Parasitological and serological studies on Amoebiasis and other intestinal parasitic infections in Recife and its suburban area, northeast Brazil

Parasitological examinations were carried out during April to August, 1987, with 187 out-patients of the IMIP hospital, located in the center of Recife City, and 464 inhabitants of several villages around Cabo City, 50 Km southeast of Recife, Pernambuco, Brazil. Approximately 71% of the IMIP patients and 92% of the Cabo inhabitants were infected with at least one species of intestinal parasite. There was minimum difference in the prevalence rate of Trichuris trichiura between two areas, whereas the prevalence rates of Ascaris lumbricoides, hookworms, Strongyloides stercoralis, Schistosoma mansoni and Entamoeba histolytica were higher in the inhabitants of the Cabo City area. Only Giardia lamblia was more prevalent in the out-patients of IMIP hospital. Test tube cultivation revealed that the prevalence rate of Necator americanus in both areas was much higher than that of Ancylostoma duodenale , and also that the prevalence rate of S. stercoralis of the IMIP patients and Cabo inhabitants were 4.5% and 9.6%, respectively. Six hundred and fifteen sera were serologically examined for amoebiasis by the gel diffusion precipitation test (GDP) and enzyme linked immunosorbent assay (ELISA) using the antigen prepared from axenically cultured trophozoite of E. histolytica (strain HM-ITMSS). No positive reaction was observed in all of the sera as examined by GDP, while 32 out of 615 sera were positive on ELISA.

Robustness of corroded reinforced concrete structures. A structural performance approach

Structure and Infrastructure Engineering, 1-17

A framework for robustness assessment in the context of corroded RC structures

Structural robustness is an emergent concept related to the structural response to damage. At the present time, robustness is not well defined and much controversy still remains around this subject. Even if robustness has seen growing interest as a consequence of catastrophic consequences due to extreme events, the fact is that the concept can also be very useful when considered on more probable exposure scenarios such as deterioration, among others. This paper intends to be a contribution to the definition of structural robustness, especially in the analysis of reinforced concrete structures subjected to corrosion. To achieve this, first of all, several proposed robustness definitions and indicators and misunderstood concepts will be analyzed and compared. From this point and regarding a concept that could be applied to most type of structures and dam-age scenarios, a robustness definition is proposed. To illustrate the proposed concept, an example of corroded reinforced concrete structures will be analyzed using nonlinear analysis numerical methods based on a contin-uum strong discontinuities approach and isotropic damage models for concrete. Finally the robustness of the presented example will be assessed.

Labirintos da identidade: de como um fidalgo castelhano-manchego foi chamado a salvar a pátria portuguesa.(da literatura comparada ao fado lusíada)

pp. 187-199

A reliability-based measure of robustness for concrete structures subjected to corrosion

This work is a contribution to the definition and assessment of structural robustness. Special emphasis is given to reliability of reinforced concrete structures under corrosion of longitudinal reinforcement. On this communication several authors’ proposals in order to define and measure structural robustness are analyzed and discussed. The probabilistic based robustness index is defined, considering the reliability index decreasing for all possible damage levels. Damage is considered as the corrosion level of the longitudinal reinforcement in terms of rebar weight loss. Damage produces changes in both cross sectional area of rebar and bond strength. The proposed methodology is illustrated by means of an application example. In order to consider the impact of reinforcement corrosion on failure probability growth, an advanced methodology based on the strong discontinuities approach and an isotropic continuum damage model for concrete is adopted. The methodology consist on a two-step analysis: on the first step an analysis of the cross section is performed in order to capture phenomena such as expansion of the reinforcement due to the corrosion products accumulation and damage and cracking in the reinforcement surrounding concrete; on the second step a 2D deteriorated structural model is built with the results obtained on the first step of the analysis. The referred methodology combined with a Monte Carlo simulation is then used to compute the failure probability and the reliability index of the structure for different corrosion levels. Finally, structural robustness is assessed using the proposed probabilistic index.

Robustness analysis of deteriorating reinforced concrete slabs

Corrosion of reinforcement bars in concrete structures is the most significant deterioration mechanism in these structures. Corrosion is extremely difficult to predict and, consequently, can be regarded as an unpredictable event. Following this, robustness assessment methods can be employed to define the susceptibility of a structure to corrosion. In this work, robustness is measured in terms of the remaining safety of a deteriorated structure. The proposed methodology is illustrated by means of a reinforced concrete (RC) slab subjected to dead and live loads. The performance of the corroded slab is evaluated using non-linear analysis. The reliability index is adopted to assess the safety of the deteriorated structure. To compute the reliability index a strategy combining the First Order Reliability Method (FORM) and the Response Surface Method (RSM) is used.

WIFI indoor positioning for mobile devices, an application for the UJI Smart Campus

Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies.

