The study is based on an analysis of tax returns for nearly all children born in the United States from 1981 to 1984. It compared children from similar…
Now, CNIO researchers clear this dilemma up for bladder cancer, in which it exerts an anti-tumour effect. This result calls for caution when using therapeutic…
Squeezing light into tiny circuits and controlling its flow electrically is a holy grail that has become a realistic scenario thanks to the discovery of…
It holds the record among small molecules in terms of the charge-carrier mobility of electrons in air. It enables a new manufacturing technique thus opening up…
The customers want business jets to be nice inside; the aviation safety authorities want the furnishings to be fireproof. And the jet must never stand around…
A University of Delaware research team is considering the important question of what it will take to create an affordable emissions-free car.
A team of researchers has built an array of light detectors sensitive enough to register the arrival of individual light particles, or photons, and mounted…
The researchers, at the University of Adelaide in Australia and the Institute of Crop Sciences in the Chinese Academy of Agricultural Sciences in Beijing, have…
Scientists have long known that volcanoes cool the atmosphere because of the sulfur dioxide that is expelled during eruptions. Droplets of sulfuric acid that…
At a meeting of the American Astronomical Society in Seattle, Wash., today, Robert Nemiroff, a physics professor at Michigan Technological University, reported…
It sounds like a good idea, since even the timber from burned trees can be used for lumber. Economic benefit can come from otherwise devastated land. Even the…
“We have identified a new pathway in which well-studied signaling molecules string together to regulate cell proliferation,” said Sridhar Ramaswamy, MD, an…
2STEP-CP is a method of communication between two (mobile) signal sources and a relay station with two antennas. In a first time slot, the two signal sources send a first signal, respectively, in a second time slot a second signal. Based on the respective first and second signals the relay station generates a first and a second network-coded signal. In a third time slot, the first network-coded signal is sent via the first antenna and the second network-coded signal is sent via the second antenna. In a fourth time slot, the two network-encoded signals are sent via the respective other antenna. Based on the signal the signal sources have sent in the first two time slots, both signal sources are able to decode the network coded signals from the relay station. The process is also adaptable to a higher number of signal sources and antennas per relay station.
Common free space optical communication systems use intensity modulation, which has the drawback of a low spectral efficiency. However, OMIMO is an improved concept for free space optical (FSO) communication. To enhance efficiency a coherent transmission is used with incoherent light sources.
At the transmitter a baseband signal is phase-shifted for precoding, spatial multiplexing or beam forming. After upconversion of the baseband signal to a bandpass signal a DC-offset is added. This signal drives a light source, e. g. an LED or a laser diode by direct modulation. The receiver works with a reverse scheme. For transmitting and receiving a plurality of light source and photo detector can be used in parallel, respectively, to establish an optical MIMO concept.
The map, which can be viewed at http://is.gd/dibmap, was unveiled Jan. 8 at the 225th meeting of the American Astronomical Society in Seattle.
Optogenetics, which uses light to control cellular events, is poised to become an important technology in molecular biology and beyond. The Reich Group in UC…
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