Discount Designer Watches: 2013

Tuesday, December 31, 2013

Major reductions in seafloor marine life from climate change by 2100

An international team of scientists predict seafloor dwelling marine life will decline by up to 38 per cent in the North Atlantic and over five per cent globally over the next century. These changes will be driven by a reduction in the plants and animals that live at the surface of the oceans that feed deep-sea communities. As a result, ecosystem services such as fishing will be threatened.

In the study, led by the National Oceanography Centre, the team used the latest suite of climate models to predict changes in food supply throughout the world oceans. They then applied a relationship between food supply and biomass calculated from a huge global database of marine life.

The results of the study are published this week in the scientific journal Global Change Biology.

These changes in seafloor communities are expected despite living on average four kilometres under the surface of the ocean. This is because their food source, the remains of surface ocean marine life that sink to the seafloor, will dwindle because of a decline in nutrient availability. Nutrient supplies will suffer because of climate impacts such as a slowing of the global ocean circulation, as well as increased separation between water masses -- known as 'stratification' -- as a result of warmer and rainier weather.

Lead author Dr Daniel Jones says: "There has been some speculation about climate change impacts on the seafloor, but we wanted to try and make numerical projections for these changes and estimate specifically where they would occur.

"We were expecting some negative changes around the world, but the extent of changes, particularly in the North Atlantic, were staggering. Globally we are talking about losses of marine life weighing more than every person on the planet put together."

The projected changes in marine life are not consistent across the world, but most areas will experience negative change. Over 80 per cent of all identified key habitats -- such as cold-water coral reefs, seamounts and canyons -- will suffer losses in total biomass. The analysis also predicts that animals will get smaller. Smaller animals tend to use energy less efficiently, thereby impacting seabed fisheries and exacerbating the effects of the overall declines in available food.

The study was funded by the Natural Environment Research Council (NERC) as part of the Marine Environmental Mapping Programme (MAREMAP), and involved researchers from the National Oceanography Centre, the Memorial University of Newfoundland, Canada, the University of Tasmania, and the Laboratoire des Sciences du Climat et de l'Environnement, France.

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How emotions are mapped in the body

Dec. 31, 2013 — Researchers found that the most common emotions trigger strong bodily sensations, and the bodily maps of these sensations were topographically different for different emotions. The sensation patterns were, however, consistent across different West European and East Asian cultures, highlighting that emotions and their corresponding bodily sensation patterns have a biological basis.

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"Emotions adjust not only our mental, but also our bodily states. This way the prepare us to react swiftly to the dangers, but also to the opportunities such as pleasurable social interactions present in the environment. Awareness of the corresponding bodily changes may subsequently trigger the conscious emotional sensations, such as the feeling of happiness," tells assistant professor Lauri Nummenmaa from Aalto University.

"The findings have major implications for our understanding of the functions of emotions and their bodily basis. On the other hand, the results help us to understand different emotional disorders and provide novel tools for their diagnosis."

The research was carried out on line, and over 700 individuals from Finland, Sweden and Taiwan took part in the study. The researchers induced different emotional states in their Finnish and Taiwanese participants. Subsequently the participants were shown with pictures of human bodies on a computer, and asked to colour the bodily regions whose activity they felt increasing or decreasing.

The research was funded by European Research Council (ERC), The Academy of Finland and the Aalto University (aivoAALTO project)

The results were published on 31 December, 2013 in the scientific journal Proceedings of The National Academy of Sciences.

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Vitamin E may delay decline in mild-to-moderate Alzheimers disease

Dec. 31, 2013 — Difficulty with activities of daily living often affect Alzheimer's patients, which is estimated to affect as many as 5.1 million Americans. These issues are among the most taxing burdens of the disease for caregivers, which total about 5.4 million family members and friends. New research from the faculty of Icahn School of Medicine at Mount Sinai working with Veterans Administration Medical Centers suggests that alpha tocepherol, fat-soluble Vitamin E and antioxidant, may slow functional decline (problems with daily activities such as shopping, preparing meals, planning, and traveling) in patients with mild-to-moderate Alzheimer's disease and decrease caregiver burden. There was no added benefit for memory and cognitive testing with the vitamin.

