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

Friday, July 15, 2011

Desert kites and stone circles

Stone structures in the Syrian Desert - by Amelia Carolina Sparavigna, Dipartimento di Fisica,
Politecnico di Torino, Torino, Italy

Paper published on ARCHAEOGATE http://www.archaeogate.org/
Here I am reporting a part of my paper, with some figures. To read the complete article, visit the link

An arid land, known as the Syrian Desert, is covering a large part of the Middle East, extending from the northern Arabian Peninsula to the eastern Jordan, southern Syria, and western Iraq. In the past, this harsh environment characterized by huge lava fields, the "harraat" [1], was considered as a formidable barrier between Levant and Mesopotamia. This desert possesses two volcanic regions: one is the Jabal al-Druze in As-Suwayda Governorate, the other field is the Harrat Ash Shaam in South Syria, south-east of Damascus [2,3]. When we observe these huge harraat from space, using for instance the Google Maps, we discover that they are crossed by several stone structures, known as "desert kites", which were the Neolithic stone traps for the game. These structures were firstly observed by the pilots of the Royal Air Force in the 1920s, flying over the desert. The pilots named them "kites", because these lines reminded of kites used by children to play [4]. Beside the kites, many stone circles are visible too, as many Stonehenge sites dispersed in the desert landscape. Probably, this harsh environment was friendlier and then quite populated in ancient times.

We usually imagine our ancestors, before they settle down, as people simply hunting and gathering for food, but this is not true. The "desert kites" are the remains of an ancient hunting technique based on stone-walled traps, the construction of which surely involved several people for long times. The desert kites were used to push large herds of animals into some enclosures, or, in the worse case, to fall off from steep cliff edges [4]. The simplest structure of a desert kite has a triangular shape, consisting of two long, low walls built of stones and arranged in a V-shape, like a funnel, ending as a corral. Hunters pushed the game between the walls, trapping then the animals into the end of the structure. It is usually considered that the animals were there slaughtered "en masse" [4-7]. The fauna remains found in these sites are including gazelles, Arabian oryxes and other species that are now rare or driven to extinction in the Levant [4]. A research at the Mesopotamian site of Tell Kuran, found what seems to be a deposit from a mass kill. According to [6], it was the overuse of desert kites a possible cause of extinction of several species.


Fig.1. The wonderful structure of a “desert kite”(Jordan), as it can be observed with Google Maps.



Fig.2: A landscape with desert kites and other stone structures (Jordan). This is an image adapted from the Google Maps. The visibility of marked areas has been adjusted with image processing software.


Fig.3: Desert kites. The images have been adapted from the Google Maps. The visibility of the stone strctures has been adjusted with image processing software.

Typically, a desert kite possesses two, three or more small circular enclosures on the edge of its corral (in Fig.1 a wonderful structure as it can be observed with Google Maps, other examples in Fig.2 and 3). Some ancient rock art images show these hunting traps [8], depicting the role of the 'walls' of the kites. ...
....
As we discussed in the paper on Arabia [11], an interesting fact is necessary to note [8]. In the Khaybar area, Arabia, there are some remains of Neolithic villages very close to the hunting desert kites. Linking the "desert kites" with "human villages" could be a mistake, because wild animals are avoiding places where people live. Since the Khaybar area is full with ancient burial structures, sometimes placed inside the desert kites, a possible conclusion is that these burial mounds are more recent than the desert kites [8]. Because this conclusion is coming from the observation of satellite images, it seems that the satellites, and in particular the Google Maps, can help the archaeological researches providing a portrait of the human collective activities in the early stages of civilization.
Even the Syrian Desert is dispersed with circular stone structures and mounds, sometimes inside or near the desert kites (see Fig.2 for instance). On these earlier human settlements, news was announced last year that Robert Mason, archaeologist of the Royal Ontario Museum, discovered what we can define as a Syrian Stonehenge [12]. The site, near the Deir Mar Musa al-Habashi monastery, is composed by some tombs and stone circles. From the stone tools he found there, it's likely that the structure dates from the Middle East's Neolithic Period, roughly ranging from 8500 BC to 4300 BC. In Western Europe, the first structures built of stone date back approximately to 4500 BC. The Syrian site is then quite older than the European sites. Edward Banning of the University of Toronto says that more fieldwork is necessary because it is possible that the landscape that Robert Mason has identified could be an example, in the Neolithic period, of burial practices out of the settlement, that is, an off-site cemetery [12].
The report in [12] is continuing with a suggestion by Julian Siggers, of the Royal Ontario Museum. Remembering that agriculture spread from the Near East to Europe, he is proposing the possibility that the stone landscapes, that is the creation of stone circles, had travelled with agriculture. On the other hand, Banning is replying that stone structures are found throughout the world and that people in Western Europe could have developed the stone landscapes independently of the people in Middle East. According to Edward Banning, the site studied by Mason is not unique [12,13]. "Archaeologists have detected, via satellite photos, what appear to be cairns and stone circles in other areas, including the deserts of Jordan and Israel. However, he admits that most of these things have not received a lot of archaeological investigation."
....

