Saturday, 25 May 2013

'Fast & Furious 6': The Reviews Are In!

Critics love the film's 'badassness,' but also point out its more emotional themes.
By Todd Gilchrist


Vin Diesel in "Fast & Furious 6"
Photo: Universal Pictures

Source: http://www.mtv.com/news/articles/1707998/fast-and-furious-6-movie-reviews.jhtml

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Tomorrow's Galactic Explorers Could Use Pulsars as Interstellar GPS

Space is so ludicrously vast that keeping a precise fix on our spacecraft?even within the solar system?is really tough. So rather than track them from afar, a team of researchers want spacecraft to govern themselves?using pulsars.

For every astronomical unit (AU) between the Earth and the craft, ground control loses 4km of tracking accuracy. That means we can only guess a satellite's location orbiting around Pluto, about 50 AU, within a radius of 200km. You're not going to catch an asteroid with that level of inaccuracy.

Instead, Werner Becker and his team at the Max Planck Institute for Radio Astronomy have devised a method for spacecraft to triangulate their own positioning in space based on the relative locations of known pulsars?rapidly spinning neutron stars that emit blasts of high energy radiation in precise intervals. By measuring how long it takes for the emissions of at least three pulsars to reach the craft, compared against their predicted values, the spacecraft should be able to determine its location to within 5 km. This is essentially the same method used by cell towers and the global positioning system, but over massive distances.

There are many technical hurdles that must be overcome before this concept is actually feasible. For one, different pulsars emit radiation at different wavelengths, which can only be received by collecting dishes of a specific size. The 21cm waves that Becker's team is investigating would require an array measuring 150 square meters. This of course leads to the problem of designing and packing a sufficiently large?and, more importantly, sufficiently light?dish into the craft and successfully launching it into space.

This technology is still many years away yet but Becker is confident that future generations of astronauts will use the stars themselves as twinkling guide posts.

[Archiv via Tech Review - Image: NASA]

Source: http://gizmodo.com/tomorrows-galactic-explorers-could-use-pulsars-as-inte-509529384

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Friday, 24 May 2013

Tasmania deep in debt: Giddings does a Gillard

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Source: http://blogs.news.com.au/heraldsun/andrewbolt/index.php/heraldsun/comments/tasmania_deep_in_debt_giddings_does_a_gillard/

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Accurate distance measurement resolves major astronomical mystery

May 23, 2013 ? Sometimes astronomy is like real estate -- what's important is location, location, and location. Astronomers have resolved a major problem in their understanding of a class of stars that undergo regular outbursts by accurately measuring the distance to a famous example of the type.

The researchers used the National Science Foundation's Very Long Baseline Array (VLBA) and the European VLBI Network (EVN) to precisely locate one of the most-observed variable-star systems in the sky -- a double-star system called SS Cygni -- at 370 light-years from Earth. This new distance measurement meant that an explanation for the system's regular outbursts that applies to similar pairs also applies to SS Cygni.

"This is one of the best-studied systems of its type, but according to our understanding of how these things work, it should not have been having outbursts. The new distance measurement brings it into line with the standard explanation," said James Miller-Jones, of the Curtin University node of the International Centre for Radio Astronomy Research in Perth, Australia.

SS Cygni, in the constellation Cygnus the Swan, is a dense white dwarf star in a close orbit with a less-massive red dwarf. The strong gravity of the white dwarf pulls material from its companion into a swirling disk surrounding the white dwarf. The two stars orbit each other in only about 6.6 hours. On an average of once every 49 days, a powerful outburst greatly brightens the system.

This type of system is called a dwarf nova, and, based on other examples, scientists proposed that the outbursts result from changes in the rate at which matter moves through the disk onto the white dwarf. At high rates of mass transfer from the red dwarf, the rotating disk remains stable, but when the rate is lower, the disk can become unstable and undergo an outburst.

This mechanism seemed to work for all known dwarf novae except for SS Cygni, based on previous distance estimates. Hubble Space Telescope measurements in 1999 and 2004 put SS Cygni at a distance of about 520 light-years.

