A technology company in Dubai has helped to illuminate "an enigma" in the world of physics by uncovering how two types of crystals interact with light.
Scientists at XPANCEO, in Dubai Internet City, collaborated with Prof Kostya Novoselov, a Russian-British academic, to reveal unique properties that could prove useful for diagnosing illnesses such as cancer and developing faster computers.
Prof Novoselov, who works at the University of Manchester in the UK and the National University of Singapore, won the 2010 Nobel Prize in Physics for work on graphene, a type of carbon in which the atoms are arranged in a hexagonal shape.
This discovery allows you to manipulate light, not by changing the material itself, but by changing the properties of the light
Dr Valentyn Volkov,
XPANCEO co-founder
Published in the Nature Communications journal on Wednesday, his latest research concerns crystals of two chemicals called rhenium diselenide and rhenium disulfide.
While graphene is known for its remarkable strength and lightness – it is much stronger than steel, but lighter than aluminium – the two substances analysed in the new study are notable because of how they interact with light.
"It required a lot of effort from the theory and experimental part," said Dr Valentyn Volkov, co-founder of XPANCEO and one of the authors of the study.
"There’s a big difference between this and traditional layered crystals. It was clear that this unusual and unique material should possess properties which are not very usual for solid optical materials. That was our main motivation – to dig in this direction and see what surprises came out."
Most layered crystals are symmetrical, so in all directions – in three dimensions – they are the same.
Breaking new ground
The two substances described in the latest study are notable because they are asymmetrical, so the position of atoms in all three dimensions is different. Such crystals are called triclinic.
The researchers aimed to find out what effects this asymmetry has on how the crystals interact with light.
"Before we started experiments, we usually study the scientific literature to know what’s already been done," Dr Volkov said.
"It was clear that this field was a kind of enigma. People didn’t really try to investigate these triclinic materials with high precision. Nothing was really done in this field."
What makes the properties of the crystals unique is that if the wavelength of light shone on them is changed, the direction in which the light spreads is deflected within the crystal. This is, Dr Volkov said, an "absolutely unique" property.
What next?
It could be useful in areas of technology including electronics, where light is used to send energy and information.
Light is a particularly good medium for sending energy or information, Dr Volkov said, because, unlike electrons, light does not have any mass.
"This discovery allows you to manipulate light not by changing the material itself, but by changing the properties of the light," he said. "It’s an additional level of freedom and opens up new and unique possibilities for making compact and novel optoelectronic devices.
"Our human species is always looking for new methods to control light. These new materials are already a significant step towards new mechanisms to control light."
The crystals could be used to help develop more powerful, heat-resistant computers for areas such as machine learning or artificial intelligence.
Another potential application is in the development of biochemical sensors to detect viruses or diseases including cancer at an earlier stage. They could also be used to develop cheaper and more accurate blood tests.
The study is co-written by eight of Dr Volkov’s colleagues at XPANCEO, along with researchers in Singapore, Spain and Switzerland.
The research by XPANCEO on rhenium diselenide and rhenium disulfide ties in with the company’s work to develop smart contact lenses that, the company said, can be used for a variety of applications, extending even to monitoring a person’s health.
Conflict, drought, famine
Estimates of the number of deaths caused by the famine range from 400,000 to 1 million, according to a document prepared for the UK House of Lords in 2024.
It has been claimed that the policies of the Ethiopian government, which took control after deposing Emperor Haile Selassie in a military-led revolution in 1974, contributed to the scale of the famine.
Dr Miriam Bradley, senior lecturer in humanitarian studies at the University of Manchester, has argued that, by the early 1980s, “several government policies combined to cause, rather than prevent, a famine which lasted from 1983 to 1985. Mengistu’s government imposed Stalinist-model agricultural policies involving forced collectivisation and villagisation [relocation of communities into planned villages].
The West became aware of the catastrophe through a series of BBC News reports by journalist Michael Buerk in October 1984 describing a “biblical famine” and containing graphic images of thousands of people, including children, facing starvation.
Band Aid
Bob Geldof, singer with the Irish rock group The Boomtown Rats, formed Band Aid in response to the horrific images shown in the news broadcasts.
With Midge Ure of the band Ultravox, he wrote the hit charity single Do They Know it’s Christmas in December 1984, featuring a string of high-profile musicians.
Following the single’s success, the idea to stage a rock concert evolved.
Live Aid was a series of simultaneous concerts that took place at Wembley Stadium in London, John F Kennedy Stadium in Philadelphia, the US, and at various other venues across the world.
The combined event was broadcast to an estimated worldwide audience of 1.5 billion.
The biog
Name: Salem Alkarbi
Age: 32
Favourite Al Wasl player: Alexandre Oliveira
First started supporting Al Wasl: 7
Biggest rival: Al Nasr
UAE currency: the story behind the money in your pockets
Ticket prices
General admission Dh295 (under-three free)
Buy a four-person Family & Friends ticket and pay for only three tickets, so the fourth family member is free
Buy tickets at: wbworldabudhabi.com/en/tickets
Fines for littering
In Dubai:
Dh200 for littering or spitting in the Dubai Metro
Dh500 for throwing cigarette butts or chewing gum on the floor, or littering from a vehicle.
