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関連する概念動画

Blinding01:11

Blinding

2.6K
Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
2.6K
Mutations01:35

Mutations

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
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Radiation: Applications01:17

Radiation: Applications

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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
1.2K
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

3.2K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Hot Weather Concreting01:20

Hot Weather Concreting

122
Concreting at elevated temperatures accelerates the hydration process, leading to quicker setting but potentially reducing the long-term strength of the concrete structure. Additionally, low air humidity fosters rapid moisture loss from the concrete, resulting in reduced workability, pronounced plastic shrinkage, and a higher likelihood of crazing.
Mitigating the heat increase in concrete can be economically achieved by shading aggregate stockpiles to prevent heating from solar radiation,...
122
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

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Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
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関連する実験動画

Updated: Sep 4, 2025

Measuring the Behavioral Effects of Intraocular Scatter
05:10

Measuring the Behavioral Effects of Intraocular Scatter

Published on: February 18, 2021

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太陽の輝きの中で

Scott S Sheppard1

  • 1Earth and Planets Laboratory, Carnegie Institution for Science, Washington, DC 20015, USA.

Science (New York, N.Y.)
|July 21, 2022
PubMed
まとめ

ツワイライトの小惑星探査で 太陽に近い小惑星が発見されました これらの発見は金星と似た軌道にあり 太陽系内部の物体の理解を広げています

科学分野:

  • 太陽系探査
  • 小惑星検出
  • 日近天体研究

背景:

  • 内部太陽系,特に太陽に近い地域は,観測が難しいままです.
  • 惑星防衛と太陽系形成の研究において,これらの領域の小惑星の集団を理解することは極めて重要です.

研究 の 目的:

  • 夕暮れ時に太陽系内部の小惑星を検出する可能性を調査する.
  • 金星の軌道の近くにある小惑星を特定し,特徴づけること.

主な方法:

  • 特殊な望遠鏡と観測技術を活用して 文明の夕暮れ時に小惑星を探します
  • 小惑星の発見を確認するために,天文測定と軌道決定を使用します.

主要な成果:

  • いくつかの小惑星は,金星に近い軌道で発見されました.
  • これらの発見は,太陽に近い小惑星を発見するための夕暮れ調査の有効性を示しています.

結論:

  • ツワイライト観測は 困難な太陽系内部の小惑星を発見する 有効な方法です
  • この金星を襲う小惑星の発見は 危険な近地天体の調査に寄与しています

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