
Wednesday, 26 February 2025
AI regulation around the world

Tuesday, 28 January 2025
AI can add $4.4 trillion to global economy, but digital divide must be removed: WEF report
Monday, 16 December 2024
New drone for mapping radiation in nuclear plants

Saturday, 21 September 2024
India moving in right direction to become global chip hub: Industry players

Friday, 19 July 2024
5 game-changing photography trends
Friday, 12 July 2024
Man Injured in Work Accident Gets 3D-Printed Fingers – A Glove That Gives His Life Back



Tuesday, 9 July 2024
Teens and screens
Thursday, 23 May 2024
What is air turbulence?

You probably know the feeling: you’re sitting on a plane, happily cruising through the sky, when suddenly the seat-belt light comes on and things get a little bumpy.
Most of the time, turbulence leads to nothing worse than momentary jitters or perhaps a spilled cup of coffee. In rare cases, passengers or flight attendants might end up with some injuries.
What’s going on here? Why are flights usually so stable, but sometimes get so unsteady?
As a meteorologist and atmospheric scientist who studies air turbulence, let me explain.
What is air turbulence?
Air turbulence is when the air starts to flow in a chaotic or random way.
At high altitudes the wind usually moves in a smooth, horizontal current called “laminar flow”. This provides ideal conditions for steady flight.

Turbulence occurs when something disrupts this smooth flow, and the air starts to move up and down as well as horizontally. When this happens, conditions can change from moment to moment and place to place.
You can think of normal flying conditions as the glassy surface of the ocean on a still day. But when a wind comes up, things get choppy, or waves form and break – that’s turbulence.
What causes air turbulence?
The kind of turbulence that affects commercial passenger flights has three main causes.
The first is thunderstorms. Inside a thunderstorm, there is strong up-and-down air movement, which makes a lot of turbulence that can spread out to the surrounding region. Thunderstorms can also create “atmospheric waves”, which travel through the surrounding air and eventually break, causing turbulence.
Fortunately, pilots can usually see thunderstorms ahead (either with the naked eye or on radar) and will make efforts to go around them.
The other common causes of turbulence create what’s typically called “clear-air turbulence”. It comes out of air that looks perfectly clear, with no clouds, so it’s harder to dodge.

The second cause of turbulence is jet streams. These are high-speed winds in the upper atmosphere, at the kind of altitudes where passenger jets fly.
While air inside the jet stream moves quite smoothly, there is often turbulence near the top and bottom of the stream. That’s because there is a big difference in air speed (called “wind shear”) between the jet stream and the air outside it. High levels of wind shear create turbulence.
The third thing that makes turbulence is mountains. As air flows over a mountain range, it creates another kind of wave – called, of course, a “mountain wave” – that disrupts air flow and can create turbulence.
Can air turbulence be avoided?
Pilots do their best to avoid air turbulence – and they’re pretty good at it!
As mentioned, thunderstorms are the easiest to fly around. For clear-air turbulence, things are a little trickier.
When pilots encounter turbulence, they will change altitude to try to avoid it. They also report the turbulence to air traffic controllers, who pass the information on to other flights in the area so they can try to avoid it.
Weather forecasting centres also provide turbulence forecasts. Based on their models of what’s happening in the atmosphere, they can predict where and when clear-air turbulence is likely to occur.
Will climate change make turbulence worse?
As the globe warms and the climate changes in coming decades, we think air turbulence will also be affected.
One reason is that the jet streams which can cause turbulence are shifting and may become more intense. As Earth’s tropical climate zones spread away from the equator, the jet streams are moving with them.
This is likely to increase turbulence on at least some flight routes. Some studies also suggest the wind shear around jet streams has become more intense.
Another reason is that the most severe thunderstorms are also likely to become more intense, partly because a warmer atmosphere can hold more water vapour. This too is likely to generate more intense turbulence.
These predictions are largely based on climate models, because it is difficult to collect the data needed to identify trends in air turbulence. These data largely come from reports by aircraft, the quality and extent of which are changing over time. These measurements are quite different from the long-term, methodically gathered data usually used to detect trends in the weather and climate.
How dangerous is air turbulence?
Around the globe, air turbulence causes hundreds of injuries each year among passengers and flight attendants on commercial aircraft. But, given the hundreds of millions of people who fly each year, those are pretty good odds.
Turbulence is usually short-lived. What’s more, modern aircraft are engineered to comfortably withstand all but the most extreme air turbulence.
And among people who are injured, the great majority are those who aren’t strapped in. So if you’re concerned, the easiest way to protect yourself is to wear your seat belt.
Todd Lane, Professor, School of Geography, Earth and Atmospheric Sciences, The University of Melbourne, The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Sunday, 5 May 2024
China Mobile’s three-pronged strategy to boost the 5G-A ecosystem
Viewpoint:
- Greater Speeds: 5G-A offers improved peak rates of 10 times more than that of 5G.
- Improved Services: With 5G-A, the end users will have access to tiered key service assurance that meets the communication service requirements of specific forms or customer groups.
- Innovative Products: 5G-A enables accelerated real-time 3D rendering, game loading and cloud collaboration, which is known to improve the performance of 5G New Calling, cloud phones and cloud computers.
- Massive Connections: Passive IoT technology enables a transformation from single-point communications to ultra-long-distance and ultra-large-scale passive connections of things, meeting customers’ requirements for efficient management of modern assets.
- Improved Control: 5G-A’s deterministic networks ensure highly reliable and low-latency transmission of key data, meeting customer needs for superior network performance that supports precision control and collaborative operations.
Friday, 3 May 2024
How cleaning product chemicals called ‘quats’ may affect the brain
Sunday, 24 March 2024
Can animals give birth to twins?

