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Nov 5, 2016
DARPA Aims to Create Armies of ‘Insect Allies’ to Protect Crops Worldwide
Posted by Karen Hurst in categories: biotech/medical, food
A new DARPA program is poised to provide an alternative to traditional agricultural threat response, using targeted gene therapy to protect mature plants within a single growing season.
DARPA proposes to use a natural and very efficient two-step delivery system to transfer modified genes to plants; insect vectors and the plant viruses they transmit.
In the process, DARPA aims to transform certain insect pests into “Insect Allies,” the name of the new program.
Continue reading “DARPA Aims to Create Armies of ‘Insect Allies’ to Protect Crops Worldwide” »
Nov 5, 2016
I-Team: Nuclear reactor test in Nevada could make a Mars trip reality
Posted by Klaus Baldauf in categories: nuclear energy, space
This story may sound like the plot of a science-fiction movie.
Next year, a team of top scientists will hunker down inside a classified facility in the Nevada desert so they can experiment with a piece of advanced technology.
The test will focus on a small nuclear reactor and if it works as planned, it could be a huge step toward putting humans on Mars.
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Nov 5, 2016
Co-discover of Metallic Hydrogen wrote paper on metallic hydrogen for rockets
Posted by Klaus Baldauf in categories: particle physics, space travel
On October 5th 2016, Ranga Dias and Isaac F. Silvera of Lyman Laboratory of Physics, Harvard University released the first experimental evidence that solid metallic hydrogen has been synthesized in the laboratory.
It took 495 GPa pressure to create. The sample is being held in the cryostat in liquid nitrogen.
Atomic metallic hydrogen, if metastable at ambient pressure and temperature could be used as the most powerful chemical rocket fuel, as the atoms recombine to form molecular hydrogen. This light-weight high-energy density material would revolutionize rocketry, allowing single-stage rockets to enter orbit and chemically fueled rockets to explore our solar system. To transform solid molecular hydrogen to metallic hydrogen requires extreme high pressures.
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Nov 5, 2016
Israel Proves the Desalination Era Is Here
Posted by Shailesh Prasad in category: sustainability
Nov 5, 2016
Technique reveals the basis for machine-learning systems’ decisions
Posted by Shailesh Prasad in category: robotics/AI
In recent years, the best-performing systems in artificial-intelligence research have come courtesy of neural networks, which look for patterns in training data that yield useful predictions or classifications. A neural net might, for instance, be trained to recognize certain objects in digital images or to infer the topics of texts.
But neural nets are black boxes. After training, a network may be very good at classifying data, but even its creators will have no idea why. With visual data, it’s sometimes possible to automate experiments that determine which visual features a neural net is responding to. But text-processing systems tend to be more opaque.
At the Association for Computational Linguistics’ Conference on Empirical Methods in Natural Language Processing, researchers from MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) will present a new way to train neural networks so that they provide not only predictions and classifications but rationales for their decisions.
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Nov 5, 2016
This New Hypothesis Claims to Solve 5 of the Biggest Problems in Physics
Posted by Shailesh Prasad in categories: cosmology, particle physics
Physicists have come up with a new model that they say solves five of the biggest unanswered questions in modern physics, explaining the weirdness of dark matter, neutrino oscillations, baryogenesis, cosmic inflation, and the strong CP problem all at once.
The new model, called SMASH, proposes that we only need six new particles to reconcile all of these gaps in the standard model of physics, and the team behind it says it won’t be that hard to test.
The model has been developed by a team of French and German physicists, and they say it doesn’t require any major tweaks to the standard model — just a few new additions.
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Nov 5, 2016
Researchers uncover the origin of atmospheric particles
Posted by Shailesh Prasad in categories: computing, particle physics
In a study led by the University of Leeds, scientists have solved one of the most challenging and long-standing problems in atmospheric science: to understand how particles are formed in the atmosphere.
The research paper, published online today in the journal Science, details the first computer simulation of atmospheric particle formation that is based entirely on experimental data. The research was made possible thanks to a sophisticated laboratory called CLOUD, based within the research facility CERN in Switzerland.
The lead scientist on the study, Professor Ken Carslaw from the School of Earth and Environment at the University of Leeds said: “This is a major milestone in our understanding of the atmosphere. The CERN experiment is unique, and it has produced data that seemed completely out of reach just five years ago.”
Nov 5, 2016
Curiosity Has Spotted a Weird Metallic Meteorite on Mars
Posted by Shailesh Prasad in category: space
NASA’s Curiosity rover stumbled across a peculiar-looking metallic meteorite last week, while climbing the slopes of Mars’ Mount Sharp.
Meteorites are pretty common on the Red Planet due to its thin atmosphere and proximity to the asteroid belt. But this little meteorite is unusually smooth — almost like someone’s buffed it.
It also has several deep grooves, which suggests that it might have been molten at some point in time.
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Nov 5, 2016
Researchers develop a system for adaptive live imaging of large living organisms
Posted by Shailesh Prasad in categories: biological, genetics, robotics/AI
Light-sheet microscopy is one of the most powerful method for imaging the development and function of whole living organisms. However, achieving high-resolution images with these microscopes requires manual adjustments during imaging. Researchers of the Max Planck Institute of Molecular Cell Biology and Genetics in Dresden together with colleagues at Janelia Research Campus (HHMI) have developed a new kind of light-sheet microscope that can ‘drive’ itself automatically by adapting to the challenging and dynamic optical conditions of large living specimens. This new smart microscope combines a novel hardware design and a smart ‘AutoPilot’ system that can analyze images and automatically adjust and optimize the microscope. This framework enables for the first time long-term adaptive imaging of entire developing embryos and improves the resolution of light-sheet microscopes up to five-fold.
Light sheet microscopy is a novel microscopy technique developed in the last ten years that is uniquely suited to image large living organisms. In a light-sheet microscope, a laser light sheet illuminates the sample perpendicularly to the observation along a thin plane within the sample. Out-of-focus and scattered light from other planes—which often impair image quality—is largely avoided because only the observed plane is illuminated.
The long-standing goal of microscopy is to achieve ever-sharper images deep inside of living samples. For light-sheet microscopes this requires to perfectly maintain the careful alignments between imaging and light-sheet illumination planes. Mismatches between these planes arise from the optical variability of living tissues across different locations and over time. Tackling this challenge is essential to acquire the high-resolution images necessary to decipher the biology behind organism development and morphogenesis. “So far, researchers had to sit at their microscope and tweak things manually—our system puts an end to this: it is like a self-driving car: it functions autonomously”, says Loïc Royer, first author of the study. This smart autonomous microscope can in real-time analyze and optimize the spatial relationship between light-sheets and detection planes across the specimen volume.