"That was a problem. At that distance, SS Cygni would have been the brightest dwarf nova in the sky, and should have had enough mass moving through its disk to remain stable without any outbursts," Miller-Jones said.

The closer distance measured with the radio telescopes means that the system is intrinsically less bright, and now fits the characteristics outlined in the standard explanation for dwarf-nova outbursts, the scientists said.

The astronomers made the new distance measurement using the VLBA and EVN, both of which use widely-separated radio telescopes that work together as a single, extremely precise, telescope. These systems are capable of the most accurate measurements of positions in the sky available in astronomy.

By observing SS Cygni when Earth is on opposite sides of its orbit around the Sun, astronomers can measure the subtle shift in the object's apparent position in the sky, compared to the background of more-distant objects. This effect, called parallax, allows scientists to directly measure an object's distance by applying simple, high-school trigonometry.

The astronomers knew that SS Cygni emits radio waves during its outbursts, so they made their radio-telescope observations after receiving reports from amateur astronomers that an outburst was underway. They observed the object during outbursts from 2010 to 2012.

The difference in the distance measurements between the Hubble visible-light and the radio observations may have several causes, the scientists said. The radio observations were made against a background of objects far beyond our own Milky Way Galaxy, while the Hubble observations used stars within our Galaxy as reference points. The more-distant objects provide a better, more stable, reference, the astronomers pointed out. The radio observations, they added, are immune to other possible sources of error as well.

Discovered in 1896, SS Cygni is a popular object for amateur astronomers. According to the American Association of Variable Star Observers, not a single outburst of SS Cygni has been missed since its discovery. It has been observed nearly half a million times, and its brightness variations carefully tracked, making it one of the most intensely studied astronomical objects of the past century.

Miller Jones worked with Gregory Sivakoff of the University of Alberta and the University of Virginia, Christian Knigge of the University of Southhampton in the UK, Elmar Kording or Radboud University Nijmegen in the Netherlands, and Matthew Templeton and Elizabeth Waagen of the American Association of Variable Star Observers, headquartered in Cambridge, Mass. The researchers published their findings in the journal Science.

The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_technology/~3/IKqltBjVd9Y/130523143006.htm

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Piercing unpopular in Japan

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Research Panel recently did a Day Research quick survey on piercings; 147,357 people responded to the question.

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14.7% said they had one (there was no investigation into what part of the body, but the answer includes conventional ear lobe piercing), 9.7% used to have one, 8.9% didn?t have one but were interested in getting one, and 66.7% had no interest at all.

By way of comparison, according to this data, 14% of Americans and 10% of British people have piercing in places other than their earlobes, but their figures on 83% of Americans having piercings and 72% of them being women would mean that at least 60% of Americans are female, which obviously indicates an error somewhere!

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Source: http://feedproxy.google.com/~r/WhatJapanThinks/~3/2DfMFRgemYQ/

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Gutenberg Research Award 2013 for quantum physicist Maciej Lewenstein

Gutenberg Research Award 2013 for quantum physicist Maciej Lewenstein [ Back to EurekAlert! ] Public release date: 23-May-2013
[ | E-mail | Share Share ]

Contact: Matthias Neubert
matthias.neubert@uni-mainz.de
Johannes Gutenberg Universitaet Mainz

Gutenberg Research College honors quantum physicist with many-faceted research interests active throughout Europe

He has produced ground-breaking work in various research fields of theoretical physics, where he was able to creatively combine vastly different areas with one another. "We are pleased to welcome a European scientist of international stature here in Mainz," said Professor Dr. Matthias Neubert, Director of the GRC and head of the Theoretical High-Energy Physics group at JGU. The Gutenberg Research Award 2013 was presented during a ceremony held at JGU on Monday, May 13.

Maciej Lewenstein, born in 1955, studied at the University of Warsaw and earned his doctorate at the University of Essen. He was a member of the Centre for Theoretical Physics at the Polish Academy of Sciences. From 1995, he worked for the Commissariat l'nergie Atomique (CEA) in Saclay, France, subsequently moving to the University of Hanover in 1998. As ICREA Professor, he has been in charge of the Quantum Optics Theory group at the Institute of Photonic Sciences since 2005.

