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1

PHOTO THERMAL STABILITY OF PRAZIQUANTEL  

Microsoft Academic Search

Thin layer chromatographic analysis (TLC) of the sun decomposed and the alkaline hydrolyzed praziquantel has shown that, the degradation products are different. The major alkaline hydrolysis product of praziquantel, 1st. (HP), was isolated, purified and structurally elucidate by applying MS, IR, 1H- NMR and 13C-NMR spectroscopic techniques. The alkaline hydrolyzed and photo irradiated praziquantel solutions at different pH values, variable

Moutasim I. Suleiman; Elfatih I. A; Kamal E. E. Ibrahim; Babiker M. Ahmed; Ahmed E. M. Saeed; Ahmed E. M. E. Hamid

2

21 CFR 520.1870 - Praziquantel tablets.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 2012-04-01 false Praziquantel tablets. 520.1870 Section 520.1870 Food and...NEW ANIMAL DRUGS § 520.1870 Praziquantel tablets. (a) Specifications . Each tablet contains: (1) 34 milligrams (mg)...

2012-04-01

3

21 CFR 520.1870 - Praziquantel tablets.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Praziquantel tablets. 520.1870 Section 520.1870 Food and...NEW ANIMAL DRUGS § 520.1870 Praziquantel tablets. (a) Specifications . Each tablet contains: (1) 34 milligrams (mg)...

2013-04-01

4

21 CFR 520.1870 - Praziquantel tablets.  

Code of Federal Regulations, 2014 CFR

...2014-04-01 2014-04-01 false Praziquantel tablets. 520.1870 Section 520.1870 Food and...NEW ANIMAL DRUGS § 520.1870 Praziquantel tablets. (a) Specifications. Each tablet contains: (1) 34 milligrams (mg)...

2014-04-01

5

21 CFR 520.1870 - Praziquantel tablets.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 2011-04-01 false Praziquantel tablets. 520.1870 Section 520.1870 Food and...NEW ANIMAL DRUGS § 520.1870 Praziquantel tablets. (a) Specifications . Each tablet contains: (1) 34 milligrams (mg)...

2011-04-01

6

21 CFR 520.1870 - Praziquantel tablets.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Praziquantel tablets. 520.1870 Section 520.1870 Food and...NEW ANIMAL DRUGS § 520.1870 Praziquantel tablets. (a) Specifications . Each tablet contains: (1) 34 milligrams (mg)...

2010-04-01

7

21 CFR 520.1199 - Ivermectin, pyrantel, and praziquantel tablets.  

Code of Federal Regulations, 2012 CFR

... Ivermectin, pyrantel, and praziquantel tablets. 520.1199 Section 520.1199 Food... Ivermectin, pyrantel, and praziquantel tablets. (a) Specifications . Each chewable tablet contains: (1) 34 micrograms...

2012-04-01

8

21 CFR 520.1200 - Ivermectin, fenbendazole, and praziquantel tablets.  

Code of Federal Regulations, 2013 CFR

...Ivermectin, fenbendazole, and praziquantel tablets. 520.1200 Section 520.1200 Food...Ivermectin, fenbendazole, and praziquantel tablets. (a) Specifications . Each chewable tablet contains either: (1) 68...

2013-04-01

9

21 CFR 520.1200 - Ivermectin, fenbendazole, and praziquantel tablets.  

Code of Federal Regulations, 2011 CFR

...Ivermectin, fenbendazole, and praziquantel tablets. 520.1200 Section 520.1200 Food...Ivermectin, fenbendazole, and praziquantel tablets. (a) Specifications . Each chewable tablet contains either: (1) 68...

2011-04-01

10

21 CFR 520.1200 - Ivermectin, fenbendazole, and praziquantel tablets.  

Code of Federal Regulations, 2014 CFR

...Ivermectin, fenbendazole, and praziquantel tablets. 520.1200 Section 520.1200 Food...Ivermectin, fenbendazole, and praziquantel tablets. (a) Specifications. Each chewable tablet contains either: (1) 68...

2014-04-01

11

21 CFR 520.1200 - Ivermectin, fenbendazole, and praziquantel tablets.  

Code of Federal Regulations, 2012 CFR

...Ivermectin, fenbendazole, and praziquantel tablets. 520.1200 Section 520.1200 Food...Ivermectin, fenbendazole, and praziquantel tablets. (a) Specifications . Each chewable tablet contains either: (1) 68...

2012-04-01

12

21 CFR 520.1199 - Ivermectin, pyrantel, and praziquantel tablets.  

Code of Federal Regulations, 2013 CFR

... Ivermectin, pyrantel, and praziquantel tablets. 520.1199 Section 520.1199 Food... Ivermectin, pyrantel, and praziquantel tablets. (a) Specifications . Each chewable tablet contains: (1) 34 micrograms...

2013-04-01

13

21 CFR 520.1199 - Ivermectin, pyrantel, and praziquantel tablets.  

Code of Federal Regulations, 2014 CFR

... Ivermectin, pyrantel, and praziquantel tablets. 520.1199 Section 520.1199 Food... Ivermectin, pyrantel, and praziquantel tablets. (a) Specifications. Each chewable tablet contains: (1) 34 micrograms...

2014-04-01

14

21 CFR 520.1199 - Ivermectin, pyrantel, and praziquantel tablets.  

Code of Federal Regulations, 2011 CFR

... Ivermectin, pyrantel, and praziquantel tablets. 520.1199 Section 520.1199 Food... Ivermectin, pyrantel, and praziquantel tablets. (a) Specifications . Each chewable tablet contains: (1) 34 micrograms...

2011-04-01

15

Praziquantel, Mefloquine-Praziquantel, and Mefloquine-Artesunate-Praziquantel against Schistosoma haematobium: A Randomized, Exploratory, Open-Label Trial  

PubMed Central

Background Treatment and morbidity control of schistosomiasis relies on a single drug, praziquantel. Hence, there is a pressing need to develop additional therapeutics against schistosomiasis. The antimalarial drug mefloquine shows antischistosomal activity in animal models and clinical trials, which calls for further investigations. Methodology We comparatively assessed the efficacy and tolerability of the following treatments against Schistosoma haematobium in school-aged children in Côte d'Ivoire: (i) praziquantel (40 mg/kg; standard treatment); (ii) mefloquine (25 mg/kg) combined with praziquantel (40 mg/kg); and (iii) mefloquine-artesunate (3× (100 mg artesunate +250 mg mefloquine)) combined with praziquantel (40 mg/kg) (treatments administered on subsequent days). Two urine samples were collected before, and on days 21–22 and 78–79 after the first dosing. Principal Findings Sixty-one children were present on all examination time points and had complete datasets. No difference in efficacy was observed between the three treatment groups on either follow-up. On the 21–22 day posttreatment follow-up, based on available case analysis, cure rates of 33% (95% confidence interval (CI) 11–55%), 29% (95% CI 8–50%), and 26% (95% CI 5–48%) were observed for praziquantel, mefloquine-artesunate-praziquantel, and mefloquine-praziquantel, respectively. The corresponding egg reduction rates were 94% and above. On the second follow-up, observed cure rates ranged from 19% (praziquantel) to 33% (mefloquine-artesunate-praziquantel), and egg reduction rates were above 90%. Praziquantel monotherapy was the best tolerated treatment. In the mefloquine-artesunate-praziquantel group, adverse events were reported by 91% of the participants, and in the mefloquine-praziquantel group, 95% experienced adverse events. With the exception of abdominal pain at moderate severity, adverse events were mild. Conclusions/Significance The addition of mefloquine or mefloquine-artesunate does not increase the efficacy of praziquantel against chronic S. haematobium infection. Additional studies are necessary to elucidate the effect of the combinations against acute schistosomiasis. PMID:25033291

Keiser, Jennifer; Silué, Kigbafori D.; Adiossan, Lukas K.; N'Guessan, Nicaise A.; Monsan, N'Chou; Utzinger, Jürg; N'Goran, Eliézer K.

2014-01-01

16

MCR Synthesis of Praziquantel Derivatives  

PubMed Central

Schistosomiasis, a high volume neglected tropical disease affecting more than 200 million people worldwide, can only be effectively treated by the tetrahydroisoquinoline drug praziquantel (PZQ). Herein, we describe an efficient approach to access PZQ derivatives by the Ugi 4-component reaction followed by the Pictet-Spengler reaction in a two-step, one-pot procedure. 30 Novel PZQ derivatives are described based on the Ugi 4-component reaction and an X-ray structure of a novel derivative revealing different conformation compared with PZQ is discussed. Several analogues comparable in activity to the drug PZQ have been identified based on an in vitro Schistosoma mansoni worm viability assay. PMID:22151001

Liu, Haixia; William, Samia; Herdtweck, Eberhardt; Botros, Sanaa; Dömling, Alexander

2013-01-01

17

GESTÃO DO CONHECIMENTO ORGANIZACIONAL ESTUDO DE CASO EM UMA ORGANIZAÇÃO PÚBLICA  

Microsoft Academic Search

1. Introdução Este estudo refere-se ao processo de gestão do conhecimento organizacional na área operacional de uma organização pública e é parte integrante da dissertação de mestrado em Ciências Empresariais pela Universidade Fernando Pessoa de Portugal. Os objetivos do estudo foi identificar por meio de pesquisa como a organização pública gere o conhecimento organizacional e, especificamente, em que consiste este

Lourdes Maria Ritt

18

Queda dos homicídios em São Paulo, Brasil: uma análise descritiva  

PubMed Central

Objetivo Descrever a evolução da mortalidade por homicídios no Município de São Paulo segundo tipo de arma, sexo, raça ou cor, idade e áreas de exclusão/inclusão social entre 1996 e 2008. Métodos Estudo ecológico de série temporal. Os dados sobre óbitos ocorridos no Município foram coletados da base de dados do Programa de Aprimoramento das Informações sobre Mortalidade, seguindo a Classificação Internacional de Doenças, Décima Revisão (CID-10). Foram calculadas as taxas de mortalidade por homicídio (TMH) para a população total, por sexo, raça ou cor, faixa etária, tipo de arma e área de exclusão/inclusão social. As TMH foram padronizadas por idade pelo método direto. Foram calculados os percentuais de variação no período estudado. Para as áreas de exclusão/inclusão social foram calculados os riscos relativos de morte por homicídio. Resultados As TMH apresentaram queda de 73,7% entre 2001 e 2008. Foi observada redução da TMH em todos os grupos analisados, mais pronunciada em homens (?74,5%), jovens de 15 a 24 anos (?78,0%) e moradores de áreas de exclusão social extrema (?79,3%). A redução ocorreu, sobretudo, nos homicídios cometidos com armas de fogo (?74,1%). O risco relativo de morte por homicídio nas áreas de exclusão extrema (tendo como referência áreas com algum grau de exclusão social) foi de 2,77 em 1996, 3,9 em 2001 e 2,13 em 2008. Nas áreas de alta exclusão social, o risco relativo foi de 2,07 em 1996 e 1,96 em 2008. Conclusões Para compreender a redução dos homicídios no Município, é importante considerar macrodeterminantes que atingem todo o Município e todos os subgrupos populacionais e microdeterminantes que atuam localmente, influenciando de forma diferenciada os homicídios com armas de fogo e os homicídios na população jovem, no sexo masculino e em residentes em áreas de alta exclusão social. PMID:21390415

Peres, Maria Fernanda Tourinho; Vicentin, Diego; Nery, Marcelo Batista; de Lima, Renato Sérgio; de Souza, Edinilsa Ramos; Cerda, Magdalena; Cardia, Nancy; Adorno, e Sérgio

2012-01-01

19

Influência da cobertura e do solo na composição florística do sub-bosque em uma floresta estacional semidecidual em Viçosa, MG, Brasil1  

Microsoft Academic Search

RESUMO - (Influência da cobertura e do solo na composição florística do sub-bosque em uma floresta estacional semidecidual em Viçosa, MG, Brasil). A relação ecológica planta-luz tem sido estudada desde o início do século XX. As análises da relação da luminosidade ao nível das comunidades florestais têm se valido de medições indiretas por meio de índices de cobertura, mas sem

João Augusto; Alves Meira-Neto; Fernando Roberto Martins; Agostinho Lopes de Souza

20

FORMAÇÃO EM E-BUSINESS PARA PME'S: UMA APROXIMAÇÃO BAS EADA EM E- LEARNING  

Microsoft Academic Search

Introdução Novas formas de desenvolvimen to das actividades empresariais, associadas a grandes ganhos de produtividade, têm emergido baseadas nos progressos permanentes das tecnologias de informação e comunicação (TIC) e nomeadamente da internet. A adopção das práticas de 'e -business' no tecido empresarial e o aparecimento de novas empresas baseadas nestes modelos tem sido bastante mais limitado na Europa em relação

Sergio Castro; Nuno Caldeira; Eduardo Luís Cardoso

21

Uso de modelos mecânicos em curso informal de astronomia para deficientes visuais. Resgate de uma experiência  

NASA Astrophysics Data System (ADS)

O presente trabalho propõe-se a resgatar uma experiência que teve lugar no Planetário de São Paulo nos anos 60. Em 1962, o Sr. Acácio, então com 37 anos, deficiente visual desde os 27, passou a assistir às aulas ministradas pelo Prof. Aristóteles Orsini aos integrantes do corpo de servidores do Planetário. O Sr. Acácio era o único deficiente da turma e, embora possuísse conhecimentos básicos e relativamente avançados de matemática, enfrentava dificuldades na compreensão e acompanhamento da exposição, como também em estudos posteriores. Com o intuito de auxiliá-lo na superação desses problemas, o Prof. Orsini solicitou a construção de modelos mecânicos que, através do sentido do tato, permitissem o acompanhamento das aulas e a transposição do modelo para o "constructo" mental. Essa prática mostrou-se tão eficaz que facilitou sobejamente o aprendizado da matéria pelo sujeito. O Sr. Acácio passou a integrar o corpo de professores do Planetário/Escola Municipal de Astrofísica, tendo ficado responsável pelo curso de "Introdução à Astronomia" por vários anos. Além disso, a experiência foi tão bem sucedida que alguns dos modelos tiveram seus elementos constitutivos pintados diferencialmente para serem utilizados em cursos regulares do Planetário, tornando-se parte integrante do conjunto de recursos didáticos da instituição. É pensando nessa eficácia, tanto em seu objetivo original permitir o aprendizado de um deficiente visual quanto no subsidiário recurso didático sistemático da instituição que decidimos resgatar essa experiência. Estribados nela, acreditamos ser extremamente produtivo, em termos educacionais, o aperfeiçoamento dos modelos originais, agora resgatados e restaurados, e a criação de outros que pudessem ser utilizados no ensino dessa ciência a deficientes visuais.

Tavares, E. T., Jr.; Klafke, J. C.

2003-08-01

22

21 CFR 520.1447 - Milbemycin oxime, lufenuron, and praziquantel tablets.  

Code of Federal Regulations, 2014 CFR

...Milbemycin oxime, lufenuron, and praziquantel tablets. 520.1447 Section 520.1447 Food and...Milbemycin oxime, lufenuron, and praziquantel tablets. (a) Specifications. Each tablet contains: (1) 2.3 milligrams...

2014-04-01

23

21 CFR 520.1872 - Praziquantel, pyrantel pamoate, and febantel tablets.  

Code of Federal Regulations, 2012 CFR

...Praziquantel, pyrantel pamoate, and febantel tablets. 520.1872 Section 520.1872 Food and...Praziquantel, pyrantel pamoate, and febantel tablets. (a) Specifications . Each tablet or chewable tablet contains either:...

2012-04-01

24

21 CFR 520.1872 - Praziquantel, pyrantel pamoate, and febantel tablets.  

Code of Federal Regulations, 2011 CFR

...Praziquantel, pyrantel pamoate, and febantel tablets. 520.1872 Section 520.1872 Food and...Praziquantel, pyrantel pamoate, and febantel tablets. (a) Specifications . Each tablet or chewable tablet contains either:...

2011-04-01

25

21 CFR 520.1447 - Milbemycin oxime, lufenuron, and praziquantel tablets.  

Code of Federal Regulations, 2013 CFR

...Milbemycin oxime, lufenuron, and praziquantel tablets. 520.1447 Section 520.1447 Food and...Milbemycin oxime, lufenuron, and praziquantel tablets. (a) Specifications. Each tablet contains: (1) 2.3 milligrams...

2013-04-01

26

21 CFR 520.1872 - Praziquantel, pyrantel pamoate, and febantel tablets.  

Code of Federal Regulations, 2013 CFR

...Praziquantel, pyrantel pamoate, and febantel tablets. 520.1872 Section 520.1872 Food and...Praziquantel, pyrantel pamoate, and febantel tablets. (a) Specifications . Each tablet or chewable tablet contains either:...

2013-04-01

27

21 CFR 520.1872 - Praziquantel, pyrantel pamoate, and febantel tablets.  

Code of Federal Regulations, 2014 CFR

...Praziquantel, pyrantel pamoate, and febantel tablets. 520.1872 Section 520.1872 Food and...Praziquantel, pyrantel pamoate, and febantel tablets. (a) Specifications. Each tablet or chewable tablet contains either:...

2014-04-01

28

21 CFR 520.1447 - Milbemycin oxime, lufenuron, and praziquantel tablets.  

Code of Federal Regulations, 2012 CFR

...Milbemycin oxime, lufenuron, and praziquantel tablets. 520.1447 Section 520.1447 Food and...Milbemycin oxime, lufenuron, and praziquantel tablets. (a) Specifications. Each tablet contains: (1) 2.3 milligrams...

2012-04-01

29

Acute toxicity of praziquantel (an anthelmintic) to grass carp and golden shiners  

Technology Transfer Automated Retrieval System (TEKTRAN)

Praziquantel is an anthelmintic that can be applied to the water to kill tapeworm and trematode parasites in fish. Effective praziquantel treatment rates have been determined but there is little information on the toxicity of this chemical to fish hosts of the parasites. Acute praziquantel toxicit...

30

Representaes Qunticas no Espao de Fases Uma funo de onda abstrata | > um vetor em um espao de Hilbert. Esse vetor pode ser expresso  

E-print Network

espaço de Hilbert. Esse vetor pode ser expresso em termos de uma infinidade de representações ortonormais. Assim nenhuma função das coordenadas (q,p) pode ser definida de forma a ser interpretada como" dado o Princípio da Incerteza. Uma excelente revisão desse formalismo pode ser encontrado em [13,14]. 2

de Aguiar, Marcus A. M.

31

21 CFR 520.903d - Febantel-praziquantel paste.  

Code of Federal Regulations, 2014 CFR

...milligrams of praziquantel per kilogram of body weight (1 gram of paste per 5 pounds body weight) administered by mouth on a full stomach once daily for 3 days. (2) Indications for use. (i) Dogs and puppies: For removal of hookworms (Ancylostoma...

2014-04-01

32

21 CFR 520.903d - Febantel-praziquantel paste.  

Code of Federal Regulations, 2012 CFR

...milligrams of praziquantel per kilogram of body weight (1 gram of paste per 5 pounds body weight) administered by mouth on a full stomach once daily for 3 days. (2) Indications for use. (i) Dogs and puppies: For removal of hookworms (Ancylostoma...

2012-04-01

33

21 CFR 520.903d - Febantel-praziquantel paste.  

Code of Federal Regulations, 2013 CFR

...PRODUCTS ORAL DOSAGE FORM NEW ANIMAL DRUGS § 520.903d Febantel-praziquantel...Limitations. Do not use in pregnant animals. Federal law restricts this...considerations. Consider alternative therapy or use with caution in animals with pre-existing liver...

2013-04-01

34

21 CFR 520.903d - Febantel-praziquantel paste.  

Code of Federal Regulations, 2011 CFR

...PRODUCTS ORAL DOSAGE FORM NEW ANIMAL DRUGS § 520.903d Febantel-praziquantel...Limitations. Do not use in pregnant animals. Federal law restricts this...considerations. Consider alternative therapy or use with caution in animals with pre-existing liver...

2011-04-01

35

Voc conseguiu. A partir de agora voc vai estudar, pesquisar e conviver em uma universidade pblica,  

E-print Network

matrícula e a senha. Na BU o calouro vai encontrar 305 mil exemplares de livros e 5000 assinatu- ras de diversos periódicos, entre revis- tas e jornais especializados. Podem ser pegos até dez livros de uma só livro ­ por isso, é melhor não vacilar e entregar no dia. O aluno pode ficar com os livros por mais 15

Floeter, Sergio Ricardo

36

THE ACUTE TOXICITY OF PRAZIQUANTEL TO GRASS CARP AND GOLDEN SHINERS  

Technology Transfer Automated Retrieval System (TEKTRAN)

Acute praziquantel toxicity and no observable effect concentrations (NOEC), were determined in the laboratory for grass carp and golden shiners, two commercially raised cyprinids known to harbor Asian tapeworm Bothriocephalus acheilognathi. Praziquantel is an anthelmintic used to treat fish with ta...

37

Descrição e resultados do 2º ano de uma experiência de ensino na área da compreensão de textos em ciências1  

Microsoft Academic Search

Resumo A presente comunicação descreve estratégias e materiais de ensino desenvolvidos no segundo ano de uma experiência de ensino cujo objectivo é a promoção e a avaliação da compreensão textual em Ciências. A aplicação desta metodologia foi realizada ao longo do ano lectivo 2001\\/ 2002, no 3º ciclo do ensino básico, numa turma do 7º ano de escolaridade e tem

Maria Helena Salema; Sandra Afonso

38

Uma Comparação entre Técnicas de Propagação de Erros em Astrofísica: Monte Carlo x Bootstrap  

NASA Astrophysics Data System (ADS)

Neste trabalho é feito um estudo comparativo entre dois algoritmos numéricos usados para propagação de erros em dados experimentais. Um deles é conhecido por Método de Monte carlo e o outro por Método de Bootstrap. Recentemente, Dhullon & Watson argüiram que a aplicação do método de Monte Carlo introduz ruído nos dados, e propuseram então a utilização do Bootstrap como alternativa capaz de produzir resultados superiores. O objetivo deste trabalho é testar a validade dessa afirmação. As duas técnicas foram aplicadas a três problemas diferentes: o ajsute de modelos de emissão LTE simples e atmosfera estelar a espectros estelares observados e o ajuste de curvas de luz de eclipses de Variáveis Cataclísmicas para a detemrinação da distribuição radial de brilho dos seus discos de acréscimo. Os métodos foram testados quanto à sua robusteza, ou seja, a capacidade de prover resultados coerentes enre si. Além disso, as soluções dos métodos foram comparadas. Os resultados indicam que não existe evidência de superioridade de um métodos em relação ao outro.

Zabot, Alexandre; Baptista, Raymundo

2005-07-01

39

Safety of concurrent treatment of dogs with fluralaner (Bravecto¿) and milbemycin oxime - praziquantel.  

