Flex Touchscreen Interface: warp before you scroll

Parts of the content that are normally pushed outside the screen by scrolling are distorted to keep them within the screen.
This enables users to navigate around the map while keeping an eye on the parts of the map that were originally on the screen.

From Technabob

Scrolling is one of the most frequent actions made in interacting with touchscreen devices.

For me it’s such a basic action that I actually didn’t think too much of it, until I saw this new control interface developed by a research team at Osaka University.
Called the Flex, it’s a touchscreen interface that basically distorts the contents of the screen when you put your finger down and scroll, as opposed to scrolling immediately.
When you let go of the screen, then the content will warp back into its original shape, scrolling in the process.

What are the advantages of having an interface that distorts the content before scrolling it?
First, it lets you preview what you’re going to see when you scroll before you actually scroll.
With today’s interface, the moment you move your finger to scroll the content immediately moves.
With Flex, you can for example distort Google Maps in several directions and quickly preview the surrounding area while still seeing where you originally were on the map.

Flex also makes it easier to go back to where you originally were on the screen, although with small touchscreens like on smartphones that second advantage might not be too noticeable.
The researchers also claim that Flex could be easily integrated into any touchscreen-based device, so don’t be surprised if you find yourself being able to distort the screen of your next phone or tablet.

Gravity satellite yields 'Potato Earth' view

It looks like a giant potato in space

From BBCNews

And yet, the information in this model is the sharpest view we have of how gravity varies across the Earth.

The globe has been released by the team working on Europe's Goce satellite.
It is a highly exaggerated rendering, but it neatly illustrates how the tug we feel from the mass of rock under our feet is not the same in every location.
Gravity is strongest in yellow areas; it is weakest in blue ones.

Scientists say the data gathered by the super-sleek space probe is bringing a step change in our understanding of the force that pulls us downwards and the way it is shaping some key processes on Earth.
Chief among these new insights is a clearer view of how the oceans are moving and how they redistribute the heat from the Sun around the world - information that is paramount to climate studies.

Those interested in earthquakes are also poring over the Goce results.
The giant jolt that struck Japan this month and Chile last year occurred because huge masses of rock suddenly moved.

Goce should reveal a three-dimensional view of what was going on inside the Earth.
"Even though these quakes resulted from big movements in the Earth, at the altitude of the satellite the signals are very small.
But we should still seem them in the data," said Dr Johannes Bouman from the German Geodetic Research Institute (DGFI).

Technically speaking, the model at the top of this page is what researchers refer to as a geoid.
It is not the easiest of concepts to grasp, but essentially it describes the "level" surface on an idealised world.
Look at the potato and its slopes.
Put simply, the surface which traces the lumps and bumps is where the pull of gravity is the same.

Described another way, if you were to place a ball anywhere on this potato, it would not roll because, from the ball's perspective, there is no "up" or "down" on the undulating surface.
It is the shape the oceans would adopt if there were no winds, no currents and no tides.
The differences have been magnified nearly 10,000 times to show up as they do in the new model.

Even so, a boat off the coast of Europe (bright yellow) can sit 180m "higher" than a boat in the middle of the Indian Ocean (deep blue) and still be on the same level plain.
This is the trick gravity plays on Earth because the space rock on which we live is not a perfect sphere and its interior mass of rock is not evenly distributed.

The Gravity Field and Steady-State Ocean Circulation Explorer (Goce) was launched in March 2009.
It flies pole to pole at an altitude of just 254.9km - the lowest orbit of any research satellite in operation today.
The spacecraft carries three pairs of precision-built platinum blocks inside its gradiometer instrument that can sense fantastically small accelerations.

This extraordinary performance allows it to map the almost imperceptible differences in the pull exerted by the mass of the planet from one place to the next - from the great mountain ranges to the deepest ocean trenches.
Just getting it to work has tested the best minds in Europe.
"Ten years ago, Goce was science fiction; it's been one of the biggest technological challenges we have mastered so far in the European Space Agency," said Dr Volker Liebig, the organisation's director of Earth observation.
"We measure one part in 10 trillion; that's beyond what we understand in our daily experience."

An initial two months of observations were fashioned into a geoid that was released in June last year.
The latest version, released in Munich at a workshop for Goce scientists, includes an additional four months of data.
A third version will follow in the autumn.
Each release should bring an improvement in quality.
"The more data we add, the more we are able to suppress the noise in the solutions, and the errors scale down," said Dr Rune Floberghagen, the European Space Agency's Goce mission manager.

