miércoles, 3 de septiembre de 2008

Un poco de musica

Grid computer recreates ancient Greek lute

Geeks go Greek


Researchers have harnessed the awesome power of grid computing to answer one of the great mysteries facing mankind: what exactly does an epigonion sound like?

At the risk of stating the obvious, an epigonion is a stringed instrument plucked by the ancient Greeks, and there aren't many around these days. To recreate the sound, a model of the instrument was built up from pictures and archaeological evidence, and this data was fed into ASTRA - Ancient instruments Sound/Timbre Reconstruction Application - which creates the sound.

Obviously modelling the sound requires a massive amount of computing power - about four hours of processing using both GILDA and EUMEDGRID grid computing infrastructures is needed to produce 30 seconds of music.

Dr La Rocca, co-ordinator of ASTRA, said in a statement: "Previously the amount of computing power needed to recreate ancient music was unobtainable, but the use of high capacity research networks provides us with the ability to turn our research into reality."

Hopefully ASTRA will be able to model other instruments, otherwise one can't help wondering if it might have been quicker to just knock up a real epigonion and have a strum, though that wouldn't have been nearly so much fun.

The resulting sound is depressingly similar to that played at the end of Four Winds Mah Jong, but an mp3 is available to those interested. It's probably safe to say the tune is beyond copyright by now.

SII YA SE QUE ES CULTUROSO, PERO, INTERESANTE

Robado de The Register

lunes, 1 de septiembre de 2008

esta pelicula ya la vi, robado de NYT

Surge in Natural Gas Has Utah Driving Cheaply

SALT LAKE CITY — The best deal on fuel in the country right now might be here in Utah, where people are waiting in lines to pay the equivalent of 87 cents a gallon. Demand is so strong at rush hour that fuel runs low, and some days people can pump only half a tank.

It is not gasoline they are buying for their cars, but natural gas.

By an odd confluence of public policy and private initiative, Utah has become the first state in the country to experience broad consumer interest in the idea of running cars on clean natural gas.

Residents of the state are hunting the Internet and traveling the country to pick up used natural gas cars at auctions. They are spending thousands of dollars to transform their trucks and sport utility vehicles to run on compressed gas. Some fueling stations that sell it to the public are so busy they frequently run low on pressure, forcing drivers to return before dawn when demand is down.

It all began when unleaded gasoline rose above $3.25 a gallon last year, and has spiraled into a frenzy in the last few months.

Ron Brown, Honda’s salesman here for the Civic GX, the only car powered by natural gas made by a major automaker in the country, has sold one out of every four of the 800 cars Honda has made so far this year, and he has a pile of 330 deposit slips in his office, each designating a customer waiting months for a new car.

“It’s nuts,” Mr. Brown said. “People are buying these cars from me and turning around and selling them as if they were flipping real estate.”

Advocates for these cars see Mr. Brown’s brisk sales as a sign that natural gas could become the transport fuel of the future, replacing much of the oil the nation imports. While that remains a distant dream, big increases recently in the country’s production of natural gas do raise the possibility of making wider use of the fuel.

To a degree, it is already starting to happen in Utah, where the cost savings have gotten the public’s attention. Natural gas is especially cheap here, so that people spend about 87 cents for a quantity of gas sufficient to propel a car approximately the same distance as a $3.95 gallon of gasoline.

The word about natural gas cars has been spreading in news reports and by word of mouth, and so many people in Utah are now trying to get their hands on used natural gas vehicles that they are drying up the national supply. Used car lots are stocking up, and beginning to look like county government parking lots with multiple lines of identical white Civic GXs once used in out-of-state fleets.

Gov. Jon M. Huntsman Jr. got into the act last year, spending $12,000 out of his own pocket to convert his state sport utility vehicle to run on natural gas. “We can create a model that others can look to,” Mr. Huntsman said in an interview. “Every state in America can make this a reality.”

In fact, some unique factors apply in Utah. Natural gas prices at the pump here are controlled and are the cheapest in the country, while the price of conventional gasoline is one of the highest. Questar Gas, the public utility, has compressed-gas pumps around the state open to the public, a fueling infrastructure that few states can match.

Special factors or not, the sudden popularity of natural gas vehicles here demonstrates their potential, according to advocates like T. Boone Pickens, the Texas oil billionaire who is financing a national campaign promoting wind power and natural gas to replace imported oil. “Utah shows that the technology is here and the fuel works and the fuel is better than foreign oil,” Mr. Pickens said.

