Physics

Category archives for Physics

Why Fortran Lives

Julia is a nifty new language being developed at MIT I stole this plot from github, it shows Julia’s current performance on some standard benchmarks compared to a number of favourite tools like Python, Java and R. Normalized to optimized C code. And, there, in a single plot, is why Real Programmers still use Fortran…!

Backreactions

A frightening fraction of my open tabs are some of Bee’s posts at Backreaction – so to save my browsers, I dump them here for further future perusal: Are irreproducible scientific results okay and just business as usual? Shut up and let me think Should the Nobel Prize be given to collaborations and institution? Women…

Hubble Plateaus

In times past we have lovingly tracked the proposal frenzy as the near annual Hubble Space Telescope proposal deadline approaches. As was noted by Julianne several years ago, and confirmed over the last half dozen cycles, the shape of the curve of number of submitted proposals as a function of time until the deadline is…

The Curl of Space

Imagine you were a very clever ant, living on a large log, floating in a big lake… …a very large, deep, cold lake. Being a not incurious, clever ant, you contemplate the lake in its infinite and insurmountable vastness. Surely knowing what lies on the lake, or even beyond the lake (if such can be…

You are at university. Do you like stars, and stuff? We revisit old ruminations on career paths ’cause it is topical… Another rehashed blast from the past. Should you do astronomy as an undergrad? (the following is in part shamelessly cribbed from a colleague’s previous freshman seminar for our majors): Do you like stars and…

The Lights Are Going Out…

When it is darkest, men see the stars. This afternoon I needed to check something urgently, and as is my habit in this day and age, I jumped to a website where I knew the information was available. A few seconds later, with some irritation I went to hit “refresh” as the request failed to…

Black Holes: Live Firewalls

The Kavli Institute for Theoretical Physics is currently holding a “Rapid Response Workshop” on Black Holes: Complementarity, Fuzz, or Fire?, August 19-30. Organizers: Raphael Bousso (UCB), Samir Mathur (OSU), Rob Myers (PI), Joe Polchinski (KITP), Lenny Susskind (Stanford) The lunch talk today is Lenny Susskind “Inside Black Holes” That talk will be available on video,…

Is the general audience “black board” talk at KITP today, giving an overview of the quantitative approches to morphogenesis program currently unverway. Symmetry breaking and mechanics. The Kavli Institute for Theoretical Physics runs parallel programs and currently there is a biophysics program New Quantitative Approaches to Morphogenesis concurrent with the astrophysics program on A Universe…

Lawrence Krauss just wrote an interesting letter: “Higgs Seesaw Mechanism as a Source for Dark Energy” – Krauss & Dent, PRL 2013 in it he argues for a see-saw mechanism in the Higgs sector which gives a natural scale for dark energy which is small, as observed. The key point is that the energy scale…

Final day of the “A Universe of Black Holes” workshop with a session: “Modeling Black Hole Accretion and Outflows” – all MHD sims today… Chris Reynolds (Univ. of Maryland) starts with – The temporal variability of model accretion disks Had to miss this. Go check it online, Chis gives fab talks. Julian Krolik (JHU) “The…