There was an argument about the ground wire used in electrophysiological recordings.
Of course, the surface area of the ground wire should be as large as possible, because 1) it will minimize the junctional resistance between the electrode and the saline, and 2) it will last longer.
The ground wire works as a current sink. It sucks up all current you apply through the microelectrodes, including those generated by zapping and by the capacitance compensation. A thicker wire should last longer . The ground becomes more stable with increased surface area because lower current density on surface would cause less voltage drop.
The AgC2 layer is very thin on the purchased silver pellets. It will go away soon after a heavy usage in current- and voltage-clamping. One has to chloride it frequently. However, if the AgCl2 layer became too thick, then it often often flakes off by a shock, or accidentally touching it with forceps. This is why I don't like those purchased pellets. Thier prices are ridiculous ly high. That's the other reason why I hate it.
Wednesday, September 17, 2008
Friday, September 12, 2008
Sarah Palin and Hillary Clinton
There are two kinds of people in this world.
One kind of people would try to see the truth. They can wipe off their expectation with what they saw, heard, found or learned. If I speak to these people, they would look at my eyes and listen to me and try to understand what I said.
The other kind of people look at what they expect. They don't try to learn but just categorize things into a few things that they already knew. If they face something or people that they cannot categorize, they just trash it. Their eyes are not seeing the world but looking at what they have in their mind.
If I spoke to these people, they would judge me by seeing how I look different and where I am from, before understanding what I said. They think they are smarter than I am even though the situation is quite opposite. They are proud of not understanding things and not knowing things. They are proud of their stupidity.
I think this kind of people start warfare.
Living in this country as an alien, I become very good at telling these two kinds of people by just seeing them, hearing them speak.
Hillary Clinton, she is very smart. I know she would listen to me if I talk to her.
Sarah Palin, she won't. I know that. I can tell.
One kind of people would try to see the truth. They can wipe off their expectation with what they saw, heard, found or learned. If I speak to these people, they would look at my eyes and listen to me and try to understand what I said.
The other kind of people look at what they expect. They don't try to learn but just categorize things into a few things that they already knew. If they face something or people that they cannot categorize, they just trash it. Their eyes are not seeing the world but looking at what they have in their mind.
If I spoke to these people, they would judge me by seeing how I look different and where I am from, before understanding what I said. They think they are smarter than I am even though the situation is quite opposite. They are proud of not understanding things and not knowing things. They are proud of their stupidity.
I think this kind of people start warfare.
Living in this country as an alien, I become very good at telling these two kinds of people by just seeing them, hearing them speak.
Hillary Clinton, she is very smart. I know she would listen to me if I talk to her.
Sarah Palin, she won't. I know that. I can tell.
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