References
1. In Arabic, the lava fields are the harraat, sing. harrah; before a name, harrat.
2. Jabal al-Druze Volcanic Field in Southern Syria – May 16th, 2010, http://www.eosnap.com/image-of-the-day/jabal-al-druze-volcanic-field-in-southern-syria-may-16th-2010/
3. Global Volcanic Program, Es-Safa, http://www.volcano.si.edu/world/volcano.cfm?vnum=0300-05-
4. Mysterious desert lines were animal traps, Larry O'Hanlon, Apr 20, 2010, http://news.discovery.com/history/desert-lines-hunting-tool-kites.html
5. Desert Kites, Ancient Hunting Technique Desert Kites, K. Kris Hirst, About.com Guide, http://archaeology.about.com/od/dathroughdeterms/qt/Desert-Kites.htm
6. Role of mass-kill hunting strategies in the extirpation of Persian gazelle (Gazella subgutturosa) in the northern Levant, Guy Bar-Oz, Melinda Zeder, Frank Hole, Proceedings of the National Academy of Sciences, Early Edition, May 3, 2011, vol. 108, no. 18, 7345-7350, doi:10.1073/pnas.1017647108,
7. Gazelles caught in ancient Syrian 'killing zones', Jonathan Amos, BBC News, 19 April 2011.
8. Khaybar Desert Kites, Vanja Janežic, alsahra.org/wp-content/uploads/2009/02/khaybar-desert-kites.pdf, see also http://www.megalithic.co.uk/article.php?sid=2146412866
9. The function of "Desert Kites" - Uniting or livestock husbandry? B. Rosen, A. Perevolotsky, Paléorient, Vol.24, Pag. 107-111, 1998.
10. The Desert "Kites" of the Badiyat Esh-Sham and North Arabia, A.V.G. Betts, S. Helms, Paléorient, Vol.13, Pag. 41-67, 1987.
11. Arabia: from craters to stone circles, Amelia Carolina Sparavigna, Archaeogate, 19-11-2010, and also, http://arxiv.org/abs/1011.2111
12. Syria's Stonehenge: Neolithic stone circles, alignments and possible tombs discovered, Owen Jarus, Monday, 1 March 2010, The Independent, http://www.independent.co.uk/life-style/history/syrias-stonehenge-neolithic-stone-circles-alignments-and-possible-tombs-discovered-1914047.html
13. A web-site, 27 March 2011, http://www.stonepages.com, published the news of a 11,000-year-old settlement unearthed in Syria. A Syrian-French archaeological mission unearthed a small village in the archaeological site of Tel Qarasa in the west of Swaida province dating back to around 11,000 years. The search conducted at the site over the last two years allowed the archaeologists to discover a tiny village of 8 round houses whose inhabitants depended on fishing and growing cereal crops and wild fruits for their living. The Syrian-French mission said the excavations have revealed 522 archaeological sites in al-Lajat region from the ancient historical periods of the 7th millennium BCE, among which was Tel Qarasa.
14. More images at https://sites.google.com/site/syriandesertsatelliteimagery/
15. According to Wikipedia, desert kites and stone circles can be considered as Petroforms.

