منتديات العلم والمعرفة
شرف لنا تكرمكم لزيارتنا أقسام منتدانا مفتوحه لكم ادخلوها سالمين وان شاء الله ستجدون معنا كل ما تصبوا له روحكم ونحن نتمنى ان تنضموا الينا وتكونوا من افراد اسرتنا جمعنا يكتمل بكم شاركونا افكاركم ومما الله اعطاكم سجلوا ولا تترددوا

منتديات العلم والمعرفة

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تاريخ التسجيل : 01/03/2011

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مُساهمةموضوع: عذرا أصدقاء   عذرا أصدقاء Icon_minitimeالأربعاء مايو 25, 2011 11:16 am

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As hemlines in Korean classrooms rise, so it seems does laser cutting equipment the cost of accommodating them.
Gangwon's Board of Education says it plans to laser cutting system fit boards to the front of 50,000 desks this summer to "help students sit more comfortably laser machine in class".
School rules It is being prompted, at least in part, by the laser cutting machine ever-shorter skirts being worn by female students.
In one survey, quoted in a local paper, school laser cutter hemlines have reportedly risen 10-15cm (4-6in) in the last decade.
And that is apparently making laser cutting everyone uncomfortable.
An official from the Education Board told local media laser cutting machine that the blocking boards also had the support of teachers - who wanted to avoid unnecessary laser cutter misunderstandings.
They do not however have the support of the Teachers' Federation here, which has laser cutting put out a statement condemning the refurbishment as a waste of money.
The matter would be much more easily and cheaply laser engraver resolved, it says, by enforcing the rules on school uniform.

The Crab Nebula has shocked astronomers by laser engraver emitting an unprecedented blast of gamma rays, the highest-energy light in the Universe.
The cause of the 12 April gamma-ray flare, is a laser engraving machine total mystery.
It seems to have come from a small area laser engraving of the famous nebula, which is the wreckage from an exploded star.
The object has long been considered a steady source of light, but laser engraving machine the Fermi telescope hints at greater activity.
The gamma-ray emission lasted for laser engraving some six days, hitting levels 30 times higher than normal and varying at times from hour to hour.
While the sky abounds with light across all parts of the mini laser engraver spectrum,is designed to measure only the most desktop laser engraver energetic light: gamma rays.
These emanate from the Universe's most extreme environments vinyl cutter and violent processes.
The Crab Nebula is composed mainly of vinyl cutter the remnant of a supernova, which was seen on Earth to rip itself apart in the year 1054.
At the heart of the brilliantly coloured gas cloud we can cutting plotter see in visible light, there is a pulsar - a rapidly spinning neutron star that emits radio waves which cutting plotter sweep past the Earth 30 times per second. But so far none of the nebula's known components can explain the signal Fermi sees, said Roger Blandford, director laser tube of the Kavli Institute for Particle Astrophysics desktop cnc router and Cosmology, US.
"The origin of these high-energy gamma rays has mini cnc router to be some other source," he told BBC News.
"It takes about six years for light to cross the nebula, so it must PCB cnc router be a very compact region in comparison to the size of the nebula that's producing these cnc router outbursts on the time scales of hours."
Since its launch nearly three years ago, Fermi has cnc routers spotted three such outbursts, with the at the American Astronomical Society meeting.
These events are unleashing gamma rays with energies cnc wood router of more than 100 million electron-volts - that is, each packet of light, or photon, carries tens of woodworking cnc router millions of times more energy than the light we can see.
But the Crab's recent outburst is more than five times more intense wood cnc router than any yet observed.
What has perplexed astronomers is that these plotter variations in gamma rays are not matched by changes in the emission of other light "colours". Follow-up studies using the Chandra X-ray telescope, for example, showed no large format plotter variations in the X-ray intensity.
Kavli Institute researcher Rolf Buehler outlined the details of the Crab's flashes wide format plotter to the meeting on Thursday.
"If you look in optical light, the Crab is cnc stone router very steady; in radio emission, it's very steady; in very, very high-energy gamma rays it's very steady. Only in this part between do we cnc granite router see it varying," he told BBC News.

"That's why people hadn't found this before; there was not stone cnc router an instrument like Fermi sensitive enough to capture it."
Understanding the flare, however, may granite cnc router take some time, Dr Buehler said.
"To have something that puts almost all of its energy into gamma flash stamp machine rays is an unusual thing," he said. "We're looking at a big puzzle and are probably going to Pre Inked stamp need a couple of years to understand it."
The best guess so far is that in a region near the neutron star, intense self Inking stamp magnetic fields become opposed in direction, suddenly re-organising themselves and accelerating close-by particles to near the speed of light.
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