We are faculty members at Mississippi State University College of Veterinary Medicine. We’ve been present for the births of many puppies and kittens over the years – and the animal moms almost always deliver multiples.
But are all those animal siblings who share the same birthday twins?
Twins are two peas in a pod
Twins are defined as two offspring from the same pregnancy.
They can be identical, which means a single sperm fertilized a single egg that divided into two separate cells that went on to develop into two identical babies. They share the same DNA, and that’s why the two twins are essentially indistinguishable from each other.
Twins can also be fraternal. That’s the outcome when two separate eggs are fertilized individually at the same time. Each twin has its own set of genes from the mother and the father. One can be male and one can be female. Fraternal twins are basically as similar as any set of siblings.

Approximately 3% of human pregnancies in the United States produce twins. Most of those are fraternal – approximately one out of every three pairs of twins is identical.
Multiple babies from one animal mom
Each kind of animal has its own standard number of offspring per birth. People tend to know the most about domesticated species that are kept as pets or farm animals.
One study that surveyed the size of over 10,000 litters among purebred dogs found that the average number of puppies varied by the size of the dog breed. Miniature breed dogs – like chihuahuas and toy poodles, generally weighing less than 10 pounds (4.5 kilograms) – averaged 3.5 puppies per litter. Giant breed dogs – like mastiffs and Great Danes, typically over 100 pounds (45 kilograms) – averaged more than seven puppies per litter.
When a litter of dogs, for instance, consists of only two offspring, people tend to refer to the two puppies as twins. Twins are the most common pregnancy outcome in goats, though mom goats can give birth to a single-born kid or larger litters, too. Sheep frequently have twins, but single-born lambs are more common.
Horses, which are pregnant for 11 to 12 months, and cows, which are pregnant for nine to 10 months, tend to have just one foal or calf at a time – but twins may occur. Veterinarians and ranchers have long believed that it would be financially beneficial to encourage the conception of twins in dairy and beef cattle. Basically the farmer would get two calves for the price of one pregnancy.
But twins in cattle may result in birth complications for the cow and undersized calves with reduced survival rates. Similar risks come with twin pregnancies in horses, which tend to lead to both pregnancy complications that may harm the mare and the birth of weak foals.
DNA holds the answer to what kind of twins
So plenty of animals can give birth to twins. A more complicated question is whether two animal babies born together are identical or fraternal twins.
Biologists believe that identical twins in most animals are very rare. The tricky part is that lots of animal siblings look very, very similar and researchers need to do a DNA test to confirm whether two animals do in fact share all their genes. Only one documented report of identical twin dogs was confirmed by DNA testing. But no one knows for sure how frequently fertilized animal eggs split and grow into identical twin animal babies.
And reproduction is different in various animals. For instance, nine-banded armadillos normally give birth to identical quadruplets. After a mother armadillo releases an egg and it becomes fertilized, it splits into four separate identical cells that develop into identical pups. Its relative, the seven-banded armadillo, can give birth to anywhere from seven to nine identical pups at one time.
There’s still a lot that scientists aren’t sure about when it comes to twins in other species. Since DNA testing is not commonly performed in animals, no one really knows how often identical twins are born. It’s possible – maybe even likely – that identical twins may have been born in some species without anyone’s ever knowing.
Hello, curious kids! Do you have a question you’d like an expert to answer? Ask an adult to send your question to CuriousKidsUS@theconversation.com. Please tell us your name, age and the city where you live.
And since curiosity has no age limit – adults, let us know what you’re wondering, too. We won’t be able to answer every question, but we will do our best.
Michael Jaffe, Associate Professor of Small Animal Surgery, Mississippi State University and Tracy Jaffe, Assistant Clinical Professor of Veterinary Medicine, Mississippi State University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Wednesday, 7 February 2024
A novel look at how stories may change the brain

