Thesis (M.A.)--Catholic Theological Union at Chicago, 1996. / Vita. Includes bibliographical references (leaves 80-85).

Source: Masters Abstracts International, Volume: 46-04, page: 2093. Advisers: Xianglin L. Du; Karen H. Lu. Includes bibliographical references.

Thesis (doctoral)--Katholieke Universiteit te Nijmegen.

Diss. (sammanfattning) Stockholm : Karolinska institutet, 2010.

Thesis (Ph.D.)--University of Wollongong, 2009. / Typescript. Includes bibliographical references: leaf 308-322.

Diss. (sammanfattning) Uppsala : Uppsala universitet, 2009.

Thesis (M.A.)--Catholic Theological Union at Chicago, 1996. / Vita. Includes bibliographical references (leaves 80-85).

Made available in DSpace on 2014-06-11T19:30:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2001Bitstream added on 2014-06-13T18:40:40Z : No. of bitstreams: 1 abud_tmv_dr_botfm.pdf: 265309 bytes, checksum: e3b637e472f866c08307b35491fa04cb (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Justificativa: a hiperinsuflação do balonete do tubo traqueal, causada pela rápida difusão do óxido nitroso (N2O), pode determinar lesões traqueais. Objetivos: comparar as pressões de balonetes de tubos traqueais, contendo ou não válvula reguladora de pressão, durante anestesia com N2O e estudar as eventuais lesões da mucosa do segmento traqueal em contato com o balonete do tubo traqueal. Método: dezesseis cães foram submetidos à anestesia venosa com pentobarbital sódico e anestesia inalatória com N2O (1,5 L.min-1) e O2 (1,0 L.min -1). Os cães foram distribuídos aleatoriamente em dois grupos de acordo com o tubo traqueal utilizado: G1 (n=8) tubo traqueal convencional com balonete de baixa pressão (Portex Blue-Line, Inglaterra); G2 (n=8) tubo traqueal dotado de válvula reguladora de pressão de Lanz (Mallincrodt, EUA). Em ambos os grupos, a insuflação do balonete foi feita com ar até a pressão de 30 cm H2O. A medida da pressão do balonete foi realizada através de manômetro (Mallincrodt, EUA), antes e após 60, 120 e 180 minutos do início da... / Background: High endotracheal tube intracuff pressure caused by fast diffusion of nitrous oxide (N2O) may cause mucosal tracheal lesions. Objectives: We have studied the effects of endotracheal tubes intracuff pressures with or without pressure regulating valve on tracheal mucosa during anesthesia with N2O. Methods: Sixteen dogs were submitted to intravenous anesthesia with pentobarbital and inhalational anesthesia with N2O (1.5 L.min-¹) and O2 (1.0 L.min-¹). The dogs were randomly allocated to two groups according to the endotracheal tube: G1 (n=8) conventional endotracheal tube with low-pressure cuff (Portex Blue-line, England); G2 (n=8) endotracheal tube with pressure regulating valve of Lanz from Mallincrodt (USA). In both groups the cuff insufflation was done with air to adjust cuff pressure to 30 cm H2O. Intracuff pressure was measured using a manometer at zero (control) and 60, 120 and 180 minutes after inhation of the N2O. The animals were sacrificed and biopsy specimens from areas of the trachea in contact with the endotracheal cuff were... (Complete abstract, click electronic address below)

Orientador: Diana Rodrigues de Pina / Resumo: A tomografia computadorizada (TC) é amplamente utilizada no diagnóstico e estadiamento de patologias da região de abdômen-pelve devido a sua alta sensibilidade e especificidade. A possibilidade de adquirir maior número de imagens em menor tempo e a maior disponibilidade de equipamentos levaram a um aumento significativo dos exames de TC e consequente aumento das doses efetivas globais fornecidas por esta modalidade. Desta forma, foram desenvolvidas ferramentas que buscam reduzir as doses de radiação dos exames sem perda da qualidade da imagem. Uma destas ferramentas é a modulação automática da corrente do tubo (automatic tube current modulation – ATCM), que permite a obtenção de exames que concordam com o princípio ALARA (as low as reasonably achievable). O objetivo deste estudo foi avaliar a qualidade da imagem e as doses de radiação de diferentes protocolos de TC de abdômen-pelve com a ferramenta ATCM. Foram avaliados cinco protocolos de TC de abdômen-pelve com a ferramenta ATCM em dois tomógrafos distintos, um 16-canais e um 64 canais. Foi utilizado um fantoma antropomórfico para avaliações dosimétricas e um fantoma analítico para avaliações objetivas de qualidade da imagem. Para a análise subjetiva da qualidade da imagem, foram utilizados 15 exames retrospectivos de pacientes submetidos a TC de abdômen-pelve. Estes exames foram avaliados por um radiologista com experiência na área de tomografia de abdômen. As três análises forneceram informações que possibilitaram a escol... (Resumo completo, clicar acesso eletrônico abaixo) / Mestre

abstract: Trenchless technologies have emerged as a viable alternative to traditional open trench methods for installing underground pipelines and conduits. Pilot Tube Microtunneling, also referred to as the pilot tube system of microtunneling, guided auger boring, or guided boring method, is a recent addition to the family of trenchless installation methods. Pilot tube microtunneling originated in Japan and Europe, and was introduced to the United States in the year 1995 (Boschert 2007). Since then this methodology has seen increased utilization across North America particularity in municipal markets for the installation of gravity sewers. The primary reason contributing to the growth of pilot tube microtunneling is the technology's capability of installing pipes at high precision in terms of line and grade, in a wide range of ground conditions using relatively inexpensive equipment. The means and methods, applicability, capabilities and limitations of pilot tube microtunneling are well documented in published literature through many project specific case studies. However, there is little information on the macroscopic level regarding the technology and industry as a whole. With the increasing popularity of pilot tube microtunneling, there is an emerging need to address the above issues. This research effort surveyed 22 pilot tube microtunneling contractors across North America to determine the current industry state of practice with the technology. The survey examined various topics including contractor profile and experience; equipment, methods, and pipe materials utilized; and issues pertaining to project planning and construction risks associated with the pilot tube method. The findings of this research are based on a total of 450 projects completed with pilot tube microtunneling between 2006 and 2010. The respondents were diverse in terms of their experience with PTMT, ranging from two to 11 years. A majority of the respondents have traditionally provided services with other trenchless technologies. As revealed by the survey responses, PTMT projects grew by 110% between the years 2006 and 2010. It was found that almost 72% of the 450 PTMT projects completed between 2006 and 2010 by the respondents were for sanitary sewers. Installation in cobbles and boulders was rated as the highest risk by the contractors. / Dissertation/Thesis / M.S. Construction 2011