Posts by Samuel
Posts by Samuel |
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1)
Message boards :
SETI@home Science :
Biological SETI - We're looking the wrong way
(Message 1357705)
Posted 32 days ago by  Samuel
What about mutation rates? They are pretty high in unused parts of den DNA. And so I think It would be nearly impossible do decode the orignale message |
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2)
Message boards :
SETI@home Science :
So many planets and no way to get there. What a bummer!
(Message 1333911)
Posted 106 days ago by Samuel
It doesnt matter ,if you run marathon in space and reap little on bone loss. squids would be nice astronauts.. :-) |
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3)
Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1329494)
Posted 119 days ago by Samuel
the nanoparticles found in ALH are simply to small. length: 380nm wide range about 20nm.(Scientific american) ( 20-100 nanometres in diameter, wiki) the diameter of a ribosome is about 20-25nm. in an E.Coli you can find about 20 000 ribosomes. the smallest living beeing (Mycoplasma) has a diamter about 200nm. Staphylococcous aureus: 600nm.... the ALH84001 particles are to small to produce Proteins, no space for a metabolism etc. The famous nanobacteria (for example Nanobacterium sanguineum)seems to be only anamorphic hydroxylapatite crystals (Ca2+ + PO42-) with proteins, lipids, DNA, RNA.. (sientific american) you may like: http://journalofcosmology.com/Panspermia1.html |
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4)
Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1329402)
Posted 119 days ago by Samuel
Remember ALH 84001... Nanobacteria from mars, a great failure Today, rock 84001 speaks to us across all those billions of years and millions of miles. It speaks of the possibility of life. |
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5)
Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1328544)
Posted 121 days ago by Samuel
Bilateral symmetry seems to be one of those features that occur again and again in very many, and very different forms of life. Yes nearly every high developed has a bilateral Symmetry - the Bilateria. I just wanted to say that there are two crown-groups of Diatomeens- the Order Centrales engl. Centric(radial) and the Order Pennales engl. Pennate (bilateral)(old system). .... examined before we can say with certainty whether this is an Earthly organism, or one that merely has some points of resemblance to same. this discovery need to be checked, true. But you have to be very careful and critical about this topic. It states that among competing hypotheses, the one that makes the fewest assumptions should be selected. Occam's razor |
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6)
Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1328340)
Posted 122 days ago by Samuel
yes convergent evolution is common in nature. Same solutions for the same problems. but its nearly impossible that life on other planets "choose" the same way of evolution. Diatomeen are well studied. their ecology etc and also their evolution, because they store silic acid (SiO2 · n H2O) in their cell wall. And so you can find them often well preserved. I know not much about them but when you take a look a the picture you can specify the Order. I looks like O. Pennales because of their bilateral symmetry. O. Pennales (Eunotiales, Diatomales, Achnanthes or Naviculales), its hard to specify exactly, because you only see one side of this organism. Does anybody know better? some botany experts? :-) |
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7)
Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1328287)
Posted 122 days ago by Samuel
These diatoms have definitely an terrestrial origin. Diatoms appeared hundred billions of years after the "genesis". The oxygenic photosynthesis they use have been invented by Cyanobacteria. Diatomeen also have an secondary endosymbiosis (with am eucaryotic algae). They also an N2-fixing endosymbiosis (with Cyanobacteria). This is the result of a long long evolution on earth. ------------- I think panspermia is a nice idea. But i think that the originate of life happened on earth. meteorites may be important for accumulation organic matter. |
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8)
Message boards :
SETI@home Science :
Astropulse result
(Message 1317030)
Posted 151 days ago by Samuel
Hello, sorry i don't know where to post my question. and so i decided to make a new thread :-) Sorry about that. What does that mean? ap_12no12aa_B4_P1_00052_20121218_25767.wu_0 RFI? or simply a compute error? Found 30 single pulses and 30 repeating pulses, exiting. percent blanked: 0.00 http://setiathome.berkeley.edu/result.php?resultid=2758438248 |
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9)
Message boards :
SETI@home Science :
HD 40307g
(Message 1303509)
Posted 192 days ago by Samuel
new discovery: HD 40307g http://phl.upr.edu/press-releases/firstpotentialhabitableexoplanetinasix-planetstarsystem http://phl.upr.edu/projects/habitable-exoplanets-catalog |
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10)
Message boards :
SETI@home Science :
Search humanoids based on silicon.
(Message 1303122)
Posted 193 days ago by Samuel
a funny thing: a silicon-based organismen maybe would exhale fire and SiO2 on a planet with O2 in the atmosphere. They may produce Silane (SiH4)as end product of their metabolism. SiH4 + 2O2 ---> SiO2 + 2H2O +ΔT ------------- Note. a anaerobic metabolism wouldn't create enough energy for intellingent lifeforms. So these fire-spitting aliens are just fiction. |
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11)
Message boards :
News :
New AstroPulse applications for GPUs.
