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Humancafe
| | Posted on Wednesday, October 29, 2008 - 07:22 pm: | |
This is a continuation of Post Scripts, so let us know what you think, or where you're from if just visiting. This page will remain open when forums are archived. Of if shy, send an email: humancafe@aol.com Cheers. |
   
Crusoe's island Posted From: 69.228.34.8
| | Posted on Saturday, November 01, 2008 - 11:24 am: | |
Postcard from Robinson Crusoe's island: Dig finds camp of 'real Crusoe'
My favorite story as a child first learning to read... in French.
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Cairo's Al-Azhar Park Posted From: 69.228.46.9
| | Posted on Tuesday, November 04, 2008 - 12:03 am: | |
Old Cairo's Darb al Ahmar coming back to life. Scenes from Old Cairo, Darb al Ahmar I visited this area of Old Cario with a friend back twenty years ago, where we got one of those famous Egyptian haircuts, very short, finished off with a razor sharp string treatment to remove facial hairs... Ouch! It hurt! But I have a fond memory of it all, and am so glad to see it being restored from what once was the poorest section of Cairo into an area of rehabilitation, thanks in part to the Aga Khan Trust for Culture, which was instrumental by Lord Aga Khan in creating a beautiful green People's Park over what once was a 500 year old dump for the city, the 74 acre Al-Azhar Park. Here are some more street scenes in Darb al Ahmar:
, |  | (interactive) The People's Park, for a small fee, is available for all visitors from Cairo, or outside. Along its western boundary is an important archeological site, the ancient 13th century wall, now restored, as part of the Citadel.
quote:Located on the western side of the park are the old Fatimid city and its extension Darb Al Ahmar, with their wealth of mosques, madrasas and mausolea, signaled by a long line of minarets. To the south are the Sultan Hassan Mosque and its surroundings, as well as the Ayyubid Citadel. On the eastern side is the City of the Dead with its many social welfare complexes sponsored by the Mamluk Sultans and dignitaries, which became an area that developed into a dense neighborhood of its own. This area was indeed in great need of an open green space. The hilly topography of the site, formed by debris accumulated over centuries, now provides elevated view points dominating the city and offers a spectacular 360° panorama over the townscape of historic Cairo.
(interactive - Al Maridani mosque) The Citadel of Cairo In a city that today is home to some 17 million people, this green park and revitalization going on is an important development for Egypt and its people. [A note of caution: Crime is not generally a problem in Cairo, but western women may be molested, which is annoying and disrespectful, as was our experience; also radical extremists have their own evil agenda, so be careful when visiting this fascinating city.] Salaam aleikom |
   
ePostcard HK Posted From: 69.238.208.136
| | Posted on Friday, November 14, 2008 - 09:07 pm: | |
ePostcard from a friend, Hong Kong
Click in image, slide and see difference, like night and day! ePostcard from a friend  |
   
Ancient Rome 3-D
| | Posted on Saturday, December 06, 2008 - 01:53 pm: | |
Ancient Rome in 3-D
(interactive) See it in 3-D with Google Earth
(interactive) Forum Romanum, National Geographics 3-D Visit ancient Rome as if you're there. |
   
Merry Christmas 2008
| | Posted on Wednesday, December 24, 2008 - 12:13 pm: | |
Beautiful Earthrise, 40 years ago on Christmas Eve of 1968.
(interactive - BBC) The first Earthrise to be witnessed by a human
quote:Back in 1948, the British astrophysicist Sir Fred Hoyle predicted that when spaceflight enabled us to see the whole Earth from space, the view would change us forever.
He was right. When we see the whole Earth from space, she is beautiful and only filled with light and peace. Merry Christmas 2008, in Peace. |
   
Slave girl shame
| | Posted on Monday, December 29, 2008 - 12:15 pm: | |
This pretty little Egyptian girl was a slave in America.
(interactive - Huffington Post)
quote:Her employers were not satisfied, she said. "Nothing was ever clean enough for her. She would come in and say, 'This is dirty,' or 'You didn't do this right,' or 'You ruined the food,'" said Shyima. She started wetting her bed. Her sheets stank. So did her oversized T-shirt and the other hand-me-downs she wore. While doing the family's laundry, she slipped her own clothes into the load. Madame slapped her. "She told me my clothes were dirtier than theirs. That I wasn't allowed to clean mine there," she said.
A Childhood in Slavery (includes video and pictures)
quote:IRVINE, Calif. (Dec. 29) -- Late at night, the neighbors saw a little girl at the kitchen sink of the house next door. They watched through their window as the child rinsed plates under the open faucet. She wasn't much taller than the counter and the soapy water swallowed her slender arms. To put the dishes away, she climbed on a chair.
Read it all. What civilized culture would allow such a vile slavery? A barbaric shame this happens in the 21st century. |
   
Freedom wins
| | Posted on Saturday, January 03, 2009 - 01:39 pm: | |
We are at war with those who would coerce us against our freedoms: http://www.humancafe.com/discus/messages/88/94.html#POST1491 "Freedom of thought, freedom over our bodies, freedom of sexual orientation, freedom of belief; all these must be put aside as issues (in my opinion they shouldn't even be issues, anymore than teaching evolution in schools), because fighting over these inherently innate freedoms interfere with the war into which we had been suddenly cast. There should be no question these freedoms are to exist. Freedom to coerce, on the other hand, must not be allowed anywhere, stopped completely, so those who would stop us in our beliefs, and our civil liberties, who would even kill us, must be stopped." Resist coercions with all your strength, fight all coercions against your human rights, for the right to fight coercions is your God given right. This war the Islamo-Barbarians cannot win. This is war they cannot win, and may not win, but this final war against the barbarians we must win for Freedom. anon |
   
