arXiv subjects

A. Voulgaris

Publications and source records attributed to A. Voulgaris.

3 recordsLinked to original sources

arXiv2023

The reconstruction of the Antikythera Mechanism Instruction Manual after a diligent study and analysis of the Back cover inscription (Part-1 and Part-2)

The Inscriptions which were on the Back Cover of the Antikythera Mechanism were the Users Manual of the Antikythera Mechanism. In the Back Cover Inscription Part 1 text, the Presentation, Position, and Operation of the outer parts of the Mechanism Front face was engraved by the ancient manufacturer. Although this technical text is partially or poorly preserved, useful information, results and conclusions were retracted by studying the words and the sentences adapted on their original geometrical positions, concerning the image of the Mechanism front face. After the study and the analysis of the preserved text and its characteristics, the missing text completion is presented. A significant part of the reconstructed text was reproduced using the preserved words and phrases. In many cases the reconstructed text can be considered as definite. The use of the authors Antikythera Mechanism functional model was critical for the analysis and understanding the preserved text, contributing to the design and reconstruction of the Mechanism Front Face parts, which are not preserved nowadays.

physics.hist-ph↗

arXiv2023

The Draconic gearing of the Antikythera Mechanism: Assembling the Fragment D, its role and operation

The unplaced Fragment D of the Antikythera Mechanism with an unknown operation was a mystery ever since it was discovered. The gear r1, which was detected in Fragment D radiographies by C. Karakalos is preserved in excellent condition but this was not enough to directly relate it to the existing gear trains of the Mechanism. The suggestion that Fragment D could be a part of the hypothetical planet indication gearing is a hypothesis, in contradiction with the AMRP tomographies, and leads to mechanical malfunctions. The analysis of AMRP tomographies of Fragment D and its mechanical characteristics, revealed that it could be part of the Draconic gearing. Currently, the three lunar cycles Synodic, Sidereal and Anomalistic are represented on the Antikythera Mechanism. Although the Draconic cycle was well known during the Mechanism era as representing the critical fourth Lunar cycle, it seems that it is missing from the Antikythera Mechanism. The study of Fragment D was supported by our bronze reconstructions of the Fragment D, leading to the reconstruction of the Draconic gearing. These results are very important, because with the use of only one hypothetical,missing gear, the Draconic gearing is revealed on the Antikythera Mechanism. Fragment D(raconic) can be perfectly correlated with the Draconic cycle of the Antikythera Mechanism without mechanical problems and the four lunar cycles appear on the Mechanism. Based on the Draconic pointer, the eclipse events can be calculated and engraved on the Saros spiral cells.

physics.pop-ph↗

arXiv2010

A Comparison of the Red and Green Coronal Line Intensities at the 29 March 2006 and the 1 August 2008 Total Solar Eclipses: Considerations of the Temperature of the Solar Corona

During the total solar eclipse at Akademgorodok, Siberia, Russia, in 1 August 2008, we imaged the flash spectrum with a slitless spectrograph. We have spectroscopically determined the duration of totality, the epoch of the 2nd and 3rd contacts and the duration of the flash spectrum (63 s during ingress and 48 s during egress). Here we compare the 2008 flash spectra with those that we similarly obtained from the total solar eclipse of 29 March 2006, at Kastellorizo, Greece. Any changes of the intensity of the corona emission lines, in particularly those of [Fe X] and [Fe XIV], could give us valuable information about the energy content of the solar corona and the temperature distribution of the corona. The results show that the high-ionization state, the [Fe XIV] emission line, was much weaker during the 2008 eclipse, indicating that following the long, inactive period during the solar minimum, there was a drop in the overall temperature of the solar corona.

astro-ph.SR↗