Jumping Jack Flash weblog

Terremoto sumatra

Posted in terremoto by jumpjack on 30 settembre 2009

Da una preanalisi molto approssimativa, questo sembrerebbe essere il sismogramma del terremoto di Sumatra del 2009:

terremoto-sumatra-2009

Non sono pero’ sicuro della scala dei tempi, sembra piuttosto strana una scossa lunga alcuni minuti!

Tuttavia si tratta di dell’onda BHZ, quindi 20 Hz dovrebbe essere corretto… ??

——-

Confronti con altri terremoti:

terremoti-confronti

New test with IR receiver/transmitter using sound card

Posted in Infrarossi by jumpjack on 30 settembre 2009

Some tests have been performed using an Asus EEEPC 701 4G to both sample and play remote control signals.

EEEPC looks to have an high capabilities sound card, which allows sampling up to 154000 Hz; this allows properly sampling the original 38000 Hz carrier rather than just its presence/absence.

Standard audio card sampling:

Asus EEEPC sampling:

tv-org

Using this sample, some tests hav been performed to determine if, how and when the EEEPC is capable of controlling the TV set which the remote belongs to.

Results are weird: ONE single LED appear to be enough to control the TV set, but NOT using the original sampled signal; instead, an artificial signal made out of a 19000 Hz tone and “mixed” into a stereo signal made up of inverted signals is needed to properly control the TV set.

tv-art-mono

tv-art-stereo

tv-art-stereo-44100

Esobiologia – vita nello spazio

Posted in astronomia by jumpjack on 24 settembre 2009

Raccolta di link assortiti contenenti indizi e notizie utili sulla possibilità di esistenza di vita al di fuori del pianeta Terra.

Pianeti extrasolari – siti

Enciclopedia dei Pianeti Extrasolari in italiano (con grafici)

Altro sito italiano (divulgativo)

Pianeta nano extrasolare (il piu’ piccolo scoperto finora, piu’ piccolo della Terra) PSR B1257+12 D

http://exoplanets.org/

http://www.extrasolar.net/evmain.asp

http://www.extrasolar-planets.com/

http://planetquest.jpl.nasa.gov/

http://www.kepler.arc.nasa.gov Programma “Keplero”

The Geneva Extrasolar Planet Search Programmes

Tabella pianeti extrasolari scoperti.

Tabella 2 (aggiornata luglio 2009).

Tabella in italiano ordinabile per dimensioni e altri campi.

Pianeti “notevoli” (il piu’ piccolo, il piu’ “terrestre”, ecc…).

Pianeti extrasolariNotizie

Astronomers search for habitable moons

Scoperti due pianeti vicini: uno viene usato per studiare l’altro

Russia progetta sonda verso satellite Giove, cerca vita su Europa

Europei individuano l’exopianeta più leggero (Gliese 581E; nel sistema Gliese sono stati finora trovati 4 pianeti: b, c, d, e. Il pianeta E ha 1,9 masse terrestri.)

Missioni/telescopi

  • COROT stands for Convection Rotation and planetary Transits and is a big step forward for the ESA for the search after extrasolar planets.
  • The Kepler Space Telescope from NASA is designed to discover Earth-like planets orbiting other stars
  • Herschel is the largest space telescope ever launched. Its 3.5 m-diameter mirror will give astronomers their best view yet of the Universe at far-infrared and sub-millimetre wavelengths
  • The European Darwin Mission will be a flotilla of four or five free-flying spacecraft that will search for Earth-like planets around other stars and analyse their atmospheres for the chemical signature of life in the mid of the next
  • The Terrestrial Planet Finder is a mission which primary target is to search after Earth-like planets
  • The Space Interferometry Mission is also known as SIM Lite andwas formerly known as SIM PlanetQuest
  • Wide-field Infrared Survey Explorer – WISE – a infrarossi – lancio previsto 9 dicembre 2009
  • Panoramic Survey Telescope & Rapid Response System – PAN-STARRS – The four PanSTARRS cameras will each be the largest digital cameras ever built. Each camera will have about 1.4 billion pixels spread over an area about 40 centimeters square.

Enciclopedia pianeti extrasolari:
http://exoplanet.eu/index.php

———-

NOTIZIE

17 marzo 2010

scoperto il primo pianeta extrasolare con temperature simili a quelle della Terra
http://www.corriere.it/scienze_e_tecnologie/10_marzo_17/corot-pianeta-clima-mite_01153ad8-31f1-11df-b03c-00144f02aabe.shtml

Temperature tra -20 e 160° centrigradi.
Anno di 95 giorni.
1500 anni luce dalla Terra.
Gravita’ circa 2g.

