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Stanford scientists create a low-cost, long-lasting water splitter made of silicon and nickel

Stanford scientists create a low-cost, long-lasting water splitter made of silicon and nickel | Editoriales, Analisis, Noticias | Scoop.it
The new device uses light to split water into oxygen and hydrogen, a clean-burning fuel that can be used to generate electricity on demand.

 

Stanford University scientists have created a silicon-based water splitter that is both low-cost and corrosion-free. The novel device – a silicon semiconductor coated in an ultrathin layer of nickel – could help pave the way for large-scale production of clean hydrogen fuel from sunlight, according to the scientists. Their results are published in the Nov. 15, 2013, issue of the journal Science.

 

"Solar cells only work when the sun is shining," said study co-author Hongjie Dai, a professor of chemistry at Stanford. "When there's no sunlight, utilities often have to rely on electricity from conventional power plants that run on coal or natural gas."

A greener solution, Dai explained, is to supplement the solar cells with hydrogen-powered fuel cells that generate electricity at night or when demand is especially high. 

 

To produce clean hydrogen for fuel cells, scientists have turned to an emerging technology called water splitting. Two semiconducting electrodes are connected and placed in water. The electrodes absorb light and use the energy to split the water into its basic components, oxygen and hydrogen. The oxygen is released into the atmosphere, and the hydrogen is stored as fuel.

 

When energy is needed, the process is reversed. The stored hydrogen and atmospheric oxygen are combined in a fuel cell to generate electricity and pure water.  

 

The entire process is sustainable and emits no greenhouse gases. But finding a cheap way to split water has been a major challenge. Today, researchers continue searching for inexpensive materials that can be used to build water splitters efficient enough to be of practical use.


Via Dr. Stefan Gruenwald
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Científicos chilenos prueban inmunoterapia que frena el cáncer de próstata

Científicos chilenos prueban inmunoterapia que frena el cáncer de próstata | Editoriales, Analisis, Noticias | Scoop.it
La terapia, basada en TAPCells, es capaz de detener el avance de la enfermedad y contribuye a alargar la vida de los pacientes, según el equipo a cargo del avance.
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Open Educational Resources: Smart Policy -- InformationWeek

Open Educational Resources: Smart Policy -- InformationWeek | Editoriales, Analisis, Noticias | Scoop.it
Educators around the world are already using OERs to improve learning. Why haven't they been adopted on a broader scale? (Why haven't OERs been adopted on a broader scale?

Via Dr. Susan Bainbridge
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Becky Roehrs's curator insight, October 16, 2013 1:22 PM

Glad to see more support for OER!

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Which Social Media Platform is Right For Your Business

Which Social Media Platform is Right For Your Business | Editoriales, Analisis, Noticias | Scoop.it
A few days ago I posted a graphic showing only the basic social media platforms.  Today I found this graphic from Digital Insights that has current and interesting statistics and information about the largest and most popular social media sites.  ...

Via Dr. Susan Bainbridge
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Alison D. Gilbert's curator insight, October 28, 2013 9:04 PM

This will help you figure out what social media to use for your business. Personally, I like just about all of them.

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10 Excellent Video Editing Apps

10 Excellent Video Editing Apps | Editoriales, Analisis, Noticias | Scoop.it

It's usually an expensive endeavor, but thanks to smartphones, you can try your hand at shooting and editing video without the staggering price.


Via Vicente Montiel, LiderazgoEmpresarial
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Google to Launch Start-up Incubator in Israel

Google to Launch Start-up Incubator in Israel | Editoriales, Analisis, Noticias | Scoop.it
Google is setting up an “incubator” for technology start-ups in Israel, one of several ways the California-based Internet giant is trying to get an early look at innovations.

Via Jeff Makana, LiderazgoEmpresarial
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The Anatomy of an Education-Technology Startup

The Anatomy of an Education-Technology Startup | Editoriales, Analisis, Noticias | Scoop.it
There are 11 companies in the current cohort of Imagine K12, the only startup incubator program specifically for K-12 education technology. But the entrepreneurs that make up those companies come from a wide variety of backgrounds.

Via Costas Vasiliou
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Google to Launch Start-up Incubator in Israel

Google to Launch Start-up Incubator in Israel | Editoriales, Analisis, Noticias | Scoop.it
Google is setting up an “incubator” for technology start-ups in Israel, one of several ways the California-based Internet giant is trying to get an early look at innovations.

Via Jeff Makana
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OH: Tolloty Technology Incubator changes direction of 'Road to Nowhere' | New Philadelphia Times Reporter

OH:  Tolloty Technology Incubator changes direction of 'Road to Nowhere' | New Philadelphia Times Reporter | Editoriales, Analisis, Noticias | Scoop.it

 

For years, the Tuscarawas Regional Technology Park in New Philadelphia has sat empty.

 

Until now.

 

On Tuesday, a groundbreaking celebration was held for the $5.4 million facility that will serve as the gateway to the tech park. The location of the complex also is considered ideal because it is near Kent State University at Tuscarawas and Buckeye Career Center.