Educação pela Arte. Uma experiência para dar sentido

Trabalho de Projeto apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Ciências da Educação

Robustness of corroded reinforced concrete structures

Dissertação para obtenção do Grau de Doutor em Engenharia Civil

Engineering modular viral scaffolds for targeted bacterial population editing

Bacteria are central to human health and disease, but existing tools to edit microbial consortia are limited. For example, broad-spectrum antibiotics are unable to precisely manipulate bacterial communities. Bacteriophages can provide highly specific targeting of bacteria, but assembling well-defined phage cocktails solely with natural phages can be a time-, labor- and cost-intensive process. Here, we present a synthetic biology strategy to modulate phage host ranges by engineering phage genomes in Saccharomyces cerevisiae. We used this technology to redirect Escherichia coli phage scaffolds to target pathogenic Yersinia and Klebsiella bacteria, and conversely, Klebsiella phage scaffolds to target E. coli by modular swapping of phage tail components. The synthetic phages achieved efficient killing of their new target bacteria and were used to selectively remove bacteria from multi-species bacterial communities with cocktails based on common viral scaffolds. We envision this approach accelerating phage biology studies and enabling new technologies for bacterial population editing.

Maternidade e parentalidade: reconfigurações e conflitos ideológicos

(Excerto) A construção da maternidade como o acto paradigmático de cuidado adequado deve ser vista como uma construção cultural específica. É comum conceber o cuidado como uma relação entre duas pessoas e especialmente como uma relação entre mãe e filho. Como observa Joan Tronto, uma tal compreensão conduziu frequentemente à idealização deste duo que se converteu numa espécie de casal romântico no discurso contemporâneo ocidental sobre a maternidade (Tronto, 1993, pp. 103, 109-110). A ênfase ideológica na díade mãe/filho subsiste, não obstante revestir-se de novos cambiantes e ser paralela à valorização da paternidade reflectida numa diversidade de estudos (e.g. Monteiro & Domingos, 2013; Torres, 2002) e nas práticas sociais.

COST Action TU1406: eBook of the 1st Workshop Meeting

COST Action TU1406 aims to address the European economic and societal needs by standardizing the condition assessment and maintenance level of roadway bridges. Currently, bridge quality control plans vary from country to country and, in some cases, within the same country. This therefore urges the establishment of a European guideline to surpass the lack of a standard methodology to assess bridge condition and to define quality control plans for roadway bridges. Such a guideline will comprise specific recommendations for assessing performance indicators as well as for the definition of performance goals, bringing together different stakeholders (e.g. universities, institutes, operators, consultants and owners) from various scientific disciplines (e.g. on-site testing, visual inspection, structural engineering, sustainability, etc.) in order to establish a common transnational language. COST Action TU1406 Workshops aim to facilitate the exchange of ideas and experiences between active researchers and practitioners as well as to stimulate discussions on new and emerging issues in line with the conference topics. This first Workshop essentially focuses on WG1 issues, namely, intends to address performance indicators, how these are assessed (e.g. visual inspection, nondestructive tests and monitoring systems), with what frequency and what values are generally obtained. The main outcomes, given in this eBook, were really important, not only for WG1 developments, but also for all the other WGs and for the Action itself.

Régimen laboral de los docentes de universidades privadas argentinas. Bases y lineamientos para un modelo de regulación

Consideramos que existe una seria desarticulación y dispersión del sistema normativo que rige la relación laboral docente universitaria privada, principalmente por parte de los operadores jurídicos- empleadores y trabajadores docentes-. También percibimos que la reconstrucción que se hace para solucionar problemas prácticos en esta área del Derecho no exhibe respuestas satisfactorias a la especificidad de la relación laboral del docente universitario privado. En efecto, la docencia universitaria privada presenta nítidas diferencias jurídicas y fácticas con la docencia privada de los otros niveles (por lo cual aquélla no se halla regida por la ley 13.047 que rige a los docentes de los otros niveles). Pero también se diferencia con otras actividades laborales de distintas condiciones, influidas o no por el taylorismo-fordismo o toyotismo, y a la que la Ley de Contrato de Trabajo, que mayoritariamente se estima aplicable, no aprehende con precisión. También se diferencia en cuanto al régimen jurídico aplicable con la docencia universitaria estatal y quizás también en algunos elementos fácticos de la prestación laboral. Tales aspectos deficitarios pueden mejorar si se esclarece y reconstruye de modo integral el régimen jurídico laboral que los regula, según la legislación aplicable y las enseñanzas de la doctrina y la jurisprudencia al respecto. Procuraremos verificar cuáles son los principios y las normas que deberían regir la relación laboral docente universitaria privada argentina y su efectivo conocimiento y aplicación por parte de los inmediatos operadores jurídicos- empleadores y trabajadores docentes-. Si se detectan inadecuaciones normativas a la realidad que se trata y a la justicia social, lo que es altamente probable, se propiciará el dictado de normas de diferentes niveles de fuentes normativas para corregirlas.