Talking about science is a good way to gather peoples of different minds to build a nice world. Here we can share scientific lessons, facts and news from different fields such as math, physics, engineering, medicine and so on...
We know very little, and yet it is astonishing that we know so much, and still more astonishing that so little knowledge can give us so much power. Bertrand Russell
HELLO MY FRIENDS :
please enrich the group by your scientific discussions and include source of the material you present in order to let others rely on what you say and also let them know about sources in which they can find more info....
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The body is the hero
Hello guys, I was chatting earlier today and someone told me that science must be considered the hero of our time mainly when it comes to our immune system. Thenceforth, I decided to post exactly what I have learned from the past few days and I hope this will help you to understand more about our body . With a circulatory system such as we have, we cartainly need protection. And it is there, a group of chemical protectors and microbial killers so quick and so powerful that, in spite of our…
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Comments
hmm... I am also so sorry for its inactiveness, dear Ricardo ....
So far I couldn't manage my time to add more discussions here ...Any suggestions ?
I don't know why this group is inactive if science is very interesting.
I hope all member are okey
please test this formula
this number * your age * this number and you see wonderful result
13837*your age*73=wonderful result
:)
OK...I try to take a look in Google to see what I can bring here ...
Hope to see members active ...At least share some links to your favorite science-related articles ...It is not that tough ,is it ?
:)
most welcome here...
to me science is not restricted to just physics ,math and so on...i think all the world is a blackboard on which different systematic knowledge is presented and everyone can enjoy learning ...
i love literature a lot ...i think literature is a way of trimming the knowledge human gains ...we can help others enjoy learning different materials, no matter it is math or linguistics , by presenting the stuff in a nice structure which can be invented in your field of study ...
literature is a science itself;it impesses one's soul and brings about joy and calmness;peace of mind is caused when facing with a well-organized story,poem and so on...it is the science of teaching the mind to think beautifully ...
reading science through literature can soften one's soul and causes the material studied to stick to the mind more easily ...
thanks a lot for joining us...
have a wonderful time:)
thanks a lot for joining us here ...most welcome...
i wish that you find the info shared here useful ...also we will be glad if you start your own discussions ...
have a nice time:)
most welcome here....
we are so glad to have a scientist here...i am so interested in chemistry as other fields of science...we will be glad if you inform us about news of chemistry...
thanks for joining and have a nice time :)
As a Chemist I'd like share my ideas,
Thanks and good luck.
Amila
Satellite monitoring of the artificial night sky brightness and the stellar visibility
The interest for the protection of the night sky from light pollution is growing every day. A global scale periodic monitoring of the situation is necessary.
Nighttime images of the Earth at night have been obtained from the Defense Metereological Satellite Program (DMSP) of the US Air Force since early '70. The first global image was obtained by Woodruff Sullivan in late '80.
These images only showed the geographic distribution of the sources on the Earth surface because the satellite detectors were saturated by the strong flux emitted by them and no quantitative measurements were possible.
Since 1998 unsaturated data become available, allowing quantitative measurements of the upward light flux emitted by sources.
However satellite data don’t give any direct information on the effects of this light flux on the night sky due to light pollution propagation. The aim of our work is to study these effects.
We measure the upward light flux of sources on the Earth surface based on DMSP satellite data and then we compute the effects on the night sky modelling the light propagation in the atmosphere.
Depending on the kind of map, we account for many details like the scattering of light by molecules and aerosols, the extinction along light paths, the atmospheric aerosol content, the Earth curvature, the altitude of each area, the mountain screening, the observed sky direction, the natural sky brightness, the stellar extinction, the eye capability.
In this site you can find information on our work, maps, scientific publications.
http://www.lightpollution.it/dmsp/-
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