148 research outputs found

    SPARQLing Neo4J

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    The growth experienced by the internet in the past few years as lead to an increased amount of available data and knowledge obtained from said data. However most of this knowledge is lost due to the lack of associated semantics making the task of interpreting data very hard to computers. To counter this, ontologies provide a extremely solid way to represent data and automatically derive knowledge from it. In this article we’ll present the work being developed with the aim to store and explore ontologies in Neo4J. In order to achieve this a web frontend was developed, integrating a SPARQL to CYPHER translator to allow users to query stored ontologies using SPARQL. This translator and its code generation is the main subject of this paper.(undefined

    SPARQL versus CYPHER: um estudo comparativo

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    Dissertação de mestrado em Engenharia InformáticaCom a crescente necessidade de armazenar dados sobre forma digital as ontologias tornam-se cada vez mais relevantes como maneira simples de expressar conhecimento. Assim bases de dados capazes de guardar este tipo de estruturas de dados de modo eficaz, nomeadamente bases de dados orientadas a grafos, têm visto a sua utilização aumentar. Nesta dissertação foram estudados dois motores de base de dados deste tipo: o GraphDB (Ontotext (2020a)) e o Neo4j (Neo4j (2020)). GraphDB foi criado para armazenamento de ontologias Web: OWL (Group (2012)), SKOS (Group (2009)) e RDF (Group (2014)), podendo estas ser interrogadas através de SPARQL (W3C (2013a)), enquanto Neo4J foi desenhado para armazenar informação fortemente relacionada: grafos de informação dos quais as ontologias fazem parte, sendo CYPHER (Neo4J (2020b)) a linguagem de query utilizada para a sua exploração. Nesta dissertação estudou-se a viabilidade de armazenar ontologias em Neo4J e explorá-las utilizando CYPHER. Ao longo do processo da resolução deste problema foi determinado um segundo objectivo: criar uma camada tecnológica que permite o uso de SPARQL para interrogar o Neo4J. Nesse sentido foi realizado um estudo comparativo das duas linguagens, implementou-se um compilador capaz de traduzir um subconjunto de queries SPARQL em CYPHER e foi desenvolvida uma bateria de testes que permitem fazer o benchmark ing da tecnologia criada. Finalmente foi construído um protótipo Web que implementa uma frontend sobre o Neo4J de modo a permitir não só armazenar ontologias como interrogá-las através de SPARQL.With the growing need of storing data in the Web, ontologies are becoming more and more relevant as a simple way of expressing knowledge. As such, databases capable of storing such structures effectively, namely Graph Databases, have seen their use grown. In this dissertation we studied two Graph Database Engines: GraphDB (Ontotext (2020a)) and Neo4J (Neo4j (2020)). GraphDB was created to store Web based ontologies: OWL (Group (2012)), SKOS (Group (2009)) and RDF (Group (2014)), allowing for their querying through SPARQL (W3C (2013a)), while Neo4J was designed to store strongly linked data: information graphs of which ontologies are an example, with CYPHER (Neo4J (2020b)) as the query language for their exploration. In this dissertation we studied the viability to store ontologies using Neo4J and explore them through CYPHER. Exploring this second problem led to a second objective: the creation of a technological layer that allows the use of SPARQL queries in a Neo4J database. To do this a study was done to compare both languages, a compiler to translate a subset of SPARQL queries into CYPHER was implemented and a series of tests were made to allow the benchmarking of the developed tech. Finally a Web app prototype that implements a frontend over Neo4J and allows the storage of ontologies and their interrogation by SPARQL was created

    Efeitos dos esportes de combate sobre a massa óssea: revisão sistemática

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    To determine the influence of combat sports on bone mass. Methods: A systematic review was performed according to the PRISMA method, with searches in the Pubmed, Bireme, Embase and Web of Science databases covering the period 1900 to 2015, using the keywords "martial arts", "fight", "combat","karate","kung fu","tae kwon do","judo","aikido","bone mass","bone health","bone tissue","bone density", and "bone mineral contents The articles were searched for and retrieved electronically and manually, by two independent reviewers. Results: Seventy-nine articles were identified, of which 25 were duplicates, leaving 54 for reading and evaluation of the titles; next, articles about diseases such as bone and/or orthopedic injuries, maxillofacial, surgeries, fractures, osteoporosis and osteopenia in women, prevention of falls, and physical fitness were excluded, leaving 15 articles. Of the articles selected and retrieved in full, all were published between 2002 and 2015. One article was a case control study; two were longitudinal studies, two were randomized studies; and 10 were cross-sectional studies. A total of 1368 children, adolescents, adults and elderly subjects were involved in combat sports and had bone evaluation by imaging. Factors such as calorie intake, calcium and/or vitamin D, intensity and volume of the exercise, hormonal aspects as bone markers, and characteristics of menopause are not conclusive in relation to bone mass, and further studies are needed. Conclusion:The practice of combat sports shows a significant improvement in bone mass at all ages253240244COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESVerificar a influência dos esportes de combate sobre a massa óssea. Foi realizada revisão sistemática da literatura de acordo com o método PRISMA, com buscas nas bases de dados Pubmed, Bireme, Embase e Web of Science, referente ao período de 1900 a 2015, com os descritores “martial arts”, “fight”, “combat”, “karate”, “kung fu”, “tae kwon do”, “judo”, “aikido”, “bone”, “bone mass”, “bone health”, “bone tissue”, “bone density”, “bone mineral contents”. A busca e a recuperação dos artigos foram realizadas por meio eletrônico e manual, executadas por dois revisores independentes. Foram identificados 79 artigos, dos quais, 25 eram duplicados, restando 54 artigos para leitura e avaliação dos títulos; posteriormente, foram excluídos os que tratavam de doenças como lesões ortopédicas e/ou ósseas, maxilofaciais, cirurgias, fraturas, mulheres osteopênicas e osteoporóticas, prevenção de quedas e aptidão física, restando 15 artigos. Dos estudos selecionados e encontrados na íntegra, todos foram publicados entre 2002 e 2015. Apenas um era estudo de caso controle, dois eram estudos longitudinais, dois estudos randomizados e 10 estudos transversais. Verificou-se um total de 1.368 crianças, adolescentes, adultos e idosos envolvidos em esportes de combate e avaliação óssea por imagem. Fatores como ingestão calórica, de cálcio e/ou vitamina D, intensidade e volume do exercício, aspectos hormonais como marcadores ósseos e características da menopausa não são conclusivos com relação à massa óssea e requerem um número maior de estudos. A prática de esportes de combate evidencia melhora significativa na massa óssea em todas as idadesLaboratorio de Crescimento e Desenvolvimento do CIPED, Biblioteca - FCM - UNICAMP; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brazil (CAPES)CAPES [001