Fig. 4: A stone circle in Syrian Desert. The images have been adapted from the Google Maps.

Fig. 5: Other stone circles in Syrian Desert. The images have been adapted from the Acme Mapper.

Fig. 6: Stone landscape in Syrian Desert. The images have been adapted from the Google Maps. Note the “dots” that are surrounding the circular complexes.

Thursday, July 14, 2011

Abusir - from Pliny the Elder to Google Maps

Abusir: from Pliny the Elder to Google Maps
Amelia Carolina Sparavigna, Dipartimento di Fisica, Politecnico di Torino, Torino, Italy

"Abusir, the House of Osiris, is the name given to an Egyptian necropolis of the Old Kingdom period. This site is a part of a huge area, from Giza to Dahshur, rich of archaeological remains and covered by many pyramids. The paper is reporting concisely some archaeological studies on Abusir. We start from the description given by Pliny the Elder and end proposing the use of Google Maps."

Read more


Map of Abusir
In the upper part of the figure, we see an image from Google Maps, obtained after a suitable image processing, showing the Abusir site. In the lower part, a map from http://en.wikipedia.org/wiki/Abusir, for comparison. 

An acoustic superlens from a few cans of cola

""Acoustic metamaterial" may sound exotic, but researchers in France have managed to assemble one from a few multipacks of cola cans. Arranged in a grid, the drinks cans act as a superlens for sound, focusing acoustic waves into much smaller regions than their metre-long wavelengths typically allow. The cans act as resonators, directing the volume of the sound to peak in a space just a few centimetres wide, and this heightened precision could improve acoustic-actuator systems."
How to make a superlens from a few cans of cola - physicsworld.com

Wearable Sensors for Remote Healthcare

Using Wearable Sensors for Remote Healthcare Monitoring System
A. P. Abidoye, N. A. Azeez, A. O Adesina, K. K Agbele, H. O. Nyongesa
KEYWORDS: Wireless Sensor Networks, Wireless Body Area Networks, ZigBee/IEEE 802.15.4, PDA, 3G, Medical Server
Recent technological advances in wireless communications and wireless sensor networks have enabled the design of low-cost, intelligent, tiny, and lightweight medical sensor nodes that can be strategically placed on human body, create a wireless body area network (WBAN) to monitor various physiological vital signs for a long period of time and providing real-time feedback to the user and medical staff. WBANs promise to revolutionize health monitoring. In this paper, medical sensors were used to collect physiological data from patients and transmit it to Intelligent Personal digital Assistant (IPDA) using ZigBee/IEEE802.15.4 standard and to medical server using 3G communications. We introduced priority scheduling and data compression into the system to increase transmission rate of physiological critical signals which improve the bandwidth utilization. It also extends the life time of hand-held personal server by reducing power consumption during transmission.

On the journal

Journal of Sensor Technology
ISSN Print: 2161-122X
ISSN Online: 2161-1238
Website: http://www.scirp.org/journal/jst

South Sudan, the newest country

"South Sudan, officially known as The Republic of South Sudan, is a country in East Africa. Its capital and largest city is Juba, located in the southern state of Central Equatoria. The landlocked country is bordered by Ethiopia to the east; Kenya to the southeast; Uganda to the south; the Democratic Republic of the Congo to the southwest; the Central African Republic to the west; and the Sudan to the north. South Sudan includes the vast swamp region of the Sudd formed by the White Nile, locally called the Bahr al Jabal."
 http://en.wikipedia.org/wiki/South_Sudan
Newest country and football team  too...
http://edition.cnn.com/2011/SPORT/football/07/14/football.sudan.nation.south/

Caligae

A massive statue believed to be that of  Emperor Caligula, sitting on a throne, coming from an illegal dig south of Rome, was unveiled. The statue, broken in several large pieces, was found last January when Finance Police stopped it from being smuggled out of the country. The  "tomb raiders" tried to sell this archaeological treasure on the black market. The statue has feet wearing "caligae": this is why the person shown by the statue is identified as the emperor Caligula. 


