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Benvenuti in queste pagine dedicate a scienza, storia ed arte. Amelia Carolina Sparavigna, Torino

Sunday, April 17, 2011

Kongo Rikishi


Kongo Rikishi stante su base rocciosa
legno di cipresso giapponese dipinto, altezza cm 230,5
Giappone, periodo Kamakura, seconda metà XIII secolo

Imponente statua realizzata con pezzi assemblati (yosegi-zukuri). Rappresenta uno dei due guardiani del tempio e della dottrina buddhista posti in coppia ai lati della porta dei monasteri. Ha la bocca chiusa e contratta per esprimere l’esplosivo hum, il terribile mantra delle divinità furiose.


Museo Arte Orientale, Torino

Saturday, April 16, 2011

Raised fields and qochas

The "raised fields" are an ancient agricultural technique, based on the used of earthworks and a system of canals and ponds for water. This technique was used in South America, long before Columbus. Near the Titicaca Lake, it is possible to see using the Google Maps, a huge area marked by the remains of this agricultural system. In fact, some local farmers are still using old raised fields.

Are the following structures I found by means of Google Maps, modern or ancient?
Have they a symbolic meaning?

The "sun wheel"
Comparison 2011-2010
Another "sun wheel"
Two circular and radial structures.
The location of these images is the Chicchapampa, Lake Titicaca. 
To see other geoglyphs of Titicaca, use please the label "Geoglyphs".

Friday, April 15, 2011

Moray Inca ruin


Moray, after processing of a Google Maps image

Moray is an archaeological site in Peru approximately 50 km northwest of Cuzco. The site contains unusual Inca ruins, mostly consisting of several enormous terraced circular depressions, the largest of which is about 30 m deep. Wiki reports a very interesting information: the depth and orientation with respect to wind and sun of the depression creates a temperature difference of as much as 15 °C between the top and bottom. According to Wiki "this large temperature difference was possibly used by the Inca to study the effects of different climatic conditions on crops. In other words, Moray was perhaps an Inca agricultural experiment station. As with many other Inca sites, it also has a sophisticated irrigation system."

Andenes as level curves


Andenes as level curves, near Ayacucho, Peru
After processing a Google Maps image.

"Andenes are terraces dug into the slopes of mountains for agricultural purposes. They were constructed and much used in the Andes mountain range to provide cultivable hillsides. The majority of these terraces were constructed and used by the pre-Hispanic cultures, and many can still be observed throughout the region."

Another wheel



A geoglyph near Chicchapampa, Lake Tititcaca, Peru, 

Sun wheel


A geoglyph at Chicchapampa,  Lake Titicaca 
Image adapted from Google Maps.

see also

Thursday, April 14, 2011

Stellar vibrations

"Scientists have long known that the atmosphere of the Sun oscillates. In the same way seismologists use earthquakes to model the interior of the Earth, helioseismologists use vibrations observed on the Sun to probe deeper into our star. Oscillations of about 25 other stars have also been studied in the emerging field of asteroseismology. Now, thanks to the Kepler space telescope, a team led by Bill Chaplin, at the University of Birmingham, UK, has increased this figure significantly."
Kepler picks up stellar vibrations - physicsworld.com

Elusive WIMPS

On the XENON collaboration to find WIMPS
WIMP no-show casts a shadow over dark matter - physicsworld.com

Monday, April 11, 2011

SNEWS

When a red giant star collaps on itself a burst of neutrinos is produced. This occurs before that light is emitted in the explosion, The SuperNova Early Warning System (SNEWS) is a network of neutrino detectors designed to give an early warning to astronomers of a supernova event in the Milky Way. The neutrino pulse from supernova 1987A was detected 3 hours before the photons.
The current members of SNEWS are Borexino, Super-Kamiokande, LVD, SNO and IceCube.
http://en.wikipedia.org/wiki/Supernova_Early_Warning_System

Neutrinos in IceCube

The IceCube Neutrino Observatory (or simply IceCube) is a neutrino telescope constructed at the Amundsen-Scott South Pole Station in Antarctica. Similar to its predecessor, the Antarctic Muon And Neutrino Detector Array (AMANDA), IceCube contains thousands of spherical optical sensors called Digital Optical Modules (DOMs), each with a photomultiplier tube (PMT) and a single board data acquisition computer which sends digital data to the counting house on the surface above the array. More http://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory
"IceCube, which was completed in December 2010, is a kilometer-cubed array of photodetectors that have been drilled down into the Antarctic ice cap... The IceCube team compared 13 months of their data (collected when the array was half finished) to observations of 117 Gamma-Ray Bursts measured independently over the same time period. Contrary to expectations, no high-energy neutrinos were detected within a half-hour of each GRB. Theorists may need to rethink their models of GRBs, as well as look for other possible sources for the highest energy cosmic rays." This is what Michael Schirber writes in
http://physics.aps.org/synopsis-for/10.1103/PhysRevLett.106.141101