 

“This has the potential to be an economic game changer for our county and region,” said Tuscarawas County Commissioner Kerry Metzger, who was among 10 speakers to address a crowd of about 130 people.

 

The park, which was christened on more than 100 acres during a groundbreaking ceremony in 2006, now has the economic game-changing potential to enhance economic development opportunities and to create jobs. Call it a late bloomer.

 

Or a victim of bad timing. Officials created the park one year before the economy was about to take a really, really bad turn, otherwise known as the Great Recession.

 

Seven years later, the construction of the Tolloty center signifies action —
finally.

 

But it wasn’t easy getting there.

 

To secure funding, local officials jumped through various hoops to make the center a reality. One of the biggest victories was when Kent State University at Tuscarawas agreed to take ownership of the incubator, joining the Community Improvement Corp. of Tuscarawas County to secure a $2.3 million federal grant in 2010.

 Click headline to read more--


Via Chuck Sherwood, Senior Associate, TeleDimensions, Inc
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7 cosas que Internet cambiará en los próximos siete años, según Google

7 cosas que Internet cambiará en los próximos siete años, según Google | Editoriales, Analisis, Noticias | Scoop.it
Javier Rodríguez Zapatero, presidente de Google España, explica cómo Internet cambiará la forma en la que nos comunicaremos y relacionaremos en los años venideros.

Via Santiago Bonet
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NASA charts how stars evolve with a 160-megapixel image of neighboring galaxy

NASA charts how stars evolve with a 160-megapixel image of neighboring galaxy | Editoriales, Analisis, Noticias | Scoop.it

NASA has been spying on our neighbors. With the help of Pennsylvania State University, it's assembled a huge photo collage of the Large and Small Magellanic Clouds, two of the closest galaxies to our native Milky Way. The images, gathered with NASA's Swift telescope, create a picture that could let us track the formation of stars. But they're also amazing in their own right.


Via Luca Baptista
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17 Gadgets We Got Thanks To NASA

17 Gadgets We Got Thanks To NASA | Editoriales, Analisis, Noticias | Scoop.it
You probably use some of these things every day.

Via TechinBiz
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Guardar páginas web como PDF en nuestro equipo o Google Drive desde Chrome

Guardar páginas web como PDF en nuestro equipo o Google Drive desde Chrome | Editoriales, Analisis, Noticias | Scoop.it
Contamos con muchas opciones en aplicaciones o plugins que nos permiten descargar una página web de nuestro interés como PDF, que son muy prácticos. Pero sino estamos en nuestro equipo o no queremos complicarnos, es bueno recordar que también podemos tener el mismo resultado utilizando solo Google Chrome.

Desde unas versiones atrás Google Chrome nos ofrece más funciones desde la opción “Imprimir” y una de ellas es la posibilidad de crear un PDF de una página web para descargar a nuestro equipo. Para ello, solo tenemos que cambiar la configuración de “Destino” a “Guardar como PDF”.

...


Via evangelina chavez, Noemi Mabel Giorgi
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Investigadores brasileños presentan técnica para acelerar el diagnóstico de la leucemia

Investigadores brasileños presentan técnica para acelerar el diagnóstico de la leucemia | Editoriales, Analisis, Noticias | Scoop.it
El examen usa nanopartículas para detectar este tipo de cáncer, que no se forma como un tumor sólido, sino que mantiene células cancerígenas en circulación por la sangre.
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MIT: The Million-Year Data Storage Disk Unveiled

MIT: The Million-Year Data Storage Disk Unveiled | Editoriales, Analisis, Noticias | Scoop.it

Magnetic hard discs can store data for little more than a decade. But nanotechnologists have now designed and built a disk that can store data for a million years or more.

 

Back in 1956, IBM introduced the world’s first commercial computer capable of storing data on a magnetic disk drive. The IBM 305 RAMAC used fifty 24-inch discs to store up to 5 MB, an impressive feat in those days. Today, however, it’s not difficult to find hard drives that can store 1 TB of data on a single 3.5-inch disk. But despite this huge increase in storage density and a similarly impressive improvement in power efficiency, one thing hasn’t changed. The lifetime over which data can be stored on magnetic discs is still about a decade.

 

That raises an interesting problem. How are we to preserve information about our civilisation on a timescale that outlasts it? In other words, what technology can reliably store information for 1 million years or more?

 

Today, we get an answer thanks to the work of Jeroen de Vries at the University of Twente in the Netherlands and a few pals. These guys have designed and built a disk capable of storing data over this timescale. And they’ve performed accelerated ageing tests which show it should be able to store data for 1 million years and possibly longer.

 

These guys start with some theory about aging. Clearly, it’s impractical to conduct an ageing experiment in real time, particularly when the periods involved are measured in millions of years.  But there is a way to accelerate the process of aging.

 

This is based on the idea that data must be stored in an energy minimum that is separated from other minima by an energy barrier. So to corrupt data by converting a 0 to a 1, for example, requires enough energy to overcome this barrier.

