Sendero: An Extended, Agent-Based Implementation of Kauffman's NKCS Model

The idea of agents exploring a fitness landscape in which they seek to move from 'fitness valleys' to higher 'fitness peaks' has been presented by Kauffman in the NK and NKCS models. The NK model addresses single species while the NKCS extension illustrates coevolving species on coupled fitness landscapes. We describe an agent-based simulation (Sendero), built in Repast, of the NK and NKCS models. The results from Sendero are validated against Kauffman's findings for the NK and NKCS models. We also describe extensions to the basic model, including population dynamics and communication networks for NK, and directed graphs and variable change rates for NKCS. The Sendero software is available as open source under the BSD licence and is thus available for download and extension by the research community.Coevolution, Agent-Based Modelling, NK, NKCS, Fitness Landscape

The Fall of Sendero Luminoso

The Fall of Sendero Luminoso evaluates the rise and decline of the Shining Path movement, or Sendero Luminoso, in Peru. The social insurrection began in 1980 and seeks to establish a communist state in Peru through the use of guerrilla warfare. The 1992 capture of Sendero\u27s leader, Abimael Guzman, significantly weakened the organization and its influence in Peruvian society has diminished. My thesis attempts to postulate the reasons for the collapse of the organization with a particular focus on how the practices and policies of Sendero inhibited the revolution from establishing a deep social foundation. I argue that Sendero\u27s use of guerrilla warfare against civilians, failure to represent the social needs of the populace, and refusal to unite with other leftist parties in Peru hampered its ability to gain mass appeal and respond to the harsh military counterinsurgency by the government. Primary issues covered in the thesis include social justice, Peruvian politics, and revolutionary theory

Sendero Luminoso and Peruvian counterinsurgency

Sendero Luminoso first appeared in Peru in May 1980 by burning several ballot boxes and hanging dogs from streetlights. This unusual event signaled the beginning of one of the most violent insurgencies in the Western hemisphere. Abimael Guzmán, the founder of Sendero Luminoso, set out to utterly destroy Peruvian society in order to replace it with his vision of a utopian communist society by creating a peasant uprising starting in the Andean highlands and spreading throughout Peru, eventually surrounding the capital, Lima. The government of Peru virtually ignored Sendero Luminoso for two years, which allowed the group to establish strong base areas in and around the department of Ayacucho. When the government finally reacted, it was forced to declare a state of emergency in the south central highlands and send in the military to regain control. Through successive administrations over the next decade, Peru was engulfed in violence and destruction, human rights abuses, corruption, and economic catastrophe. Sendero Luminoso demonstrated an uncanny ability to avoid the military’s concentrated efforts while expanding into new regions of Peru. The group also benefited from the drug trade to finance the insurgency by providing protection to coca farmers and narcotraffickers in the Upper Huallaga Valley. Only after Guzmán’s capture in 1992 did the government witness visible progress in the fight against the insurgents. Sendero Luminoso rapidly declined without Guzmán’s leadership and the remnants withdrew to the Upper Huallaga Valley. Yet many of the conditions that led to the creation of Sendero Luminoso still plague the country, including corruption in the government, poverty, and a weak economy. The missing catalyst is another leader like Abimael Guzmán

Peruvian cinema, national identity and political violence 1988-2004

The role of national cinema in shaping, reflecting and contesting a complex national identity that is the site of conflict and struggle is the central interest of this study of contemporary Peruvian cinema, 1988-2004. This project examines the relationship between cinema, state and identity in Peru, with a specific focus on the representation of the political violence between the state and Sendero Luminoso (Shining Path) that began in 1980. It looks in particular at portrayals of important events, characters and consequences of the bloody conflict that for a time threatened to destabilize the nation entirely. It considers these representations in the context of a time of great change for Peruvian society and of transition for Peruvian national cinema, and addresses the relationship between developments in film policy and the formation of Peruvian national identity in cinema. As such, it draws on debates about the nature and function of national cinemas, as well as on discussions between artists, cultural theorists and sociologists about the evolution of peruanidad since the declaration of independence from Spain in the early nineteenth century. Once the main elements of the cinematic and social crises have been explored and established in Chapters Two and Three, the remainder of the project consists of three sets of chronologically ordered analyses of individual films that somehow defied the national cinema crisis, and that provoked debate on both the conflict itself, and on broader questions pertaining to the relationship between national identity and violence. The conclusion considers these films as an interlinked body of cinematic works that share similar themes and concerns. It summarises the issues they tackle, the ideological and formal approaches they take to those issues, the potential social and cultural impact, and their contribution to the crystallization of a Peruvian national identity at the start of the twenty-first century

Liberal democracy as the result of an "aborted" communist revolution

We propose a model of the transition from a ”big man” authoritarian regime to either a liberal democracy or a communist regime. An underground organization votes on whether to summon a mass event. If it is summoned, the organization members decide whether to put effort into the event. Higher effort makes regime change more likely, but it is individually risky. This creates the possibility, in principle, of high and low effort equilibria. But we show, using weak dominance arguments, that only the high effort equilibrium is ”credible.” Thus, internal party democracy is shown to be an efficiency enhancing element for political transitions. We extend the model to show that other internal organization aspects are key for the existence and welfare properties of this equilibrium. Finally we also show when is the process likely to end up in either democracy (and its ”quality”) or a full communist regime

A checklist of the hepatics and anthocerotes of Panamá

A brief account of the geography and floristic regions of Panamá is complemented with an historical account of the liverwort studies of this country. This is followed by an annotated checklist of 289 taxa, including 93 new for Panamá. Among these are four hornwort taxa that represent the first anthocerotes reported. Each checklist entry comprises proper taxon citation, collection data and/or bibliographic references.Una revisión de la geografía y regiones florísticas de Panamá es complementada con una nota histórica de los estudios sobre hepáticas de este país. Esto es seguido por una lista anotada de 289 taxa, incluyendo 93 que son nuevos para Panamá. Entre éstos se encuentran cuatro antocerotes que representan las primeras comunicaciones en esta División. Cada taxon ingresado contiene la citación apropiada, datos de colecta y/o referencias bibliográficas

Toward Successful COIN: Shining Path’s Decline

The rapid decline of the Peruvian left-wing insurgent organization Sendero Luminoso was not only the result of the arrest of its leader. An analysis of the precipitous weakening of the organization using two social movement theories finds other factors were involved in the demise of the organization as well. These factors—participatory politics, support for the military among the rural population, and alienation of the population by Sendero Luminoso—provide insights to effective counterinsurgency tactics