    Inquérito sorológico de hantavírus em roedores, Uberlândia, Minas Gerais, Brasil

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    Realizamos um estudo transversal para identificar a presença de infecção por hantavírus em roedores em Uberlândia, Minas Gerais, e também para identificar e caracterizar fatores associados. Roedores foram capturados usando armadilhas do tipo Sherman em ambientes rural e periurbano. Um total de 611 roedores foi capturado. Houve maior sucesso de captura na área periurbana (26,3%) e maior prevalência de anticorpos entre os roedores capturados na área rural (2,9%). Necromys lasiurus foi a espécie mais encontrada (42,2%) e a mais frequentemente infectada (4,6%). Um Calomys tener (1/141; 0.7%) e um Calomys sp. (1/14; 7.1%) foram também positivos. Os dados obtidos mostram que em N. lasiurus, a prevalência de anticorpos está relacionada à densidade populacional (p < 0.01), a classe de idade (p = 0.003) e a presença de cicatrizes (p = 0.02), confirmando que a transmissão horizontal é o principal mecanismo que mantém o vírus na natureza. A maior positividade em N. lasiurus é consistente com estudos genéticos que permitem associar esta espécie como reservatório do vírus Araraquara; a soropositividade de C. tener e Calomys sp. pode indicar a ocorrência de "spillover infection" ou a presença de outros hantavírus circulantes.We conducted a serological survey to determine the presence of hantavirus infection in rodents in Uberlândia, Minas Gerais as well as to identify and characterize associated factors. Rodents were captured using Sherman live-capture traps set in rural and peri-urban environments. A total of 611 rodents were captured. There was a higher trap success in peri-urban areas (26.3%) and a higher prevalence of antibodies among rodents captured in rural areas (2.9%). Necromys lasiurus was the most common species (42.2%) and the more frequently infected (4.6%). One Calomys tener (1/141; 0.7%) and one Calomys sp. (1/14; 7.1%) were also positive for the hantavirus infection. In N. lasiurus, antibody prevalence correlated with population density (p < 0.01), age class (p = 0.003) and presence of scars (p = 0.02). The data confirm that horizontal transmission is the main mechanism that maintains the virus in nature. The higher seropositivity in N. lasiurus is consistent with genetic studies that associate this species with an Araraquara virus reservoir; the seropositivity of C. tener and Calomys sp. may indicate the occurrence of spillover infection or the presence of other circulating hantaviruses

    Detection and characterization of Bacillus cereus isolated from the dialysis fluid

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    In this study, B. cereus was detected in dialysis fluids within international parameters (ultrapure – maximum limit of 0.1 CFU/mL for heterotrophic bacteria count) by analyzing the pellet obtained through the centrifugation method. We also investigated the ability of the B. cereus isolate to form a biofilm at different temperatures, the production of virulence factors, and the susceptibility to commercial antimicrobial agents. This study demonstrated a high ability of B. cereus to persist in the hemodialysis system, which can be explained by its broad ability to produce a biofilm at 25 °C, its relevant production of virulence factors, such as β-hemolysin, lecithinase and cereulide, and its important resistance pattern to antimicrobial drugs. In conclusion, these new findings expand the understanding that this microorganism should not be neglected and new methods for tracking it should be considered

    Bernard-Burow flap unilateral with cheek mucosa “cutback” for treatment of lower lip tumor: a case report

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    Lip cancer corresponds to 25-30% of all oral cancers, with the lower lip being more frequent. Squamous cell carcinoma (SCC) is the most common subtype, with smoking as one of the main risk factors. The report demonstrates a simple and effective technique for SCC's surgical treatment on a smoking patient's lower lip. Even in a defect larger than 50% of the initial lip diameter, the unilateral Bernard-Burow flap proved feasible. The addition of "cutback" in the mucosa and parsimonious dissection by planes may have provided a good aesthetic and functional evolution since it determined tension relief on the sutures. The less complex execution of this reconstruction, compared to other techniques, can guarantee a good alternative to decrease postoperative morbidity in this type of surgery
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