[QUOTE=Fusion_power;350039]On the stress tensor and gravity subject, isn't anyone going to discuss this paper? [url]http://arxiv.org/abs/gr-qc/9909087[/url][/QUOTE]Thanks for drawing my attention to it. I'll download it and study it, though I can't promise to be able to understand it well enough to be able to paraphrase in non-mathematical language. I'm very much an amateur at GR.

Paul

/begin OT/

The summary of the paper is proof that:
1. gravity propagates at the speed of light.
2. Any system with one body in orbit around another such as the sun and earth proves that the (earth) always points toward where the (sun) will be, not where it is and not where it was.
3. The effect of this is to cancel out the positional lagging that might be inferred from an analysis of the 8 minute delay caused by earth-sun distance of separation.
4. In a system where one body is presumed stationary and another is accelerating relative to the stationary gravity source, the lagging propagation due to Cg is canceled out entirely by the frame leading effects where the accelerating body vector is toward the future position of the stationary object.
5. If the accelerating object suddenly stops, then the vectors cancel out and the gravitational direction is toward the stationary object.

By extension and this is my own reasoning, this shows how a gravitational slingshot must work in a 3 star system where one of the stars is accelerated above escape velocity by interaction with the other two stars. Two of the stars must be robbed of orbital energy and two of the stars must move closer together as a result of the energy loss. One of the stars must gain the energy displaced from the other two stars. The vectors should prove that one of the possible results is that the star that gains energy must leave the system. There are plenty of trinary systems to study, maybe we should analyze them to see if any are close to ejecting one of their members?

/end OT/

[OT]
 

OT

[QUOTE=Fusion_power;350039]

On the stress tensor and gravity subject, isn't anyone going to discuss this paper? [URL]http://arxiv.org/abs/gr-qc/9909087[/URL]

[/QUOTE]

[QUOTE=xilman;350050]Thanks for drawing my attention to it. I'll download it and study it, though I can't promise to be able to understand it well enough to be able to paraphrase in non-mathematical language. I'm very much an amateur at GR.

Paul[/QUOTE]

[QUOTE=Fusion_power;350068]/begin OT/

The summary of the paper is proof that:

< snip >

/end OT/[/QUOTE]

I've started a new thread ("Aberation and the Speed of Gravity") for this discussion in the Science & Technology subforum at [url]http://www.mersenneforum.org/showthread.php?p=350087#post350087[/url][URL="http://www.mersenneforum.org/showpost.php?p=350087"][/URL]

[QUOTE=Fusion_power;350039]My daughter is struggling with student loans. Fortunately, not a lot, $16k so she can work her way out. I contributed about $30,000 toward her expenses over 4 years and she worked at a minimum wage job the entire time she was in class. Still, she had to take out some loans to make the tuition and cost of books. So for me, this article strikes pretty close to home.

[URL]http://www.rollingstone.com/politics/news/ripping-off-young-america-the-college-loan-scandal-20130815[/URL]

The most telling part of the article is that students have no way to go to college without taking out student loans, have no way to pay them back once they graduate because the job market is so futzed, have no way to relieve the debt through bankruptcy, and can't get a decent job without a college degree. Full circle.[/QUOTE]

[QUOTE=kladner;350047]Debt peonage at its finest! Get 'em while they're young! They have time to pay LOTS of interest before they die. Better still, unlike debtors' prison, they have to pay their own upkeep. Bonus!:yucky:

Taibbi is probably the best commentator on and investigator of the cesspit of banking and investment. :sick:[/QUOTE]Also let's not forget that for-profit schools might play fast-and-loose with a manufactured illusion of jobs: [URL="http://www.huffingtonpost.com/2013/08/19/career-education-corp-settlement_n_3782418.html"]Career Education Corp. Reaches $10 Million Settlement In Investigation Of Bogus Job Placements[/URL][QUOTE]The settlement is one of the largest restitution funds created for students [B]allegedly[/B] defrauded by a for-profit college. The California Attorney General's Office reached a settlement with Corinthian Colleges Inc. in 2007 that resulted in a $5.8 million restitution fund.[/QUOTE]My bolding on "allegedly" because I am a crusty crab with a peeve or twenty-two. In other news, the SEC has [B]finally[/B] achieved a settlement that includes an admission of wrongdoing. Prosecutions may still be a bridge too far, but lowly peons may take some small satisfaction anyway: [URL="http://www.huffingtonpost.com/2013/08/19/philip-falcone-banned_n_3781381.html"]Philip Falcone Barred From Securities Industry For 5 Years In $18 Million Settlement[/URL][QUOTE]The $18 million-plus settlement forces Falcone and Harbinger Capital to admit wrongdoing and bars Falcone from working in the securities industry for a minimum of 5 years, according to the SEC.

