Mechanisms of the Ancient Greek Theater

1992 ◽  
Author(s):  
Andrew D. Dimarogonas
Keyword(s):  
The Political ◽  
Path Generation ◽  
Space Travel ◽  
Ancient Greek ◽  
Machine Element ◽  
Four Bar Linkage ◽  
Indirect Information ◽  
First Time ◽  
Latin Term

Abstract The word Mechanism is a derivative of the Greek word mechane (which meant machine, more precisely, machine element) meaning an assemblage of machines. While it was used for the first time by Homer in the Iliad to describe the political manipulation, it was used with its modern meaning first in Aeschylos times to describe the stage machine used to bring the gods or the heroes of the tragedy on stage, known with the Latin term Deus ex machina. At the same time, the word mechanopoios, meaning the machine maker or engineer, was introduced for the man who designed, built and operated the mechane. None of these machines, made of perishable materials, is extant. However, there are numerous references to such machines in extant tragedies or comedies and vase paintings from which they can be reconstructed: They were large mechanisms consisting of beams, wheels and ropes which could raise weights up-to one ton and, in some cases, move them back-and-forth violently to depict space travel, when the play demanded it. The vertical dimensions were over 4 m while the horizontal travel could be more than 8 m. They were well-balanced and they could be operated, with some exaggeration perhaps, by the finger of the engineer. There is indirect information about the timing of these mechanisms. During the loading and the motion there were specific lines of the chorus, from which we can infer the duration of the respective operation. The reconstructed mechane is a spatial three- or four-bar linkage designed for path generation.

“Deus-Ex-Machina” Mechanism Reconstruction in the Theater of Phlius, Corinthia

2009 ◽  
Vol 132 (1) ◽  
Author(s):  
Argyris S. Papadogiannis ◽  
Marilena C. Tsakoumaki ◽  
Thomas G. Chondros
Keyword(s):  
Planar Motion ◽  
Path Generation ◽  
Ancient Greek ◽  
Single Beam ◽  
Greek Drama ◽  
Archeological Evidence ◽  
Lifting System ◽  
Latin Term

In some ancient Greek drama plays, the stage machine used to bring the gods or the heroes of the tragedy on stage, known with the Latin term deus-ex-machina, was used for the solution of an apparently insoluble crisis. A twin-facing stone base was found in the theater of Phlius in Corinthia, Greece, behind the stage building. The existence of similar foundations in other ancient theaters indicates their use for specific purposes connected with the needs of the play. An attempt to reconstruct the mechanism is presented based on archeological evidence and literary descriptions. The reconstructed mechanism was designed for path generation and comprised a single beam with ropes controlling its planar motion and a sidle twin lifting system.

Politični položaj na Slovenskem leta 1919

2020 ◽  
Vol 20 (2020) (2) ◽  
pp. 359-394
Author(s):  
Jurij Perovšek
Keyword(s):  
State Government ◽  
The State ◽  
The Political ◽  
Liberal Party ◽  
New Era ◽  
Party Organisation ◽  
Western Border ◽  
Historical Phenomenon ◽  
First Time ◽  
Similar Development

For Slovenes in the Kingdom of the Serbs, Croats and Slovenes the year 1919 represented the final step to a new political beginning. With the end of the united all-Slovene liberal party organisation and the formation of separate liberal parties, the political party life faced a new era. Similar development was showing also in the Marxist camp. The Catholic camp was united. For the first time, Slovenes from all political camps took part in the state government politics and parliament work. They faced the diminishing of the independence, which was gained in the State of Slovenes, Croats and Serbs, and the mutual fight for its preservation or abolition. This was the beginning of national-political separations in the later Yugoslav state. The year 1919 was characterized also by the establishment of the Slovene university and early occurrences of social discontent. A declaration about the new historical phenomenon – Bolshevism, had to be made. While the region of Prekmurje was integrated to the new state, the questions of the Western border and the situation with Carinthia were not resolved. For the Slovene history, the year 1919 presents a multi-transitional year.

