'via Blog this' The Honourable Schoolboy
The American model of higher education is spreading. It is good at producing excellence, but needs to get better at providing access to decent education at a reasonable cost, says Emma Duncan
terça-feira, 31 de março de 2015
segunda-feira, 30 de março de 2015
domingo, 29 de março de 2015
sábado, 28 de março de 2015
Finland schools: Subjects scrapped and replaced with 'topics' as country reforms its education system - Europe - World - The Independent
Finland schools: Subjects scrapped and replaced with 'topics' as country reforms its education system - Europe - World - The Independent: "With Finland radically reforming the way its children are taught, Richard Garner visits Helsinki to find out if the teachers approve"
'via Blog this' The Honourable Schoolboy
'via Blog this' The Honourable Schoolboy
It was America's bloodiest war, and now, it's in color. Watch Blood and Glory: The Civil War in Color on April 7th.
The Honourable Schoolboy
It was America's bloodiest war, and now, it's in color. Watch Blood and Glory: The Civil War in Color on April 7th.
History Channel
It was America's bloodiest war, and now, it's in color. Watch Blood and Glory: The Civil War in Color on April 7th.
History Channel
sexta-feira, 27 de março de 2015
APOD: 2015 March 26 - Orion Spring
APOD: 2015 March 26 - Orion Spring: "As spring comes to planet Earth's northern hemisphere, familiar winter constellation Orion sets in early evening skies and budding trees frame the Hunter's stars. The yellowish hue of cool red supergiant Alpha Orionis, the great star Betelgeuse, mingles with the branches at the top of this colorful skyscape. Orion's alpha star is joined on the far right by Alpha Tauri. Also known as Aldebaran and also a giant star cooler than the Sun, it shines with a yellow light at the head of Taurus, the Bull. Contrasting blue supergiant Rigel, Beta Orionis, is Orion's other dominant star though, and marks the Hunter's foot below center. Of course, the sword of Orion hangs from the Hunter's three blue belt stars near picture center, but the middle star in the sword is not a star at all. A slightly fuzzy pinkish glow hints at its true nature, a nearby stellar nursery visible to the unaided eye known as the Orion Nebula."
'via Blog this' The Honourable Schoolboy
'via Blog this' The Honourable Schoolboy
quinta-feira, 26 de março de 2015
University protests around the world: a fight against commercialisation | Higher Education Network | The Guardian
University protests around the world: a fight against commercialisation | Higher Education Network | The Guardian: "University protests around the world: a fight against commercialisation"
'via Blog this' The Honourable Schoolboy
'via Blog this' The Honourable Schoolboy
Education has never mattered more, so why won't we invest properly? | Higher Education Network | The Guardian
Education has never mattered more, so why won't we invest properly? | Higher Education Network | The Guardian: "Education has never mattered more, so why won't the UK invest in it properly?"
'via Blog this' The Honourable Schoolboy
'via Blog this' The Honourable Schoolboy
APOD: 2015 March 25 - Naked Eye Nova Sagittarii 2015 No 2
APOD: 2015 March 25 - Naked Eye Nova Sagittarii 2015 No 2: "four days ago from Ranikhet in the Indian Himalayas. "
'via Blog this' The Honourable Schoolboy
'via Blog this' The Honourable Schoolboy
terça-feira, 24 de março de 2015
IMPLICAÇÕES METEOROLÓGICAS DO ECLIPSE SOLAR DE 20 DE MARÇO DE 2015
Instituto Português do Mar e da Atmosfera:
IMPLICAÇÕES METEOROLÓGICAS DO ECLIPSE SOLAR DE 20 DE MARÇO DE 2015
'via Blog this' The Honourable Schoolboy
IMPLICAÇÕES METEOROLÓGICAS DO ECLIPSE SOLAR DE 20 DE MARÇO DE 2015
'via Blog this' The Honourable Schoolboy
segunda-feira, 23 de março de 2015
The Honourable Schoolboy
http://en.wikipedia.org/wiki/Emmy_Noether
Outstanding. Brilliant.
Maths & Physics, viz.
http://en.wikipedia.org/wiki/Emmy_Noether
Outstanding. Brilliant.
Maths & Physics, viz.
Physics[edit]
Noether was brought to Göttingen in 1915 by David Hilbert and Felix Klein, who wanted her expertise in invariant theory to help them in understanding general relativity, a geometrical theory of gravitation developed mainly by Albert Einstein. Hilbert had observed that the conservation of energy seemed to be violated in general relativity, due to the fact that gravitational energy could itself gravitate. Noether provided the resolution of this paradox, and a fundamental tool of modern theoretical physics, with Noether's first theorem, which she proved in 1915, but did not publish until 1918.[102] She not only solved the problem for general relativity, but also determined the conserved quantities for every system of physical laws that possesses some continuous symmetry.
Upon receiving her work, Einstein wrote to Hilbert: "Yesterday I received from Miss Noether a very interesting paper on invariants. I'm impressed that such things can be understood in such a general way. The old guard at Göttingen should take some lessons from Miss Noether! She seems to know her stuff."[103]
For illustration, if a physical system behaves the same, regardless of how it is oriented in space, the physical laws that govern it are rotationally symmetric; from this symmetry, Noether's theorem shows the angular momentum of the system must be conserved.[104]The physical system itself need not be symmetric; a jagged asteroid tumbling in space conserves angular momentum despite its asymmetry. Rather, the symmetry of the physical laws governing the system is responsible for the conservation law. As another example, if a physical experiment has the same outcome at any place and at any time, then its laws are symmetric under continuous translations in space and time; by Noether's theorem, these symmetries account for the conservation laws of linear momentum andenergy within this system, respectively.
Noether's theorem has become a fundamental tool of modern theoretical physics, both because of the insight it gives into conservation laws, and also, as a practical calculation tool.[4] Her theorem allows researchers to determine the conserved quantities from the observed symmetries of a physical system. Conversely, it facilitates the description of a physical system based on classes of hypothetical physical laws. For illustration, suppose that a new physical phenomenon is discovered. Noether's theorem provides a test for theoretical models of the phenomenon: if the theory has a continuous symmetry, then Noether's theorem guarantees that the theory has a conserved quantity, and for the theory to be correct, this conservation must be observable in experiments.
Subscrever:
Mensagens (Atom)