Scientists at Osaka University develop a liquid-phase method for 3D-printing nanocellulose fibers aligned in multiple directions. This work may help with the development of new smartphone screens or electronics printed on paper.
Airborne transmission of viruses, like the virus causing COVID-19, is not well understood, but a good baseline for study is a deeper understanding of how particles travel through the air when people cough. In Physics of Fluids, researchers discuss a simulation they created that examines saliva droplets moving through the air in front of a coughing person. The work shows that with a slight breeze of 4 kph, saliva travels 18 feet in 5 seconds.
Many patients with heart disease face limited treatment options. Fortunately, stem cell biology has enabled researchers to produce large numbers of cardiomyocytes, which may be used in drug screens and cell-based therapies. However, current image analysis techniques don't allow researchers to analyze heterogeneous, multidirectional, striated myofibrils typical of immature cells. In the Journal of Applied Physics, researchers showcase an algorithm that combines gradient methods with fast Fourier transforms to quantify myofibril structures in heart cells.
Gesturing with the hands while speaking is a common human behavior, but no one knows why we do it. Now, a group of UConn researchers reports in the May 11 issue of PNAS that gesturing adds emphasis to speech--but not in the way researchers had thought.
A study of marine Halobates species highlights how their waterproofing techniques, size and acceleration capability helped them colonize the ocean.
Robots can be made from soft materials, but the flexibility of such robots is limited by the inclusion of rigid sensors necessary for their control. Researchers created embedded sensors, to replace rigid sensors, that offer the same functionality but afford the robot greater flexibility. Soft robots can be more adaptable and resilient than more traditional rigid designs. The team used cutting-edge machine learning techniques to create their design.
For something that has evolved with us over millions of years, and remains part of our physiology over our entire lives, our gut microbiome, oddly, remains somewhat of a mystery. Comprised of trillions of microbes of at least a thousand different species, this community of bacteria, viruses, protozoa and fungi in our gastrointestinal tracts is unique to each individual and has been found to be intimately connected to various fundamental aspects of our fitness, from our immunity to our metabolism and mental health.
Biomedical engineers are developing a massive fluid dynamics simulator that can model blood flow through the full human arterial system at subcellular resolution. One of the goals of the effort is to provide doctors with a virtual reality system that can guide their treatment plans by allowing them to simulate a patient's specific vasculature and accurately predict how decisions such as stent placement, conduit insertions and other geometric alterations will affect surgical outcomes.
TU Graz researcher Francesco Greco has developed ultra-light tattoo electrodes that are hardly noticeable on the skin and make long-term measurements of brain activity cheaper and easier.
POSTECH Professor Won Jong Kim's team uses immunological synapse formation of natural killer cells to treat cancer.