Ampersand of the Day

Hot on the heels of Celtic comes the ele­gant amper­sand of Encoder Medium. Also check out the mas­sive Encoder Fat.


Ampersand of the Day

Today’s amper­sand is brought to you by RM Celtic. It’s a fusion of the let­ters “E” and “T” from that font.


Windows of Opportunity – ENBW

When you search online for ENBW you’ll likely find a list of sites related to EnBW AG, a Ger­man energy giant (which, on a totally unre­lated note, we were a cus­tomer of until recently). While energy is quite rel­e­vant in the con­text of this post, EnBW has noth­ing to do with it. This post is


Track This

Since I have an account with face­book, LinkedIn, flickr, xing and who knows where else, I’m prob­a­bly not expected to be too con­cerned about per­sonal data pri­vacy. But sur­pris­ingly I am. How­ever, some of the ben­e­fits of par­tic­i­pat­ing on these sites (poten­tially) out­weigh the draw­backs of giv­ing out per­sonal infor­ma­tion. Also, on most sites, I


Résumé Tuning

Let­zte Woche war unglaublich erfol­gre­ich, was die inter­na­tionale Anerken­nung meiner Forschungsar­beit in den ver­gan­genen Jahren angeht. Nicht nur bin ich vom Inter­na­tional Biog­ra­phy Cen­tre zu einem der Top 100 Sci­en­tists 2011 gekührt wor­den. Nein, nur wenige Tage später grat­ulierte mir ein Brief vom Amer­i­can Bio­graph­i­cal Insti­tute zum Sci­en­tific Award of Excel­lence 2011.


Windows of Opportunity

Some­times sig­nals can be stub­bornly non-periodic. This can make dig­i­tal sig­nal pro­cess­ing so much more annoy­ing. The sup­pos­edly sim­ple act of plot­ting the spec­trum ends up being a game of trial-and-error, or requires mak­ing a deci­sion that involves prior knowl­edge of what one would actu­ally like to know in the first place. We’ll have a


Scalar Diffraction – Fourier

In an ear­lier post we had a look at var­i­ous dif­frac­tion for­malisms that either orig­i­nated in the Huygens-Fresnel prin­ci­ple or led to essen­tially the same results. The prin­ci­ple mod­eled a field dis­tri­b­u­tion in a aper­ture (or on a sur­face) as a source of infi­nitely many spher­i­cal waves whose ampli­tudes and phases were pre­scribed by the


Nature Photonics

After what seems (to me) to have been sev­eral eons worth of exper­i­ment­ing, writ­ing, re-writing, re-experimenting, more re-writing and then some more re-writing (all of which mostly by oth­ers), the all-optical FFT idea that was used at the IPQ depart­ment at KIT finally made it into Nature Pho­ton­ics. When I got there in late ’09,


MATLAB anonymous functions

MATLAB is a pro­gram­ming envi­ron­ment I’ve been using for maybe eight or nine years. For most of this time I made use of anony­mous func­tions, but I have to admit with­out really know­ing what I was doing. I just copy-paste-modified the exam­ples in the fzero and quad doc­u­men­ta­tion and hoped they would some­how work. Which,


Scalar Diffraction – Imagery

In this post on the prin­ci­ples of scalar dif­frac­tion there were quite a num­ber of inte­gral expres­sions for dif­frac­tion of light, start­ing from the Huygens-Fresnel prin­ci­ple and apply­ing var­i­ous degrees of approx­i­ma­tion. Inte­gral for­mu­la­tions are usu­ally very abstract and not very illus­tra­tive. How­ever, with today’s avail­able com­puter power we can turn these inte­grals into…