Professor Lewenstein's research interests range from traditional quantum optics, through physics of cold gases and quantum information to physics of ultra-intense laser fields. His extraordinary ability to combine diverse fields has made him produce very original and highly influential results. He is a fellow of the American Physical Society (APS) and a member of the European Academy of Sciences. In 2007, he received a Humboldt Research Award; in 2008, he was awarded an ERC Advanced Grant, the most generous grant the EU awards to individual researchers.

In the scientific community, he is best-known for his contributions in high-order harmonics generation when matter is exposed to extreme laser field strengths. His articles on Bose-Einstein condensates or degenerate ultra-cold fermionic atoms are read and cited widely. His proposals in quantum computing are nowadays realized experimentally. In total, his works have been cited more than 19.000 times - an enormous number which is rapidly increasing.

Although his research already encompasses a wide range of issues in quantum physics and the neighboring sciences, he still paves direction to new research fields where he contributes with his expertise and creativity. For instance, he has developed novel ideas for quantum simulation and its application both in the description of entanglement and many-body systems, relevant for condensed matter physics and also for hard problems in high energy physics.

It is the aim of the Gutenberg Research College and JGU to encourage collaboration in the field of quantum simulation, a highly topical research area, while it is also hoped that it will provide impetus to work in solid state physics, which has traditionally been one of Mainz's core strengths. In addition, Professor Maciej Lewenstein is opening up new options for using quantum simulation in order to investigate problems in high-energy physics. This will help forge a link with another key player in physics at Mainz, the Cluster of Excellence PRISMA, which is studying fundamental interactions.

###

Further information:

Professor Dr. Matthias Neubert
Director of the Gutenberg Research College (GRC)
Johannes Gutenberg University Mainz (JGU)
D 55099 Mainz, GERMANY
phone +49 6131 39-23681
fax +49 6131 39-24611

Related links:

http://www.icfo.eu/ (Institute for Photonic Sciences, Barcelona)

http://www.icfo.eu/research/people_ficha.php?id_group=23&people_id=25 (Maciej Lewenstein)


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Gutenberg Research Award 2013 for quantum physicist Maciej Lewenstein [ Back to EurekAlert! ] Public release date: 23-May-2013
[ | E-mail | Share Share ]

Contact: Matthias Neubert
matthias.neubert@uni-mainz.de
Johannes Gutenberg Universitaet Mainz

Gutenberg Research College honors quantum physicist with many-faceted research interests active throughout Europe

He has produced ground-breaking work in various research fields of theoretical physics, where he was able to creatively combine vastly different areas with one another. "We are pleased to welcome a European scientist of international stature here in Mainz," said Professor Dr. Matthias Neubert, Director of the GRC and head of the Theoretical High-Energy Physics group at JGU. The Gutenberg Research Award 2013 was presented during a ceremony held at JGU on Monday, May 13.

Maciej Lewenstein, born in 1955, studied at the University of Warsaw and earned his doctorate at the University of Essen. He was a member of the Centre for Theoretical Physics at the Polish Academy of Sciences. From 1995, he worked for the Commissariat l'nergie Atomique (CEA) in Saclay, France, subsequently moving to the University of Hanover in 1998. As ICREA Professor, he has been in charge of the Quantum Optics Theory group at the Institute of Photonic Sciences since 2005.

Professor Lewenstein's research interests range from traditional quantum optics, through physics of cold gases and quantum information to physics of ultra-intense laser fields. His extraordinary ability to combine diverse fields has made him produce very original and highly influential results. He is a fellow of the American Physical Society (APS) and a member of the European Academy of Sciences. In 2007, he received a Humboldt Research Award; in 2008, he was awarded an ERC Advanced Grant, the most generous grant the EU awards to individual researchers.

In the scientific community, he is best-known for his contributions in high-order harmonics generation when matter is exposed to extreme laser field strengths. His articles on Bose-Einstein condensates or degenerate ultra-cold fermionic atoms are read and cited widely. His proposals in quantum computing are nowadays realized experimentally. In total, his works have been cited more than 19.000 times - an enormous number which is rapidly increasing.

