- Neuroinflammatory signals drive spinal curve formation in zebrafish models of idiopathic scoliosis
Zebrafish models implicate neuroinflammation as an underlying cause of, and druggable therapeutic target for, idiopathic scoliosis.
- New neurons use Slit-Robo signaling to migrate through the glial meshwork and approach a lesion for functional regeneration
Appropriate positioning of new neurons in the brain promotes post-stroke functional recovery.
- Structure and dynamical behavior of non-normal networks
We show that many real-world networks are non-normal, with important consequences for their stability and dynamical behavior.
- Sleepmore in Seattle: Later school start times are associated with more sleep and better performance in high school students
After a 55-min delay in high school start times, students increased their sleep significantly and improved attendance and grades.
- A nanocrystalline monoclinic CaCO3 precursor of metastable aragonite
Monoclinic aragonite (mAra) is a naturally occurring nanocrystalline precursor of metastable aragonite.
- Multicomponent new particle formation from sulfuric acid, ammonia, and biogenic vapors
Atmospheric aerosol formation from biogenic vapors is strongly affected by air pollutants, like NOx, SO2, and NH3.
- Urbanization affects peak timing, prevalence, and bimodality of influenza pandemics in Australia: Results of a census-calibrated model
Simulations associate urbanization with earlier peaks, higher peak prevalence, and shifting bimodality of pandemics in Australia.
- The mysterious long-range transport of giant mineral dust particles
Strong winds, turbulence, convective uplift, and electric charge may keep giant particles aloft.
- Glacial changes in tropical climate amplified by the Indian Ocean
Coupled ocean-atmosphere processes in the Indian Ocean amplify changes in Indo-Pacific climate under glacial conditions.
- Growing climatic sensitivity of U.S. agriculture linked to technological change and regional specialization
Core U.S. agricultural region has become more sensitive to climatic shocks due to changes in technology and specialization.
- Field responsive mechanical metamaterials
We present a new class of architected materials that exhibit rapid, reversible, and sizable changes in effective stiffness.
- New bounds on dark matter coupling from a global network of optical atomic clocks
The first Earth-scale quantum sensor network based on optical atomic clocks is looking for dark matter candidates.
- Engineering a light-responsive, quorum quenching biofilm to mitigate biofouling on water purification membranes
We engineered a light-responsive, quorum quenching biofilm and demonstrated its application in mitigating membrane biofouling.
- Current-driven magnetization switching in ferromagnetic bulk Rashba semiconductor (Ge,Mn)Te
Current-driven switching of ferromagnetism is observed in a bulk material with Rashba-type spin-polarized band.
About The Cover
COVER Cellular structures found in nature are often imitated in synthetic materials like polymeric and metallic foams. New technologies like four-dimensional printing are being used to create cellular structures with various characteristics that display unique mechanical, functional and thermal properties. These materials—known as metamaterials—generally do not respond to a changing environment because the material and architecture are fixed in time after their creation. Seeking a material that better adjusts to the stimuli in their environment, Jackson et al. incorporated magnetorheological (MR) fluid suspensions into three-dimensional-printed polymer tubes to create a new class of FRMMs. The MR fluids line up under a magnetic field, thus making them stiffer. The authors demonstrated their approach by printing cuboctahedron unit cells with controlled fluid delivery methods and testing them in a custom device in which the magnetic field strength could be specially regulated. They found that the average response time when hardening was less than a second and, when turned off to soften, was less than a quarter of a second. The researchers further developed a model to predict the responsiveness of their FRMMs in different conditions. [CREDIT: JULIE A. JACKSON]