30 July, 2012
Fractal Universe, we are all connected
26 July, 2012
For Borrowed Time [Acoustic] - Onward, ETC - Rosco Wuestewald & KC Olsen
Imagining a World Without Money
Etiķetes:
new world,
no money,
world without money
25 July, 2012
Malte Spitz: Your phone company is watching
http://www.ted.com
What kind of data is your cell phone company collecting? Malte Spitz
wasn't too worried when he asked his operator in Germany to share
information stored about him. Multiple unanswered requests and a lawsuit
later, Spitz received 35,830 lines of code -- a detailed, nearly
minute-by-minute account of half a year of his life.
Converting Your Car To An Electric Vehicle
Gasoline-powered cars. They are perhaps the most inefficient device
that many of us use daily. We really should all be driving electric
vehicles (or none at all see this post). The internal combustion engine is inefficient in term of pollution, gas costs and maintenance costs (this page
explains why electric cars are 90% cleaner than gas-powered cars). But,
as you may have heard, there are no electric vehicles available today
that resemble conventional cars or trucks. Companies like Phoenix Motorcars, Tesla Motors, Commuter Cars and Miles Automotive Group and ZAP
are coming close, but you still can't plunk down some cash and buy an
electric car from them today. The only type of electric cars that can be
purchased are NEVs (Neighbor Electric Vehicles), which usually have a
top speed of about 25 MPH. But wait -- there are still a couple ways to
acquire a working electric car right now. One option is to buy a used
vehicle that somebody else has converted to an electric vehicle. You can
search for use electric vehicles on sites like Craig's List, eBay, or EVFinder. For more advice on buying an used electric car, I would refer you to Shari Prange's recent article "Finding and Buying A Used Electric Vehicle" (PDF FIle) in Home Power Magazine No 119.
But
these used electric cars are certainly limited in their availability,
especially if you don't live on the West Coast. So may wish to take a
plunge and do an electric conversion yourself.
Basically, electric
conversion involves removing the entire internal combustion engine from
a vehicle, installing an electric motor in its place, and also adding a
large bank of batteries. A conversion will cost you about $6000 in
parts, and about $1000-$3000 for batteries and installation. But, for
all this expense, you'll get a zero-emissions vehicle that costs only a
few cents per mile to run. Your electric car will also be more reliable
and require much less maintenance that a conventional one. Remember that
gas-powered cars cost the owner about $1800 per year on average for
fuel costs alone, and there is the addition expense of engine
maintenance and oil changes. Electric cars have a better resell values,
and are more reliable overall because there are fewer parts to fail.
Most of the components are solid-state electronics with no moving parts.
The engine of an electric car has a virtually infinite lifespan — the
components will probably outlast the chassis. The only real expense is
the batteries, which will need to be replaced about every 3 to 4 years.
You
can expect your converted vehicle to have a range of 60-80 miles, a top
speed of 50-90 MPH, and good acceleration capabilities. It will take
about 6-12 hours to completely recharge the car. All of these factors
will vary, based on the weight of the car you convert, and the type of
engine and batteries you install.
So, what type of car is the best
candidate for an electric conversion? A light car (2000-3000 lbs. curb
weight) with a manual transmission.You want a light vehicle, because
heavy ones severely restrict the range of the electric engine. Automatic
transmissions use up too much power because they require the engine to
be constantly idling. As far as body style, you need something that can
hold all the batteries you'll be installing. Michael Brown, author of Convert It,
recommends a car that is light and roomy like a Rabbit, Civic, Sentra,
Escort or light pickup truck. The ideal donor car has a good body and
interior, sound transmission, but a dead engine.
For electric
cars, the best type of driving is an area that is not too hilly and not
too cold. Hills obviously put a larger burden on the engine, and thus
reduce its range.Cold weather will also reduce performance, but there
are many happy electric car owners who live in Canada and Alaska.
There
are two types of electric conversions kits available: custom kits that
are tailored to a specific vehicles models, and universal kits that can
be installed in a variety of vehicles. Universal kits contain all the
essential drive-system components but rely on the builder to create
custom parts like battery racks or boxes. Custom kits include the entire
drive system and battery racks and boxes, customized to suit a
particular model. For example, a company called Canadian Electric Vehicles provides kits to convert Chevy S10 trucks, Geo Metros and Dodge Neons. Another company, Electro Automotive, provides kits to convert Volkswagen Rabbits and Porsche 914s.
Here's a brief history of electric cars.