Monday, 9 October 2023
Women aren’t failing at science

Female research scientists are more productive than their male colleagues, though they are widely perceived as being less so. Women are also rewarded less for their scientific achievements.
That’s according to my team’s study for United Nations University - Merit on gender inequality in scientific research in Mexico, published as a working paper in December 2016.
The study, part of the project “Science, Technology and Innovation Gender Gaps and their Economic Costs in Latin America and the Caribbean”, was financed by the Gender and Diversity Fund of the Inter-American Development Bank (IDB).
The ‘productivity puzzle’
The study, which looked at women’s status in 42 public universities and 18 public research centres, some managed by Mexico’s National Council of Science and Technology (CONACYT), focused on a question that has been widely investigated: why are women in science less productive than men, in almost all academic disciplines and regardless of the productivity measure used?
The existence of this “productivity puzzle” is well documented, from South Africa to Italy, but few studies have sought to identify its possible causes.
Our findings demonstrate that, in Mexico at least, the premise of the productivity puzzle is false, when we control for factors such as promotion to senior academic ranks and selectivity.
Using an econometric modelling approach, including several macro simulations to understand the economic costs of gender gaps to the Mexican academic system, our study focused on researchers within Mexico’s National System of Researchers.

Additionally, despite the common belief that maternity leaves make women less productive in key periods of their careers, female researchers in fact have only between 5% to 6% more non-productive years than males. At senior levels, the difference drops to 1%.
Nonetheless, in the universities and research centres we studied, Mexican women face considerable barriers to success. At public research centres, women are 35% less likely to be promoted, and 89% of senior ranks were filled by men in 2013, though women comprised 24% of research staff and 33% at non-senior levels. Public universities do slightly better (but not well): female researchers there are 22% less likely to be promoted than men.
Overall, 89% of all female academics in our sample never reached senior levels in the period studied (2002 to 2013).
In some ways this data should not be surprising. Mexico ranks 66th out of 144 in the World Economic Forum’s 2016 Global Gender Gap Report and a 2015 report by the Organisation of Economic Co-operation and Development (OECD) showed that among OECD countries Mexico has the widest overall gender gap in labour participation rates.
Some efforts are being made to improve gender equality in research. In 2013 Mexico amended four articles of its Science and Technology Law to promote gender equality in those fields, adding provisions to promote gender-balanced participation in publicly funded higher education institutions and collect gender-specific data to measure the impact of gender on science and technology policies.
Several CONACYT research centres have launched initiatives to promote gender equality among staff, but many of these internal programmes are limited to anti-discrimination and sexual harassment training.
More aggressive programmes include: the Research Centre on Social Anthopology’s graduate scholarship programme, in collaboration with CONACYT and the National Commission for the Development of Indigenous Peoples, to promote higher education and training among indigenous women; and policies to increase women’s participation in higher academic ranks and management at the CIATEQ technological institute, which also gives childcare subsidies to female staff.
But such examples are rare. Overall, women hoping to succeed in Mexican academia must work harder and produce more than their male colleagues to be even considered for promotion to senior ranks.
This persistent inequality has implications not just for women but for the country’s scientific production: if Mexico were to eliminate gender inequality in promotions, the national academic system would see 17% to 20% more peer-reviewed articles published.
A global glass ceiling
Mexico is not alone. Our previous research in France and South Africa, using the same econometric model, found that gender inequalities there also prevent women scientists from being promoted to higher academic ranks.
Examining French physicists working in the Centre National de la Recherche Scientifique (CNRS) and in French public universities, we learned that female physicists in CNRS are as productive as their male colleagues or more so. Yet they are 6.3% less likely to be promoted within CNRS and 16.3% within universities. This is notable in a country that ranks 17th in the world in gender equality, according to the World Economic Forum.

In Uruguay the same IDB gender gaps project identified a glass ceiling as well. There women are underrepresented in the highest academic ranks and have a 7.1% less probability than men of being promoted to senior levels.
Moreover, from Mexico and Uruguay to France and South Africa, a vicious cycle between promotion and productivity is at play: difficulties in getting promoted reduce the prestige, influence and resources available to women. In turn, those factors can lead to lower productivity, which decreases their chances of promotion.
This two-way causality creates a source of endogeneity biases when including seniority as a variable to explain productivity in an econometric model. Only when we control for this, as well as for a selectivity bias (that is, publishing occurrence), do we find that female researchers are more productive than their male counterparts. Without these corrections, a gender productivity gap of 10% to 21% appears in favour of men.
The view that women are failing at science is commonly held, but evidence shows that, across the world, it’s science that’s failing women. Action must be taken to ensure that female researchers are treated fairly, recognised for their work, and promoted when they’ve earned it.
Lorena Rivera León, Economist and Research Fellow, United Nations University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Tuesday, 3 October 2023
What do people think about when they go to sleep?

