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Category: engineering

‘More than just an image’: New algorithm can extract hyperspectral info from conventional photos

Professionals in agriculture, defense and security, environmental monitoring, food quality analysis, industrial quality control, and medical diagnostics could benefit from a patent-pending innovation that opens new possibilities of conventional photography for optical spectroscopy and hyperspectral imaging.

Young Kim, Purdue University professor, University Faculty Scholar and Showalter Faculty Scholar, and postdoctoral research associate Semin Kwon of the Weldon School of Biomedical Engineering created an algorithm that recovers detailed spectral information from photographs taken by conventional cameras. The research combines computer vision, color science and optical spectroscopy.

“A photograph is more than just an image; it contains abundant hyperspectral information,” Kim said. “We are one of the pioneering research groups to integrate computational spectrometry and spectroscopic analyses for biomedical and other applications.”

Alleviating head-mounted weight burden for neural imaging in freely-behaving rodents

Liu et al. present a remarkably simple yet clever method of mitigating the effects of head-mounted microscopes on mouse behavior: they tethered a helium balloon to the microscope device to counter its weight! A fun and useful engineering solution!

Link to article.

Scientific Reports — Alleviating head-mounted weight burden for neural imaging in freely-behaving rodents. Sci Rep 15, 19175 (2025). https://doi.org/10.1038/s41598-025-04300-0

Quantum dot and polymer cross-linking enables 50% stretch capability for micro-LED displays

A research team has developed a next-generation display core material with excellent stretchability and superior color reproduction. The team developed a high-performance color-conversion layer that is more flexible and vivid than conventional ones. This layer was successfully applied to the development of a stretchable micro-LED display, drawing significant attention.

The paper is published in the journal Advanced Materials. The team was led by Professor Jiwoong Yang in the Department of Energy Science and Engineering at DGIST and included Professor Moonkee Choi and Professor Jongnam Park of UNIST and Professor Daehyeong Kim of Seoul National University.

Professor Yang’s team has recently developed, for the first time in the world, a new technology that enables the direct linkage of quantum dots, which are emerging as next-generation materials, with stretchable polymers that can stretch like rubber.

Floquet effects unlock graphene’s potential for future electronics

Graphene is an extraordinary material—a sheet of interlocking carbon atoms just one atom thick that is stable and extremely conductive. This makes it useful in a range of areas, such as flexible electronic displays, highly precise sensors, powerful batteries, and efficient solar cells.

A new study—led by researchers from the University of Göttingen, working together with colleagues from Braunschweig and Bremen in Germany, and Fribourg in Switzerland—now takes graphene’s potential to a whole new level. The team has directly observed “Floquet effects” in graphene for the first time.

This resolves a long-standing debate: Floquet engineering—a method in which the properties of a material are very precisely altered using pulses of light—also works in metallic and semi-metallic quantum materials such as graphene. The study is published in Nature Physics.

Students develop novel multi-metal 3D printing process

Students at ETH Zurich have developed a laser powder bed fusion machine that follows a circular tool path to print round components, which allows the processing of multiple metals at once. The system significantly reduces manufacturing time and opens up new possibilities for aerospace and industry. ETH has filed a patent application for the machine, and the results are published in the CIRP Annals.

Today, virtually all modern rocket engines rely on 3D printing to maximize their performance with tight coupling between structure and function. Students at ETH Zurich have now built a high-speed multi-material metal printer: a laser powder bed fusion machine that rotates the powder deposition and gas flow nozzles while it prints, which means it can process several metals simultaneously and without process dead time. The machine could fundamentally change the 3D printing of metal parts, resulting in significant reductions in production time and cost.

The team of six Bachelor’s students in their fifth and sixth semesters developed the new machine in the Advanced Manufacturing Lab under the guidance of ETH Professor Markus Bambach and Senior Scientist Michael Tucker as part of the Focus Project RAPTURE. In a mere nine months, the students realized, built and tested their idea. The machine is particularly aimed at applications in aerospace featuring approximately cylindrical geometries, such as rocket nozzles and turbomachinery, but is also of broad interest for mechanical engineering.