Natural gas cars produce at least 20 percent less greenhouse gas per mile than regular cars, according to a California study.

No official figures are available on how many natural gas vehicles Utah has, in part because so many people go to garages that install conversion kits that are not certified by the Environmental Protection Agency and are therefore illegal.

(Governor Huntsman has expressed concern, and some in the installation business have requested that the E.P.A. close down the unauthorized operations; the agency says it does not comment on possible investigations.)

But Questar estimates the number at 6,000 and growing by several hundred a month. That is small compared with the 2.7 million vehicles registered in the state, but natural gas executives and state government officials say it makes Utah the fastest-growing market in the country for such cars.

Cars fueled by compressed natural gas have been available intermittently in the United States for decades, and have found wide use in fleets, but have never attracted much consumer interest. The situation is markedly different abroad. Of the eight million natural gas vehicles operating worldwide, only about 116,000 were in the United States, mostly as fleet vans, buses and cars, according to a 2006 Energy Department estimate.

Congress mandated the use of fleets capable of using alternative fuel cars for governments and some energy companies in the early 1990s, but public interest petered out as gasoline prices plummeted. Over the years, all the major car companies except Honda dropped their production in the United States.

The cars have two major disadvantages — a shortage of fueling stations and limited range. (A typical natural gas car goes half as far on a full tank as a gasoline car.) Utah is one of the few states where a driver can travel across the state without being out of range of a station.

The situation is a Catch-22: Carmakers do not want to make natural gas cars when few filling stations are set up for them, and few stations want to install expensive equipment to compress gas with so few cars on the road.

Hundreds of stations supply compressed gas in a few states like California, New York and Arizona, but most are either closed to the public or charge only modestly less than regular gasoline prices.

Retail natural gas prices in some states are triple the price in Utah. The only state that comes close to Utah’s low gas prices is Oklahoma, and a surge of natural gas car buying is going on there, too.

The natural gas industry and some politicians are pushing to open up the market to gas-powered vehicles across the country. Even in states without fueling stations, a few drivers have switched by spending several thousand dollars to install a home gas compressor.

A proposal on the ballot in California this fall would allow the state to sell $5 billion in bonds to finance rebates of $2,000 and more to buyers of natural gas vehicles. Legislation has been introduced in Congress to offer more tax credits to producers and consumers and mandate the installation of gas pumps in certain service stations, with the goal of making natural gas cars 10 percent of the nation’s vehicle fleet over the next decade.

“If the incentives are right and the fuel and cars are available, natural gas can work,” said Gordon Larsen, supervisor for natural gas vehicle operations at Questar Gas. But he said that any drop in gasoline prices douses enthusiasm among drivers considering the switch.

With gasoline hovering just below $4 a gallon for unleaded regular here, interest in the Salt Lake City area is strong.

Questar reports that the volume of natural gas pumped at its 21 filling stations is up 240 percent this year from last, after a 50 percent rise in 2007. Demand has grown so fast that the compressors at many of Questar’s stations run low during the day, forcing drivers to settle for half a tank or fill up during off-peak hours.

The natural gas car surge in Utah is because of several factors. Questar has had filling pumps around the state to fuel its own fleet of service vehicles since the 1980s, and because it had excess capacity, it opened those stations to the public. Natural gas prices are cheap because under Utah regulations, the utility is obliged to offer about half of the gas that it sells to its retail customers at the cost of production.

The state and a few municipalities are preparing to open more filling stations. If the trend continues, it could eventually lower the environmental impact of driving in Utah.

For now, demand for compressed-gas cars is outstripping supply.

“People get into a frenzy and they just have to buy,” said Rick Oliver, owner of a company that converts vehicles. He said that in a recent online auction, a Utah buyer paid $19,000 for a 2001 Civic GX with 50,000 miles — the price a buyer of a new GX would pay after state and federal tax credits.

Gary Frederickson, a 48-year-old computer technician, has bought six natural gas vehicles on Craigslist over the last year, flying as far as Portland and Oakland to pick up the cars. One 1998 Ford Contour he bought for $3,000 in effect cost him nothing because he will receive a $3,000 state tax credit for buying an alternative fuel car.

