Two US startups are breaking solar efficiency records in their quest to bring clean, cost-effective, eco-friendly energy to a power grid near you. Alta Devices, based in Santa Clara, CA, has achieved a 23.5 percent efficiency rating with its standard solar panel, while Semprius, a Durham, NC company, has achieved a rating of 33.9 percent with its concentrated photovoltaic offering — besting the previous records of 22.9 percent and 33 percent, respectively. Interestingly enough, both outfits chose to utilize a new material to construct their sun-sopping cells: gallium arsenide. The material, while more expensive, is better suited for absorbing the sun’s energy, especially when compared to silicon, the cheaper element typically used. Alta and Semprius are looking to proliferate solar power by further refining the technology, making its price per kilowatt equivalent to that of fossil fuels without the use of government subsides. Here comes the sun…
The fact that more and more companies and people are trying to change the way they do/make their stuff is a sign that the business models of the current years are in serious needs of adaptation/evolution/revolution…
It seems industry analysts aren’t the only ones questioning the traditional game publishing model these days, as Tim Schafer’s Double Fine (Brutal Legend, Costume Quest) has launched a Kickstarter project to crowdsource funding for “a brand-new, downloadable ‘Point-and-Click’ graphic adventure game for the modern age.”
Transparency is generally a property of a material’s density or
crystal structure, and varies depending on the wavelength of
light. However, transparency can also be achieved by exploiting quantum interference between energy level transitions in atoms. Up until now, such transparency has been confined to optical
wavelengths, due to the
typical energies of atomic transitions.
Transitioning between energy levels within atomic nuclei (instead of electron transitions) involves much
higher energies, corresponding to hard X-ray frequencies. Ralf
Röhlsberger, Hans-Christian Wille, Kai
Schlage, and Balaram Sahoo of the Deutsches Elektronen-Synchrotron (DESY) in
Germany have induced transparency in iron-57 nuclei, using an X-ray
laser to drive the nuclei to resonance. The experiment not only made
the iron nuclei nearly vanish, but also slowed the X-ray photons to a
small fraction of their usual speed. This result holds out the
tantalizing possibility of quantum optics in the nuclear regime,
providing us new ways of manipulating light at far higher energies than
have previously been possible.
Xappr and appBlaster are fine weaponizers for your smartphone, provided you don’t care to share your violent tendencies with your friends. Thankfully, Hasbro is bridging the gap between new-school AR shooter and that teenage classic — laser tag. The NERFLazer Tag system is getting an update for 2012 that lets you pair your blaster with an iPhone or iPod touch. The top of the plastic guns now sport a slot for your iDevice which, when loaded with the Lazer Tag app, provides you with an augmented HUD view. While you can play against purely virtual opponents, the real fun is in using to track your battles with fleshy foes. The app will display your gear and power level, and update your progress on a global Lazer Tag leaderboard. As you play, new attacks and gear will be unlocked for you to enhance your gaming experience. The app will even actually show your blasts’ trajectory, letting you see exactly where you shot your former friend. The 2012 edition of Lazer Tag will hit shelves on August 1st with individual blasters costing $40 and sets of two $70. Check out the PR and a screen shot of the app after the break.
Water Flea and Ball A water flea plays with a volvox, a type of green algae. Ralf Wagner/via Nikon
The winners of the Nikon Small World microvideography contestEvery year we’re enthralled by the smallest things among us, as scientists capture stunningly beautiful and bizarre images under the microscope. For the first time, the people who bring us the annual Small World Microphotography Competition have caught the world of the tiny on tape.
Behold award-winning videos of the microscopic world, from the vasculature of a chicken egg to a water flea playing with algae. Like the still version of the competition, the movies were judged on whether they were visually outstanding as well as their ability to depict the intersection of science and art, according to Nikon. Some of the videos are scientific breakthroughs in their own right – we told you about one of the honorable mentions, a live-action video of a monkey cell, when it was first published last spring.
The videos feature Small World perennial favorites like zebrafish brains, fruit fly larvae and Arabidopsis thaliana plants, but seeing these things in motion lends them a whole different perspective. You can actually see the movement of tiny cell factories inside nerve cells in a fish brain, and watch the bulbous growth of a new root emerging from a plant’s primary root. Here is a collection of honorable mentions and the top three winners.
First Place
This video was the first time Oxford-based pathologist Anna Franz used this technique for injecting ink into a chick embryo. She cut a window into an egg to expose the 72-hour-old embryo and injected ink into its artery under a 3-D microscope to visualize the vascular system. “This movie not only demonstrates the power of the heart and the complexity of vasculature of the chick embryo, but also reflects the beauty of nature’s design,” Franz said.
Technique: Reflected light microscopy
Magnification: 10x
Second Place
Dr. Dominic Paquet of the German Centre for Neurodegenerative Diseases captured this time-lapse movie of mitochondria transport in the nerve cells of transgenic zebrafish. The cell membranes are green and the mitochondria are labeled in blue.
