PARIS // Scientists in the US reported a further step towards a celebrated "invisibility cloak" by masking a large, free-standing object in three dimensions.
The laboratory work is the latest advance in a scientific frontier that uses novel materials to manipulate light, a trick that is of interest to the military in particular.
Reporting in the New Journal of Physics, researchers at the University of Texas in Austin cloaked an 18-centimetre cylindrical tube from light in the microwave part of the energy spectrum.
Those hoping for a Harry Potter-style touch of wizardry would be disappointed. To the human eye, which can perceive light only in higher frequencies, no invisibility would have been seen.
But, said the researchers, the experiment is important proof of a principle that so-called plasmonic meta-materials can achieve a cloaking effect.
A warplane cloaked with such materials could achieve "super-stealth" status by becoming invisible in all directions to radar microwaves, said the co-lead investigator Andrea Alu.
Plasmonic meta-materials are composites of metal and non-conductive synthetics made of nanometre-sized structures that are far smaller than the wavelength of the light that strikes them.
As a result, when incoming photons hit the material, they excite currents that make the light waves scatter.
The new experiment entailed making a shell of plasmonic meta-materials and placing the cylinder inside, and exposing the combination to microwaves.
Microwaves scattered by the shell ran into microwaves bounced from the object, preventing them from sending a return signal to the viewer.
"When the scattered fields from the cloak and the object interfere, they cancel each other out, and the overall effect is transparency and invisibility at all angles of observations," said Mr Alu.
Any shape of object can be masked, he added.
The cloaking worked best at a microwave frequency of 3.1 gigahertz, said the paper.
The feat is a step forward because other techniques have entailed bending light around two-dimensional objects or, in 3D, masking microscopic bumps on mirrors or reflectors, an approach called "carpet cloaking", said the authors.
The new concept could be modified for visible light, although any cloaked objects would be very small, in the micrometer range, as the plasmonic effect is linked to the wavelength of the light, Mr Alu said in an interview.
Even so, there could be important applications for microwave meta-materials, he said.
"What we are thinking about is not necessarily cloaking the whole warplane but some hot spots, a part such as the tailplane that you would want to cloak because it reflects most of the energy [from microwave radar]."
* Agence France-Presse
The specs
Engine: Dual 180kW and 300kW front and rear motors
Power: 480kW
Torque: 850Nm
Transmission: Single-speed automatic
Price: From Dh359,900 ($98,000)
On sale: Now
Our Time Has Come
Alyssa Ayres, Oxford University Press
Sustainable Development Goals
1. End poverty in all its forms everywhere
2. End hunger, achieve food security and improved nutrition and promote sustainable agriculture
3. Ensure healthy lives and promote well-being for all at all ages
4. Ensure inclusive and equitable quality education and promote lifelong learning opportunities for all
5. Achieve gender equality and empower all women and girls
6. Ensure availability and sustainable management of water and sanitation for all
7. Ensure access to affordable, reliable, sustainable and modern energy for all
8. Promote sustained, inclusive and sustainable economic growth, full and productive employment and decent work for all
9. Build resilient infrastructure, promote inclusive and sustainable industrialisation and foster innovation
10. Reduce inequality within and among countries
11. Make cities and human settlements inclusive, safe, resilient and sustainable
12. Ensure sustainable consumption and production patterns
13. Take urgent action to combat climate change and its effects
14. Conserve and sustainably use the oceans, seas and marine resources for sustainable development
15. Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
16. Promote peaceful and inclusive societies for sustainable development, provide access to justice for all and build effective, accountable and inclusive institutions at all levels
17. Strengthen the means of implementation and revitalise the global partnership for sustainable development
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How to avoid crypto fraud
- Use unique usernames and passwords while enabling multi-factor authentication.
- Use an offline private key, a physical device that requires manual activation, whenever you access your wallet.
- Avoid suspicious social media ads promoting fraudulent schemes.
- Only invest in crypto projects that you fully understand.
- Critically assess whether a project’s promises or returns seem too good to be true.
- Only use reputable platforms that have a track record of strong regulatory compliance.
- Store funds in hardware wallets as opposed to online exchanges.
Mercer, the investment consulting arm of US services company Marsh & McLennan, expects its wealth division to at least double its assets under management (AUM) in the Middle East as wealth in the region continues to grow despite economic headwinds, a company official said.
Mercer Wealth, which globally has $160 billion in AUM, plans to boost its AUM in the region to $2-$3bn in the next 2-3 years from the present $1bn, said Yasir AbuShaban, a Dubai-based principal with Mercer Wealth.
“Within the next two to three years, we are looking at reaching $2 to $3 billion as a conservative estimate and we do see an opportunity to do so,” said Mr AbuShaban.
