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MORE SCIENCE KNOWN in the last few years than in the history of mankind. The majority of scientists who shaped the world lived in the last 300 years. And the rate of change of knowledge approaches exponential growth. Remember the urban myth that the weight of science publications would soon exceed the weight of the earth? https://lnkd.in/eHareWj View in LinkedIn

FOOTNOTE. I am at a Synthetic Biology conference in London. All the talks are (matter-of-fact) about creating totally new life forms, totally new metabolic pathways totally new hybrid modular proteins by cut-and-paste, and making novel tissues and organs. We are now conducting directed evolution. Darwin would (possibly) be delighted. We live in exciting times. Very exciting times. View in LinkedIn

SPACE-TIME DUALITY. "Time cloaking is possible because of a kind of duality between space and time in electromagnetic theory. In particular, the diffraction of a beam of light in space is mathematically equivalent to the temporal propagation of light through a dispersive medium. In other words, diffraction and dispersion are symmetric in spacetime." https://lnkd.in/eVgKzAT View in LinkedIn

TWO TIME CLOAK METHODS. "The cloaks can either be constructed by synthesizing two linear time-invariant filters with different transfer functions to open and close a temporal gap orderly, so that any events occurring during the gap are not detectable outside, or be designed based upon temporal compensation to make event outside the cloaks not detectable." https://lnkd.in/eJ7ATea View in LinkedIn

FROM INVISIBILITY TO TIME CLOAKS. "Similar to distant spatial cloaks, which can cloak objects at a distance outside the cloaks and be regarded as a conjugated spatial filter, we can also construct a temporal cloak without time window to conceal events." https://lnkd.in/eJ7ATea View in LinkedIn

TRANSFORMATION OPTICS. "No matter whether the cloaks are for cloaking objects or for cloaking events, they are mainly designed based upon the popular transformation optics method." https://lnkd.in/eJ7ATea View in LinkedIn

TIME CLOAKING CLOAKS EVENTS. "Physicists have created a “hole in time” using the temporal equivalent of an invisibility cloak...Today, Moti Fridman and buddies, at Cornell University in Ithaca, go a step further. These guys have designed and built a cloak that hides events in time." https://lnkd.in/eVgKzAT View in LinkedIn

PROGRESS IN CLOAKING. "The first invisibility cloaks worked only at microwave frequencies but in only a few years, physicists have found ways to create cloaks that work for visible light, for sound and for ocean waves. They’ve even designed illusion cloaks that can make one object look like another." https://lnkd.in/eVgKzAT View in LinkedIn

DEFENSE AND METAMATERIALS. "In the last 5 years there has been great involvement of industry and particularly of the defence establishment in the USA who run several multi mullion dollar programs on metamaterials based at DARPA, WPAFB and Sandia." https://lnkd.in/eM8vuRF View in LinkedIn

EM DISTORTION, THE START. "Invisibility cloaks are the result of physicists’ newfound ability to distort electromagnetic fields in extreme ways. The idea is steer light around a volume of space so that anything inside this region is essentially invisible." https://lnkd.in/eVgKzAT View in LinkedIn