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The aim of the investigation is to identify and interrelate particular parameters that influence the magnitude of noise levels to which rock drillers are subjected. The percussive rock drill is known to be an excessively noisy machine. Currently, exhaust mufflers and other silencing devices are being developed but as yet acceptable noise levels have not been established. The definition of acceptable sound power levels for drills must recognize that the sound levels to which the drill operator is exposed are modified by the acoustic properties of the working environment. For the initial phase of the investigation a representative rock drill was selected as a noise source. Comparative sound levels generated by this machine were measured in a free field environment and in typical underground working places. Increases in the sound pressure levels in each octave band from 63 to 16,000 hertz were observed when the drill was operated in both stopes and drifts. For the subsequent phase of the investigation, studies were conducted on an assortment of commercially available rock drills. The changes in measured sound levels have been related to: the acoustic properties of the working place, the drill position relative to the walls, the length of drill steel exposed from the hole, and the drill air supply pressure. Based on the measurements taken throughout the investigation, sound pressure level correction factors are proposed. By applying these factors to sound levels generated under free field conditions, predictions of rock drill sound pressure levels present in underground working places can be made. In addition, when studies of rock drill noise levels in various operating configurations are being conducted, use of the factors permits reduction of observed sound level measurements to a common datum. / Applied Science, Faculty of / Mining Engineering, Keevil Institute of / Graduate

The research for this thesis was carried out to investigate the effects of anisotropy on stress and strain measurements made by the Leeman "doorstopper" technique. The stress field in rock is influenced by many different sources. These complicate the methods for obtaining a stress tensor which is a representive model of the in-situ stress condition. Research has been carried out to determine stress concentrations for the Leeman doorstopper technique in isotropic ground, but previously, no values were known to exist for anisotropic conditions. A three-dimensional finite-element computer model was used to investigate the effect of anisotropy on stress and strain concentration factors. Displacement data and strain concentration factors obtained from this analysis, although not quantitatively accurate, showed that the doorstopper technique can indicate erroneous stress levels in anisotropic ground unless the appropriate corrections can be made. / Applied Science, Faculty of / Mining Engineering, Keevil Institute of / Graduate

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Jurídicas, Programa de Pós-Graduação em Direito, Florianópolis, 2016 / Made available in DSpace on 2016-09-20T04:22:06Z (GMT). No. of bitstreams: 1 340436.pdf: 3510940 bytes, checksum: 7da0e0658480797938888816fd2f042a (MD5) Previous issue date: 2016 / O presente trabalho procura identificar possíveis representações de Direito no rock de Raul Seixas. A partir da perspectiva dos estudos culturais, especialmente do autor Douglas Kellner, será demonstrado como e porque o rock pode ser considerado valiosa fonte de pesquisa. Na sequência, será demonstrado de que forma os juristas tem trabalhado com as temáticas interdisciplinares como direito e música e direito e rock, no intuito de identificar possíveis falhas. Assim, utilizando as orientações metodológicas de Douglas Kellner e Marcos Napolitano, será realizada uma análise de 10 canções de Raul Seixas, produzidas entre os anos 1974 e 1988, com o objetivo de nelas identificar possíveis representações de Direito. <br> / Abstract : This thesis seeks to identify some possible representations of Law in the Raul Seixas rock. From the perspective of cultural studies, especially the Douglas Kellner author, we will demonstrate how and why the rock can be considered a valuable source of research. Following, we will demonstrate how the lawyers have been working with interdisciplinary issues such as law and music and law and rock, in order to identify possible failures. Thus, using the methodological guidelines of Douglas Kellner and Marcos Napolitano, we will be analyze 10 songs from Raul Seixas, produced between the years of 1974 and 1988 in order to identify in them possible representations of law.

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Memoria para optar al título de periodista / Esta memoria busca poner a prueba la capacidad del postulante para realizar entrevistas en profundidad a los protagonistas del período de gestación del rock nacional, de las cuales obtener datos, anécdotas y testimonios que den cuenta del modo en el cual se desarrolló esta expresión musical en esos años. También, la revisión del material periodístico de la época (básicamente revistas) servirá para dar cuenta del rol que jugaron los medios de comunicación directamente ligados a la música juvenil en la difusión o censura de esta expresión rockera. Recopilar una importante cantidad de información para recrear en el texto el ambiente social, económico, circunstancial y artístico en el cual se gestó un movimiento de rock criollo a partir de 1966. Entregar información sobre los centros neurálgicos de la escena, el tipo de público, el carácter de estos músicos y la reacción de su entorno. Descubrir la real dimensión de su alcance como movimiento generacional en su tiempo y revisar la discografía de la época para explicar a quienes no tienen acceso a estos discos de qué se trataban. Debido a que esta memoria de título pretende tener un carácter testimonial para reafirmar los acontecimientos y, además, obtener una narración más ágil para el lector.

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