Alexander von Humboldt: Galvanism,Animal Electricity,and Self-Experimentation Part 2: The Electric Eel,Animal Electricity,and Later Years

After extensive experimentation during the 1790s, Alexander von Humboldt remained skeptical about “animal electricity” (and metallic electricity), writing instead about an ill-defined galvanic force. With his worldview and wishing to learn more, he studied electric eels in South America just as the new century began, again using his body as a scientific instrument in many of his experiments. As had been the case in the past and for many of the same reasons, some of his findings with the electric eel (and soon after, Italian torpedoes) seemed to argue against biological electricity. But he no longer used galvanic terminology when describing his electric fish experiments. The fact that he now wrote about animal electricity rather than a different “galvanic” force owed much to Alessandro Volta, who had come forth with his “pile” (battery) for multipling the physical and perceptable effects of otherwise weak electricity in 1800, while Humboldt was deep in South America. Humboldt probably read about and saw voltaic batteries in the United States in 1804, but the time he spent with Volta in 1805 was probably more significant in his conversion from a galvanic to an electrical framework for understanding nerve and muscle physiology. Although he did not continue his animal electricity research program after this time, Humboldt retained his worldview of a unified nature and continued to believe in intrinsic animal electricity. He also served as a patron to some of the most important figures in the new field of electrophysiology (e.g., Hermann Helmholtz and Emil du Bois-Reymond), helping to take the research that he had participated in to the next level.     

The Festival of St John: Norm and Change in Civitella Roveto in Abruzzo (Italy)

This essay describes the festival of Saint John (24 June) at Civitella Roveto in the province of Aquila, Italy. The ritual is analysed as it was at the beginning of the twentieth century and in its contemporary form, in order to reconstruct the norm of the festival and thereby to show the main transformations of the event, and its shifting social context. In addition, the research highlights the connection between the festival and the ritual cycle, investigated in terms of its interaction with the productive cycle of the community and with the cosmic cycle. Finally, the new social and symbolic meanings assumed by the figure of St John and his festival are brought to light.     

A fragile political sphere

The Italian political sphere is characterized by an endemic fragility whose origins can be traced back to the post-unification practice of trasformismo and the ensuing system originally summarized by Paolo Farneti as ‘monopolist coalition’. Here, through shifts in alliances and personal agreements, a powerful centre coalition permanently holds power and blocks the opposition from becoming a possible alternative government. The ruling class fails to function as a party and uses parliament and the government as organizational tools of its hegemony. As a consequence, the functioning of the democratic system is distorted and the role of the public sphere inhibited. From the Risorgimento, through fascism, to the First and Second Republics and Berlusconism, this article assesses the fragility of Italy's political sphere as a recurrent constant in the history of the nation and the result of ‘tare storiche’ that remain unhealed.     

Post-electoral politics in Italy: institutional problems and political perspectives

A dysfunctional electoral law and an obsolete bicameral Parliament contributed to the surprising results of the 24–25 February 2013 Italian elections, which have solved none of Italy's institutional and political problems. This article briefly analyses the distribution of votes, stressing especially that the success of the Five Stars Movement derives from the dissatisfaction and the protest of a significant sector of the electorate. Beppe Grillo, like Silvio Berlusconi, is a political entrepreneur, who through patience, hard work and commitment has constructed an organization with a wide geographical following. The presence in Parliament of the Five Stars Movement made the election of the President of the Republic very difficult. President Napolitano was obliged to accept an unprecedented second term and then led the Democratic Party, the People of Freedom and Civic Choice to form an unusual government, almost a sort of Grand Coalition. The government is here briefly assessed. The article ends underlining two critical aspects of the situation. Neither the Italian parties nor the party system have succeeded in reaching a satisfactory level of consolidation and stability. This means that the President of the Republic has been obliged to make good the shortcomings of the political parties. Even malgré soi, the President's behaviour has given rise to a situation in which his own position raises the urgent need for institutional reforms along the lines of the semi-presidential mould of the French Fifth Republic to bring to a close Italy's overlong political transition.     

Use of Pushover Analysis for Predicting Seismic Response of Irregular Buildings: A Case Study

Structural irregularity undermines capability of conventional methods for 2D pushover analysis to closely approximate results from inelastic dynamic analysis. In recent years, different methods have been developed to overcome such limitation and their suitability has been checked with reference either to idealized building models or to geometrically simple tested structures. In this paper, suitability of one such method, proposed by Fajfar et al. [2005] Fajfar, P., Maru?i?, D. and Perus, I. 2005. Torsional effects in the pushover-based seismic analysis of buildings. Journal of Earthquake Engineering, 9(6): 831–854. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar], is evaluated considering an existing school building which presents both vertical and plan irregularities. Types of irregularity encompass not only those usually considered by seismic codes but also those deriving from a bad conceptual design and construction inaccuracies, very frequent at the year of construction (1974). It is found that, even under such complex irregularity conditions, this ‘modified’ pushover analysis correlates well results from inelastic dynamic analysis almost up to failure, since, in most cases, its predictions of interstorey drifts and plastic rotations are conservatively close to values from inelastic dynamic analysis. Even failure mechanism, consisting of a floor mechanism at the third level, is correctly predicted, thus demonstrating adequacy of such method for actual framed structures.     

Ductility of a Structural Wall with Spread Rebars Tested in Full Scale

The experimental work focuses on the ductility of the reinforced concrete (RC) seismic structural walls in buildings of mid-rise height. A full-scale five-story structural wall was tested to obtain results, still scarce in literature, without the influence of size effect. An unusual detailing with large diameter longitudinal rebars uniformly distributed in the wall length was adopted to prevent premature web rebar fracture and shear sliding. The plastic hinge length and deformations were evaluated in detail. The results show the high ductility of the wall that reached a total drift of 2.5%, larger than those usually required in design.     

The 21st International Conference on the History of Cartography

Abstract

Maps showing a town together with its surroundings form a distinctive, if diverse, genre, the environs map. Such maps can be described according to function or intended use and include military, administrative, judicial, economic and communications maps as well as maps associated with the development of recreation and with local improvement projects. In this paper, attention is focused on two types of environs maps from Vienna: those showing projected hydrological schemes and those prepared primarily for use in connection with recreational facilities for the townsfolk.     

The Secrets of a long life: The Dutch firm of covens & mortier (1685–1866) and their copper plates

Abstract

Commercial map publishing firms between the mid‐sixteenth and mid‐nineteenth centuries needed to prolong the life of their copper plates for as long as possible. In order to avoid the costs of engraving new plates, the famous Dutch publishing house of Covens & Mortier of Amsterdam (1685–1866) amended existing plates for topographical and politico‐administrative changes, engraving errors, imprint alterations and marks resulting from general wear. Not only were the plates altered, but the printed maps themselves were sometimes also modified: a new title cartouche might be pasted on or a date or part of the text scratched away. In these ways the map publishing firm was a master of creative solutions as regards both the re‐use of old copper plates and the ‘renewal’ of old printed maps.