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Prof Xiulin Ruan with his whitest ever white paint
Prof Xiulin Ruan with a sample of his “ultra-white” paint

Scientists in the US have developed a paint significantly “whiter than the whitest paint currently available”.

Tests carried out by researchers at Purdue University on their “ultra-white” paint showed it reflected more than 98% of sunlight.

That suggests, the scientists say, that it could help save energy and fight climate change.

Painting “cool roofs” white is an energy-saving approach already being rolled out in some major cities.

Commercially available white paints reflect between 80% and 90% of sunlight, according to lead researcher Prof Xiulin Ruan from Purdue, in West Lafayette, Indiana. “It’s a big deal, because every 1% of reflectance you get translates to 10 watts per metre squared less heat from the Sun,” he explained.

People in West New York, New Jersey watch the sun set on New York, August 23, 2015.
The city of New York has embraced “cool roofs” as a climate solution

“So if you were to use our paint to cover a roof area of about 1,000 sq ft (93 sq m), we estimate you could get a cooling power of 10 kilowatts. That’s more powerful than the central air conditioners used by most houses,” he said.

Could white paint help fight climate change?

“Cool” white roofs are seen as an easy, urban climate solution.

In the US, New York has recently coated more than 10 million sq ft of rooftops white. The state of California has already updated building codes to promote cool roofs.

Their benefits are still being investigated, but studies have shown they can reduce energy demands and create lower ambient temperatures. That has the added benefit of reducing the amount of water used for irrigation in cities.

IR image of whitest white paint
An infrared camera (right image) shows how a sample of the whitest white paint (the dark purple square in the middle) cools the board below ambient temperature

“We did a very rough calculation,” said Prof Ruan. “And we estimate we would only need to paint 1% of the Earth’s surface with this paint – perhaps an area where no people live that is covered in rocks – and that could help fight the climate change trend.”

How was this paint made ‘ultra-white’?

The new paint contains a compound called barium sulfate, which is also used to make photo paper and cosmetics.

“We used a very high concentration of the compound particles,” explained Prof Ruan. “And we use lots of different sizes of particles, because sunlight has different colours at the different wavelength.”

How much each particle scatters light depends on its size, “so we deliberately used different particle sizes to scatter each wavelength”.

Can anyone buy this paint?

The researchers are now working with a company to produce and sell their paint, which they say should be similar in cost to currently available paints.

“I already had an inquiry from a museum that wants to put up a display of our whitest white paint side by side with the blackest black,” said Prof Ruan.

That ultra-black coating is a material scientists developed in 2014, called Vantablack.

Scientist with sample of Vantablack in the lab

It absorbs almost all light, so its potential uses are almost the opposite of the “ultra-white” paint. Vantablack, used in space telescopes, for example, could absorb stray light that might interfere with their ability to measure light from objects in deep space.

But Vantablack, which is a coating of nanoscale carbon tubes, is not available to everyone. Its invention led to an artistic controversy when sculptor and former Turner prize-winning artist, Anish Kapoor, bought the exclusive rights to its “use as an art material”.

In response, UK-based artist Stuart Semple created a pigment that he claimed to be the world’s “pinkest pink” and made it available to purchase on his website for “everyone but Anish Kapoor”.

Vantablack-coated mask
Vantablack absorbs so much light that it makes surfaces appear completely flat

Vantablack’s developers, a company called Surrey NanoSystems, said the exclusivity deal with Mr Kapoor would not preclude the whitest white being displayed alongside the blackest black in a museum. “That isn’t art; we would see it as an educational display for people interested in the science and technology behind extremes of light and darkness,” the company told BBC News.

Prof Ruan added that it would be up to the company that produces the “ultra-white” paint, but he hoped it would be available to everyone.

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Foreign

Israel’s War On Gaza: List of Key Events, Day 101

Published

3 years ago

on

15th January 2024

By

Israel's war on Gaza: List of key events, day 101 | Israel War on Gaza News | Al Jazeera

Dozens of Palestinians killed in overnight Israeli strikes in central and south Gaza as Red Sea tensions rise.

