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相关概念视频

Psychodynamic Perspectives on Personality01:27

Psychodynamic Perspectives on Personality

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The psychodynamic perspective in psychology asserts that most personality functions operate unconsciously, outside of awareness. This means that the motives and emotions driving behavior often remain hidden, automatically buried in the unconscious mind as a defense mechanism to shield us from psychological distress. According to this theory, the unconscious mind contains thoughts, memories, and emotions that are too disturbing to face directly.
Psychodynamic theorists argue that unconscious...
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Social Cognitive Perspective on Personality01:30

Social Cognitive Perspective on Personality

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Social cognitive perspectives on personality emphasize the importance of conscious awareness, beliefs, expectations, and goals in shaping behavior. These perspectives incorporate behaviorist principles, such as learning through reinforcement and conditioning, but extend beyond them by highlighting human reasoning and planning. Unlike traditional behaviorist views, social cognitive theory focuses on how individuals reflect on their past experiences and plan for future outcomes by considering...
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Criticisms of the Evolutionary Perspective01:23

Criticisms of the Evolutionary Perspective

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In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
Evolutionary psychology provides one explanation for these findings, suggesting...
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The Behavioral Perspective on Personality01:19

The Behavioral Perspective on Personality

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Behaviorists view personality as primarily shaped by environmental reinforcements and consequences. According to this perspective, behavior is influenced by external stimuli, and individuals adjust their actions based on rewards and punishments. Over time, learning histories — accumulated patterns of reinforcement — play a significant role in shaping personality. Behaviors that lead to positive outcomes are reinforced, while those resulting in negative outcomes are diminished.
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Cluster Sampling Method01:20

Cluster Sampling Method

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Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
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Vesicular Tubular Clusters01:45

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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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Perspectives on Neuroscience
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关于雷曼集群的斯基米奥尼克拓学的视角.

Pawel Pieranski1, Ivan Smalyukh2,3, Mehdi Zeghal1

  • 1Laboratoire de Physique des Solides, Université Paris-Saclay, 91405 Orsay, France. pawel.pieranski@universite-paris-saclay.fr.

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胆固醇液晶中的碰撞失位可以形成稳定的雷曼集群,而不是消灭. 这种免疫源于导体场逃入第三维,形成了拓的 skyrmion 管.

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科学领域:

  • 液晶物理学 液晶物理学
  • 凝聚物质物理学 凝聚物质物理学
  • 失调理论的错位理论.

背景情况:

  • 固体晶体中的失位通常在碰撞时被消灭.
  • 胆固醇液晶由于其螺旋结构而表现出独特的特性.

研究的目的:

  • 研究胆固醇液晶中的碰撞失位的行为.
  • 解释脱位免疫和雷曼集群形成的现象.

主要方法:

  • 在胆固醇介质中的脱位相互作用的理论分析.
  • 对导体场和缺陷结构的拓分析.

主要成果:

  • 确定了与伯格斯向量 b = p 和 b = - p 的位移避免灭绝的条件.
  • 证明莱曼星团是稳定的双胞胎类对.
  • 通过导体场逃到第三维的解释免疫力.
  • 列曼星团的特征是具有单极极端的 skyrmion 管.

结论:

  • 莱曼集群代表了胆固醇液晶中的一种新型稳定的拓缺陷.
  • 导演场的三维逃逸对于缺陷稳定性至关重要.
  • 诸如 skyrmions 和 monopoles 这样的拓概念为理解这些结构提供了一个框架.