Building replicated database systems using distributed shared memory

Current trends in main memory capacity and cost indicate that in a few years most performance-critical applications will have all (or most of) their data stored in the main mem- ory of the nodes of a small-size cluster. A few recent research papers have pointed this out and proposed architectures tak- ing advantage of clustered nvironments aggregating power- ful processors equipped with large main memories. This position paper proposes yet another approach, which builds on Distributed Shared Memory systems (DSMs) introduced in the early 80’s. We introduce the idea of the dsmDB, dis- cuss how its architecture could be organized, and elaborate on some of its algorithms. We conclude the paper with a discussion of some of its advantages and drawbacks.Este artigo apresenta uma abordagem para a construção de sistemas de base de dados replicados utilizando memória compartilhada distribuída. A arquitetura dsmDB, a qual implementa tal proposta, é apresentada. Vantagens e desvantagens da abordagem são elencadas e discutidas

Evaluation of the adsorption process of remazol black b dye in liquid effluents by green coconut mesocarp

The textile industry is economically important for the development of Brazil. However, the generated effluents from this activity present a complex molecular structure that gives a recalcitrant characteristic in its residuary waters. Due to this reality, it is necessary to develop viable technologies that remove those compounds, which are mostly dyes. In this study, the green coconut mesocarp was used to remove Remazol Black B dye of an aqueous solution using the adsorption technique. To perform the experiments, the green coconut mesocarp was dried at 60ºC, ground in a grinding mill, sifted, washed with distilled water and immersed in albumin for 24 hours. The process of adsorption was optimized in a batch mode, containing 0.5 g of adsorbent and 25 mL of synthetic solution of 10 mg L -1, at 30ºC, pH 4.0, stirring speed of 700 rpm, and granulometry G ￡ 0.149 mm. Afterwards, the influence of the pH of the solution, adsorbent granulometry and stirring speed were evaluated by means of factorial planning. Experiments of equilibrium and kinetics of adsorption were conducted in Erlenmeyer. Results indicated that among the main effects, the pH and the adsorbent granulometry significantly influenced the process of adsorption. Besides, the adsorption equilibrium was reached in 60 minutes of contact. The Langmuir model was adjusted to experimental results (R 2=0.9953) being obtained a maximum capacity of adsorptionof 2.93 mgg-1 and equilibrium constant of 0.26 Lmg-1. With the obtained results it could be concluded that the green coconut mesocarp could be a viable alternative for the treatment of textile effluents

Prevalence between methods of diagnosis in abdominal aortic aneurysms

Identificar com qual freqüência diferentes métodos são responsáveis pelo diagnóstico inicial dos aneurismas de aorta abdominal (AAA) operados em nossa instituição no período de 2000 a 2002. MATERIAIS E MÉTODOS: Foram estudados retrospectivamente, através da análise de prontuários, 200 pacientes consecutivamente submetidos à correção de AAA no período de dois anos. RESULTADOS: Oitenta e seis(43%) pacientes tiveram o AAA clinicamente detectados, 113 (56,5%) através de exames de imagem e um (0,5%) durante laparotomia. CONCLUSÃO: Exames complementares paradiagnósticos de outras doenças são mais freqüentemente responsáveis pelo diagnósticode AAA.Objetivo: To identify the initial diagnostic method of abdominal aortic aneurysms (AAA) in patients submitted to surgeries from 2000 to 2002. MATERIALS AND METHODS: There were analyzed 200 consecutive patients with an AAA submitted to resection and revascularization. RESULTS: Eight-six (43%) were diagnosed clinically, 113 (56,5%)during an imaging investigation and 1 (0,5%) at laparotomy. CONCLUSIONS: The imaging investigation was the most frequent method of diagnosis of AAA

O BNDES e a questão energética e logística da Região Amazônica

Bibliografia: p. 134-135O presente trabalho tem por objetivo refletir acerca da infraestrutura da Região Norte, especificamente dos segmentos de logística e energia elétrica. Para efetuar tal análise, o artigo traça o panorama atual da infraestrutura regional e da atuação do BNDES, incluindo o apoio a projetos estruturantes e seus entornos. Com esse cenário,o trabalho apresenta algumas considerações para aprimorar a infraestrutura da Região Norte que possam servir de inspiração para a atuação do BNDES, de modo a promover maior integração da região e ampliar o desenvolvimento econômico regional.This study is aimed at reflecting on infrastructure in the North Region, specifically on the logistics and electric energy segments. To carry out this analysis, the article outlines the current panorama of regional infrastructure and the BNDES’ efforts, including support for both structuring projects and the surrounding areas. Within this scenario, the paper presents some considerations aimed at improving infrastructure in the North Region that may help inspire the BNDES’ efforts, so as to foster better integration within the region and expand regional economic development

