IN A NUTSHELL 🌍 The Three Gorges Dam in China is the largest hydroelectric dam globally, symbolizing China’s engineering prowess. 🔍 NASA suggests that the dam’s massive water displacement might influence Earth’s rotation, affecting the planet’s natural balance. 💧 The dam’s reservoir, when full, could lengthen the day by 0.06 microseconds and alter Earth’s shape.
The quantum black hole with (almost) no equations by Professor Gerard ‘t Hooft.
How to reconcile Einstein’s theory of General Relativity with Quantum Mechanics is a notorious problem. Special relativity, on the other hand, was united completely with quantum mechanics when the Standard Model, including Higgs mechanism, was formulated as a relativistic quantum field theory.
Since Stephen Hawking shed new light on quantum mechanical effects in black holes, it was hoped that black holes may be used to obtain a more complete picture of Nature’s laws in that domain, but he arrived at claims that are difficult to use in this respect. Was he right? What happens with information sent into a black hole?
The discussion is not over; in this lecture it is shown that a mild conical singularity at the black hole horizon may be inevitable, while it doubles the temperature of quantum radiation emitted by a black hole, we illustrate the situation with only few equations.
About the Higgs Lecture.
The Faculty of Natural, Mathematical & Engineering Sciences is delighted to present the Annual Higgs Lecture. The inaugural Annual Higgs Lecture was delivered in December 2012 by its name bearer, Professor Peter Higgs, who returned to King’s after graduating in 1950 with a first-class honours degree in Physics, and who famously predicted the Higgs Boson particle.
A new “atlas” developed by researchers at Duke University School of Medicine, University of Tennessee Health Science Center, and the University of Pittsburgh will increase precision in measuring changes in brain structure and make it easier to share results for scientists working to understand neurological diseases such as Alzheimer’s disease.
The tool, the Duke Mouse Brain Atlas, combines microscopic resolution, three-dimensional images from three different techniques to create a detailed map of the entire mouse brain, from large structures down to individual cells and circuits.
“This is the first truly three-dimensional, stereotaxic atlas of the mouse brain,” said G. Allan Johnson, Ph.D., Charles E. Putman University Distinguished Professor of Radiology at Duke. He is also professor in the Department of Physics and the Department of Biomedical Engineering.
Posted in chemistry, energy, engineering, sustainability, transportation | Leave a Comment on A new shape for energy storage: Cone and disc carbon structures offer new pathways for sodium-ion batteries
As global demand for electric vehicles and renewable energy storage surges, so does the need for affordable and sustainable battery technologies. A new study has introduced an innovative solution that could impact electrochemical energy storage technologies.
The research is published in the journal Advanced Functional Materials. The work was led by researchers from the Department of Materials Science and NanoEngineering at Rice University, along with collaborators from Baylor University and the Indian Institute of Science Education and Research Thiruvananthapuram.
Using an oil and gas industry’s byproduct, the team worked with uniquely shaped carbon materials —tiny cones and discs—with a pure graphitic structure. These unusual forms produced via scalable pyrolysis of hydrocarbons could help address a long-standing challenge for anodes in battery research: how to store energy with elements like sodium and potassium, which are far cheaper and more widely available than lithium.
Lightweight lithium metal is a heavy-hitting critical mineral, serving as the key ingredient in the rechargeable batteries that power phones, laptops, electric vehicles and more. As ubiquitous as lithium is in modern technology, extracting the metal is complex and expensive. A new method, developed by researchers at Penn State and recently granted patent rights, enables high-efficiency lithium extraction—in minutes, not hours—using low temperatures and simple water-based leaching.
“Lithium powers the technologies that define our modern lives—from smartphones to electric vehicles—and has applications in grid energy storage, ceramics, glass, lubricants, and even medical and nuclear technologies,” said Mohammad Rezaee, the Centennial Career Development Professor in Mining Engineering at Penn State, who led the team that published their approach in Chemical Engineering Journal.
“But its extraction must also be environmentally responsible. Our research shows that we can extract lithium, and other critical minerals, more efficiently while drastically reducing energy use, greenhouse gas emissions and waste that’s difficult to manage or dispose of.”
