It’s everyone’s worst nightmare: out of nowhere, a giant wave sweeps in from the sea, ending lives and destroying property with indiscriminate ferocity. While we can forecast bad weather, tsunamis triggered by giant submarine volcanic eruptions can devastate places and populations with very little warning. CUHK Professor Tan Yen Joe is trying to collect data that will allow scientists to better forecast the eruption of undersea volcanoes, potentially saving thousands of lives and sparing people untold misery.
With many places around the world opening up and dropping travel restrictions, plenty of sun worshippers and tan lovers will be seeking sun at the beach over the coming Christmas holidays. To protect your perfect tanned skin from sunburn, sunscreen is a must, but some use chemical ingredients which can irritate skin and are harmful to the environment. A CUHK scientist has developed a new ingredient for sunblock that is both effective and comfortable to wear, while avoiding potentially harmful chemicals.
A summer of heatwaves has wreaked havoc on human health, food security and natural ecosystems all over the world this year. With climate change on the march, Hong Kong, as a tiny dot on the map, can’t escape its effects. CUHK experts on climate change, earth and environmental sciences, and architecture discuss what the consequences could be, and what can we do to alleviate them.
After five years of effort, the first image of Sagittarius A*, 26,000 light-years away at the centre of the Milky Way, produced by the Event Horizon Telescope, has proved it to be a supermassive black hole. A CUHK scholar and a student from the Department of Physics are Hong Kong’s only participants in the team and have studied the simulation of gas movement and the mechanism of infalling gas around the black hole using supercomputers to help unravel the mystery of black holes.
The birth of the universe is always a mystery, as are its stars and galaxies. A CUHK professor has played key roles in an international astronomers’ 6-year project to produce maps of 10,000 galaxies using a new fibre-bundling technology while also collecting data on 24,000 stars in the Milky Way to help assess star populations in more distant galaxies light years away.
Over the past 40 years, there has been a marked increase in powerful super typhoons in the Pacific like Typhoon “In-fa” and “Cempaka”. From analysing recent typhoons and making projections based on a high-resolution climate model, a CUHK research team revealed that typhoons in Asia could be more intense at landfall, last longer and potentially double their punch by the end of this century, and they will travel further inland and do much more damage if global warming continues.
A material that can respond flexibly to external environment with freely adjustable properties of softness, hardness and size, shows promising potential for developing smart materials used in industrial or protective equipment. All this was once imaginary to many but it has been discovered by a CUHK physics team, using a unique network structure of packed particles to explore the topology of materials at the point of transition to elasticity.
Current technology like satellite remote sensing is sharper and faster than the human eye in studying earth terrain for climate change effects but limited in detecting changes to landscape from massive and vast permafrost thawing. A CUHK geophysicist has developed an AI tool “DeepThaw”, a unique algorithm fed by massive numbers of satellite images to detect destabilised slopes over a wide area automatically to address the risk our cryosphere is facing.
A dedicated young professor has developed algorithms which compute out a pure maths theory into the real world. Computational Quasi-conformal geometry (CQC), which maps out images of human organs like the brain, can be used to accurately detect abnormalities. Doctors used to analyse medical images with their eyes, but now maths gives them an accurate, efficient picture in 3D.
Research results show that physical distancing can only be relaxed in ratio to the rate of vaccination in the city’s population until herd immunity is achieved. A CUHK team developed a social contact index (SCI) which quantifies the effect of distancing and vaccination combined, to bridge gaps between intervention measures and disease transmission.
Advancing high-performance chips is the principal ambition of the semiconductor industry. Global demand for electronic products is buoyant. A recent study found that the average calligraphy ink is perhaps key to a low-cost, streamlined and environmentally friendly material deposition technology, helping to cope with the growing demand for chips with high applicability.
You fend off the heat on a scorching day but it's at night when you recover- or not, if that's hot too. Consecutive “hot nights” spell increased risk to health, even death, particularly in women and the elderly. Now Hong Kong researchers are telling metropolitan cities to be smart and improve urban greenery planning to combat “hot nights”.