Advanced model unlocks granular hydrogel mechanics for biomedical applications

Researchers at the University of Illinois Urbana-Champaign have developed a novel framework for understanding and controlling the flow behavior of granular hydrogels—a class of material made up of densely packed, microscopic gel particles with promising applications in medicine, 3D bioprinting, and tissue repair.

The new study, published in Advanced Materials, was led by chemical and biomolecular engineering professors Brendan A. Harley and Simon A. Rogers, whose research groups specialize in biomaterials engineering and rheology, respectively.

Granular hydrogels have a unique ability to mimic the of living tissue, which makes them ideal candidates for encapsulating and delivering cells directly into the body. By integrating material synthesis and characterization with rheological modeling, the researchers created a that captures the essential physics of how granular hydrogels deform—reducing a complex problem to a few controllable parameters.

Snap-through effect helps engineers solve soft material motion trade-off

Everyday occurrences like snapping hair clips or clicking retractable pens feature a mechanical phenomenon known as “snap-through.” Small insects and plants like the Venus flytrap cleverly use this snap-through effect to amplify their limited physical force, rapidly releasing stored elastic energy for swift, powerful movements.

Inspired by this , researchers from Hanyang University have developed a polymer-based jumper capable of both vertical and directional leaps, triggered simply by uniform ultraviolet (UV) light irradiation.

Published in Science Advances, this study tackles a classic engineering dilemma: how to make produce strong, rapid motions.

Styrofoam-based hydrogen storage: New process offers safe, reusable solution

A research team affiliated with UNIST has unveiled a novel technology that enables hydrogen to be stored within polystyrene-derived materials, particularly those originating from Styrofoam. The research is published in the journal ACS Catalysis.

This advancement not only offers a solution to the low recycling rate of —less than 1%—but also makes hydrogen storage and transportation more practical and accessible, addressing the challenges associated with handling gaseous hydrogen.

Led by Professor Kwangjin An from the School of Energy and Chemical Engineering at UNIST, in collaboration with Dr. Hyuntae Sohn from KIST and Professor Jeehoon Han from POSTECH, the team successfully designed a comprehensive, closed-loop system to convert waste polystyrene into a liquid organic hydrogen carrier (LOHC). This innovative process enables efficient hydrogen storage, retrieval, and reuse.

Diagnosing diabetes may soon be as easy as breathing into a bag

In the U.S., one in five of the 37 million adults who has diabetes doesn’t know it. Current methods of diagnosing diabetes and prediabetes usually require a visit to a doctor’s office or lab work, both of which can be expensive and time-consuming. Now, diagnosing diabetes and prediabetes may be as simple as breathing.

A research team led by Huanyu “Larry” Cheng, James L. Henderson, Jr. Memorial Associate Professor of Engineering Science and Mechanics at Penn State, has developed a sensor that can help diagnose diabetes and prediabetes on-site in a few minutes using just a breath sample. Their results are published in the Chemical Engineering Journal.

Previous diagnostic methods often used glucose found in blood or sweat, but this sensor detects acetone levels in the breath. While everyone’s breath contains acetone as a byproduct of burning fat, acetone levels above a threshold of about 1.8 parts per million indicate diabetes.

Tiny defects deliver big gains: Controlling oxygen vacancies boosts thermoelectric efficiency by 91%

A research team has dramatically enhanced the efficiency of converting heat into electricity. The key lies in controlling tiny defects known as oxygen vacancies.

Their findings were published as a front cover article in the journal Advanced Science. The team was led by Professor Hyungyu Jin and Dr. Min Young Kim from the Department of Mechanical Engineering at POSTECH, in collaboration with Professors Donghwa Lee and Si-Young Choi from the Department of Materials Science and Engineering, and Professor Joseph P. Heremans from the Ohio State University.

Each day, enormous amounts of heat are lost around us: hot steam from factory chimneys, heat from car engines, and even the warmth generated by smartphones and computers. This is typically left unused, but if it could be converted back into electricity, it would offer a powerful solution to both energy inefficiency and environmental challenges.

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