Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Thursday, February 16, 2012

World Economic Forum lists top 10 emerging technologies for 2012



Our goal here is to cover innovation and emerging technologies in all fields of human endeavor, and while almost all of the ideas that grace our pages have the potential to enhance some of our lives in one way or another, at the core are those technologies that will have profound implications for everyone on the planet. For those looking to shape political, business, and academic agendas, predicting how and when these types of technologies will effect us all is critical. Recognizing this, the World Economic Forum's (WEF's) Global Agenda Council on Emerging Technologies has compiled a list of the top 10 emerging technologies it believes will have the greatest impact on the state of the world in 2012.
Betting on the right technologies can allow schools to produce graduates better qualified to deal with a rapidly changing world, governments to more efficiently meet the needs of the populace, business to generate profits, and scientists to better allocate resources.
The list draws on some of the brainpower residing within the entire GAC Network, covering the top ten technological trends that the Global Agenda Council on Emerging Technologies believes will have the biggest social, economic and environmental impacts this year.
Here's the list as presented on the World Economic Forum Blog in order from lowest to highest in terms of the potential to provide solutions to global challenges.
  • 1. Informatics for adding value to information
  • The quantity of information now available to individuals and organizations is unprecedented in human history, and the rate of information generation continues to grow exponentially. Yet, the sheer volume of information is in danger of creating more noise than value, and as a result limiting its effective use. Innovations in how information is organized, mined and processed hold the key to filtering out the noise and using the growing wealth of global information to address emerging challenges.
  • 2. Synthetic biology and metabolic engineering
  • The natural world is a testament to the vast potential inherent in the genetic code at the core of all living organisms. Rapid advances insynthetic biology and metabolic engineering are allowing biologists and engineers to tap into this potential in unprecedented ways, enabling the development of new biological processes and organisms that are designed to serve specific purposes - whether converting biomass to chemicals, fuels and materials, producing new therapeutic drugs or protecting the body against harm.
  • 3. Green Revolution 2.0 - technologies for increased food and biomass
  • Artificial fertilizers are one of the main achievements of modern chemistry, enabling unprecedented increases in crop production yield. Yet, the growing global demand for healthy and nutritious food is threatening to outstrip energy, water and land resources. By integrating advances across the biological and physical sciences, the new green revolution holds the promise of further increasing crop production yields, minimizing environmental impact, reducing energy and water dependence, and decreasing the carbon footprint.
  • 4. Nanoscale design of materials
  • The increasing demand on natural resources requires unprecedented gains in efficiency. Nanostructured materials with tailored properties, designed and engineered at the molecular scale, are already showing novel and unique features that will usher in the next clean energy revolution, reduce our dependence on depleting natural resources, and increase atom-efficiency manufacturing and processing.
  • 5. Systems biology and computational modelling/simulation of chemical and biological systems
  • For improved healthcare and bio-based manufacturing, it is essential to understand how biology and chemistry work together. Systems biology and computational modeling and simulation are playing increasingly important roles in designing therapeutics, materials and processes that are highly efficient in achieving their design goals, while minimally impacting on human health and the environment.
  • 6. Utilization of carbon dioxide as a resource
  • Carbon is at the heart of all life on earth. Yet, managing carbon dioxide releases is one of the greatest social, political and economic challenges of our time. An emerging innovative approach to carbon dioxide management involves transforming it from a liability to a resource. Novel catalysts, based on nanostructured materials, can potentially transform carbon dioxide to high value hydrocarbons and other carbon-containing molecules, which could be used as new building blocks for the chemical industry as cleaner and more sustainable alternatives to petrochemicals.
  • 7. Wireless power
  • Society is deeply reliant on electrically powered devices. Yet, a significant limitation in their continued development and utility is the need to be attached to the electricity grid by wire - either permanently or through frequent battery recharging. Emerging approaches towireless power transmission will free electrical devices from having to be physically plugged in, and are poised to have as significant an impact on personal electronics as Wi-Fi had on Internet use.
  • 8. High energy density power systems
  • Better batteries are essential if the next generation of clean energy technologies are to be realized. A number of emerging technologies are coming together to lay the foundation for advanced electrical energy storage and use, including the development of nanostructured electrodes, solid electrolysis and rapid-power delivery from novelsupercapacitors based on carbon-based nanomaterials. These technologies will provide the energy density and power needed to supercharge the next generation of clean energy technologies.
  • 9. Personalized medicine, nutrition and disease prevention
  • As the global population exceeds 7 billion people - all hoping for a long and healthy life - conventional approaches to ensuring good health are becoming less and less tenable, spurred on by growing demands, dwindling resources and increasing costs. Advances in areas such as genomics, proteomics and metabolomics are now opening up the possibility of tailoring medicine, nutrition and disease prevention to the individual. Together with emerging technologies like synthetic biology and nanotechnology, they are laying the foundation for a revolution in healthcare and well-being that will be less resource intensive and more targeted to individual needs.
  • 10. Enhanced education technology
  • New approaches are needed to meet the challenge of educating a growing young population and providing the skills that are essential to the knowledge economy. This is especially the case in today's rapidly evolving and hyperconnected globalized society. PersonalizedIT-based approaches to education are emerging that allow learner-centerd education, critical thinking development and creativity. Rapid developments in social media, open courseware and ubiquitous access to the Internet are facilitating outside classroom and continuous education.
We know there's nothing like a list of predictions to provoke some healthy debate, so let us know what you think of the GAC on Emerging Technologies' effort in the comments. Is there anything you think they've overlooked, or maybe something they've included that shouldn't be there?

