Tag: images

TreeJuxtaposer

Structural comparison of large trees is a difficult task that is only partially supported by current visualization techniques, which are mainly designed for browsing. We present TreeJuxtaposer, a system designed to support the comparison task for large trees of several 100K nodes. We introduce the idea of “guaranteed visibility”, where highlighted areas are treated as landmarks that must remain visually apparent at all times. We propose a new methodology for detailed structural comparison between 2 trees and provide a new nearly-linear algorithm for computing the best corresponding node from one tree to another. In addition, we present a new rectilinear Focus+Context technique for navigation that is well suited to the dynamic linking of side-by-side views while guaranteeing landmark visibility and constant frame rates. These 3 contributions result in a system delivering a fluid exploration experience that scales both in the size of the dataset and the number of pixels in the display. We have based the design decisions for our system on the needs of a target audience of biologists who must understand the structural details of many phylogenetic, or evolutionary, trees. Our tool is also useful in many other application domains where tree comparison is needed, ranging from network management to call graph optimization to genealogy.

Multiverse

you don’t need exotic theories to conjure multiverses. standard cosmology postulates that all possible quantum states (10^10^150), or world histories, actually play out. therefore, elvis is still alive (somewhere).
2007-01-28:

nice visualization of the multiverse.
2009-01-22: galaxy clusters racing at up to 1000 km / s – far faster than our best understanding of cosmology allows. Stranger still, every cluster seems to be rushing toward a small patch of sky between the constellations of Centaurus and Vela.
2012-01-23:

Recent theoretical works have shown that matter swapping between 2 parallel braneworlds could occur under the influence of magnetic vector potentials. In our visible world, galactic magnetism possibly produces a huge magnetic potential. As a consequence, this paper discusses the possibility to observe neutron disappearance into another braneworld in certain circumstances. The setup under consideration involves stored ultracold neutrons – in a vessel – which should exhibit a non-zero probability p to disappear into an invisible brane at each wall collision. An upper limit of p is assessed based on available experimental results. This value is then used to constrain the parameters of the theoretical model. Possible improvements of the experiments are discussed, including enhanced stimulated swapping by artificial means. The leap from our universe to another is theoretically possible. And the technology to test the idea is available today

that experiment sounds like nobel prize material.
2013-04-03: as good as any (perhaps even on the better side) episode of minutephysics

2015-05-28:

many physicists have come to doubt the very logic of nature’s laws. Increasingly, they worry that our universe might just be a random, rather bizarre permutation among uncountable other possible universes — an effective dead end in the quest for a coherent theory of nature

2015-08-11:

“A lot of people claim that you can never empirically test a claim like the multiverse because by definition you can only see what’s in our universe. But I think that’s much too quick.” Certain fundamental laws, which we can empirically prove in our own universe, might mathematically predict the existence of other universes. These laws would therefore be indirect, but compelling evidence of the existence of other universes.

Saturn

In Saturn’s Shadow

2007-03-27: Hexagon on Saturn

Just a few months after the Cassini spacecraft imaged an eyeball-shaped storm at Saturn’s south pole, the orbiter has captured new images of this bizarre hexagon-shaped weather pattern at the north pole

Role players? 🙂
2013-10-17: Stunning indeed. Looking forward to the tourist trip there someday.


2013-12-31: Dayum, that’s pretty.

2013-12-31: Cassini crashing into Saturn. This should yield some amazing pictures.