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関連する概念動画

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of motion,...
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Divergence and Curl of Magnetic Field01:26

Divergence and Curl of Magnetic Field

The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:

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関連する実験動画

Updated: Jul 12, 2026

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
13:44

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Published on: August 30, 2013

フラクタルと宇宙学的大規模な構造.

X Luo, D N Schramm

    Science (New York, N.Y.)
    |April 24, 1992
    PubMed
    まとめ

    宇宙 宇宙 宇宙 宇宙 宇宙 宇宙

    科学分野:

    • コスモロジー・コスモロジーとは
    • 天体物理学 天体物理学
    • 大規模な構造の形成の大規模な構造の形成

    背景:

    • 銀河と星団の相関は,宇宙の大規模な構造を明らかにします.
    • これらの構造は,特定のスケールでフラクタル特性を示す.

    研究 の 目的:

    • 大規模構造のフラクタル次元を分析する.
    • フラクタル特性に基づく宇宙構造形成のモデルを制約する.

    主な方法:

    • 観測された銀河間銀河とクラスター・クラスターの相関を限定フラクタルモデルに合わせる.
    • 構造成長プロセスに対するフラクタル次元の影響を分析する.

    主要な成果:

    • 大規模構造は,次元D ≈ 1.2.の"限られた"フラクタルである.
    • フラクタルの振る舞いは,大規模なスケールのランダム分布に移行する.
    • 観測されたフラクタル次元は,2Dシート型のオブジェクトからの成長を示唆しています.

    結論:

    • 宇宙構造のフラクタル次元は,形成メカニズムに制約を与える.
    • 大規模構造の成長は,パンケーキやドメインの壁のような2Dの前駆者から始まった可能性が高い.

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    Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.
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    Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.

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    Generating a Fractal Microstructure of Laminin-111 to Signal to Cells
    06:56

    Generating a Fractal Microstructure of Laminin-111 to Signal to Cells

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    関連する実験動画

    Last Updated: Jul 12, 2026

    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
    13:44

    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

    Published on: August 30, 2013

    Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.
    22:27

    Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.

    Published on: May 6, 2010

    Generating a Fractal Microstructure of Laminin-111 to Signal to Cells
    06:56

    Generating a Fractal Microstructure of Laminin-111 to Signal to Cells

    Published on: September 28, 2020