Saw my first bear of the year while riding my bike, and although they are common around here, mostly they avoid humans and thus see, hear or smell us long before we see them. This individual had crossed the road about fifty yards in front of me and disappeared down a bank into a wooded ravine. I was climbing slowly up a hill at the time and figured that it had continued on into the woods, but as I approached the spot where it had gone over the edge, it suddenly popped its head up as if it wanted to return back across the road at the same spot, so was no more than 15 feet to my side. I yelled "Hey!" as if it were a dog, which caused it to turn and run back into the ravine, stopping to look at me some 40 or 50 yards further on. No doubt I had startled it more than it had startled me, and fortunately black bears are very rarely aggressive, so as I talked calmly to it it eventually continued leisurely into the woods.
One aspect of bears and other living creatures that always impresses me is the vividness of their color-and I consider black a true color when it is part of a wild animal. It is unlike any other black, being instead a "living" vibrant hue that cannot be duplicated by paint or photograph, and shimmers like an aspen tree in the light. It makes such a contrast with the landscape around it that it appears to be almost separate from, like a crude simulation, yet the animal itself moves fluidly through the woods like a bird through the wind.Sunday, October 18, 2015
Sunday, August 9, 2015
Modern construction
The local Amish had a barn raising last week during which 75 workers constructed a 96 foot long by 60 foot wide barn and an adjoining 40x24 foot room. Total time? Less than 8 hours..."The men started at 7am and by lunch time most of it was done. They expected to be finished by 3pm."
“The first Kinzua Railroad
Bridge was built by a
crew of 40 from 1,552 short tons (1,408 t) of wrought iron in just
94 working days, between May 10 and August 29, 1882. The reason
for the short construction time was that scaffolding was not used in the
bridge's construction; instead a gin pole was used to build the first tower,
then a traveling crane was built atop it and used in building the second tower.
The process was then repeated across all 20 towers.”
Meanwhile in Warren the concrete bridge along the two lane main road is being replaced...(with modern power equipment assistance)...Construction began in early May and is projected to be finished in mid-September...over four months..I guess readers can see my point-there seems to be no will for efficient work.
Saturday, August 8, 2015
Iranian Nukes
~ Despite what the war and fear mongers and other protesters who likely have not even read the Iran nuclear deal say, scientists are the people I prefer to put my trust in regarding such matters. I have read the books and articles of some of the signatories mentioned below and know them to be smart, thoughtful people. It is hard to comprehend the level of ignorance and small mindedness in many of our political leaders, but I suppose that politics in general attracts a certain personality type which does not often include our best minds...The following is from the NY Times:
"Twenty-nine
of the nation’s top scientists — including Nobel laureates, veteran
makers of nuclear arms and former White House science advisers — wrote
to President Obama on Saturday to praise the Iran deal, calling it innovative and stringent.
The letter, from some of the world’s most knowledgeable experts in the fields of nuclear weapons and arms control, arrives as Mr. Obama is lobbying Congress, the American public and the nation’s allies to support the agreement.
The
two-page letter may give the White House arguments a boost after the
blow Mr. Obama suffered on Thursday when Senator Chuck Schumer of New
York, a Democrat and among the most influential Jewish voices in
Congress announced he would oppose the deal, which calls for Iran to curb its nuclear program and allow inspections in return for an end to international oil and financial sanctions.
The
first signature on the letter is from Richard L. Garwin, a physicist
who helped design the world’s first hydrogen bomb and has long advised
Washington on nuclear weapons and arms control. He is among the last living physicists who helped usher in the nuclear age. Also signing is Siegfried S. Hecker, a Stanford professor who, from 1986 to 1997, directed the Los Alamos weapons laboratory...
Other
prominent signatories include Freeman Dyson of Princeton, Sidney Drell
of Stanford and Rush D. Holt, a physicist and former member of Congress
who now leads the American Association for the Advancement of Science,
the world’s largest general scientific society.
Most
of the 29 who signed the letter are physicists, and many of them have
held what the government calls Q clearances — granting access to a
special category of secret information that bears on the design of
nuclear arms and is considered equivalent to the military’s top secret
security clearance.
Many
of them have advised Congress, the White House or federal agencies over
the decades. For instance, Frank von Hippel, a Princeton physicist,
served as assistant director for national security in the White House
Office of Science and Technology Policy during the Clinton
administration.
The
five Nobel laureates who signed are Leon N. Cooper of Brown University;
Sheldon L. Glashow of Boston University; David Gross of the University
of California, Santa Barbara; Burton Richter of Stanford; and Frank
Wilczek of the Massachusetts Institute of Technology.
The
letter uses the words “innovative” and “stringent” more than a
half-dozen times, saying, for instance, that the Iran accord has “more
stringent constraints than any previously negotiated nonproliferation
framework.”
Monday, July 27, 2015
Animal Life...
Wednesday, May 27, 2015
Reality
Physicists at The Australian National University (ANU) have conducted John Wheeler's delayed-choice thought experiment, which involves a moving object that is given the choice to act like a particle or a wave. Wheeler's experiment then asks -- at which point does the object decide?