Here are some online forums about electric conversions: Electric Vehicle Discussion List, DIY Electric Car Forums, EVWorld.
http://www.treehugger.com/culture/converting-your-car-to-an-electric-vehicle.html
http://www.treehugger.com/culture/converting-your-car-to-an-electric-vehicle.html
Etiķetes:
auto,
conversion,
conversion kit,
electric car,
elektrība,
elektriskais auto
22 July, 2012
What we know about the Moon?
The film that challenges anyone to prove that the Moon is grey. This
film proves the Moon is a full color celestial body and that there are
incredible structures and towers built by "someone" that has the ability
to build a structure ten miles wide and six miles high within an eight
month period. The evidence is presented and you will be amazed at what
you will see in this film.
19 July, 2012
13 July, 2012
06 July, 2012
Saules enerģija var kļūt par dārgāko kļūdu Vācijas enerģētikas vēsturē
Vācijas miljardiem eiro vērtais atjaunojamo enerģijas resursu
infrastruktūras izveides plāns var kļūt par dārgāko kļūdu valsts
enerģētikas vēsturē. Paredzētās investīcijas var sāpīgi ietekmēt vāciešu
maciņu, bet pievēršanās saules enerģijai atstāj novārtā lētākus
atjaunojamos resursus.
Tomēr saules enerģijas nozarei ir spēcīgs lobijs un politiķi tam nespēj pretoties, raksta Vācijas laikraksts Spiegel,
norādot, ka nesen jaunais Vācijas vides ministrs Peters Almeiers (Peter
Almaier) tikās ar Vācijas atjaunojamo resursu nozares pārstāvjiem un
sarunu rezultātus Vācijas sabiedrība drīzumā sajutīs ar lielākiem
elektroenerģijas rēķiniem.
Tā jau nākamgad ir visai
liela iespēja, ka trīs cilvēku liela vāciešu ģimene elektrības rēķinos
papildus samaksās 175 eiro, lai valsts izveidotu atjaunojamās enerģijas
infrastruktūru.
Vācijas medijs atzīmē,
ka plānā iekļauti ievērojami atvieglojumi saules enerģijas nozarei, kas
esot visdārgākā atjaunojamās enerģijas tehnoloģija, kā arī maz piemērota
Vācijas klimatam. Spiegel raksta, ka iepriekš pats P. Almeiers
kritizējis Vācijas saules enerģijas plānus, kas valstij nesīšot
papildus izdevumus vairāku miljardu eiro apmērā. Tomēr tagad, pēc
nokļūšanas vides ministra amatā, viņš esot mainījis savu viedokli.
Enerģētikas eksperti
aprēķinājuši, ka Vācijas atjaunojamo energoresursu programma līdz 2030.
gadam izmaksās 300 miljardus eiro. Lai to panāktu, Vācijas elektrības
rēķinos iekļautā nodeva, ienākumi no kuras tiek veltīti atjaunojamo
enerģijas resursu infrastruktūras izveidei, palielināsies no
pašreizējiem 3,59 centiem līdz desmit centiem par kilovatstundu.
Laikraksts uzsver, ka tas ir pretrunā ar kancleres Angelas Merkeles
solījumu – samazināt šo nodevu līdz 3,5 centiem.
Aprēķināts, ka fotoelementu elektrostaciju
un māju ar saules paneļiem īpašnieki šogad savas kabatas varēs
papildināt ar deviņiem miljardiem eiro, taču Vācijas enerģijas
nodrošināšanai viņu devums ir tikai četri procenti. Tāpat laikraksts
uzskaita dažādas problēmas, kas saistītas ar saules enerģiju –
tehnoloģiju dārgums, nespēja darboties gadalaika tumšajā laikā,
neefektīgums u. c. Tādējādi saules enerģijas sistēmas ieviešana
varētu kļūt par dārgāko kļūdu Vācijas enerģētikas vēsturē, kā arī nav
izslēgts, ka valstij nāksies importēt kodolenerģiju no Francijas.
Iepriekš vēstīts, ka Vācijas valdošā
koalīcija apņēmusies līdz 2022. gadam slēgt visus valstī darbojošos
kodolreaktorus, kā arī līdz 2020. gadam samazināt elektroenerģijas
patēriņu par 10%.
