Does an electrolyte behave like a resistor essay

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Does an electrolyte behave like a resistor essay

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Ramachandran known to friends and colleagues as "Rama" delivered the inaugural "Decade of the Brain" lecture at the Silver Jubilee meeting of the Society for Neuroscience, this country's leading organization for brain research.

His talk, laced with wit and humor, received a standing ovation. He is in great demand as a speaker, both for scientific and lay audiences.

Does an electrolyte behave like a resistor essay

Rama is on the editorial boards of several international journals and has published over scientific papers, including three invited review articles for Scientific American.

He edited a four volume Encyclopedia of Human Behavior that was cited by Library Journal as "the most outstanding reference for in the behavioral sciences.

Originally trained as a physician at Stanley Medical College, where he was awarded gold medals in pathology and clinical medicine,Ramachandran went on to earn a PhD in neurology from Trinity College at Cambridge University.

In he received a Gold medal from the Australian national university and in "99 the Ariens Kappers Medal by the Royal Netherlands Academy of Sciences for landmark achievements in neurosciences.

In the same year he was elected a fellow of All Souls College Oxford. Today he works exclusively with human neurological patients and one of his main interests is in the neurological basis of art.

He has been lecturing widely on this subject not only to scientists, but to art galleries and museums. He is also a physician. A dynamic speaker who rolls his r's and flourishes vowels, Dr. Ramachandran gives scientific talks the world over. I predict that mirror neurons will do for psychology what DNA did for biology: There are many puzzling questions about the evolution of the human mind and brain: Yet many of the attributes we regard as uniquely human appeared only much later.

What was the brain doing during the long "incubation "period? Why did it have all this latent potential for tool use, fire, art music and perhaps even language- that blossomed only considerably later?

How did these latent abilities emerge, given that natural selection can only select expressed abilities, not latent ones? I shall call this "Wallace's problem", after the Victorian naturalist Alfred Russell Wallace who first proposed it.

After another million years of evolutionary stasis aesthetically pleasing "symmetrical" tools began to appear associated with a standardization of production technique and artifact form.

These required switching from a hard hammer to a soft wooden? And lastly, the invention of stereotyped "assembly line" tools sophisticated symmetrical bifacial tools that were hafted to a handle, took place onlyyears ago.

Why was the evolution of the human mind "punctuated" by these relatively sudden upheavals of technological change? Or did it evolve from a more primitive gestural language that was already in place? Why are apes and humans so good at reading other individuals' intentions?

Do higher primates have a specialized brain center or module for generating a "theory of other minds" as proposed by Nick Humphrey and Simon Baron-Cohen? If so, where is this circuit and how and when did it evolve? The solution to many of these riddles comes from an unlikely source.

I suggest that the questions become less puzzling when you consider Giaccamo Rizzollati's recent discovery of "mirror neurons' in the ventral premotor area of monkeys.

This cluster of neurons, I argue, holds the key to understanding many enigmatic aspects of human evolution. Rizzollati and Arbib have already pointed out the relevance of their discovery to language evolution.

But I believe the significance of their findings for understanding other equally important aspects of human evolution has been largely overlooked. This, in my view, is the most important unreported "story" in the last decade. But the question of how such an extraordinary ability might have actually evolved has puzzled biologists, psychologists and philosophers at least since the time of Charles Darwin.

The problem is that the human vocal apparatus is vastly more sophisticated than that of any ape but without the correspondingly sophisticated language areas in the brain the vocal equipment alone would be useless. So how did these two mechanisms with so many sophisticated interlocking parts evolve in tandem?

Following Darwin's lead I suggest that our vocal equipment and our remarkable ability to modulate voice evolved mainly for producing emotional calls and musical sounds during courtship "croonin a toon.

But a bigger puzzle remains. Is language mediated by a sophisticated and highly specialized "language organ" that is unique to humans and emerged completely out of the blue as suggested by Chomsky?

Or was there a more primitive gestural communication system already in place that provided a scaffolding for the emergence of vocal language? Rizzolatti's discovery can help us solve this age-old puzzle. He recorded from the ventral premotor area of the frontal lobes of monkeys and found that certain cells will fire when a monkey performs a single, highly specific action with its hand: One might be tempted to think that these are motor "command" neurons, making muscles do certain things; however, the astonishing truth is that any given mirror neuron will also fire when the monkey in question observes another monkey or even the experimenter performing the same action, e.Like an arc, it has a beginning, a bow, and a tip.

NOTES: 07/01/ - 08/01/

The beginning of this arc is the invention of lithography in , the bowof the arc is the invention of photolithography in , and the tip of the arc coincides with the develop- ment of semiconductor lithography in the s and culminates in the state.

The variable resistor: Even with the use of a variable resistor the current constantly fluctuated. Not being able to keep the current constant can affect the rate of the reactions.

Therefore a more accurate resistor could have been used; however this was not available at the time of the experiment. Here is the “serial-rf12demo” module which does the rest of the magic: like to use a slow ramp as sort of a controllable power supply for JeeNodes and the AA Power Board to find out how they behave with varying input voltages.

Actually, I cheated a bit.

Does an electrolyte behave like a resistor essay

The real two-transistor current source circuit looks like this: By moving that. Sep 09,  · A capacitor resistor coupled multistage amp lets a) AC and DC pass to the next stage b)AC pass only acts like a switch 5.

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The common collector amplifier is sometimes called the emitter Materials that behave as insulents at very low temperature, and conductors at . Easy Lemon Cream.

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