And of course the more precisely you know the geoid, the better the science you can do using the geoid.
"We are seeing completely new information in areas like the Himalayas, South-East Asia, the Andes mountain range, and in Antarctica particularly - the whole continent is desperate for better gravity field information, which we are now providing."
Goce sees gravity differences at Japan and the tectonic boundary (blue) that triggered the quake.

Goce sees gravity differences at Japan
and the tectonic boundary (blue) that triggered the quake

One major goal of the Goce endeavour is to try to devise a universal reference for mean sea-level.

This would make it possible to compare the true heights of things anywhere on the globe.
"We hope that after completion of the mission we will have one unified global height system," explained Professor Reiner Rummel, the chairman of the Goce scientific consortium.

"Usually, heights in the UK, say, are connected to one benchmark which is connected to mean sea-level, which might be measured at Liverpool, for example.
The French do the same, the Australians do the same and the Chinese do the same - but mean sea-level differs from one country to the next. Now, with Goce, we can unify this so that we don't get the sort of surprises we had when they built the Channel Tunnel and discovered a half-metre offset between the UK and France."

The mission has funding up until the end of 2012 when, like all European Space Agency Earth observation missions, it must seek further financial support from member states to continue.
Goce has delivered the data promised in its primary mission - some 14 months of observations in total - but researchers would like to see it fly for as long as is possible.
Because it operates so low in the sky - a requirement of being able to sense gravity signals which are incredibly weak - it needs an engine to push it forwards through the wisps of atmosphere still present at its altitude.

Without this engine, Goce would rapidly fall to Earth.
But the mission team reported here in Munich that Goce probably has sufficient propellant onboard to drive its engine until deep into 2014.

Links :

• TheGuardian : Goce satellite maps the Earth's gravity in unprecedented precision
• MarineGeoGarage blog : Goce gravity mission traces ocean circulation

Icebergs in the Antarctic play important role in carbon cycle

After following the path of a drifting iceberg,

research team's discoveries could have implications for climate change studies

From SCRIPPS

Icebergs cool and dilute the ocean water they pass through and also affect the distribution carbon-dioxide-absorbing phytoplankton in the Southern Ocean, according to a team of researchers from UC San Diego and the University of San Diego.

The effects are likely to influence the growth of phytoplankton in the Atlantic sector of the Southern Ocean and especially in an area known as "Iceberg Alley" east of the Antarctic Peninsula (NSF photo gallery).

Enhanced phytoplankton growth would increase the rate at which carbon dioxide is removed from the ocean, an important process in the carbon cycle, said the leaders of the National Science Foundation (NSF)-funded study.

The results appear in the journal Deep-Sea Research II in a paper titled "Cooling, dilution and mixing of ocean water by free-drifting icebergs in the Weddell Sea." The main results from this paper were also highlighted in Nature Geoscience's March issue.

"Iceberg transport and melting have a prominent role in the distribution of phytoplankton in the Weddell Sea," said paper lead author John J. Helly, who holds joint appointments at the San Diego Supercomputer Center and Scripps Institution of Oceanography at UCSD.
"These results demonstrate the importance of a multi-disciplinary scientific team in developing a meaningful picture of nature across multiple scales of measurement and the unique contributions of ship-based field research."

"The results demonstrate that icebergs influence oceanic surface waters and mixing to greater depths than previously realized," added paper co-author Ronald S. Kaufmann, Associate Professor of Marine Science and Environmental Studies at the University of San Diego.

The findings document a persistent change in physical and biological characteristics of surface waters after the transit of an iceberg.
The change in surface water properties such as salinity lasted at least ten days, far longer than had been expected.

Sampling was conducted by a surface-mapping method used to survey the area around an iceberg more than 32 kilometers (20 miles) in length.
The team surveyed the same area again ten days later, after the iceberg had drifted away.
After ten days, the scientists observed increased concentrations of chlorophyll a and reduced concentrations of carbon dioxide compared to nearby areas without icebergs.

"We were quite surprised to find the persistence of the iceberg effects over many days," said Helly, director of the Laboratory for Environmental and Earth Sciences at SDSC.