Valdības plāns paredz vienlaikus ar AES
slēgšanas plānu samazināt elektroenerģijas lietošanu par 10% līdz 2020.
gadam un dubultot atjaunojamo enerģijas avotu izmantošanu līdz 35%
procentiem tādā pašā laikposmā. Tiek saglabāti arī valdības plāni līdz
2020. gadam samazināt siltumnīcas efektu izraisošo gāzu emisiju par 40%.
http://www.db.lv/pasaule/saules-energija-var-klut-par-dargako-kludu-vacijas-energetikas-vesture-374992
Etiķetes:
atjaunojamie resursi,
enerģija,
fotoelementi,
saule,
saules baterijas,
vācija
Here's how the famous Higgs particle gives things mass
Forget equations, physicists tend to explain process in terms of sports and syrup
A computer graphic shows a typical Higgs boson candidate event,
including two high-energy photons whose energy (depicted by red towers)
is measured in the Compact Muon Solenoid's electromagnetic calorimeter.
The yellow lines are the measured tracks of other particles produced in
the collision. The pale blue volume represents the CMS' crystal
calorimeter barrel.
The infamous Higgs particle has a weighty task: It grants all
the other elementary particles their mass. Without it, they — we — would
zip around frantically at the speed of light, too foot-loose to form
atoms. But how does the Higgs do it?
In lieu of equations, physicists tend to explain the process in terms of sports and syrup.
First, each of the elementary particles acquires its unique set of
attributes by interacting with invisible entities called fields. Like
football fields, these are large stages upon which individuals (be they
electrons or running backs) dash this way and that, and occasionally
bash together. But unlike football fields, the fields of physics are
three-dimensional, and extend infinitely in all directions.
One such field is the electromagnetic (EM) field — the kind you can feel near the poles of a red and silver bar magnet,
but which actually exists everywhere all the time. Each particle
interacts with the EM field in a way that depends on its electric
charge. For example, electrons, whose charge is -1, tend to move through
the field toward the positive ends of bar magnets, and to clump
together with positively charged protons.
Like a sports field with its corresponding ball, each field of
physics has a corresponding particle. The EM field, for example, is
associated with the photon, or particle of light. This correspondence
plays out in two ways: First, when the EM field is "excited," meaning
its energy is flared up in a certain spot, that flare-up is, itself, a
photon.
Secondly, when particles interact with the EM field (for example,
when they are drawn toward the oppositely charged end of a magnet), they
experience the field by absorbing and emitting a constant stream of
"virtual photons" — photons that momentarily pop in and out of existence
just for the purpose of mediating the particle-field interaction.
There also exists a Higgs field. It gives particles mass. [ How Do You Weigh an Atom? ]
Except for massless photons and gluons, "all elementary particles get
their masses from their interactions with the (Higgs) field, kind of
like being 'slowed down' by passing through a thick syrup," explained
James Overduin, a physicist at Towson University in Maryland.
Some particles have a harder time trudging through the syrupy Higgs
field than others, and as a result, they're heavier. However, it isn't
known why certain particles, such as the extremely corpulent top quark,
are thousands of times more encumbered by the Higgs field than are
lightweight particles, such as electrons and neutrinos. "Theorists have
been searching for some way to actually predict (particle) masses from
first principles. No convincing theory has yet emerged," said John
Gunion, author of "The Higgs Hunter's Guide" (Basic Books, 1990) and a
professor of physics at the University of California, Davis. [ Are There Higgs Bosons in Space? ]
But here's where the Higgs particle comes in: Just as the photon
mediates interactions with the EM field and is itself an excitation of
the EM field, the Higgs particle mediates interactions with the Higgs
field, and is itself an excitation of the Higgs field.
Particles trudge through the Higgs field by exchanging virtual Higgs
particles with it. And a real Higgs particle surfaces when the field
becomes excited, like a slosh of the syrup. Detecting such a slosh (i.e.
the particle) is how physicists can be sure the syrup (i.e. the field)
exists. "You have to get enough energy to excite the field so that it
looks like a particle to us. Otherwise we don't know the field is
there," Craig Blocker, a Higgs-hunting physicist at Brandeis University,
told Life's Little Mysteries.
But because the Higgs particle is extremely high-energy (or,
equivalently, very heavy), it's tough to excite the Higgs field enough
to create one. That's where the Large Hadron Collider comes in: by
smashing together high-speed protons, it generates enough juice to slosh
the syrupy Higgs field around now and again, producing Higgs bosons.
http://www.msnbc.msn.com/id/48062124/ns/technology_and_science-science/#.T_Xzb783nQY
Etiķetes:
energy,
higgs boson,
higgs prticle,
small particles
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