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isaac Mao

Neuron - Wikipedia, the free encyclopedia - 1 views

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  • Neurons exist in a number of different shapes and sizes and can be classified by their morphology and function. The anatomist Camillo Golgi grouped neurons into two types; type I with long axons used to move signals over long distances and type II without axons. type I cells can be further divided by where the cell body or soma is located. The basic morphology of type I neurons, represented by spinal motor neurons, consists of a cell body called the soma and a long thin axon which is covered by the myelin sheath. Around the cell body is a branching dendritic tree that receives signals from other neurons. The end of the axon has branching terminals (axon terminal) that release transmitter substances into a gap called the synaptic cleft between the terminals and the dendrites of the next neuron.
isaac Mao

Science Friday Archives: Do You Want to Believe? - 0 views

  • People who had written about a situation in which they were not in control were more likely to draw non-existent connections between the coincidences, the researchers found.
isaac Mao

How Cancer Grows and Spreads - Featured Research - Research - Children's Hospital Boston - 0 views

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    这就是中国欠缺的内容
isaac Mao

Scientists adapt economics theory to trace brain's information flow - 0 views

  • Granger's original objective was to see if links could be established that allowed economists to use current economic data to forecast changes in the economy in the near future. But first author Steven L. Bressler, Ph.D., professor of psychology at Florida Atlantic University, suspected the technique might help reveal if one brain area was passing data to or influencing another brain area.
leo bnu

一位世界级专家的学习研究关注(二) at 益学会 > 教育中文翻译 - 0 views

  • 如果我们能够理解人类的思维是如何学习的,我们就能够理解如何管理我们的学习资源网络。
  • 社会性网络理论时代,这是Duncan J. Watts等人开创的领域
  • 学习网络这个项目在理论上、以及超越理论的目的,就是要建立或帮助人们建立各种工具,当它们被大量使用时,将会产生出一个自我组织的网络来。
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  • 想象一下一个这样的文字处理软件,它会在你输入论文时,向你建议你在那时可能想阅读和使用的参考资料。它工作良好,不会有偏见,也没有背后的商业动机。想象这样一个网络:在你创建出自己的学习资源后,如果打算将其放到开放市场上去销售,它能够立刻准确地告诉你,你的资源价值几何。
isaac Mao

Welcome to SIF - 0 views

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    for Wego reference
leo bnu

一位世界级专家的学习研究关注(一) at 益学会 > 教育中文翻译 - 0 views

  • 语义网(Semantic Web)是其中之一,它最重要的洞见,是学习资源可标准化描述。
  • 一张图片到底是科学的还是色情的,由解读来决定,并不由物质载体本身。
  • 推荐系统包含三种类型的数据:资源的描述、个人的描述,具体的评估或排序的信息。
isaac Mao

Your Child's Growing Brain | ParentCenter - 0 views

  • Most of the brain's wiring is established during the first few years of life. At birth it was only about a quarter of its eventual adult size. But by age 2, it has reached three-fourths of adult size! And by 5, the brain will be very close to adult size and volume.
  • Surprisingly, the brain of a 2-year-old has trillions of connections — double the number that an adult has! The brain grows connections in response to all kinds of input in order to adapt and survive. Over time, certain connections are used again and again while others fall by the wayside
isaac Mao

Study provides new insights about brain organization - 0 views

  • "One theory is that individual senses have separate areas of the brain dedicated to them," said Mark Wallace, Ph.D., the study's lead investigator. "In this view, information is processed initially on a sense-by-sense basis and doesn't come together until much later. However, this view has recently been challenged by studies showing that processing in the visual area of the brain, for example, can be influenced by hearing and touch."
isaac Mao

The Loom: West Coast Soul, or How to Get on TV - 0 views

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    new book
isaac Mao

Forming Social Memories - 7 views

  • such as the amygdala, which is specialized in the memory of emotions.
isaac Mao

Every drink shrinks the brain, warns new research | theage.com.au - 2 views

  • The American research, which looked at brain scans of more than 1800 people, comes after Australia's National Health and Medical Research Council released draft guidelines warning that more than two drinks a day posed a health risk.
  • Their MRI scans revealed brain volume of moderate drinkers was almost 1% smaller than teetotallers while those who had 14 or more drinks a week suffered 1.2% shrinkage.
isaac Mao

untitled - 0 views

  • For middle-aged and older adults, searching the Internet could be a boost to the brain, a new study suggests.
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  • The researchers used functional magnetic resonance imaging scans to record subtle brain-circuitry changes in the patients as they performed Web searches and read book passages. fMRI scans track the intensity of cell responses in the brain by measuring the level of blood flow through the brain
  • But Internet searches revealed differences between the two groups. While all the participants showed the same activity as during the book-reading, the Web-savvy group also registered activity in the frontal, temporal and cingulate areas of the brain, whereas those new to the net did not. (These areas of the brain control decision-making and complex reasoning.)
  • Compared with reading, the wealth of choices on the Internet requires that people make decisions about what to click on, which engages important cognitive circuits in the brain
isaac Mao

Golden Swamp » Standards and synapses are very different - 0 views

  • I put the Illinois Learning Standards and the Synapse side-by-side to suggest that we require students to learn subjects inside of little boxes, while students think about them in highly connected networks. The boxes in the Standards are separated from each other in all sorts of ways: living things are in different boxes than processes of the Earth. Different things about the same subject are spread out over five different grade levels. There seems little chance of having a thought that relates an early box in “A” to a late box in “E.”
isaac Mao

How Multitasking Affects Human Learning : NPR - 0 views

  • Multitasking is part of daily life. But humans remember and learn differently when their attention is divided. Russel Poldrack, a UCLA psychology professor, speaks with Lynn Neary about what occurs in the brain during multitasking.
isaac Mao

Not Exactly Rocket Science : Taking the new out of neurons - 0 views

  • The situation is much the same in primates and rodents, where new neurons only appear in the hippocampus and olfactory bulb. In contrast, fish, reptiles and birds renew the neurons throughout their entire network and throughout their entire lives.
isaac Mao

专业余时代 - a knol by Isaac Mao - 0 views

shared by isaac Mao on 14 Aug 08 - Cached
  • 我们正在进入一个专业余(Pro-Am)时代,每个人都因为技术和工具的增强而提升了多领域的参与能力,并且能够逼近专业水平。从社会范畴来看,业余参与者和专业人士之间的边界变得越来越模糊,这种变迁将导致很多社会结构的变化。例如,无数看似业余的创作,可以透过连接形成美妙的作品,以及更多的可能性。
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