A Confrontation between Two Doctrines: The Birth of Struggle for Hegemony in Hebrew Children's Literature during the 1930s and 1940s

2008 ◽  
Vol 1 (2) ◽  
pp. 139-155 ◽  
Author(s):  
YAEL DARR
Keyword(s):  
Children's Literature ◽  
Educational System ◽  
Single Channel ◽  
Children’S Literature ◽  
The Political ◽  
Literary Creation ◽  
History Of ◽  
High Level ◽  
First Time ◽  
Literary Quality

This article describes a crucial and fundamental stage in the transformation of Hebrew children's literature, during the late 1930s and 1940s, from a single channel of expression to a multi-layered polyphony of models and voices. It claims that for the first time in the history of Hebrew children's literature there took place a doctrinal confrontation between two groups of taste-makers. The article outlines the pedagogical and ideological designs of traditionalist Zionist educators, and suggests how these were challenged by a group of prominent writers of adult poetry, members of the Modernist movement. These writers, it is argued, advocated autonomous literary creation, and insisted on a high level of literary quality. Their intervention not only dramatically changed the repertoire of Hebrew children's literature, but also the rules of literary discourse. The article suggests that, through the Modernists’ polemical efforts, Hebrew children's literature was able to free itself from its position as an apparatus controlled by the political-educational system and to become a dynamic and multi-layered field.

Islamic and Jewish Religious Feminists Tackle Islamic and Jewish Oral Law: Maintenance and Rebellion of Wives

2017 ◽  
Vol 11 (1) ◽  
pp. 35-63
Author(s):  
Ruth Roded
Keyword(s):  
State Policy ◽  
Political System ◽  
Daily Life ◽  
The State ◽  
The Political ◽  
Jewish Law ◽  
Modern Times ◽  
Parallel Case ◽  
First Time

Beginning in the early 1970s, Jewish and Muslim feminists, tackled “oral law”—Mishna and Talmud, in Judaism, and the parallel Hadith and Fiqh in Islam, and several analogous methodologies were devised. A parallel case study of maintenance and rebellion of wives —mezonoteha, moredet al ba?ala; nafaqa al-mar?a and nush?z—in classical Jewish and Islamic oral law demonstrates similarities in content and discourse. Differences between the two, however, were found in the application of oral law to daily life, as reflected in “responsa”—piskei halacha and fatwas. In modern times, as the state became more involved in regulating maintenance and disobedience, and Jewish law was backed for the first time in history by a state, state policy and implementation were influenced by the political system and socioeconomic circumstances of the country. Despite their similar origin in oral law, maintenance and rebellion have divergent relevance to modern Jews and Muslims.

The Internal Stakes of the 2005 Elections: The Struggle for Influence in Egypt's National Democratic Party

2007 ◽  
Vol 61 (1) ◽  
pp. 95-111
Author(s):  
Virginie Collombier
Keyword(s):  
Democratic Party ◽  
Political System ◽  
The Political ◽  
Legislative Elections ◽  
The Future ◽  
External Actors ◽  
First Time

Beyond the relative opening of the political system that characterized 2005 in Egypt — with the President being elected directly for the first time and the increased competition allowed during legislative elections — the 2005 elections also constituted an opportunity to consider and evaluate the internal struggles for influence under way within the ruling National Democratic Party (NDP). In a context largely influenced by the perspective of President Husni Mubarak's succession and by calls for reform coming from both internal and external actors, changes currently occurring at the party level may have a decisive impact on the future of the Egyptian regime.

Coleridge's “ideal Realism”: an alternative to the “doctors of the Absolute”?

1995 ◽  
Vol 16 (01) ◽  
pp. 1-16
Author(s):  
Mary Anne Perkins
Keyword(s):  
Political Philosophy ◽  
Common Ground ◽  
Samuel Taylor Coleridge ◽  
The Political ◽  
Close Reading ◽  
Magnum Opus ◽  
The Absolute ◽  
First Time

A few months ago I read Peter Nicholson's The Political Philosophy of the British Idealists for the first time. In the index I found more than a hundred references to Hegel and only one to Samuel Taylor Coleridge. However, as many of the latter's writings, published for the first time in recent years, become generally accessible there is an increasing sense that he has been unfairly deprived of his due status as a philosopher. This is partly, no doubt, the syndrome of the prophet in his own country and partly the inevitable consequence of much of his later work remaining unpublished until recent years. Coleridge himself, with what some would take to be confirmation of an over-sensitivity to criticism, felt the neglect of his work went deeper and betrayed an anti-philosophical trait in British character. Despite his close reading of the work of many of his German contemporaries it seems that he did not read more than sixtyone pages of Hegel's Wissenschaft der Logik. His margin notes to this work are, on the whole, negative in their criticism. However, despite significant disagreements, there is much common ground in theme, argument and conclusion between his many drafts of the ‘Logosophia’, his intended magnum opus, and Hegel's system.

