Simple equation predicts force needed to push objects through sand

Simple equation predicts force needed to push objects through sand

For those of you who take sandcastle building very seriously, listen up: MIT engineers now say you can trust a very simple equation to calculate the force required to push a shovel -- and any other "intruder"-- through sand. The team also found that the same concept, known as the resistive force theory, can generate useful equations for cohesive materials like muds.

Electrons at the speed limit

Electrons at the speed limit

Speed may not be witchcraft, but it is the basis for technologies that often seem like magic. Modern computers, for instance, are as powerful as they are because tiny switches inside them steer electric currents in fractions of a billionth of a second. The incredible data flows of the internet, on the other hand, are only possible because extremely fast electro-optic modulators can send information through fibre-optic cables in the shape of very short light pulses.

3-D-printed structures 'remember' their shapes

3-D-printed structures 'remember' their shapes

Engineers from MIT and Singapore University of Technology and Design (SUTD) are using light to print three-dimensional structures that "remember" their original shapes. Even after being stretched, twisted, and bent at extreme angles, the structures -- from small coils and multimaterial flowers, to an inch-tall replica of the Eiffel tower -- sprang back to their original forms within seconds of being heated to a certain temperature "sweet spot."

Propagation protocols determined for 2 Nyssa species

AMES, IA - The genus Nyssa L. includes several woody species with traits valued by horticulturists, but only black gum (Nyssa sylvatica Marsh.) is prevalent in the nursery trade. Considered among the most beautiful trees native to North America, cultivars of black gum provide outstanding foliage color in autumn.

Solar cell is more efficient, costs less than its counterparts

CAMBRIDGE, MA -- The cost of solar power is beginning to reach price parity with cheaper fossil fuel-based electricity in many parts of the world, yet the clean energy source still accounts for just slightly more than 1 percent of the world's electricity mix.

One in two users click on links from unknown senders

Most people know that e-mails and facebook messages from unknown senders can contain dangerous links. However, many users still click on them - and Dr. Zinaida Benenson from the Chair of Computer Science 1 at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) has investigated why. The results of the experiment were clear: up to 56 percent of e-mail recipients and around 40 percent of facebook users clicked on a link from an unknown sender although they knew of the risks of their computer becoming infected with a virus. And the main reason? Curiosity.

Continuous roll-process technology for transferring and packaging flexible LSI

Daejeon, Republic of Korea, August 29, 2016--A research team led by Professor Keon Jae Lee from the Korea Advanced Institute of Science and Technology (KAIST) and by Dr. Jae-Hyun Kim from the Korea Institute of Machinery and Materials (KIMM) has jointly developed a continuous roll-processing technology that transfers and packages flexible large-scale integrated circuits (LSI), the key element in constructing the computer's brain such as CPU, on plastics to realize flexible electronics.

New research sheds light on how aged wine gets its aroma

Researchers have discovered an enzyme that plays a leading role in the formation of compounds that give aged wines their sought-after aroma.

Traffic accidents increased by 50 percent in patients with implantable cardioverter defibrillator

Rome, Italy - 28 Aug 2016: The risk of traffic accidents is increased by 50% in patients with an implantable cardioverter defibrillator (ICD) compared to age and gender matched controls, according to a Danish nationwide registry study presented at ESC Congress 2016 today.1

Scientists experimentally realize optomechanically induced non-reciprocity

Light has reciprocity with bidirectional transmission in ordinary media. Circulators and isolators are indispensable components in classical and quantum information processing in an integrated photonic circuit. Therefore, all-optical controllable non-reciprocal devices are always a hot topic in the research of photonic chips. Normal non-reciprocal devices are based on magnetic-optical material. However, incorporating low optical-loss magnetic materials into a photonic chip is technically challenging.