PubMed

BackgroundFluralaner (Bravecto¿; Merck/MSD Animal Health) is a novel systemic ectoparasiticide for dogs providing long-acting flea and tick control after a single oral dose. Milbemycin oxime and praziquantel are routinely used to control Dirofilaria immitis and intestinal worm infections in dogs. The safety of concurrent use of fluralaner and a commercially available milbemycin oxime plus praziquantel combination tablet, in particular with regard to gastrointestinal symptoms, was investigated using oral doses at or above the maximum recommended rates.FindingsSome minor and transient clinical findings were observed during the study period; however, none of these was considered to be related to concurrent treatment with fluralaner and milbemycin oxime plus praziquantel, or to the use of either product alone.ConclusionsConcurrent treatment with fluralaner, milbemycin oxime and praziquantel is well tolerated in dogs. PMID:25315498

Walther, Feli M; Fisara, Petr; Allan, Mark J; Roepke, Rainer; Nuernberger, Martin C

2014-10-15

40

Comparison of albendazole, mebendazole and praziquantel chemotherapy of Echinococcus multilocularis in a gerbil model  

Microsoft Academic Search

The efficacy of albendazole (50 mg\\/kg\\/d), mebendazole (50 mg\\/kg\\/d) and praziquantel (500 mg\\/kg\\/d) against established intraperitoneal infections of Echinococcus multilocularis in gerbils was compared by monitoring parasite weight and making ultrastructural observations on treated and untreated material. Praziquantel was the most active protoscolicidal agent, reducing protoscolex viability to less than 2%, although it did not inhibit cyst growth. Albendazole was

D H Taylor; D L Morris; D Reffin; K S Richards

1989-01-01

41

Revealing praziquantel molecular targets using mass spectrometry imaging: an expeditious approach applied to Schistosoma mansoni.  

PubMed

Finding specific molecular targets and the mechanism of action of praziquantel in the treatment of schistosomiasis remains a challenging task. Our efforts were focused on obtaining further information on worm composition before and after exposure to praziquantel in the treatment of schistosomiasis to elucidate the potential sites of action of this drug. Evidence indicates that the lipid bilayer is changed by treatment with praziquantel. Following this rationale, we employed a mass spectrometry imaging-based approach that helped to characterise lipids in specific locations, which are directly involved in the biochemical pathways of the BH strain of Schistosoma mansoni, as well as differentiating the molecular response that each worm sex presents in vivo. Our findings demonstrated significant differences between the chemical markers found in adult worms before and after praziquantel exposure, especially in phospholipids, which were predominantly identified as chemical markers in all samples. Results also indicate that distinct molecular pathways in both male and female worms could be differentially affected by praziquantel treatment. These data shine new light on the mechanism of action of praziquantel, taking a further step towards its full understanding. PMID:25812833

Ferreira, Mônica Siqueira; de Oliveira, Rosimeire Nunes; de Oliveira, Diogo Noin; Esteves, Cibele Zanardi; Allegretti, Silmara Marques; Catharino, Rodrigo Ramos

2015-05-01

42

Efficacy of 6-, 12-, and 24-h praziquantel bath treatments against Asian tapeworm Bothriocephalus acheilognathi in grass carp  

Technology Transfer Automated Retrieval System (TEKTRAN)

Praziquantel is an effective antihelmintic that has been used in dogs and cats as a de-wormer. It has also been used successfully against tapeworms and trematodes in fish. The current study tested the efficacy of praziquantel bath treatments at various concentrations (0.187, 0.375, 0.75, 1.5, 3.0,...

43

Praziquantel Synergistically Enhances Paclitaxel Efficacy to Inhibit Cancer Cell Growth  

PubMed Central

The major challenges we are facing in cancer therapy with paclitaxel (PTX) are the drug resistance and severe side effects. Massive efforts have been made to overcome these clinical challenges by combining PTX with other drugs. In this study, we reported the first preclinical data that praziquantel (PZQ), an anti-parasite agent, could greatly enhance the anticancer efficacy of PTX in various cancer cell lines, including PTX-resistant cell lines. Based on the combination index value, we demonstrated that PZQ synergistically enhanced PTX-induced cell growth inhibition. The co-treatment of PZQ and PTX also induced significant mitotic arrest and activated the apoptotic cascade. Moreover, PZQ combined with PTX resulted in a more pronounced inhibition of tumor growth compared with either drug alone in a mouse xenograft model. We tried to investigate the possible mechanisms of this synergistic efficacy induced by PZQ and PTX, and we found that the co-treatment of the two drugs could markedly decrease expression of X-linked inhibitor of apoptosis protein (XIAP), an anti-apoptotic protein. Our data further demonstrated that down-regulation of XIAP was required for the synergistic interaction between PZQ and PTX. Together, this study suggested that the combination of PZQ and PTX may represent a novel and effective anticancer strategy for optimizing PTX therapy. PMID:23251610

Wu, Zhen Hua; Lu, Ming-ke; Hu, Long Yu; Li, Xiaotong

2012-01-01

44

Schistosoma mansoni P-glycoprotein levels increase in response to praziquantel exposure and correlate with reduced praziquantel susceptibility  

PubMed Central

One potential physiological target for new antischistosomals is the parasite’s system for excretion of wastes and xenobiotics. P-glycoprotein (Pgp), a member of the ATP-binding cassette superfamily of proteins, is an ATP-dependent efflux pump involved in transport of toxins and xenobiotics from cells. In vertebrates, increased expression of Pgp is associated with multidrug resistance in tumor cells. Pgp may also play a role in drug resistance in helminths. In this report, we examine the relationship between praziquantel (PZQ), the current drug of choice against schistosomiasis, and Pgp expression in Schistosoma mansoni. We show that levels of RNA for SMDR2, a Pgp homolog from S. mansoni, increase transiently in adult male worms following exposure to sublethal concentrations (100 – 500 nM) of PZQ. A corresponding, though delayed, increase in anti-Pgp immunoreactive protein expression occurs in adult males following exposure to PZQ. The level of anti-Pgp immunoreactivity in particular regions of adult worms also increases in response to PZQ. Adult worms from an Egyptian S. mansoni isolate with reduced sensitivity to PZQ express increased levels of SMDR2 RNA and anti-Pgp-immunoreactive protein, perhaps indicating a role for multidrug resistance proteins in development or maintenance of PZQ resistance. PMID:19406169

Messerli, Shanta M.; Kasinathan, Ravi S.; Morgan, William; Spranger, Stefani; Greenberg, Robert M.

2009-01-01

45

A hipótese do Investment Development Path: Uma Abordagem por Dados em Painel. Os casos de Portugal e Espanha  

Microsoft Academic Search

Observando as transformações ocorridas na economia mundial no último quarto do século XX, como resultado do processo de liberalização, desregulamentação e abertura dos mercados, um dos traços mais significativos residiu na emergência de Empresas Multinacionais (EMN) em todos os sectores de actividade e países do mundo. Em consequência, os fluxos de investimento directo no estrangeiro (IDE) promovidos por estas EMN

Miguel Fonseca; António Mendonça; José Passos

2009-01-01

46

A Hipótese do Investment Development Path: Uma Abordagem por Dados em Painel. Os Casos de Portugal e Espanha  

Microsoft Academic Search

Observando as transformações ocorridas na economia mundial no último quarto do século XX, como resultado do processo de liberalização, desregulamentação e abertura dos mercados, um dos traços mais significativos residiu na emergência de Empresas Multinacionais (EMN) em todos os sectores de actividade e países do mundo. Em consequência, os fluxos de investimento directo no estrangeiro (IDE) promovidos por estas EMN

Miguel Fonseca; António Mendonça; José Passos

2009-01-01

47

Activity of Praziquantel Enantiomers and Main Metabolites against Schistosoma mansoni  

PubMed Central

A racemic mixture of R and S enantiomers of praziquantel (PZQ) is currently the treatment of choice for schistosomiasis. Though the S enantiomer and the metabolites are presumed to contribute only a little to the activity of the drug, in-depth side-by-side studies are lacking. The aim of this study was to investigate the in vitro activities of PZQ and its main metabolites, namely, R- and S-cis- and R- and S-trans-4?-hydroxypraziquantel, against adult worms and newly transformed schistosomula (NTS). Additionally, we explored the in vivo activity and hepatic shift (i.e., the migration of the worms to the liver) produced by each PZQ enantiomer in mice. Fifty percent inhibitory concentrations of R-PZQ, S-PZQ, and R-trans- and R-cis-4?-hydroxypraziquantel of 0.02, 5.85, 4.08, and 2.42 ?g/ml, respectively, for adult S. mansoni were determined in vitro. S-trans- and S-cis-4?-hydroxypraziquantel were not active at 100 ?g/ml. These results are consistent with microcalorimetry data and studies with NTS. In vivo, single 400-mg/kg oral doses of R-PZQ and S-PZQ achieved worm burden reductions of 100 and 19%, respectively. Moreover, worms treated in vivo with S-PZQ displayed an only transient hepatic shift and returned to the mesenteric veins within 24 h. Our data confirm that R-PZQ is the main effector molecule, while S-PZQ and the metabolites do not play a significant role in the antischistosomal properties of PZQ. PMID:24982093

Meister, Isabel; Ingram-Sieber, Katrin; Cowan, Noemi; Todd, Matthew; Robertson, Murray N.; Meli, Claudia; Patra, Malay; Gasser, Gilles

2014-01-01

48

Praziquantel Treatment Decreases Schistosoma mansoni Genetic Diversity in Experimental Infections  

PubMed Central

Background Schistosomiasis has a considerable impact on public health in many tropical and subtropical areas. In the new world, schistosomiasis is caused by the digenetic trematode Schistosoma mansoni. Chemotherapy is the main measure for controlling schistosomiasis, and the current drug of choice for treatment is praziquantel (PZQ). Although PZQ is efficient and safe, its repetitive large-scale use in endemic areas may lead to the selection of resistant strains. Isolates less susceptible to PZQ have been found in the field and selected for in the laboratory. The impact of selecting strains with a decreased susceptibility phenotype on disease dynamics and parasite population genetics is not fully understood. This study addresses the impact of PZQ pressure on the genetics of a laboratory population by analyzing frequency variations of polymorphic genetic markers. Methodology Infected mice were treated with increasing PZQ doses until the highest dose of 3×300 mg/Kg was reached. The effect of PZQ treatment on the parasite population was assessed using five polymorphic microsatellite markers. Parasitological and genetic data were compared with those of the untreated control. After six parasite generations submitted to treatment, it was possible to obtain a S. mansoni population with decreased susceptibility to PZQ. In our experiments we also observed that female worms were more susceptible to PZQ than male worms. Conclusions The selective pressure exerted by PZQ led to decreased genetic variability in S. mansoni and increased endogamy. The understanding of how S. mansoni populations respond to successive drug pressure has important implications on the appearance and maintenance of a PZQ resistance phenotype in endemic regions. PMID:24367712

Coeli, Regina; Baba, Elio H.; Araujo, Neusa; Coelho, Paulo M. Z.; Oliveira, Guilherme

2013-01-01

49

Activity of tribendimidine and praziquantel combination therapy against the liver fluke Opisthorchis viverrini in vitro and in vivo.  

PubMed

Opisthorchiasis, caused by the liver fluke Opisthorchis viverrini, a food-borne trematode, is an important public health problem; however, only a single drug, praziquantel is available. We investigated tribendimidine-praziquantel combinations against O. viverrini in vitro and in vivo. The IC50 values of 0.16 ?g/ml and 0.05 ?g/ml were determined for praziquantel and tribendimidine, respectively, against adult O. viverrini in vitro. When O. viverrini was exposed to both drugs simultaneously (using a drug ratio based on the IC50 (1:3.2)) a synergistic effect was calculated (combination index (CI) at the IC50= 0.7). A similar result was observed when drug addition in vitro was spaced by the respective half-lives of the drugs (a CI of 0.78 at the IC50 for tribendimidine followed by praziquantel and a CI of 0.47 at the IC50 for praziquantel followed by tribendimidine). In vivo median-effect dose (ED50) values of 191 mg/kg and 147 mg/kg were calculated for praziquantel and tribendimidine, respectively. Low to moderate worm burden reductions (38-62%) were observed in O. viverrini infected hamsters when both drugs were administered simultaneously or on subsequent days, pointing to antagonistic effects in vivo. Further studies are necessary to understand the striking differences between the in vitro and in vivo observations using combinations of praziquantel and tribendimidine on O. viverrini. PMID:22892101

Keiser, J; Adelfio, R; Vargas, M; Odermatt, P; Tesana, S

2013-06-01

50

75 FR 54018 - Oral Dosage Form New Animal Drugs; Praziquantel and Pyrantel  

Federal Register 2010, 2011, 2012, 2013, 2014

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Bayer HealthCare LLC. The supplement provides for two new sizes of praziquantel and pyrantel pamoate tablets used in cats and kittens for the removal of various internal parasites and for a revised kitten age and weight...

2010-09-03

51

Effect of praziquantel on adult Echinococcus granulosus in vitro: scanning electron microscopy.  

PubMed

The effect of praziquantel in vitro at concentrations of 5, 50 and 500 ppm for 1 h resulted in the progressive breakdown of the tegument and in morphologic distortion of adult Echinococcus granulosus when compared to controls. Scanning electron microscopy of all specimens treated in the various concentrations of praziquantel showed loss of most, if not all of the rostellar hooks and changes in the structure of the suckers. Many of the tapeworms immediately detached from the host's gut upon being placed in the drug, and all treated cestodes exhibited contraction or swelling, particularly in the penultimate proglottid. Intense contraction was apparent in the worms exposed to the higher drug concentrations. Characteristic conical microtriches on the terminal proglottid, as observed in the control specimens, became fused and matted when exposed to 5 ppm of praziquantel. At a drug concentration of 50 ppm, the tegumental surface developed grooves or furrows between clumps of fused microtriches, while 500 ppm caused production of holes within the denuded tegument of the parasite. Ovoid bodies, presumed to be eggs, were observed on the outer surfaces and just below the tegument of tapeworms treated with concentrations of 50 ppm. These structures also appeared to adhere to the outer surfaces of specimens exposed to 500 ppm. In view of the foregoing, special care should be taken in handling and disposing of feces from infected or suspect dogs after praziquantel treatment, since the breakdown in the tegumental surface of E. granulosus presumably results in the release of potentially infective eggs. PMID:7324547

Conder, G A; Marchiondo, A A; Andersen, F L

1981-01-01

52

New Insight into the Antifibrotic Effects of Praziquantel on Mice in Infection with Schistosoma japonicum  

PubMed Central

Background Schistosomiasis is a parasitic disease infecting more than 200 million people in the world. Although chemotherapy targeting on killing schistosomes is one of the main strategies in the disease control, there are few effective ways of dealing with liver fibrosis caused by the parasite infection in the chronic and advanced stages of schistosomiasis. For this reason, new strategies and prospective drugs, which exert antifibrotic effects, are urgently required. Methods and Findings The antifibrotic effects of praziquantel were assessed in the murine models of schistosomiasis japonica. Murine fibrosis models were established by cutaneous infection with 14±2 Schistosoma japonicum cercariae. Then, the mice of both chronic (8 weeks post-infection) and advanced (15 weeks post-infection) schistosomiasis were treated by gavage of praziquantel (250 mg/kg, once daily for 3 days) to eliminate worms, and followed by praziquantel anti-fibrosis treatment (300 mg/kg, twice daily for 30 days). The fibrosis-related parameters assessed were areas of collagen deposition, content of hydroxyproline and mRNA expressions of Col1?1, Col3?1, ?-SMA, TGF-?, MMP9, TIMP1, IL-4, IL-10, IL-13 and IFN-? of liver. Spleen weight index, alanine aminotransferase activity and liver portal venous pressure were also measured. The results showed that anti-fibrosis treatment improved liver fibrosis, splenomegaly, hepatic function, as well as liver portal hypertension. In order to confirm the anti-fibrotic properties of praziquantel, we established a CCL4-induced model and revealed that CCL4-induced liver fibrosis was inhibited by PZQ treatment for 30 days. Furthermore, we analyzed the effects of praziquantel on mouse primary hepatic stellate cells (HSCs). It is indicated that mRNA expressions of Col1?1, Col3?1, ?-SMA, TGF-?, MMP9 and TIMP1 of HSCs were all inhibited after praziquantel anti-parasite treatments. Conclusions The significant amelioration of hepatic fibrosis by praziquantel treatment validates it as a promising drug of anti-fibrosis and offers potential of a new chemotherapy for hepatic fibrosis resulting from schistosomiasis. PMID:21629648

Liang, Yue-Jin; Luo, Jie; Yuan, Quan; Zheng, Dan; Liu, Ya-Ping; Shi, Lei; Zhou, Ying; Chen, Ai-Ling; Ren, Yong-Ya; Sun, Ke-Yi; Sun, Yan; Wang, Yong; Zhang, Zhao-Song

2011-01-01

53

ERGONOMIA INFORMACIONAL APLICADA EM MAPA DE RISCOS E SINALIZAÇÕES EXISTENTES EM UMA PLANTA DE PROCESSAMENTO 1 INFORMATIONAL ERGONOMICS APPLIED ON RISK MAPS AND SIGNS IN A PROCESS PLANT  

Microsoft Academic Search

RESUMO: Uma situação de emergência exige um espírito de iniciativa e capacidade de ação rápida do indivíduo. Para que ele possa ter condições de tomar decisões mais rápidas e seguras, é necessário que as sinalizações transmitam mensagens de maneira que não exijam um tempo maior para compreendê-las. O objetivo deste trabalho é verificar a importância da ergonomia informacional no uso

Cássia Vanessa; Albuquerque de Melo; Raul Magalhães Cursino; Vilma Villarouco

54

Sequential analysis of helminth egg output in human stool samples following albendazole and praziquantel administration.  

PubMed

Large-scale administration of anthelminthic drugs currently is the most widely used intervention for controlling morbidity due to schistosomiasis and soil-transmitted helminthiasis. An important issue is drug efficacy monitoring. However, the optimal time points post-treatment for assessing the efficacy of praziquantel against Schistosoma mansoni and albendazole against hookworm infections are not known. Forty-nine schoolchildren infected with S. mansoni and 52 infected with hookworm were treated with a single oral dose of praziquantel (40 mg/kg) and albendazole (400 mg), respectively. Stool samples were collected on 19 occasions over a 44-day post-treatment follow-up period, and two Kato-Katz thick smears per sample were examined at each time point. Both the mean egg counts and observed cure rates varied depending on the time point post-treatment. The highest reduction in the geometric mean egg counts (>97%) and the highest observed cure rate (>97%) of S. mansoni infections were found 15-20 days after praziquantel administration. Among the hookworm-infected children, egg counts decreased rapidly within the first week after albendazole administration (>95%), whereas infection rates showed high and heterogeneous (45.0-71.2%) levels at later time points. Both praziquantel and albendazole were highly efficacious in reducing the overall egg burden of S. mansoni and hookworm, respectively. We suggest that 15-20 days post-treatment is the most appropriate time point for efficacy evaluation of praziquantel against S. mansoni. Although no clear conclusion can be drawn for the optimal timing of efficacy evaluation of albendazole against hookworm, a 2-3-week time frame seems a reasonable compromise. This is justified on logistical grounds (i.e. collection of stool samples only once) and growing emphasis on integrating the control of schistosomiasis and soil-transmitted helminthiasis, including drug efficacy monitoring. PMID:19070583

Scherrer, Alexandra U; Sjöberg, Marita K; Allangba, Alphonse; Traoré, Mahamadou; Lohourignon, Laurent K; Tschannen, Andres B; N'Goran, Eliézer K; Utzinger, Jürg

2009-03-01

55

Evaluation of Oxfendazole, Praziquantel and Albendazole against Cystic Echinococcosis: A Randomized Clinical Trial in Naturally Infected Sheep  

Microsoft Academic Search

BackgroundCystic Echinococosis (CE) is a zoonotic disease caused by larval stage Echinococcus granulosus. We determined the effects of high dose of Oxfendazole (OXF), combination Oxfendazole\\/Praziquantel (PZQ), and combination Albendazole (ABZ)\\/Praziquantel against CE in sheep.Methodology\\/Principal FindingsA randomized placebo-controlled trial was carried out on 118 randomly selected ewes. They were randomly assigned to one of the following groups: 1) placebo; 2) OXF

Cesar M. Gavidia; Armando E. Gonzalez; Eduardo A. Barron; Berenice Ninaquispe; Monica Llamosas; Manuela R. Verastegui; Colin Robinson; Robert H. Gilman

2010-01-01

56

Impact of drug dosage and brand on bioavailability and efficacy of praziquantel  

Microsoft Academic Search

The efficacy of two brands (brand 1=Billricide; Bayer AG, Leverkusen, Germany; brand 2=Distocide; EPICO pharmaceuticals, Cairo, Egypt) of praziquantel (PZQ) in full and half doses (40 and 20 mg kg?1 monitored as percentage egg reduction and cure rate was investigated in S. mansoni infected school-children. A total of 506 school-children (8–16 years of age) were classified into three groups according

Aiesha Metwally; James Bennett; Sanaa Botros; Fatma Ebeid; Gamal-El Din M. El Attar

1995-01-01

57

Critical analysis of cystic echinococcosis control programs and praziquantel use in South America, 1974-2010.  

PubMed

Cystic echinococcosis (CE) is one of the most prevalent zoonoses in Argentina, Brazil, Chile, Peru, and Uruguay. Control programs in South America were originally modeled after programs developed in insular territories, such as Tasmania and New Zealand. The advent and proven effectiveness of praziquantel, plus the experience of insular models, produced high expectations for rapid advances; however, after 30 years of praziquantel use, no endemic area in South America has obtained eradication. In fact, only modest gains in CE control have been made and impact on prevalence among humans has been slight. A major impediment has been the infrastructure needed to administer praziquantel to dogs in rural areas 8 times per year over numerous years, a requirement for rapid attack stage 1. Such an infrastructure has not been financially or politically sustainable in endemic areas, which tend to be the poorest. On the other hand, certain areas in Argentina have had success with simple and economically viable alternatives. Based primarily on continuous field work supported by the local community, these strategies have significantly decreased transmission to humans, the health sector's main objective. In addition, new possibilities and tools, such as the EG95 vaccine, are being evaluated; as are early detection and treatment of asymptomatic carriers. PMID:22427169

Larrieu, Edmundo; Zanini, Fabian

2012-01-01

58

Efficacy and Safety of Praziquantel, Tribendimidine and Mebendazole in Patients with Co-infection of Clonorchis sinensis and Other Helminths  

PubMed Central

Background Both tribendimidine and mebendazole are broad-spectrum drugs for anti-intestinal nematodes. We aim to assess the efficacy and safety of tribendimidine and mebendazole in patients with co-infection of Clonorchis sinensis and other helminths. Method We performed a randomized open-label trial in Qiyang, People's Republic of China. Eligible participants were randomly assigned to one of four groups: (i) a single dose of 400 mg tribendimidine, (ii) 200 mg tribendimidine twice daily, (iii) 75 mg/kg praziquantel divided in four doses within 2 days, and (iv) a single dose of 400 mg mebendazole. Cure rates and egg reduction rates were assessed, and adverse events were monitored after treatments. Uncured patients accepted the second treatment with the same drugs after the first treatment. Results 156 patients were eligible for the study. Results from the first treatment showed that the cure rates of single-dose tribendimidine and praziquantel against C. sinensis were 50% and 56.8%, respectively; the single-dose tribendimidine achieved the cure rate of 77.8% in the treatment for hookworm, which was significantly higher than that of praziquantel; Low cure rates were obtained in the treatment of single-dose tribendimidine against Ascaris lumbricoides and Trichuris trichiura (28.6% and 23.1%). Results of the second treatment illustrated the cure rates of tribendimidine and praziquantel against C. sinensis were 78.1% and 75%, respectively. Most adverse events were mild and transient. Adverse events caused by tribendimidine were significantly less than praziquantel. Conclusion Single-dose tribendimidine showed similar efficacy against C. sinensis as praziquantel with less adverse events, and achieved significantly higher cure rate in the treatment for hookworm than those of praziquantel and mebendazole. Low cure rates, which were still higher than other drugs, were obtained in the treatment of single-dose tribendimidine against Ascaris lumbricoides and Trichuris trichiura. Trial Registration Controlled-Trials.com ISRCTN55086560 PMID:25122121

Xu, Li-Li; Jiang, Bin; Duan, Ji-Hui; Zhuang, Shi-Feng; Liu, Yong-Chun; Zhu, Shi-Qiao; Zhang, Li-Ping; Zhang, Hao-Bing; Xiao, Shu-Hua; Zhou, Xiao-Nong

2014-01-01

59

Comparative effect of mebendazole, albendazole, tribendimidine, and praziquantel in treatment of rats infected with Clonorchis sinensis.  

