Author: Miguel A. Ballicora
Date: 14:04:25 10/03/01
Go up one level in this thread
On October 03, 2001 at 11:44:30, Robert Hyatt wrote: >On October 03, 2001 at 10:51:13, Miguel A. Ballicora wrote: > >> >>There is between two separate searches through the hashtable, killers etc. >>That is how "synergy" lowers the time in iterative deepening. >> > > >Ok.. You do a 5 ply iteration on one processor, and a 6 ply iteration on the >other, in parallel, and show me the "synergy". Notice that your example is >_exactly_ my point. "SERIAL". The 5 ply search _must_ be done first. It >then orders the 6 ply search more efficiently. If you do them in parallel, >you don't get this synergy. > >And actually, "synergy" is the wrong term here, because iterative deepening >is _also_ a purely sequential algorithm. So? synergy applies to things that are sequential too. >>Yes, really. On other planets too. I am not going to discuss more on this >>example because we are wasting time, yours and mine. It supposed to illustrate >>an aspect of synergistic effects and nothing more. There many examples of this >>in science. I understand you might not believe what I tell you, so please >>believe any textbook that deals with friction and mechanics. Those are typical >>examples. > >I have one right here. Which part would you like to discuss here? It is >_always_ easier to drag than to lift and carry. Perhaps in "dragging" you have Well, it is not _always_ easier and explained why already. If you want to find it in a book it may be in the exercises of the chapter that deals with static and dynamic friction coefficient. Anyway, this example was colateral. >to provide a lifting force to overcome part of the friction. > >> >>Faster solution does not involve expending more energy. Do not confuse >>kinetics and thermodynamics. In fact, life is finding faster ways >>to do things that might not look the most favorable (energetically). >> > >That is _my_ point. But in your example, it _does_ involve expending >more energy. One man can drag 10 200lb blocks N feet in M units of >time. Two men can do that in M/2 units of time. If both drag a block >together, they will expend more energy than if each drags one. Because >the acceleration is not free and they have to move _twice_ as fast. And >that means more "work" is being done. A computer can't do "more work". >So the example simply doesn't apply. > > >>You did not like Bruce's example? This one does not involve scientific >>knowledge: >>Team A: One person , 1 cart, 100 boxes too heavy to lift by only one person. >>Team B: Two persons, 1 cart, same 100 boxes. >>Task = move them 100 yards. >> >>Team B will take <50% of the time that it will take for Team A. Lifting >>once onto a cart is easier than pushing. > >I use an inclined plane to slide the boxes onto the cart. Remember, if you You do not have an inclined plane, that was not part of the example. If you change the rules of this simple example we can be discussing for ever going for branches of the "analogy tree". I knew this is what could happen. We end up discussing things that are irrelevant. Miguel
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