Fraud Test
| | Posted on Saturday, January 17, 2009 - 12:28 pm: | |
ENRON - how markets failed the Fraud Test. See the whole of it, but here are the trailer videos: Enron the smartest guys in the room - Trailer
Enron traders conversation recorder
Markets fail two tests for Fraud if these two rules are violated:
1. Fraud when trust is broken through coercive collusion destroying the normal price function of exchange. 2. Criminal behaviors which coerce and deceive the markets are deregulated or otherwise not restricted by law. In the chapter on market exchange of Habeas Mentum, it says:
quote:"Through time, the reality that defines the then value of exchange also changes to suit the subjective and constantly shifting tastes and desires of demand, and the existing and changing ability to satisfy these demands. These changes, which result in constantly shifting market prices, are difficult to appraise without the entry of competitors eager and able to gain an advantage from the opportunities created by them. Thus, the advantage of a competitive exchange over one that is always decided upon by two individuals is that it allows other individuals to enter into the constantly shifting state of exchange and improve upon it to, in effect, contribute additional individual assessments of market conditions as they are then. The reward of this introduction of competitive assessments is that those assessments, which are most correct in relation to demand and how that demand can be most realistically and profitably satisfied, are those that will result in exchange. The price at which this exchange will take place is, consequently, that price that is most competitive and that cannot be improved upon, as assessed by all the participants involved and reduced from their individual decisions. Because it is the best possible price, or at least because it tends that way though it may not be perfect, it is also the most efficient price in relation to how things were then and to how the mind assessed them to be. An exchange is always a subjective human act judged by those individuals directly involved in it either by virtue of their demand or their ability to satisfy this demand; it is a price arrived at that is most relevant and correct then and there, to them. As in the case of our original two traders, because our knowledge is not always perfect, the competitive market environment tends to fill in those gaps that result from our failure to perceive all in our individual assessments. What we cannot see can be seen by another, as seen in another way or from a more advantageous perspective, and acted upon to correct our unintentional omission. That other, either through being more clever or better positioned, then contributes a price of exchange that is more advantageous and, thus, more an expression of real market value. Thus, without the need for superhuman intelligence, the competitive market is able to improve upon our individual shortcomings and arrive at a comparably efficient price at all times. Its constantly changing price then reflects the constantly changing aggregate of human decisions as these are made in response to their individual realities and to how these realities seek each other in agreement. The result is an agreed upon and correct state of exchange. ... So, for markets to be efficient, they do not have to be composed of many participants, but they do have to be free from coercion. A market in which exchange is restricted, because entry is prohibited or because the costs of exchange are too great, is a market in which will not be reflected the greatest price efficiency. When free from this coercion, whether or not the price then reflected is optimum will be determined by whether or not the conditions of exchange are then optimum. If there is undue risk, such as from theft or currency instability or from confiscatory measures, then the price will also reflect the concern for this risk; the price mark up will be higher as insurance compensating for this risk. Then, if the price so arrived at appears to be less than optimum, it is only a reflection of conditions as they then are; the market cannot be improved upon if the conditions of exchange are negative. Exchange by agreement, when free from coercion, only reflects the state of things as they are between individuals. It is the property of free markets that, when allowed to work efficiently, they always reflect things as they are; if these conditions are constructive and unrestrictive, then they reflect efficiently our human effort and productivity; if they are negative and coercive, plagued by undue risk and by disregard for the rights of the individual, then they reflect human inefficiency as forced from coerced labor. If we are not pleased with our results, the blame does not rest with the exchange mechanism; a free market reflects only human agreements. The correction of those conditions lies in correcting what the market is reflecting and not in correcting the market itself. If, however, it is the market that is being hindered from its free function as a reflection of agreements, then it fails as an efficient tool of interhuman exchange and as a reflection of things as they are; individuals must be free to form agreements. Coerced, it expresses reality only darkly and the myth that forces it to work poorly then becomes the new reflection of our social reality. That myth is then the attempt to change the reality of our human condition by forcing that which describes it for us; it is a form of social camouflage which masks what the aggregate of our human agreements is telling us. Then, through our social error, the market ceases to be an efficient social tool. A market not free cannot be efficient.
That includes a market "not free" from criminal behaviors and fraud. Once a market fails the Fraud Test, as happened in the Enron electricity market manipulations in California, then the market price is no longer reflecting the reality of the supply and demands of the market place. In the end, the whole market fails, and when the fraud is exposed, the participants behind the deceits and manipulations, or mythical profits, fail with the whole structure built up on fraud crashing down into bankruptcy. Why have we not learned our lessons from Enron in the recent banking crisis meltdowns? It was financialization run amok. The market in the end will always win. Criminal fraud can never be deregulated. |
   
