Lifeboat Foundation

Recently, surprising physical effects were observed using special microscopic waveguides for light. Such “photonic structures” currently are revolutionizing the fields of optics and photonics, and have opened up the new research area of “Chiral Quantum Optics”. Physicists from Copenhagen, Innsbruck, and Vienna, who are leading figures in this field, have now written an overview on the topic which just appeared in the scientific journal “Nature”.

What one learns at school is that light oscillates under a right angle (transversal) with respect to its direction of propagation. Among experts, however, it was already known that light behaves differently when it is confined strongly in the transversal plane using so-called “photonic structures”. In particular, this is the case for special ultra-thin glass fibers which have a diameter of only a few hundred nanometers (one nanometer is a millionth part of a millimeter) and which are thereby smaller than the wavelength of light. Also waveguides based on so-called “photonic crystals” (two-dimensional structures with periodically arranged holes) can confine light in this way.

In this situation, the light also oscillates along its propagation direction (longitudinal). The combination of transversal and longitudinal oscillation leads to a rotating electric field which physicist call circular polarization. Without the spatial confinement, the electric field associated with circularly polarized light behaves like the propeller of an aircraft whose axis is parallel to the direction of propagation. “However, in narrow photonic waveguides, the electric field of the light resembles the rotor of a helicopter,” explains Arno Rauschenbeutel from the Vienna Center for Quantum Science and Technology at the Institute of Atomic and Subatomic Physics of TU Wien, Austria. Here, the spin of the light points along the axis of the rotor and is therefore oriented perpendicular to the propagation direction of the light.

Continue reading “Chiral Quantum Optics: A New Research Field with Bright Perspectives” »

Bummed that I missed 3D Print Fashion Week.

To capture the most memorable moments, CNN Style commissioned fashion illustrator Velwyn Yossy to illustrate the highlights in her distinctive water colors.

A Salmonella pathogen manages a trade-off between virulence and transmission by manipulating the gut–brain axis and blocking appetite loss.

Could we eventually see a day where we have cell circuitry nanobot pill that eliminates hunger and obesity as replacement to gastric bypasses? Maybe.

The human body responds to starving conditions, such as famine, to promote the chance of survival. It reduces energy expenditure by stopping heat production and promotes feeding behavior. These “hunger responses” are activated by the feeling of hunger in the stomach and are controlled by neuropeptide Y (NPY) signals released by neurons in the hypothalamus. However, how NPY signaling in the hypothalamus elicits the hunger responses has remained unknown.

Sympathetic motor neurons in the medulla oblongata are responsible for heat production by brown adipose tissue (BAT). Researchers centered at Nagoya University have now tested whether the heat-producing neurons respond to the same hypothalamic NPY signals that control hunger responses. They injected NPY into the hypothalamus of rats and tested the effect on heat production. Under normal conditions, blocking inhibitory GABAergic receptors or stimulating excitatory glutamatergic receptors in the sympathetic motor neurons induced heat production in BAT. After NPY injection, stimulating glutamatergic receptors did not produce heat, but inhibiting GABAergic receptors did. The study was recently reported in Cell Metabolism.

Continue reading “Researchers uncover how brain circuit elicits hunger responses during starvation” »

On Wed we saw Tata’s new hydrogen bus; and now this.

DETROIT (Reuters) — General Motors Co and Honda Motor Co are expected on Monday to announce an expansion of their collaboration on fuel cell technology development, people familiar with the plans said following a notice of a press conference.

GM and Honda on Friday said two senior executives would hold a news conference in Detroit with Michigan’s Lieutenant Governor, Brian Calley.

Continue reading “GM, Honda to announce fuel cell technology advance: sources” »

https://youtube.com/watch?v=6A1knkZiysQ

Clearing out senescent cells could lead to better fitness and health as we age.

From around age forty we start to lose muscle mass due to various aging processes, one of these processes is the accumulation of senescent cells. Senescent cells are simply cells that have become damaged or have reached their maximum number of divisions. Normally these cells are shut down by a kind of self destruct program inside the cell, ready to be disposed of by the immune system.

Continue reading “Senolytics – Taking Out The Trash Might Keep You Fit And Healthy” »

Since our launch in 2016, Vector has focused on connecting space startups and innovators with affordable and reliable space by dramatically increasing access and speed to orbit. And as a result, Vector is reshaping the multi-billion launch market. Building on over 10 years of research to develop the Vector-R launch vehicle, Vector is truly at the forefront of innovation and revolutionizing the next generation of rocket launches. George Washington University has developed ground-breaking plasma steering thrusters which will help put Vector ahead in the great “New Space” race. Our collaboration with George Washington University will help us move closer to achieving our long-term vision of furthering the technological achievements for our industry.

Through this agreement, Vector will license the plasma thruster technology created by the School of Engineering and Applied Science at George Washington University for the Vector-R launch vehicle. The technology will allow us to propel miniature satellites, which are significantly less expensive and made from common materials, and control them while in space. As part of the collaboration, Vector will develop the thruster for commercial space use, and the University will continue to develop the next generation of the technology.

Small spacecraft and satellites are extreme ly difficult to maneuver and control once in space, and George Washington University’s plasma thruster technology helps us manage this problem. The thrusters use titanium as a propellant, which is converted into a gas-like plasma to provide propulsion. The plasma then accelerates and expands into a vacuum at high velocities to produce thrust. This thrust helps the craft overcome drag and maintain the small satellite’s orbit. We plan to use the technology as part of our launch system dedicated to micro spacecraft.

Continue reading “GWU’s Innovations in Electric Propulsion Technology Help Vector Provide Unprecedented Access to Space” »

What does the New Year have in store for #CRISPR? This blog presents 5 CRISPR-enabled breakthroughs to look for in 2017. (Partner content via Synthego)

An out-of-body experience is the key to being chill with your inevitable doom.