battle of night & day

The light reaches in
Spreading through the room
Sending the dark
Fleeing for cover
The dark cowers there
Before the light's brightness
But the light can't win
The night will come
The light will retreat
And the dark recover
This battle
Of night and day
Of dark and light
Will not end!

Is Our Brain uses Statistical Methods for solving Complex tasks?

Humans do the tasks such as image analysis, speech processing, decision making in a real time situation ( for example driving in a congested road ) are very efficiently. Especially our modern computers can't do in a linear way because we can't generalize these tasks with the help of designing an algorithm.

Aided by developments in statistics and artificial intelligence, researchers have begun to apply the concepts of probability theory rigorously to
problems in biological perception and action. One striking observation from this work is that human observers behave as optimal Bayesian observers.This leads naturally to the idea that perception is a process of unconscious, probabilistic inference.

To use sensory information efficiently to make judgments and guide action in the world, the brain must represent and use information about uncertainty in its computations for perception and action.

The fundamental concept behind the Bayesian approach is that the information provided by a set of sensory data about the world is represented by a conditional probability density function over the set of unknown variables. We needs to sharpen the statistical concepts studied in our school days. he he.

Chaos & 21st century

The 21st century is the century of chaos. One of the greatest physicists of our time, Stephen Hawking noted in the year 2000,

‘I think the next century will be the century of complexity’

. Chaos consists of sequences singled out from a chaotic complex system. The difficulty however is that the ever changing nature of chaos is non-repeatable, which makes it difficult to follow the trajectory of its motion into the future.
Now if you were a natural scientist you would come up with equations and note down the constant changes in a given system and try to find a discernible pattern in the system. To give an example, that is how the weather forecasters approach the changes in the weather. Economists too, in their own right, deal with chaotic systems and make their best guess of the future state of an economic system, say, the stock market.

Brain Chemistry

A chemical called "dopamine" is broadly spread through the brain by specialized nerve cells, when a person achieves some kind of reward. Its chemical actions are produced also by closely related compounds such as amphetamine and cocaine. They give feelings of optimism, energy, power, and knowledge.

another chemical called "serotonin" is important in bringing mental relaxation as an important condition for getting to sleep. We don't really know yet what sleep is for, but we know that we can't survive without it.

Scientists have learned that, when animals mate and give birth, specialized chemicals are released into their brains that enable their behavior to change. Maternal and paternal patterns of nursing and caring appear. The most important is a chemical called "oxytocin". It doesn't cause joy. But it may cause anxiety, because it melts down the patterns of connections among neurons that hold experience, so that new experience can form. We become aware of this meltdown as a frightening loss of identity and self control, when we fall in love for the first time.

Freedom

"Those who profess to favor freedom, yet depreciate agitation, are men who want crops without plowing up the ground. They want rain without thunder and lightning. They want the ocean without the awful roar of its many waters. This struggle may be a moral one; or it may be a physical one; or it may be both moral and physical; but it must be a struggle. Power concedes nothing without a demand. It never did and it never will."
Frederick Douglass, American Abolitionist

its me, godwin