PubMed

The aim of the study is to understand the anti-Clonorchis sinensis properties of mebendazole and albendazole, and compare to praziquantel and tribendimidine. Two hundred and thirty rats were divided into five batches for experimental treatment. In four batches, each rat was infected orally with 50 or 100 C. sinensis metacercariae. Twenty-eight to 46 days post-infection, groups of rats were treated orally with single doses of mebendazole, albendazole, praziquantel, tribendimidine, or multiple daily doses of albendazole. While in the remaining batch, mebendazole or praziquantel was administered to groups of rats infected each with 50 metacercariae for 7 or 14 days. In each batch of test, untreated but infected rats served as control. All rats were euthanized 2-4 weeks post-drug administration for assessment of efficacy. In the first batch of test, rats treated with mebendazole or tribendimidine at single doses of 150, 75, and 37.5 mg/kg resulted in worm burden reductions of 99.0%, 94.0%, and 73.1%, or 98.0%, 80.6%, and 60.4%, respectively. When rats were treated with albendazole at the same dose levels, no or poor effect was seen. In the second batch of test, promising effect against adult C. sinensis in rats treated with mebendazole or tribendimidine at single doses of 100 and 50 mg/kg were also observed, but under the single dose of 25 mg/kg, only tribendimidine still remained the effect. In the third batch of test, the aforementioned three single dose levels of mebendazole, albendazole and praziquantel were applied. Again, mebendazole exhibited higher effect and albendazole exhibited no or poor effect. While praziquantel, administered at a higher dose of 300 mg/kg, also showed promising effect. In the fourth batch of test, oral administration of albendazole at a daily dose of 150 or 100 mg/kg for 2 or 3 days resulted in moderate or higher efficacy with worm burden reductions of 79.2% and 91.9%, respectively. In the fifth batch of test, single mebendazole doses of 150 or 75 mg/kg exhibited promising effect against 14-day-old C. sinensis in rats with worm burden reductions of 95.3% and 86.4%, respectively, but mebendazole was short of the effect against 7-day-old worms. Under the same dose level, praziquantel possessed an effect against both 7- and 14-day-old juvenile C. sinensis. The results confirm that in infected rats, mebendazole administered orally at a single dose of 150 mg/kg exhibits potential effect against juvenile (14-day-old) and adult C. sinensis. No or less effect is obtained from albendazole under the same dose levels, but extension of treatment course may enhance the effect of albendazole against this species of fluke. The single effective dose ranges of mebendazole and tribendimidine against C. sinensis in rats are similar with a broad window, while the window for praziquantel is narrow. PMID:21136080

Xiao, Shu-hua; Xue, Jian; Xu, Li-li; Zhang, Yong-nian; Qiang, Hui-qin

2011-03-01

60

Routine drug and food interactions during antihelminthic treatment of neurocysticercosis: a reason for the variable efficacy of albendazole and praziquantel?  

PubMed

Neurocysticercosis (NC) or infection of the central nervous system with Taenia solium larvae is a leading cause of preventable seizures and epilepsy in endemic regions across the globe. Albendazole and praziquantel are commonly used antihelminthic agents to treat NC; however, viable cysts persist in the majority of patients, putting them at risk for future seizures and other neurological complications. Because of their pharmacokinetic profiles, albendazole and praziquantel have the potential to interact with many different drugs. During antihelminthic treatment, antiepileptic drugs and corticosteroids are commonly co-administered to manage seizures and cerebral edema; however, the most commonly used agents from these drug classes are known to significantly alter plasma concentrations of albendazole and praziquantel. The overarching issue with drug interactions during the treatment of NC is whether or not they have clinical relevance, as the plasma concentrations of albendazole and praziquantel have not been directly linked with eradication of viable cysts. Future studies should attempt to evaluate the validity of a causal relationship between antihelminthic plasma concentrations and outcomes so that drug interactions can be better understood and managed and so that treatment can be optimized. PMID:24443292

Romo, Matthew L; Carpio, Arturo; Kelvin, Elizabeth A

2014-04-01

61

Elimination of Asian fish tapeworms from grass carp with praziquantel bath treatments: The need for 24 hour exposures  

Technology Transfer Automated Retrieval System (TEKTRAN)

Several states require that imported fish be free of the Asian fish tapeworm Bothriocephalus acheilognathi. Praziquantel has been used for several years to treat fish with Asian fish tapeworms but rates and exposure periods necessary to eliminate these tapeworms from infected fish have not been ade...

62

Efficacy of praziquantel and artemisinin derivatives for the treatment and prevention of human schistosomiasis: a systematic review and meta-analysis  

PubMed Central

Background Praziquantel has been used as first-line drug for chemotherapy of schistosomiasis since 1984. Besides praziquantel, artemether and artesunate have also been used for the control of this infectious disease since late 1990s. In this article, we conducted a systematic review and meta-analysis to evaluate the antischistosomal efficacy of different medication strategies including monotherapy or combination therapies of these drugs. Results A number of 52 trials from 38 articles published in peer-reviewed journals before July 2011 were selected for analysis after searching the following literature databases: the Cochrane Library, PubMed/Medline, ISI Web of Science, Chinese Biomedicine Literature Database, and China National Knowledge Infrastructure. Our meta-analyses showed that a dosage of 30-60 mg/kg praziquantel compared with placebo produced a protection rate of about 76% (95% CI: 67%-83%) for treating human schistosomiasis, which varied from 70% to 76% with no significant differences among the subspecies S. haematobium, S. japonicum or S. mansoni. Protection rates were higher when praziquantel doses were elevated, as concluded from the nRCTs results: the protection rate of praziquantel at 40 mg/kg was 52% (95% CI: 49%-55%), and it increased to 91% (95% CI: 88%-92%) when the dosages were elevated to 60/80/100 mg/kg divided two or more doses. Multiple doses of artemether or artesunate over 1- or 2-week intervals resulted in protection rates of 65% to 97% for preventing schistosomiasis, and increased doses and shorter medication intervals improved their efficacies. Praziquantel and artemisinin derivatives (artemether or artesunate) in combination resulted in a higher protection rate of 84% (95% CI: 64%-91%) than praziquantel monotherapy for treatment. praziquantel and artesunate in combination had a great protection rate of 96% (95% CI: 78%-99%) for preventing schistosomes infection. Conclusions According to the results, praziquantel remains effective in schistosomiasis treatment, and multiple doses would improve its efficacy; meanwhile, praziquantel is also a good drug for preventing acute schistosomiasis morbidity. It's better to use multiple doses of artemether or artesunate with 1- or 2-week intervals for prevention against schistosome infection. Praziquantel and artemether or artesunate in combination perform better in treatment than praziquantel monotherapy, and they are especially suitable for treating the patients with repeated exposure to infected water. PMID:22004571

2011-01-01

63

Learning Astronomy by Playing in a Park. (Spanish Title: Aprender AstronoMía Jugando en Una Plaza.) Aprender Astronomia Brincando em Uma Praça  

NASA Astrophysics Data System (ADS)

Some public-square games are presented in this paper, considered as didactic modules to help children imagine astronomical processes, based on the concept that learning in Astronomy should be developed to strengthen the relationship of our body with three-dimensional space and time, much in the same way we experience when observing the actual sky, holding a permanent "dialogue" between the actual world and what is to be learned. The games presented (merry-go-rounds and slides) were designed to work on the astronomical concepts related to the translation of the Earth around the Sun, the phases of the Moon and gravity, and on what is perceived by an observer about those phenomena. The description of each game, their physical and astronomical foundations, and a critical comment about their didactical importance are the key parts of the paper. Finally, a recommendation is given about the role teachers should play to be essential partners in the process of learning Astronomy by means of the interaction with these games. Se presentan en este trabajo algunos juegos de plaza, considerados como módulos didácticos para imaginar procesos astronómicos, a partir de la concepción de que el aprendizaje en Astronomía debe desarrollarse fortaleciendo la relación del propio cuerpo con el espacio tridimensional y con el tiempo, tal como se vive al observar el cielo, construyendo un "diálogo" entre el mundo real y los aprendizajes a construir. Los juegos presentados (calesitas y toboganes) fueron diseñados para trabajar sobre la traslación de la Tierra en torno al Sol, las fases de la Luna y la gravedad, y sobre lo que un observador percibe de los mismos. Se da la descripción de cada juego, se discuten sus fundamentos físicos y astronómicos, y se desarrolla una crítica didáctica de los mismos. Finalmente, se comenta el rol que deberían tener los docentes en el acompañamiento a los aprendices en el proceso de interacción con los juegos presentados. Apresentam-se neste trabalho alguns jogos de praça, considerados como módulos didáticos para imaginar processos astronômicos, a partir da concepção de que a aprendizagem em Astronomia deve-se desenvolver fortalecendo a relação do próprio corpo com o espaço tridimensional e com o tempo, tal como se vive ao observar o céu, construindo um "diálogo" entre o mundo real e as aprendizagens a construir. Os jogos apresentados (carrosséis e tobogãs) foram desenhados para trabalhar sobre a translação da Terra em torno do Sol, as fases da Lua e a gravidade, e sobre o que um observador percebe dos mesmos. Dá-se a descrição de cada jogo, discutem-se seus fundamentos físicos e astronômicos, e desenvolve-se uma crítica didática dos mesmos. Finalmente, comenta-se o papel que deveriam ter os docentes no apoio aos aprendizes no processo de interação com os jogos apresentados.

Camino, Néstor

2012-12-01

64

Instituto Brasileiro de Informao em Cincia e Tecnologia  

E-print Network

ibict Instituto Brasileiro de Informação em Ciência e Tecnologia OJS em uma Hora 1 OJS em uma hora Meinert ­ 06 de outubro de 2006 #12;ibict Instituto Brasileiro de Informação em Ciência e Tecnologia OJS Brasileiro de Informação em Ciência e Tecnologia OJS em uma Hora 3 Visão GeralVisão GeralVisão Geral

Paraná, Universidade Federal do

65

Effect of praziquantel treatment of Schistosoma mansoni during pregnancy on immune responses to schistosome antigens among the offspring: results of a randomised, placebo-controlled trial.  

E-print Network

Abstract Background Offspring of women with schistosomiasis may exhibit immune responsiveness to schistosomes due to in utero sensitisation or trans-placental transfer of antibodies. Praziquantel treatment during pregnancy boosts maternal immune...

Tweyongyere, Robert; Mawa, Patrice A; Kihembo, Macklyn; Jones, Frances M; Webb, Emily L; Cose, Stephen; Dunne, David W; Vennervald, Birgitte J; Elliott, Alison M

2011-09-02

66

Efficacy of Milbemax (milbemycin oxime + praziquantel) in the treatment of dogs experimentally infected with Crenosoma vulpis.  

PubMed

Crenosoma vulpis, the fox lungworm, infects wild and domestic canids and is a cause of chronic respiratory disease in dogs in North America and Europe. The objective of this study was to determine the efficacy of milbemycin oxime (0.5mg/kg)/praziquantel (5mg/kg) (Milbemax; Novartis Animal Health, Inc.) against C. vulpis infection in a randomized, blinded, placebo-controlled study using experimentally infected dogs. Sixteen beagles (8 males, 8 females) were each given 100 infective third-stage larvae of C. vulpis. Fecal samples were examined for first-stage larvae by quantitative Baermann examination pre-exposure and at days 21, 28, 35, 42 and 49 post-infection (PI). All of the dogs were shedding larvae in the feces at 21 days PI. The dogs were randomly assigned to one of two groups. At 28 days PI, Group 1 (4 males, 4 females) received placebo only while Group 2 (4 males, 4 females) received a single treatment of milbemycin oxime (0.5mg/kg) and praziquantel (5mg/kg). The 16 dogs were euthanized and necropsied at 49 days PI. Lungs were removed, assessed for gross lesions (graded on a subjective scale 0-3 with 0 being normal) and C. vulpis were collected by lung-flush and counted. Samples of lung tissue were preserved for evaluation of histopathology and the lesions graded on a subjective scale (0-3 with 0 being normal). Gross and histopathology lesions were detected in all 8 untreated Group 1 dogs with mean subjective lesion scores of 1.8 ± 0.7 (range 1-3) and 3.0 ± 0.0 (range 3), respectively. Gross lesions were observed in 3/8 and histopathology lesions in all 8 of the treated Group 2 dogs with mean subjective lesion scores of 0.4 ± 0.5 (range 0-1) and 1.3 ± 0.4 (range 1-2), respectively. The mean (geometric) number for adult C. vulpis recovered in untreated dogs was 48.3 (range 25-70) compared with 0.65 (range 0-2) in animals treated with Milbemax. The resulting efficacy against C. vulpis was 98.7%. The number of C. vulpis was significantly lower for treated dogs than the burden in the untreated group (p=0.0002). A single dose of Milbemax (milbemycin oxime 0.5mg/kg+praziquantel 5mg/kg) was highly effective for the treatment of patent C. vulpis infection in dogs. A dosing interval for the prevention of clinical disease in dogs exposed to natural infections has not been established. PMID:24144516

Conboy, G; Bourque, A; Miller, L; Seewald, W; Schenker, R

2013-12-01

67

Epidemiologic study and control of Taenia solium infections with praziquantel in a rural village of Mexico.  

PubMed

This study reports the results of an epidemiologic survey for the detection of Taenia solium in a rural village of 559 inhabitants in Sinaloa, Mexico, as well as a large scale treatment of the population with praziquantel. The study was carried out in two stages. In stage 1, serial stool analysis of 392 persons detected a cluster of three T. solium tapeworms. A fourth T. solium tapeworm was detected through a household census, giving a 1.32% prevalence rate for this helminth. Over 70% of the population over five years of age was treated with a 10 mg/kg dose of praziquantel, and no additional tapeworms were found. Environmental studies for the detection of Taenia sp. eggs in soil, water, and and objects from the houses of tapeworm-infected individuals showed only one soil sample containing eggs compatible with Taenia sp. A total of 72 domestic pigs were examined for the presence of cysticerci under the tongue. One animal had cysts, and belonged to a household that had two T. solium tapeworm infections. Stage 2 of the study was carried out one year after large scale antihelminthic treatment (LSAT), and no infections with Taenia sp. eggs were found. No cysticercus-infected pigs were detected. Intestinal parasitosis decreased from 69.2% to 37.5%. It is concluded that LSAT with praziquantel is efficient in decreasing endemic foci of T. solium. Seropositivity to T. solium bladder fluid antigens was tested by enzyme-linked immunosorbent assay and found to be 11% before LSAT and 7% one year later. In family members living with T. solium tapeworm carriers, the number of seropositive individuals was 28%. The relative risk ratio of seropositivity for persons living in the same household with a T. solium tapeworm carrier was 2.95. Positive response was significantly higher in the 30-39-year-old age group, in which 30% were seropositive in stage 1, compared with 7% one year after LSAT. High seropositivity rates were significantly associated with tapeworm clusters as well as with individuals with a clinical history of seizures. PMID:1951862

Diaz Camacho, S P; Candil Ruiz, A; Suate Peraza, V; Zazueta Ramos, M L; Felix Medina, M; Lozano, R; Willms, K

1991-10-01

68

Schistosoma mansoni population structure and persistence after praziquantel treatment in two villages of Bahia, Brazil  

PubMed Central

Praziquantel has been used to treat schistosome infections since 1979 and currently is the only chemotherapeutic agent in production for this purpose, raising concerns about the potential for the emergence of drug resistance. In practice, 10–20% of infected patients will continue to excrete eggs after treatment. It is not understood to what degree this represents selection of a resistant population or incomplete elimination due to the presence of immature worms at the time of treatment. We used a population genetics approach to test whether or not persistent Schistosoma mansoni parasites were drawn from the same population as susceptible parasites. In this study, stool samples were collected from 96% of individuals in two small Brazilian communities (populations 482 and 367) and examined for S. mansoni eggs. The combined prevalence of S. mansoni infections in the villages was 41%. Total egg DNA was extracted from each sample and was genotyped at 15 microsatellite markers. Day-to-day variation of the infrapopulation from an individual human host was low (median differentiation using Jost’s D = 0.010), so that a single stool was representative of the genotypes present in stool eggs, at least in the short term. Average pairwise analysis of D among all pre-treatment infrapopulations suggested moderate differentiation (mean D = 0.082 and 0.122 for the two villages), whereas the pre-treatment component population differentiation between the two communities was 0.047. The differentiation of the component population remaining after treatment from the fully susceptible component population was low (mean D = 0.007 and 0.020 for the two villages), suggesting that the persistent parasites were not selected by praziquantel treatment. We will continue to follow these communities for evidence of selection or changes in population structure. PMID:21784077

Blanton, Ronald E; Blank, Walter A; Costa, Jackson M; Carmo, Theomira M; Reis, Eliana A; Silva, Luciano K; Barbosa, Lúcio M; Test, Matthew R; Reis, Mitermayer G

2011-01-01

69

[Intestinal parasites in children in Biankouma, Ivory Coast (mountaineous western region): efficacy and safety of praziquantel and albendazole].  

PubMed

Schistosomiasis and soil-transmitted helminthiasis are a global public health problem, especially among schoolchildren. The purpose of this study was to determine the overall and specific prevalences of intestinal helminth infection and to assess the clinical efficacy, tolerance, and safety of praziquantel and albendazole for treating it. A descriptive cross-sectional study based on random sampling with one degree of freedom was conducted from November 2006 to March 2007 in the primary schools of Biankouma, Côte d'Ivoire. Stool samples were collected from 386 children aged from 4 to 15 years and analyzed by direct examination, with both the simplified Ritchie and Kato techniques. Children infected by schistosomiasis and soil-transmitted helminthiasis eggs were treated with praziquantel (40 mg/kg in a single dose), albendazole (400 mg/kg in a single dose) or both, as deemed necessary. The prevalence rate of intestinal parasite infection was 55.2%, including overall 15.4% with more than one parasite: two in 14.2% and three in 1.2%. Infection was correlated with male gender and older age. The most frequent helminths were Schistosoma mansoni (35.5%) and Necator americanus (25.9%). The efficacy rate for praziquantel, defined as parasite-free stools, was 57.7% on day 14 and 80.9% on day 90. The efficacy rate for albendazole on day 7 was 96.1% for Ascaris lumbricoides, 93% for Necator americanus and 81.3% for Trichuris trichiura. Adverse effects were common (40.8%) but minor (abdominal pain, headache, and itching) within 2 to 4 hours after intake of praziquantel. PMID:23107664

Adoubryn, K D; Kouadio-Yapo, C G; Ouhon, J; Aka, N A D; Bintto, F; Assoumou, A

2012-01-01

70

Treatment and Prevention of Vertical Transmission of Toxocara cati in Cats with an Emodepside\\/Praziquantel Spot-on Formulation  

Microsoft Academic Search

This study aimed to determine the efficacy of emodepside 2.14 %\\/praziquantel 8.58 % topical solution (Profender®, Bayer) in the prevention and treatment of lactogenic Toxocara cati infections. Eight pregnant cats were orally infected with T. cati eggs during late pregnancy. Four queens were treated on day 60 post conception and four queens were left untreated. The kittens\\u000a of two untreated

Sonja Wolken; Roland Schaper; Norbert Mencke; Friederike Kraemer; Thomas Schnieder

2009-01-01

71

Effects of praziquantel and sanguinarine on expression of immune genes and susceptibility to Aeromonas hydrophila in goldfish (Carassius auratus) infected with Dactylogyrus intermedius.  

PubMed

Praziquantel and sanguinarine have been demonstrated positive therapeutic effects on monogenean Dactylogyrus intermedius; however, few studies have considered the post impacts of these antiparasitic chemicals on host after repelling the parasites. The changes of expression of selected immune genes (CCL-1, CXCL-8, IL-1?-1, IL-1?-2, TNF?-1, TNF?-2 and TGF-?) in gill, kidney and spleen and bacterial loads of Aeromonas hydrophila in gill, kidney, spleen and liver following bath administration of these antiparasitic chemicals were evaluated. The results showed that praziquantel and sanguinarine up-regulated to varying degrees of CXCL-8, IL-1?-1, IL-1?-2, TNF?-1 and TNF?-2 in gill, kidney and spleen. They both decreased the CCL-1 expression in gill while increased it in kidney and spleen. However, in all the tested tissues, the expression of TGF-? decreased in praziquantel treated goldfish whereas that increased in sanguinarine treated goldfish. The A. hydrophila challenge test showed that the praziquantel treatment enhanced the susceptibility to A. hydrophila while sanguinarine treatment decreased the susceptibility, as compared with the non-treated group. Overall, the results indicate that bath administration of praziquantel and sanguinarine modulates the immune related genes in goldfish and these may, to some extent, affect their ability to resist bacterial pathogens. PMID:23954698

Zhang, Chao; Ling, Fei; Chi, Cheng; Wang, Gao-Xue

2013-10-01

72

Anlise de Desempenho da Utilizao do Framework AFME em uma Aplicao de Seguimento de Trajetria para Rede de Sensores sem Fio  

E-print Network

para Rede de Sensores sem Fio utilizando Agentes Móveis EDISON PIGNATON DE FREITAS, BERNHARD BÖSCH Avanços na área de comunicação sem fio e rede de sensores permitiram um crescimento do uso de Rede de Sensores sem Fio. Este tipo de rede está sendo utilizada em diversas aplicações emergentes, o que justifica

Wagner, Flávio Rech

73

Ca2+ channels and Praziquantel: a view from the free world  

PubMed Central

Targeting the cellular Ca2+ channels and pumps that underpin parasite Ca2+ homeostasis may realize novel antihelmintic agents. Indeed, the antischistosomal drug praziquantel (PZQ) is a key clinical agent that has been proposed to work in this manner. Heterologous expression data has implicated an action of PZQ on voltage-operated Ca2+ channels, although the relevant in vivo target of this drug has remained undefined over three decades of clinical use. The purpose of this review is to bring new perspective to this issue by discussing the potential utility of free-living planarian flatworms for providing new insight into the mechanism of PZQ action. First, we discuss in vivo functional genetic data from the planarian system that broadly supports the molecular data collected in heterologous systems and the ‘Ca2+ hypothesis’ of PZQ action. On the basis of these similarities we highlight our current knowledge of platyhelminth voltage operated Ca2+ channels, their unique molecular pharmacology and the downstream functional PZQ interactome engaged by dysregulation of Ca2+ influx that has potential to yield novel antischistosomal targets. Overall the broad dataset underscore a common theme of PZQ-evoked disruptions of Ca2+ homeostasis in trematodes, cestodes and turbellarians, and showcase the utility of the planarian model for deriving insight into drug action and targets in parasitic flatworms. PMID:23246536

Chan, John D.; Zarowiecki, Magdalena; Marchant, Jonathan S.