Falcone, who was worth an estimated $1.2 billion as of March, will pay around $11.5 million of the settlement, and Harbinger Capital will pay $6.5 million. From Reuters:[QUOTE]Falcone will be banned from associating with brokers, dealers, investment advisors and other types of financial firms for five years, after which he will be able to reapply for a license to operate. During that period he will be allowed to help with the liquidation of Harbinger under the supervision of an independent monitor, the announcement said.[/QUOTE][/QUOTE]

Larry Summers and the Secret "End-Game" Memo -Greg Palast
 

[B][URL="http://us4.campaign-archive2.com/?u=33e4ec877eed6a43863a4a92e&id=78d25d8b46&e=b33afe435c"]More dirt[/URL][/B] from one of my favorite muckrakers.

[URL="http://it.slashdot.org/story/13/08/22/1733207/nasdaq-trading-halted-due-to-technical-issue"]NASDAQ Trading Halted Due To "Technical Issue"[/URL]....

[QUOTE=chalsall;350537][URL="http://it.slashdot.org/story/13/08/22/1733207/nasdaq-trading-halted-due-to-technical-issue"]NASDAQ Trading Halted Due To "Technical Issue"[/URL]....[/QUOTE]There was another program trading problem Tuesday: [URL="http://dealbreaker.com/2013/08/goldmans-h-through-l-option-trading-computer-had-a-rough-day-yesterday/"]Goldman’s H-Through-L Option Trading Computer Had A Rough Day Yesterday[/URL]. I almost mentioned it but, by itself, it seemed too much like grousing; now with the other stuff happening it's worth mentioning too. Goldman Sachs got a nice do-over on trades for $1 when the market was $3. How would that type of trade error pass the simplest sanity filter anyway?

Greece is back in the news today after talks to get another 10 billion euros followup to their already huge 250 billion euro tab. A BOTN (back of the napkin) evaluation says they will need another 50 billion euros over the next 4 years. Meanwhile, Spain is in a slow burn, Portugal is on life support, and Cyprus is recovering from a bank crash (not to be confused with a plane crash, a bank crash is far more devastating). The news says that most of the rest of the ECM is officially out of recession as of last year.

On a different note, I purchased a car today for $7000. It is a 2003 Chevrolet Impala with 13,870 miles on the odometer. The car has leather interior, keyless entry, and power windows and seats. This is literally someone's grandma's car that was used to go to the grocery store and the doctor. My last car purchase was 4 years ago for a nice buick lesabre with 89,000 miles at $3000. Since this is thread is all about economy, I thought I would say that my personal economy is much improved from 2007. I'm still a chintz when it comes to purchasing cars, only buying when I get a very good deal and can pay with cash. It helps that I can sell the buick lesabre for nearly as much as I paid 4 years and 35,000 miles ago.

DarJones

[URL="http://www.bloomberg.com/news/2013-08-27/currency-spikes-at-4-p-m-in-london-provide-rigging-clues.html"]Currency Spikes at 4 P.M. in London Provide Rigging Clues[/URL][QUOTE]The same pattern -- a sudden surge minutes before 4 p.m. in London on the last trading day of the month, followed by a quick reversal -- occurred 31 percent of the time across 14 currency pairs over two years, according to data compiled by Bloomberg. For the most frequently traded pairs, such as euro-dollar, it happened about half the time, the data show.[/QUOTE]

[QUOTE=ewmayer;351441]o Continuing our "India watch" theme from last week, Mish has a very sobering perspective ...[/QUOTE]You know, I really can't decide whether Mish is a re-incarnation of Cassandra or a member of the Latter Day Club of Rome.

Each tragic in their own way.

Love the cartoon!