Knowledge Update

​London, April 13 (IANS) Researchers have for the first time found it possible to generate simultaneous immune response against diseases such as Hepatitis C virus and HIV, raising the possibility of a combined vaccination.

An estimated 2.3 million people globally are co-infected with HIV and HCV. HCV is the leading cause of non-AIDS deaths in co-infected individuals.

"While we have drugs to treat both HIV and HCV, these are out of reach for many and do not prevent reinfection," said lead researcher Lucy Dorrell, professor at University of Oxford in London. 

“Knowing that it may be possible to vaccinate a single individual against both diseases opens up huge possibilities for rolling back epidemics of disease and co-infection," added one of the researchers Ellie Barnes, professor. 

The findings showed that vaccine priming against HCV and HIV induced immune response in the body, measured by the number of HIV and HCV specific T-cells found in a sample of blood. 

These immune responses were further increased following the boost vaccination.

In addition, co-administration of HCV and HIV components of the boost did not impair the magnitude or breadth of either HCV or HIV specific T-cell responses compared to each alone. 

All vaccines were given as an intramuscular injection and both were well tolerated.

The study showed that the 'prime boost' approach is compatible with co-administration of vectors encoding for HIV and HCV antigens -- molecules capable of inducing an immune response to the immune system.

Following this, booster vaccinations are given with the same combination of HCV and HIV fragments.

The Phase 1 study enrolled 32 healthy volunteers in three groups. Group one received only HCV investigational vaccines at weeks 0 and 8. 

The second group received only HIV investigational vaccines following the same dosing schedule. 

The final group received both HCV and HIV investigational vaccines that were co-administered.

The study was presented at The International Liver Congress 2016 in Barcelona, Spain.​

​New York, April 13 (IANS) A team led by an Indian-origin professor at Columbia University has created a novel sheet camera that can be wrapped around everyday objects to capture images that cannot be taken with one or more conventional cameras.

"Cameras today capture the world from essentially a single point in space. While the camera industry has made remarkable progress in shrinking the camera to a tiny device with ever increasing imaging quality, we are exploring a radically different approach to imaging," said Shree K Nayar, computer science professor at Columbia University. 

"We believe there are numerous applications for cameras that are large in format but very thin and highly flexible," added Nayar who graduated from the Birla Institute of Technology, Ranchi, in 1984.

Nayar's team designed and fabricated a flexible lens array that adapts its optical properties when the sheet camera is bent. 

This optical adaptation enables the device to produce high quality images over a wide range of sheet deformations.

If such an imaging system could be manufactured cheaply -- like a roll of plastic or fabric -- it could be wrapped around all kinds of things, from street poles to furniture, cars, and even people's clothing, to capture wide, seamless images with unusual fields of view. 

"The adaptive lens array we have developed is an important step towards making the concept of flexible sheet cameras viable," Nayar noted. 

"The next step will be to develop large-format detector arrays to go with the deformable lens array. The amalgamation of the two technologies will lay the foundation for a new class of cameras that expand the range of applications that benefit from imaging," he said.

The novel technology is set to be presented at the international conference on computational photography (ICCP) at Northwestern University, in Illinois from May 13 to 15.​

New York, April 14 (IANS) Imagine shirts that act as antennas for smartphones or tablets, workout clothes that monitor fitness level or even a flexible fabric cap that senses activity in the brain!

All this will soon be possible as the researchers working on wearable electronics have been able to embroider circuits into fabric with super precision -- a key step toward the design of clothes that gather, store or transmit digital information.

"A revolution is happening in the textile industry. We believe that functional textiles are an enabling technology for communications and sensing and one day, even for medical applications like imaging and health monitoring," said lead researcher John Volakis from Ohio State University.

The milestone achieved by the Ohio researchers has the potential to allow integration of electronic components such as sensors and computer memory devices into clothing with 0.1 mm precision.

With further development, the technology could also lead to sports equipment that monitor athletes' performance or a bandage that tells doctors how well the tissue beneath it is healing.

Volakis' team created the functional textiles, also called "e-textiles," on a typical tabletop sewing machine. 

Like other modern sewing machines, it embroiders thread into fabric automatically based on a pattern loaded via a computer file. 

The researchers substituted the thread with fine silver metal wires that, once embroidered, feel the same as traditional thread to the touch.

"For the first time, we've achieved the accuracy of printed metal circuit boards, so our new goal is to take advantage of the precision to incorporate receivers and other electronic components," added Volakis in a paper published in the journal IEEE Antennas and Wireless Propagation Letters.

The shape of the embroidery determines the frequency of operation of the antenna or circuit.