La part d’Henri Weil dans l’édition du De la musique attribué à Plutarque (Paris, E. Leroux, 1900)

2017 ◽  
Vol 5 (2) ◽  
pp. 233-265
Author(s):  
Laurent Calvié
Keyword(s):  
Original Condition ◽  
Ancient Greek ◽  
Close Collaboration ◽  
First Time ◽  
Ancient Texts

The Weil-Reinach edition of the De musica attributed to Plutarch is the result of a close collaboration of two among the best philologists and specialists of ancient Greek music active in France between the 19th and the 20th centuries : H. Weil and his pupil Th. Reinach. The latter (who personally provided the collation of the manuscripts, some of the exegetical notes and the index) put together the material, but it was Weil who should be regarded as primarily responsible for the work, whose overall organization and component parts are perfectly consistent with the principles and methods that he had already applied to his previous editions : the subordination of the criticism of the texts, founded on the recension of manuscripts, to their history and interpretation. The interventionism typical of this publication derives from the extremely ambitious target that Weil imposed on all his ecdotic works : the reconstruction not of the corrupt archetype of the extant Byzantine and Humanist manuscripts, but of the original condition of the ancient texts. Viewed in this light, the Weil-Reinach edition of the De musica is a treasure of erudition and intelligence, in which the textual problems of a text, which had been deeply altered since antiquity, are raised for the first time.

Synthesis and Balancing of Cam-Modulated Linkages

1987 ◽  
Author(s):  
P. Pracht ◽  
P. Minotti ◽  
M. Dahan
Keyword(s):  
Systematic Approach ◽  
Kinematic Chain ◽  
Path Generation ◽  
Industrial Manipulator ◽  
High Speeds ◽  
Structural Error ◽  
Mass Balancing ◽  
Four Bar Linkage ◽  
Robotic Applications ◽  
Class Of Functions

Abstract Linkages are inherently light, inexpensive, strong, adaptable to high speeds and have little friction. Moreover the class of functions suitable for linkage representation is large. For all these reasons numerous recent works deal with the problem of design mechanisms for robotic applications, but very often in terms of components such as gripper, transmission, balancing. We investigate a new application for linkages, using them to design industrial manipulator. The selected mechanism for this application is a four bar linkage with an adjustable lengh for exact path generation. This adjustment is performed by a track or cam which is substituted to a bar. By this mean, we define a cam-modulated linkage which possess superior accuracy potential and is capable of accomodating of industrial design restrictions. Such a kinematic chain is free from structural error for path generation and the presence of the track introduces the flexibility and versality in the usefull four bar chain. The synthesis technique of cam modulated linkage utilizes loop closure equations, envelop theory to find the centerline and the profile of the track. These techniques provide a systematic approach to the design of mechanism for path generation when extreme accuracy is required. In order to complete an contribution, we take in consideration the static balancing of the synthesized manipulator. To achieve static mass balancing we use the potential energy storage capabilities of linear springs, and integrated it with the non-linear motion of mechanism to provide an exact value of the desired counter loading functions. Examples are worked to demonstrate applications of these procedures and to illustrate the industrial potential of spring balancing and cam-modulated linkage.

Eliminating Structural Error in Real-Time Adjustable Four-Bar Path Generators Using Iterative Learning Control

2004 ◽  
Author(s):  
Hong-Jen Chen ◽  
Richard W. Longman ◽  
Meng-Sang Chew
Keyword(s):  
Control Systems ◽  
Real Time ◽  
Iterative Learning Control ◽  
Learning Control ◽  
Iterative Learning ◽  
Path Generation ◽  
Structural Error ◽  
Four Bar Linkage

Fundamental concepts of Iterative Learning Control (ILC) are applied to path generating problems in mechanisms. As an illustration to such class of problems, an adjustable four-bar linkage is used. The coupler point of a four-bar traces a coupler curve that will in general deviate from the desired coupler path. Except at the precision points, the coupler curve will exhibit some structural error, which is the deviation from the specified curve. The structural error will repeat itself every cycle at exactly the same points over the range of interest. Since ILC is a methodology that was developed to handle similar repetitive errors in control systems, it is believed that it will be well served to apply it to this class of problems. Results show that ILC can be simple to implement, and it is found to be very well suited for such path generation problems.

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