2012-01-01

74

An Artemisinin Derivative of Praziquantel as an Orally Active Antischistosomal Agent  

PubMed Central

Background Schistosomiasis is a major health problem in tropical and sub-tropical areas caused by species of trematode belonging to the genus Schistosoma. The treatment and control of this disease has been relying on the use of a single drug praziquantel. However, the drug resistance concern urged the development of new drugs against schistosoma. Here, we report our systematic biological evaluation of DW-3-15, a new lead compound developed based on our conjugation design rationale as an effective anti-schistosomal agent. Methodology/Principal Findings The antischistosomal activity of DW-3-15 was systematically evaluated in S. japonicum infected mouse model for its stage-sensitivity and dose response. The results revealed that DW-3-15 exhibited 60–85% worm reduction rate against different development stage of worm. Scanning electron microscopy (SEM) observation indicated that DW-3-15 may damage to the tegument of male schistosomes. Conclusions/Significance Our results demonstrated that DW-3-15 showed potent anti-schistosomal activities in vivo. The results strongly support our conjugation design strategy of artemisinin analogs and further development of DW-3-15 as a new lead compound as anti-schistosomal agent. PMID:25386745

Chen, Jinglei; Sun, Huan; Qiao, Chunhua; Xia, Chao-ming

2014-01-01

75

Reinfection of Dogs with Fish-Borne Zoonotic Trematodes in Northern Vietnam following a Single Treatment with Praziquantel  

PubMed Central

Background Fish-borne zoonotic trematodes (FZT) infections including liver- and minute intestinal flukes are common in Southeast Asia in both humans and domestic animals eating raw fish and since 2010, the liver flukes are recognised as neglected tropical diseases by WHO. Mass drug treatment with praziquantel is advised for humans, but no recommendations for control of the FZT in the reservoir hosts exist. Methodology/Principal Findings A study was conducted to assess the ability of praziquantel treatment for control of FZT in farm dogs in an endemic area in Northern Vietnam. Initially, 101 dogs from 73 households were examined for small trematode eggs in their faeces. Forty seven copro-positive dogs were included in the study. Thirty eight dogs received treatment with a single dose of 40 mg/kg of praziquantel. A group of nine dogs were left untreated. Coprological examination for small trematode eggs was performed on day 0, 3, 10, 30, 60, 90 and 120 post treatment. Farmers were questioned about dog keeping practises. All dogs were copro-negative for small trematode eggs on both day 3 and 10 post treatment. From day 30 onwards previously negative dogs became positive again. The reinfection rates were 26.3% (day 30), 45.5% (day 60), 53.1% (day 90), 61.3% (day 120).The nine untreated dogs remained positive throughout the study period. There was no difference in the intensity of infection at day 0 and 120 neither in the treated or untreated group. Conclusion Dogs had easy access to raw fish and did not receive treatment against flukes by their owner. More than 50% of the dogs were reinfected 3 months post treatment. We do not recommend controlling FZT infections in dogs by anthelmintic treatment alone since reinfection occurs fast under the existing farm management systems. PMID:24392175

Nissen, Sofie; Nguyen, Lan Anh Thi; Thamsborg, Stig Milan; Dalsgaard, Anders; Johansen, Maria Vang

2014-01-01

76

Efficacy of combined antiparasitic therapy with praziquantel and albendazole for neurocysticercosis: a double-blind, randomised controlled trial  

PubMed Central

Summary Background Neurocysticercosis causes a substantial burden of seizure disorders worldwide. Treatment with either praziquantel or albendazole has suboptimum efficacy. We aimed to establish whether combination of these drugs would increase cysticidal efficacy and whether complete cyst resolution results in fewer seizures. We added an increased dose albendazole group to establish a potential effect of increased albendazole concentrations. Methods In this double-blind, placebo-controlled, phase 3 trial, patients with viable intraparenchymal neurocysticercosis were randomly assigned to receive 10 days of combined albendazole (15 mg/kg per day) plus praziquantel (50 mg/kg per day), standard albendazole (15 mg/kg per day), or increased dose albendazole (22·5 mg/kg per day). Randomisation was done with a computer generated schedule balanced within four strata based on number of cysts and concomitant antiepileptic drug. Patients and investigators were masked to group assignment. The primary outcome was complete cyst resolution on 6-month MRI. Enrolment was stopped after interim analysis because of parasiticidal superiority of one treatment group. Analysis excluded patients lost to follow-up before the 6-month MRI. This trial is registered with ClinicalTrials.gov, number NCT00441285. Findings Between March 3, 2010 and Nov 14, 2011, 124 patients were randomly assigned to study groups (41 to receive combined albendazole plus praziquantel [39 analysed], 43 standard albendazole [41 analysed], and 40 increased albendazole [38 analysed]). 25 (64%) of 39 patients in the combined treatment group had complete resolution of brain cysts compared with 15 (37%) of 41 patients in the standard albendazole group (rate ratio [RR] 1·75, 95% CI 1·10–2·79, p=0·014). 20 (53%) of 38 patients in the increased albendazole group had complete cyst resolution at 6-month MRI compared with 15 (37%) of 41 patients in the standard albendazole group (RR 1·44, 95% CI 0·87–2·38, p=0·151). No significant differences in adverse events were reported between treatment groups (18 in combined treatment group, 11 in standard albendazole group, and 19 in increased albendazole group). Interpretation Combination of albendazole plus praziquantel increases the parasiticidal effect in patients with multiple brain cysticercosis cysts without increased side-effects. A more efficacious parasiticidal regime without increased treatment-associated side-effects should improve the treatment and long term prognosis of patients with neurocysticercosis. Funding National Institute of Neurological Disorders and Stroke (NINDS), National Institutes of Health. PMID:24999157

Garcia, Hector H; Gonzales, Isidro; Lescano, Andres G; Bustos, Javier A; Zimic, Mirko; Escalante, Diego; Saavedra, Herbert; Gavidia, Martin; Rodriguez, Lourdes; Najar, Enrique; Umeres, Hugo; Pretell, E Javier

2014-01-01

77

Transdermal praziquantel administration attenuates hepatic granulomatosis in mice infected with Schistosoma japonicum.  

PubMed

Liver granuloma is a major pathogenic factor responsible for schistosomiasis, and no effective drugs or therapy methods to treat it have been found so far. Praziquantel (PZQ) has shown some anti-schistosomal effect, but little information is available about the effect of PZQ-prolonged administration on granuloma formation around schistosome eggs. Herein, we investigated the effect of PZQ on hepatic granuloma formation by treating the mice infected with Schistosoma japonicum using a long-term PZQ transdermal delivery. The results showed that the mean area of granulomas in the group treated with PZQ transdermal agent was (175.47?±?116.73)?×?10(3) ?m(2) at the 49th day postinfection and (71.96?±?45.99)?×?10(3) ?m(2) at the 56th day, while that in the control group was (304.51?±?140.55)?×?10(3) ?m(2) and (526.44?±?268.06)?×?10(3) ?m(2), respectively. The content of hydroxyproline in the livers of mice approached to the normal level on the 154th day in the treatment group, but it continued to increase from the 28th day to the 154th day after infection in the control group and nontreatment group. The ALT activity in serum of mice in the treatment group was also significantly lower than that in the control group (*P???0.05). Our results suggest that the long-term PZQ transdermal delivery is critical in the therapeutic approach to control the progress of hepatic schistosomiasis induced by egg granulomas. PMID:25630695

Li-Zhi, Wu; Xin-Sheng, Zheng; Jiang-Shan, Dong; Yi, Wang; Bao-An, Yao

2015-04-01

78

The inability of tapeworm Hymenolepis diminuta and fluke Dicrocoelium dendriticum to metabolize praziquantel.  

PubMed

Biotransformation enzymes can, to a certain extent, protect parasitic worms against the toxic effects of anthelmintics and can contribute to drug-resistance development. The objective of our work was (1) to find and identify phase I and II metabolites of the anthelmintic praziquantel (PZQ) formed by the lancet fluke (Dicrocoelium dendriticum) and the rat tapeworm (Hymenolepis diminuta) and (2) to compare PZQ metabolites in helminths with PZQ biotransformation in rat as host species. Ultra high performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS) was used for this purpose. During in vitro incubations, mitochondria-like and microsomes-like fractions (prepared from homogenates of adult worms or from rat liver homogenate) were incubated with 10 and 100 ?M PZQ. Liquid/liquid extraction was used for samples during in vitro experiments. In the ex vivo study, living D. dendriticum and H. diminuta adults were incubated in RPMI-1640 medium in the presence of 50 nM or 100 nM PZQ for 24h. After incubation, the worms were removed from the medium and homogenized. Homogenates of worms, medium from the incubation of worms or rat hepatocytes and rat urine (collected during 24h after oral PZQ administration) were separately extracted using solid-phase extraction. The results showed that both D. dendriticum and H. diminuta enzymatic systems are not able to metabolize PZQ. On the other hand, thirty one different phase I and four phase II PZQ metabolites were detected in rat samples using UHPLC/MS/MS analyses. These results show that our experimental helminths, as the members of tapeworm and fluke groups of parasites, are not able to deactivate PZQ, and that the biotransformation enzymes of the studied helminths do not contribute to PZQ-resistance. PMID:21996005

Vok?ál, Ivan; Jirásko, Robert; Jedli?ková, Veronika; Bártíková, Hana; Skálová, Lenka; Lamka, Ji?í; Hol?apek, Michal; Szotáková, Barbora

2012-04-30

79

Inhibition or knockdown of ABC transporters enhances susceptibility of adult and juvenile schistosomes to Praziquantel.  

PubMed

Parasitic flatworms of the genus Schistosoma cause schistosomiasis, a neglected tropical disease that affects hundreds of millions. Treatment of schistosomiasis depends almost entirely on the drug praziquantel (PZQ). Though essential to treating and controlling schistosomiasis, a major limitation of PZQ is that it is not active against immature mammalian-stage schistosomes. Furthermore, there are reports of field isolates with heritable reductions in PZQ susceptibility, and researchers have selected for PZQ-resistant schistosomes in the laboratory. P-glycoprotein (Pgp; ABCB1) and other ATP binding cassette (ABC) transporters remove a wide variety of toxins and xenobiotics from cells, and have been implicated in multidrug resistance (MDR). Changes in ABC transporter structure or expression levels are also associated with reduced drug susceptibility in parasitic helminths, including schistosomes. Here, we show that the activity of PZQ against schistosome adults and juveniles ex vivo is potentiated by co-administration of either the highly potent Pgp inhibitor tariquidar or combinations of inhibitors targeting multiple ABC multidrug transporters. Adult worms exposed to sublethal PZQ concentrations remain active, but co-administration of ABC transporter inhibitors results in complete loss of motility and disruption of the tegument. Notably, juvenile schistosomes (3-4 weeks post infection), normally refractory to 2 µM PZQ, become paralyzed when transporter inhibitors are added in combination with the PZQ. Experiments using the fluorescent PZQ derivative (R)-PZQ-BODIPY are consistent with the transporter inhibitors increasing effective intraworm concentrations of PZQ. Adult worms in which expression of ABC transporters has been suppressed by RNA interference show increased responsiveness to PZQ and increased retention of (R)-PZQ-BODIPY consistent with an important role for these proteins in setting levels of PZQ susceptibility. These results indicate that parasite ABC multidrug transporters might serve as important targets for enhancing the action of PZQ. They also suggest a potentially novel and readily-available strategy for overcoming reduced PZQ susceptibility of schistosomes. PMID:25330312

Kasinathan, Ravi S; Sharma, Lalit Kumar; Cunningham, Charles; Webb, Thomas R; Greenberg, Robert M

2014-10-01

80

Initial experiences with praziquantel in the treatment of human infections due to Schistosoma haematobium  

PubMed Central

Initial studies of the tolerance and efficacy of praziquantel in the treatment of human infections due to Schistosoma haematobium were conducted at the WHO Tropical Diseases Research Centre, Ndola, Zambia. The first stage of the trial was a double-blind assessment against placebo of the tolerance and efficacy of oral doses of 1×20, 2×20, or 3×20 mg/kg in patients with a minimum schistosome egg excretion of 50 per random 10-ml sample of urine. Later a single-blind trial was carried out of the efficacy of three oral doses, each of 20 mg/kg, given at 4-hour intervals, or of a single oral dose of 50 mg/kg. In 79 young Zambians with S. haematobium infections (and often other parasitic infections), patient tolerance to the drug was very good, only minor post-treatment symptoms of intermittent epigastric pain, anorexia, and headache being noted, all of short duration. No changes of clinical relevance were detected in the results of a battery of haematological and biochemical tests. Post-treatment eosinophilia occurred in 42% of drug-treated patients but also in 30% of those given placebo. Serial electrocardiograms revealed no changes of significance. At six months after treatment, of 73 patients followed up, only 1 case of parasitological failure was detected. At one year, 66 (83.5%) of 79 patients with S. haematobium infection were followed up and 2 (2.5%) parasitological failures were detected. Two years after treatment, 45 (57%) of 79 patients with S. haematobium showed negative urines, 7 (9%) had positive hatching tests, and 27 (34%) were absent. PMID:396053

Davis, A.; Biles, J. E.; Ulrich, A.-M.

1979-01-01

81

Inhibition or Knockdown of ABC Transporters Enhances Susceptibility of Adult and Juvenile Schistosomes to Praziquantel  

PubMed Central

Parasitic flatworms of the genus Schistosoma cause schistosomiasis, a neglected tropical disease that affects hundreds of millions. Treatment of schistosomiasis depends almost entirely on the drug praziquantel (PZQ). Though essential to treating and controlling schistosomiasis, a major limitation of PZQ is that it is not active against immature mammalian-stage schistosomes. Furthermore, there are reports of field isolates with heritable reductions in PZQ susceptibility, and researchers have selected for PZQ-resistant schistosomes in the laboratory. P-glycoprotein (Pgp; ABCB1) and other ATP binding cassette (ABC) transporters remove a wide variety of toxins and xenobiotics from cells, and have been implicated in multidrug resistance (MDR). Changes in ABC transporter structure or expression levels are also associated with reduced drug susceptibility in parasitic helminths, including schistosomes. Here, we show that the activity of PZQ against schistosome adults and juveniles ex vivo is potentiated by co-administration of either the highly potent Pgp inhibitor tariquidar or combinations of inhibitors targeting multiple ABC multidrug transporters. Adult worms exposed to sublethal PZQ concentrations remain active, but co-administration of ABC transporter inhibitors results in complete loss of motility and disruption of the tegument. Notably, juvenile schistosomes (3–4 weeks post infection), normally refractory to 2 µM PZQ, become paralyzed when transporter inhibitors are added in combination with the PZQ. Experiments using the fluorescent PZQ derivative (R)-PZQ-BODIPY are consistent with the transporter inhibitors increasing effective intraworm concentrations of PZQ. Adult worms in which expression of ABC transporters has been suppressed by RNA interference show increased responsiveness to PZQ and increased retention of (R)-PZQ-BODIPY consistent with an important role for these proteins in setting levels of PZQ susceptibility. These results indicate that parasite ABC multidrug transporters might serve as important targets for enhancing the action of PZQ. They also suggest a potentially novel and readily-available strategy for overcoming reduced PZQ susceptibility of schistosomes. PMID:25330312

Kasinathan, Ravi S.; Sharma, Lalit Kumar; Cunningham, Charles; Webb, Thomas R.; Greenberg, Robert M.

2014-01-01

82

Processo de enfermagem informatizado em unidade de terapia intensiva: uma prática educativa com enfermeiros Computerized nursing process in intensive therapy unit: an educative practice with the nurses Proceso de enfermería informatizado en unidad de terapia intensiva: una práctica educativa con enfermeros  

Microsoft Academic Search

RESUMO Compreendendo-se que o processo de enfermagem é uma ferramenta imprescindível em Unidades de Terapia Intensiva (UTI), esta pesquisa convergente-assistencial objetivou avaliar a aplicação do Processo de Enfermagem informatizado, a partir da Classificação Internacional das Práticas de Enfermagem - CIPE® versão 1.0, com os enfermeiros da UTI do Hospital Universitário da Universidade Federal de Santa Catarina. Como estratégia de coleta

Daniela Couto; Carvalho BarraI; Grace Teresinha; Marcon Dal

83

Clinical Efficacy and Tolerability of Praziquantel for Intestinal and Urinary Schistosomiasis—A Meta-analysis of Comparative and Non-comparative Clinical Trials  

PubMed Central

Background Extensive use of praziquantel for treatment and control of schistosomiasis requires a comprehensive understanding of efficacy and safety of various doses for different Schistosoma species. Methodology/Principal Findings A systematic review and meta-analysis of comparative and non-comparative trials of praziquantel at any dose for any Schistosoma species assessed within two months post-treatment. Of 273 studies identified, 55 were eligible (19,499 subjects treated with praziquantel, control treatment or placebo). Most studied were in school-aged children (64%), S. mansoni (58%), and the 40 mg/kg dose (56%); 68% of subjects were in Africa. Efficacy was assessed as cure rate (CR, n?=?17,017) and egg reduction rate (ERR, n?=?13,007); safety as adverse events (AE) incidence. The WHO-recommended dose of praziquantel 40 mg/kg achieved CRs of 94.7% (95%CI 92.2–98.0) for S. japonicum, 77.1% (68.4–85.1) for S. haematobium, 76.7% (95%CI 71.9–81.2) for S. mansoni, and 63.5% (95%CI 48.2–77.0) for mixed S. haematobium/S. mansoni infections. Using a random-effect meta-analysis regression model, a dose-effect for CR was found up to 40 mg/kg for S. mansoni and 30 mg/kg for S. haematobium. The mean ERR was 95% for S. japonicum, 94.1% for S. haematobium, and 86.3% for S. mansoni. No significant relationship between dose and ERR was detected. Tolerability was assessed in 40 studies (12,435 subjects). On average, 56.9% (95%CI 47.4–67.9) of the subjects receiving praziquantel 40 mg/kg experienced an AE. The incidence of AEs ranged from 2.3% for urticaria to 31.1% for abdominal pain. Conclusions/Significance The large number of subjects allows generalizable conclusions despite the inherent limitations of aggregated-data meta-analyses. The choice of praziquantel dose of 40 mg/kg is justified as a reasonable compromise for all species and ages, although in a proportion of sites efficacy may be lower than expected and age effects could not be fully explored. PMID:25412105

Zwang, Julien; Olliaro, Piero L.

2014-01-01

84

Sensitivity and Specificity of Multiple Kato-Katz Thick Smears and a Circulating Cathodic Antigen Test for Schistosoma mansoni Diagnosis Pre- and Post-repeated-Praziquantel Treatment  

PubMed Central

Background Two Kato-Katz thick smears (Kato-Katzs) from a single stool are currently recommended for diagnosing Schistosoma mansoni infections to map areas for intervention. This ‘gold standard’ has low sensitivity at low infection intensities. The urine point-of-care circulating cathodic antigen test (POC-CCA) is potentially more sensitive but how accurately they detect S. mansoni after repeated praziquantel treatments, their suitability for measuring drug efficacy and their correlation with egg counts remain to be fully understood. We compared the accuracies of one to six Kato-Katzs and one POC-CCA for the diagnosis of S. mansoni in primary-school children who have received zero to ten praziquantel treatments. We determined the impact each diagnostic approach may have on monitoring and evaluation (M&E) and drug-efficacy findings. Method/Principle Findings In a high S. mansoni endemic area of Uganda, three days of consecutive stool samples were collected from primary school-aged children (six - 12 years) at five time-points in year one: baseline, one-week-post-, four-weeks-post-, six-months-post-, and six-months-one-week-post-praziquantel and three time-points in years two and three: pre-, one-week-post- and four-weeks-post-praziquantel-treatment/retreatment (n?=?1065). Two Kato-Katzs were performed on each stool. In parallel, one urine sample was collected and a single POC-CCA evaluated per child at each time-point in year one (n?=?367). At baseline, diagnosis by two Kato-Katzs (sensitivity?=?98.6%) or one POC-CCA (sensitivity?=?91.7%, specificity?=?75.0%) accurately predicted S. mansoni infections. However, one year later, a minimum of three Kato-Katzs, and two years later, five Kato-Katzs were required for accurate diagnosis (sensitivity >90%) and drug-efficacy evaluation. The POC-CCA was as sensitive as six Kato-Katzs four-weeks-post and six-months-post-treatment, if trace readings were classified as positive. Conclusions/Significance Six Kato-Katzs (two/stool from three stools) and/or one POC-CCA are required for M&E or drug-efficacy studies. Although unable to measure egg reduction rates, one POC-CCA appears to be more sensitive than six Kato-Katzs at four-weeks-post-praziquantel (drug efficacy) and six-months-post-praziquantel (M&E). PMID:25211217

Lamberton, Poppy H. L.; Kabatereine, Narcis B.; Oguttu, David W.; Fenwick, Alan; Webster, Joanne P.

