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関連する概念動画

What is Natural Selection?01:32

What is Natural Selection?

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Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
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Nature and Nurture01:10

Nature and Nurture

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Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
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Theory of Attribution I: Correspondent Inference Theory01:15

Theory of Attribution I: Correspondent Inference Theory

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Correspondent inference theory, proposed by Jones and Davis in 1965, seeks to explain how individuals infer stable personality traits from observed behaviors. It suggests that people attribute actions to underlying dispositions rather than external circumstances, particularly when the behavior appears intentional and socially significant.Voluntary Behavior and Dispositional AttributionAccording to this theory, individuals are more likely to attribute behavior to personal traits when it appears...
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Dynamic Equilibrium02:20

Dynamic Equilibrium

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A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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Chirality in Nature02:30

Chirality in Nature

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Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
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Statistical Inference Techniques in Hypothesis Testing: Parametric Versus Nonparametric Data01:16

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Statistical inference techniques, paramount in hypothesis testing, differentiate into two broad categories: parametric and nonparametric statistics.
Parametric statistics, as the name suggests, assumes that data follow a specific distribution, often a normal distribution. This assumption enables robust hypothesis testing and estimation. Parametric methods, like the Student's t-test or Goodness-of-fit test, are frequently employed in biostatistics due to their robustness. For instance,...
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自然のシーンのセグメンテーションダイナミクスは,反復的なベイジアン推論を明らかにします.

Tridib K Biswas, Jonathan Vacher, Sophie Molholm

    bioRxiv : the preprint server for biology
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    まとめ
    この要約は機械生成です。

    自然画像に対する人間の視覚的セグメンテーションダイナミクスを測定した. イテラティブ・ベイジアン推論アルゴリズムは,これらのダイナミクスを説明し,視覚入力が空間的期待と一致するときにより速い処理を示します.

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    A Novel Bayesian Change-point Algorithm for Genome-wide Analysis of Diverse ChIPseq Data Types
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    科学分野:

    • 神経科学は神経科学である.
    • コグニティブ・サイエンス コグニティブ・サイエンス
    • コンピュータビジョン コンピュータビジョン

    背景:

    • 視覚系は,インプットを感知対象に分割する.
    • セグメンテーションのダイナミクスは,知覚の選択と神経活動において観察可能である.
    • 自然刺激のダイナミクスは,曖昧さのためにほとんど理解されていません.

    研究 の 目的:

    • 自然画像のための主観的な人間のセグメンテーションマップを測定するために.
    • 現在の理論が予測するよりも豊かな時空力学を明らかにする.
    • 計算モデルを用いて観察された動態を説明する.

    主な方法:

    • 主観的な人間のセグメンテーションマップを測定するための革新的なパラダイムを開発しました.
    • セグメンテーションのためのIterative Bayesian Inferenceアルゴリズムを導入しました.
    • 空間的なコンパクト性の前提で統合されたビジュアルインプット.

    主要な成果:

    • 既存の理論によって予測されたより豊かな時空ダイナミクスを発見した.
    • 繰り返し推論は,ビジュアル入力が空間的プリオアと一致するときに,より速いことが実証されました.
    • この関係は,個々の参加者の空間的バイアスを反映していることが確認されました.

    結論:

    • イテレーティブ・ベイジアン推論は,自然視力のセグメンテーションの重要なメカニズムである.
    • このプロセスは,基本的な視覚機能のテンポを設定します.
    • コンピューティングモデルは,複雑な知覚のダイナミクスを説明することができます.