A general purpose cave-like system for visualization of animated and 4D cad modeling

In the last decade, virtual reality (VR) systems have been used to enhance the visualization of CAD projects. The immersive VR techniques allow to the designer interacting and modeling in a more intuitive and efficient way. Current 4D and animated simulation CAD tools are a new challenge for immersive visualization. In this paper we propose a general purpose cave-like system that enables interactive visualization of 4D and animated CAD models. In an automated way, the system is able to treat static and dynamic 3D environments, allowing to share the experience of navigation in the scene among the users, even geographically distributed. The collaborative immersive multiprojection visualization approach has basically four modules for modeling, converting, visualizing and interacting. Besides the system had be designed and implemented for visualization of CAD models, it can be used for general purposes thanks to the use of a XML-based format on the visualization module. The system proposed is validated through a case-study using dynamic 3D models created on digital manufacturing softwares of Shipbuilding and Offshore Industries

Latin American anaphylaxis registry

Background: Recent data about clinical features, triggers and management of anaphylaxis in Latin America is lacking. Objective: To provide updated and extended data on anaphylaxis in this region. Method: An online questionnaire was used, with 67 allergy units involved from 12 Latin-American countries and Spain. Among data recorded, demographic information, clinical features, severity, triggering agents, and treatment were received. Results: Eight hundred and seventeen anaphylactic reactions were recorded. No difference in severity, regardless of pre-existing allergy or asthma history was found. Drug induced anaphylaxis (DIA) was most frequent (40.6%), followed by food induced anaphylaxis (FIA) (32.9%) and venom induced anaphylaxis (VIA) (12%). FIA and VIA were more common in children-adolescents. Non-steroidal anti-inflammatory drugs (NSAIDs) and beta-lactam antibiotics (BLA) were the most frequent drugs involved. Milk (61.1% of FIA) and egg (15.4% of FIA) in children, and shellfish (25.5% of FIA), fresh fruits (14.2% of FIA), and fish (11.3% of FIA) in adults were the most common FIA triggers. Fire ants were the most frequent insect triggers, and they induced more severe reactions than triggers of FIA and DIA (p < 0.0001). Epinephrine was used in 43.8% of anaphylaxis episodes. After Emergency Department treatment, epinephrine was prescribed to 13% of patients. Conclusions: Drugs (NSAIDs and BLA), foods (milk and egg in children and shellfish, fruits and fish in adults) and fire ants were the most common inducers of anaphylaxis. Epinephrine was used in less than half of the episodes emphasizing the urgent need to improve dissemination and implementation of anaphylaxis guidelines.Revisión por pare

Accuracy of five electronic foramen locators with different operating systems: an ex vivo study

OBJECTIVE: The aim of this study was to evaluate, ex vivo, the precision of five electronic root canal length measurement devices (ERCLMDs) with different operating systems: the Root ZX, Mini Apex Locator, Propex II, iPex, and RomiApex A-15, and the possible influence of the positioning of the instrument tips short of the apical foramen. MATERIAL AND METHODS: Forty-two mandibular bicuspids had their real canal lengths (RL) previously determined. Electronic measurements were performed 1.0 mm short of the apical foramen (-1.0), followed by measurements at the apical foramen (0.0). The data resulting from the comparison of the ERCLMD measurements and the RL were evaluated by the Wilcoxon and Friedman tests at a significance level of 5%. RESULTS: Considering the measurements performed at 0.0 and -1.0, the precision rates for the ERCLMDs were: 73.5% and 47.1% (Root ZX), 73.5% and 55.9% (Mini Apex Locator), 67.6% and 41.1% (Propex II), 61.7% and 44.1% (iPex), and 79.4% and 44.1% (RomiApex A-15), respectively, considering ±0.5 mm of tolerance. Regarding the mean discrepancies, no differences were observed at 0.0; however, in the measurements at -1.0, the iPex, a multi-frequency ERCLMD, had significantly more discrepant readings short of the apical foramen than the other devices, except for the Propex II, which had intermediate results. When the ERCLMDs measurements at -1.0 were compared with those at 0.0, the Propex II, iPex and RomiApex A-15 presented significantly higher discrepancies in their readings. CONCLUSIONS: Under the conditions of the present study, all the ERCLMDs provided acceptable measurements at the 0.0 position. However, at the -1.0 position, the ERCLMDs had a lower precision, with statistically significant differences for the Propex II, iPex, and RomiApex A-15