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Comment: You should try learning English (Score 1) 227

by peter303 (#43783967) Attached to: Australia Makes Asian Language Learning a Priority
"Chinese" is a perfect acceptable English name of the national language of China. It has several other meansing too. In China they call it the Peking Dialect, the Northern Dialect, The National Languge, The Common Speech, and The Middle language among other names, beiyu, guoyu, putonhua, zhongweng, hanyu.

Comment: why no dark matter black holes? (Score 1) 44

by peter303 (#43774233) Attached to: Dark Matter, WIMPS, and NASA's Alpha Magnetic Spectrometer Data
If dark matter only reacts to gravity, why doesnt collapse into hgh density clumps over the eons? Ordinary matter is stopped from doing this by the electronmagnetic repulsion of atoms for masses less than a few hundred Jupiters and by hadronic stong force for less than couple Suns.

We would definately notice dark matter signularities, since there is six times more of it than the non-dark kind.

Comment: more antimatter near Earth than expected (Score 2) 44

by peter303 (#43773123) Attached to: Dark Matter, WIMPS, and NASA's Alpha Magnetic Spectrometer Data
The PAMELA probe sees antiprotons in the Van Alen belts. The ISS-AMS sees more positrons than expected. Whatever the ultimate expanation, its interesting to see these surpluses.

The amounts are so small, dozens of protons for PAMELA and hundreds of thousands of positrons for AMS, that they would not be noticeable in human life.

Comment: deja vu all over again (Score 1) 115

by peter303 (#43742967) Attached to: Google's House of Cards
As a cousin of mine is accused of saying. Motifs come, leave and return in computer science as in any other discipline. Bill Atkinsons HyperCard was vey good. Web browser URLs supplanted this several later. But URLs never really captured the geometric metaphors possible in Bill's systems (chains, grids, loop, decks, etc.) .

Comment: "we've done this for years" U-of-Phoenix Prof (Score 1) 122

by peter303 (#43731795) Attached to: Georgia Tech and Udacity Partner for Online M.S. in Computer Science
I listened to a MOOC talk by an enthusiastic state-school tenured professor last year. Then a a Univeristy of Phoenix professor in the audience arose and said they had been doing these online courses for years. They have some idea of what video and chatroom techniques work and dont work and all the cheating that goes on. The Couseras of the world are re-inventing the wheel this professor claimed. Although for-profit schools are dismissed for their fnancial sleaziness, they do have a point.And wehen the venture capitalists demand their "pound of flesh" will the Courseas be any less sleazt than the existing for-profit online schools? I am hoping for "best of both worlds" result, a merger of both best experiences.

Comment: polar shift is a branch of geophysics (Score 2) 482

by peter303 (#43731713) Attached to: Global Warming Shifts the Earth's Poles
There have been several papers on the topic every year in the geodesy section of the American Geiphysical Union meetings. Earthquakes, ice sheet melting, mantle convention velocity changes, seasonal ocean storms all cause mass shifts int he earth and a slight change in pole position. Before satellite GPS geophysicists used Very Long Baseline radio telecscope inferometry of quasars to measure pole position. VLBI is essentially a "galactic GPS" but more expensive than satellite GPS methods.

A closely related geophhyscial measurement is Length-of-Day, that is the time between repeat viewing of stars which varies nanoseconds per day and milliseconds per year. All the same large earth mass-moveoments that shift poles also change Length of Day.

Comment: completely unconsitituion (Score 2) 555

by peter303 (#43720591) Attached to: N. Carolina May Ban Tesla Sales To Prevent "Unfair Competition"
A US state cannot arbitrarily ban a good or service from another state in Article 1, sections 9 & 10. Only the federal government has this power to regulate interstate trade. This was one fears during the early years of United States that states might shut out each other, so it was banned.

The bug starts here.

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