Posted in chemistry, engineering, particle physics | Leave a Comment on Molecular engineering approach could boost hydrogen evolution reaction activity by up to 50 times in alkaline media
Electrolyzers are devices that can split water into hydrogen and oxygen using electricity and via a process known as electrolysis. In the future, these devices could help to produce hydrogen gas from water, which is valuable for a wide range of applications and could also be used to power fuel cells and decarbonize energy systems.
At the core of the water electrolysis process are electrochemical reactions known as hydrogen evolution reactions (HERs). In basic (i.e., alkaline) conditions, these reactions tend to be slow, which in turn hinders the performance of electrolyzers.
In recent years, energy researchers have been trying to design new electrode-aqueous interfaces or identify new catalysts that could speed up HERs and thus enhance the ability of electrolyzers to produce hydrogen. One of the HER catalysts most employed to date is platinum, yet its performance is limited by a process known as hydrogen binding. This process entails the strong adherence of hydrogen atoms to its surface, which can block reaction sites and slow down HERs.
Self-propulsion enzymatic nanomotors have shown tremendous potential in the field of diagnostics. In a study led by Wang and coworkers, nanoenzyme-driven cup-shaped nanomotors were designed for enhanced cell penetration and synergistic photodynamic/thermal treatments under single near-infrared laser irradiation. By combining the concepts of self-propulsion enzymatic nanomotors and synergistic dual-modal therapy, this work provides a new idea and tool for the application of nanomotors in the biomedical field.
As the world races to build the first commercial nuclear fusion plant, engineers from the University of Surrey have made a breakthrough in understanding how welded components behave inside the extreme conditions of a reactor—offering critical insights for designing safer and longer-lasting fusion energy systems.
Working in collaboration with the UK Atomic Energy Authority (UKAEA), the National Physical Laboratory, and global supplier of scientific instruments for nanoengineering TESCAN, researchers have developed and used an advanced microscopic method to map hidden weaknesses locked inside welded metals during manufacturing that can compromise reactor components and reduce their lifespan.
The research, published in the Journal of Materials Research and Technology, details how they examined P91 steel—a very strong and heat-resistant metal candidate for future fusion plants. Researchers applied an advanced imaging technique using a plasma-focused ion beam and digital image correlation (PFIB-DIC) to map residual stress in ultra-narrow weld zones that were previously too small to study with conventional methods.
For decades, researchers have been exploring ways to harness the power of the immune system to treat cancer. One breakthrough is cell therapy, often called ‘living drugs.’ This is a form of immunotherapy that uses immune cells from a patient or a healthy donor. With advanced engineering techniques, scientists enhance these cells to recognize better and attack cancer.
“During the late 1980s and 1990s, cancer researchers started exploring ways to advance immunotherapy by transferring immune cells into a patient to attack cancer cells,” says stem cell transplant and cellular therapy specialist Hind Rafei, M.D. “They recognized that immune cells found inside tumors could help destroy cancer cells, leading to the development of one of the earliest forms of cell therapy — tumor-infiltrating lymphocytes (TILs).”
Cell therapy is a form of immunotherapy that uses immune cells from a patient or a healthy donor to treat cancer. Learn about the types of cell therapy from stem cell transplant and cellular therapy specialist Hind Rafei, M.D.
Found in everything from kitchen appliances to sustainable energy infrastructure, stainless steels are used extensively due to their excellent corrosion (rusting) resistance. They’re an important material in many industries, including manufacturing, transportation, oil and gas, nuclear power and chemical processing.
However, stainless steels can undergo a process called sensitization when subjected to a certain range of high temperatures—like during welding—and this substantially deteriorates their corrosion resistance. Left unchecked, corrosion can lead to cracking and structural failure.
“This is a major problem for stainless steels,” says Kumar Sridharan, a professor of nuclear engineering and engineering physics and materials science and engineering at the University of Wisconsin–Madison. “When stainless steel gets corroded, components need to be replaced or remediated. This is an expensive process and causes extended downtime in industry.”
