As people age, joints become less flexible, causing balance problems that lower quality of life. Dr. Kosuke Hirata, Mr. Ryosuke Yamadera, and Prof. Ryota Akagi from the Shibaura Institute of Technology revealed that among younger adults, muscle but not nerve stiffness is associated with the ankle's range of motion (ROM), whereas only nerve stiffness is linked to ankle ROM among older adults. In other words, non-muscle tissue becomes more important for joint flexibility with age.
Couinter-intuitively, small marine animals don't use their limbs or propulsors to push themselves through the water while swimming. Instead, their appendages create negative pressure behind them that pulls the animal through the water, scientists from the Marine Biological Laboratory report.
Scientists have developed a lung-on-chip model to study how the body responds to early tuberculosis (TB) infection, according to findings published today in eLife.
POSTECH-Stanford joint research team develops multimodal ion-electronic skin that distinguishes temperature from mechanical stimuli. This skin can detect various movements and is applicable in fields including humanoid skin and temperature sensors.
Plasma medicine is an emerging field, as plasmas show promise for use in a wide range of therapies from wound healing to cancer treatment, and plasma jets are the main plasma sources typically used in plasma-surface applications. To better understand how plasma jets modify the surfaces of biological tissue, researchers conducted computer simulations of the interaction between an atmospheric pressure plasma jet with a surface that has properties similar to blood serum.
Using face masks to help slow the spread of COVID-19 has been widely recommended by health professionals. This has triggered studies of the materials, design, and other issues affecting the way face masks work. In Physics of Fluids, investigators looked at research on face masks and their use and summarized what we know about the way they filter or block the virus. They also summarize design issues that still need to be addressed.
To find out how the COVID-19 virus survives on surfaces, researchers are exploring the drying times of thin liquid films that persist after most respiratory droplets evaporate. While the drying time of typical respiratory droplets is on the order of seconds, the survival time of the COVID-19 virus was on the order of hours. In Physics of Fluids, the researchers describe how a nanometers-thick liquid film clings to the surface, allowing the virus to survive.
New fluid dynamics research reveals why social distancing alone doesn't necessarily prevent infection indoors and how to detect COVID-19 super-spreaders.
Understanding how the clear, watery substance flows through the brain could yield new insights into health and disease.
Fluids researchers pivot to create more effective face coverings.