Towards a Multi-Agent-Based Modelling of Obsidian Exchange in the Neolithic Near East

This paper examines an alternative approach to previously proposed models of prehistoric exchange such as the law of monotonic decrement or the down-the-line exchange model developed by Renfrew (Proceedings of the Prehistoric Society 34: 319–331, 1968, Renfrew 1977) to explain the distribution of obsidian across the Near East during the Neolithic period. Renfrew’s down-the-line model, which results in a very regular and clustered network, does not permit the circulation of obsidian to regions of the Near East that are further than 300 km from the source zones, as is shown in the archaeological data available. Obsidian exchange is a complex system where multiple factors interact and evolve in time and space. We therefore explore Agent-Based Modelling (ABM) so as to get a better understanding of complex networks. ABM simulations of an exchange network where some agents (villages) are allowed to attain long-distance exchange partners through correlated random walks are carried out. These simulations show what variables (population density, degree of collaboration between villages…) are relevant for the transfer of obsidian over long distances. Moreover, they show that a type of small-world exchange network could explain the breadth of obsidian distribution (up to 800 km from source) during the Near Eastern Neolithic.     

Modelling Cooperation Mechanisms: Some Conceptual Issues

Several evolutionary mechanisms have been proposed to explain how natural selection leads to cooperation between competing individuals. Social dilemmas modelled with the aid of game theory capture the essence of this problem, and computer simulation is usually the technique used to test and formalise those explanatory mechanisms. However, scarce attention has been paid to what the notion of ‘mechanisms’ means and involves in the literature. Also, the key issue about when a computer simulation provides a good explanation tends to be ignored. In this article, we tackle these two drawbacks in the literature by calling attention to the implications of the notion of ‘social mechanism’ along different conceptual dimensions, such as ontological status, regularity, transparency, intelligibility, and reduction. We also claim that computer simulation, and specially agent-based modelling, provides a plausible explanation to social cooperation only if it satisfies some criteria of empirical adequacy instead of just being capable of generating cooperation in a virtual system. Finally, we relate these issues to five evolutionary mechanisms that explain the evolution of cooperation. We review and briefly describe the literature on these mechanisms, and we explain their most important features, how they are to be considered along the conceptual dimensions used to describe the notion of mechanism, what is the empirical and computational evidence to support them, and which are the shortcomings that each of them has as explanatory hypotheses for the evolution of cooperation.     

Correspondencia privada e historia pública: las relaciones intelectuales de Pedro de Castro,Antonio de Herrera y el Inca Garcilaso

Este artículo analiza la correspondencia de Pedro de Castro y Quiñones con Francisco de Castro y Antonio de Herrera sobre las versiones históricas referentes a los hechos de su padre Cristóbal Vaca de Castro frente al gobierno del Perú. Demuestra que, con el propósito de modificar los términos de la crónica de Agustín de Zárate, Pedro de Castro supervisó directamente el texto de las Décadas de Herrera y, a través del jesuita Francisco de Castro, la versión sobre Vaca de Castro que aparece en la segunda parte de los Comentarios reales. La diferente relación del arzobispo con Herrera y Garcilaso —directa en el primer caso y mediata en el segundo— refleja la dispar autoridad de estos dos historiadores. A pesar de que esta intervención de Pedro de Castro se esconde a los ojos del lector, deja una huella tangible en la coincidencia de Herrera y Garcilaso en la escritura de la biografía del gobernador Vaca de Castro frente a la discrepancia de estos mismos cronistas en otros asuntos indianos. El estudio concluye mostrando la articulación que las historias de las Indias tenían en relación con numerosos problemas históricos, teológicos y políticos que se ventilaban entonces.     