"Shape determines function. And you never really know what shape you will need from one application to the next. So we wanted to have a technology that could embroider any shape for any application," noted Asimina Kiourti, co-author of the study.

She also incorporated some techniques common to microelectronics manufacturing to add parts to embroidered antennas and circuits.​

​London, April 12 (IANS) A team of scientists led by Oxford University has made a discovery that can improve chances of developing an effective vaccine against Tuberculosis (TB).

The researchers identified new biomarkers for TB which have shown for the first time why immunity from the widely used BCG vaccine is so variable. 

The biomarkers will also provide valuable clues to assess whether potential new vaccines could be effective, the team said.

TB remains one of the world's major killer diseases. The only available BCG vaccine works well (estimated 50 percent effective) to prevent severe disease in children but is very variable (0 percent to 80 percent effective) in adults.

With a pressing need for a TB vaccine that is more effective than BCG, the Oxford team working with colleagues from the University of Cape Town and the London School of Hygiene and Tropical Medicine set out to identify immune correlates that could facilitate TB vaccine development. 

The team, led by professor Helen McShane and Dr Helen Fletcher, studied immune responses in infants in South Africa who were taking part in a TB vaccine trial.

The team carried out tests for 22 possible factors. 

“These are useful results. They show that antigen-specific T cells are important in protection against TB but that activated T cells increase the risk,” explained professor McShane from Oxford in a paper that appeared in the journal Nature Communications.

“For the first time we have some evidence of how BCG might work and also what could block it from working. Although there is still much work to do, these findings may bring us a step closer to developing a more effective vaccine for TB,” added Dr Fletcher from the London School of Hygiene and Tropical Medicine.

The team is working to develop an effective TB vaccine aimed at protecting more people from the disease.​

​New York, April 13 (IANS) World-renowned British astrophysicist Stephen Hawking on Tuesday teamed up with Russian billionaire Yuri Milner and Facebook founder Mark Zuckerberg in a $100 million effort to make tiny spaceships capable of interstellar space travel.

Hawking and Milner made the joint announcement at a press conference held at One World Observatory in New York City on Tuesday, Xinhua reported.

The project, dubbed "Breakthrough Starshot," is a research and engineering programme that aims to build laser beam propelled "nanocrafts" that can travel at 20 percent of lightspeed -- more than 1,000 times faster than current fastest spacecraft.

According to Milner, once the "nanocrafts" are built, they could reach Alpha Centauri, a star 4.37 light-years away, approximately 20 years in a fly-by mission.

Alpha Centauri is one of the closest star systems to the solar system and the current fastest spacecraft would have to spend 30,000 years to get there.

The "nanocrafts" are gram-scale robotic spacecrafts consisting of two main parts: a computer CPU sized "StarChip" and a "Lightsail" made with metamaterials no more than a few hundred atoms thick.

Although weighing just a few grams, the "StarChip" is a fully functional space probe, which carries various equipment including cameras, navigation and communication.

"The 'StarChip' can be mass-produced at the cost of an iPhone," Milner said.

The "nanocrafts" can then be propelled into space by a powerful laser beam, which according to Avi Loeb, a theoretical physicist and panelist at the news conference, will carry a power of 100 gigawatt.

"This is the power needed to lift off a space shuttle," Loeb said.

Milner and the scientists believe that with the rising power and falling costs of lasers, the entire process is practical within a couple of years.

"Fifteen years ago, it would not have made sense to make this investment. Now we have looked at the numbers, and it does," Milner said.

The project was part of the Breakthrough Initiatives first launched in July 2015 by Hawking and Milner, including a series of research plans to scan the 100 galaxies closest to the Milky Way in search for aliens. "Starshot" is its newest endeavor.

Hawking believes that human's innate sense to transcend limits is the driving force behind the project. "Gravity pins us to the ground, but I just flew to America."

While one cannot hear the joking tone through Hawking's voice synthesizer, his humour had been easily received.

What the scientists are looking for is not just reaching Alpha Centauri, but what can be learned during the efforts.

"A lot of science will be learned by the process of going through this, making this happen," said panelist Mae Jemison, a former NASA astronaut. 

"There is big task ahead, there's a big leap in getting something of a micro size to go at some percentage of the speed of light. That will have all kinds of reverberations."

Tuesday also marked the 55th anniversary of the first human space flight by Russian cosmonaut Yuri Gagarin.

"Today we commit to this next great leap into the cosmos because we are human and our nature is to fly," Hawking said.​

New York, April 13 (IANS) An image taken in 1917 and kept on an astronomical glass plate with the Carnegie Institution for Science (CIS) has revealed the first-ever evidence of a planetary system beyond our own Sun.

The unexpected find was recognised in the process of researching an article about planetary systems surrounding white dwarf stars in the journal New Astronomy Reviews.

