Soft magnetic materials are key components of electrical power devices. Excess eddy current loss is the main energy loss that occurs in these materials at high frequencies. However, the mechanisms of these losses is not clearly understood due to limitations of existing measurement systems. In a new study, researchers developed a wide-band, high-sensitivity Magnetic Barkhausen noise measurement system that enabled them to clarify the origin of excess eddy current loss in metallic NANOMET® ribbons.

Singers appearing in opera singing competitions are typically ranked based on an overall score assigned by the judges. However, it has remained unclear exactly what elements in the singer’s voice contribute to these scores. In a new study, researchers analyzed opera singing recordings to identify the impact of various vocal characteristics and acoustic features on the scores assigned by the judges. Their findings could provide a scientific basis for future vocal training and education.

Researchers at Institute of Science Tokyo created a new material platform for non-volatile memories using covalent organic frameworks (COFs), which are crystalline solids with high thermal stability. The researchers successfully installed electric-field-responsive dipolar rotors into COFs. Owing to the unique structure of the COFs, the dipolar rotors can flip in response to an electric field without being hampered by a steric hindrance from the surroundings, and their orientation can be held at ambient temperature for a long time, which are necessary conditions for non-volatile memories.

Researchers Shinjiro Takano, Yuya Hamasaki, and Tatsuya Tsukuda of the University of Tokyo have successfully visualized the geometric structure of growing gold nanoclusters in their earliest stages. During this process, they also successfully “grew” a novel structure of elongated nanoclusters, which they named “gold quantum needles.” Thanks to their responsiveness to light in the near-infrared range, these “needles” could enable much higher-resolution biomedical imaging and more efficient light-energy conversion. The findings were published in the Journal of the American Chemical Society.

Designing high-performance electrocatalysts is one of the key challenges in the development of microbial electrochemical hydrogen production. Transition metal-based (TM-based) electrocatalysts are introduced as an astonishing alternative for future catalysts by addressing several disadvantages, like the high cost and low performance of noble metal and metal-free electrocatalysts, respectively. In this critical review, a comprehensive analysis of the major development of all families of TM-based catalysts from the beginning development of microbial electrolysis cells in the last 15 years is presented. Importantly, pivotal design parameters such as selecting efficient synthesis methods based on the type of material, main criteria during each synthesizing method, and the pros and cons of various procedures are highlighted and compared. Moreover, procedures for tuning and tailoring the structures, advanced strategies to promote active sites, and the potential for implementing novel unexplored TM-based hybrid structures suggested. Furthermore, consideration for large-scale application of TM-based catalysts for future mass production, including life cycle assessment, cost assessment, economic analysis, and recently pilot-scale studies were highlighted. Of great importance, the potential of utilizing artificial intelligence and advanced computational methods such as active learning, microkinetic modeling, and physics-informed machine learning in designing high-performance electrodes in successful practices was elucidated. Finally, a conceptual framework for future studies and remaining challenges on different aspects of TM-based electrocatalysts in microbial electrolysis cells is proposed.

Astronomers using ALMA have made the first spatially resolved detection of protostellar jets and outflows in the Milky Way’s outer region. Observations of Sh 2-283-1a SMM1 reveal episodic ejections every 900–4,000 years. The results show that while star formation follows universal physics, the region’s lower silicon-to-carbon ratio offers rare chemical insights into how stars formed under early cosmic conditions.

The study reported the development of a transparent mesoporous tungsten trioxide (WO₃) film that achieved efficient and durable solar-driven water splitting. A unique in situ template-carbonization strategy, the material maintains crystallinity, optical transparency, and stability under neutral conditions were optimized. This enhances photocurrent generation, oxygen evolution efficiency, and long-term performance, offering a scalable route for tandem photoelectrochemical devices and advancing the prospects of sustainable hydrogen production from sunlight.