On The Corporeal Exchange: Thai Boxing's Sacrificial Movement

This dissertation is an ethnographic study of Thai boxing (muay Thai) understood as sacrificial exchange, exploring the practice of this martial art in the context of contemporary Thai society. Drawing on two years of apprenticeship and participation research in Northeast Thailand and Bangkok, I consider the fighters’ integration in broader patterns of seasonal labor migration as they move between rural, regional tournaments and Bangkok stadiums. Focusing on the training of one particular boxer, I investigate interactions between trainers, managers, family, patrons and ancestral spirits. The boxers’ embodied actions as they unfold in time represent the sovereign relationship between living and dead, nature and culture, performatively establishing the boundaries between growth and decay. As the living move through a world of animate social relations, accruing debt, the boxer’s embodied patterns of repetition and exhaustion in training, and of destructive action in combat, create a possibility for shifting this balance, accruing merit for those otherwise occupied in handling materials which support the powerful, and transforming the established hierarchical order of everyday life. Against the background of the impermanent, closed, linear, cyclical or progressive temporalities of monasteries, factories, the military and the monarchy, the temporality of the ring remains open, giving fighters the elbow-room to performatively engage crucial symbols of life and death, male and female, human and animal, affording otherwise politically disempowered Northeastern Thai families the opportunity to create meaning and possibility in their lives. Acting as both victim and executioner, fighters accrue credit for the assembled audience, reinvesting each tier of the community with a degree of responsibility for life. I argue that these practices occur within a ‘deathworld’, in which the heightened attentiveness to the limited possibilities for action reaffirm the local position of the individual within the collective. With embodied motion that cuts across local categories of stillness and mobility, the living and the dead, with ever-greater stamina, Thai boxers become increasingly valuable and credit-able, paying the debts, material and spiritual, that their assembled supporters have incurred as they live their kinetically excessive lives, allowing men throughout the community to remain accountable to Kings, Buddha, ancestors, factories and patrons.Doctor of Philosoph

Structural and computational aspects of simple and influence games

Simple games are a fundamental class of cooperative games. They have a huge relevance in several areas of computer science, social sciences and discrete applied mathematics. The algorithmic and computational complexity aspects of simple games have been gaining notoriety in the recent years. In this thesis we review different computational problems related to properties, parameters, and solution concepts of simple games. We consider different forms of representation of simple games, regular games and weighted games, and we analyze the computational complexity required to transform a game from one representation to another. We also analyze the complexity of several open problems under different forms of representation. In this scenario, we prove that the problem of deciding whether a simple game in minimal winning form is decisive (a problem that is associated to the duality problem of hypergraphs and monotone Boolean functions) can be solved in quasi-polynomial time, and that this problem can be polynomially reduced to the same problem but restricted to regular games in shift-minimal winning form. We also prove that the problem of deciding wheter a regular game is strong in shift-minimal winning form is coNP-complete. Further, for the width, one of the parameters of simple games, we prove that for simple games in minimal winning form it can be computed in polynomial time. Regardless of the form of representation, we also analyze counting and enumeration problems for several subfamilies of these games. We also introduce influence games, which are a new approach to study simple games based on a model of spread of influence in a social network, where influence spreads according to the linear threshold model. We show that influence games capture the whole class of simple games. Moreover, we study for influence games the complexity of the problems related to parameters, properties and solution concepts considered for simple games. We consider extremal cases with respect to demand of influence, and we show that, for these subfamilies, several problems become polynomial. We finish with some applications inspired on influence games. The first set of results concerns to the definition of collective choice models. For mediation systems, several of the problems of properties mentioned above are polynomial-time solvable. For influence systems, we prove that computing the satisfaction (a measure equivalent to the Rae index and similar to the Banzhaf value) is hard unless we consider some restrictions in the model. For OLFM systems, a generalization of OLF systems (van den Brink et al. 2011, 2012) we provide an axiomatization of satisfaction. The second set of results concerns to social network analysis. We define new centrality measures of social networks that we compare on real networks with some classical centrality measures.Los juegos simples son una clase fundamental de juegos cooperativos, que tiene una enorme relevancia en diversas áreas de ciencias de la computación, ciencias sociales y matemáticas discretas aplicadas. En los últimos años, los distintos aspectos algorítmicos y de complejidad computacional de los juegos simples ha ido ganando notoriedad. En esta tesis revisamos los distintos problemas computacionales relacionados con propiedades, parámetros y conceptos de solución de juegos simples. Primero consideramos distintas formas de representación de juegos simples, juegos regulares y juegos de mayoría ponderada, y estudiamos la complejidad computacional requerida para transformar un juego desde una representación a otra. También analizamos la complejidad de varios problemas abiertos bajo diferentes formas de representación. En este sentido, demostramos que el problema de decidir si un juego simple en forma ganadora minimal es decisivo (un problema asociado al problema de dualidad de hipergrafos y funciones booleanas monótonas) puede resolverse en tiempo cuasi-polinomial, y que este problema puede reducirse polinomialmente al mismo problema pero restringido a juegos regulares en forma ganadora shift-minimal. También demostramos que el problema de decidir si un juego regular en forma ganadora shift-minimal es fuerte (strong) es coNP-completo. Adicionalmente, para juegos simples en forma ganadora minimal demostramos que el parámetro de anchura (width) puede computarse en tiempo polinomial. Independientemente de la forma de representación, también estudiamos problemas de enumeración y conteo para varias subfamilias de juegos simples. Luego introducimos los juegos de influencia, un nuevo enfoque para estudiar juegos simples basado en un modelo de dispersión de influencia en redes sociales, donde la influencia se dispersa de acuerdo con el modelo de umbral lineal (linear threshold model). Demostramos que los juegos de influencia abarcan la totalidad de la clase de los juegos simples. Para estos juegos también estudiamos la complejidad de los problemas relacionados con parámetros, propiedades y conceptos de solución considerados para los juegos simples. Además consideramos casos extremos con respecto a la demanda de influencia, y probamos que para ciertas subfamilias, varios de estos problemas se vuelven polinomiales. Finalmente estudiamos algunas aplicaciones inspiradas en los juegos de influencia. El primer conjunto de estos resultados tiene que ver con la definición de modelos de decisión colectiva. Para sistemas de mediación, varios de los problemas de propiedades mencionados anteriormente son polinomialmente resolubles. Para los sistemas de influencia, demostramos que computar la satisfacción (una medida equivalente al índice de Rae y similar al valor de Banzhaf) es difícil a menos que consideremos algunas restricciones en el modelo. Para los sistemas OLFM, una generalización de los sistemas OLF (van den Brink et al. 2011, 2012) proporcionamos una axiomatización para la medida de satisfacción. El segundo conjunto de resultados se refiere al análisis de redes sociales, y en particular con la definición de nuevas medidas de centralidad de redes sociales, que comparamos en redes reales con otras medidas de centralidad clásica