The Review's author Jay Farihi from University College London and Carnegie Observatories' director John Mulchaey were looking for a plate in the Carnegie archive that contained a spectrum of van Maanen's star.

It is a white dwarf discovered by Dutch-American astronomer Adriaan van Maanen in the very year the plate was made.

Stellar spectra images allowed 19th century astronomers to develop a system for classifying stars that is still used today. 

Modern astronomers use digital tools to image stars but for decades, they would use glass photographic plates both to take images of the sky, and to record stellar spectra.

When Farihi examined the spectrum, he found something quite extraordinary.

Carnegie's 1917 spectrum of van Maanen's star revealed the presence of heavier elements such as calcium, magnesium, and iron, which should have long since disappeared into the star's interior due to their weight.

Astronomers now know that that van Maanen's star and other white dwarfs with heavy elements in their spectra represent a type of planetary system featuring vast rings of rocky planetary remnants that deposit debris into the stellar atmosphere. 

“The unexpected realisation that this 1917 plate from our archive contains the earliest recorded evidence of a polluted white dwarf system is just incredible,” said Mulchaey. 

Planets themselves have not yet been detected orbiting van Maanen's star, nor around similar systems, but Farihi is confident it is only a matter of time.

Carnegie has one of the world's largest collections of astronomical plates with an archive that includes about 250,000 plates from three different observatories.

“We have a ton of history sitting in our basement and who knows what other finds we might unearth in the future?” asked Mulchaey.

New York, April 12 (IANS) Infants' brains can understand what they are observing and thus can copy other people's action, finds a new study providing the first evidence that directly links neural responses from the motor system to overt social behaviour in infants.

Babies understand what they are observing. There is a direct connection between observing others, understanding what others are doing, and learning how to act -- abilities which are often disrupted in developmental disabilities, including autism, the researchers said.

Like adults, infants show this response when acting themselves and when watching others' actions, suggesting that the motor system of babies may play a role in the perception of others' actions, the researchers pointed out. 

"Our research provides initial evidence that motor system recruitment is contingently linked to infants' social interactive behaviour," said lead author Courtney Filippi, doctoral candidate at the University of Chicago in the US. 

The findings showed that recruiting the motor system during action encoding predicts infants' subsequent social interactive behaviour, the researchers stated.

"This understanding on the part of a baby involves not just seeing the other person's action, but also involves the baby's own motor system, which is recruited when he or she chooses the same toy," said Helen Tager-Flusberg, professor at Boston University in the US, who was not involved in the research. 

The study, published in the journal Psychological Science, showed that by the middle of their first year of life, babies begin to understand that people act intentionally.

"Here we looked at the development of social cognition, social behaviour, and the motor system, all of which are critical for human development and are often disrupted in developmental disabilities, including autism," explained co-author Amanda Woodward, professor at the Chicago University.

For the study, the team involved 36 seven-month-old infants, whose brain activity was measured using electroencephalography (EEG), during an experiment, where each infant had to observe a person reaching out to a toy. 

Babies' brain activity predicted how they would respond to the person's behaviour.

When the infants recruited their motor system while observing the person grasp the toy, they subsequently imitated him. 

When they didn't imitate the person, there was no detectable engagement of the motor system in their brain activity as they watched him.​

Washington, April 13 (IANS) The first expandable habitats for astronauts that may help set the design of deep space habitats including on Mars is set to be installed to the International Space Station (ISS) on April 16.

Expandable habitats are designed to take up less room on a rocket but provide greater volume for living and working in space once expanded.

This first test of an expandable module will allow investigators to gauge how well the habitat performs overall and how well it protects against solar radiation, space debris and the temperature extremes of space.

Once the test period is over, BEAM will be released from the space station and will burn up during its descent through Earth's atmosphere.

The Bigelow Expandable Activity Module (BEAM) will be attached to the station's Tranquility module over a period of about four hours, the US space agency said in a statement.

Using the robotic arm, ground controllers at NASA's Johnson Space Center in Houston will remove BEAM from the unpressurised trunk of SpaceX's Dragon spacecraft.

NASA astronauts aboard the station will secure BEAM using common berthing mechanism controls.

BEAM was launched aboard Dragon spacecraft from Cape Canaveral Air Force Station in Florida on April 8.

At the end of May, the module will be expanded to nearly five times its compressed size of 7 feet in diameter by 8 feet in length to roughly 10 feet in diameter and 13 feet in length.

Astronauts will first enter the habitat about a week after expansion and, during a two-year test mission, will return to the module for a few hours several times a year to retrieve sensor data and assess conditions.