Friday, December 23, 2011

"Shadow state" discovery could dramatically boost solar power efficiency



Researchers at the University of Texas say it is possible to hike the energy yield of solar cells by exploiting what they call a photon's "shadow state", doubling the number of electrons that may be harvested in the process. They claim the discovery could up the theoretical maximum efficiency of silicon solar cells from 31 to 44 percent.
Prior research led by chemist Xiaoyang Zhu demonstrated that a theoretical increase in efficiency to as high as 66 percent would be possible if solar cells could be made to additionally harvest so-called "hot electrons", residual heat energy that is lost within about a picosecond after a cell absorbs a photon. Zhu then found that this was possible, but only when harvesting photons from "highly focused" sunlight, impractical in real-world applications.
But the team's latest findings point to an alternative means of boosting efficiency. The organic plastic semiconductor pentacene, when absorbing a photon, creates an exciton (an electron paired with an electron hole) which is quantum mechanically coupled to a dark "shadow state" multiexciton from which an additional electron can be harvested. This way, a photon provides double the electrons. Zhu says that the process could see solar cell efficiency increase to 44 percent without the need for a focused solar beam.
"Plastic semiconductor solar cell production has great advantages, one of which is low cost," said Zhu. "Combined with the vast capabilities for molecular design and synthesis, our discovery opens the door to an exciting new approach for solar energy conversion, leading to much higher efficiencies."
The latest University of Texas findings were published on December 16 inScience.

Monday, October 10, 2011

First comet found with ocean-like water



A recent discovery may add support to the theory that the water on Earth was brought by a rain of comets. Scientists have analyzed the comet Hartley 2, and discovered that ice found on it has the same composition as ocean water. The discovery was made utilizing an orbiting telescope on the Herschel Space Observatory, which can observe organic molecules by reading their far-infrared wavelengths.



"At the time of the Solar System formation there may have been a large reservoir of such comets with the correct ratio that bombarded the earth," says Paul Hartogh of the Max Planck Institute for Solar System Research in Katlenburg-Lindau, Germany.
"Life would not exist on Earth without liquid water, and so the questions of how and when the oceans got here is a fundamental one," added University of Michigan astronomy professor Ted Bergin, "It's a big puzzle and these new findings are an important piece." Bergin is a co-investigator on HiFi, the Heterodyne Instrument for the Infrared on the Hershel Space Observatory.

Hartley 2 comes from the Kuiper Belt, a zone that is found near Pluto at the edge of the solar system, where there are many more comets which we know little about. The source of Earth's water has been disputed for a long time, with previous theories believing that asteroids where the original water carriers. However, this new discovery strengthens the theory that the water present on Earth was most likely transported by comets from the Kuiper Belt.
"The results show that the amount of material out there that could have contributed to Earth's oceans is perhaps larger than we thought," Bergin said.