The Emperor Caligula. Statue in the Museo Nazionale, Naples.

Caligula's statue will come back home

"La statua dell’imperatore Caligola torna a Nemi. A recuperarla il comando provinciale della Guardia di Finanza di Roma, guidato dal generale Ignazio Gibilaro, nel corso di una più vasta operazione di tutela del patrimonio artistico nazionale. «E' stato recuperato un pezzo di straordinaria bellezza e rinvenuto un sito archeologico finora sconosciuto alla stessa sovrintendenza – ha spiegato Giuseppina Ghini, direttrice del Museo delle Navi dove sarà collocata la statua dopo il suo restauro - Abbiamo sottoposto la statua ad una prima ripulitura, presto inizieremo il restauro ma per ora si sta ancora studiando, analizzando»."
http://www.newnotizie.it/2011/07/13/ritrovata-la-statua-di-caligola-in-trono/
Emperor Caligula's statue is coming back home to Nemi. It was the provincial team of the Guardia di Finanza in Rome, led by General Ignacio Gibilaro, to retrieve it, during an police action to protect the national artistic heritage. According to Giuseppina Ghini, head of the Museum at Nemi,  this staue is a piece of extraordinary beauty, discovered in a previously unknown archaeological site. The statue, after restoration, will be soon bach home in the Museum of Nemi. 

Tuesday, July 12, 2011

Earliest Roman basilica found outside Alexandria - Ahram Online

" At Al-Baron area in Semouha district, south of Alexandria, an Egyptian archaeological mission has discovered several significant monuments and artefacts that will help in the writing of the history of the area.

 During excavations, archaeologists uncovered the earliest Roman civil basilica yet found on top of a Ptolemaic temple dedicated to the three Alexandria deities (Isis, Serapis, Harpocrates) along with a collection of terracotta statues."
Earliest ever civil Roman basilica found outside Alexandria - Greco-Roman - Heritage - Ahram Online

Monday, July 11, 2011

DNA transistor

"Passivated nanopores withstand extreme voltages.
Solid-state nanopores are a core element of next-generation single molecule tools in the field of nanobiotechnology, most prominently in the area of DNA-sequencing technology. Researchers at the IBM T. J. Watson Research Center have recently introduced a nanopore-based DNA sequencing platform, which they call a DNA transistor. Thin-film electrodes are integrated into the nanopore device for electrically interacting with translocating DNA. They have now shown that TiN electrodes inside a nanopore can be passivated and completely shielded against electrochemical deterioration even when extreme voltages are applied."

electrochemical impedance spectroscopy

"Functionalized electrochemical impedance spectroscopy device targets personalized medicine.
Rapid, sensitive, accurate, miniaturized and inexpensive biosensors are highly desirable for assisting clinical medical diagnosis. Researchers based at National Chiao Tung University, Taiwan, have developed such a portable bio-sensing platform to detect intermolecular interactions using nanogold-enhanced electrochemical impedance spectroscopy (EIS)."

Friday, July 8, 2011

Objeto en llamas sobre Alemania

"Un objeto volador no identificado cayó en llamas sobre la ciudad de Berlín, Alemania. Una cámara captó el momento preciso en el que se observa al extraño objeto cayendo de manera lenta paro totalmente incendiada."

Vídeo: objeto en llamas cae sobre Alemania

Sandstorm on Phoenix

Phoenix Dusts Off After Giant Sandstorm Whips Through
More http://www.nytimes.com/2011/07/07/us/07dust.html

See the video (courtesy: http://www.mikeolbinski.com/ and http://www.krazywake.com/)
Amazing video by two photographers - Mike Olbinski and Blaine Coury - in Arizona.
 A wall of dust is moving on Phoenix in Arizona. 

