Posts Tagged ‘science

Microsecunda la apa

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NASA. Ieri. Va spun pe scurt, in caz ca nu ati dat peste stire. In urma cutremurului din Chile de 8.8 de zilele trecute, o echipa de cercetatori de la NASA sustine ca axa pamantului s-ar fi deplasat cam cu 8 cm, ceea ce inseamna ca durata zilelor pe pamant s-ar fi scurtat cu 1.26 microsecunde. Si cutremurul din Sumatra din 2004, spune NASA, ar fi deplasat axa cu 7 cm si ar fi scurtat durata zilei cu 6.8 microsecunde.

Stim ca o secunda are un milion de microsecunde. Ce imi spune stirea asta si cum ma afecteaza ca durata zilei s-a(r fi) scurtat cu o durata pe care nici nu am perceput-o vreodata? Nici cat as clipi nu mi-a trecut prin minte gandul de a intra in vreo discutie filosofica despre timp, dar punand deoparte paradigma ori discursul umanitar pe care-l recitim saptamanal cu fiecare calamitate care se mai intampla, grijile pentru familiile prietenilor chilieni ori haitieni, ce impact are stirea asta sa-i zicem probabilistica? Ca sintem cu totii intr-o barca, nimic nou sub soare (oarecum). Doar un exemplu mai recent – “global warming”, credem sau nu, sintem verzi sau nu, ne aminteste de barca aproape in fiecare zi. Vrea stirea sa zica, iata un eveniment care dincolo de compasiunea pe care o avem pentru oamenii in cauza ne afecteaza pe toti si in fiecare zi de acum incolo – la nivel de microsecunde? Nu mi-e clar, dar microsecundele astea ma duc cu gandul la ceasuri, la cronometria vietii de zi cu zi si dependenta de sistemul solar. Secolul al XIII-lea – avem ceasul mecanic. In secolul al XVI-lea putem numara si minutele. In urmatorul secol, ajungem sa numaram si secundele si asa incet-incet, am ajuns sa traim mai disciplinat, mai rationalizat. Spunea Goethe la un moment dat ca “It is bad enough that now one can no longer learn anything for one’s whole life. Our ancestors stuck to the lessons they received in their youth; we, however, have to relearn things every five years if we do not want to fall out of fashion completely.” Cinci ani cred ca pot fi inlocuiti cu o alta cifra, mult mai modesta, in contextul nostru modern, cand forta tehnologiei ne obliga sa ne grabim cu experientele – nici nu le dosim bine, ca ne aruncam in altele, sa tinem pasul cu timpurile accelerate, cand am ajuns aproape sa numaram microsecunde.

Tastatura targului sau “I think, therefore I am; I speak, therefore I am; I write, therefore I am; I publish, therefore I am.” (Raymond Trousson)

Dupa bunul obicei de data recenta, drept e – si costisitor din punctul de vedere al miliardelor mele de microsecunde, ma intereseaza ce parere au si alti cetateni-scriitori din diferite colturi ale lumii. Si asa am cautat in mai multe locuri si-am urmarit ce inseamna stirea pentru unii si pentru altii. Nu lipsita de haz mi-a fost cautarea. Prin urmare, iata selectia raspunsurilor de pe cateva site-uri: CNN, (mentionat succint pentru dimensiunea apocaliptica), blog Le Monde (pe scurt, ca doar am vorbit despre francezi mai zilele trecute).

Don’t worry people, my ex wife is moving to Colorado, according to my calculations, this large displacement of mass, will gain us about 4 minutes of daylight per day.

Don’t worry folks, I moved a wheel barrow full of rock to the other side of my yard. That should just about get us back on track.

Talk about irrelevant information overload . . . „a millionth of a second” – my God don’t these ‘scientists’ have nothing more productive to do with their time and intelligence!?! . . . work on world hunger, work on peace, work on all the things wrong in this world. But for cryin’-out-loud, don’t fricken bother us with your trivial info. Get a REAL life.

An example of completely misleading science reporting. The continuous change in the length of the day is in response to tidal effects on the Earth. These are one thousand times larger in amplitude than earthquake effects. For instance, on Feb.2, 2010 the completed one spin on its axis 1,670 microseconds (plus or minus 6 microseconds) longer than it took On Jan. 13, 2010. And on Feb.10, 2010 it spun around 1,330 microseconds (plus or minus 6 microseconds) FASTER than it did eight days before. So, don’t sweat the earthquake effects, they are an infinitesimal distraction at best. Ditto the earthquake’s effect on the position of Earth’s pole in space.

Has Al Gore figured out how to make a buck off of this?

Been analyzing these comments all morning trying to determine which of these vacuous commentators is Sarah Palin. Too many close contenders to be certain.

Hope the ‘daylight savings time’ people don’t go crazy with this.

personally I wish they would quit messing with the time and just leave it one way or the other.

we can easily counter the lost time by encouraging everybody to eat fast food today in the united states. if people’s mass increases, a longer day will result. that way, no watch adjustment necessary

I sure hope that those responsible for the GPS satellites are aware of this and correct the time of day. Even a change in microseconds can result in GPS receivers calculating a location with a significant error.

This is really going to mess with the microsecond hand on my watch.

If all 1.3 billion people in China decided to jump at once would that have the same effect?

Now I have to go to bed earlier thanks earth.

definitely a big headline for a little story. Does make you consider the dynamics of the world though. I only ask that 1 billion people move to the equator mon-thurs to speed up my week and then go get drunk in canada to lengthen my weekend

A few microseconds could make a lot of difference especially for satellite based technologies. GPS, missile guiding systems, weather satellites, etc. would have to be adjusted. And just to put it in context: it is estimated (from satellites) that sea levels rise by 3.26mm per year. The Earth moving by 8cm on its axis (causing this 1.26 microseconds time change) is really HUGE compared to the sea level rise. We are in a world where every microsecond, every nanometer count. So this article is very much interesting.

This is extremely worrying. How can I set my watch accurately knowing that every minute all over the world, earthquakes are occurring and dams are being filled and emptied which cause the day to get longer or shorter all the time? Why has Google not yet released a watch that takes all this information into consideration and keeps your time accurate to the microsecond? I’m very disappointed with Google’s failure to do this.


Se cumplen las profecias … en los grupos misticos se dice que los terremotos seran los causantes que los polos magneticos vuelvan a coincidir con los polos geograficos , los cuales estan desfasados aprox 40 grados, en ese momento solo existira en todo el mundo la estacion primaveral como hace miles de años

Arrepientense pecadores el fin esta cerca.

como terminará el mundo, la respuesta sería el mundo terminará destruido por el pecado del hombre todos los acontecimientos de la segunda venida de cristo ya se ve en diferentes partes del mundo

Est ce pour cela que la lune été si grosse ce matin ?

Written by Caprescu

martie 3, 2010 at 1:14 am