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Stereotype Content Model02:16

Stereotype Content Model

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The Stereotype Content Model (SCM) was first proposed by Susan Fiske and her colleagues (Fiske, Cuddy, Glick & Xu, 2002; see also Fiske, 2012 and Fiske, 2017). The SCM specifies that when someone encounters a new group, they will stereotype them based on two metrics: warmth—or that group’s perceived intent, and how likely they are to provide help or inflict harm—and competence—or their ability to carry out that objective. Depending on the warmth-competence...
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Metacognition01:26

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Metacognition is a conscious process where individuals are aware of their cognitive and executive processes, such as planning before solving a problem or self-monitoring during reading. For instance, a writer may need help with composing a piece. The situation involves a writer who is working on a piece of writing, but while doing so, they realize that something is missing. They notice that their characters lack depth or details. This realization occurs because the writer is reflecting on their...
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Microtubule Associated Proteins (MAPs)01:42

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Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
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Concepts and Prototypes01:24

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The human nervous system handles vast amounts of information by translating sensory stimuli into neural impulses, which the brain processes, creating thoughts expressed through language or stored as memories. The brain also synthesizes information from emotions and memories, which significantly influence thoughts and behaviors. This intricate process creates a comprehensive mental picture.
The brain organizes this information using concepts, which are mental categories grouping linguistic data,...
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Schemas01:42

Schemas

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A schema is a mental construct consisting of a cluster or collection of related concepts (Bartlett, 1932). There are many different types of schemata, and they all have one thing in common: schemata are a method of organizing information that allows the brain to work more efficiently. When a schema is activated, the brain makes immediate assumptions about the person or object being observed.
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Metastasis

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Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
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Augmenting Large Language Models via Vector Embeddings to Improve Domain-Specific Responsiveness
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在Twitter上使用MetaMap启用语义主题建模

Rebecca Shyu1, Chunhua Weng1

  • 1Department of Biomedical Informatics, Columbia University, New York, New York.

AMIA Joint Summits on Translational Science proceedings. AMIA Joint Summits on Translational Science
|June 3, 2024
PubMed
概括

像MetaMap这样的概念注释工具可以在杂的社交媒体数据上改进主题建模. 使用UMLS概念标准化的推特增强了语义分析和主题发现,优于传统方法.

科学领域:

  • 计算语言学 计算语言学
  • 社交媒体分析 社交媒体分析
  • 生物信息学是一种生物信息学.

背景情况:

  • 话题建模与X等社交媒体平台上常见的简短,非正式文本作斗争.
  • 现有的方法往往无法在杂的数据集中捕捉微妙的含义.

研究的目的:

  • 评估MetaMap在增强社交媒体数据语义主题建模方面的有效性.
  • 使用原始tweet与使用标准化UMLS概念唯一标识符 (CUI) 的tweet进行主题建模性能比较.

主要方法:

  • 作为一个案例研究,利用了56,017条提及"化"的推文 (03/01/2020-12/31/2021).
  • 应用MetaMap来提取和编码概念作为UMLS CUIs.
  • 在原始和CUI编码的数据集上使用隐藏的迪里克莱特分配 (LDA) 进行主题建模.

主要成果:

  • 与基线模型相比,MetaMap辅助的LDA模型显示出更高的连贯性和代表性.
  • 语义方法成功地确定了与并发的社会和政治话语相关的主题.
  • 通过UMLS CUIs进行标准化显著提高了主题模型性能.

结论:

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  • 将MetaMap与主题建模集成,可以增强对社交媒体文本的语义理解.
  • 标准化UMLS概念是一种可行的策略,可以减轻噪音,并改善像X这样的平台上的主题发现.
  • 这种方法为分析复杂的真实世界文本数据提供了更好的性能.