2014-01-01

85

Helminth-Associated Systemic Immune Activation and HIV Co-receptor Expression: Response to Albendazole/Praziquantel Treatment  

PubMed Central

Background It has been hypothesized that helminth infections increase HIV susceptibility by enhancing systemic immune activation and hence contribute to elevated HIV-1 transmission in sub-Saharan Africa. Objective To study systemic immune activation and HIV-1 co-receptor expression in relation to different helminth infections and in response to helminth treatment. Methods HIV-negative adults with (n?=?189) or without (n?=?57) different helminth infections, as diagnosed by Kato-Katz, were enrolled in Mbeya, Tanzania. Blinded to helminth infection status, T cell differentiation (CD45RO, CD27), activation (HLA-DR, CD38) and CCR5 expression was determined at baseline and 3 months after Albendazole/Praziquantel treatment. Plasma cytokine levels were compared using a cytometric bead array. Results Trichuris and Ascaris infections were linked to increased frequencies of “activated” CD4 and/or CD8 T cells (p<0.05), whereas Hookworm infection was associated with a trend towards decreased HLA-DR+ CD8 T cell frequencies (p?=?0.222). In Trichuris infected subjects, there was a linear correlation between HLA-DR+ CD4 T cell frequencies and the cytokines IL-1? and IL-10 (p<0.05). Helminth treatment with Albendazole and Praziquantel significantly decreased eosinophilia for S. mansoni and Hookworm infections (p<0.005) but not for Trichuris infection and only moderately modulated T cell activation. CCR5 surface density on memory CD4 T cells was increased by 1.2-fold during Trichuris infection (p-value: 0.053) and reduced after treatment (p?=?0.003). Conclusions Increased expression of T cell activation markers was associated with Trichuris and Ascaris infections with relatively little effect of helminth treatment. PMID:24675895

Chachage, Mkunde; Podola, Lilli; Clowes, Petra; Nsojo, Anthony; Bauer, Asli; Mgaya, Onesmo; Kowour, Dickens; Froeschl, Guenter; Maboko, Leonard; Hoelscher, Michael; Saathoff, Elmar; Geldmacher, Christof

2014-01-01

86

UMA EXPERIÊNCIA COM O PROJETO MANHATTAN NO ENSINO FUNDAMENTAL An experience with the Manhattan Project in the Elementary School  

Microsoft Academic Search

Resumo: O presente artigo discute uma dissertação de mestrado que utilizou uma perspectiva educacio- nal voltada à formação de cidadãos e defendida na proposta de Edgar Morin e no relatório da UNESCO sobre educação para o século XXI. Para isso, aborda a importância de uma nova prática escolar, preocupa- da em manter o estudante como centro das atividades em sala

Rafaela Samagaia; Luiz O. Q. Peduzzi

87

OPTIMIZAC ~ AO EM REDES  

E-print Network

OPTIMIZAC¸ ~ AO EM REDES UMA VIS ~ AO GLOBAL Deolinda Dias Rasteiro, Jose Luis Santos, Marta Braz; Optimiza¸c~ao em Redes ­ Uma Vis~ao Global N = fv 1 ; : : : ; v n g j f1; : : : ; ng ­ conjunto de n'os (v; j) Rede (N ; A) ­ grafo (N ; A) com um v'ertice inicial s e um v'ertice terminal t, a cujos arcos

Pascoal, Marta Margarida Braz

88

O ensino de Física Quântica na perspectiva sociocultural: uma análise de um debate entre futuros professores mediado por um interferômetro virtual de Mach-Zehnder  

Microsoft Academic Search

Resumo: O presente trabalho apresenta uma análise das interações discursivas de nove estudantes do curso de licenciatura em física em uma atividade didática mediada por um interferômetro virtual de Mach-Zehnder. O objetivo desse estudo é analisar as tensões nos enunciados dos alunos à luz do referencial sociocultural e avaliar em que medida os significados em física quântica são criados e

Alexandro Pereira; Fernanda Ostermann; Cláudio Cavalcanti

89

Sobre ciência e moral no sentido de Nietzsche: por uma política da verdade On Science and Morals in Nietzsche's Sense: towards a politics of truth  

Microsoft Academic Search

A tradição platônica compreendeu a relação entre ciência e moral como uma imbricação correspondente à relação entre Verdade em si e Bem em si. Num texto de juventude, Sobre verdade e mentira no sentido extramoral, Nietzsche faz uma crítica a essa tradição em dois movimentos: em primeiro lugar, nega a existência ligação necessária entre Verdade e Bem, à medida que

Thiago Mota

90

Increasing teacher motivation and supervision is an important but not sufficient strategy for improving praziquantel uptake in Schistosoma mansoni control programs: serial cross sectional surveys in Uganda  

PubMed Central

Background Realization of the public health benefits of mass drug administration (MDA) for the control of schistosomiasis depends on achieving and maintaining high annual treatment coverage. In Uganda, the uptake of preventive treatment for schistosomiasis among school-age children in 2011 was only 28%. Strategies are needed to increase uptake. Methods Serial cross-sectional surveys were conducted at baseline (after MDA in 2011) and at follow-up MDA in 2012 where teacher motivation was provided and supervision strengthened in Jinja district of Uganda. Uptake of praziquantel was assessed in 1,010 randomly selected children from 12 primary schools during the baseline survey and in another set of 1,020 randomly selected children from the same primary schools during the follow-up survey. Results Self-reported uptake of praziquantel increased from 28.2% (95% CI 25.4%-30.9%) at baseline to 48.9% (95% CI 45.8%-52.0%) (p?praziquantel at baseline (49.8%, 95% CI 43.8%-55.8%) and at follow-up (46.6%, 95% CI 42%.1-51.2%) (p?=?0.50) as well as in the proportion of children with correct knowledge of schistosomiasis transmission and control between the baseline (45.9%, 95% CI 42.7%-73.7%) and follow-up (44.1%, 95% CI 41.0%- 47.2%) (p?=?0.42). Conclusion Although teacher motivation and supervision to distribute treatment increased the uptake of praziquantel among school-age children, the realized uptake is still lower than is recommended by the World Health Organization (WHO) and apparently too low to affect the prevalence and intensity of schistosomiasis among the children. Additional measures are needed to increase uptake of praziquantel if school-based MDA is to achieve the objective of preventive chemotherapy. PMID:24330594

2013-01-01

91

Percolao com uma linha de defeitos CBPF-Rio de Janeiro-23/11/2011  

E-print Network

Percolação com uma linha de defeitos S. Friedli UFMG CBPF-Rio de Janeiro-23/11/2011 Trabalho em colaboração com D. Ioe e Y. Velenik S. Friedli (UFMG) Percolação com uma linha de defeitos CBPF-Rio de Janeiro) . p 0. S. Friedli (UFMG) Percolação com uma linha de defeitos CBPF-Rio de Janeiro-23

Liu, I-Shih

92

ANLISE DE DESEMPENHO E CONSUMO DE POTNCIA NA COMUNICAO INTERPROCESSOS EM SOFTWARE EMBARCADO  

E-print Network

um microcontrolador Java de aplicação específica. Um sistema de controle embarcado de guindaste foi mensagens. Estes mecanismos foram avaliados em uma plataforma arquitetural baseada em um microcontrolador

Wagner, Flávio Rech

93

PERCEPÇÃO E COMPORTAMENTOS RELACIONADOS COM A SAÚDE DOS ADOLESCENTES PORTUGUESES - UMA ANÁLISE EM FUNÇÃO DO SEXO E DA IDADE Perceived health and health related behaviours of Portuguese adolescents: an analysis by sex and age  

Microsoft Academic Search

RESUMO Objectivos: i) comparar a percepção do estado de saúde dos adolescentes em função do seu sexo e da idade; ii) analisar as relações existentes entre a percepção do estado de saúde dos adolescentes e os seus comportamentos, em cada um dos sexos e diferentes escalões etários. Métodos: Foi utilizado o \\

Nuno Corte-Real; Isabel Balaguer; Cláudia Dias; Rui Corredeira; António Manuel Fonseca

94

Detecção da fase impulsiva de uma explosão solar gigante até 405 GHz  

Microsoft Academic Search

A explosão ocorrida no dia 25\\/08\\/2001 foi uma das mais intensas do presente ciclo solar em ondas de rádio de altas frequências. Foram medidas em ondas milimétricas e submilimétricas, aproximadamente, 105 e vários milhares de unidades de fluxo solar, respectivamente. Apresentamos um estudo deste evento em múltiplas frequências, desde microondas (1GHz), até ondas submilimétricas (405 GHz) detectadas pelo Telescópio Solar

J.-P. Raulin; V. Makhmutov; P. Kaufmann; A. A. Pacini; T. Luethi; H. S. Hudson; D. E. Gary; M. Yoshimori

2003-01-01

95

A UTILIZAÇÃO DOS SISTEMAS DE INFORMAÇÃO GEOGRÁFICA COMO AUXÍLIO PARA UMA FERTILIZAÇÃO MAIS RACIONAL  

Microsoft Academic Search

A utilização de matérias fertilizantes de forma pouco correcta, quer quantitativa quer qualitativamente, apresenta-se hoje em dia como uma das principais ameaças em termos ambientais aos ecossistemas agrícolas. De facto a aplicação de nutrientes sem ter em conta as existências no solo ou o potencial produtivo das culturas a que se destinam, conduz a aplicações por defeito ou por excesso

S. Dias; M. P. Rasquilha

96

The effect of praziquantel and Carica papaya seeds on Hymenolepis nana infection in mice using scanning electron microscope.  

PubMed

Hymenolepis nana (H. nana) is the most common tapeworm infection worldwide. It is more prevalent in warm climates where sanitation is poor, particularly among children. The effect and mechanism of action of praziquantel (PZQ), given at a dose of 25-mg/kg BW, and Carica papaya dried seed crude aqueous extract (CAE), given at a dose of 1.2-g/kg BW, were assessed on H. nana worms in experimentally infected mice. Tegumental changes were studied using the scanning electron microscope (SEM) and different parasitological parameters were observed. Each group of infected mice was divided into two subgroups. The first subgroup received either treatment before the 4th day after infection to investigate their effects on the cysticercoid stage. The other subgroup received treatments after the development of the adult stage, confirmed by eggs detection in stool. Both PZQ and C. papaya dried seed CAE resulted in a significant reduction of worm burden, total egg output and viable egg count. Marked tegumental changes were evident in adult worms treated with either treatment including shrinkage of the scolex and neck region with rostellar edema and complete loss of its hooks. However, all previous effects were exerted more rapidly in the case of PZQ treatment. They both significantly reduced cysticercoid stage size. Nevertheless, C. papaya outstand PZQ in having a deforming effect on adults arising from treated cysticercoids. It was concluded that C. papaya has significant anti-cestodal properties that enable its seed extract to be a very effective alternative to PZQ against H. nana. PMID:24849866

Abou Shady, Omayma M; Basyoni, Maha M A; Mahdy, Olfat A; Bocktor, Nardden Zakka

2014-08-01

97

Chemometric quality inspection control of pyrantel pamoate, febantel and praziquantel in veterinary tablets by mid infrared spectroscopy  

NASA Astrophysics Data System (ADS)

This paper describes the development and validation of a new multivariate calibration method based on diffuse reflectance mid infrared spectroscopy for direct and simultaneous determination of three veterinary pharmaceutical drugs, pyrantel pamoate, praziquantel and febantel, in commercial tablets. The best synergy interval partial least squares (siPLS) model was obtained by selecting three spectral regions, 3715-3150, 2865-2583, and 2298-1733 cm-1, preprocessed by first derivative and Savitzky-Golay smoothing followed by mean centering. This model was built with five latent variables and provided root mean square errors of prediction (RMSEP) equal or lower than 0.69 mg per 100 mg of powder for the three analytes. The method was validated according the appropriate regulations through the estimate of figures of merit, such as trueness, precision, linearity, analytical sensitivity, bias and residual prediction deviation (RPD). Then, it was applied to three different veterinary pharmaceutical formulations found in the Brazilian market, in a situation of multi-product calibration, since the excipient composition of these commercial products, which was not known a priori, was modeled by an experimental design that scanned the likely content range of the possible constituents. The results were verified with high performance liquid chromatography with diode array detection (HPLC-DAD) and high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) and were in agreement with the predicted values at 95% confidence level. The developed method presented the advantages of being simple, rapid, solvent free, and about ten times faster than the HPLC ones.

Piantavini, Mário S.; Pontes, Flávia L. D.; Uber, Caroline P.; Stremel, Dile P.; Sena, Marcelo M.; Pontarolo, Roberto

98

Chemometric quality inspection control of pyrantel pamoate, febantel and praziquantel in veterinary tablets by mid infrared spectroscopy.  

PubMed

This paper describes the development and validation of a new multivariate calibration method based on diffuse reflectance mid infrared spectroscopy for direct and simultaneous determination of three veterinary pharmaceutical drugs, pyrantel pamoate, praziquantel and febantel, in commercial tablets. The best synergy interval partial least squares (siPLS) model was obtained by selecting three spectral regions, 3715-3150, 2865-2583, and 2298-1733 cm(-1), preprocessed by first derivative and Savitzky-Golay smoothing followed by mean centering. This model was built with five latent variables and provided root mean square errors of prediction (RMSEP) equal or lower than 0.69 mg per 100 mg of powder for the three analytes. The method was validated according the appropriate regulations through the estimate of figures of merit, such as trueness, precision, linearity, analytical sensitivity, bias and residual prediction deviation (RPD). Then, it was applied to three different veterinary pharmaceutical formulations found in the Brazilian market, in a situation of multi-product calibration, since the excipient composition of these commercial products, which was not known a priori, was modeled by an experimental design that scanned the likely content range of the possible constituents. The results were verified with high performance liquid chromatography with diode array detection (HPLC-DAD) and high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) and were in agreement with the predicted values at 95% confidence level. The developed method presented the advantages of being simple, rapid, solvent free, and about ten times faster than the HPLC ones. PMID:24566119

Piantavini, Mário S; Pontes, Flávia L D; Uber, Caroline P; Stremel, Dile P; Sena, Marcelo M; Pontarolo, Roberto

2014-05-01

99

Chords: Em 022000 Em Em Em Em C C C C  

E-print Network

Verse 1 Chorus Verse 2 Chorus Verse 3 Chords: Em 022000 C 035553 G 320002 F 133211 Intro: Em Em Em Em C C C C Em Em Em Em C C C C Em Em Em Em C C C C Em Em Em Em C C C C Verse: Em Em Em Em C C C C G G G G G G G G Em Em Em Em C C C C G G G G G G G G Em Em Em Em C C C C G G G G G G G G Em Em Em Em C C

Reiners, Peter W.

100

· • Estudo baseado na teoria piagetiana sobre a fidelidade em dois contos de As Mil e uma Noites na versão de Galland 1 Study based on Piaget's theory about fidelity in two stories extracted from \\  

Microsoft Academic Search

Resumo: Caracteriza-se por um estudo teórico numa visão piagetiana sobre dois contos da coletânea As Mil e uma Noites na versão de Galland. O objetivo é analisar, nas narrativas, a virtude e a fidelidade, verificando se as relações entre os personagens são mantidas pelo amor, pelo respeito mútuo e relações de eqüidade ou pelo medo e obediência apresentado entre os

Luana Carramillo Going

101

Efficacy in cats of a novel topical combination of fipronil, (S)-methoprene, eprinomectin, praziquantel, against induced infestations of Echinococcus multilocularis.  

PubMed

Although foxes are the main reservoir of Echinococcus multilocularis, it is recognized that dogs and cats also may become infected. In cats the infection and egg production rates are usually low. Nevertheless, cats are a potential source of transmission of E. multilocularis. Due to the high human medical significance of E. multilocularis infection, it is important in endemic areas that owned cats are dewormed regularly. This paper presents the efficacy results of a new topical formulation, Broadline(®) (Merial) tested against E. multilocularis infection in cats. Two blinded laboratory studies were conducted to evaluate this novel topical combination of fipronil, (S)-methoprene, eprinomectin, and praziquantel against E. multilocularis. In each study, purpose-bred cats were assigned randomly to two treatment groups of 10 cats each: one untreated control group and one group treated at the minimum therapeutic dose of 0.12 mL/kg bodyweight to deliver 10mg fipronil, 12 mg (S)-methoprene, 0.5mg eprinomectin and 10mg praziquantel/kg bodyweight. The cats were inoculated orally with E. multilocularis protoscolices, 22 or 23 days before treatment. Based on necropsy and intestinal worm count, 8 or 11 days after treatment, the two studies confirmed 100% efficacy of Broadline(®) against adult E. multilocularis. PMID:24703072

Tielemans, Eric; Manavella, Coralie; Visser, Martin; Theodore Chester, S; Rosentel, Joseph

2014-04-28

102

[Comparison of the efficacy and safety of praziquantel administered in single dose of 40 versus 60 mg/kg for treating urinary schistosomiasis in Mauritania].  

PubMed

During the last twenty years, praziquantel (PZQ) was the drug of choice for the treatment of schistosomiasis in the majority of national programs. However, a lower rate of cure had been significantly noted on the left bank of the Senegal River. To explain this unusual rate of cure, the assumption of a possible resistance to the drug as well as under-dosing was considered. With an aim of testing this hypothesis of underdosing, we compared the amount of a single dose of 60 mg/kg of PZQ versus the standardized dose of 40 mg/kg used in curing urinary schistosomiasis in Mauritania. One hundred and fifty-one children aged from 10 to 19 years, including 77 in the group of 60 mg/kg and 74 in the group of 40 mg/ kg, were included in the study. The rates of cure were respectively 64.8% for 60 mg/kg and 67.5% for 40 mg/kg three weeks after the administration of the treatment without statistically significant difference. For the majority of the patients, the drug was well tolerated and no serious adverse events were noted; however, clinical signs in the form of abdominal pain associated or not with diarrhea and vomiting were noted. Praziquantel remains an effective and well-tolerated drug: the amount of 40 mg/kg of body weight can still be maintained for the treatment of schistosomiasis in Mauritania. PMID:23681759

Ouldabdallahi, M; Ousmane, B; Ouldbezeid, M; Mamadou, D; Konaté, L; Chitsulo, L

2013-08-01

103

A Minha Biblioteca uma empresa formada pelo consrcio  

E-print Network

livros acadêmicos do Brasil: #12;· As quatro editoras oferecem em uma única plataforma acesso online a um extenso acervo de livros técnicos, científicos e profissionais de qualidade reconhecida nacionalmente. · Através da plataforma Minha Biblioteca alunos e docentes terão acesso a mais de 5.030 livros de diversas

Floeter, Sergio Ricardo

104

Efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel against larval and adult stages of the cat lungworm, Aelurostrongylus abstrusus.  

PubMed

The efficacy of a novel topical combination of fipronil 8.3% w/v, (S)-methoprene 10% w/v, eprinomectin 0.4% w/v, and praziquantel 8.3% w/v (BROADLINE(®),(1) Merial) against larval and adult Aelurostrongylus abstrusus lungworms in cats was assessed in a controlled laboratory study. The study included 48 purpose-bred, short-haired cats which were each inoculated with 225 infective A. abstrusus larvae. The cats were formed into eight blocks based on pre-treatment bodyweight and were then, within each block, randomly allocated to one of six treatment groups: untreated control; treated once when A. abstrusus were expected to be third-stage larvae (4 days post inoculation [dpi]), fourth-stage larvae (7 dpi), immature adults (14 dpi) or adult nematodes (32 dpi), or treated twice, once when A. abstrusus were expected to be third-stage larval and once again when A. abstrusus were expected to be adult nematodes (4 dpi+32 dpi). Cats weighing ? 0.8-2.5 kg received one 0.3 mL applicator and cats weighing >2.5-7.5 kg received one 0.9 mL applicator. For determination of the efficacy of treatments, lungworm larval counts were established on faecal samples collected from all cats 32, 39, 46, 53 and 60 dpi. At each occasion from 46 dpi on, cats treated with fipronil, (S)-methoprene, eprinomectin and praziquantel had significantly lower A. abstrusus larval counts than the untreated controls with percentage reductions of 91.6% (cats treated 14dpi; P=0.012), ? 98.9% (cats treated either 4 dpi, 7 dpi or 32 dpi; P<0.001) or >99.9% (cats treated 4 dpi+32 dpi; P<0.001) at 60 dpi. Thus, the novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel was highly effective in the prevention and treatment of A. abstrusus lungworm infection in cats. PMID:24703080

Knaus, Martin; Chester, S Theodore; Rosentel, Joseph; Kühnert, Axel; Rehbein, Steffen

2014-04-28

105

Combination therapy using Pentostam and Praziquantel improves lesion healing and parasite resolution in BALB/c mice co-infected with Leishmania major and Schistosoma mansoni  

PubMed Central

Background Most natural host populations are exposed to a diversity of parasite communities and co-infection of hosts by multiple parasites is commonplace across a diverse range of systems. Co-infection with Leishmania major and Schistosoma mansoni may have important consequences for disease development, severity and transmission dynamics. Pentavalent antimonials and Praziquantel (PZQ) have been relied upon as a first line of treatment for Leishmania and Schistosoma infections respectively. However, it is not clear how combined therapy with the standard drugs will affect the host and parasite burden in concomitance. The aim of the current study was to determine the efficacy of combined chemotherapy using Pentostam and PZQ in BALB/c mice co-infected with L. major and S. mansoni. Methods The study used BALB/c mice infected with L. major and S. mansoni. A 3?×?4 factorial design with three parasite infection groups (Lm, Sm, Lm?+?Sm designated as groups infected with L. major, S. mansoni and L. major?+?S. mansoni, respectively) and four treatment regimens [P, PZQ, P?+?PZQ and PBS designating Pentostam®(GlaxoSmithKline UK), Praziquantel (Biltricide®, Bayer Ag. Leverkusen, Germany), Pentostam?+?Praziquantel and Phosphate buffered saline] as factors was applied. In each treatment group, there were 10 mice. Lesion development was monitored for 10 weeks. The parasite load, body weight, weight of the spleen and liver were determined between week 8 and week 10. Results Chemotherapy using the first line of treatment for L. major and S. mansoni reduced the lesion size and parasite loads but did not affect the growth response, spleen and liver. In the co-infected BALB/c mice, the use of Pentostam or PZQ did not result in any appreciable disease management. However, treatment with P?+?PZQ resulted in significantly (p?

2013-01-01

106

Uma Ferramenta de Monitoramento de Redes usando Sistemas Gerenciadores de Streams de Dados  

E-print Network

Uma Ferramenta de Monitoramento de Redes usando Sistemas Gerenciadores de Streams de Dados Natascha uma ferramenta gen´erica de monitoramento de redes utilizando um Sistema Gerenciador de Streams de¸~oes e topologias de rede, considerando tamb´em diver- sos objetivos de monitoramento. As medic¸~oes s

Hara, Carmem Satie

107

Uma Implementac~ao Concorrente de Redes Neurais PCA para Compress~ao de Imagens  

E-print Network

Uma Implementac¸~ao Concorrente de Redes Neurais PCA para Compress~ao de Imagens Willian Y. Honda1 dados. Considerando uma rede neural que aproxima os resultados da PCA cl´assica, a principal contribuic¸~ao deste trabalho consiste em apresentar um modelo de implementac¸~ao concorrente para essa rede. Um estudo

Pereira, Marcone Corrêa

108

A Gestão Estratégica das Instituições de Ensino Superior: uma contribuição ao melhor desempenho no caso brasileiro  

Microsoft Academic Search

Resumo: O crescimento no número de instituições de Ensino Superior no Brasil tem provocado inadequações, decorrentes da má gestão e do baixo comprometimento em relação à qualidade do processo educacional. O não alinhamento da educação superior com políticas de desenvolvimento e a falta de uma efetiva regulamentação institucional, no atendimento às demandas regionais, representam uma grave dispersão de esforços e

Alfredo Colenci Júnior; Ana Lúcia Spigolon; Marco Anselmo de Godoi; Maria Elizete Luz Sáes

109

Circuitos eltricos: novas e velhas tecnologias como facilitadoras de uma aprendizagem  

E-print Network

Circuitos elétricos: novas e velhas tecnologias como facilitadoras de uma aprendizagem Circuitos elétricos: novas e velhas tecnologias como facilitadoras de uma aprendizagem significativa também em tarefas extra classe foram utilizadas além de metodologias tradicionais recursos de tecnologia

dos Santos, C.A.

110

PROMETEUS FILOSOFIA EM REVISTA  

Microsoft Academic Search

Resumo: O uso heurístico do conceito de natureza é importante para os propósitos concernentes à ideia de uma história como palco para o desenvolvimento das disposições originárias do ser humano. Esse argumento torna possível falar do desenvolvimento ativo das disposições originárias do ser humano sem ferir o núcleo crítico que marca a filosofia kantiana em seu período áureo. Nosso argumento

VIVA VOX; João Roberto Barros II; Marcos Antonio da Silva

2010-01-01

111

Efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel against adult and larval stages of Toxocara cati in cats.  

PubMed

The efficacy of a novel topical combination of fipronil 8.3% (w/v), (S)-methoprene 10% (w/v), eprinomectin 0.4% (w/v), and praziquantel 8.3% (w/v) (BROADLINE(®), Merial) was evaluated against adult and larval Toxocara cati in four controlled studies. All studies included experimentally infected, purpose-bred, short-haired cats. In two studies, 22 or 20 cats harbouring patent infections as confirmed by pre-treatment faecal examination, were included. Within each study, cats were allocated to one of two groups: control or treated. In a further two studies, 30 cats were included in each; cats were allocated to one of three groups: control, treated when T. cati were expected to be either migrating third and/or fourth-stage larvae, or treated when T. cati were expected to be fourth-stage larvae. Cats allocated to the treated groups received a single topical application of the combination product at 0.12 mL/kg bodyweight (10mg fipronil+12 mg (S)-methoprene+0.5mg eprinomectin+10mg praziquantel per kg). For parasite recovery and count, cats were euthanized humanely at different intervals after treatment. In the studies targeting adult T. cati, ascarids were recovered from all controls (range 1-150) while only two worms were isolated from one treated cat. Thus, the efficacy of the novel combination was 99.4% and 100% against adult T. cati. For studies targeting larval T. cati, up to 21 worms were recovered from each of seven or eight of the control cats per study. No T. cati were recovered from the treated cats in two studies, corresponding to 100% efficacy against both, migrating third and/or fourth-stage larvae and luminal fourth-stage larvae. All cats accepted the treatment well and no adverse experiences or other health problems were observed throughout the studies. PMID:24703074

Knaus, Martin; Baker, Christine F; Reinemeyer, Craig R; Chester, S Theodore; Rosentel, Joseph; Rehbein, Steffen

2014-04-28

112

Efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel against experimental infections of Toxascaris leonina in cats.  

