Scientists have observed the crystallization of nickel's two structural forms, cubic and hexagonal, in a liquid solution using liquid-phase electron microscopy. This breakthrough has significant implications for understanding nickel-based catalysts and their applications.
A new self-powered fabric, developed using triboelectric nanogenerators, can monitor and correct poor posture in real-time. The technology uses machine learning algorithms to provide immediate feedback and has been shown to accurately recognize the wearer's posture 96.6% of the time.
Researchers develop a new optimization model integrating electricity and hydrogen systems to evaluate the potential value of long-duration energy storage (LDES) in a net-zero grid. The integration of LDES technologies reduces overall annual cost of the electricity grid by tens or hundreds of millions of pounds.
Engineers at China University of Hong Kong propose optimal design elements for aqueous electrolytes in low temperature aqueous batteries. They found that ideal antifreezing electrolytes should exhibit low freezing temperatures and strong supercooling abilities, enabling ion transport at ultra-low temperatures.
Researchers are exploring bio-inspired smart insulation materials that can adapt, heal, and report their own failure to inspectors, enabling more efficient and reliable power grids. These materials have the potential to extend service life and prevent costly interruptions.
The article discusses the advantages of using SiC MOSFETs in power converters, including high efficiency, power density, and fast switching speeds. Researchers have developed novel control technologies, such as SCC and ICBT methodologies, to improve the performance of SiC MOSFETs in medium-voltage applications, enabling their adoption ...
The new journal iEnergy aims to unite experts in various energy-related disciplines to accelerate the transformation of the energy structure and achieve carbon neutrality. Original research articles focus on technologies and solutions for power and energy challenges, with a special connection to electrical energy.
Researchers provide a comprehensive survey on emerging RIS technology, discussing its promise and challenges in wireless communication systems. The technology offers unique features such as passive transmission and improved signal quality, but open problems remain to be solved.
Researchers at Tsinghua University Press examined the combination of dirty paper coding and reconfigurable intelligent surfaces to achieve highly efficient data transmission. Numerical simulation results demonstrated that this technique can effectively improve the sum rate capacity compared to benchmark schemes.
Researchers from China and the UK propose an IRS-aided two-phase secrecy communication scheme to enhance physical layer security in scenarios involving both active attacks and passive eavesdropping. The technique achieves more secure communication using energy harvesting technology and beamforming design.
A new collection of peer-reviewed research papers highlights the role of RISs in advancing wireless communications. The special issue, published on April 29, investigates performance analysis and optimization, strength and security of channels, integration into current wireless systems, and an overview of RIS hardware.
Researchers found that RISs can reduce channel aging's adverse impact on system performance and improve overall performance. The study models a system where a base station sends signals to an RIS and users, which reflects the signal back to users, strengthening it.
A team of scientists in China and the UK developed an aerial intelligent reflecting surface (AIRS) to enhance communication security. The AIRS can be easily mounted on a drone to form a flexible network, reducing the risk of eavesdropping.
Reconfigurable intelligent surfaces (RIS) are a promising technology for next-generation wireless networks, offering improved flexibility and energy efficiency. Researchers explored RISs as a potential solution for 6G, which is expected to require more radical communication paradigms.
Scientists propose reconfigurable intelligent surface technology for grant-free massive access, improving access reliability and efficiency in low-latency applications. The study demonstrates the effectiveness of RIS in enhancing access channel conditions and quality in smart factory scenarios.
A team of Chinese and UK researchers propose a reconfigurable intelligent surface technique to address the high energy consumption issue in THz communication for future 6G technology development. The study reveals that this approach achieves more energy-efficient beamforming than traditional phased array techniques.
A simulator is built to test eight widely used matching functions under various market scenarios, with the best-fit models summarized. The study aims to address the applicability and performance of these functions in different ride-sourcing markets.
Researchers from Tsinghua University Press have developed a potassium ion battery using MXene compounds, demonstrating outstanding performance and high power density. The battery outperforms traditional lithium-ion batteries, maintaining nearly full capacity after 30,000 cycles.
Researchers developed an alloyed Ir- and Ru-based oxide with enhanced atomic steps, improving its electrocatalytic performance. The novel nanomaterial outperformed commercially available iridium dioxide in hydrogen production, offering a cleaner and more affordable alternative.
An interdisciplinary team studied lithium-CO2 batteries to overcome critical problems for their potential as new energy storage devices. The team identified the electrochemical mechanism's lack of understanding and efficient electrocatalysts as significant hurdles.
A new study by researchers from Tsinghua University redefines the interface between liquids and solid surfaces based on intermolecular forces. The findings reveal intrinsic wetting thresholds that deviate from Young's equation, providing a new perspective on wettability and its relationship with molecular interactions.
A novel approach to enhancing lithium-ion storage performance is presented using iron-laced carbon nanofibers. The material exhibited improved electron and ion transfer, resulting in sustained electric power through 5000 cycles of high current density.
Researchers developed a novel cathode composition that overcomes challenges in manufacturing, offering high area capacity and promising performance. The resulting composite cathode delivers an area capacity above 8 mAh/cm2 within a wide range of voltages.