Here’s how things stand on Monday, January 15, 2024:

Latest updates and human impact

  • Israeli attacks continue unabated overnight killing and wounding dozens of civilians in central and southern Gaza. At least 22 people were killed and a large number injured as a result of Israeli forces targeting al-Thalatheni Street in the central Gaza Strip.
  • Yemen’s Houthi rebels fired an antiship cruise missile toward an American destroyer in the Red Sea, which was shot down by a US fighter jet, announced US Central Command (CENTCOM) on X.
  • This was the first US-acknowledged Houthi attack since the US strikes on Yemen on Friday.
  • Hamas released a 37-second video showing three Israeli captives held in Gaza on Sunday, saying they would reveal the fate of the captives on Monday and urging the Israeli government to stop the offensive.
  • The Israeli military says it has shifted to a new phase of the war focused on the southern end of Gaza, where almost 2 million internally displaced Palestinians are running out of safe spaces to shelter.
  • The Gaza Ministry of Health has said almost 24,000 people have been killed in the Israeli offensive. More than 60,000 people have been wounded in 100 days of war.

Diplomacy

  • Israeli Prime Minister Benjamin Netanyahu said on Sunday that his country will pursue its war against Hamas until victory and will not be stopped by anyone, including the International Court of Justice (ICJ).
  • The White House said on Sunday that “it’s the right time” for Israel to scale back its military offensive in the Gaza Strip.
  • Egypt’s State Information Service (SIS) said in a statement on Sunday that one of the biggest obstacles to the timely delivery of sufficient aid to Gaza was Israeli inspection of the aid. The statement came after Israel blamed Cairo for the delay in aid delivery to Gaza during its defence at the ICJ.
  • US Secretary of State Antony Blinken posted on X on Monday, calling for the release of the remaining captives held in Gaza on the 100th day since they were taken by Hamas. He did not mention the Palestinian casualties.
  • Australia’s Foreign Minister Penny Wong, who described herself as a “friend of Israel” to the press, will travel to Jordan, Israel, the occupied Palestinian Territories and the United Arab Emirates this week, her office said on Monday.

West Bank raids and violence

  • Israeli forces arrested 25 students staging a sit-in in protest against high tuition fees at An-Najah University in Nablus. Al Jazeera’s Hamdah Salhut reported that the protesting students received a text message from Israeli forces telling them to “surrender now”.
  • Israeli forces have reportedly raided the family home of Nael al-Barghouti, the longest-serving Palestinian prisoner, in the village of Kobar, in Ramallah, in the occupied West Bank.
  • The Israeli army said on Friday that it killed three Palestinian men who infiltrated a West Bank settlement and fired upon soldiers.
  • The Israeli military killed two Palestinians after accusing them of ramming their car through a checkpoint near Hebron.
  • Local sources reported that Israeli forces bulldozed two Palestinian-owned houses during a Sunday midnight raid in the city of Qalqilya, Palestinian news agency Wafa reported.
  • Armed Israeli settlers broke into the village of Burin, south of Nablus, and attacked Palestinian residents’ houses and properties after midnight on Sunday, Wafa reported.
  • “Violent raids and arrests have become part of the fabric of daily life in the occupied West Bank,” Al Jazeera’s Mohammed Jamjoom, reporting from Ramallah in the occupied West Bank, said. At least 347 Palestinians have been killed and thousands have been arrested since October 7.

 

SOURCE: AL JAZEERA AND NEWS AGENCIES
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Hamas Says Will Kill Hostages if Israeli Attacks On Gaza Civilians Continue

Published

3 years ago

on

10th October 2023

By

Flames and smoke billow during Israeli attacks against Gaza on October 9, 2023

Human Rights Watch terms Israeli Defence Minister Yoav Gallant’s call for a ‘complete siege’ on Gaza a ‘war crime’.

The Hamas movement has threatened to kill an Israeli hostage every time Israel bombs a Palestinian home without warning as Israel mobilised some 300,000 reservists and imposed a total blockade of the Gaza Strip, denying the enclave’s millions of residents access to food, water and fuel.

The warning from Hamas came on Monday as the death toll from the armed group’s surprise weekend attack climbed to 900 in Israel and revenge attacks by Israeli forces on the besieged Gaza Strip killed more than 700 people and left some 3,700 others wounded.

Residential apartment blocks, hospitals, schools and a mosque have been among the sites attacked by Israeli fighter jets, artillery and drones, according to media reports and witnesses.

