科学 新闻

Clean-energy projects were the largest driver of China's economic growth in 2023, with Beijing investing nearly as much in decarbonization infrastructure as total global investment in fossil fuels, according to a report released Thursday.

With over 2,780 fishing ports and 993 commercial and industrial ports, Japan faces the challenge of safeguarding these important coastal assets from the destructive forces of tsunamis. A promising solution lies in the form of a movable barrier system, where gates rising from the seafloor act as barriers, protecting ports against tsunamis, storm surges and high waves. However, during natural disasters, power outages may disrupt the electricity needed to operate the gate.

When produced and used properly, hydrogen can potentially play many roles in the transition toward clean energy and industrial systems. Hydrogen can directly replace natural gas and coal in industrial and manufacturing processes where high temperatures are needed, replace natural gas and heating oil to keep buildings warm, and replace gasoline and diesel fuel to power cars and trucks.

In an ironic twist, a treasure trove of critical minerals is dumped out with water considered too polluted and expensive to clean.

Exploring the frontiers of textile design, Randall Kamien of the School of Arts & Sciences at the University of Pennsylvania and long-time collaborator Geneviève Dion, a professor of design at Drexel University, are investigating the mechanics of knitting, an area of research that represents a significant shift in understanding and using fabrics.

Following years of dedicated work with unmanned aerial vehicles (UAVs), NPS and Naval Research Laboratory (NRL) partners have successfully concluded the ultimate test of a nine-year continuum of research and development in one of the world's most challenging environments: the Arctic Circle.

Fracture propagation is ubiquitous across different temporal and spatial scales. Examples include the breaking of a vase, fatigue cracks in machine parts, and scars left by strong earthquakes. Understanding 3D fracture propagation is challenging due to its rapid occurrence and complex fracture shapes.

In a giant leap for future hypersonic flight, Chinese scientists have turned to multi-scale technology to develop a revolutionary new material that has achieved record high marks in tests for vital strength and thermal insulation properties.

Computer scientists have invented a highly effective—yet incredibly simple—algorithm to decide which items to toss from a web cache to make room for new ones. Known as SIEVE, the new open-source algorithm holds the potential to transform the management of web traffic on a large scale.

In a bid to meet growing food production and energy needs in low- and middle-income countries, solar-powered groundwater irrigation is rapidly gaining ground. More than 500,000 solar pumps have been installed in south Asia over the last few years and a major expansion is planned across sub-Saharan Africa.

Tin perovskites have gained tremendous attention in lead-free perovskite solar cells. However, Sn vacancies and undercoordinated Sn ions on the tin perovskite surfaces can create deep-level traps, leading to non-radiative recombination and absorption nucleophilic O2 molecules, impeding further device efficiency and stability.

Artificial intelligence (AI) has become an indispensable component in the analysis of microscopic data. However, while AI models are becoming better and more complex, the computing power and associated energy consumption are also increasing.

Paleontologists were able to determine that the teenagers' diet included deer, trout, hazelnuts, apple, duck and fox.

Self-healing electrical grids: It may sound like a concept from science fiction, with tiny robots or some sentient tech crawling around fixing power lines, but in a reality not far from fiction a team of researchers is bringing this idea to life.

Concrete is an essential material in the construction industry, where it is fundamental to the foundations and structures of dwellings and office buildings, as well as roads, dams and bridges, among many other infrastructure projects. However, the service life of concrete is limited, and it must be monitored in order to guarantee the safety of these structures.

More than 50 countries are set to hold national elections this year and analysts have long sounded the alarm on the threat of bad actors using artificial intelligence (AI) to disseminate and amplify disinformation during the election season across the globe.

Researchers have resolved the complex gas dynamics that occur upon opening a champagne bottle (or, more generally, a bottle containing a pressurized liquid and gas) and these dynamics' interaction with the bottle's cork stopper. The researchers' findings have been published in the journal Flow.

Using the bright X-rays of the Advanced Photon Source and a custom-built characterization platform, scientists have traced the ion movements inside perovskites, a potential material for new solar energy harvesting devices.

Aviation has grown considerably in recent decades and accounts for approximately 2% of global carbon dioxide emissions and some 4% of all climate change impacts annually. While aviation is an important contributor to climate change and other environmental problems, electrification is one option for reducing these environmental impacts.

The behavior of specific weather patterns and their impact on power faults could be used to develop a weather pattern-conditioned fault forecasting system for power system operators.