PubMed

The efficacy of a novel topical fipronil, (S)-methoprene, eprinomectin and praziquantel combination product (BROADLINE(®), Merial) was evaluated against adult Toxascaris leonina ascarids in experimentally infected cats in two controlled studies under an identical protocol. For each study, 30 nematode-naive, purpose-bred European Short Hair cats were inoculated orally with approximately 300 larvated T. leonina eggs. Twenty-two and 24 cats, respectively, that were shown to be positive for Toxascaris eggs by pre-treatment faecal examination were subsequently included in the two studies. In each study, the animals were allocated randomly to an untreated (control) group or to a treatment group. The treatment was a novel topical combination: fipronil (8.3%, w/v), (S)-methoprene (10%, w/v), eprinomectin (0.4% w/v) and praziquantel (8.3% w/v). Treatment was applied on Day 0 at 0.12 mL/kg bodyweight. For parasite recovery and count, cats were euthanized humanely seven days after treatment and necropsied. All untreated cats harboured adult T. leonina (range, 1-31 nematodes). The treatment provided a high level of efficacy against adult T. leonina in both studies (95.8% and 98.1%, respectively p<0.001). All cats accepted the treatment well based on hourly post-treatment observations for 4h and daily observations thereafter. No adverse experiences or other health problems were observed throughout the studies. Thus the data indicate that this novel combination product will provide a safe and effective treatment against T. leonina in cats. PMID:24703075

Knaus, Martin; Theodore Chester, S; Rosentel, Joseph; Visser, Martin; Rehbein, Steffen

2014-04-28

113

Efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel against feline urinary bladder worm (Capillaria plica) infection.  

PubMed

Infection with urinary capillarid bladder worms has been observed in cats worldwide. Although considered as generally causing no or little harm, infection with urinary capillarids may be associated with clinical disease which requires an appropriate treatment including the use of anthelmintics. Therefore, the efficacy of a novel topical combination formulation of fipronil 8.3% (w/v), (S)-methoprene 10% (w/v), eprinomectin 0.4% (w/v), and praziquantel 8.3% (w/v) (BROADLINE(®), Merial) was evaluated against urinary capillarids in naturally infected cats. Sixteen European Short Hair cats (5 male, 11 female) with capillarid eggs in their urine pre-treatment were included in the study. At the time of treatment, the cats were approximately ten months to eight years old and weighed 1.6-3.6 kg. Cats were ranked based on decreasing bodyweight and then randomly allocated within replicates of two animals to one of the treatment groups. Each cat in the treated group received one topical application of the combination product at the minimum therapeutic dose of 0.12 mL/kg body weight delivering 10mg fipronil+12 mg (S)-methoprene+0.5mg eprinomectin+10mg praziquantel per kilogram of body weight while the cats allocated to the control group remained untreated. For parasite recovery, identification and count, cats were euthanized humanely 14 days after treatment. All untreated cats harboured Capillaria plica in their urinary bladders (range 4-12), while no capillarids were recovered from the eight treated cats. Thus, the efficacy of the novel topical combination against C. plica was 100%. All cats accepted the treatment well based on post-treatment observations and daily observations thereafter. No adverse events or other health problems were observed during the study. PMID:24703076

Knaus, Martin; Shukullari, Enstela; Rosentel, Joseph; Rehbein, Steffen

2014-04-28

114

Evaluation of schistosoma mansoni morbidity one year after praziquantel treatment in rhino cAMP and obongi in west nile, Uganda.  

PubMed

An evaluation study on reversibility of Schistosoma mansoni induced periportal fibrosis (PF) morbidity following treatment with praziquantel, 40mg/kg body weight after one year, was carried out in Rhino Camp and Obongi all are West Nile districts in northern Uganda. To assess the reversibility of Schistosoma (S) mansoni induced PFs morbidity following treatment with praziquantel, 40mg/kg body weight after one year. The design was a Prospective cohorts study; and the setting was a busy canoe landing sites along Albert Nile in Schistosoma (S) mansoni hyperendemic areas of Rhino Camp and Obongi fishing village were selected for the study. Previously in 2005, 1562 people including fishermen and women, school pupils, teachers, and civil servants were studied in both fishing villages for S. mansoni using Kato/Katz stool smear method. Abdominal ultrasonography and sonomorphological abnormalities of periportal fibrosis were performed with Aloka portable ultrasound machine (Hellige, Freiburg, Germany) fitted with a convex probe of 3.5 mega Hertz was also performed in the field clinic on all patients who had S. mansoni eggs in their faeces. The sonomorphological abnormalities of periportal fibrosis were categorised and organomorphometry of liver and spleen was done. One thousand two hundred and seventy three 1273 (81.5%) patients in Rhino Camp and Obongi fishing villages were found to be excreting from 100 to ? 500 eggs per gram (epg) of faeces of S. mansoni eggs. Two hundred and eighty nine (18.5%) did not have eggs of S.mansoni in their faeces. All the 1273 patients secreting eggs of S.mansoni in their stool in Rhino Camp and Obongi fishing villages had abdominal ultrasonography and sonomorphological abnormalities of periportal fibrosis. Eight hundred and forty 840 (66%) although excreted S. mansoni eggs in their stool had Pf (0); Pf grade (I), n=259 (20.3%); Pf grade (II) n =147 (11.5%); and Pf grade (III) n=27 (2.1%) were observed. PMID:23878699

Odongo-Aginya, E I; Lakwo, T L; Doehring, Med Ekkehard

2010-01-01

115

Entrevista: " uma disciplina fundamental.  

E-print Network

fazer 70 anos e, embora vá continuar a fazer investigação, deixará de ser professor na Faculdade de- siva". � o mesmo adjectivo que usa para classificar o recrutamento para a guerra colonial, anos durante, em Lisboa, onde estudou sete anos. "Os professores de matemática não eram muito maus, nem muito bons

Instituto de Sistemas e Robotica

116

ALTERAÇÃO ESTRUTURAL DE UMA ÁREA FLORESTAL EXPLORADA CONVENCIONALMENTE NA BACIA DO PARAÍBA DO SUL, MINAS GERAIS, NOS DOMÍNIOS DE FLORESTA ATLÂNTICA 1  

Microsoft Academic Search

RESUMO - O presente estudo, realizado no município de Matias Barbosa,MG, na Fazenda Paciência, teve como objetivo avaliar as alterações estruturais ocorridas em uma Floresta Estacional Semidecidual, nos domínios de floresta Atlântica, em decorrência das atividades de exploração convencional de um plano de manejo. Para isso, foi utilizado um trecho contínuo de floresta que teve uma área explorada há seis

Ana Patrícia; Cota Gomes; Agostinho Lopes de Souza; João Augusto Alves; Meira Neto

2004-01-01

117

Uma Krishnaswami and International Imaginings  

ERIC Educational Resources Information Center

This article presents an interview with South Asian children's book and young adult fiction writer, Uma Krishnaswami. The interviewer states that "in all her creative endeavors Uma's keen sense of detail, narrative voice, and characterization complicate and humanize portrayals of multicultural peoples worldwide." In this interview, Krishnaswami…

Aldama, Frederick Luis

2006-01-01

118

Populações estelares em galáxias HII  

NASA Astrophysics Data System (ADS)

Analisamos o conteúdo estelar de 74 galáxias HII a partir do contínuo observado nos espectros ópticos dessas galáxias, utilizando métodos de síntese de população estelar. Descobrimos que todas as galáxias para as quais encontramos soluções contêm uma população estelar velha que domina a massa estelar, e numa maioria dessas também encontramos evidência de uma população de idade intermediaria além da geração jovem que está se formando agora. Concluímos que a formação estelar dessas galáxias se realiza em surtos individuais, Esses surtos são interrompidos por longos períodos de inatividade, com os primeiros consumindo a maior parte do gás. Sugerimos, portanto, que as galáxias HII sejam galáxias anãs normais flagradas em um período de surto.

Westera, P.; Cuisinier, F.; Telles, E.; Kehrig, C.

2003-08-01

119

Suporte para vistas em ambientes de gesto de rede Palavras chave: Vistas, Gesto de Rede, CRC2000.  

E-print Network

1 Suporte para vistas em ambientes de gestão de rede Palavras chave: Vistas, Gestão de Rede, CRC2000. Resumo Em sistemas de gestão de redes, uma vista representa uma perspectiva parcelar do universo sistema Scotty, uma conhecida plataforma de gestão de rede de domínio público. I. Introdução A grande

Rodrigues, Luís E.T.

120

Astronomia cultural e meio ambiente segundo uma abordagem holística  

NASA Astrophysics Data System (ADS)

Neste trabalho ampliamos a discussão da abordagem holística para o ensino de astronomia que temos desenvolvido nos últimos anos, analisamos novos resultados e apresentamos exemplos práticos para interessados em experimentá-la. A constatação básica a orientar este enfoque é que cursos introdutórios em astronomia costumam ser excessiva e prematuramente técnicos, além de assumirem uma visão tradicional, muito estreita, do que seja educação científica, herdada da era cartesiana e positivista da ciência. Fundamentamos porque é importante que elementos de astronomia cultural ofereçam o mote e constituam o eixo norteador daqueles cursos e porque é urgente revermos a visão que temos da relação entre astronomia e meio ambiente. Um ponto central nesta abordagem é explorar formas de reativar e atualizar uma relação orgânica com o meio e excitar a consciência de nossa inevitável e profunda interdependência com ele em nível cósmico. Neste trabalho exemplificamos a possibilidade de concretização desta proposta em três diferentes situações: disciplinas de cursos de licenciatura em geografia e em física; escolas de nível fundamental; e, neste caso ainda a ser implementada, comunidades carentes. Estes casos envolvem públicos e espaços diferenciados para educação formal e não-formal. Dos casos já implementados, destacamos os resultados alcançados pelos alunos: enriquecimento cultural, aprendizagem significativa de conteúdos astronômicos tradicionais; mudanças de comportamento, incorporando contato diário com o céu; e freqüentes vivências de sentimentos empáticos que redirecionam a relação com a natureza e a consciência ecológica global. Além disto, para interessados em aplicar esta proposta, também socializamos procedimentos e cuidados para a implementação de ações alternativas consonantes com a mesma. (PPGECNM/UFRN; PRONEX/FINEP; NUPA/USP; Temáticos/FAPESP)

Jafelice, L. C.

2003-08-01

121

NANOTUBOS DE CARBONO COM DUAS-CAMADAS USANDO UMA FORMULAÇÃO NÃO-LOCAL E A RESPOSTA IMPULSO  

Microsoft Academic Search

Neste trabalho, o modelo de Euler-Bernoulli para vigas é estendido para incluir o efeito elástico não local para nano tu- bos de carbono com duas-camadas, (DWNTs). Também é considerado o efeito das forças de interações elásticas de van der Walls. O problema de autovalor acoplado é formulado em termos de uma base composta pela solução fundamental de uma equação diferencial

Rosemaira Dalcin Copetti; Julio R. Claeyssen; Teresa Tsukazan

2008-01-01

122

A randomised controlled clinical trial on the safety of co-administration of albendazole, ivermectin and praziquantel in infected schoolchildren in Uganda.  

PubMed

Integrated chemotherapy of neglected tropical diseases (NTD) through mass drug administration given as a single dose would increase treatment coverage and cost-effectiveness. This study reports on the safety of a combination of albendazole, ivermectin and praziquantel in the treatment of lymphatic filariasis (LF), schistosomiasis and soil-transmitted helminthiasis (STH) in infected children. In this randomised, controlled, single-blinded clinical trial conducted in 235 primary school children aged 5-18 years in Yumbe District in Northern Uganda, the triple combination therapy was compared with the current NTD programme regimen. Liver function testing was performed for all children who received combined therapy. The study included 48 children with LF alone, 60 children with schistosomiasis (Schistosoma mansoni), 41 children with STH, 49 children with schistosomiasis + LF and 37 children with all three types of infection. Children were closely monitored by a paediatrician for any adverse reactions for 7 days. No serious adverse events were experienced. However, 4 of 18 children in the test group and 2 of 3 children in the control group who did not report any ill conditions before treatment developed adverse drug reactions. The combined and conventional therapies were found to be equally safe. The efficacies of both therapies were comparable and satisfactory. [ClinicalTrials.gov identifier: NCT01050517]. PMID:21353271

Namwanje, Harriet; Kabatereine, Narcis; Olsen, Annette

2011-04-01

123

Efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin, and praziquantel, against the ticks, Ixodes ricinus and Ixodes scapularis, on cats.  

PubMed

Five controlled, blinded and randomized studies were conducted to examine the efficacy of a single topical application of a combination of fipronil, (S)-methoprene, eprinomectin, and praziquantel (BROADLINE(®), Merial) against induced infestations with Ixodes ticks on cats. Three studies investigated the efficacy against Ixodes ricinus and two against Ixodes scapularis. In each study, purpose-bred cats were assigned at random to an untreated group or to a treated group. For the studies using I. ricinus, cats were infested with 50 female ticks and a similar number of males 2 days before treatment application, and weekly afterwards on between four and six occasions. For the studies using I. scapularis, cats were infested with a total of 50 ticks (approximately 25 females and 25 males) according to the same schedule as for I. ricinus. Tick counts for the evaluation of efficacy were performed 48 h after treatment and 48 h after the subsequent weekly infestations. Weekly attachment rates to untreated cats of at least 29% for I. ricinus and at least 30% for I. scapularis demonstrated consistently that the ticks were vigorous and that the attachment rates were adequate for efficacy evaluation. In the I. ricinus studies, an efficacy of at least 93% was demonstrated for up to 37 days after the treatment. In the I. scapularis studies, the efficacy level was at least 95% 30 days after the treatment. The product was well tolerated and caused no adverse reaction. PMID:24703079

Tielemans, E; Prullage, J; Knaus, M; Visser, M; Manavella, C; Chester, S T; Young, David; Everett, William R; Rosentel, J

2014-04-28

124

Efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel against induced infections of Ancylostoma spp. nematodes of cats.  

PubMed

Four studies were conducted to examine the efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin, and praziquantel (BROADLINE(®), Merial) against Ancylostoma tubaeforme and Ancylostoma braziliense hookworms of cats. In each study, purpose-bred cats were randomly assigned to treatment groups of 10 or 12 cats per group. In three studies the cats were inoculated with A. tubaeforme and in one study with A. braziliense. The inoculations were undertaken on a schedule which resulted in the hookworms reaching the fourth larval stage in two of the studies, or the adult stage in four of the studies, by the day of treatment. In each study there was also an untreated control and 1 or 2 groups treated with the novel combination. In the two studies where efficacy against the fourth larval stage of A. tubaeforme was tested, the efficacy recorded was 100%. In the three studies where efficacy against the adult stage of A. tubaeforme was tested, efficacy of 100% was also confirmed. In the study where efficacy against the adult stage of A. braziliense was tested efficacy was 99.5%. PMID:24703073

Prullage, Joseph B; Knaus, Martin; Bowman, Dwight D; Chester, S Theodore; Visser, Martin; Rehbein, Steffen; Rosentel, Joseph

2014-04-28

125

Closing the praziquantel treatment gap: new steps in epidemiological monitoring and control of schistosomiasis in African infants and preschool-aged children  

PubMed Central

SUMMARY Where very young children come into contact with water containing schistosome cercariae, infections occur and schistosomiasis can be found. In high transmission environments, where mothers daily bathe their children with environmentally drawn water, many infants and preschool-aged children have schistosomiasis. This ‘new’ burden, inclusive of co-infections with Schistosoma haematobium and Schistosoma mansoni, is being formally explored as infected children are not presently targeted to receive praziquantel (PZQ) within current preventive chemotherapy campaigns. Thus an important PZQ treatment gap exists whereby infected children might wait up to 4–5 years before receiving first treatment in school. International treatment guidelines, set within national treatment platforms, are presently being modified to provide earlier access to medication(s). Although detailed pharmacokinetic studies are needed, to facilitate pragmatic dosing in the field, an extended ‘dose pole’ has been devised and epidemiological monitoring has shown that administration of PZQ (40 mg/kg), in either crushed tablet or liquid suspension, is both safe and effective in this younger age-class; drug efficacy, however, against S. mansoni appears to diminish after repeated rounds of treatment. Thus use of PZQ should be combined with appropriate health education/water hygiene improvements for both child and mother to bring forth a more enduring solution. PMID:21861945

STOTHARD, J. RUSSELL; SOUSA-FIGUEIREDO, JOSÉ C.; BETSON, MARTHA; GREEN, HELEN K.; SETO, EDMUND Y. W.; GARBA, AMADOU; SACKO, MOUSSA; MUTAPI, FRANCISCA; VAZ NERY, SUSANA; AMIN, MUTAMAD A.; MUTUMBA-NAKALEMBE, MARGARET; NAVARATNAM, ANNALAN; FENWICK, ALAN; KABATEREINE, NARCIS B.; GABRIELLI, ALBIS F.; MONTRESOR, ANTONIO

2011-01-01

126

Murine cysticercosis model: influence of the infection time and the time of treatment on the cysticidal efficacy of albendazole and praziquantel.  

PubMed

In the search of new alternatives for neurocysticercosis treatment, Taenia crassiceps ORF strain cysticerci have been used instead of T.?solium for in vitro studies. Up to date, the main criteria for the use of the murine cysticercosis model for drug efficacy evaluation have not been assessed. The aim of the present study was to evaluate the influence of two of the main variables related to the in vivo efficacy: the length of drug treatment and the starting time of treatment after experimental infection, using albendazole (ABZ) and praziquantel (PZQ) as test drugs. Additionally, the relationship between the number of cysts and the parasite weight was assessed. For the study, female BALB/c mice were experimentally infected with T.?crassiceps cysts. Three different post-infection periods (10, 20 and 30 days) and three different lengths of treatment with ABZ or PZQ (10, 20 and 30 days) were selected. The efficacy of each treatment was evaluated by comparison with a control group. Our results show that for in vivo efficacy studies, the best time to start the drug treatment is 10 days post-infection and that a minimum of 20 days of treatment is required when ABZ or PZQ are used as positive control. Moreover, in this model the parasite weight can be used as a rapid tool to measure the in vivo drug activity. PMID:25500213

Palomares-Alonso, Francisca; Palencia Hernández, Guadalupe; Rojas-Tomé, Irma Susana; Jung-Cook, Helgi; Pinzón-Estrada, Enrique

2015-02-01

127

Marvin, robô construtor para competição em robótica móvel  

Microsoft Academic Search

renatohsp@gmail .com Resumo: Este artigo é sobre a construção do robô autônomo Marvin o Construtor, que foi construído para participar da IV Competição IEEE Brasileira de Robô. A tarefa consiste em empilhar blocos em uma área predeterminada em um menor tempo possível, ganha a torre mais alta. O robô, construído por alunos do Instituto Tecnológico de Aeronáutica (ITA), foi construído

André Martin Narciso; Carlos Augusto; Bentes da Silva; Jackson Paul Matsuura

128

A School-Based Cross-Sectional Survey of Adverse Events following Co-Administration of Albendazole and Praziquantel for Preventive Chemotherapy against Urogenital Schistosomiasis and Soil-Transmitted Helminthiasis in Kwale County, Kenya  

PubMed Central

Background Soil-transmitted helminths and schistosomiasis are mostly prevalent in developing countries due to poor sanitation and lack of adequate clean water. School-age children tend to be the target of chemotherapy-based control programmes because they carry the heaviest worm and egg burdens. The present study examines adverse events (AEs) experienced following co-administration of albendazole and praziquantel to school-age children in a rural area in Kwale County, Kenya. Methods Children were treated with single doses of albendazole and praziquantel tablets and then interviewed using a questionnaire for post treatment AEs. Results Overall, 752 children, 47.6% boys, participated in the study. Their median (interquartile range) age was 12.0 (10.0–14.0) years. A total of 190 (25.3%) children reportedly experienced at least one AE. In total, 239 cases of AEs were reported with the most frequent being abdominal pains (46.3%), dizziness (33.2%) and nausea (21.1%). Majority of the reported AEs (80.8%) resolved themselves while 12.1% and 6.3% were countered by, respectively, self-medication and visiting a nearby health facility. More girls (60.5%) than boys (39.5%) reported AEs (P?=?0.027). Conclusions The AEs were mild and transient, and were no worse than those expected following monotherapy. The current study adds to the evidence base that dual administration of albendazole and praziquantel in school-based mass drug administration is safe with only mild adverse events noted. PMID:24520365

Njenga, Sammy M.; Ng’ang’a, Paul M.; Mwanje, Mariam T.; Bendera, Fatuma S.; Bockarie, Moses J.

2014-01-01

129

Establishing the Empirical Relationship Between Non-Science Majoring Undergraduate Learners' Spatial Thinking Skills and Their Conceptual Astronomy Knowledge. (Spanish Title: Estableciendo Una Relación Empírica Entre el Razonamiento Espacial de los Estudiantes de Graduación de Carreras no Científicas y su Conocimento Conceptual de la Astronomía.) Estabelecendo Uma Relação Empírica Entre o RacioCínio Espacial dos Estudantes de Graduação EM Carreiras Não Científicas e Seu Conhecimento Conceitual da Astronomia  

NASA Astrophysics Data System (ADS)

The astronomy education community has tacitly assumed that learning astronomy is a conceptual domain resting upon spatial thinking skills. As a first step to formally identify an empirical relationship, undergraduate students in a non-major introductory astronomy survey class at a mediumsized, Ph.D. granting, mid-western US university were given pre- and post-astronomy conceptual diagnostics and spatial reasoning diagnostics, Instruments used were the "Test Of Astronomy Standards" and "What Do You Know?" Using only fully matched data for analysis, our sample consisted of 86 undergraduate non-science majors. Students' normalized gains for astronomy surveys were low at .26 and .13 respectively. Students' spatial thinking was measured using an instrument designed specifically for this study. Correlations between the astronomy instruments' pre- to post-course gain scores and the spatial assessment instrument show moderate to strong relationships suggesting the relationship between spatial reasoning and astronomy ability can explain about 25% of the variation in student achievement. La comunidad de educación en astronomía ha supuesto de forma tácita que el aprendizaje de la astronomía consiste en un dominio conceptual fundamentado en el razonamiento espacial. Como un primer paso para identificar formalmente una relación empírica entre estas dos cosas, utilizamos como muestra los estudantes de graduación de carreras no científicas de un curso experimental en una universidad norteamericana del medioeste de porte mediano con programa de Doctorado em curso, en el cual estos estudiantes se sometieron a un diagnóstico de razonamiento espacial y conceptos astronómicos antes e después del mismo. Las herramientas utilizadas fueron el Test Of Astronomy Standards (TOAST) y el cuestionario What do you know? Utilizando solo los datos completamente consistentes para este análisis, nuestra muestra consistió en 86 estudantes de graduación. Las mejoras, depués de normalizadas, en el desempeño de los estudiantes en estos dos asuntos foram pequenas, 0.26 e 0.13 respectivamente. El razonamiento espacial de los estudiantes fue medido utilizando un instrumento específico desarrollado para este trabaljo. Las correlaciones entre los resultados de los tests astronómicos y este instrumento específico, antes y después del curso mostraron una relación entre moderada y fuerte, sugiriendo que la relación entre el razonamiento espacial y el conocimiento astronómico puede explicar hasta un 25% de la variación em el desempeño de los estudiantes. A comunidade da educação em astronomia tem suposto de forma implícita que o aprendizado da astronomia consiste em um domínio conceitual fundamentado no raciocínio espacial. Como um primeiro passo para identificar formalmente uma relação empírica entre estas duas coisas, utilizamos como amostra os estudantes de graduação de carreiras não científicas de um curso exploratório em uma universidade norte-americana do meio-oeste de médio porte com programa de Doutorado em andamento, onde estes estudantes foram submetidos a um diagnóstico de raciocino espacial e conceitos astronômicos antes e depois do mesmo. As ferramentas utilizadas foram o Test Of Astronomy Standards (TOAST) e o questionário What do you know? Utilizando somente dados completamente consistentes para esta análise, nossa amostra consistiu de 86 estudantes de graduação. As melhoras, depois de normalizadas, do desempenho dos estudantes nos dois quesitos foram pequenas, 0.26 e 0.13 respectivamente. O raciocínio espacial dos estudantes foi medido utilizando um instrumento específico desenhado para este trabalho. As correlações entre os resultados dos testes astronômicos e este instrumento específico antes e depois do curso mostraram uma relação entre moderada e forte, sugerindo que a relação entre o raciocínio espacial e o conhecimento astronômico pode explicar até um 25% na variação no desempenho dos estudantes.