Hamas spokesperson Abu Ubaida issued the threat to kill Israelis from the dozens held captive by the armed group. He said an Israeli hostage would be killed for every Israeli bombing of a civilian house without warning.

Israeli Foreign Minister Eli Cohen said more than 100 people were taken captive by Hamas during the deadly cross-border incursion over the weekend.

As Israeli forces conducted intense retaliatory attacks on Gaza on Monday, Israel’s Defence Minister Yoav Gallant drew international condemnation by announcing a total blockade of the densely populated and besieged enclave, which is home to 2.3 million people.

Gallant said Israel would impose a “complete siege” on Gaza. “No electricity, no food, no water, no gas – it’s all closed.”

United Nations Secretary-General Antonio Guterres said he was “deeply distressed” by the siege announcement and warned that Gaza’s already dire humanitarian situation will now “only deteriorate exponentially”.

A mourner carries the body of Palestinian boy Saad Lubbad, who health officials said was killed in Israeli strikes, during his funeral in Rafah, in the southern Gaza Strip, October 9, 2023. REUTERS/Ibraheem Abu Mustafa
A mourner carries the body of Palestinian boy Saad Lubbad, who health officials said was killed in an Israeli attack, during his funeral in Rafah, in the southern Gaza Strip, on October 9, 2023 [Ibraheem Abu Mustafa/Reuters]

Guterres also said some 137,000 people were taking shelter with the UN Relief and Works Agency for Palestinian Refugees (UNRWA) at schools across Gaza.

UNRWA said on Tuesday that almost 190,000 people have been displaced in Gaza amid the Israeli attacks and the figure is expected to grow further as the violence intensifies.

Nearly half a million people have also not received food rations this week in Gaza as UN food distribution centres have been forced to remain closed amid the Israeli onslaught, UNRWA said.

Human Rights Watch said Israel’s total blockade on the necessities of life for everyday people in Gaza was a war crime.

“Defense Minister Gallant’s statements are abhorrent,” Omar Shakir, Israel and Palestine director at Human Rights Watch, said in a statement.

“Depriving the population in an occupied territory of food and electricity is collective punishment, which is a war crime, as is using starvation as a weapon of war. The International Criminal Court should take note of this call to commit a war crime,” he said.

Shakir also condemned the threat by Hamas to kill hostages, warning that such action was also a war crime.

“All hostages should be safely released to their families,” he said.

On the diplomatic front, Egyptian President Abdel Fattah el-Sisi and his Turkish counterpart Recep Tayyip Erdogan called on Hamas and Israel to immediately end violence and protect civilians, the Egyptian presidency said.

Erdogan urged Israel against “indiscriminately” attacking civilians and delivered measured criticism of Hamas, urging both sides to respect the “ethics” of war.

The United Kingdom, French, German, Italian and US governments issued a joint statement on Monday recognising the “legitimate aspirations” of the Palestinian people and supporting equal measures of justice and freedom for Israelis and Palestinians alike.

INTERACTIVE_DEATH_TOLL_INJURED_ISRAEL_PALESTINE_OCT10_2023_0415
They said they would remain “united and coordinated” to ensure Israel can defend itself.

But the prospect that fighting could spread also alarmed the region and the world.

Lebanese armed group Hezbollah fired rockets into northern Israel in response to at least three of its members being killed in Israeli shelling of Lebanon.

Israel said one of its deputy commanders was also killed in an earlier cross-border raid from Lebanon.

SOURCE: AL JAZEERA AND NEWS AGENCIES

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Western Leaders Accused of Hypocrisy Over Response To Palestine, Ukraine

Published

3 years ago

on

10th October 2023

By

US President Joe Biden holds a bilateral meeting with Israeli Prime Minister Benjamin Netanyahu on the sidelines of the 78th United Nations General Assembly in New York City, the US, September 20, 2023

Social media users, including journalists and observers, are calling out what they call a ‘double standard’.

After Saturday’s surprise attack by the Palestinian group Hamas on Israel, Ukrainian President Volodymyr Zelenskyy took to the social media platform X to offer “condolences go out to everyone who lost relatives or close ones in the terrorist attack”.

He also stated, “Israel’s right to self-defence is unquestionable.”