Tuesday, July 5, 2011

A giant mirage on a Chinese river

'Lost Civilization' Appears Above Chinese River, Published June 27, 2011,  News Corp Australian Papers
"It looks like any other city skyline with skyscrapers, a few mountains and trees -- except it isn't real.
The giant mirage appeared across the skyline in East China earlier this month after heavy rainfall and humid conditions covered the Xin’an River. As mist settled over the river at dusk, tall buildings appeared to rise from nowhere, leading residents in nearby Huanshan City to speculate that the vision may be a "vortex" to a lost civilization."
Egyptology on line resourches
http://egypt.online-resourcen.de/

Royal scenes dated back to Dynasty Zero

The oldest depiction of an Egyptian King wearing the Upper Egyptian crown
“Dr. Maria Carmela Gatto (Director of Aswan-Kom Ombo Archarological Project) made a discovery at Nag el-Hamdulab site (North west of Aswan) of the oldest graffiti shows a King wearing the Upper Egypt headgear(crown) with a group of royal scenes dated back to dynasty zero.” Said Dr. Zahi Hawass. “The find shows many hieroglyphic graffiti and the first drawings shows a complete royal celebration looks exactly like what was known in the different Pharanoic eras, showing the Pharaoh wearing his white crown accompanied by Horus followers or the royal court.”Hawass added."
More on the Dinasty Zero (Naqada III) http://en.wikipedia.org/wiki/Naqada_III

More on the Dynasty Zero

"5,200 year-old rock drawings of earliest Ancient Egyptian celebrations unearthed, by Associated Press, Published: July 4 CAIRO — Egypt’s Antiquities Authority says archaeologists have unearthed a 5,200-year-old rock drawing depicting a royal festival during Ancient Egypt’s earliest dynasty. The ministry says the scenes were part of a series of rock drawings featuring hunting, fighting and celebrations along the banks of the Nile River."

Monday, July 4, 2011

Ice Age Art

L’arte più antica d’America trovata su un osso di mammut, LUGLIO 4, 2011. di Aezio
"I ricercatori dello Smithsonian Institution e dell’Università della Florida hanno confermato la veridicità di un misterioso manufatto scoperto in Florida nel 2006: un frammento osseo, di circa 13.000 anni fa, con incisa l’immagine di un mammut o un mastodonte. Questa incisione è l’esempio più antico e l’unico conosciuto di arte dell’era glaciale a raffigurare un Proboscidato nelle Americhe. La ricerca del team è stato pubblicata sul Journal of Archaeological Science
."

" Scientists Reveal a First in Ice Age Art. June 22, 2011. Researchers from the Smithsonian Institution and the University of Florida have announced the discovery of a bone fragment, approximately 13,000 years old, in Florida with an incised image of a mammoth or mastodon. This engraving is the oldest and only known example of Ice Age art to depict a proboscidean (the order of animals with trunks) in the Americas. The team’s research is published online in the Journal of Archaeological Science. The bone was discovered in Vero Beach, Fla., by James Kennedy, an avocational fossil hunter, who collected the bone and later, while cleaning it, discovered the engraving. Recognizing its potential importance, Kennedy contacted scientists at the University of Florida and the Smithsonian’s Museum Conservation Institute and National Museum of Natural History."

Friday, July 1, 2011

Women on the Nile

"The writings of 19th century travellers in Egypt gave momentum to many European adventurers to excavate more, not only of its antiquities, but also of its social, cultural and religious life. Joan Rees' Women on the Nile (published by the American University in Cairo Press) is an excellent survey with illustrations by David Robert, Giovanni Belzoni, W. H. Bartlett, Owen Jones, Edward Lear and many other Western travellers from different walks of life, but all inspired to visit the heart of the Arab world and describe Egypt, its monuments and people."

A far quasar

"A team of European astronomers, including UK astronomers, have discovered a bright quasar that has been beaming light since the Universe was a mere 770 million years old.
The brilliant beacon, named ULAS J1120+0641, is powered by a black hole with a mass two billion times that of the Sun. Located at a redshift – a term relating to astronomical distances – of 7.1, its light has taken 12.9 billion years to reach us. The next most distant quasar is seen at 870 million years after the big bang, or a redshift of 6.4, although gamma ray bursts have been detected at greater distances of 8.6 and 8.2 redshifts."
Most distant quasar shines brightly