Mercer does not directly make investments, but allocates clients’ money they have discretion to, to professional asset managers. They also provide advice to clients.
“We have buying power. We can negotiate on their (client’s) behalf with asset managers to provide them lower fees than they otherwise would have to get on their own,” he added.
Mercer Wealth’s clients include sovereign wealth funds, family offices, and insurance companies among others.
From its office in Dubai, Mercer also looks after Africa, India and Turkey, where they also see opportunity for growth.
Wealth creation in Middle East and Africa (MEA) grew 8.5 per cent to $8.1 trillion last year from $7.5tn in 2015, higher than last year’s global average of 6 per cent and the second-highest growth in a region after Asia-Pacific which grew 9.9 per cent, according to consultancy Boston Consulting Group (BCG). In the region, where wealth grew just 1.9 per cent in 2015 compared with 2014, a pickup in oil prices has helped in wealth generation.
BCG is forecasting MEA wealth will rise to $12tn by 2021, growing at an annual average of 8 per cent.
Drivers of wealth generation in the region will be split evenly between new wealth creation and growth of performance of existing assets, according to BCG.
Another general trend in the region is clients’ looking for a comprehensive approach to investing, according to Mr AbuShaban.
“Institutional investors or some of the families are seeing a slowdown in the available capital they have to invest and in that sense they are looking at optimizing the way they manage their portfolios and making sure they are not investing haphazardly and different parts of their investment are working together,” said Mr AbuShaban.
Some clients also have a higher appetite for risk, given the low interest-rate environment that does not provide enough yield for some institutional investors. These clients are keen to invest in illiquid assets, such as private equity and infrastructure.
“What we have seen is a desire for higher returns in what has been a low-return environment specifically in various fixed income or bonds,” he said.
“In this environment, we have seen a de facto increase in the risk that clients are taking in things like illiquid investments, private equity investments, infrastructure and private debt, those kind of investments were higher illiquidity results in incrementally higher returns.”
The Abu Dhabi Investment Authority, one of the largest sovereign wealth funds, said in its 2016 report that has gradually increased its exposure in direct private equity and private credit transactions, mainly in Asian markets and especially in China and India. The authority’s private equity department focused on structured equities owing to “their defensive characteristics.”
DUBAI CARNIVAL RESULTS
6.30pm Handicap US$135,000 (Turf) 2,410m
Winner Dubai Future, Harry Bentley (jockey), Saeed bin Suroor (trainer).
7.05pm UAE 1000 Guineas Listed $250,000 (Dirt) 1,600m
Winner Dubai Love, Patrick Cosgrave, Saeed bin Suroor.
7.40pm Dubai Dash Listed $175,000 (T) 1,000m
Winner: Equilateral, James Doyle, Charles Hills.
8.15pm Al Bastakiya Trial Conditions $100,000 (D) 1.900m
Winner Laser Show, Kevin Stott, Saeed bin Suroor.
8.50pm Al Fahidi Fort Group Two $250,000 (T) 1,400m
Winner Glorious Journey, James Doyle, Charlie Appleby.
9.25pm Handicap $135,000 (D) 2,000m
Winner George Villiers, Tadhg O’Shea, Satish Seemar.
Key facilities
- Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
- Premier League-standard football pitch
- 400m Olympic running track
- NBA-spec basketball court with auditorium
- 600-seat auditorium
- Spaces for historical and cultural exploration
- An elevated football field that doubles as a helipad
- Specialist robotics and science laboratories
- AR and VR-enabled learning centres
- Disruption Lab and Research Centre for developing entrepreneurial skills
SPECS
Engine: Two-litre four-cylinder turbo
Power: 235hp
Torque: 350Nm
Transmission: Nine-speed automatic
Price: From Dh167,500 ($45,000)
On sale: Now
COMPANY PROFILE
Founders: Alhaan Ahmed, Alyina Ahmed and Maximo Tettamanzi
Total funding: Self funded
RESULT
Esperance de Tunis 1 Guadalajara 1
(Esperance won 6-5 on penalties)
Esperance: Belaili 38’
Guadalajara: Sandoval 5’
BOSH!'s pantry essentials
Nutritional yeast
This is Firth's pick and an ingredient he says, "gives you an instant cheesy flavour". He advises making your own cream cheese with it or simply using it to whip up a mac and cheese or wholesome lasagne. It's available in organic and specialist grocery stores across the UAE.
Seeds
"We've got a big jar of mixed seeds in our kitchen," Theasby explains. "That's what you use to make a bolognese or pie or salad: just grab a handful of seeds and sprinkle them over the top. It's a really good way to make sure you're getting your omegas."