Many world leaders, including US President Joe Biden and UK Prime Minister Rishi Sunak, shared similar sentiments.

European Commission President Ursula von der Leyen stated, “Israel has the right to defend itself – today and in the days to come. The European Union stands with Israel.”

Accusations of Western ‘double standards’

Some social media users have criticised these statements, saying they highlight a double standard.

Ukraine’s right to defend itself is praised by most international leaders while Russia’s invasion is condemned, but commentators said the same cannot be said about Israel’s occupation of the West Bank and Gaza.

Aaron Bastani, a leftist British journalist, said on X that there’s a “clear double standard in endorsing terrorism against civilian targets in Ukraine … and condemning it by Palestinians”.

Many users said Western diplomats and media support the Ukrainians who defend their land, but label the Palestinians fighting against Israel as “terrorists”.

https://twitter.com/KhaledBeydoun/status/1710787817415082349?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1710787817415082349%7Ctwgr%5E6acf829869e993177f32aa38aa48c02f38cb7f61%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.aljazeera.com%2Fnews%2F2023%2F10%2F9%2Fwestern-leaders-accused-of-hypocrisy-over-response-to-palestine-ukraine

An illustration of a woman’s face, in which one eye is closed beside a Palestinian flag, and one eye open beside a Ukrainian flag, has been regularly shared as a symbol of the West’s alleged double standards in how the two conflicts are viewed.

https://twitter.com/OnlinePalEng/status/1710994682883273172?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1710994682883273172%7Ctwgr%5E6acf829869e993177f32aa38aa48c02f38cb7f61%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.aljazeera.com%2Fnews%2F2023%2F10%2F9%2Fwestern-leaders-accused-of-hypocrisy-over-response-to-palestine-ukraine

Clips also emerged on social media from a CNN interview with Mustafa Barghouti, the general secretary of the Palestinian National Initiative, in which he posed the rhetorical question, “Why does the United States support Ukraine in fighting occupation – while here they support the occupier, who continues to occupy us?”

It is not the first time Western nations have been accused of double standards in their stance on the Ukraine war.

Earlier in the year, Amnesty International published a report highlighting the West’s “double standards” on global human rights.

Agnes Callamard, Amnesty’s secretary-general, told Al Jazeera at the time that the occupation of Palestinian territory was a “particularly important one”.

“Without making any comparison between Russia’s aggression and Israel … it is clear the Palestinian people are under a regime of oppression – a regime of occupation and a regime of apartheid,” Callamard told Al Jazeera.

Over the last three days, X users recirculated earlier statements calling out what they called Western hypocrisy, sharing video by the Irish lawmaker Richard Boyd Barrett from March 2022 in which he berated the Irish government’s double standards regarding Ukraine and Palestine:

“You’re happy to use the most strong and robust language to describe the crimes against humanity of [Russian President] Vladimir Putin, but you will not use the same strength of language when it comes to describing Israel’s treatment of the Palestinians.”

Barrett on Sunday again called out what he described as “shocking double standards of Western leaders supporting Ukraine resistance but condemning Palestinian[s].”

Meanwhile, others warned against comparing conflicts.

https://twitter.com/denfordauthor/status/1710993737738768607?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1710993737738768607%7Ctwgr%5E6acf829869e993177f32aa38aa48c02f38cb7f61%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.aljazeera.com%2Fnews%2F2023%2F10%2F9%2Fwestern-leaders-accused-of-hypocrisy-over-response-to-palestine-ukraine

And some cautioned that Hamas and the Palestinians should not be seen as one and the same.

Ukrainian footballer Oleksandr Zinchenko, who plays for Arsenal, posted on Instagram, stating he “stands with Israel”.

Zinchenko has been a vocal supporter of his home country in its ongoing defence against Russia, and he participated in a Game4Ukraine charity match in London earlier this year to raise money for Ukraine.

After online backlash, with some questioning an alleged double standard in his support of Israel, the footballer removed the post and switched his social media account to private.

Several people claimed that Zinchenko’s football club, in not responding to his comments, was guilty of hypocrisy after they had distanced themselves from former player Mesut Ozil’s comments in 2019 over alleged human rights abuses against Uighur Muslims in China.

SOURCE: AL JAZEERA
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