Purtroppo pero’ ha massa pari quasi a quella di Giove (0.84) ed è un pianeta gassoso….

http://en.wikipedia.org/wiki/COROT-9b

Corot aveva già scoperto Corot-7b, un pianeta roccioso grande 4 volte la terra… ma con temperatura superficiale oltre i 1000° C!
http://en.wikipedia.org/wiki/COROT-7b

Ci vorrebbe una via di mezzo… su cui puntare un bell’antennone! 😀

———

2 dicembre 2010

Scoperto batterio terrestre che si nutre di arsenico e lo incorpora nel suo DNA:

They have somehow been able to utilize arsenic, using it instead of phosphorus in their biochemistry. To determine this, Dr. Wolfe-Simon took samples of the microbes, adding more and more arsenic while decreasing the amount of phosphorus in their environment to essentially zero. This would kill almost everything known to man, yet these little critters thrived. Even weirder, the bacteria were able to survive when either the phosphorus or the arsenic was reduced, but not both. So somehow, it’s able to use both of these elements as needed to survive.

Amazingly, using radioisotope-tagged molecules containing arsenic, they were able to find that the microbes incorporated the arsenic into their very DNA! It’s hard to stress how shocking this is; as I understand it, saying something like that to a microbiologist without evidence would’ve had them slowly backing away from you and looking for weapons or an escape route.

http://www.space.com/scienceastronomy/arsenic-bacteria-alien-life-101202.html

 

7 dicembre 2010

I dati di Keplero su alcune centinaia di nuovi esopoaneti verranno rilasciati, dopo controlli e verifiche, a febbraio 2011:

http://kepler.nasa.gov/news/mmu/index.cfm?FuseAction=ShowNews&NewsID=83

 

11 dicembre 2010

Mini documentario ESA di 8 minuti: http://www.esa.int/esaCP/SEMZN4PR9HG_Italy_0.html

Programmare in python cellulari Symbian 3rd

Posted in Symbian by jumpjack on 19 settembre 2009

Per via delle protezioni di symbian 9.x presente nei cellulari Symbian 3rd e 5th (la 4th non esiste per motivi di superstizione, cercate su google…), scrivere programmi in pys60 e’ piuttosto complicato…

Bisogna:

Scaricare la shell non firmata (unsigned) (per esempio questa)

Firmarla online

Installarla (se ce n’e’ una già installata, prima toglierla, altrimenti quella nuova non si installa proprio!)

NOTA: con python 1.4.x e precedenti sui 3rd edition , TUTTI i moduli aggiuntivi vanno installati in C:\ , senno’ non sono visibili!!!

Handling Symbian 3rd SIS file

Posted in Symbian by jumpjack on 19 settembre 2009

SISInfo
unpacking  and creating (command line):
http://www.niksula.cs.hut.fi/~jpsukane/sisinfo.html

SISContents:
Unpacking (also supports “phantom” .sis left by system after installation):
http://www.4shared.com/file/110753662/74bd1ef3/SISContents_130.html

SISXplorer:
Unpacking
http://www.symbian-toys.com/sisxplorer.aspx

ENSYMBLE: (richiede openssl in c:\openssl\bin)
Unpack/hack/pack
http://www.nbl.fi/~nbl928/ensymble.html
http://code.google.com/p/ensymble/

Online debugging of SIS files:
http://www.whythefuckwontmysisfileinstall.com/guide.html

Creare un file .SIS per un’applicazione Python pys60:
http://developer.symbian.org/wiki/index.php/PyS60_Standalone_Applications_(Python_on_Symbian)#Application_Packager

Con l’Application Packager sembra che serva anche un certo “python runtime”, incluso in questo pacchetto da 34 MB…

http://www.forum.nokia.com/info/sw.nokia.com/id/91d89929-fb8c-4d66-bea0-227e42df9053/Open_C_SDK_Plug-In.html

Esperimento Fusione Fredda Prof. Arata del 2008: replica nel 2009

Posted in Uncategorized by jumpjack on 7 settembre 2009

Pare sia stato replicato con successo da un laboratorio indipendente l’esperimento di Fusione Fredda del 2008 del Prof.Arata:

Link ad alcuni forum di discussione sul’argomento:

HW-Upgrade

Energeticambiente

Geocities is closing, time for backup!

Posted in varie by jumpjack on 4 settembre 2009

Geocities is going to close its server soon, it’s time to make a backup.

Unfortunately, Geocities does not offer any method of backup but right-cliking on each file!

Here it comes in help WGET, both available for Linux and Windows.

Use this simple command to mirror your entire site; the -c switch should allow wget to restart from  in case it stops due to geocities bandwidth limit.

wget -m -c http://www.geocities.com/username

No need to create a folder, wget will create it automatically and it will also preserve your folders structure.

Same method can be used to backup a WordPress.com blog:

wget -m -c http:/USERNAME.wordpress.com

Please note that to get WGET working behind a proxy you need to set an enviroment variable in advance:

set http_proxy=servername:port