Dh1,000 for littering on a beach, spitting in public places, throwing a cigarette butt from a vehicle
In Sharjah and other emirates
Dh500 for littering - including cigarette butts and chewing gum - in public places and beaches in Sharjah
Dh2,000 for littering in Sharjah deserts
Dh500 for littering from a vehicle in Ras Al Khaimah
Dh1,000 for littering from a car in Abu Dhabi
Dh1,000 to Dh100,000 for dumping waste in residential or public areas in Al Ain
Dh10,000 for littering at Ajman's beaches
The specS: 2018 Toyota Camry
Price: base / as tested: Dh91,000 / Dh114,000
Engine: 3.5-litre V6
Gearbox: Eight-speed automatic
Power: 298hp @ 6,600rpm
Torque: 356Nm @ 4,700rpm
Fuel economy, combined: 7.0L / 100km
Mica
Director: Ismael Ferroukhi
Stars: Zakaria Inan, Sabrina Ouazani
3 stars
How to keep control of your emotions
If your investment decisions are being dictated by emotions such as fear, greed, hope, frustration and boredom, it is time for a rethink, Chris Beauchamp, chief market analyst at online trading platform IG, says.
Greed
Greedy investors trade beyond their means, open more positions than usual or hold on to positions too long to chase an even greater gain. “All too often, they incur a heavy loss and may even wipe out the profit already made.
Tip: Ignore the short-term hype, noise and froth and invest for the long-term plan, based on sound fundamentals.
Fear
The risk of making a loss can cloud decision-making. “This can cause you to close out a position too early, or miss out on a profit by being too afraid to open a trade,” he says.
Tip: Start with a plan, and stick to it. For added security, consider placing stops to reduce any losses and limits to lock in profits.
Hope
While all traders need hope to start trading, excessive optimism can backfire. Too many traders hold on to a losing trade because they believe that it will reverse its trend and become profitable.
Tip: Set realistic goals. Be happy with what you have earned, rather than frustrated by what you could have earned.
Frustration
Traders can get annoyed when the markets have behaved in unexpected ways and generates losses or fails to deliver anticipated gains.
Tip: Accept in advance that asset price movements are completely unpredictable and you will suffer losses at some point. These can be managed, say, by attaching stops and limits to your trades.
Boredom
Too many investors buy and sell because they want something to do. They are trading as entertainment, rather than in the hope of making money. As well as making bad decisions, the extra dealing charges eat into returns.
Tip: Open an online demo account and get your thrills without risking real money.
What are the GCSE grade equivalents?
- Grade 9 = above an A*
- Grade 8 = between grades A* and A
- Grade 7 = grade A
- Grade 6 = just above a grade B
- Grade 5 = between grades B and C
- Grade 4 = grade C
- Grade 3 = between grades D and E
- Grade 2 = between grades E and F
- Grade 1 = between grades F and G
MATCH INFO
Jersey 147 (20 overs)
UAE 112 (19.2 overs)
Jersey win by 35 runs
UAE currency: the story behind the money in your pockets
THREE
%3Cp%3EDirector%3A%20Nayla%20Al%20Khaja%3C%2Fp%3E%0A%3Cp%3EStarring%3A%20Jefferson%20Hall%2C%20Faten%20Ahmed%2C%20Noura%20Alabed%2C%20Saud%20Alzarooni%3C%2Fp%3E%0A%3Cp%3ERating%3A%203.5%2F5%3C%2Fp%3E%0A
Red flags
- Promises of high, fixed or 'guaranteed' returns.
- Unregulated structured products or complex investments often used to bypass traditional safeguards.
- Lack of clear information, vague language, no access to audited financials.
- Overseas companies targeting investors in other jurisdictions - this can make legal recovery difficult.
- Hard-selling tactics - creating urgency, offering 'exclusive' deals.
