Learning

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。

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

Watching black and white television as a child may explain why older people are less likely to dream in colour than younger people, according to new study reported in New Scientist.

And it was really fun and tough to try to boil down what I think and believe about school reform to a five minute speech to non-educators. And it's a good thing I talk fast. Enjoy.

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.

Some specific types of sensory stimuli and activities, especially those that involve non-routine actions and thoughts, produce more of those chemicals that encourage growth of new dendrites and neurons in the brain. These are generally non-routine activities. Routines become so automatic that actions are done largely unconsciously (ever get up in the morning and walk to the bathroom before you're really conscious?). Such automated or unconscious actions require less activity in the brain, and exercise it less.

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.

Sampling the brain: A device by the Mayo Clinic can analyze and detect neurotransmitters locally in the brain. Blue wires link an external monitor (circuit board) to gray connectors, which are in turn linked to neurotransmitter-sensing electrodes (not shown). The device is battery operated (the battery is shown connected to the circuit board) and can transmit the neurochemical information from the electrodes to a remote station for analysis.

What's really going on inside your head when you make a decision, make a mistake, or have a few drinks? In this segment, Ira and guests talk about new research involving the field of functional magnetic resonance imaging, or fMRI. The technique allows researchers to monitor the blood flow through parts of the brain as it responds to stimuli, allowing researchers to monitor which parts of the brain are active and which are resting. Though the technique is being eagerly explored in a variety of fields, fMRI has received criticism from some brain experts as being the modern-day equivalent of phrenology. We'll hear about the technique, and what it can tell researchers about the inner workings of the human brain.

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.

他（蔡）说，首先中国的政策始终是鼓励和帮助互联网的发展，而不是压抑互联网的发展。其次他说各个国家都有按照本国历史、国情、民俗制定的管理互联网的法律，中国也一样。他举例说比如在伊斯兰国家不准亵渎真主，或者在德国不准宣传纳粹。吉米回答说，他觉得维基百科的中立性非常适合这个规则。因为我们是写百科全书的，我们写世界上有什么，我们陈述各种观点，但是我们不是做宣传的或者传教的。我们在非伊斯兰国家里也不亵渎真主，在德国外也不宣传纳粹。----  [维基百科：互助客栈]