, necessary and sufficient, sufficient-component, counterfactual, and probabilistic models. Each has its strengths and...
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Phylogeny01:23

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Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
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Criteria for Causality: Bradford Hill Criteria - II01:28

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The Bradford Hill criteria serve as guidelines for establishing causative links in epidemiological research. Beyond Strength, Consistency, Specificity, and Temporality, key criteria also include Biological Gradient, Plausibility, Coherence, Experiment, and Analogy. These principles assist scientists in assessing the likelihood of causation in complex biological contexts. Below is a summary of these concepts:
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If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...
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相关实验视频

Updated: Jul 8, 2025

Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
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嵌套在互动网络中的时间起源.

Phillip P A Staniczenko1, Debabrata Panja2,3

  • 1Department of Biology, Brooklyn College, City University of New York, Brooklyn, NY 11210, USA.

PNAS nexus
|December 11, 2023
PubMed
概括

一个新的模型表明,相互作用的时间 (现象学) 可以产生嵌套的网络结构. 这种现象学模型成功地预测了鱼类市场和植物传粉者网络中的许多相互作用.

科学领域:

  • 生态生态学 生态生态学
  • 网络科学 网络科学
  • 数学生物学 数学生物学

背景情况:

  • 嵌套性是各种复杂系统中普遍存在的特性,包括生态网络.
  • 高嵌套性意味着较少连接的节点与连接到更多连接的节点的合作伙伴的子集相互作用.
  • 了解产生嵌套性的机制对于将系统过程与网络结构联系起来至关重要.

研究的目的:

  • 研究复杂网络中嵌套的基础机制.
  • 开发和测试用于生成嵌套网络结构的概率模型.
  • 将现象时间与网络嵌套性和相互作用可预测性联系起来.

主要方法:

  • 基于现象学 (相互作用的时间) 开发了一个概率模型.
  • 将模型应用于鱼类市场和植物授粉者网络的经验数据.
  • 评估模型预测网络交互的能力.

主要成果:

  • 基于现象学的模型成功生成了嵌套结构.
  • 该模型预测了鱼类市场网络中约三分之二的相互作用.
  • 该模型预测了植物授粉者网络中约三分之一的相互作用.

结论:

关键词:
复杂的系统复杂的系统.互动网络互动网络.嵌套性 嵌套性 嵌套性

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  • 现象定时是推动互动网络中的嵌套性的关键机制.
  • 由于现象学的频繁共发生,形成了嵌套相互作用的核心结构.
  • 机会主义互动和合作伙伴偏好解释了剩余的网络链接.