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関連する概念動画

Cell Size01:22

Cell Size

132.0K
Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
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Brick Sizes01:21

Brick Sizes

353
Brick sizing plays a crucial role in construction, influencing both the aesthetics and structural integrity of buildings. Bricks are defined by three dimensions: width, thickness, and length. They are commonly designed to fit modular measurements, typically in multiples of 4 inches or 8 inches in width, to facilitate uniform construction and compatibility with other building materials.
Modular bricks are the most common type and are sized to include the mortar joint, which is essential for...
353
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

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While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
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Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

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Maximum Size of Aggregate01:12

Maximum Size of Aggregate

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The maximum size of aggregate is defined as the aperture of the sieve retaining 15 percent or more of the particles present in the aggregate sample. The aggregate's maximum size impacts the concrete's water requirement, workability, and strength. Larger aggregates reduce the surface area needing cement paste coverage, which can lower water needs, thereby allowing a decrease in the water-to-cement ratio when the desired workability and richness of the mix are to be maintained, which can...
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Sample Size Calculation01:19

Sample Size Calculation

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Knowledge of the sample size is the first requirement to conduct random sampling or an experiment. The sample size is the total number of units, observations, or groups (in some cases) used to get the data to estimate a population parameter. As the name suggests, the sample size is that of the sample drawn from the population and differs from the population size.
The sample size for the given experiment or sampling effort is fundamental to any study design. Sample size decides the number of...
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BrainEffeX: fMRI効果サイズを探求するためのWebアプリ.

Hallee Shearer1, Matt Rosenblatt2, Jean Ye3

  • 1Department of Psychology, Northeastern University.

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|February 12, 2026
PubMed
まとめ
この要約は機械生成です。

この研究は,機能MRI (fMRI) 研究における効果サイズを推定するためのインタラクティブなウェブアプリであるBrainEffeXを紹介しています. これは,一般的なfMRI設計の正確な見積もりを提供し,実験計画と電力分析を支援します.

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科学分野:

  • ニューロ画像は,神経イメージングです.
  • 認知神経科学とは
  • データサイエンス データサイエンス

背景:

  • 効果の大きさの推定は,fMRI パワー分析と実験設計に不可欠です.
  • fMRIデータの複雑性と分析技術は,効果サイズを正確に推定するためのユニークな課題を提示します.
  • 既存のツールは,fMRI効果サイズ探査の特定のニーズに適切に対応していない可能性があります.

研究 の 目的:

  • 機能的なMRI (fMRI) エフェクトマップを調査するためのインタラクティブなウェブアプリケーション,BrainEffeXを導入します.
  • 共通のfMRI研究設計のための正確なヴォクセル賢明で多変量効果サイズ推定を提供するために.
  • fMRI研究コミュニティのための協力的で成長するリソースを作成します.

主な方法:

  • 強力な効果サイズ計算のために,大規模なfMRIデータセット (n > 500) を利用しました.
  • 典型的なfMRI設計の効果サイズを計算した:脳行動相関,タスク対休息のコントラスト,機能的接続性の分析.
  • これらの効果マップを視覚化・探索するためのインタラクティブなウェブアプリケーション (neuroprismlab.shinyapps.io/BrainEffeX) を開発しました.

主要な成果:

  • 大量のfMRIデータセットから,精密なvoxel-wiseおよび多変量効果サイズ推定を生成しました.
  • アクティベーションと接続マップを含むさまざまなfMRI分析タイプにおけるアプリケーションの有用性を実証しました.
  • 標準的なfMRI研究パラダイムにおける効果サイズを理解するための基本的なリソースを確立しました.

結論:

  • BrainEffeXは,研究者がfMRI効果のサイズを探求し,実験設計を伝えるための貴重なツールを提供します.
  • このアプリケーションは,典型的なfMRI研究における効果の大きさのより深い理解を容易にする.
  • 大規模なデータセットのコミュニティの貢献を奨励し,リソースの範囲と精度を拡大します.