Researchers have developed a novel platform that uses sunlight to purify oil-contaminated seawater with high energy efficiency. The approach avoids common pitfalls and can produce up to 2.4 kilograms of purified water per square meter per hour, making it a promising solution for alleviating global water scarcity.
Scientists at Tsinghua University Press have created a novel synergistic single-atom catalyst approach that enhances the efficiency of hydrogenation reactions. The new catalyst combines iridium nanoparticles and single atoms, overcoming the limitations of previous single-atom catalysts.
A new study uses a vast dataset to test the idea that hierarchical structures in human societies arose from cognitive limits on information processing. The research found that for small-scale societies, population size and governing system development influence hierarchy emergence, while medium- and large-scale societies are shaped by ...
A new recycling method using a low-cost, dip-coating process converts common plastic waste into highly functional materials. These materials can selectively separate oil/water mixtures and exhibit self-cleaning properties.
Hunter-gatherer groups have a greater capacity for collective computation due to their small sizes and large brain-to-body mass ratio. Small-world network structures enable efficient information sharing and cost-effective policing of free riders, allowing for superior fitness and understanding of the world.
Researchers developed a nano-scale copper-silver-gold structure that enhances electrochemical CO2 reduction reaction selectivity. The trimetallic design allows for precise tuning of product outcomes, optimizing the production of ethanol and other desired compounds.
Communications in Transportation Research enforces Data and Code Disclosure and Sharing Policy to ensure replicability and research resource sharing. Authors must provide necessary materials for reproducing published works, contributing to the community's rigor and transparency.
Ferroelectric random access memory (FeRAM) faces reliability challenges due to 'imprint' and 'fatigue'. A novel hafnium-based material has addressed these issues by reducing the impact of charge injection, leading to a 90% improvement in performance. High-temperature baking of capacitors also enhances performance.
A paper by University of California, Berkeley's Joanne Cheung argues that social media platforms should be governed like urban planning spaces to prioritize public interests. She notes parallels with commercial real estate development and suggests establishing a professional role with ethical principles to serve the public interest.
This article reviews bi-level optimization models applied to ship air emission management, highlighting the challenges of implementing regulations and policies. The study finds that the maritime industry's reaction to policies can have negative effects on emission reduction.
A non-profit founder argues that technology companies have a role as 'spiritual caretakers' and must prioritize individual and collective well-being. The author suggests broadening the frame of innovation to incorporate spirituality and caretaking traditions, which can help mitigate harms and create more tech that benefits humanity.
Researchers found that shared e-scooters waste significant energy in idle status, with up to 41.9% of energy loss on weekends. The study suggests e-scooters could be a competitive transport mode against walking and cycling in urban systems, but highlights the need for better operations and regulation.
A new strategy using selective hydrogenation improves interface properties between 2D semiconductors and high-k dielectrics. Hydrogenation passivates dangling molecular bonds on high-k dielectrics without damaging 2D semiconductors.
A technology ethicist argues that the field has become too vague and toothless, failing to address broader socio-economic systems that govern tech development. He advocates for a sociotechnical lens, focusing on technology's social impacts and context.
Researchers developed a novel ultrafast crystal growth process using liquid metal and atmospheric pressure chemical vapor deposition to produce high-quality gallium selenide crystals. The new method enables the production of large-sized crystals in just five minutes, overcoming the traditional time delay in semi-conductor applications.
The Inka empire's khipu system, a tactile fiber medium, recorded quantitative and qualitative data through encoding systems that still need to be fully grasped. This technology allowed for the expansion of the empire and implies a broad understanding of the language of khipus.
Researchers at Tsinghua University Press developed a nanoplatform that non-invasively eliminates solid liver cancer tumors in mice within a single five-minute dose. The treatment, which combines three mechanisms, achieves tumor eradication without perceivable side effects.
Researchers used an optical microscope to study the self-attraction of nanowires, revealing that electrostatic force is the primary driver. The study's findings have significant implications for fabricating high-quality nanowires and developing high-performance devices.
Researchers have developed a new method for producing hydrogen peroxide using copper-doped titanium dioxide as a catalyst. The process exhibits high selectivity and yield, making it a safe and sustainable alternative to traditional methods.
A new study suggests that writing systems are a crucial bottleneck preventing social groups from solving problems efficiently. The Seshat dataset reveals a 'scale threshold' where societies must reach a certain size before developing writing systems, which enables almost unlimited growth.
Researchers found that governance, rather than society size, plays a key role in determining the complexity of computational communications in prehispanic Mesoamerica. Computational communications were highly elaborate in areas ruled by autocratic rulers but less complex in areas with more collective power arrangements.
A research team found that combining human and AI predictions yields more accurate results, especially in atypical cases with unknown factors. Human analysis can fill gaps in big data, leading to better collective predictions.
Researchers have overcome significant barriers to developing safe and long-life lithium metal batteries by creating a new structure in the negative electrode that can regulate lithium ion flux. The results show high capacity retention of over 80% after more than 200 cycles of recharging.
Scientists have found that adding a single atom to rutile titanium dioxide can create oxygen vacancies, leading to more stable local structures and controlling reaction stability. This discovery could lead to new ways of understanding the relationship between material structure and function.