Serenading mice can sing along if you hum a few bars - Register [fornadablog.blogspot.com]
Karanveer pays his gratitude to Mark while he provides training to Sia. However, he is annoyed with Sia's negligence and disapproves of her. Nevertheless, Mark and Kabir motivate Sia. Vishal tries to upload Pooja's obscene picture on internet, but Kabir stops him from doing so. Pooja reveals to Kabir that Vishal had pushed Sia on the water slide and thanks him for rescuing her. Karanveer apologises to Miss Sen for his behaviour. Miss Sen encourages Sia for the Delhi championship. [V] Humse Hai Liife - 9th August 2012
[fornadablog.blogspot.com], Serenading mice can sing along if you hum a few bars - Register
Neuroboffins are claiming that mice can not only sing, serenading at ultrasonic melodies high above soprano, but they can also change their tune.
The study has found certain brain features, associated with human and song-learning birds' brains, that show they may be able to learn new songs from each other.
Scientists have been assuming for the last 60 years that mice don't have any vocal learning traits at all, but Duke uni neurobiologist Erich Jarvis, who ran the study, disagrees.
The boffins put two male mice in a cage with one female to serenade. They tested more than 14 mice and repeated the experiment twice to be sure, but found that the two murines' song converged after seven to eight weeks.
However, the mice may only be singing at the same pitch, a convergence that has been seen in non-vocal learners. It implies that the mice don't actually "learn" to sing at the same pitch.
To learn instead of converge, there are five features associated with brain structure and behaviour that boffins look for. The study used gene expression markers to light up neurones in the motor cortex of the mixes' brains as they sang. It also used an injectable tracer, which mapped the signals from the neurones to the larynx.
The boffins knocked out the song-specific neurones in mice as well by damaging them. Mice with the damaged neurones or deaf mice couldn't keep their songs on pitch or repeat them as consistently.
"Our results show that mice have the five features scientists associate with vocal learning. In mice, they don't exist at the advanced levels found in humans and song-learning birds, but they also are not completely absent as commonly assumed," Jarvis said.
To back up their findings, the researchers are now searching for genes specific to the brain circuits for vocal behaviour, which have so far only been found in songbirds and humans.
The study was published in PLOS One. ®
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Question by Larry: How can I determine source of "water" in furnace? I am getting water in my carrier 58pav 80% efficiency furnace through the exhaust vent. Both the inside of the vent and the furnace are corroding. I understand that it is likely either rain getting into the vent, or is due to condensation forming in the chiminey pipe (Most likely because chimney pipe is too large). How can I test and determine which is occuring??? Best answer for How can I determine source of "water" in furnace?:
Answer by wallmeis Answer by marko
The easiest way would be to put an additional cover over the exhaust top to prevent rain from coming in and see if the water ceases. Perhaps make it out of coffee cans and baling wire just to last a week or two. It occurs to me that you have no idea when water is present, just that it is a chief suspect for the corrosion. For that, you'll have to inspect the pipe interior several times: when dry (not raining and the system hasn't run for a day or more), after/during rain, and after the system has run for awhile. The inspection could be done with a wadded paper towel on a long stick from the roof. Or, if you're adventurous, by disassembling the furnace connection.
You could put a roof cap on the chimney vent. That would eliminate the rain as a cause and would leave the condensation to deal with. The run of the vent should be made of Type B double wall construction. It should have as few elbows as possible and be of the correct diameter, like you mention. Probably 3 inches. A contractor would have to determine that. I am only a tech. There should be about 2000 ft3/hr of excess air for your size furnace so I would be sure that the draft hood is clear allowing positive pressure all the way outdoors.
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