List of Egyptian sites

The Ministry of State for Antiquities (MSA) is responsible for hundreds of sites dating to every period of Egypt’s past. Many have been designated as World Heritage Sites by UNESCO. The web site of MSA is proposing a list of sites organized alphabetically, by region, or by the period to which each site’s main monuments date. http://www.sca-egypt.org/eng/SITE_List.htm

Thursday, June 30, 2011

Plant a New Language in Your Garden

"A world memory champion and a neuroscientist have joined forces to create a language-learning website called Memrise, which combines mnemonic tricks with a game to help users learn quickly and efficiently. Its carefully paced learning structure and competitive points system, the app's developers believe, make their site more effective than other language-learning tools. Memrise makes learning a game with virtual gardens that users must tend. As they do, they also earn points and thereby fight their way up a community-wide leaderboard."
Plant a New Language in Your Mind - Technology Review

Who and where

Who and where: Current and Recent Foreign Missions in Egypt http://www.sca-egypt.org/eng/FMR_CURRENT-MISSIONS_MP.htm
"The principal mission of the Ministry of State for Antiquities, previously known as the Supreme Council of Antiquities, is to protect and promote the cultural heritage of Egypt, both independently and in cooperation with national and international organizations. To achieve its goals, it formulates and implements all policies concerned with antiquities; issues guidelines and permits for the excavation, restoration, conservation, documentation, and study of sites and monuments; and manages a country-wide system of antiquities museums."

Enborne crop circle

From Google Maps.

"A SHARP-eyed Newbury resident spotted this strange formation off the Enborne Road in Newbury while studying computer satellite images. Construction manager Rob Fox, of St John’s Road, was looking for an alternative route to work using on-line aerial maps when he spotted what appeared to be a crop circle outline in ploughed earth."
http://www.newburytoday.co.uk/News/Article.aspx?articleID=10089

Being a red blood cell

"Nanoparticles disguised as red blood cells could be used to deliver anti-cancer drugs directly to a tumour. So say researchers at the University of California at San Diego, whose new technique is unique in its approach to harnessing nanoparticles."
Nanoparticles play at being red blood cells - physicsworld.com

Aircrafts make clouds rain

"For more than 50 years it has been known that aircraft can punch large holes or carve out canals inside clouds as they pass through them – but no-one had been able to explain exactly why this happens. Now researchers in the US have identified the cause by comparing satellite images of clouds with the results of computer modelling. They say that the phenomenon could lead to extra precipitation in the vicinity of major airports."
Aircraft punch holes in clouds and make it rain - physicsworld.com

Dakhla Oasis

A French excavation team made several discoveries in Balat village in the Dakhla Oasis, around 500 km south of Cairo. More at http://www.archaeogate.org/egittologia/article/1427/1/recenti-scoperte-archeologiche-nelloasi-di-dakhla.html
http://www.almasryalyoum.com/en/node/470508 and also
An ancient Egyptian federation

An ancient Egyptian federation

E il faraone inventò lo Stato federale, by Aristide Malnati
"Il federalismo ha avuto la prima manifestazione storica nell’Antico Egitto. ... è la conclusione dell’analisi degli elementi archeologici e storici, emersi in 30 anni di scavo sistematico sul sito di Balat, capoluogo dell’Oasi di Dakhla (200 Km a Ovest dell’odierna Luxor) durante il regno dei sovrani della VI Dinastia (2300-2200 a. C.); scavo condotto dall’archeologo francese Georges Soukiassian alla testa di un’équipe internazionale." Balat  è il più antico abitato egizio giunto fino a noi. "A Balat sono state rinvenute imponenti vestigia di quello che fu il fulcro del potere della regione più ricca d’Egitto, in particolare (ma non solo) durante la VI Dinastia. Qui risiedevano e facevano il bello e cattivo tempo i Governatori di tutta l’Oasi ... Godevano di forte autonomia e di reale possibilità di incidere anche in decisioni di politica nazionale. ... Se passiamo poi alla necropoli per l’eterno riposo dei, diremmo oggi, Presidenti della regione, il quadro della venerazione, in cui erano tenuti, si completa: ognuno fu sepolto in una mastaba, un’imponente sepoltura a sviluppo sotterraneo (quasi una piramide rovesciata), che sfociava nella camera funeraria superbamente affrescata con scene".
More
http://www.avvenire.it/Cultura/faraone_201106301208149670000.htm