Criminality test
| | Posted on Wednesday, January 28, 2009 - 01:40 pm: | |
The Battle of Gaza: http://www.jihadwatch.org/archives/024601.php
"The Gaza Operation and its Aftermath Hamas, learning from the HIzballah experience, turned Gaza into a civilian trap. It turned its children, journalists, foreign workers and innocent citizens into its shields, and its foreign institutions, mosques, schools and hospitals into arms depots. It turned Gaza’s underground into a complex web of tunnels which began or ended inside houses, and innocent-looking apartment buildings into deadly booby-traps. The tragic death of so many non-involved civilians and the destruction of so many non-military targets did not emanate from the will of the Israeli army to devastate them, but from the necessity to put an end to that rain of missiles which were launched from those houses. Israel set out to destroy depots of illegally smuggled in weapons, of ammunition and missiles, and the launching pads of the missiles. And if they happened to have been placed, purposely, by the Hamas in mosques, schools or apartment buildings, then those were hit and destroyed. Many media reports tried to evaluate the relative guilt on both sides of the divide by measuring the tragic amount of devastation, coming to the conclusion that since many more Palestinians lost their lives and much more Palestinian real estate was demolished, that meant that Israel was guiltier, acted “out of proportion”, and was even accused of genocide. It was as if after the German blitz on London and Coventry, the British would be blamed for flattening the city of Dresden on Valentine's Day, 1945, since in doing so they killed more “innocent” citizens and destroyed more real estate than did the Germans. To kill more does not make one a culprit, and to be killed more does not make one innocent. The judgment has to be made by the volume of fire and by the intention of its shooters. When the Hamas pointed those 7000 missiles to Israel, they were intended to fall in the center of cities and towns, and to kill whomever was hit. Most fell in the open, by chance or failure, not by design, and when their targets were hit, they found the citizens, who had been trained by frequent alerts, in the shelters which were built and prepared to protect them. That made for a minimum of casualties and of damages. In Gaza, all the millions were invested in weapons, not one penny for shelters. No provision was made to alert people or warn them. Hence the inordinate disproportion between the parties -- not the evil of the one and the innocent victimhood of the other. Quite the contrary, those who claim innocence were guilty of a priori sacrificing their civilian population, and those who are accused of wanton destruction took all the necessary precautions and risks of battling from house to house, instead of simply razing entire areas by artillery and air-force without taking any risk. A reporter of Al-Arabiya was caught on tape telling her editors on the telephone from the rooftop of the foreign correspondents building in Gaza that she saw a missile fired from the lower levels of the building. But her station only reported the denial of the foreign correspondents association to the effect that their building was hit by design of the Israelis. The same went for the UNRWA building." - by Raphael Israeli Read it all... When will we ever learn? Human shields shield no one, but are a crime against humanity. |
   
Born believers?
| | Posted on Friday, February 06, 2009 - 01:46 pm: | |
Natural born believers? Is it any wonder Earth's pantheistic religions are universal? Here is the NewScientist article: Born believers: How your brain creates God
quote:WHILE many institutions collapsed during the Great Depression that began in 1929, one kind did rather well. During this leanest of times, the strictest, most authoritarian churches saw a surge in attendance. This anomaly was documented in the early 1970s, but only now is science beginning to tell us why. It turns out that human beings have a natural inclination for religious belief, especially during hard times. Our brains effortlessly conjure up an imaginary world of spirits, gods and monsters, and the more insecure we feel, the harder it is to resist the pull of this supernatural world. It seems that our minds are finely tuned to believe in gods. Religious ideas are common to all cultures: like language and music, they seem to be part of what it is to be human. Until recently, science has largely shied away from asking why. "It's not that religion is not important," says Paul Bloom, a psychologist at Yale University, "it's that the taboo nature of the topic has meant there has been little progress."...
Read it all, very interesting. We are born believers? |
   
Universal Logos
| | Posted on Saturday, February 07, 2009 - 02:23 pm: | |
Universe thinking itself as the Logos? Is Habeas Mentem's "interrelationship" the same as the ancient Heraclitean "Logos"?
The weeping philosopher, Heraclitus Logos need not be the "word of God" in the modern Judeo-Christian sense, nor does it mean necessarily "divine animating principle" of the Stoic philosophers; it fits better as a modern western philosophical idea first proposed by Heraclitus, "as meaning both the source and fundamental order of the cosmos." Take another look at "What is the form of interrelationship", Ch.3, and you will see that any totality of interrelationship forms a definition for its internal parts in terms of the totality image, so nothing can be defined as a "fundamental source and order" other than its place in time within that totality interrelationship image, that which defines its particular things within it. (This is better explained in Ch. 2, "Let us created an idea" of Habeas Mentem.) So if an idea such as interrelationship can from its totality image define, or "think" itself, then it becomes the "Logos" as sought after through the ages. What was missing was an ancients understanding that philosophically the Logos was not in our reason alone, nor some mystical universal principle, but already existed independently of us as a universal principle of "interrelationship": a self sustained mechanism that we in time were able to identify in our minds as the Logos, the source and fundamental order of the universe, and all in it. Taking the Logos out of the pantheism of religions and placing it back in the fundamental principles of the universe, "one true belief system based upon real evidential proofs" that are verifiable, is what the basic concept of Interrelationship does. That it is then also an "animating principle" of all life, or the Totality that is the "word of God" follows naturally, of course. Does that make sense? |
   
Woo-woo universe
| | Posted on Wednesday, February 18, 2009 - 01:16 pm: | |
More Woo-woo Universe Big Bang stuff.
New Model of the Early Universe (Space.com -interactive)
quote:New computer simulations reveal how the early universe would have appeared 500 million years after the theoretical Big Bang. According to the standard Big Bang model, the universe was born about 13.7 billion years ago in a burst of inflation, growing from something smaller than the size of an electron to about golf-ball size within a fraction of a second. In its early stages, the universe was flooded with energy, which congealed into particles and the lighter atoms. Over time, as the cosmos continued to expand on a vastly greater scale, these atoms clumped together into stars and galaxies.
Helloo? Dr. Who? Are we there yet? |
   
non-expanding U
| | Posted on Thursday, February 19, 2009 - 06:30 pm: | |
Totally different take, on a non-expanding Universe can be found here, at Mining Deep Space Gravity: http://www.humancafe.com/discus/messages/88/185.html#POST3594 No woo-woo here? |
   