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The study is published online first in the Jan. 1 Journal of the American Medical Association.

"Since the cholinesterase inhibitors [galantamine, donepezil, rivastigmine], we have had very little to offer patients with mild-to-moderate dementia," said Mary Sano, PhD, trial co-investigator, and professor in the department of psychiatry, Icahn School of Medicine at Mount Sinai, and director of research at the James J. Peters Veteran's Administration Medical Center, Bronx, New York. "This trial showed that vitamin E delays progression of functional decline by 19% per year, which translates into 6.2 months benefit over placebo."

The finding is valuable because vitamin E is easy to purchase at local drugstores and it is also inexpensive. The clinical trial investigators believe it can be recommended as a treatment strategy, based on the double-blind randomized controlled trial.

The Veteran's Administration Cooperative Randomized Trial of Vitamin E and memantine in Alzheimer's Disease (TEAM-AD examined the effects of vitamin E 2,000 IU/d, 20 mg/d of memantine, the combination, or placebo on Alzheimer's Disease Cooperative Study/Activities of Daily Living (ADCS-ADL) Inventory Score. Cognitive, neuropsychiatric, functional, and caregiver measures were secondary outcomes. A group of 613 patients with mild to moderate Alzheimer's disease were in the study, which was launched in August 2007 and finished in September 2012 at 14 Veterans Affairs Medical Centers.

Dr. Sano previously led a study on vitamin E in patients with moderately severe Alzheimer's disease. She found that the vitamin slowed disease progression in this group of patients as well.

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New studies give strong boost to binary-star formation theory

Astronomers know that about half of all Sun-like stars are members of double or multiple-star systems, but have debated over how such systems are formed.

"The only way to resolve the debate is to observe very young stellar systems and catch them in the act of formation," said John Tobin, of the National Radio Astronomy Observatory (NRAO). "That's what we've done with the stars we observed, and we got valuable new clues from them," he added.

Their new clues support the idea that double-star systems form when a disk of gas and dust whirling around one young star fragments, forming another new star in orbit with the first. Young stars that still are gathering matter from their surroundings form such disks, along with jet-like outflows rapidly propelling material in narrow beams perpendicular to the disk.

When Tobin and an international team of astronomers studied gas-enshrouded young stars roughly 1,000 light-years from Earth, they found that two had previously-unseen companions in the plane where their disks would be expected, perpendicular to the direction of the outflows from the systems. One of the systems also clearly had a disk surrounding both young stars.

"This fits the theoretical model of companions forming from fragmentation in the disk," Tobin said. "This configuration would not be required by alternative explanations," he added.

The new observations add to a growing body of evidence supporting the disk-fragmentation idea. In 2006, a different VLA observing team found an orbiting pair of young stars, each of which was surrounded by a disk of material. The two disks, they found, were aligned with each other in the same plane. Last year, Tobin and his colleagues found a large circumstellar disk forming around a protostar in the initial phases of star formation. This showed that disks are present early in the star formation process, a necessity for binary pairs to form through disk fragmentation.

"Our new findings, combined with the earlier data, make disk fragmentation the strongest explanation for how close multiple star systems are formed," said Leslie Looney of NRAO and the University of Illinois.

"The increased sensitivity of the VLA, produced by a decade-long upgrade project completed in 2012, made the new discovery possible," Claire Chandler of NRAO said.

The new capability was particularly valuable at the VLA's highest frequency band, from 40-50 GHz, where dust in the disks surrounding young stars emits radio waves. The astronomers observed the young stars during 2012 with the VLA and with the Combined Array for Research in Millimeter-wave Astronomy (CARMA) in California.

Tobin, Chandler, and Looney were part of a research team of astronomers from the U.S., Mexico, and the Netherlands. The scientists published their findings in the Astrophysical Journal.

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Researchers use Hubble Telescope to reveal cloudy weather on alien world

A team of scientists led by researchers in the Department of Astronomy and Astrophysics at the University of Chicago report they have definitively characterized the atmosphere of a super-Earth class planet orbiting another star for the first time.