Favelas and the divided city: mapping silences and calculations in Rio de Janeiro's journalistic cartography

This article aims to challenge the widespread consensus that Rio de Janeiro is a divided city by deploying two concepts in critical cartography: cartographic silences and cartographic calculations. As a kind of unconquered territory, a terrae incognitae, favelas were silenced on many of Rio de Janerio's maps over the last century. When these places began to be mapped, and converted to terrae cognitae, power relations often become even more apparent because of the intention to make it legible for purposes of intervention. By analyzing maps published in the mainstream Brazilian press throughout the last century, this article explores how national press often portrays Rio de Janeiro as a city divided between formal neighborhoods, where the state apparatus can ensure the rule of law, and favelas, where parallel politics enforce local forms of governance. In order to disseminate this image of the city, maps can play an important role, locating different urban zones and reinforcing old stereotypes. Despite many studies that focused on both material and embodied forms of state presence within favelas, maps can be an important source of information to understand persistant representations of favelas as excluded and divided places.     

Socioeconomic impacts of Russian invasion of Ukraine: A multiregional assessment for Europe

History shows that wars can be enormously disruptive of economic activity, especially international trade, national income, and global economic welfare. This article analyzes the impact on the European regions the Russian invasion of Ukraine using the largest and most updated multiregional input-output model for Europe. Two shocks, trade and inflation, and four alternative scenarios are simulated. The scenarios are considered regarding the number of countries applying a trade embargo, the exemption of oil and gas, and the potential trade diversions with third countries such as China. We obtained a significant fall in GDP (−1.7%), 3.7 m lost jobs and 3% raise over the prewar inflation rate. For trade shock, large indirect effects are obtained, indicating the high relevance of the sectors and countries exposed to the war and the sanctions. The republics of the former Soviet Union, as well as the satellite countries of the former communism, face the harshest adverse impacts. This work shows the importance of breaking Russia's colonial economic ties to the countries in Eastern Europe.     

Ancient Humped Cattle in Africa: A View from the Chad Basin

The origins of ancient and modern African cattle are still a matter of much debate among researchers. Part of the dispute involves the question of the appearance in Africa, from the second millennium BC onwards, of cattle carrying a distinguishing morphological feature present in most of the modern sub-Saharan breeds: The hump. This paper addresses the issue of the origins of the African humped cattle. After reviewing the current hypothesis on their origins, the status and significance of old and new archaeological and osteological evidence from the Chad Basin are presented and critically discussed. Mainly based on the cultural context of the archaeological figurative evidence available in the remaining continent, a case for the foreign ancestry of the ancient African humped cattle is made, and a perspective for future research in the topic is provided.     

Do Lawyers Get More Votes?

ABSTRACT

In many western democracies, law has been the dominant occupational background of politicians. This raises the question whether lawyers get more votes when they run for election compared to non-lawyers. To our knowledge, this question has not been examined empirically over an extended period of time. Our study aims to fill this lacuna. We collected longitudinal data about the careers of all candidates in Canadian federal elections from 1921 to 2015. Our dataset is composed of about 32,000 observations including the occupation and electoral performance of every candidate who ran for office. Our analysis shows that lawyers do get more votes but that their personal electoral boost is very small.     

Implementing Artificial Intelligence in H-BIM Using the J48 Algorithm to Manage Historic Buildings

ABSTRACT

The preservation of the architectural heritage is characterized by the intervention of different technicians, who may disagree on decision-making criteria. In recent years, the H-BIM methodology has emerged to manage these buildings, although the multidisciplinary technical personnel make the decision-taking something of a challenge. In this regard, artificial intelligence may be an opportunity to establish automatic responses, thus optimizing the process. This article proposes a methodology to implement models of classification using the J48 algorithm in a H-BIM model. The case study was focused on a tiles panel from a building which belongs to the Real Alcazar of Seville. First, a model of classification was developed to estimate the degree of intervention with an adequate degree of adjustment. Then, the model was implemented in the H-BIM software by programming using GDL. This methodology automates the decision-making and reduces times of assessments, visualizing and managing the information in the H-BIM model.     

La Publication Scientifique en Ligne Face aux Lacunes du Droit Français

While Internet seemed to be able to open new capacities to scientific publishing, the legislative hardening in favour of protecting the copyright complicated the use of multimedia documents. By excluding the application of any fair use in scientific or pedagogic publishing, the French law appears henceforth as an abnormality in an international context of reproduction of the on-line resources. As a symptom of the failure of the current regulation, wild practices multiply to remedy unsuitable conditions.