(Message 1300710)
Posted 200 days ago by Samuel
Why i don't get any astropulse- tasks (ati_gpu)? since 2 months or so, my computer doesn't get any astropulse tasks.. Out of work? |
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12)
Message boards :
SETI@home Science :
black holes - white holes - worm holes
(Message 1262500)
Posted 303 days ago by Samuel
that would make sense... but i never heard that white holes really exist. they would be very easy to detect- because they would emit matter. and nobody had ever seen such a phenomen. |
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13)
Message boards :
SETI@home Science :
Search humanoids based on silicon.
(Message 1261743)
Posted 305 days ago by Samuel
Hello Pop Horea-Vasile, why carbon? - we only know life-forms based on carbon - carbon can create single-, double-,triple-bonds. (even with other carbon atoms) - there can be hydrophilic and hydrophobic regions (- amphiphilic molecules- these molecules are very important for life in liquid solutin (h2o)- biomembrane- lipid-bilayer) - alkanes, alkene, alkyne... long chains - carbon compounds can create cycles, even heterocycles (with N eg.-> DNA, RNA, important for carrying the genetic information. maybe this information can be also saved on an aperiodic crystal..) |
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14)
Message boards :
SETI@home Science :
The subject of UFOs
(Message 1261736)
Posted 305 days ago by Samuel
maybe my statement has nothing to do with the actuall discussion now in this thread... in context to 'the subject of UFOs' i only can say that UFOs are mostly frauds, airplanes, strange meteorological phenomena, e.g. :-) no visitors from outer space.... and no strange subjects like in "the X-files" |
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15)
Message boards :
SETI@home Science :
Boinc run settings
(Message 1185208)
Posted 491 days ago by Samuel
i use all my cores 100%, even when i use the computer.. i think that isn't a problem because (on my computer) the seti- tasks run under a low priority. maybe you have to controll the cpu- core temperature. sometimes when i run a programm wich uses more cpu- performance i set back to 70%- 50%. |
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16)
Message boards :
SETI@home Science :
Large moons unnecessary for stable planet ecospheres?
(Message 1175828)
Posted 531 days ago by Samuel
i think so too. that's a very interessting topic. |
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17)
Message boards :
SETI@home Science :
Large moons unnecessary for stable planet ecospheres?
(Message 1175681)
Posted 532 days ago by Samuel
that's true. Everthing we see now is the result of an 3,8 billion year old coevolution and symbiotic interactions between the organisms on earth. the plant fixate the CO2 by creating carbohydrates and create energy via the light reactions (therefor they use H20 and create O2). heterotropic orangisms like us burn the carbohydrates by using O2 and creating CO2 and H2O.- the cycle is closed. A very efficient system. But maybe life on other planets use different biochemical ways. |
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18)
Message boards :
SETI@home Science :
Large moons unnecessary for stable planet ecospheres?
(Message 1175663)
Posted 532 days ago by Samuel
Live on earth started without O2... At this time O2 was very toxic for all lifeforms. the first cyanobacteria used H2S as e- Donator. But 3- 2,8 billion years ago- most of the H2S was depleted. So the cyanobacteria used H2O as e- Donator, and this form of photosynthesis created O2. a mass extinction followed. later the organisms learned to detoxify O2 (mitochondria) and use O2 for their own metabolism. the big advantage: - greater energy efficiency (metabolism creates much more energy (ATP) by using O2 than under anaerobic conditions) - ozone (O3) which protects from UV- radiation But is O2 really necessary for the evolution of high developed organisms? |
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19)
Message boards :
SETI@home Science :
The Voyagers
(Message 1165462)
Posted 571 days ago by Samuel
The voyager record will be unreadable when it takes a damages of 10 percent. They calculated 2 percent damage for the first lightyear. After the first lightyear, the record only takes a damage of 0,02 percent every 50ly. So when the voyager reaches a distance of 5000ly. There will be a damage of 2percent (plus the first 2%)= 4% But this calculation refers only to the outside of the record. the inside of the record is better protected. the roughly estimated lifspam is nearyl 1 billion years. And the informations are stored on this side. |
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20)
Message boards :
SETI@home Science :
The Voyagers
(Message 1165266)
Posted 572 days ago by Samuel
The voayger record maybe has a lifspam of one billion years... And in nearly 100 Million years the voyager will reach a distance of 5000 lj. (Sagan, Drake Murmurs of Earth 1980) 
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