Heyer, Inge; Slater, Stephanie J.; Slater, Timothy F.

2013-12-01

130

Factors associated with coverage of praziquantel for schistosomiasis control in the community-direct intervention (CDI) approach in Mali (West Africa)  

PubMed Central

Background Despite the progress made in the control of Neglected Tropical Diseases (NTD), schistosome and soil-transmitted helminth infections are far from being effectively managed in many parts of the world. Chemotherapy, the key element of all control strategies, is faced with some difficulties in terms of access to treatment. Our study aims to describe the factors involved in the success or failure of the community-directed intervention (CDI) approach through control programmes, which aims to achieve consistent high coverage at affordable and sustainable costs in endemic areas. Methods The CDI approach was carried out from December 2007 to October 2008 in ten villages of the district of Diéma, Mali. At inclusion, each child part of the study’s sample was interviewed and submitted for a physical examination. The study focused on: data collection, treatment of the eligible population, evaluation of the treatment coverage, performance of community drug distributors (CDDs), and the involvement and perception of populations. Results A total of 8,022 eligible people were studied with a mean coverage rate of 76.7%. Using multiple regression, it was determined that receiving praziquantel as treatment was associated with five factors: belonging to the Fulani or Moorish ethnic minority versus the Bambara/Soninke, use of the central versus the house-to-house drug distribution mode, the ratio of the population to the number of CDDs, the lack of supervision and belonging to the age group of 15 years or above (p<0.05). As well as that, it was found that the presence of parallel community-based programmes (HIV, tuberculosis) that provide financial incentives for community members discouraged many CDDs (who in most cases are volunteers) to participate in the CDI approach due to a lack of incentives. Conclusions The findings indicate that the success of the CDI approach depends on, amongst other things, the personal characteristics of the respondents, as well as on community factors. PMID:23849481

2013-01-01

131

Efficacy of praziquantel in the treatment of Schistosoma haematobium infection among school-age children in rural communities of Abeokuta, Nigeria  

PubMed Central

Background Chemotherapy with praziquantel (PZQ) has been the cornerstone of schistosomiasis control over the last two decades. Being the only available drug for the treatment of over 200 million people worldwide, continuous monitoring of PZQ efficacy under the pressure of widespread use is therefore advocated. Methods The efficacy of taking two doses of oral PZQ for the treatment of Schistosoma haematobium was examined among school children in Nigeria. Urine specimens were collected from 350 school children and examined using the filtration technique. Blood was collected for packed cell volume (PCV) estimation, and the weight and height of each child were estimated. S. haematobium egg positive pupils were treated with two oral doses of PZQ at 40 mg/kg with a four-week interval in between. Drug efficacy was determined based on the egg reduction rate (ERR). Results Among 350 school children, 245 (70.0%) – of which 132 were males and 113 were females, with an age range of 4 to 15 years – were diagnosed with S. haematobium. All the 245 infected children received a single oral dose of 40 mg/kg PZQ twice with a four-week interval in between and were followed up for 12 weeks. At four, eight and twelve weeks post treatment, the ERR was 57.1%, 77.6% and 100%, respectively. The ERR was significantly higher among the children with a light infection compared to those with a heavy infection. One hundred and twenty-one children were egg negative at four weeks post treatment, among which 1 (6.3) and 120 (52.4%) had heavy and light infections, respectively. Following the second round of treatment, the cure rate at eight weeks and twelve weeks was 85.3% and 100%, respectively. Conclusion This study demonstrated the efficacy of taking two doses of oral PZQ for the treatment of urinary schistosomiasis among school children in Nigeria. PMID:25215186

2014-01-01

132

Efficacy of a novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel against adult and immature stages of the cat flea (Ctenocephalides felis) on cats.  

PubMed

The efficacy of a novel topical combination of fipronil 8.3% (w/v), (S)-methoprene 10% (w/v), eprinomectin 0.4% (w/v) and praziquantel 8.3% (w/v) (BROADLINE(®)) was tested against adult and immature stages of Ctenocephalides felis fleas in six studies. For that purpose, fleas from different colonies from North America, Germany and South Africa were used to induce infestations in cats under laboratory conditions. In each study, between 12 and 16 cats were allocated randomly to 2 groups. Cats in Group 1 were not treated and served as controls. Cats in Group 2 were treated once on Day 0 with BROADLINE(®) at the minimum recommended dosage of 0.12 mg/kg body weight. In 4 studies, all animals were infested experimentally with unfed C. felis (100 ± 5) on Days 2 (or 1), 7, 14, 21, 28 and 35. Live fleas were counted 24h post-treatment or infestation. In 2 additional studies, animals were infested at the same frequency with gravid C. felis fleas (100 ± 5) that were fed previously on an untreated host. Forty-eight hours post-infestation, flea eggs were collected, counted and incubated for the evaluation of the reduction of emergence of adults. The combined curative efficacy against adult fleas at 24h after treatment was 94.3% and the combined preventive efficacy values remained greater than 95.9% at 24h after 5 subsequent weekly infestations. In addition, the product reduced dramatically the emergence of new adult fleas for at least 5 weeks (>98.1% for one month and 93.2% at 5 weeks after infestation), demonstrating its efficiency in preventing environmental contamination by immature stages. PMID:24703078

Baker, Christine; Tielemans, Eric; Prullage, Joseph B; Chester, S Theodore; Knaus, Martin; Rehbein, Steffen; Fourie, Josephus J; Young, David R; Everett, William R; Rosentel, Joseph K

2014-04-28

133

Preventive efficacy of a topical combination of fipronil – (S)-methoprene – eprinomectin – praziquantel against ear mite (Otodectes cynotis) infestation of cats through a natural infestation model  

PubMed Central

A study based on naturally infested cats was designed to evaluate the effectiveness of a single treatment with a topical formulation containing fipronil, (S)-methoprene, eprinomectin and praziquantel, for the prevention of Otodectes cynotis infestation in cats. Six treated cats and six untreated cats were housed with three chronically Otodectes cynotis-infested cats, respectively. The cats of each group were kept together in a 20-m2 room for 1 month. Both clinical examination and ear mite counts were conducted on Day 28. All donor cats were confirmed to be chronically infested with Otodectes cynotis on Day ?1 and Day 28. From untreated control cats, 129 live mites were recovered on Day 28 and all cats were found to be infested. In the treated group, three cats were found to be infested, with a total of five live mites recovered, the difference between the two groups being significant (p = 0.003). One treatment corresponded to 96% preventive efficacy at Day 28 based on ear mite counts. With regard to cerumen, the clinical score increased significantly for untreated cats between Day ?1 and Day 28 (p = 0.00026) and not for treated cats (p = 0.30). The difference in cerumen abundance was significant between untreated and treated cats on Day 28 (p = 0.0035). Concerning the pruritic reflex in at least one ear, all cats were negative at inclusion. All six untreated cats became positive and showed a reflex on Day 28, whereas no treated cat showed ear pruritus (p = 0.00026). PMID:25148648

Beugnet, Frédéric; Bouhsira, Émilie; Halos, Lénaïg; Franc, Michel

2014-01-01

134

Preventive efficacy of a topical combination of fipronil--(S)-methoprene--eprinomectin--praziquantel against ear mite (Otodectes cynotis) infestation of cats through a natural infestation model.  

PubMed

A study based on naturally infested cats was designed to evaluate the effectiveness of a single treatment with a topical formulation containing fipronil, (S)-methoprene, eprinomectin and praziquantel, for the prevention of Otodectes cynotis infestation in cats. Six treated cats and six untreated cats were housed with three chronically Otodectes cynotis-infested cats, respectively. The cats of each group were kept together in a 20-m(2) room for 1 month. Both clinical examination and ear mite counts were conducted on Day 28. All donor cats were confirmed to be chronically infested with Otodectes cynotis on Day -1 and Day 28. From untreated control cats, 129 live mites were recovered on Day 28 and all cats were found to be infested. In the treated group, three cats were found to be infested, with a total of five live mites recovered, the difference between the two groups being significant (p = 0.003). One treatment corresponded to 96% preventive efficacy at Day 28 based on ear mite counts. With regard to cerumen, the clinical score increased significantly for untreated cats between Day -1 and Day 28 (p = 0.00026) and not for treated cats (p = 0.30). The difference in cerumen abundance was significant between untreated and treated cats on Day 28 (p = 0.0035). Concerning the pruritic reflex in at least one ear, all cats were negative at inclusion. All six untreated cats became positive and showed a reflex on Day 28, whereas no treated cat showed ear pruritus (p = 0.00026). PMID:25148648

Beugnet, Frédéric; Bouhsira, Emilie; Halos, Lénaïg; Franc, Michel

2014-01-01

135

Comparative in vivo antioxidant levels in Schistosoma mansoni infected mice treated with praziquantel or the essential oil of Melaleuca armillaris leaves.  

PubMed

Plant extracts are continuously investigated for their extensive inclusion of biologically active constituents that exert therapeutic activities against many diseases. The aim of this study was to assess the antioxidant/anti-schistosomal activities of the essential oil of the fresh leaves of Melaleuca armillaris (M. armillaris) compared to Praziquantel (PZQ) on normal and Schistosoma mansoni-infected mice. The oil was isolated by hydrodistillation and analyzed by gas chromatography/mass spectrometry (GC/MS). The oil was rich in 1,8-cineole (33.93%), terpinen-4-ol (18.79%), limonene (10.37%) and B-pinene (6.59%). M. armillaris oil (150 mg kg(-1), orally) was administered from the second week post infection twice per week for six weeks. PZQ (500 mg kg(-1), orally) was administered for two successive days 8 weeks post infection and mice sacrificed one week later. Total protein, Malondialdehyde (MDA), Glutathione (GSH), vitamins C and E, the antioxidant enzymes catalase and superoxide dismutase, as well as liver weights and liver/body weight were determined in the liver tissues. Results showed that, both treatments significantly ameliorated the disturbed levels ofGSH and MDA in infected mice. Both vitamins were significantly elevated after treatment with the oil while a significant increase in catalase accompanied by a pronounced decrease in SOD were obtained after treatment with PZQ. Both treatments markedly improved liver and body weights in infected mice compared to the infected-untreated ones. In conclusion, natural plant sources may be used as promising alternative agents to chemical drugs for schistosomiasis treatment, since the latter may result in drug-induced resistance arising from repeated use. PMID:24199475

Rizk, M; Ibrahim, N; El-Rigal, N

2012-10-15

136

A Latent Markov Modelling Approach to the Evaluation of Circulating Cathodic Antigen Strips for Schistosomiasis Diagnosis Pre- and Post-Praziquantel Treatment in Uganda  

PubMed Central

Regular treatment with praziquantel (PZQ) is the strategy for human schistosomiasis control aiming to prevent morbidity in later life. With the recent resolution on schistosomiasis elimination by the 65th World Health Assembly, appropriate diagnostic tools to inform interventions are keys to their success. We present a discrete Markov chains modelling framework that deals with the longitudinal study design and the measurement error in the diagnostic methods under study. A longitudinal detailed dataset from Uganda, in which one or two doses of PZQ treatment were provided, was analyzed through Latent Markov Models (LMMs). The aim was to evaluate the diagnostic accuracy of Circulating Cathodic Antigen (CCA) and of double Kato-Katz (KK) faecal slides over three consecutive days for Schistosoma mansoni infection simultaneously by age group at baseline and at two follow-up times post treatment. Diagnostic test sensitivities and specificities and the true underlying infection prevalence over time as well as the probabilities of transitions between infected and uninfected states are provided. The estimated transition probability matrices provide parsimonious yet important insights into the re-infection and cure rates in the two age groups. We show that the CCA diagnostic performance remained constant after PZQ treatment and that this test was overall more sensitive but less specific than single-day double KK for the diagnosis of S. mansoni infection. The probability of clearing infection from baseline to 9 weeks was higher among those who received two PZQ doses compared to one PZQ dose for both age groups, with much higher re-infection rates among children compared to adolescents and adults. We recommend LMMs as a useful methodology for monitoring and evaluation and treatment decision research as well as CCA for mapping surveys of S. mansoni infection, although additional diagnostic tools should be incorporated in schistosomiasis elimination programs. PMID:24367250

Koukounari, Artemis; Donnelly, Christl A.; Moustaki, Irini; Tukahebwa, Edridah M.; Kabatereine, Narcis B.; Wilson, Shona; Webster, Joanne P.; Deelder, André M.; Vennervald, Birgitte J.; van Dam, Govert J.

2013-01-01

137

Atendimento odontológico em gestantes: uma revisão da literatura  

Microsoft Academic Search

Many professionals of the odontological area have demonstrated concern in demystifying the popular belief, still today sufficiently common, from that pregnant woman cannot receive assistance odontological. However, still he has refusal on the part of some surgeon-dentists in giving to odontological attention the pregnant, had the controversies of opinions and deficient boarding of the subject during the academic formation, as

Vanessa Ceolin Poletto; Priscila Stona; João Batista; Blessmann Weber; Angélica Maria Genehr Fritscher

2008-01-01

138

O MÉTODO PROJETUAL DE ANDREA PALLADIO UMA IMPLEMENTAÇÃO EM VBA  

Microsoft Academic Search

The aim of the present research was to study the algorithmic aspects of Palladio's design method. In the first phase of the research the different methods for calculating room proportions, proposed by Palladio in I Quattro Libri dell'Archittetura, were studied. Next, an application for AutoCAD was developed in VBA for automatically generating 3D representations of all the possible combinations of

Gabriela Celani; Bianca Tiemi Kubagawa

139

Uma análise do fenômeno “alternância de línguas” na fala de bilíngues intermodais (Libras e Português)  

PubMed Central

Um interessante fenômeno lingüístico presente nas interações das pessoas bilíngues é a alternância de línguas. Neste trabalho, estamos investigando a alternância entre a língua portuguesa oral e a língua de sinais brasileira – Libras, numa mesma cadeia enunciativa, com o objetivo de identificar e analisar o uso dessa alternância na fala de uma criança e de um adulto (ambos ouvintes, filhos de pais surdos), interagindo em uma situação de bilinguismo intermodal, com interlocutores surdos e ouvintes. A alternância de línguas, nesse caso, ocorre quando se para de falar em português e se alterna para sinalizar. O presente trabalho se caracteriza como um estudo inicial, com análise qualitativa de dados. Fazem parte do nosso corpus nove sessões de interações em Libras e em português oral, gravadas em vídeo, que fazem parte do Projeto Desenvolvimento Bilíngue Bimodal da UFSC. Os dados revelam que as características da alternância de línguas pelo adulto e pela criança parecem ter semelhanças e diferenças. O sujeito adulto parece ter feito um uso da alternância mais preocupado com o curso da interação. A criança, por sua vez, não parece tê-la usado com propósitos pragmáticos específicos. Quanto à extensão das alternâncias, pode-se perceber que tanto a criança quanto o adulto utilizaram enunciados maiores do que uma única palavra isolada. O papel dos interlocutores parece ter sido decisivo nas interações aqui investigadas – especialmente nas do adulto, já que a criança ainda está em processo de tomada de consciência do papel do interlocutor na interação. PMID:24379831

de Sousa, Aline Nunes; de Quadros, Ronice Müller

2013-01-01

140

ISSN 0103-9741 Monografias em Cincia da Computao  

E-print Network

suscetibilidade, isto é, mapas que indi- cam localizações com riscos de deslizamento em uma dada área e que usa o é demonstrado por um estudo de caso onde o sistema possui a responsabilidade de gerar mapas de

Endler, Markus

141

A verdade na biomedicina, reações adversas e efeitos colaterais: uma reflexão introdutória  

Microsoft Academic Search

RESUMO Apresenta-se uma reflexão sobre a construção e uso das verdades biomédicas, contextualizada no ambiente da atividade clínica, e suas relações com a missão ética dos médicos. Analisam-se aspectos problemáticos de transformações realizadas pela biomedicina em dois momentos críticos da produção de verdades: 1) a efetivação da cura e 2) sua relação com os tratamentos. A missão ética da biomedicina

Charles Dalcanale Tesser

2007-01-01

142

O PROCESSO DE IMPLEMENTAÇÃO DE UMA VISITA DE ESTUDO VIRTUAL À RESERVA NATURAL DAS BERLENGAS  

Microsoft Academic Search

1. Introdução As visitas de estudo virtuais (VEVs) constituem um modo alternativo de conectar os conceitos da sala de aula às situações do mundo real (Nix, 2000; Ritter, 1998). Existem momentos em que a concretização de uma visita de estudo se apresenta logisticamente inviável, com elevados custos a localizações remotas ou perigosas. Como alternativa, os alunos podem ser conduzidos a

Agostinho Botelho; Isabel Chagas; Ana Sofia Afonso

143

Pharmacokinetics and metabolism of eprinomectin in cats when administered in a novel topical combination of fipronil, (S)-methoprene, eprinomectin and praziquantel.  

PubMed

Four studies were conducted to determine the pharmacokinetic characteristics and in vitro metabolism of eprinomectin, a semi-synthetic avermectin, in cats. Pharmacokinetic parameters including bioavailability of eprinomectin were determined in a parallel study design comprised of one group of eight cats which were treated once topically at 0.12 mL/kg bodyweight with BROADLINE(®), a novel combination product (fipronil 8.3% (w/v), (S)-methoprene 10% (w/v), eprinomectin 0.4% (w/v) and praziquantel 8.3% (w/v)), delivering a dose of 0.5mg eprinomectin per kg body weight, and a group of six cats which received 0.4% (w/v) eprinomectin at 0.4 mg/kg bodyweight once by intravenous injection. For cats treated by topical application, the average eprinomectin (B1a component) maximum plasma concentration (Cmax) was 20 ng/mL. The maximum concentrations were reached 24h after dosing in the majority of the animals (six of eight cats). The average terminal half-life was 114 h due to slow absorption ('flip-flop' kinetics). Following intravenous administration the average Cmax was 503 ng/mL at 5 min post-dose, and the mean elimination half-life was 23 h. Eprinomectin was widely distributed with a mean volume of distribution of 2,390 mL/kg, and the clearance rate was 81 mL/h/kg. Mean areas under the plasma concentration versus time curves extrapolated to infinity were 2,100 ngh/mL and 5,160 ngh/mL for the topical and intravenous doses, respectively. Topical eprinomectin was absorbed with an average absolute bioavailability of 31%. In a second parallel design study, the dose proportionality of eprinomectin after single topical administration of BROADLINE(®) was studied. Four groups of eight cats each were treated once topically with 0.5, 1, 2 or 5 times the minimum recommended dose of the combination, 0.12 mL/kg bodyweight. Based on comparison of areas under the plasma concentration versus time curves from the time of dosing to the last time point at which eprinomectin B1a was quantified, and Cmax, dose proportionality was established. In addition, the metabolic pathway of eprinomectin using cat liver microsomes, and plasma protein binding using cat, rat, and dog plasma were studied in vitro. Results of the analyses of eprinomectin B1a described here showed that it is metabolically stable and highly protein bound (>99%), and thus likely to be, as with other species, excreted mainly as unchanged parent drug in the feces of cats. PMID:24703069

Kvaternick, Valerie; Kellermann, Michael; Knaus, Martin; Rehbein, Steffen; Rosentel, Joseph

2014-04-28

144

Cytokine Responses to the Anti-schistosome Vaccine Candidate Antigen Glutathione-S-transferase Vary with Host Age and Are Boosted by Praziquantel Treatment  

PubMed Central

Background Improved helminth control is required to alleviate the global burden of schistosomiasis and schistosome-associated pathologies. Current control efforts rely on the anti-helminthic drug praziquantel (PZQ), which enhances immune responses to crude schistosome antigens but does not prevent re-infection. An anti-schistosome vaccine based on Schistosoma haematobium glutathione-S-transferase (GST) is currently in Phase III clinical trials, but little is known about the immune responses directed against this antigen in humans naturally exposed to schistosomes or how these responses change following PZQ treatment. Methodology Blood samples from inhabitants of a Schistosoma haematobium-endemic area were incubated for 48 hours with or without GST before (n?=?195) and six weeks after PZQ treatment (n?=?107). Concentrations of cytokines associated with innate inflammatory (TNF?, IL-6, IL-8), type 1 (Th1; IFN?, IL-2, IL-12p70), type 2 (IL-4, IL-5, IL-13), type 17 (IL-17A, IL-21, IL-23p19) and regulatory (IL-10) responses were quantified in culture supernatants via enzyme-linked immunosorbent assay (ELISA). Factor analysis and multidimensional scaling were used to analyse multiple cytokines simultaneously. Principal Findings A combination of GST-specific type 2 (IL-5 and IL-13) and regulatory (IL-10) cytokines was significantly lower in 10–12 year olds, the age group at which S. haematobium infection intensity and prevalence peak, than in 4–9 or 13+ year olds. Following PZQ treatment there was an increase in the number of participants producing detectable levels of GST-specific cytokines (TNF?, IL-6, IL-8, IFN?, IL-12p70, IL-13 and IL-23p19) and also a shift in the GST-specific cytokine response towards a more pro-inflammatory phenotype than that observed before treatment. Participant age and pre-treatment infection status significantly influenced post-treatment cytokine profiles. Conclusions/Significance In areas where schistosomiasis is endemic host age, schistosome infection status and PZQ treatment affect the cellular cytokine response to GST. Thus the efficacy of a GST-based vaccine may also be shaped by the demographic and epidemiological characteristics of targeted populations. PMID:24810615

Bourke, Claire D.; Nausch, Norman; Rujeni, Nadine; Appleby, Laura J.; Trottein, François; Midzi, Nicholas; Mduluza, Takafira; Mutapi, Francisca

2014-01-01

145

Anti-inflammatory/anti-fibrotic effects of the hepatoprotective silymarin and the schistosomicide praziquantel against Schistosoma mansoni-induced liver fibrosis  

PubMed Central

Background Praziquantel (PZQ) is an isoquinoline derivative (2-cyclohexylcarbonyl-1, 2, 3, 6, 7, 11b-hexahydro-4H-pyrazino{2,1-a}-isoquinoline-4-one), and is currently the drug of choice for all forms of schistosomiasis. Silymarin, a standardized milk thistle extract, of which silibinin is the main component, is known for its hepatoprotective, anti-inflammatory, antioxidant activities, and hepatocyte regeneration. This study investigates the anti-inflammatory/anti-fibrotic effects of silymarin and/or PZQ on schistosomal hepatic fibrosis. Methods Schistosoma mansoni-infected mice were divided into two large groups (I & II), each with four subgroups and were run in parallel. (i) Infected untreated; (ii) treated with silymarin, starting from the 4th (3 weeks before PZQ therapy) or 12th (5 weeks after PZQ therapy) weeks post infection (PI); (iii) treated with PZQ in the 7th week PI; and (iv) treated with silymarin, as group (ii) plus PZQ as group (iii). Comparable groups of uninfected mice run in parallel with the infected groups. Mice of groups I and II were killed 10 and 18 weeks PI, respectively. Hepatic content of hydroxyproline (HYP), serum levels and tissue expression of matrix metalloproteinase-2 (MMP-2), transforming growth factor-?1 (TGF-?1) and number of mast cells were determined. In addition, parasitological, biochemical and histological parameters that reflect disease severity and morbidity were examined. Results Silymarin caused a partial decrease in worm burden; hepatic tissue egg load, with an increase in percentage of dead eggs; modulation of granuloma size, with significant reduction of hepatic HYP content; tissue expression of MMP-2, TGF-?1; number of mast cells, with conservation of hepatic reduced glutathione (GSH). PZQ produced complete eradication of worms, eggs and alleviated liver inflammation and fibrosis. The best results were obtained, in most parameters studied, in groups of mice treated with silymarin in addition to PZQ. Conclusions Our results point to silymarin as a promising anti-inflammatory and anti-fibrotic agent; it could be introduced as a therapeutic tool with PZQ in the treatment of schistosomal liver fibrosis, but further studies on mechanisms of silymarin and PZQ in chronic liver diseases may shed light on developing therapeutic methods in clinical practice. PMID:22236605

2012-01-01

146

Efficacy against nematode and cestode infections and safety of a novel topical fipronil, (S)-methoprene, eprinomectin and praziquantel combination product in domestic cats under field conditions in Europe.  