As reported by Aristide Malnati, federalism had been developed for the first time in the ancient Egypt. This is a conclusion after analysis of archaeological and historical elements, lasted for 30 years during the systematic excavations on the site of Balat, Dakhla Oasis (200 km due west of Luxor). The period was that of the Sixth Dynasty (2300-2200 BC). The excavation is lead by the French archaeologist Georges Soukiassian.
Balat is considered the oldest Egyptian village. It was the most powerful center in one of the richest regions in Egypt, particularly during the Sixth Dynasty. Here lived the Governors of Oasis, having wide autonomy from the king and a real possibility to influence the decisions of the national policy.

Tuesday, June 28, 2011

New Pharaonic artefacts discovered in North Egypt - Ahram Online

"New Pharaonic artefacts discovered in North Egypt's site of San El-Hagar
A collection of painted blocks used in the construction of king Osorkon II’s temple have been unearthed in San El-Hagar in the Delta city of Sharqia"
New Pharaonic artefacts discovered in North Egypt's site of San El-Hagar - Ancient Egypt - Heritage - Ahram Online

Monday, June 27, 2011

A "Mobius" graphene

"In 1858, August Mobius dreamt up a shape with a single surface and only one edge. The Mobius strip has fascinated children and scientists alike since then.
How small can these shapes be? In December 2003, German chemists made a molecular Mobius strip out of a benzene-like ring modified with a belt-like carbon structure. Since then, various groups have produced increasingly bizarre Mobius-type molecules, including one that can switch back and forth from a Mobius to an ordinary strip when zapped with light.
Of course, the obvious choice of material with which to make Mobius molecules is graphene. But this particular trick has eluded chemists, an omission that clearly irks. Now Douglas Galvao from the Universidade Estadual de Campinas in Sao Paolo, Brazil, and buddies have decided to grip the bull by the horns and calculated the properties that Mobius carbon might have."New form of "Mobius" carbon predicted - Technology Review

Farewell Lieutenant Columbo

"Peter Michael Falk (September 16, 1927 – June 23, 2011) was an American actor, best known for his role as Lieutenant Columbo in the television series Columbo. He appeared in numerous films and television guest roles and was nominated for an Academy Award twice (for 1960's Murder, Inc. and 1961's Pocketful of Miracles), and won the Emmy Award on five occasions (four for Columbo) and the Golden Globe award once. Director William Friedkin, when discussing Falk's role in his 1978 film The Brink's Job said that "Peter has a great range from comedy to drama. He could break your heart or he could make you laugh.""


Friday, June 24, 2011

Hot quarks break free

"Physicists in the US, India and China have calculated that quarks and gluons can break free from their confinement inside protons and neutrons at a temperature of around two trillion degrees Kelvin – the temperature of the universe a fraction of a second after the Big Bang. The researchers arrived at this figure by combining the results of supercomputer calculations and heavy-ion collision experiments. They say that it puts our knowledge of quark matter on a firmer footing."

Quarks break free at two trillion degrees - physicsworld.com

Wrinklons

"A new quasiparticle called the "wrinklon" could help explain why materials as diverse as graphene and household curtains wrinkle in much the same way – despite their very different length scales. The particle has been introduced by researchers in Belgium, France and the US as a result of measurements on a wide range of materials on length scales from micrometres to metres. While the work may not lead to more attractive curtains, wrinkles do turn out to affect the electronic properties of graphene and the analysis could therefore influence the development of graphene-based devices."

Introducing the 'wrinklon' - physicsworld.com

Voyager mission at the edge of the solar system

"Recent data from the spacecraft have shown a gentle decrease in the velocity of the solar wind at the heliopause – the outer boundary of the heliosheath – not the abrupt discontinuity predicted by current theories. Also, scientists looking at other data from both Voyager 1 and Voyager 2 have found that the magnetic field in the heliosheath is a tumultuous foam of magnetic bubbles, as compared to the graceful arcs of magnetic field lines they had expected."