“It’s crazy to be in Utah and have access to 85-cent-a-gallon fuel and not take advantage of it,” he said before a recent 2-cent increase.

domingo, 31 de agosto de 2008

Clima

Uno sabe que viajò, que llego, pero, como mas o menos dijo alguien, sigue en donde partio, hasta, que un paisaje, un aroma, una frase, le dicen que no, que esta en otro lado
la frase?

Are you talking to me? dicho por un taxista, yendo al centro

martes, 19 de agosto de 2008

Tipos desconocidos

Raro que no figura en el panteon de proceres argentos


Raúl Pateras Pescara de Castelluccio (Buenos Aires, 1890 - París, 1966), Marqués de Pateras-Pescara, fue un abogado Argentino e inventor especializado en hidroaviones y helicópteros, como así también en motores, compresores, y en el llamado «Motor de pistón libre de Pescara.

Al comienzo del siglo XX, su familia regresó desde Buenos Aires a Europa. El trabajo con Gustavo Eiffel en investigaciones con un Túnel de viento para probar un modelo de Hidroavión Lanza torpedos llamado el "Pateras-Pescara".

En 1912, el ministro de la armada italiana evaluó el primer lanzador de torpedos acuático, basado en el modelo de Pescara. Pescara se encontró con Alberto Santos Dumont en París al comienzo de la primera guerra mundial.

En 1917, solicitó en España las patentes números 63.659, del 7 de abril de 1917, seguidas por otras 98 patentes más hasta 1929.
En 1919, Pescara construyó varios helicópteros de hélices contrarrotativas principalmente descritos en su décima patente francesa número 533.820 enviada desde España el 21 de febrero de 1920. Titulada "Rational Helicopter" esta patente de hecho describe a un verdadero helicóptero. Desde 1919 hasta 1923, envía más de cuarenta patentes a varios países.
Provisto de uno de estos vehículos de doble rotor coaxial, el 18 de Abril de 1924 fue capaz de alcanzar un nuevo récord mundial de vuelo con 736 metros de recorrido en 4 minutos 11 segundos. (Aproximadamente 13 km/h) a una altura de 1,8m.

En 1929, junto a su hermano Henri, el ingeniero Italiano Moglia, y el gobierno español, funda la Fabrica Nacional de Automóvilescon una inversión de 70 millones de pesetas.

El Nacional Pescara fue exhibido en 1931, en el gran palacio.En 1931 este auto de ocho cilindros gana la carera del Grand Prix de la costa europea. La Guerra civil española fuerza a Pescara a regresar a Francia. El 28 de Febrero de 1933, la compañía Pescara Auto-compressor fue dada a conocer en Luxemburgo. Los registros públicos muestran su dirección como Bv. Royal 33. Se mantuvo activo comercialmente durante 30 años, respaldado por 6 patentes francesas. Uno de los accionistas fue Pescara & Raymond Corporation con base en Dover, Delaware, USA.
Durante la segunda guerra mundial, Pescara trabajó en equipos para energía eléctrica en Portugal. El motor de pistón libre acaparó la atención nuevamente cuando fue producido en forma masiva por SIGMA, empresa que desarrollo el GS34, un generador de 1200-HP. Pescara se reúne con sus hijos en París en 1963 donde cumplió tareas como experto en S.N Marep para las pruebas del motor de 2000-HP el ELPH 40.
El 29 de diciembre de 1965, delega el mando a su hijo mas pequeño Christian de Pescara para llevar adelante todas las tareas de los negocios relacionados con las maquinas de pistón libre para su desarrollo y sus diversas aplicaciones en la industria.
Raúl Pateras-Pescara propone luego la producción de maquinas mas potentes (nuevos generadores en tandem basados en los generadores clásicos EPLH 40 y GS34 con fotos disponibles en su sitio oficial. La creación de una compañía para aplicar estos conceptos estaba en camino cuando muere Pescara.

lunes, 18 de agosto de 2008

canibalismo y Kuru

U me hizo acordar de esto

Kuru

Nativo de Nueva Guinea
Nativo de Nueva Guinea

El kuru o "muerte de la risa" es una enfermedad  neurodegenerativa e infecciosa causada por un prion

. La palabra kuru significa en lengua aborigen "temblor, con fiebre y frío", uno de los signos que manifiestan los afectados por dicha enfermedad. Fue inicialmente descrita a comienzos del siglo XX en Nueva Guinea, y comenzó a investigarse de manera científica en la década de los 50.