Plasma axial jets
| | Posted on Monday, February 23, 2009 - 12:27 pm: | |
Follow up on Matsumoto simulation where axial jets were recreated with rotating plasma, 2000
(interactive) Single jet recreated in a lab, 2005
quote:Operating in a vacuum chamber, Bellan's group was able to make jets up to a third of a metre long that travelled at between 10 and 50 kilometres per second. Bigger jets would require a bigger power supply.
A different approach was used here, 2009, to recreate plasma 'burping' astrophysical jets: quote:Jets of charged particles have been created in successive bursts for the first time in the laboratory. The work could shed light on the behaviour of astrophysical jets from stars and galaxies. Astrophysical jets are among the largest and most energetic objects in the universe. The matter inside them travels at nearly the speed of light from colossal black holes at the centres of galaxies. Smaller jets spew at lower speeds from young stars surrounded by discs of gas and dust.
However, we are still a very long way from understanding galactic black hole axial jets, or how this newly released plasma energy can be used in the future, such as suggested by applying the Axiomatic Equation (SMBH): Any hot rotating plasma, or star energy, will result in a vortex center where all electromagnetic energy lambda cancels on a point, which per Axiomatic, is where this canceled electromagnetic hot energy will re-release primordial extreme gravity, where G=c, such as witnessed in a black hole. The above article does not make it clear these plasma jets are from the same phenomenon first simulated by Matsumoto, however, so they may not be same genre. If this is a modifiable event that can be re-created artificially, then it may be a usable future source of energy, or in effect, "gravity in a bottle" type energy. Stay tuned for further research, especially in plasma physics. No woo-woo here either?  |
   
Spacetime spin?
| | Posted on Tuesday, February 24, 2009 - 12:03 pm: | |
Gravity Probe B (GP-B) Relativity Mission - latest update, maybe last.
(interactive) Science Results -- NASA Final Report (image: Spacetime warped and twisted by the mass and spin of the earth)
quote:Abstract This is the first of five connected papers giving details of progress on the Gravity Probe B (GP-B) Relativity Mission. GP-B, launched on 20 April 2004, is a landmark physics experiment in space to test two fundamental predictions of Einstein’s theory of general relativity, the geodetic and frame-dragging effects, by means of ultra-precise cryogenic gyroscopes in Earth orbit. Data collection began 28 August 2004 and science operations were completed 29 September 2005. The data analysis has proven deeper than expected. Patch effect anomalies on the gyro rotor and housing have given rise to two mutually reinforcing complications: 1) A changing polhode path affecting the calibration of the gyroscope scale factor Cg against the aberration of starlight 2) Two larger than expected manifestations of a Newtonian gyro torque due to patch potentials on the rotor and housing. In earlier papers, we reported two distinct methods, ‘geometric’ and ‘algebraic’, for identifying and removing the first Newtonian effect (‘misalignment torque’) and also a preliminary method of treating the second (‘roll-polhode resonance torque’). Central to the progress in both torque modeling and Cg determination has been an extended effort from January 2007 on “Trapped Flux Mapping”. A new turning point came in August 2008 when it became possible to include a detailed history of the roll- polhode resonance torques into the computation. The frame-dragging effect is now plainly visible in the processed data. The current statistical uncertainty from an analysis of 154 days of data by the algebraic method is 6 marcsec/yr (~15% of the frame-dragging effect). The systematic error will be added to this statistical uncertainty using the methods discussed in an accompanying paper by Muhlfelder et al. A covariance analysis, incorporating the impact of patch effect anomalies, indicates that a 3 to 5% determination of frame-dragging is possible with a more complete, but computationally intensive data analysis approach.
Did they find what they were looking for? Was Einstein right (again)? The report seems to indicate the 'frame-dragging' was visible but still inconclusive, so an additional layer of measurement parameters need to be explored and analyzed.
quote:6 Conclusion A “simple” strategy of the GP-B data analysis has evolved in the complex two-floor structure after on- orbit discoveries of the changes in the rotor’s polhode period and path, and of patch effect torques. Direct modeling of the readout scale factor at the 1st Floor, and the misalignment and roll-resonance torque modeling at the 2nd Floor, allowed us to separate the relativistic drift from the drift induced by classical torques. A cascade of four interconnected estimators applied to the GP-B science data has demonstrated a consistent determination of the geodetic and frame-dragging effects for all GP-B gyroscopes, as well as fidelity of the physical models used.
Time to put it to bed... Relativistic drift may be no more than classical momentum transfer, same as Mercury's precession? |
   
space time question/BAUT
| | Posted on Thursday, February 26, 2009 - 01:49 pm: | |
Some questions of space-time expansion discussed at BAUT ATM thread. Not part of discussion, just posted for your info. Modern Cosmology: Science or Folktale? http://www.bautforum.com/against-mainstream/85219-modern-cosmology-science-folkt ale.html Read it all, and add your comment to question. ____________________________________________________________________________ Editor's note: the above questions were posed on Humancafe in the Modern Universe in G-flat pages, Sept. 1, 2007, same referenced article; above is post on universal Logos as interrelationship.) - FYI
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Whose time 2?
| | Posted on Wednesday, March 04, 2009 - 12:08 pm: | |
quote:Who's Time are we talking about?
This was asked on the "Who's time" entry (that thread closed due to spam attacks). But Whose Time are we really talking about? Obviously it is Einstein's Relativity, which has been such an alluringly paradoxical idea that we cannot stop talking about it. Is it really true for more than the observer?
(Wiki-interactive) Time-dilation equation This is all it is, just a time-dilation equation, as seen by the observer. So if t or t', it is all up to the observer whose measurement of light c based observations will be modified by time-dilation 'proper time'. From whose point of view is all. Move along... nothing to see here... just time-dilations  |
   