The new results demonstrate that icebergs provide a connection between the geophysical and biological domains that directly affects the carbon cycle in the Southern Ocean.
This research significantly extends previous research results conducted in the same environment and reveals the dynamic properties of icebergs and their effects on the ocean in unexpected ways.

"These findings confirm that icebergs are a dynamic and significant component of polar ecosystems," said Roberta L. Marinelli, director of the NSF's Antarctic Organisms and Ecosystems Program.
NSF manages the U.S. Antarctic Program, through which it coordinates all U.S. research on the southernmost continent and aboard ships in the Southern Ocean.

Links :

• TheRegister : Antarctic glacier melt maybe 'not due to climate change'
  

Japan works to stop radioactive water leaking into sea

Fukushima nuclear power plant
Geolocalization with Marine GeoGarage

From BBC

Workers at Japan's quake-hit nuclear plant are trying to prevent radioactive water from seeping into the sea.

A fisherman collects seaweed in the Pacific Ocean near Katsuura city, south of Fukushima.
Levels of cesium 137 radiation pouring into the sea are causing concern
Photograph: Everett Kennedy Brown/EPA

Highly radioactive liquid has been found inside and outside several reactor buildings.
Small amounts of plutonium have also been detected in soil at the plant - the latest indication that one of the reactors suffered a partial meltdown.

Prime Minister Naoto Kan said his government was on maximum alert, and the situation remained "unpredictable".
Japan's Nuclear Safety Agency said there was still no confirmation that radioactive water has seeped into the sea from flooded tunnels within the Fukushima Daiichi plant.

Water levels in underground tunnels adjoining reactors 1, 2 and 3 had been stable, the agency said.
Workers from plant operator Tepco have been piling sandbags and concrete blocks around the shafts, which lie between 55m and 70m from the shore, the agency said.

Work to safely remove the contaminated water is a priority, government officials said, but stressed more water would need to be used to continuing cooling fuel rods.
"We need to avoid the fuel rods from heating up and drying up. Continuing the cooling is unavoidable... We need to prioritise injecting water," Chief Cabinet Secretary Yukio Edano told a news conference.

Tepco and the safety agency say the exact source of the radioactive leak is unknown.
But, like the discovery of plutonium, the high levels of radiation found inside and outside reactor buildings are likely to have come from melted fuel rods.
The plutonium - used in the fuel mix in the No 3 reactor - is not at levels that threaten human health, officials said.

Engineers are battling to restore power and restart the cooling systems at the stricken nuclear plant, which was hit by a powerful quake and subsequent tsunami over two weeks ago.
Operator Tepco has been accused of a lack of transparency and failing to provide information more promptly.
It was also heavily criticised for issuing erroneous radiation readings at the weekend.

On Tuesday, National Strategy Minister Koichiro Gemba said the government could consider temporarily nationalising the energy giant.
His comments came a day after shares in the company dropped to their lowest level in three decades.

Human suffering

The massive 9.0-magnitude quake and the subsequent tsunami on 11 March are now known to have killed more than 11,000 people, with at least 16,700 people still missing across north-eastern Japan.

The authorities are struggling to identify about 4,000 bodies in Iwate, Miyagi and Fukushima prefectures.
''They were collected at places far from their residential areas (due to being swept away by the tsunami), or their families as a whole must have been washed away by the tsunami,'' a senior official at the National Police Agency was quoted by Kyodo news agency as saying.

Police are posting information about clothes and physical appearance online, the report said.
Some 190,000 people are continuing to live in temporary shelters, many having to cope with food, water and fuel shortages. (photos TheGuardian)
The breakdown of local administration has also left municipal offices struggling to assess the damage and casualties in some coastal areas devastated by the tsunami, national broadcaster NHK reports.

Links :

• NYT : In Japan, Cesium in seawater could threaten marine life
• JapanTimes : Q&A : Long-life cesium top threat to seafood
• BBC : Fukushima seawater radioactivity rises
  
• FT : Nuclear fears hit fish trade
  
• DeepBlueHome blog : The radioactive ocean, a primer
  

Against the tide: currents keep dolphins apart

For dolphins, chemistry is in the water

From WCS

Conservationists from the Wildlife Conservation Society, the American Museum of Natural History, and other conservation and research groups have discovered that groups of dolphins in the western Indian Ocean do not mix freely with one another.