Su desarrollo es lento, y el período de incubación puede durar hasta 30 años. Una vez que se manifiestan sus síntomas resulta letal, y los pacientes fallecen en el plazo de un año.

Inicialmente se pensó que era una enfermedad hereditaria, ya que afectaba a los miembros de una tribu nativa de Nueva Guinea. Sin embargo, tras las investigaciones de Gadjdusek se demostró que en realidad estaba causada por un agente infeccioso, transmitido por la ingestión de tejidos cerebrales de personas difuntas con la intención de adquirir la sabiduría durante los ritos funerarios. Gajdusek descubrió que lo que se transmitía en realidad era un agente infeccioso que denominó "virus lento", y que posteriormente Stanley B. Prusiner  llamó un prion.


De Wikipedia



lunes, 4 de agosto de 2008

Microsoft, joda y el marketing viral

O, como probe los 6 grados de separacion mirando en Messenger

Microsoft 'proves' six degrees of separation theory

All corporate news is six steps away from reality


Microsoft researchers claim to have proved the pop-social-psychology shibboleth that we are no more that six degrees of separation removed from any other human being on the planet.

The six degrees of separation theory first espoused by Stanley Milgram has given students and newspaper columnists something to talk about since the late 1960s.

Researchers at Redmond apparently took it upon themselves to analyse messages sent by users of its IM service in June 2006. The database of messages – stripped of identifying information we are assured – yielded 180 billion pairs of users.

The researchers found that 78 per cent of the pairs could be connected in seven hops or less, and that the average number of hops from one individually to another was 6.2. However, before you start thinking that you might be able to get into Natalie Portman’s inbox by the end of the day, the researchers said some users could only be connected by 29 hops.

"What we're seeing suggests there may be a social connectivity constant for humanity," Eric Horvitz, one of the researchers told the Washington Post. "People have had this suspicion that we are really close. But we are showing on a very large scale that this idea goes beyond folklore."

Which is fine as long as you believe that humanity consists of people in rich countries who are rich enough to own computers and so time-rich they they can sit around playing on IM all day, rather than, say, growing food to feed their families.

Interestingly, a search of the Microsoft website throws up no details of the research, and all the coverage seems to be traceable back to the Washington Post story on Saturday.

Which simply demonstrates the long-held popular belief that 79 per cent of what you read is no more than seven degrees of separation away from a canned PR briefing from a comms professional to a tame journalist on a major newspaper.

Cortesia de The register, chusmerio tecnologico de 1ra

domingo, 3 de agosto de 2008

Voodoo sciences ( 1 de n)

Dado que a alguna gente le gusto el termino, aqui empezamos un poco de lo que le afano al creador ( en rigor el dice que a la reaganomics la llamaron voodoo economy)

enjoy

Insultos, por favor dejarlos en la SRA, gracias

(no pude con mi genio, disculpas)

"I wouldn't know anything about politics," my friend said the other day. "I'm only an engineer."

He happens to be a very good engineer, but he named his profession as if he were ashamed of it. I see this a lot. The social scientists are automatically assumed to know more about society and politics than the hard scientists--even when the subject matter is something like nuclear power.

I wouldn't be so sure.

Now go again to your typical university. Find an engineering students and a social science student. I'll bet you anything you like that the engineer will have read about as much history and literature and genuine liberal arts as the social scientist; while the social scientist will know nothing of engineering and physics, little of biology, and no mathematics. He may protest that he "took stat"; which will mean that he knows how to do cookbook calculations to produce the mean, median, and mode of a bunch of numbers. Given a little help he may also be able to compute the standard deviation; and with a textbook and a bit of luck he might even be able to do a "T" test, although the odds are that he won't have the foggiest notion of what the T test assumes.

Go now to a rally protesting a nuclear power plant. There'll be a lot of students here. How many will be engineers? And how many will be social scientists? Of the social scientists, how many will understand anything of nuclear physics? How many will know the difference between ionizing and non-ionizing radiation?

Engineering students may apologize for deficiencies in "culture." The man who started the People's Lobby, the first of California's mass anti-nuclear groups, used to say proudly, "The only physics I ever took was Ex-Lax."

The fact is that engineers and scientists will have studied far more of the liberal arts than social scientists will have of physics or engineering. (And, alas, neither will know any history.)