Mars 2
| | Posted on Friday, March 06, 2009 - 12:12 pm: | |
Mars Opportunity rover update. This is a follow-up to Mars density post earlier, Feb. 4, 2009, where Mars Rover Opportunity had descended into Victoria Crater (see photo), where it had spent over a year exploring. Since then this hardy little robot rover has climbed out by retracing its tracks, and about to engage Endeavour Crater, some 12 km away.
(interactive) NASA's Mars Exploration Rover Opportunity climbed out of Victoria Crater following the tracks it had made when it descended into the 800-meter-diameter (half-mile-diameter) bowl nearly a year earlier. Credit: NASA/JPL-Caltech This journey to Endeavour Crater, traveling about 100 meters per day, could take two years: quote:The Endeavour crater, a bowl 13.7 miles (22 km) across, should offer the chance to study a much deeper stack of rock layers than those Opportunity saw in Victoria Crater. "I would love to see that view from the rim," Squyres said. "But even if we never get there, as we move southward we expect to be getting to younger and younger layers of rock on the surface. Also, there are large craters to the south that we think are sources of cobbles that we want to examine out on the plain. Some of the cobbles are samples of layers deeper than Opportunity will ever see, and we expect to find more cobbles as we head toward the south."
Let's hope this trusty little robot with a troubling forward wheel will make its hazardous journey intact. |
   
GR modified?
| | Posted on Monday, March 09, 2009 - 01:11 pm: | |
A couple of good GR papers, FYI General Theory of Relativity: Will it survive the next decade? (2006) Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the universe (2003) Are we about to see Einstein's GR modified or unseated as the basis for our understanding of cosmology and astrophysics? Read it all. |
   
Modified gravity?
| | Posted on Monday, March 16, 2009 - 12:13 pm: | |
Modified Gravity? Maybe 'variable G' too?
(BBC - interactive) 1. Goce senses tiny variations in the pull of gravity over Earth 2. The data is used to construct an idealised surface, or geoid 3. It traces gravity of equal 'potential'; balls won't roll on its 'slopes' 4. It is the shape the oceans would take without winds and currents 5. So, comparing sea level and geoid data reveals ocean behaviour 6. Gravity changes can betray magma movements under volcanoes 7. A precise geoid underpins a universal height system for the world 8. Gravity data can also reveal how much mass is lost by ice sheets There is an exotic re-interpretation taking place in the mysterious world of infinite scale gravity, though not as simple as to say a variable gravity G is simply an electro-magnetically modifiable force with distance from a hot star. But it, like MOND, is a start. http://arxiv.org/abs/0812.2244 Observational Evidence for Cosmological-Scale Extra Dimensions
quote:We present a case that current observations may already indicate new gravitational physics on cosmological scales. The excess of power seen in the Lyman-alpha forest and small-scale CMB experiments, the anomalously large bulk flows seen both in peculiar velocity surveys and in kinetic SZ, and the higher ISW cross-correlation all indicate that structure may be more evolved than expected from LCDM. We argue that these observations find a natural explanation in models with infinite-volume (or, at least, cosmological-size) extra dimensions, where the graviton is a resonance with a tiny width. The longitudinal mode of the graviton mediates an extra scalar force which speeds up structure formation at late times, thereby accounting for the above anomalies. The required graviton Compton wavelength is relatively small compared to the present Hubble radius, of order 300-600 Mpc. Moreover, with certain assumptions about the behavior of the longitudinal mode on super-Hubble scales, our modified gravity framework can also alleviate the tension with the low quadrupole and the peculiar vanishing of the CMB correlation function on large angular scales, seen both in COBE and WMAP. This relies on a novel mechanism that cancels a late-time ISW contribution against the primordial Sachs-Wolfe amplitude.
The full NewScientist article dealing with the above physics paper can be found at: Gravity may venture where matter fears to tread Another on 'dark matter' is on Space.com: Galaxies Protected by Dark Matter It gets odder yet: Telescope Captures Grouping of Oddball Galaxy and Supernova Another 'variable gravity' potentials? Experimental Tests of General Relativity: Recent Progress and Future Directions, by Slava G. Turyshev , Jan.18, 2009.
quote:Considering gravitation and fundamental physics, our solar system is the laboratory that offers many opportunities to improve the tests of relativistic gravity. A carefully designed gravitational experiment has the advantage to conduct tests in a controlled and well-understood environment and can achieve accuracies superior to its ground- based counterpart. Existing technologies allow one to take advantage of the unique environments found only in space, including variable gravity potentials, large distances,...
Read it all. |
   
Life on Mars
| | Posted on Friday, March 20, 2009 - 12:53 pm: | |
Not if, but when, Life is found on Mars. If these three articles are correct, then subsurface mud pools will harbor microbial life on Mars. Here is the lineup: 1. Is life bubbling up in Mars mud? (NewScientist) If this is correct, then the warm water mud pools may be the base for bacterial life. 2. Scientists find new bacteria species (CNN) If so, then ultraviolet light resistant bacteria high in Earth's atmosphere may be distant cousins of Martian bacteria. 3. Life's Crystal Code (Space) If this is true, then we are made of 'clay' after all, and Life is universal wherever it can find a foothold. Mars now offers very good odds that there is life in our neighborhood.
Quartz crystals that grew out of mineral-rich solutions in large rock cavities Think of 'interrelationship' as the basic building blocks of Life... and Mind. |
   
