Term Extraction
Term Extraction - Related Videos
01:05
Long-term Depression
0 Views •
2019
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory. Calcium Ion Concentration Mechanism If over time, all...
02:55
Extraction - Concepts
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2020
Extraction Extraction is a common technique used in organic chemistry to isolate a target compound. In the extraction process, a solute is transferred from one phase to another to separate it from unreacted starting materials or impurities. Extraction is also used to facilitate the isolation of a solute from a reaction solvent that is difficult to remove by evaporation, such as a solvent with a high boiling point. Generally, there are three types of extractions. First, in solid-liquid...
03:41
In Vitro Calcium Imaging in Short-Term and Long-Term Rat Hippocampal Cultures
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2025
Source: Calvo-Rodríguez, et al. Fluorescence and Bioluminescence Imaging of Subcellular Ca2+ in Aged Hippocampal Neurons. J. Vis. Exp. (2015). This video demonstrates the use of fluorescence imaging to measure cytosolic calcium levels in short-term and long-term rat hippocampal cultures. By comparing young and aged neurons, it highlights how increased L-type voltage-gated calcium channel density and prolonged activation in aged neurons result in calcium overloading, a hallmark of neuronal aging.
06:42
Extraction of Biomarkers from Sediments - Accelerated Solvent Extraction
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst The distribution of a group of organic biomarkers called glycerol-dialkyl glycerol-tetraethers (GDGTs), produced by a suite of archaea and bacteria, were found in modern sediments to change in a predictable manner in response to air or water temperature1,2. Therefore, the distribution of these biomarkers in a sequence of sediments of known age can be used to reconstruct the evolution of air and/or water temperature on...
09:58
C. elegans Positive Butanone Learning, Short-term, and Long-term Associative Memory Assays
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Cited by 99 •
2011
Here we describe methods to test C. elegans associative learning and short- and long-term associative memory. These population assays employ the worms abilities to chemotax toward volatile odorants, and form positive associations upon pairing food with the chemoattractant butanone. Increasing the number of conditioning periods induces long-term memory.
FAQs
Term extraction usually combines two kinds of evidence: linguistic structure and corpus-based measurement. Part-of-speech patterns help identify candidate expressions that function as meaningful terms, while frequency, co-occurrence, and domain relevance indicate whether those candidates are prominent and specialized. Using both perspectives reduces reliance on either grammar or raw repetition alone.
Multiword expressions matter because behavioral descriptions often depend on combinations of words rather than isolated tokens. Co-occurrence measures help identify phrases that repeatedly appear together, allowing analysis to preserve expressions related to actions, motivations, social interactions, or observable responses. This can produce more informative units for later coding and text-mining tasks.
Domain relevance helps prioritize words and expressions that are characteristic of the material being studied, rather than terms that are merely frequent in general. In behavioral research, this emphasis can bring forward vocabulary associated with actions, motivations, social interactions, and observable responses. The resulting term set is therefore better aligned with the subject being analyzed.
A practical workflow begins with unstructured material such as interviews, field notes, or scientific literature, then applies linguistic patterns and statistical measures to identify candidate terms. Researchers can organize the resulting terms into a searchable dataset or use them as inputs for qualitative coding, behavioral classification, or text mining. The output is an organized representation of recurring language.
Term extraction can be applied across interviews, field notes, and scientific literature, making it useful when behavioral evidence is distributed across different kinds of text. Researchers can examine recurring descriptions across these sources and use the extracted terms to organize specialized knowledge. This organization supports text mining, qualitative coding, and research synthesis across varied behavioral materials.
Extracted terms can help investigators track language about actions, motivations, social interactions, and observable responses. In practice, these terms may become categories for qualitative coding, features for behavioral classification, or entries in a searchable dataset. Their value lies in turning recurring descriptions into organized research material that can support analysis of how behavioral patterns are represented in text.