Umami flavours
"I could say soya sauce, but I'll say all umami-makers and have them in the same batch," says Firth. He suggests having items such as Marmite, balsamic vinegar and other general, dark, umami-tasting products in your cupboard "to make your bolognese a little bit more 'umptious'".
Onions and garlic
"If you've got them, you can cook basically anything from that base," says Theasby. "These ingredients are so prevalent in every world cuisine and if you've got them in your cupboard, then you know you've got the foundation of a really nice meal."
Your grain of choice
Whether rice, quinoa, pasta or buckwheat, Firth advises always having a stock of your favourite grains in the cupboard. "That you, you have an instant meal and all you have to do is just chuck a bit of veg in."
Race card for Super Saturday
4pm: Al Bastakiya Listed US$250,000 (Dh918,125) (Dirt) 1,900m.
4.35pm: Mahab Al Shimaal Group 3 $200,000 (D) 1,200m.
5.10pm: Nad Al Sheba Conditions $200,000 (Turf) 1,200m.
5.45pm: Burj Nahaar Group 3 $200,000 (D) 1,600m.
6.20pm: Jebel Hatta Group 1 $300,000 (T) 1,800m.
6.55pm: Al Maktoum Challenge Round 3 Group 1 $400,000 (D) 2,000m.
7.30pm: Dubai City of Gold Group 2 $250,000 (T) 2,410m.
How to protect yourself when air quality drops
Install an air filter in your home.
Close your windows and turn on the AC.
Shower or bath after being outside.
Wear a face mask.
Stay indoors when conditions are particularly poor.
If driving, turn your engine off when stationary.
Emergency phone numbers in the UAE
Estijaba – 8001717 – number to call to request coronavirus testing
Ministry of Health and Prevention – 80011111
Dubai Health Authority – 800342 – The number to book a free video or voice consultation with a doctor or connect to a local health centre
Emirates airline – 600555555
Etihad Airways – 600555666
Ambulance – 998
Knowledge and Human Development Authority – 8005432 ext. 4 for Covid-19 queries
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Heather, the Totality
Matthew Weiner,
Canongate
RESULTS
5pm Wathba Stallions Cup Maiden (PA) Dh70,000 (Dirt) 1,400m
Winner Munfared, Fernando Jara (jockey), Ahmed Al Mehairbi (trainer)
5.30pm Handicap (PA) Dh70,000 (D) 1,600m
Winner Sawt Assalam, Szczepan Mazur, Ibrahim Al Hadhrami
6pm Maiden (PA) Dh70,000 (D) 1,800m
Winner Dergham Athbah, Pat Dobbs, Mohamed Daggash
6.30pm Handicap (PA) Dh70,000 (D) 1,800m
Winner Rajee, Fernando Jara, Majed Al Jahouri
7pm Conditions (PA) Dh80,000 (D) 1,800m
Winner Kerless Del Roc, Fernando Jara, Ahmed Al Mehairbi
7.30pm Handicap (TB) Dh70,000 (D) 2,000m
Winner Pharoah King, Pat Dobbs, Doug Watson
8pm Conditions (PA) Dh85,000 (D) 2,000m
Winner Sauternes Al Maury, Dane O’Neill, Doug Watson
The specs
Engine: Direct injection 4-cylinder 1.4-litre
Power: 150hp
Torque: 250Nm
Price: From Dh139,000
On sale: Now
It
Director: Andres Muschietti
Starring: Bill Skarsgard, Jaeden Lieberher, Sophia Lillis, Chosen Jacobs, Jeremy Ray Taylor
Three stars
The specs
Engine: 5.2-litre V10
Power: 640hp at 8,000rpm
Torque: 565Nm at 6,500rpm
Transmission: 7-speed dual-clutch auto
Price: From Dh1 million
On sale: Q3 or Q4 2022
More coverage from the Future Forum
Dubai Bling season three
Cast: Loujain Adada, Zeina Khoury, Farhana Bodi, Ebraheem Al Samadi, Mona Kattan, and couples Safa & Fahad Siddiqui and DJ Bliss & Danya Mohammed
Rating: 1/5
Formula Middle East Calendar (Formula Regional and Formula 4)
Round 1: January 17-19, Yas Marina Circuit – Abu Dhabi
Round 2: January 22-23, Yas Marina Circuit – Abu Dhabi
Round 3: February 7-9, Dubai Autodrome – Dubai
Round 4: February 14-16, Yas Marina Circuit – Abu Dhabi
Round 5: February 25-27, Jeddah Corniche Circuit – Saudi Arabia
About Proto21
Date started: May 2018
Founder: Pir Arkam
Based: Dubai
Sector: Additive manufacturing (aka, 3D printing)
Staff: 18
Funding: Invested, supported and partnered by Joseph Group