Courtesy: Carol Glynn, founder of Conscious Finance Coaching
UPI facts
More than 2.2 million Indian tourists arrived in UAE in 2023
More than 3.5 million Indians reside in UAE
Indian tourists can make purchases in UAE using rupee accounts in India through QR-code-based UPI real-time payment systems
Indian residents in UAE can use their non-resident NRO and NRE accounts held in Indian banks linked to a UAE mobile number for UPI transactions
The Sand Castle
Director: Matty Brown
Stars: Nadine Labaki, Ziad Bakri, Zain Al Rafeea, Riman Al Rafeea
Rating: 2.5/5
UAE currency: the story behind the money in your pockets
Read more about the coronavirus
COMPANY PROFILE
Name: Mamo Year it started: 2019 Founders: Imad Gharazeddine, Asim Janjua Based: Dubai, UAE Number of employees: 28 Sector: Financial services Investment: $9.5m Funding stage: Pre-Series A Investors: Global Ventures, GFC, 4DX Ventures, AlRajhi Partners, Olive Tree Capital, and prominent Silicon Valley investors. The%20specs
%3Cp%3E%3Cstrong%3EEngine%3A%3C%2Fstrong%3E%201.8-litre%204-cyl%20turbo%0D%3Cbr%3E%3Cstrong%3EPower%3A%20%3C%2Fstrong%3E190hp%20at%205%2C200rpm%0D%3Cbr%3E%3Cstrong%3ETorque%3A%3C%2Fstrong%3E%20320Nm%20from%201%2C800-5%2C000rpm%0D%3Cbr%3E%3Cstrong%3ETransmission%3A%20%3C%2Fstrong%3ESeven-speed%20dual-clutch%20auto%0D%3Cbr%3E%3Cstrong%3EFuel%20consumption%3A%3C%2Fstrong%3E%206.7L%2F100km%0D%3Cbr%3E%3Cstrong%3EPrice%3A%3C%2Fstrong%3E%20From%20Dh111%2C195%0D%3Cbr%3E%3Cstrong%3EOn%20sale%3A%20%3C%2Fstrong%3ENow%3C%2Fp%3E%0A
The specs
Common to all models unless otherwise stated
Engine: 4-cylinder 2-litre T-GDi
0-100kph: 5.3 seconds (Elantra); 5.5 seconds (Kona); 6.1 seconds (Veloster)
Power: 276hp
Torque: 392Nm
Transmission: 6-Speed Manual/ 8-Speed Dual Clutch FWD
Price: TBC
The Perfect Couple
Starring: Nicole Kidman, Liev Schreiber, Jack Reynor
Creator: Jenna Lamia
Rating: 3/5
'Of Love & War'
Lynsey Addario, Penguin Press
MATCH INFO
Al Jazira 3 (O Abdulrahman 43', Kenno 82', Mabkhout 90 4')
Al Ain 1 (Laba 39')
Red cards: Bandar Al Ahbabi (Al Ain)
FIGHT CARD
Welterweight Mostafa Radi (PAL) v Tohir Zhuraev (TJK)
Catchweight 75kg Leandro Martins (BRA) v Anas Siraj Mounir (MAR)
Flyweight Corinne Laframboise (CAN) v Manon Fiorot (FRA)
Featherweight Ahmed Al Darmaki (UAE) v Bogdan Kirilenko (UZB)
Lightweight Izzedine Al Derabani (JOR) v Atabek Abdimitalipov (KYG)
Featherweight Yousef Al Housani (UAE) v Mohamed Arsharq Ali (SLA)
Catchweight 69kg Jung Han-gook (KOR) v Elias Boudegzdame (ALG)
Catchweight 71kg Usman Nurmagomedov (RUS) v Jerry Kvarnstrom (FIN)
Featherweight title Lee Do-gyeom (KOR) v Alexandru Chitoran (ROU)
Lightweight title Bruno Machado (BRA) v Mike Santiago (USA)
The five pillars of Islam
1. Fasting
2. Prayer
3. Hajj
4. Shahada
5. Zakat
Most sought after workplace benefits in the UAE
- Flexible work arrangements
- Pension support
- Mental well-being assistance
- Insurance coverage for optical, dental, alternative medicine, cancer screening
- Financial well-being incentives
BIRD%20BOX%20BARCELONA
%3Cp%3E%3Cstrong%3EDirectors%3A%3C%2Fstrong%3E%20David%20and%20Alex%20Pastor%3Cbr%3E%3Cstrong%3EStars%3A%20%3C%2Fstrong%3EGeorgina%20Campbell%2C%20Mario%20Casas%2C%20Diego%20Calva%3Cbr%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%202%2F5%3C%2Fp%3E%0A
Ms Yang's top tips for parents new to the UAE
- Join parent networks
- Look beyond school fees
- Keep an open mind
US households add $601bn of debt in 2019
American households borrowed another $601 billion (Dh2.2bn) in 2019, the largest yearly gain since 2007, just before the global financial crisis, according to February data from the New York Federal Reserve Bank.
Fuelled by rising mortgage debt as homebuyers continued to take advantage of low interest rates, the increase last year brought total household debt to a record high, surpassing the previous peak reached in 2008 just before the market crash, according to the report.
Following the 22nd straight quarter of growth, American household debt swelled to $14.15 trillion by the end of 2019, the New York Fed said in its quarterly report.
In the final three months of the year, new home loans jumped to their highest volume since the fourth quarter of 2005, while credit cards and auto loans also added to the increase.
The bad debt load is taking its toll on some households, and the New York Fed warned that more and more credit card borrowers — particularly young people — were falling behind on their payments.
"Younger borrowers, who are disproportionately likely to have credit cards and student loans as their primary form of debt, struggle more than others with on-time repayment," New York Fed researchers said.
