keyword
https://read.qxmd.com/read/34616053/mechanical-computing
#1
REVIEW
Hiromi Yasuda, Philip R Buskohl, Andrew Gillman, Todd D Murphey, Susan Stepney, Richard A Vaia, Jordan R Raney
Mechanical mechanisms have been used to process information for millennia, with famous examples ranging from the Antikythera mechanism of the Ancient Greeks to the analytical machines of Charles Babbage. More recently, electronic forms of computation and information processing have overtaken these mechanical forms, owing to better potential for miniaturization and integration. However, several unconventional computing approaches have recently been introduced, which blend ideas of information processing, materials science and robotics...
October 2021: Nature
https://read.qxmd.com/read/34429464/author-correction-a-model-of-the-cosmos-in-the-ancient-greek-antikythera-mechanism
#2
Tony Freeth, David Higgon, Aris Dacanalis, Lindsay MacDonald, Myrto Georgakopoulou, Adam Wojcik
No abstract text is available yet for this article.
August 24, 2021: Scientific Reports
https://read.qxmd.com/read/33712674/a-model-of-the-cosmos-in-the-ancient-greek-antikythera-mechanism
#3
JOURNAL ARTICLE
Tony Freeth, David Higgon, Aris Dacanalis, Lindsay MacDonald, Myrto Georgakopoulou, Adam Wojcik
The Antikythera Mechanism, an ancient Greek astronomical calculator, has challenged researchers since its discovery in 1901. Now split into 82 fragments, only a third of the original survives, including 30 corroded bronze gearwheels. Microfocus X-ray Computed Tomography (X-ray CT) in 2005 decoded the structure of the rear of the machine but the front remained largely unresolved. X-ray CT also revealed inscriptions describing the motions of the Sun, Moon and all five planets known in antiquity and how they were displayed at the front as an ancient Greek Cosmos...
March 12, 2021: Scientific Reports
https://read.qxmd.com/read/30412625/improved-x-ray-computed-tomography-reconstruction-of-the-largest-fragment-of-the-antikythera-mechanism-an-ancient-greek-astronomical-calculator
#4
JOURNAL ARTICLE
Ashkan Pakzad, Francesco Iacoviello, Andrew Ramsey, Robert Speller, Jennifer Griffiths, Tony Freeth, Adam Gibson
The Antikythera Mechanism is an extraordinarily complex ancient Greek astronomical calculating device whose mode of operation is now relatively well understood particularly since imaging studies in 2005 revealed gears and inscriptions which were previously illegible. Unfortunately, the highest resolution X-ray computed tomography image of the largest fragment had some errors which meant that the reconstructed images were not as clear as had been expected. Here, the original X-ray data have been reanalysed and reconstructed...
2018: PloS One
https://read.qxmd.com/read/25075747/eclipse-prediction-on-the-ancient-greek-astronomical-calculating-machine-known-as-the-antikythera-mechanism
#5
JOURNAL ARTICLE
Tony Freeth
The ancient Greek astronomical calculating machine, known as the Antikythera Mechanism, predicted eclipses, based on the 223-lunar month Saros cycle. Eclipses are indicated on a four-turn spiral Saros Dial by glyphs, which describe type and time of eclipse and include alphabetical index letters, referring to solar eclipse inscriptions. These include Index Letter Groups, describing shared eclipse characteristics. The grouping and ordering of the index letters, the organization of the inscriptions and the eclipse times have previously been unsolved...
2014: PloS One
https://read.qxmd.com/read/22957116/migratory-birds-ticks-and-bartonella
#6
JOURNAL ARTICLE
Ylva Molin, Mats Lindeborg, Fredrik Nyström, Maxime Madder, Eva Hjelm, Björn Olsen, Thomas G T Jaenson, Christian Ehrenborg
Bartonella spp. infections are considered to be vector-borne zoonoses; ticks are suspected vectors of bartonellae. Migratory birds can disperse ticks infected with zoonotic pathogens such as Rickettsia and tick-borne encephalitis virus and possibly also Bartonella. Thus, in the present study 386 tick specimens collected in spring 2009 from migratory birds on the Mediterranean islands Capri and Antikythera were screened for Bartonella spp. RNA. One or more ticks were found on 2.7% of the birds. Most ticks were Hyalomma rufipes nymphs and larvae with mean infestation rates of 1...
2011: Infection Ecology & Epidemiology
https://read.qxmd.com/read/18668103/calendars-with-olympiad-display-and-eclipse-prediction-on-the-antikythera-mechanism
#7
JOURNAL ARTICLE
Tony Freeth, Alexander Jones, John M Steele, Yanis Bitsakis
Previous research on the Antikythera Mechanism established a highly complex ancient Greek geared mechanism with front and back output dials. The upper back dial is a 19-year calendar, based on the Metonic cycle, arranged as a five-turn spiral. The lower back dial is a Saros eclipse-prediction dial, arranged as a four-turn spiral of 223 lunar months, with glyphs indicating eclipse predictions. Here we add surprising findings concerning these back dials. Though no month names on the Metonic calendar were previously known, we have now identified all 12 months, which are unexpectedly of Corinthian origin...
July 31, 2008: Nature
https://read.qxmd.com/read/17136087/decoding-the-ancient-greek-astronomical-calculator-known-as-the-antikythera-mechanism
#8
JOURNAL ARTICLE
T Freeth, Y Bitsakis, X Moussas, J H Seiradakis, A Tselikas, H Mangou, M Zafeiropoulou, R Hadland, D Bate, A Ramsey, M Allen, A Crawley, P Hockley, T Malzbender, D Gelb, W Ambrisco, M G Edmunds
The Antikythera Mechanism is a unique Greek geared device, constructed around the end of the second century bc. It is known that it calculated and displayed celestial information, particularly cycles such as the phases of the moon and a luni-solar calendar. Calendars were important to ancient societies for timing agricultural activity and fixing religious festivals. Eclipses and planetary motions were often interpreted as omens, while the calm regularity of the astronomical cycles must have been philosophically attractive in an uncertain and violent world...
November 30, 2006: Nature
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