The scrutinized planet, which is known as GJ1214b, is classified as a super-Earth type planet because its mass is intermediate between those of Earth and Neptune. Recent searches for planets around other stars ("exoplanets") have shown that super-Earths like GJ 1214b are among the most common type of planets in the Milky Way galaxy. Because no such planets exist in our Solar System, the physical nature of super-Earths is largely unknown.

Previous studies of GJ 1214b yielded two possible interpretations of the planet's atmosphere. Its atmosphere could consist entirely of water vapor or some other type of heavy molecule, or it could contain high-altitude clouds that prevent the observation of what lies underneath.

But now a team of astronomers led by UChicago's Laura Kreidberg and Jacob Bean have detected clear evidence of clouds in the atmosphere of GJ 1214b from data collected with the Hubble Space Telescope. The Hubble observations used 96 hours of telescope time spread over 11 months. This was the largest Hubble program ever devoted to studying a single exoplanet.

The researchers describe their work as an important milestone on the road to identifying potentially habitable, Earth-like planets beyond our Solar System. The results appear in the Jan. 2 issue of the journal Nature.

"We really pushed the limits of what is possible with Hubble to make this measurement," said Kreidberg, a third-year graduate student and first author of the new paper. "This advance lays the foundation for characterizing other Earths with similar techniques."

"I think it's very exciting that we can use a telescope like Hubble that was never designed with this in mind, do these kinds of observations with such exquisite precision, and really nail down some property of a small planet orbiting a distant star," explained Bean, an assistant professor and the project's principal investigator.

GJ 1214b is located just 40 light-years from Earth, in the direction of the constellation Ophiuchus. Because of its proximity to our solar system and the small size of its host star, GJ 1214b is the most easily observed super-Earth. It transits, or passes in front of its parent star, every 38 hours, giving scientists an opportunity to study its atmosphere as starlight filters through it.

Kreidberg, Bean and their colleagues used Hubble to precisely measure the spectrum of GJ 1214b in near-infrared light, finding what they consider definitive evidence of high clouds blanketing the planet. These clouds hide any information about the composition and behavior of the lower atmosphere and surface.

The planet was discovered in 2009 by the MEarth Project, which monitors two thousand red dwarf stars for transiting planets. The planet was next targeted for follow-up observations to characterize its atmosphere. The first spectra, which were obtained by Bean in 2010 using a ground-based telescope, suggested that the planet's atmosphere either was predominantly water vapor or hydrogen-dominated with high-altitude clouds.

More precise Hubble observations made in 2012 and 2013 allowed the team to distinguish between these two scenarios. The news is about what they didn't find. The Hubble spectra revealed no chemical fingerprints whatsoever in the planet's atmosphere. This allowed the astronomers to rule out cloud-free atmospheres made of water vapor, methane, nitrogen, carbon monoxide, or carbon dioxide.

The best explanation for the new data is that there are high-altitude clouds in the atmosphere of the planet, though their composition is unknown. Models of super-Earth atmospheres predict clouds could be made out of potassium chloride or zinc sulfide at the scorching temperatures of 450 degrees Fahrenheit found on GJ 1214b. "You would expect very different kinds of clouds to form than you would expect, say, on Earth," Kreidberg said.

The launch of NASA's next major space telescope, the 6.5m James Webb Space Telescope (JWST), later this decade should reveal more about such worlds, Kreidberg said. "Looking forward, JWST will be transformative," she said. "The new capabilities of this telescope will allow us to peer through the clouds on planets like GJ 1214b. But more than that, it may open the door to studies of Earth-like planets around nearby stars."

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Cloudy weather revealed on alien world

Dec. 31, 2013 — Weather forecasters on exoplanet GJ 1214b would have an easy job. Today's forecast: cloudy. Tomorrow: overcast. Extended outlook: more clouds.

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Earth's crust was unstable in Archean eon; dripped down into mantle

According to the calculations, this dense primary crust would have descended vertically in drip form. In contrast, the movements of today's tectonic plates involve largely lateral movements with oceanic lithosphere recycled in subduction zones. The findings add to our understanding of how cratons and plate tectonics, and thus also Earth's current continents, came into being.