You’re lying in bed, trying to fall asleep but the racing thoughts won’t stop. Instead, your brain is busy making detailed plans for the next day, replaying embarrassing moments (“why did I say that?”), or producing seemingly random thoughts (“where is my birth certificate?”).
Many social media users have shared videos on how to fall asleep faster by conjuring up “fake scenarios”, such as a romance storyline where you’re the main character.
But what does the research say? Does what we think about before bed influence how we sleep?
How you think in bed affects how you sleep
It turns out people who sleep well and those who sleep poorly have different kinds of thoughts before bed.
Good sleepers report experiencing mostly visual sensory images as they drift to sleep – seeing people and objects, and having dream-like experiences.
They may have less ordered thoughts and more hallucinatory experiences, such as imagining you’re participating in events in the real world.
For people with insomnia, pre-sleep thoughts tend to be less visual and more focused on planning and problem-solving. These thoughts are also generally more unpleasant and less random than those of good sleepers.
People with insomnia are also more likely to stress about sleep as they’re trying to sleep, leading to a vicious cycle; putting effort into sleep actually wakes you up more.
People with insomnia often report worrying, planning, or thinking about important things at bedtime, or focusing on problems or noises in the environment and having a general preoccupation with not sleeping.
Unfortunately, all this pre-sleep mental activity can prevent you drifting off.
One study found even people who are normally good sleepers can have sleep problems if they’re stressed about something at bedtime (such as the prospect of having to give a speech when they wake up). Even moderate levels of stress at bedtime could affect sleep that night.
Another study of 400 young adults looked at how binge viewing might affect sleep. The researchers found higher levels of binge viewing were associated with poorer sleep quality, more fatigue, and increased insomnia symptoms. “Cognitive arousal”, or mental activation, caused by an interesting narrative and identifying with characters, could play a role.
What is cognitive refocusing?
Cognitive refocusing, developed by US psychology researcher Les Gellis, involves distracting yourself with pleasant thoughts before bed. It’s like the “fake scenarios” social media users post about – but the trick is to think of a scenario that’s not too interesting.
Decide before you go to bed what you’ll focus on as you lie there waiting for sleep to come.
Pick an engaging cognitive task with enough scope and breadth to maintain your interest and attention – without causing emotional or physical arousal. So, nothing too scary, thrilling or stressful.
For example, if you like interior decorating, you might imagine redesigning a room in your house.
If you’re a football fan, you might mentally replay a passage of play or imagine a game plan.
A music fan might mentally recite lyrics from their favourite album. A knitter might imagine knitting a blanket.
Whatever you choose, make sure it’s suited to you and your interests. The task needs to feel pleasant, without being overstimulating.
Cognitive refocusing is not a silver bullet, but it can help.
One study of people with insomnia found those who tried cognitive refocusing had significant improvements in insomnia symptoms compared to a control group.
How ancient wisdom can help us sleep
Another age-old technique is mindfulness meditation.
Meditation practice can increase our self-awareness and make us more aware of our thoughts. This can be useful for helping with rumination; often when we try to block or stop thoughts, it can make matters worse.
Mindfulness training can help us recognise when we’re getting into a rumination spiral and allow us to sit back, almost like a passive observer.
Try just watching the thoughts, without judgement. You might even like to say “hello” to your thoughts and just let them come and go. Allow them to be there and see them for what they are: just thoughts, nothing more.
What can help ease your pre-sleep thoughts?
Good sleep starts the moment you wake up. To give yourself your best shot at a good night’s sleep, start by getting up at the same time each day and getting some morning light exposure (regardless of how much sleep you had the night before).
Have a consistent bedtime, reduce technology use in the evening, and do regular exercise during the day.
If your mind is busy at bedtime, try cognitive refocusing. Pick a “fake scenario” that will hold your attention but not be too scary or exciting. Rehearse this scenario in your mind at bedtime and enjoy the experience.
You might also like to try:
keeping a consistent bedtime routine, so your brain can wind down
writing down worries earlier in the day (so you don’t think about them at bedtime)
adopting a more self-compassionate mindset (don’t beat yourself up at bedtime over your imagined shortcomings!).
Melinda Jackson, Associate Professor at Turner Institute for Brain and Mental Health, School of Psychological Sciences, Monash University and Hailey Meaklim, Sleep Psychologist and Researcher, The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.