Ivan/simple
| | Posted on Sunday, March 22, 2009 - 12:02 pm: | |
The Universe is Simple, et al.
(interactive) Universum - C. Flammarion, Woodcut, Paris 1888 Welcome to Humancafe forums! An anthology of thinkers who brought together a vast pantheon of ideas into logical simplicity. Watch this space for future paper on the absolute economy of the Universe, which is simplicity itself, so even I understand it. Ivan |
   
RELATIVITY+ book
| | Posted on Friday, March 27, 2009 - 12:45 pm: | |
RELATIVITY+ by John Duffield - now available at Amazon.com
(interactive) Visit this page for details on book This is a followup of an earlier post, October 11, 2008, on the forum. Very fine book review. |
   
Sum, ergo sum
| | Posted on Thursday, April 02, 2009 - 12:59 am: | |
"Cogito, ergo sum." "I think, therefore I am," is Rene' Descartes. In neo-Descartes "I Am, therefore I am." "Sum, ergo sum."
Is this the post-Cartesian world of the universe according to the Universe is Simple? ___________________________________________________________________________
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The Hand
| | Posted on Saturday, April 04, 2009 - 11:24 am: | |
Here's a postcard from space "The Hand" - NASA's Chandra X-ray Observatory
(interactive) Red represents low-energy X-rays, the medium range is green, and the most energetic ones are colored blue. The blue hand-like structure was created by energy emanating from the nebula around they dying star PSR B1509-58. The red areas are from a neighboring gas cloud called RCW 89. Credit: NASA/CXC/SAO/P.Slane, et al.
quote:Tiny and dying but still-powerful stars called pulsars spin like crazy and light up their surroundings, often with ghostly glows. So it is with PSR B1509-58, which long ago collapsed into a sphere just 12 miles in diameter after running out of fuel. ... The star now spins around at the dizzying pace of seven times every second -- as pulsars do -- spewing energy into space that creates the scene...
How does a twelve mile diameter star spinning seven rotations per second hold together? Extreme G, of course.  |
   
The Eye
| | Posted on Sunday, April 05, 2009 - 01:19 pm: | |
THE EYE
Beauty is in the eye of the beholder. |
   
infrared galaxy
| | Posted on Wednesday, April 08, 2009 - 12:54 pm: | |
Expanding-space-contraction of galaxies? This is a follow up on an earlier post on expanding space by Aladim and successive posts on how the universe is expanding, though with colliding galaxies it is also 'contracting'. Now comes this 'postcard' from space: Nearby Galaxy Looks Bigger in Infrared -Space.com
The Spitzer Space Telescope image of M33. Stars are blue, and in the image several are actually foreground stars in our own galaxy. Dust rich in organic molecules glows green. Diffuse orange-red glowing areas indicate regions where stars are forming. Small red flecks outside the spiral disk of M33 are most likely distant background galaxies, astronomers figure. NASA/JPL-Caltech/Univ. of Ariz.
quote:A new infrared image from NASA's Spitzer Space Telescope reveals the colorful M33 to be surprising large -- bigger than its visible-light appearance would suggest, astronomers said in a recent statement. With its ability to detect cold, dark dust, Spitzer sees emission from cooler material well beyond the visible range of M33's disk. Exactly how this cold material moved outward from the galaxy is still a mystery, but winds from giant stars or supernovas may be responsible, Spitzer astronomers said.
What is intriguing is that the cold dark dust surrounding this M33 galaxy is in fact 'visible' in the infrared band. Could this be the Cold Dark Matter sought after, only cold dust in higher G per Axiomatic Equation? If so, there is no space expansion, and galaxies are free to collide gravitationally as expected.
quote:M33, the third largest galaxy in our group, is also moving toward the Milky Way (which is about 100,000 light-years in diameter). Nothing to worry about, however. This galactic cousin is presently some 2.9 million light-years away in the constellation Triangulum.
Not to worry, a light-year is 10 trillion kilometers, so it may take a while. |
   
Cosmo-constant, which one?
| | Posted on Friday, April 10, 2009 - 11:04 am: | |
The Cosmological Constant in an 'Expanding' Universe. where 'empty' space itself is filled with this vacuum energy. "The cyclic universe model is a simple mechanism for solving the cosmological constant problem" - 19 Sep, 2006
quote:The cosmological constant is a surname for what we call vacuum energy, the energy of empty space. What we mean by empty is without particle, radiation, or any object. There can still be energy, there can still be fields, like electric or magnetic fields, in it but all particles or objects are missing from it.
Even though it’s empty, there can still be energy, and that’s what we call the cosmological constant. Based on the observation, what have we learned about this cosmological constant? The cosmological constant, because the value is so small, because it doesn’t change with time, has almost no observable consequences, except for one thing: it affects the expansion of the Universe. If the vacuum energy is greater than all the other forms of energy, like the energy of the matter or radiation, then it causes the expansion of the Universe to speed up. This effect has been observed. When we look at the motion of distant galaxies compared to more nearby galaxies, we can observe that the expansion of the Universe has been speeding up the last 4 or 5 billion years. That’s the sign that there is a small and positive vacuum energy. ....
This above is how the universe is understood today. Contrast it with the Simple Universe idea here: http://www.humancafe.com/discus/messages/1177/1872.html - March 26, 2009
quote:Energy in modern physics is always Energy [6], which means E=E in all its forms, such as kinetic energy, work energy, heat energy, or electromagnetic energy. This Energy equivalence also applies to the famous de Broglie E=hf equation, where Energy equals Planck's constant times electromagnetic frequency, the basis of Quantum physics. However, where all mechanical and electromagnetic energy may be interchangeable, gravity stands out as something different. Gravity may have more to do with inertial mass than electromagnetic energy [7], and in fact may prove to be inversely proportional. In effect, where today's Cosmology is based on Gravity as a universal constant, taken from Newton's gravitational constant G, and enhanced relativistically with Einstein's General Relativity mathematics; this universal constant may not be as now postulated, but is likely a variable constant, a constant on a curve [8]. This means some universal constants, which are measured and true in our region of space, may be variable elsewhere; in particular gravity's Newton G, which may be “constant” on a curve [9] with distance from our Sun or any hot star. Per force, this means the interaction within Quantum theory's E=hf and gravity theory [10] become paradoxical because they are both constants and variables. What this means in the end is that gravity is not a "universal constant" as now believed, but dependent inversely upon the Energy density where G is measured, so the universe may be "isotropic and homogenous" at gravity levels far greater than now assumed [11]....
Is there a Dark Energy pushing all the galaxies apart? Or is there a gravitational redshift in deep space causing all distant light to appear as if it were Doppler-space-expanding? Which is it?
Universe is this 'simple'? How will history remember this? How close are we to learning the truth? |
   