More surprises for the Voyager mission at the edge of the solar system - physicsworld.com

Thursday, June 23, 2011

Khufu’s second solar boat revealed

"Today, hundreds of foreign and Egyptian journalists along with photographers, cameramen and TV presenters flocked to the Giza Plateau, where Minister of State for Antiquities Zahi Hawass, Chargé d’Affaires at the Japanese Embassy to Egypt Masami Kinefuchi, and the chief executive representative of the Nitori Holding Company, Akio Nitori, unveiled King Khufu’s second solar boat. This boat was first discovered in 1954 by Egyptian architect and archaeologist Kamal El-Malakh with fellow archaeologist Zaki Nour during routine cleaning at the southern side of Khufu’s Great Pyramid. The first pit was found under a roof of 41 limestone slabs. Removing one of these slabs, a cedar boat, completely dismantled but arranged in the semblance of its finished form, was found along with layers of mats, ropes, instruments made of flint and some small pieces of white plaster with 12 oars, 58 poles, three cylindrical columns and five doors."

Wednesday, June 22, 2011

Documentos de Antonio Raimondi serán restaurados y digitalizados

"Se recuperarán libretas, acuarelas, planos y láminas hechas por el sabio.
Gracias al convenio firmado entre el Archivo General de la Nación (AGN) y la Asociación Educacional ‘Antonio Raimondi’ será posible restaurar y digitalizar la colección del sabio italiano, que data de los años 1852 a 1869, anunció el ministro de Cultura, Dr. Juan Ossio Acuña. "
Documentos de Antonio Raimondi serán restaurados y digitalizados

Thursday, June 16, 2011

Peer pressure keeps planets young...

"Two US astrophysicists claim they have answered an important question about how planets form: why don't young planets get pushed into their companion stars before they have a chance to grow? It turns out that a little company is enough to keep them there, say the researchers, who argue that multiple planets moving through a rocky disk can prevent one another from falling into the star."
Peer pressure keeps young planets growing - physicsworld.com

Tuesday, June 14, 2011

On sunspots and solar flux

Recurrence plots of sunspots, solar flux and irradiance
by AC Sparavigna
The paper shows the recurrence and cross recurrence plots of three time series, concerning data of the solar activity. The data are the sunspot number and the values of solar radio flux at 10.7 cm and of solar total irradiance, which are known as highly correlated. To compare the series, the radio flux and irradiance values are monthly averaged. Recurrence plots display the oscillating behaviour with remarkable features. Moreover, cross recurrence plots help in identifying time lags between the sunspot number maximum and the maximum of radio or irradiance signals, in circumstances where the data values are highly dispersed. Image processing is useful too, in enhancing the monitoring. An interesting behaviour is displayed by cross recurrence plots of irradiance, which are not symmetric with respect to the line of identity.

Hygroscopic properties of volcanic ash

Hygroscopic properties of volcanic ash
GEOPHYSICAL RESEARCH LETTERS, VOL. 38, L11802, 4 PP., 2011
doi:10.1029/2011GL047298
by  P. Kumar T. L. Lathem A. Nenes J. Dufek I. N. Sokolik M. Trail A. Russell
Volcanic ash is hygroscopic
Water vapor adsorption is the main proceess controlling ash hygroscopicity
The results can be parameterized in a simple correlation for use in models
"Limited observational data exists on the physical interactions between volcanic ash particles and water vapor; yet it is thought that these interactions can strongly impact the microphysical evolution of ash, with implications for its atmospheric lifetime and transport, as well as formation of water and ice clouds. ...The hygroscopicity of the ash particles is quantified by their ability to uptake water and nucleate into cloud drops under controlled levels of water vapor supersaturation. Evidence presented strongly suggests that ash uptakes water efficiently via adsorption and a simple parameterization of ash hygroscopicity is developed for use in ash plume and atmospheric models."

Shrinking atmospheric layer linked to low levels of solar radiation

Changes in the solar energy output may cause the outer atmosphere to contract.
Researches are also showing that solar cycling has differences in the minimum values.
Shrinking atmospheric layer linked to low levels of solar radiation