Search found 2245 matches

by DeltaV
Fri Apr 29, 2016 2:32 pm
Forum: General
Topic: A revival of Newton's theory of gravitation
Replies: 1
Views: 3234

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...
by DeltaV
Wed Apr 20, 2016 8:51 pm
Forum: Theory
Topic: Unruh Radiation explains fly-by anomaly and EM Drive?
Replies: 3
Views: 12075

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...
by DeltaV
Tue Apr 19, 2016 1:13 pm
Forum: Design
Topic: Fold-up Polywell
Replies: 10
Views: 19054

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-...
by DeltaV
Sat Apr 16, 2016 4:31 am
Forum: Design
Topic: Fold-up Polywell
Replies: 10
Views: 19054

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
by DeltaV
Thu Apr 14, 2016 3:58 am
Forum: Design
Topic: Fold-up Polywell
Replies: 10
Views: 19054

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 ...
by DeltaV
Wed Apr 13, 2016 2:06 pm
Forum: Design
Topic: Fold-up Polywell
Replies: 10
Views: 19054

Re: Fold-up Polywell

by DeltaV
Wed Apr 13, 2016 1:35 pm
Forum: Design
Topic: Fold-up Polywell
Replies: 10
Views: 19054

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...
by DeltaV
Tue Apr 12, 2016 6:02 pm
Forum: Design
Topic: Fold-up Polywell
Replies: 10
Views: 19054

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... ...
by DeltaV
Mon Apr 11, 2016 1:42 pm
Forum: Design
Topic: Metal Foam Shielding of X-rays, Gamma Rays, Neutrons
Replies: 3
Views: 11392

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.
by DeltaV
Sun Apr 10, 2016 5:17 am
Forum: Design
Topic: Metal Foam Shielding of X-rays, Gamma Rays, Neutrons
Replies: 3
Views: 11392

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/
by DeltaV
Sun Apr 10, 2016 5:01 am
Forum: News
Topic: Room-temperature superconductivity?
Replies: 1893
Views: 683011

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
by DeltaV
Fri Apr 08, 2016 12:58 pm
Forum: News
Topic: Polywell patent publication by Joel Rogers
Replies: 1
Views: 3931

Re: Polywell patent publication by Joel Rogers

What will it take to get him to use field-conforming coil casings?
by DeltaV
Thu Apr 07, 2016 2:35 pm
Forum: General
Topic: Skynet is coming.
Replies: 802
Views: 403509

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.
by DeltaV
Tue Apr 05, 2016 4:04 pm
Forum: Design
Topic: Tougher iron-based metallic glass
Replies: 0
Views: 19282

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
by DeltaV
Sun Apr 03, 2016 5:09 am
Forum: Design
Topic: Flat boron is a (cold!) superconductor
Replies: 0
Views: 20620

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 ...