In fact, dolphin populations are kept separate by currents and other unseen factors.

This is an Indo-Pacific humpback dolphin from the coastal waters of Oman, a country on the southeast coast of the Arabian Peninsula.

(Photo Credit: Graeme Hornby.)

Specifically, the researchers have found that genetically distinct populations of the Indo-Pacific humpback dolphin may be formed in part by currents, surface temperature differences, and other environmental barriers, a finding made possible by using both genetic data from dolphins and environmental information from remote-sensing satellites.

The study appears in the advance online version of the journal Heredity.

The study represents a breakthrough in high-tech research on marine wildlife and a foundation for ensuring sound future management decisions on the Indo-Pacific humpback dolphin, a distant relative of the more familiar bottlenose dolphin.

It is one of the first examinations of how environmental factors in marine environments can influence population structure in marine species, and can potentially enhance an understanding about the environmental factors that may drive the evolution of new species.

“Examining how environmental factors affect the population structure of marine species is a complex task. Doing this over entire regions is a challenge,” said lead author Dr. Martin Mendez of the Sackler Institute for Comparative Genomics at the American Museum of Natural History.

“Unlike studies of terrestrial species in easily observable environments, marine species are difficult to follow and the barriers they encounter are often invisible to us. Molecular technologies and remote sensing data can be combined to shed light on these mysteries.”

The team started its examination of Indo-Pacific humpback dolphin populations using genetics, analyzing mitochondrial DNA data from more than 90 individual dolphins from the coastal areas of Oman, Mozambique, Madagascar, Tanzania, and South Africa.

The scientists used this “genetic marker” to statistically measure gene flow between dolphin groups at different locations.

The researchers then compared their molecular findings with 13 years of data from NASA’s satellites on environmental factors such as currents, temperature, turbidity, levels of chlorophyll, and dissolved organic matter.

Researchers used environmental data from remote sensing satellites (such as ocean depth in this figure) to examine the genetic distinctiveness of dolphin populations located off the coasts of Oman, Tanzania, Mozambique, and South Africa.
(Photo Credit: Heredity)

Dr. Mendez and his co-authors have succeeded in finding support for the hypothesis that environmental differences between regions could influence the population structure of marine species.

Specifically, they found correlations between regional environmental differences and measurable genetic breaks between populations of dolphins from Mozambique and Tanzania in Africa, and Oman on the Saudi Arabian peninsula.

Occurring in mostly coastal habitats stretching from the western Indian Ocean to Australian waters, the Indo-Pacific humpback dolphin gets its name from the distinctive hump just below the marine mammal s dorsal fin (as in this individual animal from the coast of northwest Madagascar.

(Photo Credit: © Martin Mendez)

On the largest regional scale, data on currents seem to correlate with genetic distinctiveness between certain populations.

In particular, the South Equatorial Current—which runs west across the Indian Ocean before diverging north and south as it meets the African continent—seems to represent a barrier between genetically distinct populations of Mozambique and Tanzania; the current may play a role in creating them.

Seasonal monsoons also potentially contribute to what researchers found was a lack of southbound migration (or detectable gene flow) along the African coast.

The researchers also found agreement on smaller spatial scales.

Differences in temperature, chlorophyll, turbidity, and dissolved organic matter between regions also coincided with genetic differences between dolphin populations in Mozambique, Tanzania, and Oman.

The two coastal regions without detectable genetic distinctiveness between dolphin populations—Mozambique and South Africa—also lacked significant environmental differentiation between them, a finding in agreement with the correlation of both genetic and environmental differences detected in other areas.

“With increasing development and potential threats to coastal habitats, understanding the population structure of the Indo-Pacific humpback dolphin in conjunction with environmental factors is an important step in formulating management recommendations and protection measures for the species,” said Dr. Howard Rosenbaum, Director of the Wildlife Conservation Society’s Ocean Giants Program.

Named for a distinctive hump under the dorsal fin of some individuals, the Indo-Pacific humpback dolphin grows up to 10 feet in length and ranges from dark gray to pink and/or white in color.

The species generally inhabits coastal waters, deltas, estuaries, and occurs throughout the Indian Ocean basin to the coasts of Australia.

The Indo-Pacific humpback dolphin is listed as “Near Threatened” by the International Union for Conservation of Nature (IUCN) and is threatened by habitat loss, disruption, and fishing activity.