Search found 2245 matches
- Fri Apr 29, 2016 2:32 pm
- Forum: General
- Topic: A revival of Newton's theory of gravitation
- Replies: 1
- Views: 3237
A revival of Newton's theory of gravitation
A revival of Newton's theory of gravitation http://mnras.oxfordjournals.org/content/282/3/763.full.pdf ABSTRACT It is shown that a central gravitational field can equally well be described by Newtonian theory as by general relativity theory. It is only necessary to modify Newtonian theory to satisf...
- Wed Apr 20, 2016 8:51 pm
- Forum: Theory
- Topic: Unruh Radiation explains fly-by anomaly and EM Drive?
- Replies: 3
- Views: 12098
Re: Unruh Radiation explains fly-by anomaly and EM Drive?
https://www.technologyreview.com/s/601299/the-curious-link-between-the-fly-by-anomaly-and-the-impossible-emdrive-thruster/#/set/id/601302/ I see no implications for Mach Effect. From the link above: According to McCulloch, inertia is simply the pressure the Unruh radiation exerts on an accelerating...
- Tue Apr 19, 2016 1:13 pm
- Forum: Design
- Topic: Fold-up Polywell
- Replies: 10
- Views: 19097
Re: Fold-up Polywell
Well, the first one won't work. I assume that you are referring to N vs S directions. Yes, the facet arrangement will need to allow all inward (or outward) poles (even if with the expense of intercoil gaps and "funny" cusps). But the general idea of rapid rotational compression has a certain steam-...
- Sat Apr 16, 2016 4:31 am
- Forum: Design
- Topic: Fold-up Polywell
- Replies: 10
- Views: 19097
Re: Fold-up Polywell
For those really long trips you'll need to maximize your packing efficiency...
https://www.youtube.com/watch?v=KKs9vkYxAps
http://www.mathematicaguidebooks.org/so ... ding_t.mov
https://www.youtube.com/watch?v=KKs9vkYxAps
http://www.mathematicaguidebooks.org/so ... ding_t.mov
- Thu Apr 14, 2016 3:58 am
- Forum: Design
- Topic: Fold-up Polywell
- Replies: 10
- Views: 19097
Re: Fold-up Polywell
As an exercise in geometry, this may be interesting. But for a real reactor it is ,um, meaningless. Keep in mind that each magnet face is a separate assembly that has to have cooling plumbing, power leads, structural supports (against the powerful repulsion between all magnets, a robust and cooled ...
- Wed Apr 13, 2016 2:06 pm
- Forum: Design
- Topic: Fold-up Polywell
- Replies: 10
- Views: 19097
- Wed Apr 13, 2016 1:35 pm
- Forum: Design
- Topic: Fold-up Polywell
- Replies: 10
- Views: 19097
Re: Fold-up Polywell
You're right. I should have viewed it with IrfanView (hit 'G' to stop animation). The solution seems obvious... Conform the coils to lie in nested spherical shells, with small differences in diameters. But that may not work either since the triangles seem to hit near the corners, where the pivots ar...
- Tue Apr 12, 2016 6:02 pm
- Forum: Design
- Topic: Fold-up Polywell
- Replies: 10
- Views: 19097
Fold-up Polywell
When you need to travel with a fusion reactor in your carry-on bag... http://www.polyhedra.jp/polyhedron/js/anm06_01.gif http://www.polyhedra.jp/polyhedron/js/anm12_01.gif (From http://www.polyhedra.jp/polyhedron/js/zindex.html ) The coils for these arrangements interfere if you try to fold them... ...
- Mon Apr 11, 2016 1:42 pm
- Forum: Design
- Topic: Metal Foam Shielding of X-rays, Gamma Rays, Neutrons
- Replies: 3
- Views: 11427
Re: Metal Foam Shielding of X-rays, Gamma Rays, Neutrons
Thought it seemed familiar...
viewtopic.php?f=4&t=2152&p=39936
Same lead PhD.
I'd forgotten about the borated water option for filling the foam cells.
viewtopic.php?f=4&t=2152&p=39936
Same lead PhD.
I'd forgotten about the borated water option for filling the foam cells.
- Sun Apr 10, 2016 5:17 am
- Forum: Design
- Topic: Metal Foam Shielding of X-rays, Gamma Rays, Neutrons
- Replies: 3
- Views: 11427
Metal Foam Shielding of X-rays, Gamma Rays, Neutrons
Study Finds Metal Foams Capable of Shielding X-rays, Gamma Rays, Neutron Radiation
https://news.ncsu.edu/2015/07/rabiei-foam-rays-2015/
https://news.ncsu.edu/2015/07/rabiei-foam-rays-2015/
- Sun Apr 10, 2016 5:01 am
- Forum: News
- Topic: Room-temperature superconductivity?
- Replies: 1893
- Views: 686358
Re: Room-temperature superconductivity?
Anomalous results observed in magnetization of bulk high temperature superconductors—A windfall for applications
http://scitation.aip.org/content/aip/jo ... /1.4945018
http://scitation.aip.org/content/aip/jo ... /1.4945018
- Fri Apr 08, 2016 12:58 pm
- Forum: News
- Topic: Polywell patent publication by Joel Rogers
- Replies: 1
- Views: 3932
Re: Polywell patent publication by Joel Rogers
What will it take to get him to use field-conforming coil casings?
- Thu Apr 07, 2016 2:35 pm
- Forum: General
- Topic: Skynet is coming.
- Replies: 802
- Views: 405229
Re: Skynet is coming.
1. Buy up all the Taser stock (NASDAQ: TASR).
2. Induce (or capacitate) Skynet to become an addict.
(Edit: added faster addiction method)
3. We are back in control.
2. Induce (or capacitate) Skynet to become an addict.
(Edit: added faster addiction method)
3. We are back in control.
- Tue Apr 05, 2016 4:04 pm
- Forum: Design
- Topic: Tougher iron-based metallic glass
- Replies: 0
- Views: 19302
Tougher iron-based metallic glass
Maybe useful for pulsed magnets/reactors --
Shock Wave Response of Iron-based In Situ Metallic Glass Matrix Composites
http://www.nature.com/articles/srep22568
Shock Wave Response of Iron-based In Situ Metallic Glass Matrix Composites
http://www.nature.com/articles/srep22568
- Sun Apr 03, 2016 5:09 am
- Forum: Design
- Topic: Flat boron is a (cold!) superconductor
- Replies: 0
- Views: 20628
Flat boron is a (cold!) superconductor
Flat boron is a superconductor http://phys.org/news/2016-03-flat-boron-superconductor.html Superconductivity in two-dimensional boron allotropes http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.014502 Have ribbons of this stuff (refined to be mostly 11Boron) running through liquid hydrogen ...