that is, ideas and information on Science and Technology, Archaeology, Arts and Literatures. Physics at http://physics-sparavigna.blogspot.com/
Welcome!
Tuesday, February 14, 2012
Flying pyramids
Saturday, February 4, 2012
Another Earth
Astrónomos europeos hallaron un planeta rocoso, como el nuestro que podría contener agua y vida a 22 años luz de la Tierra, en la constelación de Escorpio.
Friday, January 27, 2012
Aurora boreale
Video da Murmansk, Russia al link
http://www.youtube.com/watch?v=_qWKLobBmPA
Wednesday, January 25, 2012
Joule Unlimited
Joule Unlimited will build a production plant for turning sunlight and CO2 into liquid fuels.
Photosynthesis Fuel Company Gets a Large Investment - Technology Review
Saturday, January 14, 2012
Get physical
"Have you noticed how physical has begun to be more popular as one element in retronyms relating to the online world? If you actually go into a store to buy something, instead of ordering online, that’s physical shopping. Similarly, a physical book is one made with ink on dead trees, in contrast to a digital e-book. Both terms have been around for more than a decade but my impression is that they’ve only recently gone mainstream."
http://www.worldwidewords.org/nl/yurg.htm
Nano 'ears' for nano whispers
Alexander Ohlinger at Ludwig Maximilian University in Munich (LMU), Germany, and colleagues suspended gold nanoparticles in a drop of water. They trapped one sphere in a laser beam and then fired rapid pulses of light from a second laser at others a few micrometres away. The pulses heated the nanoparticles, which disturbed the water around them, generating pressure, or sound, waves."
Gold nano 'ears' set to listen in on cells - health - 13 January 2012 - New Scientist
Saturday, January 7, 2012
The Shelter of Candelo
http://it.wikipedia.org/wiki/Ricetto_di_Candelo
The The name Ricetto comes form the latin word "Receptum" that, in the Middle ages, simply meant "Shelter".
http://www.unricettoinmusica.it/index.php?en/96/ricetto-of-candelo
The Erbil Citadel
http://whc.unesco.org/en/tentativelists/5479/
Friday, January 6, 2012
Megalith Map
http://www.megalithic.co.uk/asb_mapsquare.php
Louisiana's wetlands
http://www.atlantisbolivia.org/canalslouisiana1.htm
Ohm's law at atomic scale
"A new technique for embedding atomic-scale wires within crystals of silicon has revealed that Ohm's law can hold true for wires just four atoms thick and one atom tall. The result comes as a surprise because conventional wisdom suggests that quantum effects should cause large deviations from Ohm's law for such tiny wires. Paradoxically, the researchers hope the finding will aid the development of quantum computers."
Thursday, January 5, 2012
Chimeras
More http://www.guardian.co.uk/science/2012/jan/05/chimera-monkeys-combining-several-embryos
Noah's problems
The tile is: THE NOAH’S ARK PROBLEM, by MARTIN L. WEITZMAN
Abstract: This paper is about the economic theory of biodiversity preservation. A cost-effectiveness methodology is constructed, which results in a particular formula that can be used as a criterion to rank projects. The ranking criterion is sufficiently operational to be useful in suggesting what to look at when determining actual conservation priorities among endangered species. At the same time, the formula is firmly rooted in a mathematically rigorous optimization framework, so that its theoretical underpinnings are clear. The underlying model, called the “Noah‘s Ark Problem,” is intended to be a kind of canonical form that hones down to its analytical essence the problem of best preserving diversity under a limited budget constraint.
Keywords: Biodiversity, endangered species, diversity theory
The author writes
"There are several motivations for this paper. Essentially, I am trying to introduce an analytical framework that represents a useful way of thinking about the economics of diversity through the medium of an abstract mathematical model. The “Noah’s Ark Problem” is a parable intended to be a kind of canonical form of the simplest possible way of representing how best to preserve biodiversity under a limited budget constraint. Throughout the paper, emphasis is laid upon simplicity of structure, in order to get at the analytical essence of
the problem."
Noah's-ark-problem-pdf
Wednesday, January 4, 2012
Aran Islands
Megalithic Ireland
http://www.irishmegaliths.org.uk/iremap.htm
For each county, there is the list of places and images. See for instance:
http://www.irishmegaliths.org.uk/galway.htm