 

The probability that the system will jump in this way is governed by an idea known as Arrhenius law. This relates the probability of jumping the barrier to factors such as its temperature, the Boltzmann constant and how often a jump can be attempted, which is related to the level of atomic vibrations.

 

Some straightforward calculations reveal that to last a million years, the required energy barrier is 63 KBT or 70 KBT to last a billion years. “These values are well within the range of today’s technology,” say de Vries and co.

 

The disk is simple in conception. The data is stored in the pattern of lines etched into a thin metal disc and then covered with a protective layer.

The metal in question is tungsten, which they chose because of its high melting temperature (3,422 degrees C) and low thermal expansion coefficient.  The protective layer is silicon nitride (Si3N4) chosen because of its high resistance to fracture and its low thermal expansion coefficient.

 

The results are impressive. According to Arrhenius law, a disk capable of surviving a million years would have to survive 1 hour at 445 Kelvin, a test that the new disks passed with ease. Indeed, they survived temperatures up to 848 Kelvin, albeit with significant amounts of information loss.


Via Dr. Stefan Gruenwald
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Crean biomodelos 3D para mejorar los abordajes médicos

Crean biomodelos 3D para mejorar los abordajes médicos | Editoriales, Analisis, Noticias | Scoop.it
Desarrollan réplicas exactas de la estructura anatómica de bebés con malformaciones para contribuir a su tratamiento.

Via Incubadora UNC
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The Anatomy of an Education-Technology Startup

The Anatomy of an Education-Technology Startup | Editoriales, Analisis, Noticias | Scoop.it
There are 11 companies in the current cohort of Imagine K12, the only startup incubator program specifically for K-12 education technology. But the entrepreneurs that make up those companies come from a wide variety of backgrounds.

Via Costas Vasiliou, LiderazgoEmpresarial
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7 cosas que Internet cambiará en los próximos siete años, según Google

7 cosas que Internet cambiará en los próximos siete años, según Google | Editoriales, Analisis, Noticias | Scoop.it
Javier Rodríguez Zapatero, presidente de Google España, explica cómo Internet cambiará la forma en la que nos comunicaremos y relacionaremos en los años venideros.

Via Santiago Bonet, LiderazgoEmpresarial
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¿De qué se tratan los emprendimientos de base tecnológica? | comercioyjusticia.info

¿De qué se tratan los emprendimientos de base tecnológica? | comercioyjusticia.info | Editoriales, Analisis, Noticias | Scoop.it
En la actualidad se suele utilizar el término startup para referirse a los emprendimientos en su etapa inicial, y especialmente a los de base tecnológica

Via Incubadora UNC
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MyKLogica's curator insight, October 3, 2013 7:04 AM

Muy interesante, sobre todo por los ejemplos de startups españolas, en concreto de Córdoba, que pone.

 

Ahora bien, para que sean sustentables, le sumaría una caraterística, la conciencia de su función social y lo que implica, coherencia de actuación. Si queremos un futuro sostenible, hemos de crear empresas 3.0 que retroalimenten la comunidad o comunidades con las que colabora.

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Six startups join North Shore InnoVentures' technology incubator - Boston.com

Six startups join North Shore InnoVentures' technology incubator
Boston.com
Your article has been sent. By Chris Reidy, Globe Staff.

Via VERONICA LESTER, LiderazgoEmpresarial
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Six startups join North Shore InnoVentures' technology incubator - Boston.com

Six startups join North Shore InnoVentures' technology incubator
Boston.com
Your article has been sent. By Chris Reidy, Globe Staff.

Via VERONICA LESTER
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10 Excellent Video Editing Apps

10 Excellent Video Editing Apps | Editoriales, Analisis, Noticias | Scoop.it

It's usually an expensive endeavor, but thanks to smartphones, you can try your hand at shooting and editing video without the staggering price.


Via Vicente Montiel
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Cinco 'startups' que lo tuvieron todo y se quedaron por el camino - Tecnología - ElConfidencial.com

Cinco 'startups' que lo tuvieron todo y se quedaron por el camino - Tecnología - ElConfidencial.com | Editoriales, Analisis, Noticias | Scoop.it
En algunos casos, la esperada inversión no llegó a tiempo, o sus directivos no pudieron convencer a una compañía de mayor tamaño para la absorción de su incipiente negocio.

Via Santiago Bonet
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La NASA resuelve un enigma de 45 años sobre la gravedad en la Luna

La NASA resuelve un enigma de 45 años sobre la gravedad en la Luna | Editoriales, Analisis, Noticias | Scoop.it
La misión GRAIL de la NASA ha descubierto el origen de las regiones invisibles masivas que hacen que la gravedad de la Luna sea irregular, un fenómeno que afecta a las operaciones de las...

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La NASA muestra como sería la Antártida sin hielo

La NASA muestra como sería la Antártida sin hielo | Editoriales, Analisis, Noticias | Scoop.it
Científicos desarrollaron un mapa basado en la elevación de la superficie, en el grueso del hielo y en la topografía de la tierra, aire y datos satelitales.

Via Ramon Aragon
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