Although his research already encompasses a wide range of issues in quantum physics and the neighboring sciences, he still paves direction to new research fields where he contributes with his expertise and creativity. For instance, he has developed novel ideas for quantum simulation and its application both in the description of entanglement and many-body systems, relevant for condensed matter physics and also for hard problems in high energy physics.

It is the aim of the Gutenberg Research College and JGU to encourage collaboration in the field of quantum simulation, a highly topical research area, while it is also hoped that it will provide impetus to work in solid state physics, which has traditionally been one of Mainz's core strengths. In addition, Professor Maciej Lewenstein is opening up new options for using quantum simulation in order to investigate problems in high-energy physics. This will help forge a link with another key player in physics at Mainz, the Cluster of Excellence PRISMA, which is studying fundamental interactions.

###

Further information:

Professor Dr. Matthias Neubert
Director of the Gutenberg Research College (GRC)
Johannes Gutenberg University Mainz (JGU)
D 55099 Mainz, GERMANY
phone +49 6131 39-23681
fax +49 6131 39-24611

Related links:

http://www.icfo.eu/ (Institute for Photonic Sciences, Barcelona)

http://www.icfo.eu/research/people_ficha.php?id_group=23&people_id=25 (Maciej Lewenstein)


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Source: http://www.eurekalert.org/pub_releases/2013-05/jgum-gra052313.php

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Epson PowerLite Home Cinema 5020UBe


From a casual comparison, the Epson PowerLite Home Cinema 5020UBe doesn't seem very different from the Editors' Choice Epson PowerLite Home Cinema 5010e, 4 stars) that it's replaced in Epson's line (although you can still find it online at this writing). Delve a little deeper, though, and you'll find any number of small improvements, with features like frame interpolation (more on that later) working just a little better than they did with the 5010e. Add up all the small differences, and you wind up with a significant improvement to an already impressive projector. That's easily enough to make the 5020UBe an Editors' Choice as well.

Another obvious point of comparison for the 5020UBe is the Editors' Choice Epson PowerLite Home Cinema 3020e that I recently reviewed. One step down in Epson's line, the 3020e offers fewer advanced features, like the 5020UBe's lens shift, which lets you move the image position without moving the projector. However, it shares a similar design. Most notably, both offer native 1080p resolution for 2D and 3D, and both are built around an LCD engine.

One other key similarity is that each is one of two essentially identical models. According to Epson, the only difference between the 5020UBe and the Epson PowerLite Home Cinema 5020UB ($2,599 street) is that the Epson 5020UB doesn't support WirelessHD. It also doesn't come with a separate WirelessHD transmitter, which lets you connect to as many as five HDMI video sources without having to string any cables to the projector. That means most comments in this review apply to both models. It also means that if you don't plan to take advantage of the WirelessHD, you can save some money by getting the Epson 5020UB.

Setup
Setting up the 5020UBe is easier that with most projectors, thanks in large part to the conveniently large zoom and lens shift. With the 2.1x zoom, you have far more flexibility than with most projectors in how far you can put the projector from the screen for a given size image.

Similarly, the vertical and horizontal lens shift, which lets you move the image without moving the projector, gives you lots of flexibility in both horizontal and vertical placement relative to the screen. I measured the horizontal lens shift at not quite a half-screen width in either direction from the center position and the vertical lens shift at just short of a full screen up or down from the center position.

Most of the connection choices are standard fare, with two HDMI connectors plus VGA, component, and composite video ports. If you take advantage of WirelessHD, however, you can connect from up to a claimed 32 feet away without wires. Simply connect one to five video sources to the WirelessHD transmitter by HDMI cable, set the projector to WirelessHD, and wait a moment while the transmitter and projector establish a connection.

If you put the projector in a large room, one other potential setup step is that you may want to add Epson's optional external 3D emitter ($79 direct) to ensure that the RF 3D glasses stay in sync with the projector. In my tests, however, the glasses worked without problems with the built-in emitter.