The BEAM project is co-sponsored by NASA's Advanced Exploration Systems Division and Bigelow Aerospace.​

Sydney, April 12 (IANS) A team of researchers has demonstrated that a new plant-derived drug can block the progression of multiple sclerosis.

Multiple Sclerosis (MS) is a disease that affects the brain and spinal cord and is also a chronic incurable condition marked by attacks that bring gradual deterioration in the patient's health. It has affected nearly 2.5 million people worldwide.

The new drug -- named T20K -- was extracted from a traditional medicinal plant, the Oldenlandia affinis.

"This is a really exciting discovery because it may offer a whole new quality of life for people with this debilitating disease," said Christian Gruber, researcher at University of Queensland in Australia. 

The findings demonstrated in an animal model showed that T20K stopped progression in the normal clinical symptoms of MS.

The new treatment arose from a synthesised plant peptide, a class of drugs known as cyclotides.

"Cyclotides are present in a range of common plants, and they show significant potential for the treatment of auto immune diseases," Gruber noted in the paper published in the journal PNAS.

The new drug is to be taken by mouth, in contrast to some current MS treatments where patients need to have frequent injections.

"The T20K peptides exhibit extraordinary stability and chemical features that are ideally what you want in an oral drug candidate," Gruber stated.

The breakthrough could be a step forward in preventing and treating MS and other autoimmune diseases, the researchers concluded.​

​Washington, April 9 (IANS) US space firm SpaceX resumed its resupply mission to the International Space Station (ISS) on Friday, carrying aboard an experimental inflatable space habitat that might be crucial for future deep space explorations.

The California-based company also made history by landing the first stage of its Falcon 9 rocket on a droneship in the Atlantic Ocean, after it launched the Dragon spacecraft at 4:43 p.m. (2043 GMT) from Cape Canaveral Air Force Station in Florida, Xinhua reported.

This was SpaceX's eighth cargo mission to the ISS. It also marked the first flight of Dragon to the ISS since June, when the Falcon 9 rocket exploded about two minutes after liftoff.

As usual, SpaceX attempted to land the Falcon 9's first stage on the "Of Course I Still Love You" droneship, which was stationed in the Atlantic Ocean off the Florida coast.

Minutes later, the company posted a photo via Twitter in which the first stage was clearly seen standing on the deck of the ship.

It is the first time SpaceX has been able to stick a landing on a droneship after four previous such attempts ended in failure. It also achieved one successful soft landing on a land-based pad at Cape Canaveral in December last year.

What is different this time was "the rocket landed instead of putting a hole in the ship or tipping over. So we are really excited about that," said SpaceX founder Elon Musk at a press conference after the landing.

NASA offered a congratulation via Twitter to SpaceX for the successful landing and sending the unmanned Dragon to the orbiting laboratory.

Among the almost 7,000 pounds (3,200 kilograms) of items inside the Dragon spacecraft is the 3,100-pound (1,400-kilogram) Bigelow Expandable Activity Module (BEAM), a $17.8-million project that will be attached to the ISS to test the use of an inflatable space habitat in microgravity.

"It is the future," said Kirk Shireman, manager of NASA's ISS programme. 

"Humans will be using these kinds of modules as we move further and further off the planet and actually as we inhabit low Earth orbit."

According to NASA, inflatable habitats greatly decrease the amount of transport volume at launch for future space missions and take up less room on a rocket, but once set up, provide additional volume for living and working.

Shireman said the company that developed BEAM, Bigelow Aerospace, launched two inflatable modules about 10 years ago using Russian rockets but this will be the first time humans will interact with such a module.

After being attached to the ISS, BEAM will be filled with air to expand it for a two-year test period in which ISS astronauts will conduct a series of tests to validate overall performance and capability of expandable habitats.

BEAM is 5.7 feet (1.7 meters) long and 7.75 feet (2.4 meters) in diameter when packed; 12 feet (3.7 meters) long and 10.5 feet (3.2 meters) in diameter when expanded, with 565 cubic feet (16 cubic meters) of interior volume.

Bigelow Aerospace is also developing a new inflatable module called B330, which is 20 times larger than BEAM, and hopes to put two B330s together in orbit into a private space station in 2020, Robert Bigelow, the company's president, told reporters.

"We are in the early phase of a new kind of spacecraft that offers a lot of promise," Bigelow said.

The cargo also included new experiments that will help investigators study muscle atrophy and bone loss in space, seek insight into the interactions of particle flows at the nanoscale level and use protein crystal growth in microgravity to help design new drugs.

SpaceX is one of two US companies that provide ISS cargo services for NASA. The other company is Orbital ATK, whose Cygnus capsule was launched to the ISS on March 22.

It is the first time that both companies' cargo ships will be docked at the orbiting lab simultaneously.​