Common sense says the object is either wave-like or particle-like,
independent of how we measure it. But quantum physics predicts that
whether you observe wave like behavior (interference) or particle
behavior (no interference) depends only on how it is actually measured
at the end of its journey. This is exactly what the ANU team found.
"It proves that measurement is everything. At the quantum level, reality does not exist if you are not looking at it," said Associate Professor Andrew Truscott from the ANU Research School of Physics and Engineering.
Despite the apparent weirdness, the results confirm the validity of quantum theory, which governs the world of the very small, and has enabled the development of many technologies such as LEDs, lasers and computer chips.
The ANU team not only succeeded in building the experiment, which seemed nearly impossible when it was proposed in 1978, but reversed Wheeler's original concept of light beams being bounced by mirrors, and instead used atoms scattered by laser light.
"Quantum physics predictions about interference seem odd enough when applied to light, which seems more like a wave, but to have done the experiment with atoms, which are complicated things that have mass and interact with electric fields and so on, adds to the weirdness," said PhD student Roman Khakimov.
Professor Truscott's team first trapped a collection of helium atoms in a suspended state known as a Bose-Einstein condensate, and then ejected them until there was only a single atom left.
The single atom was then dropped through a pair of counter-propagating laser beams, which formed a grating pattern that acted as crossroads in the same way a solid grating would scatter light.
A second light grating to recombine the paths was randomly added, which led to constructive or destructive interference as if the atom had travelled both paths. When the second light grating was not added, no interference was observed as if the atom chose only one path.
However, the random number determining whether the grating was added was only generated after the atom had passed through the crossroads.
If one chooses to believe that the atom really did take a particular path or paths then one has to accept that a future measurement is affecting the atom's past, said Truscott.
"The atoms did not travel from A to B. It was only when they were measured at the end of the journey that their wave-like or particle-like behavior was brought into existence," he said.<<
"It proves that measurement is everything. At the quantum level, reality does not exist if you are not looking at it," said Associate Professor Andrew Truscott from the ANU Research School of Physics and Engineering.
Despite the apparent weirdness, the results confirm the validity of quantum theory, which governs the world of the very small, and has enabled the development of many technologies such as LEDs, lasers and computer chips.
The ANU team not only succeeded in building the experiment, which seemed nearly impossible when it was proposed in 1978, but reversed Wheeler's original concept of light beams being bounced by mirrors, and instead used atoms scattered by laser light.
"Quantum physics predictions about interference seem odd enough when applied to light, which seems more like a wave, but to have done the experiment with atoms, which are complicated things that have mass and interact with electric fields and so on, adds to the weirdness," said PhD student Roman Khakimov.
Professor Truscott's team first trapped a collection of helium atoms in a suspended state known as a Bose-Einstein condensate, and then ejected them until there was only a single atom left.
The single atom was then dropped through a pair of counter-propagating laser beams, which formed a grating pattern that acted as crossroads in the same way a solid grating would scatter light.
A second light grating to recombine the paths was randomly added, which led to constructive or destructive interference as if the atom had travelled both paths. When the second light grating was not added, no interference was observed as if the atom chose only one path.
However, the random number determining whether the grating was added was only generated after the atom had passed through the crossroads.
If one chooses to believe that the atom really did take a particular path or paths then one has to accept that a future measurement is affecting the atom's past, said Truscott.
"The atoms did not travel from A to B. It was only when they were measured at the end of the journey that their wave-like or particle-like behavior was brought into existence," he said.<<
Saturday, April 18, 2015
Ahh...Spring...?
Finally some sun and warm air, so we have been able to get out on the mountain bikes a few times. Unfortunately, this being Western PA there are snow showers and a high temperature of 45 predicted for the end of next week...POSTSCRIPT: April 23...Snow overnight continues today, accumulating an inch in town and 3 inches in other places...April snows are not uncommon around here and fortunately are short lived. POSTSCRIPT: May 2...Saw the first butterfly yesterday, a Spring Azure blue, and today the first cabbage butterfly and also an American Copper. Two to three weeks later than most years.
Saturday, March 28, 2015
January Revisited
No doubt I beat a dead horse regarding the weather around here, but as a warm weather person I am astounded ( disgusted...)by how crummy it can be. These pics were taken an hour ago about 1/2 mile from downtown Warren at a place called Morrison Run. The creek, which flows through a wooded valley then underneath the railroad tunnel beside the road, empties into the Allegheny river a quarter mile further downstream.The ice ledge in the last photograph is two feet thick and the snow in the woods is about a foot deep. The road itself is solid ice covered by last nights dusting of snowfall, and because this area is shaded by Hemlock trees and the steep terrain, it likely won't fully melt for another three weeks. The dog and I had been unable to access the road for almost two months because of the snow( her legs literally are not long enough), and only the past two weeks of moderate melting have progressed things this far. The snow has melted elsewhere except for plowed piles, thus coming here is like entering a separate micro climate-as if we had risen several thousand feet in elevation. Although I do appreciate the beauty of winter, after four months it grows tedious, and I long to wear short sleeves and ride my mountain bike...
POSTSCRIPT: March 31st- Five more inches of snow so far this morning...Really? I mean..really?
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