Committing to the Waves: Emerson\u27s Moving Assignments

Committing to the Waves: Emerson\u27s Moving Assignments reads Ralph Waldo Emerson as a writer of assignments for living and working whose senses can be taken up across a wide array of creative and exploratory fields. Shifting between an interdisciplinary array of contexts ranging from philosophy and poetics to dance, performance, and somatic movement experiments, I join the practical sense of creative inquiry embodied in these fields to the abstract images of Emerson\u27s assignments. I argue that Emerson\u27s descriptions of intelligence and power, and so his approaches to navigating skepticism and loss, as well as the non-possessive sense of what self actually means to this thinker of self-reliance can be illuminated by reading from the non-dualist perspective that embodied inquiry offers. The dissertation also enacts the self-reliance that Emerson calls for by taking up my response to Emerson through my sense of his assignments. The first half of this study uses this embodied work as a resource for reading Emerson, situating his sense in relation to extra-literary and extra-philosophical research. The second half of the dissertation makes a pivot, taking Emerson as a resource for performance assignments, first in the form of a chapter written with poetic constraints, which approaches the question of how philosophical commitments might animate theater and actual performance, and finally by following Emerson\u27s instruction to the scholar to dive into her privatest presentiments to find where that privacy meets a public intelligence and intelligibility. The dissertation concludes with the documentation of Another Tree Dance, an original performance generated from that Emersonian private dive

Evolution of symbolic communication : an embodied perspective

This thesis investigates the emergence in human evolution of communication through symbols, or conventional, arbitrary signs. Previous work has argued that symbolic speech was preceded by communication through nonarbitrary signs, but how vocal symbolic communication arose out of this has not been extensively studied. Thus far, past research has emphasized the advantages of vocal symbols and pointed to communicative and evolutionary pressures that would have spurred their development. Based on semiotic principles, I examine emergence in terms of two factors underlying symbols: interpretation and conventionalization. I address the question with a consideration of embodied human experience – that is, accounting for the particular features that characterize human communication. This involves simultaneous expression through vocal and gestural modalities, each of which has distinct semiotic properties and serves distinct functions in language today. I examine research on emerging sign systems together with research on properties of human communication to address the question of symbol emergence in terms of the specific context of human evolution. I argue that, instead of in response to pressures for improved communication, symbolic vocalizations could have emerged through blind cultural processes out of the conditions of multimodal nonarbitrary communication in place prior to modern language. Vocalizations would have been interpreted as arbitrary by virtue of their semiotic profile relative to that of gesture, and arbitrary vocalizations could have become conventionalized via the communicative support of nonarbitrary gestures. This scenario avoids appealing to improbable evolutionary and psychological processes and provides a comprehensive and evolutionarily sound explanation for symbol emergence. I present experiments that test hypotheses stemming from this claim. I show that novel arbitrary vocal forms are interpreted and adopted as symbols even when these are uninformative and gesture is the primary mode of communication. I also present computational models that simulate multi-channel, heterosemiotic communication like that of arbitrary speech and nonarbitrary gesture. These demonstrate that information like that provided by gesture can enable the conventionalization of symbols across a population. The results from experiments and simulations together support the claim that symbolic communication could arise naturally from multimodal nonarbitrary communication, offering an explanation for symbol emergence more consistent with evolutionary principles than existing proposals