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相关概念视频

Nuclear Fission02:50

Nuclear Fission

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Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large...
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Nuclear Stability03:18

Nuclear Stability

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Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
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Nuclear Power02:36

Nuclear Power

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Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
9.6K
Nuclear Binding Energy02:13

Nuclear Binding Energy

14.9K
The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass defect indicates a “loss” in mass of 4.0331 amu – 4.0026 amu = 0.0305 amu. The loss in mass accompanying the formation of an atom from protons, neutrons, and electrons is due to the conversion of that mass into energy that is evolved as the atom forms. The nuclear binding energy is the energy produced when the atoms’ nucleons are bound...
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Nuclear Export01:42

Nuclear Export

5.1K
The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
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Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

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In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
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相关实验视频

Updated: Feb 28, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
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Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

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人们对核武器的反应:绘制冷战后研究的地图.

Astrid Kause1,2,3, Helen Fischer4, Zia Mian3

  • 1School of Sustainability, Leuphana University Lüneburg.

Perspectives on psychological science : a journal of the Association for Psychological Science
|February 26, 2026
PubMed
概括

随着核武器威胁的增加,心理学家越来越多地研究公众的反应. 研究显示,人们对核武器有新的兴趣,但缺乏一个凝聚在一起的社区来了解核武器的影响.

关键词:
行动行动行动行动行动行动.他们的信仰,他们的信仰.存在的风险存在的风险.感觉 感觉 感觉 感觉 感觉 感觉知识的知识知识的知识.核武器是核武器.系统地绘制地图.

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Production of Synthetic Nuclear Melt Glass
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科学领域:

  • 心理学 心理学 心理学
  • 社会学 社会学 社会学
  • 政治科学 政治科学是指政治学.

背景情况:

  • 全球日益严重的核武器威胁需要了解公众的心理反应.
  • 之前关于这个主题的研究评论已经有30多年了.
  • 对核武器心理反应的实证研究至关重要.

研究的目的:

  • 系统地绘制和分析自冷战以来对核武器的心理反应的经验研究.
  • 评估该领域的出版模式,研究社区,主题和方法论的严谨性.
  • 确定这个研究领域向一个协调的学术领域的演变.

主要方法:

  • 从Web of Science和Scopus数据库中对文章进行系统地映射.
  • 选了18505个初次匹配结果,以确定256个合适的物品.
  • 分析出版模式,作者合作,研究主题 (联名网络) 和方法有效性 (样本大小,验证的措施).

主要成果:

  • 出版物数量的大幅增加表明,人们对研究对核武器的反应有了新的兴趣.
  • 研究领域缺乏一个连贯的社区,其特点是分散的,一次性的研究,而不是协调的努力.
  • 有证据表明,一个新兴的,虽然没有协调的学术领域.

结论:

  • 虽然对对核武器的心理反应的兴趣正在增长,但该领域需要进一步发展,以建立一个连贯的研究社区.
  • 未来的研究应该专注于建立合作和标准化的方法,以提高研究结果的有效性和通用性.
  • 在当前的地缘政治气候中,了解公众对核武器威胁的反应仍然至关重要.