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Related Concept Videos

Summation Notation01:25

Summation Notation

Sigma notation, also known as summation notation, provides a concise method for representing the sum of a sequence of terms that follow a regular pattern. It utilizes the uppercase Greek letter sigma (∑), A typical expression is:In this form, k the index of summation is 1, the starting value, and n the ending value. The term ak​ represents the general term of the sequence.For example, the increasing sequence 5, 7, 9, ..., 23 over 10 terms can be expressed as:This simplifies the representation...
5-Number Summary01:04

5-Number Summary

In a dataset, the 5-number summary includes the minimum data value, the data value of the first quartile, the median data value or data value of the second quartile, the data value of the third quartile, and the maximum data value. These 5 data values can be visualized as a box and whisker plot.
In a box plot, the minimum and maximum data values represent the lower and upper whiskers in the graph, and the median is designated as the center of the box in the chart. The first quartile and third...
Sum and Difference OpAmps01:22

Sum and Difference OpAmps

Operational amplifiers (op-amps) are versatile devices that extend beyond amplification. In this context, two specific op-amp configurations are explored: the summing and difference amplifiers.
A summing amplifier, or an adder, utilizes an op-amp to merge multiple input signals into a single output signal. When audio signals are introduced into its input channels, the input resistors initiate currents that traverse feedback resistors, resulting in an output voltage. Applying Kirchhoff's current...
Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
Sums of Power01:22

Sums of Power

In definite integration, Riemann sums approximate the area under a curve by dividing it into subintervals and summing the areas of rectangles. When these approximations follow predictable numerical patterns, such as arithmetic or polynomial sequences, sum formulas offer a more efficient and accurate way to compute the result. In particular, the sum of consecutive integers, squares, and cubes plays an essential role in simplifying these calculations, especially when dealing with uniform...
Flashbulb Memory01:16

Flashbulb Memory

A flashbulb memory is a highly vivid and detailed memory, often linked to events of significant emotional impact. These memories stand out in contrast to everyday memories due to their clarity and the precision with which they are recalled. The strong emotions associated with the event act as a catalyst, ensuring that specific details, such as one's location, actions, and even peripheral elements, are etched into memory with remarkable accuracy. For example, many people can vividly recall where...

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Related Experiment Video

Updated: May 29, 2026

Confocal Live Imaging of Shoot Apical Meristems from Different Plant Species
06:46

Confocal Live Imaging of Shoot Apical Meristems from Different Plant Species

Published on: March 29, 2019

SUMA.

Ziad S Saad1, Richard C Reynolds

  • 1Scientific and Statistical Computing Core, National Institute of Mental Health, National, Institutes of Health, Bethesda, MD 20892-1148, USA. saadz@mail.nih.gov

Neuroimage
|September 28, 2011
PubMed
Summary
This summary is machine-generated.

Surface-based brain analysis using SUMA enhances statistical power and visualization of brain activity. This open-source software facilitates group analyses and handling large datasets with ease.

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Serial Block-Face Scanning Electron Microscopy (SBEM) for the Study of Dendritic Spines
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Last Updated: May 29, 2026

Confocal Live Imaging of Shoot Apical Meristems from Different Plant Species
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Published on: March 29, 2019

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Serial Block-Face Scanning Electron Microscopy (SBEM) for the Study of Dendritic Spines

Published on: October 2, 2021

Area of Science:

  • Neuroimaging
  • Computational Neuroscience

Background:

  • Surface-based brain imaging analysis offers advantages over traditional volumetric methods.
  • Key benefits include preserved cortical activation topology, increased statistical power, and enhanced visualization.
  • The development of specialized software is crucial for advancing these techniques.

Observation:

  • SUMA (Surface-based Unified Measurement and Analysis) is an open-source software suite for surface-based analysis and visualization.
  • It provides fine control over volume-to-surface mapping and simultaneous display of multiple datasets.
  • SUMA maintains a direct link to the original volumetric data.

Findings:

  • SUMA offers tools for spatial operations like smoothing, clustering, and ROI drawing on 3D surfaces.
  • It supports advanced fMRI statistics, including FDR and FWE corrections for multiple comparisons.
  • A key feature is mesh standardization, which simplifies group-level analyses.

Implications:

  • SUMA's design facilitates efficient handling of large neuroimaging datasets.
  • Its ability to control the graphical interface externally enhances workflow automation.
  • SUMA is poised to advance group-level surface-based brain imaging analyses and discoveries.