SYDNEY — A device that absorbs water from air to produce drinkable water was officially launched in Australia Wednesday.

Researchers say the so-called Hydro Harvester, capable of producing up to 1,000 liters of drinkable water a day, could be “lifesaving during drought or emergencies.”

The device absorbs water from the atmosphere. Solar energy or heat that is harnessed from, for example, industrial processes are used to generate hot, humid air. That is then allowed to cool, producing water for drinking or irrigation.

The Australian team said that unlike other commercially available atmospheric water generators, their invention works by heating air instead of cooling it.

Laureate Professor Behdad Moghtaderi, a chemical engineer and director of the University of Newcastle’s Centre for Innovative Energy Technologies, told VOA how the technology operates.  

“Hydro Harvester uses an absorbing material to absorb and dissolve moisture from air. So essentially, we use renewable energy, let’s say, for instance, solar energy or waste heat. We basically produce super saturated, hot, humid air out of the system,” Moghtaderi said. “When you condense water contained in that air you would have the drinking water at your disposal.”

The researchers say the device can produce enough drinking water each day to sustain a small rural town of up to 400 people. It could also help farmers keep livestock alive during droughts.

Moghtaderi says the technology could be used in parts of the world where water is scarce.

Researchers were motivated by the fact that Australia is an arid and dry country.

“More than 2 billion people around the world, they are in a similar situation where they do not have access to, sort of, high-quality water and they deal with water scarcity,” Moghtaderi said

Trials of the technology will be conducted in several remote Australian communities this year.

The World Economic Forum, an international research organization, says “water scarcity continues to be a pervasive global challenge.”

It believes that atmospheric water generation technology is a “promising emergency solution that can immediately generate drinkable water using moisture in the air.”

However, it cautions that generally the technology is not cheap, and estimates that one mid-sized commercial unit can cost between $30,000 and $50,000.

 
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SYDNEY — Researchers in Australia and the United States say that a new artificial intelligence tool has allowed them to classify brain tumors more quickly and accurately.  

The current method for identifying different kinds of brain tumors, while accurate, can take several weeks to produce results.  The method, called DNA methylation-based profiling, is not available at many hospitals around the world.

To address these challenges, a research team from the Australian National University, in collaboration with the National Cancer Institute in the United States, has developed a way to predict DNA methylation, which acts like a switch to control gene activity.  

This allows them to classify brain tumors into 10 major categories using a deep learning model.

This is a branch of artificial intelligence that teaches computers to process data in a way that is inspired by a human brain.

The joint U.S.-Australian system is called DEPLOY and uses microscopic pictures of a patient’s tissue called histopathology images.

The researchers see the DEPLOY technology as complementary to an initial diagnosis by a pathologist or physician.

Danh-Tai Hoang, a research fellow at the Australian National University, told VOA that AI will enhance current diagnostic methods that can often be slow.

“The technique is very time consuming,” Hoang said. “It is often around two to three weeks to obtain a result from the test, whereas patients with high-grade brain tumors often require treatment as soon as possible because time is the goal for brain tumor(s), so they need to get treatment as soon as possible.”

The research team said its AI model was validated on large datasets of approximately 4,000 patients from across the United States and Europe and an accuracy rate of 95 percent.

Their study has been published in the journal Nature Medicine.
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