Image Brightness
With its 2,400-lumen rating, the 5020UBe is potentially too bright for theater dark-lighting with typical home theater screen sizes. As a point of reference, using SMPTE (The Society of Motion Picture and Television Engineers) recommendations, 2,400 lumens would be appropriate for roughly a 225-inch diagonal, 1.0 gain screen in theater-dark lighting.

Fortunately, one of the 5020UBe's strong points is that it offers a wide range of brightness. Switch the lamp to Eco mode, choose one of the less bright presets, and the brightness is more appropriate for a roughly 120-inch, 1.0 gain screen in theater dark lighting. For still smaller screen sizes, if the room is large enough, you can move the projector further from the screen, and set the zoom to its full telephoto setting, to clamp down the brightness even more.

Very much on the plus side, the brighter settings on the projector make it suitable for using in a family room or living room. The full 2,400 lumens would be appropriate for roughly a 125-inch screen with moderate ambient light, or a somewhat smaller screen size with sunlight streaming through the windows.

2D Image Quality
The 5020UBe's 2D image quality is nothing short of excellent. Color quality is good to excellent straight out of the box without tweaking, although there are plenty of settings to tweak if you care to, and contrast is excellent, with deeply dark black levels aided by an auto-iris to help make dark scenes darker. The projector also did well on color balance, with suitably neutral grays at all levels from black to white, and it did an excellent job with shadow detail (details based on shading in dark areas). It also helps a lot that because it's an LCD projector, it can't show rainbow artifacts the way DLP projectors can, with light areas breaking up into little red-green-blue rainbows.

The menus offer a number of sophisticated video processing options that you'll want to experiment with and adjust to taste. Epson's Super-resolution, for example, with five settings, improves apparent resolution just a bit, particularly with DVDs, but I also noticed some minor artifacts added at the highest setting.

Also demanding mention is frame interpolation, with three settings. As with similar features on other projectors, frame interpolation smoothes out the judder inherent in 24 frame-per-second (fps) filmed content, but it makes the image look more like live video than film, an issue known as the digital video effect.

This is essentially the same issue that some people complained about in the 48 fps version of The Hobbit. It's not that the image looks worse; it's just not the look you associate with movies. If you find the look bothersome, you can compromise with the low setting or turn the feature off entirely. On the other hand, you may find that even if you don't like it for watching movies, it still improves the look of live or recorded content.

3D and Other Issues
The 5020UBe comes with two pairs of 3D glasses, with additional glasses available for $99 (direct) each. As you would expect, the projector offers full support for HDMI 1.4a, which means you can connect to a Blu-ray player, cable TV box, or equivalent source directly, including connecting by WirelessHD, to watch in 3D.

I tested the projector with both a Blu-ray player and a FIOS box, with the 3D working without problems in both cases. With FIOS, however, I had to manually change 3D Mode settings in the projector, as well as switch between 2D and 3D mode, both to watch in 3D and to switch back to watching in 2D.

Brightness necessarily drops with 3D, because each lens in the glasses is open only half the time, and even when it's open the lens cuts out some of the light. However, the 5020UBe's 3D modes are bright enough to let you use a reasonably large image, even when it has to stand up to the ambient light in a family room.

The 3D image quality is good to excellent. The projector offers essentially the same strengths as for 2D images, including good color quality, and also handles 3D-specific issues well. In particular, I didn't see any crosstalk or 3D-related motion artifacts, even in clips that tend to bring those problems out.

One last issue that demands mention is the lack of an audio system. This is typical for a home theater projector, on the assumption that if you're paying this much for a projector, you'll want to install a far better audio system than you can cram into a projector case. However, it's important to keep in mind that you will need a separate audio system as part of your budget.

The Epson PowerLite Home Cinema 5020UBe is an impressive projector for the price. It delivers a high-quality image for both 2D and 3D, a wide range of brightness settings, and a long list of advanced features, including an unusually large zoom and lens shift, an auto-iris, frame interpolation, Super-resolution, and more. Taken together, this constellation of features makes it a highly capable home theater projector for 2D and 3D and Editors' Choice in its price range as well.

Source: http://feedproxy.google.com/~r/ziffdavis/pcmag/~3/pBcXrz4OIfk/0,2817,2419181,00.asp

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