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n some semiconducting nanocrystals one photon can release two or three electrons, hence the term avalanche effect. This could theoretically lead to a maximum output of 44 percent in a solar cell comprising the correct semiconducting nanocrystals.

We report a new record power conversion efficiency of 3.5% for inkjet printed

good source for Macs - and coming from the Leiden University!

The object being imaged or stimulated with subwavelength accuracy does not need to be in the immediate proximity of the superlens or field concentrator: an optical mask can be designed that creates constructive interference of waves known as superoscillat

This is a bibliography management system one of my project partners suggested. I (Tobias) am trying it out in the frame of the project. If you do not hear anything from me, it was probabely not sooo successfull...

Velcro made of steel, capable of sustaining 800Celsius.

watch the live streaming of TEDxAmsterdam

Each year the dutch NSA (AIVD) comes out with a christmas puzzle (never knew) which consists of 20 severe cryptic questions. Unfortunately, all the questions are in Dutch :( I solved 3 at the moment...

Whether society embraces face recognition on a larger scale will ultimately depend on how legislators, companies and consumers resolve the argument about its singularity. Is faceprinting as innocuous as photography, an activity that people may freely perform? Or is a faceprint a unique indicator, like a fingerprint or a DNA sequence, that should require a person's active consent before it can be collected, matched, shared or sold?

Dr. Atick is firmly in the second camp.

Actually these sort of things are also quite easy to exploit. Print a picture of Osama bin Laden on your t-shirt and have the entire police force scared out of their wits.

I saw so many bin laden t-shirts already ... they must have better filters than this

Interesting to see the size of the tree doesn't influence the amount of wind it can stand against. Of particular interest to know when you can have a tree falling in your house/car here in the Netherlands

Inspired by the work that was done at the ACT, I continued working on optical flow landing at TU Delft. Today Bio & Bio published my article on a new theory that allows drones to see distances with a single camera. It shows that drones approaching an object with an insect-inspired vision strategy become unstable at a specific distance from the object. Turning this weakness into a strength, drones can actually use the timely detection of that instability to estimate distance. The new theory will enable further miniaturization of autonomous drones and provides a new hypothesis on flying insect behavior. Video: https://www.youtube.com/watch?v=Fm7SMJp8EA4&feature=youtu.be Article: http://iopscience.iop.org/article/10.1088/1748-3190/11/1/016004