Galileo's legacy
| | Posted on Sunday, April 12, 2009 - 12:10 pm: | |
Galileo's Legacy, 400th anniversary
(interactive- NewScientist) Galileo's Telescope (1610)
quote:WITH all the attention on Darwin this year, one could almost overlook the 400th anniversary of one of the most significant events in the history of science: the first time Galileo peered through his telescope and provided conclusive evidence that the Earth circles the sun. Two exhibitions are marking the occasion, though, both in conjunction with the Institute and Museum of the History of Science (IMSS) in Florence, Italy. ... The impressive section on Islamic cosmology includes a small, stunning 15th-century spherical astrolabe - the only known example of its kind. From there we see the Christianisation of astronomy: the addition of more complex epicycles to the Ptolemaic system in order to maintain Earth's centrality and regular, circular movements of the heavens. ... Galileo famously came into conflict with the Church: his Dialogo was placed on the Vatican's Index of Prohibited Books and he was called before the Inquisition and forced to abjure his views - a scene depicted in Cristiano Banti's 1857 painting Galileo Before the Inquisition. Whether Galileo ever uttered the apocryphal E pur si muove ("And yet it moves"), he was, of course, proved right. The power of his observations in supplanting religious ideology is best captured in a single arresting image: Galileo's finger, detached from his remains in 1737, encased in glass and gilt and pointing heavenward. It is a scientific reliquary for a secular saint.
Four centuries later, Galileo continues to impress, proven right again for our age of religious ideology conflicts and reconciliations; or secular resolutions. Read it all. |
   
More Galileo's
| | Posted on Friday, April 17, 2009 - 12:15 pm: | |
More on Galileo's legacy postcard, go tell it on the mountain. One of the most famous 'Wacky Ideas'..? - by Seth Shostak
quote: But even an unrefereed publication – indeed even that icon of immodesty, a self-published book – will buff your idea to a better gloss. Consider: When Galileo made his telescopic discoveries of the moons of Jupiter and a few other important things, he felt the need to get them typeset and bound ASAP (he was worried about being scooped by competitors). Rather than wait around 285 years for the Astrophysical Journal, Galileo rushed into print with his own, small book. Smooth move. ... Data are valuable. Ideas, on the other hand – like phone calls and e-mail – are cheap. Your creative genius may have hatched a truly revolutionary idea. Indeed, you probably think so. But no matter what your opinion of your hypothesis might be, if you hope for someone to fly you to Stockholm and hand you a check, don't just call me up and lay out your case. Do something better: write it up and tell the world.
SETI call Home - interactive Or just write it up, kick up your heels, and sit back. Who cares?  |
   