Because mantle temperatures were higher during the Archean eon, Earth's primary crust that formed at the time must have been very thick and also very rich in magnesium. However, as Johnson and his co-authors explain in their article recently published in Nature Geoscience, very little of this original crust is preserved, indicating that most must have been recycled into Earth's mantle. Moreover, the Archean crust that has survived in some areas such as, for example, Northwest Scotland and Greenland, is largely made of tonalite-trondhjemite-granodiorite complexes and these are likely to have originated from a hydrated, low-magnesium basalt source. The conclusion is that these pieces of crust cannot be the direct products of an originally magnesium-rich primary crust. These TTG complexes are among the oldest features of our Earth's crust. They are most commonly present in cratons, the oldest and most stable cores of the current continents.

With the help of thermodynamic calculations, Dr. Tim Johnson and his collaborators at the US-American universities of Maryland, Southern California, and Yale have established that the mineral assemblages that formed at the base of a 45-kilometer-thick magnesium-rich crust were denser than the underlying mantle layer. In order to better explore the physics of this process, Professor Boris Kaus of the Geophysics work group at Mainz University developed new computer models that simulate the conditions when Earth was still relatively young and take into account Johnson's calculations.

These geodynamic computer models show that the base of a magmatically over-thickened and magnesium-rich crust would have been gravitationally unstable at mantle temperatures greater than 1,500 to 1,550 degrees Celsius and this would have caused it to sink in a process called 'delamination'. The dense crust would have dripped down into the mantle, triggering a return flow of mantle material from the asthenosphere that would have melted to form new primary crust. Continued melting of over-thickened and dripping magnesium-rich crust, combined with fractionation of primary magmas, may have produced the hydrated magnesium-poor basalts necessary to provide a source of the tonalite-trondhjemite-granodiorite complexes. The dense residues of these processes, which would have a high content of mafic minerals, must now reside in the mantle.

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Testosterone in male songbirds may enhance desire to sing, but not song quality

Dec. 30, 2013 — For the male canary, the ability to sing a pitch-perfect song is critical to wooing female canaries. As the seasons change, so does song quality and frequency. The hormone testosterone plays a role in this changing song behavior.

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Researchers at The Johns Hopkins University have found that introducing testosterone in select areas of a male canary's brain can affect its ability to successfully attract and mate with a female through birdsong. They also found that enhancing song activity based on testosterone in one brain area can change the size of a separate brain area that regulates song quality. These findings could shed light on how testosterone acts in the human brain to regulate speech or help explain how anabolic steroids affect human behaviors.

In a paper recently published in the journal Proceedings of the National Academy of Sciences, graduate student and lead author Beau Alward along with senior author Gregory F. Ball, vice dean for science and research infrastructure and professor in the Department of Psychological and Brain Sciences in the Zanvyl Krieger School of Arts and Sciences, found that when male canaries received testosterone in a specific area in the brain, the frequency of the song increased. However, the quality of songs sung did not change in comparison to the male birds that received testosterone throughout the brain.

Hormones such as testosterone coordinate several areas of the avian brain to produce a physiological response, such as birdsong, said Alward. To determine how testosterone influences birdsong, Alward and Ball divided 20 canaries into two groups to receive a hormone implant.

One group received the testosterone injection in a specific area of the brain, the medial preoptic nucleus, or POM, which controls sexual motivation in many animals as well as in humans. The second group was received with testosterone that acted throughout the brain. A third group received no hormone treatment at all.

Alward said both groups of birds that received testosterone treatment sang but the researchers noticed in some cases the canaries' songs were sung poorly. The birds that only received testosterone to the POM sang at high rates, but could not produce high quality song that is most attractive to females.

"Our data suggests that testosterone needs to act in different areas of the brain to regulate the specific components of this complex social phenomenon," said Alward. "It appears that, like in so many other species, testosterone in the POM can regulate an animal's motivation, in this case, the motivation to sing. However, singing and courting a female is more than just motivation. There is the quality of the song that is required to successfully attract a mate and then the process of attending to the female, or singing to her, when she is there which requires the coordination of multiple brain regions."

Meanwhile, the canaries that received testosterone throughout the brain displayed high-quality typical canary vocalization behavior, consistent with the idea that the hormone acts on several different brain areas to regulate how much as well as how well the birds can sing.