Technique: Widefield fluorescence
Magnification: 40x objective
Third Place
Dr. Ralf Wagner, a chemist in Germany, captured this video of a Daphnia, or water flea, playing with a volvox, a type of green algae. He found the specimen in his garden pond, according to Nikon. It doesn’t really reflect deep science so much as an extraordinary view of nature – the daphnia is interacting with its environment, not something you can see up close very often. Wagner said he hopes by reminding viewers how much fun science can be, he might inspire others to take up its study.
Technique: Darkfield
Magnification: 50x
Honorable Mentions
Another 11 videos were awarded honorable mentions, from a bustling ant colony to plant root growth in action.
Ants Marching
Mexican artist Raul Gonzalez captured this time lapse video of individuals in his ant colony at feeding time.
Technique: Time Lapse, Reflected Illumination, Stereomicroscopy
Magnification: 1x
The Maw
James Nicholson of the Coral Collaborative Research Facility in Charleston, S.C., recorded this stony coral. Visible inside the mouth are the mesenteries, structures involved in digestion and reproduction; the unique color pattern about the oral area is the result of tissue pigmentation, a response to an unidentified stressor. Maybe the stress of being under the microscope.
Technique: Epifluorescence with 430 nanometer excitation showing natural fluorescence in live specimen
Magnification: 5x
Hydra viridis
By Charles Krebs, Charles Krebs Photography, Issaquah, Wa.
Technique: Darkfield and DIC
Magnification: From 40X to 600X
Drosophila Blood Circulation
By Dr. Robert Markus, Biological Research Center of the Hungarian Academy of Sciences, Szeged, Hungary
This video captures circulating blood cells in a fruit fly larva (Drosophila melanogaster.
Technique: Fluorescence
Magnification: 50x
Arabidopsis Root Growth
By Daniel von Wangenheim, Goethe Universität Frankfurt
Video of the well-studied plant model Arabidopsis thaliana shows a lateral root growing out of the primary root.
Technique: light sheet-based fluorescence microscopy
Magnification: 20x/0.5 W N-ACHROPLAN
The Rotifer and the Worm
Craig Smith, a photographer in Fresno, Calif., captured two videos that received honorable mentions. The first shows a microscopic aquatic rotifer, with its corona extending and retracting during feeding. The second shows asexual budding in a worm, Aeolosoma Hemprichi, with the new worm attached to the posterior end of the parent.
Technique (both videos): Darkfield
Magnification: 400x
Monkey Cells in Real Time
We told you about this video, a major breakthrough in cellular imaging, when it was first published last spring. Researchers led by Liang Gao at the Howard Hughes Medical Institute used a new technique to capture this image of an African green monkey kidney cell. The video shows the cell membrane ruffling and internal vacuoles inside the living cell.
Technique: Two photon Bessel beam plane illumination microscopy
Magnification: 56x
Desmid dividing
By Dr. Jeremy Pickett-Heaps of the University of Melbourne.
Technique: Time lapse video microscopy
Magnification: Non-dividing cells measure about 170 microns across, Pickett-Heaps notes.
How Do Ellipsoid Eggs Form?
Saori Haigo of the University of California – San Francisco wanted to investigate how ellipsoid eggs, like the types laid by birds and some insects, form during development. Haigo dissected developing eggs out of the ovaries of fruit flies and watched how they behaved outside the body. It turns out that developing eggs spin around the long axis. The green fluorescence highlights the surface of the cells, and the red marks the cell nuclei.
Technique: Live cell imaging; a 3-hour time lapse at five minute intervals
Magnification: 400X
Budded Yeast Under Attack
This video captures amoebas ingesting brewer’s yeast. They are expressing a red fluorescent protein to label actin filaments, and a green protein to label what’s called the phagocytic cup – the method by which the amoeba ingests the yeast cell. We will let author Margaret Clarke of the Oklahoma Medical Research Foundation explain further: A phagocytic cup often pauses at or returns to the concave curvature at the neck of a budded yeast, and actin [a protein] accumulates there in an attempt to seal the cup. An unsuccessful attempt may end in retraction of the cup and release of the particle, or the cell may eventually resume extension of the cup and engulf the entire particle. Those two outcomes are shown here.
Technique: Laser scanning confocal microscopy. A time series was collected in a single focal plane, with images acquired at 4-second intervals.
Magnification: 33 microns x 26 microns
Why spend $400+ on a Geiger Counter when you can build your own for a fraction of the price? This new Geiger Counter Kit, available in the Maker Shed, was featured in MAKE: Volume 29 and is able to detect α(alpha), β(beta) and γ(gamma) radiation using the included GMT-01 tube. The simple to build kit can be soldered together in a few hours and is designed to be reliable and long lasting. When complete, the Geiger counter will output a click and flash an LED each time a radioactive particle is detected. The unit has two digital TTL logic pulse outputs that allow connection to a number of accessory instruments such as a a data logger, Digital Meter, or RS-232 adapter for connection to a PC (none included.)
Features
GMT-01 tube detects α(alpha) β(beta) and γ(gamma) radiation
2 digital outputs
Flashing LED and audio clicker alert you to detected radiation.
It’s about time!! I don’t know why/how this didn’t happen earlier!!
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The new Canon Powershot ELPH 530 HS will be the first Canon camera with built-in Wi-Fi capabilities. That means you’ll be able to wirelessly upload photos to the Internet as well as to transfer media directly to mobile devices. More »
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