New gravity physics?
| | Posted on Monday, April 20, 2009 - 12:21 pm: | |
New gravity physics called? http://arxiv.org/pdf/0809.3730v2 Experimental Tests of General Relativity: Recent Progress and Future Directions
quote:Given the magnitude of this problem, a number of authors have considered the possibility that cosmic acceleration is not due to a particular substance, but rather that it arises from new gravitational physics (see discussion in [112, 113, 114]). In particular, certain extensions to general relativity in a low energy regime [114, 115, 116] were shown to predict an experimentally consistent universe evolution without the need for dark energy [117]. These dynamical models are expected to explain the observed acceleration of the universe without dark energy, but may produce measurable gravitational effects on the scales of the solar system.
- pg 13 Getting there, metric millimeter by tensor metric? _______________________________________________________________ Cosmo-constant reexamined?
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SEP violation
| | Posted on Tuesday, April 21, 2009 - 11:26 am: | |
RE http://arxiv.org/pdf/0809.3730v2 I think the mistake in Turyshev's paper is here, pg. 18: [mG/mI]SEP = 1 + n(E/mc2) where E is gravitational self-energy, mc2 is total mass-energy, and n is a dimensionless (variable?) constant for SEP violation. The answer will always be =1, regardless if E and G are directly or inversely proportional. This is a null result equation. ___________________________________________________________________________________ Editor's note: The reason behind "This is a null result equation" in the above is most simply explained, per email exchanges, as follows: On the right side (E/mc2), there is a modifier kg'/kg which corresponds with E and G as either fixed or variables; this modifier may then be expressed as n on the right side, I.e., (E/mc2) kg'/kg, will reflect either:
1) E and G are fixed, so m is fixed within the parameters of the equation, so E and m are not affected by G, and kg'/kg remains constant = 1, or 2) E and G are variables, so m per equivalence is G proportional to some variable value of E, so in kg'/kg there is an inverse relation, whereby: 3) If kg' is greater due to greater G, which would happen per Axiomatic in lower E, then the kg'/kg value is greater in proportion to kg, but where the G-local-units of kg' is < than m in kg. 4. E/mc2 must always equal to =1, by definition. For example, on Mars where G is about 1.5 times that of Earth's, hypothetically per Axiomatic, then its kg' locally is higher than Earth's kg, which means it would take fewer kg' on Mars to equal one kg on Earth (not yet clear by how much, until empirically tested), so lower E and higher G would balance out on the right side of above equation with kg'/kg adjusted. The end result is null, so mG/mI remains =1 in all cases, where n=kg'/kg. (Note: Nordvedt's equation (1968) in Equivalence Principle for Massive Bodies, II is predicated on the assumptions that mg/mi=1.) The only way to adequately prove a variable G, given that the above equation will yield null results of =1, is to check for local densities of known chemical compositions. If we know the density of water on Mars, based on local gravity (which is known), we can then calculate based on this density the local G-units (which are unknown) by the relative variable density of water on Earth (which is known). This would apply to any other substance, including water ice, or gases, including the atmosphere; as also found in Martian 'clumpy' soil. See Anisotropy of kg/kg mass, posted Mar. 2, 2008, on "The Modern Universe in G -flat" thread, for further explanation and linked references. SEP violation, or violation of Strong Equivalence Principle, per Einstein's, is best reflected in local chemical densities, thermal ice and vapor densities, and atmospheric densities, per the above. -- Eds.
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Nordvedt's eq.
| | Posted on Saturday, April 25, 2009 - 10:11 am: | |
At first glance, I can't say Nordvedt's equation (1968) makes sense to me, as used by Turyshev, because it seems to assume G is a universal constant; so the [mG/mI]SEP side of the equation assumes gravity G constant and Inertial mass variable. That makes no sense, since they are always proportional, so =1 per Einstein's proof. If G is a variable, there is only one way i can imagine, just intuitive gut feeling, how the equation should read: n[mG/mI]SEP = (E/mc2)kg'/kg where 1+ drops out (redundant) and n as a representation of kg'/kg moves to the left. Does this really mean anything? Only if we find G is variable, IMHO. Thanks.
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In the dark about dark energy
| | Posted on Monday, April 27, 2009 - 12:36 pm: | |
And the fantastic theories continue... We are so in the dark about 'dark energy' that it borderlines absurd.
quote:As if the discovery of dark energy weren't bizarre enough, it has stirred up a whole host other issues. For example, dark energy adds fuel to the fire of believers in multiple universes, or the idea that our own existence is just one of countless worlds in which the constants and conditions are different. There might be other universes in which dark energy doesn't exist, and the universe does slow in its expansion, cosmologists say.
Heavy local concentrations of 'invisible' gases followed by more distant concentrations yield different gravitational redshifted densities of space dust and gas (very high G), which leads to an 'accelerating' space-expansion [sic], as now believed. Any dissenters, or are all lulled by the same fantastic story? What is Dark Energy?
(interactive) Impact Lab - Dark Energy site _____________________________________________________________________________________ Addendum: And it gets bigger yet... Space Explosion Is Farthest Thing Ever Seen By SPACE.com Staff
quote:A stellar explosion has smashed the record for most distant object in the known universe. The gamma-ray burst came from about 13 billion light-years away, and represents a relic from when the universe was just 630 million years old. ... Astronomers in the U.S. and UK quickly scrambled to follow up on the stunning discovery. They found that the infrared light of the afterglow had the highest redshift ever measured, meaning that the wavelengths had been very stretched out during their long journey. ... Swift's new find may indicate an active early universe, even as scientists still try to understand what existed so close to the start of it all. "We now have the first direct proof that the young universe was teeming with exploding stars and newly-born black holes only a few hundred million years after the Big Bang," Berger said. ...
How big is the universe? The next deep redshift coming above z~9 will let the cosmic cat out of the bag. It's much much bigger than 13.7 billion light years 'old'... How big is 'infinity'? --Eds. |
   
'She's too beautiful'
| | Posted on Wednesday, May 20, 2009 - 12:41 am: | |
She's so beautiful, a post card from space. Earth seen from space is a beautiful thing.
(interactive -Space.com article) Sinai Peninsula and the Mediterranean Sea. The Red Sea is just out of frame at bottom right. We humans are blessed. Let's not turn a blessing into a curse. Ivan |
   
UFO or 'Klingons'?
| | Posted on Saturday, October 03, 2009 - 12:19 pm: | |
UFO - or Kllingon vessel? See the video, weird sound with it.
(interactive -video) Picture of strange orbiting object taken from space It doesn't looks like space junk, has three clear lights on one end, maybe windows on the other, so what was it? I had seen strange UFOs in the past, but this one really is weird. Who is 'watching' our beautiful planet? Are they friendly? (click image for more details in 5 min video) Just visiting? See more UFOs on this page at PostScripts. More Planetary Society news and blog. |
   
Shuttle image from space
| | Posted on Wednesday, February 17, 2010 - 01:17 pm: | |
Nope, not Klingons - just our Space Shuttle.
(interactive) Stunning Space Photo Shows Shuttle in Silhouette - Space.com This one's ours  |
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