The canary brain is considered a good model for brain study due to its ability to change its neural pathways and synapses in response to changes in behavior, the seasonal environment and injury. For the birds used in the study, the researchers artificially replicated a springtime environment to study the birdsong and mating habits that occur during the appropriate season. The birds responded to the spring-like conditions with birdsong and mating behaviors as they normally would at that time of the year.

The researchers say these results have broad implications for research concerning how steroid use in humans affects sexual behaviors and how hormones regulate the difference components of speech in humans.

"The hormones in these birds are identical to those in humans and they can regulate brain changes in a similar manner," said Ball.

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Monday, December 30, 2013

Business 110 inch TV goes on sale for £100,000

2013/12/31

The world’s largest TV at 110 inches went on sale today for £100,000 from Samsung.

The TV uses ultra-high definition technology – said to have 4x higher pixel density than HD.

The TV is 102 inches wide and 70 inches tall. Samsung says it has had ten orders already.

The previous biggest TV was 85 inches.

UHDTV was developed by NHK and adopted as a standard by the CEA.

It applies to TVs with an aspect ratio of at least 16:9 and at least one digital input capable of carrying and presenting native video at a minimum resolution of 3,840 × 2,160 pixels.

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Viewpoints EDA tools and IP are still design differentiators, says Synopsys

2013/12/30

Gabriel Lezmi

The European macro environment has been showing signs of uncertainty, and the continued pressure of this economic squeeze is challenging. Simultaneously, our customers continue to have a high degree of focus on aggressive design activity, writes Gabriel Lezmi, vice president of Synopsys sales in Europe.

The result is a strong demand for advanced tools and silicon intellectual property (IP).

For our customers, high-impact EDA and IP are more differentiating than ever before, making deep collaboration with the right supplier crucial. Synopsys benefits from these trends and our important investments in R&D continue to pay off.

Looking at the continued technology evolution, Synopsys enables the most advanced designs in the world. Be it design at the most innovative FinFET technology nodes, or advanced design at more established nodes, customers rely on Synopsys whenever they want competitive differentiation.

Over the past 10 years, the use of third-party commercial IP has gone from experimental to mainstream. In parallel, IP complexity has evolved from simple cost-advantaged blocks, to a broad portfolio of all the main interface protocols, to extremely complex, state-of-the-art and rapidly evolving next-generation solutions.

Today, software drivers and even entire operating systems can be delivered with IP cores, creating IP subsystems. Recently, we even announced a new low-power IP subsystem for sensors, aimed at the emerging market for the Internet of Things. Something that makes it different is that it’s an integrated, pre-verified system that sensor developers can purchase off-the-shelf, rather than developing and assembling each component themselves.

The amount of IP that the top 20 semiconductor vendors consume has increased by 5X over the past few years. Synopsys has about 1,900 engineers designing commercial IP blocks, giving us the number-one position in interface, embedded memories and analog IP.

We estimate that only about 50 percent of these types of blocks are outsourced today, and we expect this market segment to continue to grow, driven by more outsourcing and by additional protocols and titles, such as interface IP for sensors.

Europe is well positioned in the fast growing high-performance electronic sensor market with its specialty fabs and foundries. To support our customers in this important area, we’ve been providing simulation tools to help process refinement, and we’ve been collaborating to develop standard iPDKs.

The largest bottleneck in system and chip design today is in verification. Synopsys has been delivering verification solutions for many years in both leading-edge digital verification and analog circuit simulation, where tool performance is key and a complete solution is increasingly a must.

In systems, the need to simultaneously verify hardware and software is growing in equally rapid importance. The combination of emulation, FPGA-based prototyping and virtual prototyping is unique in its breadth and capabilities. In the past, customers typically built and assembled complex FPGA boards in-house to complement their chip simulation and accelerate their hardware/software debugging.

In automotive, for example, our customers are taking advantage of our leading virtual prototyping technology so they can start their software development earlier and accelerate system integration, test and validation.

With the addition of the most comprehensive open debug system, (Verdi), and our verification IP offering, we address the entire verification market with outstanding tools.

By investing more than 30 percent of our revenue in R&D each year, and by employing more than 1,000 engineers who work closely with European companies, Synopsys continues to demonstrate broad strength and technology innovation.

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