PubMed

A novel topical combination product (BROADLINE(®), Merial) composed of fipronil, (S)-methoprene, eprinomectin and praziquantel was evaluated for safety and efficacy against nematode and cestode infections in domestic cats. The study comprised a multi-centre, positive control, blinded, field study, using a randomized block design based on order of presentation for allocation. In total 196 client-owned cats, confirmed as positive for naturally acquired infections of nematodes and/or cestodes by pre-treatment faecal examination, were studied in seven countries in Europe. Pre-treatment faecal examination revealed the presence of Toxocara, hookworm, Capillaria and/or spirurid nematode infections in 129, 73, 33 or 1 cat(s), respectively; infections with taeniid and Dipylidium cestodes were demonstrated in 39 and 17 cats, respectively. Cats were allocated randomly to one of two treatments in a ratio of 2, topical fipronil (8.3%, w/v), (S)-methoprene (10%, w/v), eprinomectin (0.4%, w/v) and praziquantel (8.3%, w/v) (BROADLINE(®), Merial; 130 cats); and 1, topical PROFENDER(®) Spot-On (Bayer; 66 cats) and treated once on Day 0. For evaluation of efficacy, two faecal samples were collected, one prior to treatment (Day -4 ± 4 days) and one at the end of the study (Day 14 ± 5 days). These were examined for fecal forms of nematode and cestode parasites. For evaluation of safety, cats were examined by a veterinarian before treatment and at the end of the study, and cat owners recorded the health status of their cats daily until the end of the study. For cats treated with Broadline(®), the efficacy was >99.9%, 100%, and 99.6% for Toxocara, hookworms, and Capillaria, respectively; and the efficacy was >99.9%, >99.9%, and 98.5%, respectively, for the cats treated with Profender(®) (p<0.001 for all nematodes and both treatments). Efficacy was 100% for both cestodes for both treatments (p<0.001). No treatment related adverse experiences were observed throughout the study. For both treatments, every cat that completed the study was given a safety score of 'excellent' for both local and systemic evaluations. The topical combination product of fipronil, (S)-methoprene, eprinomectin and praziquantel was shown to have an excellent safety profile and demonstrated high levels of efficacy when administered once as topical solution to cats infected with nematodes and cestodes under field conditions. PMID:24703070

Rehbein, Steffen; Capári, Balazs; Duscher, Georg; Keidane, Dace; Kirkova, Zvezdelina; Petkevi?ius, Saulius; Rapti, Dhimiter; Wagner, Annegret; Wagner, Thomas; Chester, S Theodore; Rosentel, Joseph; Tielemans, Eric; Visser, Martin; Winter, Renate; Kley, Katrin; Knaus, Martin

2014-04-28

147

Imagens do céu ontem e hoje - um multimídia interativo de astronomia e uma nova exposição no MAST  

NASA Astrophysics Data System (ADS)

"Imagens do Céu Ontem e Hoje" é o título de uma nova exposição que está sendo inaugurada no Museu de Astronomia e Ciências Afins (MCT), que inclui experimentos interativos, maquetes, réplicas e 8 terminais de computador com um multimídia interativo sobre Astronomia para consulta dos visitantes. O multimídia apresenta um conteúdo bastante extenso, que engloba quase todos os temas em Astronomia, consistindo numa fonte de divulgação e pesquisa para um público que vai das crianças até estudantes universitários. O conteúdo está distribuído em mais de 500 páginas de texto divididas em 4 módulos: "O Universo", "Espectroscopia", "Telescópios" e "Observando o Céu". Cada módulo é subdividido em 5 seções, em média, cada uma iniciada por uma animação que ilustra os temas a serem abordados na seção. Ao final da animação, uma lista de temas é apresentada sob o título "Saiba Mais". Para exemplificar, o módulo "O Universo" contém as seguintes seções: "O Universo visto pelo homem", "Conhecendo o Sistema Solar", "Indo além do Sistema Solar", "Nossa Galáxia, a Via-Láctea" e "Indo mais além, a imensidão do Universo". A seção "Conhecendo o Sistema Solar", por sua vez, tem os seguintes temas: "A origem do Sistema Solar", "O Sol", "Os planetas", "Satélites, asteróides, cometas e outros bichos..." e "O Sistema Solar em números". Cada texto é repleto de imagens, quadros, desenhos, esquemas, etc, além de passatempos ao final de cada seção, incluindo jogos interativos, quadrinhos e curiosidades, que auxiliam o aprendizado de forma divertida. Apresentamos neste trabalho as idéias gerais que permearam a produção da exposição, e uma viagem pelo multimídia para exemplificar sua estrutura e conteúdo. O multimídia será posteriormente disponibilizado para o público externo pela página eletrônica do MAst e/ou por intermédio de uma publicação comercial.

Caretta, C. A.; Lima, F. P.; Requeijo, F.; Vieira, G. G.; Alves, F.; Valente, M. E. A.; de Almeida, R.; de Garcia, G. C.; Quixadá, A. C.

2003-08-01

148

BENJAMIN FRANKLIN E A HISTÓRIA DA ELETRICIDADE EM LIVROS DIDÁTICOS  

Microsoft Academic Search

Introdução Nos últimos anos, a história da ciência vem sendo introduzida em materiais didáticos utilizados em sala de aula. Uma das razões para isso é a pressão de órgãos governamentais, tais como a Secretaria de Educação Básica, responsável pela avaliação destes livros dentro do Programa Nacional de Livros Didáticos para o ens ino fundamental e médio. Os editais destes programas

Cibelle Celestino Silva; Ana Carolina Pimentel

149

Um Framework para Proviso de QoS em Redes Mveis Sem Fio1  

E-print Network

Um Framework para Provisão de QoS em Redes Móveis Sem Fio1 Luciana dos Santos Lima, Antônio Tadeu A provisão de QoS em redes móveis sem fio integrando soluções isoladas encontradas na literatura. Esses descrita através de um cenário simulado em que serviços integrados são oferecidos sobre uma rede IP Móvel

Colcher, Sérgio

150

Estudo em microondas do aprisionamento e precipitação de elétrons em explosões solares  

NASA Astrophysics Data System (ADS)

Uma explosão solar é uma variação rápida e intensa do brilho que ocorre nas chamadas regiões ativas da atmosfera, constituídas por um plasma magnetizado com intensa indução magnética. Os modelos de explosões solares atuais, discutidos na literatura, apresentam características de aprisionamento e precipitação de elétrons em ambientes magnéticos simplificados. Neste trabalho, nos propusemos a separar a emissão dos elétrons aprisionados da emissão dos elétrons em precipitação apenas a partir da emissão em microondas, melhorando portanto o controle sobre o conjunto de parâmetros inferidos. A emissão em microondas da população em precipitação é bastante fraca e portanto da nossa base de dados de 130 explosões observadas pelo Rádio Polarímetro de Nobeyama, em sete freqüências, apenas para 32 foi possível separar as duas componentes de emissão com uma boa razão sinal/ruído. A partir de estudos das escalas de tempo das emissões devidas à variação gradual da emissão no aprisionamento e da variação rápida da emissão dos elétrons em precipitação foi possível obter a separação utilizando um filtro temporal nas emissões resultantes. Em nossa análise destas explosões estudamos os espectros girossincrotrônicos da emissão gradual, a qual associamos provir do topo dos arcos magnéticos e da emissão de variação rápida associada aos elétrons em precipitação. Estes espectros foram calculados e dos quais inferimos que a indução magnética efetiva do topo e dos pés foi em média, Btopo = 236 G e Bpés = 577 G, inferidas das freqüências de pico dos espectros em ntopo = 11,8 GHz e npés = 14,6 GHz com leve anisotropia (pequeno alargamento espectral). O índice espectral da distribuição não-térmica de elétrons d, inferido do índice espectral de fótons da emissão em regime opticamente fino, foi de dtopo = 3,3 e dpés = 3,9. Estes parâmetros são típicos da maioria das análises realizadas em ambiente único de emissão e a relação dos índices espectrais, dpés > dtopo prioriza as interpretações com difusão em ângulo de passo devida a colisões Coulombianas. Nesta difusão o déficit de elétrons energéticos na precipitação seria uma conseqüência natural da dependência em e-3/2 das colisões elétron-próton (onde e é a energia dos elétrons).

Rosal, A. C.; Costa, J. E. R.

2003-08-01

151

DINÂMICA DA ESTRATÉGIA LOGÍSTICA EM EMPRESAS BRASILEIRAS  

Microsoft Academic Search

RESUMO O objetivo do artigo é analisar a estratégia logística das empresas brasileiras a partir da mensuração do impacto de diferentes características do negócio sobre as principais decisões de produção e distribuição física de produtos acabados. Foi conduzida uma pesquisa de campo em empresas listadas no Ranking Exame para confrontar as quatro políticas propostas por Pagh e Cooper (1998), derivadas

Peter Fernandes Wanke

152

Halema'uma'u Vent Gas Plume  

USGS Multimedia Gallery

Over the past several days, the lava surface within the vent in Halema'uma'u has occasionally, and temporarily, reached to within about 115 m (375 ft) below the floor of Halema'uma'u Crater, as seen in this photo. During these high-lava stands, the gas plume is generally fairly wispy, providing the ...

153

Smartphones para cegos Uma inveno portuguesa  

E-print Network

Smartphones para cegos Uma invenção portuguesa Usar um ecrã tátil de forma discreta, sem recurso ao mentores do projeto. O Holi�raille é uma espécie de capa, acoplável à parte de trás de um smartphone e que

Instituto de Sistemas e Robotica

154

Halema'uma'u Vent Gas Plume  

USGS Multimedia Gallery

Kilauea's active summit vent is on the southeast side of Halema'uma'u Crater. In this photo, the floor of Halema'uma'u stretches out beyond the vent, and the summit of Kilauea Volcano is at upper right. The observation tower at the Hawaiian Volcano Observatory is the highest bump in the photo at Kil...

155

Ambiente e formação estelar em galáxias  

NASA Astrophysics Data System (ADS)

Estudamos o ambiente de galáxias com formação estelar inicialmente a partir de uma amostra limitada em volume proveniente do 2dF Galaxy Redshift Survey. Discriminamos as galáxias com formação estelar com base em distintas classes espectrais, utilizando para esta classificação as larguras equivalentes das linhas [OII]l3727 e Hd. O ambiente é caracterizado pela densidade espacial local de galáxias. Mostramos que a fração de galáxias com formação estelar é bastante reduzida em ambientes densos, enquanto a de galáxias passivas aumenta nestas regiões. Por outro lado, quando analisamos a fração de galáxias que apresentam um surto recente de formação estelar, notamos que ela independe do ambiente, sendo que em regiões mais densas alguns destes objetos apresentam distorções em sua morfologia. Estes resultados são confrontados com a análise da dependência ambiental da taxa de formação estelar, estimada pela emissão em Ha, de uma amostra extraída do Sloan Digital Sky Survey. Um declínio gradual da formação estelar também é observado nesta análise, sugerindo que as interações por efeitos de maré sejam responsáveis pela redução da formação estelar em ambientes densos através da remoção do reservatório de gás das galáxias. No entanto, estas interações também podem induzir surtos de formação estelar nas galáxias, além de peculiaridades morfológicas observadas nos objetos que habitam regiões mais densas.

Mateus, A., Jr.; Sodré, L., Jr.

2003-08-01

156

UMA ROTINA BASEADA EM ALGORITMOS GENÉTICOS PARA IDENTIFICAÇÃO DE HARMÔNICOS EM CHAVEAMENTOS DE BANCO DE CAPACITORES  

Microsoft Academic Search

This paper presents an approach to identify harmonics in power system distorted waveforms. The proposed method is based on Genetic Algorithms, which is an optimization technique inspired by genetics and natural evolution. GOOAL - Genetic Object Oriented ALgorithm, a specially designed intelligent algorithm for optimization problems, was successfully implemented and tested. The software ATP was utilized for the modeling the

RENATA A. MACÊDO; DENIS V. COURY; ADRINANO A. F. M. CARNEIRO; ANDRÉ P. L. F. DE CARVALHO

157

Sobre o uso das séries de Puiseux em mecanica celeste  

NASA Astrophysics Data System (ADS)

Neste trabalho é apresentada uma demonstração do uso dos diferentes desenvolvimentos em séries para as equações de perturbação em Mecânica Celeste no marco Hamiltoniano. Em trabalhos clássicos como os de Poincaré (Poincaré, 1893) por exemplo, já esta planteado o uso de potências não inteiras no pequeno parâmetro, o que evidencia a não analiticidade das funções quando uma ressonância ocorre. Nestes trabalhos os desenvolvimentos são na raíz quadrada da massa de Júpiter (o pequeno parâmetro). Mais recentemente (Ferraz-Mello, 1985) outros tipos de desenvolvimentos foram aplicados modificando substancialmente as ordens de grandeza e a velocidade de convergência das séries. Com esta abordagem, os desenvolvimentos foram expressados em termos da raíz cúbica do pequeno parâmetro. Neste trabalho apresentamos um enfoque geral, onde os diferentes tipos de desenvolvimentos em séries de Puiseux (Valiron, 1950) são obtidos a partir da aplicação de Teorema de Preparação de Weierstrass (Goursat, 1916) considerando a equação de Hamilton-Jacobi como uma equação algébrica. Os resultados são aplicados ao problema restrito dos três corpos em ressonância de primeira ordem e, dependendo da grandeza da excentricidade do asteróide em relação à de Júpiter, obtemos os diferentes desenvolvimentos, em raíz quadrada ou raíz cúbica da massa de Júpiter.

Miloni, O. I.

2003-08-01

158

DIAGNÓSTICO DA AMBIÊNCIA ORGANIZACIONAL DA COMUNIDADE DE PRODUTORES DE PIMENTA LONGA (PIPER HISPIDINERVUM) UNIÃO DA LINHA SEIS DO PROJETO DE COLONIZAÇÃO HUMAITÁ EM PORTO ACRE – AC  

Microsoft Academic Search

Este trabalho apresenta o resultado parcial de uma pesquisa maior sobre a avaliação ambiental e sócio-econômica da produção de pimenta longa (Piper hispidinervum) de uma comunidade de produtores de um projeto de colonização do INCRA. Trata-se da sistematização do que foi levantado em campo, através de pesquisa realizada com 10 (dez) produtores rurais, pertencentes a uma associação de produtores do

Solange Maria Chalub Bandeira Teixeira; Lucas Araujo Carvalho

2008-01-01

159

Propriedades de estruturas temporais rápidas submilimétricas durante uma grande explosão solar  

NASA Astrophysics Data System (ADS)

Apresentamos novas propriedades de variações rápidas da emissão submilimétrica durante uma das maiores explosões solares do ciclo solar 23. Os dados analisados neste estudo foram obtidos com o Telescópio Solar Submilimétrico (SST), que observa o Sol em 212 GHz e 405 GHz, e comparados com emissões em Raios-X duros e Raios-gama (fótons de energia > 10 MeV), que foram obtidas pelo experimento GRS do Yohkoh. Aplicamos diferentes metodologias para detectar e caracterizar, ao longo do evento, os pulsos submilimétricos (duração de 50-300 ms) detectados acima de uma componente mais lenta (alguns minutos). Os resultados mostram que durante a fase impulsiva, num instante próximo ao tempo do máximo do evento, houve um aumento da ocorrência de maiores e de mais rápidas estruturas temporais. Também identificamos uma boa correlação com as emissões em raios-X e raios-gama (até a faixa de energia 10-100 MeV), indicando que os pulsos rápidos submilimétricos refletiram injeções primárias de energia durante o evento.O espectro do fluxo desses pulsos é crescente com a freqüência entre 212 and 405 GHz, na maioria dos casos, ao contrário do observado para a componente gradual. As posições calculadas para as estruturas rápidas são discretas, compactas e localizadas em toda a área da região ativa, o que é previsto nos modelos de explosões solares decorrentes de instabilidades múltiplas em diferentes pequenas regiões. Por outro lado, a posição calculada para a componente lenta é estável durante a fase impulsiva. Assim, a comparação entre as características do espectro de fluxo e da localização da emissão, para os pulsos rápidos e para a componente gradual, sugere que as respectivas emissões são de natureza diferente.

Raulin, J.-P.; Kaufmann, P.; Gimenez de Castro, C. G.; Pacini, A. A.; Makhmutov, V.; Levato, H.; Rovira, M.

2003-08-01

160

UMA/GAN network architecture analysis  

NASA Astrophysics Data System (ADS)

This paper is to critically analyze the architecture of UMA which is one of Fix Mobile Convergence (FMC) solutions, and also included by the third generation partnership project(3GPP). In UMA/GAN network architecture, UMA Network Controller (UNC) is the key equipment which connects with cellular core network and mobile station (MS). UMA network could be easily integrated into the existing cellular networks without influencing mobile core network, and could provides high-quality mobile services with preferentially priced indoor voice and data usage. This helps to improve subscriber's experience. On the other hand, UMA/GAN architecture helps to integrate other radio technique into cellular network which includes WiFi, Bluetooth, and WiMax and so on. This offers the traditional mobile operators an opportunity to integrate WiMax technique into cellular network. In the end of this article, we also give an analysis of potential influence on the cellular core networks ,which is pulled by UMA network.

Yang, Liang; Li, Wensheng; Deng, Chunjian; Lv, Yi

2009-07-01

161

COMUNICAÇÃO DESEMPENHO DE CULTIVARES PARA A PRODUÇÃO DE MILHO VERDE EM DIFERENTES ÉPOCAS E DENSIDADES DE SEMEADURA EM LAVRAS-MG  

Microsoft Academic Search

RES UMO - Com o objetivo de avaliar a viabilidade técnica para a produção de milho verde no município de Lavras- MG, foram avaliadas treze cultivares de milho em três épocas (duas no verão e uma na safrinha) e em duas densidades (35 mil e 55 mil plantas\\/ha) de semeadura. Foram avaliadas as característic as de peso de espigas empalhadas,

CARNEIRO DE PAIVA JUNIOR; RENZO GARCIA VON PINHO; ÉDILA VILELA DE RESENDE VON PINHO; SÉRGIO GERALDO DE RESENDE

162

A emissão em 8mm e as bandas de Merrill-Sanford em estrelas carbonadas  

NASA Astrophysics Data System (ADS)

Estrelas carbonadas possuem bandas moleculares em absorção no visível e, no infravermelho (IR) as principais características espectrais se devem a emissão de grãos. Recentemente foi detectada a presença de bandas de SiC2 (Merrill-Sanford, MS) em emissão sendo atribuída à presença de um disco rico em poeira. Neste trabalho analisamos uma amostra de 14 estrelas carbonadas, observadas no telescópio de 1.52 m do ESO em 4 regiões espectrais diferentes, a fim de detectar as bandas de MS em emissão. Nossa amostra é composta de estrelas que apresentam além da emissão em 11.3 mm, outra em 8 mm. Esta última emissão, não usual nestes objetos, tem sido atribuída ou a moléculas de C2H2, ou a um composto sólido ainda indefinido. A detecção de emissões de MS e aquelas no IR, simultaneamente, revelaria um cenário mais complexo que o habitualmente esperado para os ventos destes objetos. No entanto como primeiro resultado, verificamos que as bandas de Merrill-Sanford encontram-se em absorção, não revelando nenhuma conexão com a emissão a 8 mm. Assim, temos duas hipóteses: (a) a emissão a 8 mm se deve à molécula C2H2 ou (b) essa emissão é resultado da emissão térmica de grãos. Testamos a segunda hipótese modelando a amostra com grãos não-homogêneos de SiC e quartzo, o qual emite em aproximadamente 8mm. Este grão seria produzido em uma fase evolutiva anterior a das carbonadas (estrelas S) e por terem uma estrutura cristalina são destruídos apenas na presença de campos de radiação ultravioleta muito intensos. Os modelos para os envoltórios utilizam o método de Monte Carlo para descrever o problema do transporte da radiação. As conclusões deste trabalho são: (1) as bandas de Merrill-Sanford se encontram em absorção, sugerindo um cenário usual para os ventos das estrelas da amostra; (2) neste cenário, a emissão em 8 mm seria resultado de grãos de quartzo com mantos de SiC, indicando que o quartzo poderia sobreviver a fase evolutiva S.

de Mello, A. B.; Lorenz-Martins, S.

2003-08-01

163

Percepção astronómica de um grupo de alunos do ensino médio de uma escola da rede estadual de São Paulo  

NASA Astrophysics Data System (ADS)

Sendo a Astronomia uma das cièncias mais antigas da humanidade, e considerando sua importáncia histórica e cultural, é de extrema releváncia que tópicos relacionados a ela sejam tratados nas escolas. Embora os Parámetros Curriculares Nacionais do Ensino Médio (PCN-EM) e as Orientaçiacute;es Complementares aos Parámetros (PCN+) apontem a importáncia de uma abordagem significativa de conceitos relacionados à Astronomia nas aulas de Física, muitos estudantes terminam o Ensino Médio (EM) sem compreender a razão de certos acontecimentos de origem celeste, ainda que estes façam parte de seu cotidiano e sejam alvos da curiosidade natural dos jovens. Da observação dessa curiosidade em alunos de uma escola pública paulista, na cidade de Suzano, surgiu o interesse em investigar os conhecimentos básicos em Astronomia dos alunos do Ensino Médio desta escola, constituindo-se este como principal objetivo desta pesquisa. Para tanto foi elaborado um questionário de múltipla escolha aplicado inicialmente a 34 alunos do primeiro ano e, posteriormente, a mais 310, distribuídos entre as très séries do Ensino Médio dos períodos matutino e noturno. Dessa forma, observou-se que 73,9% dos estudantes identificaram o Sol como sendo uma estrela, 67,1% mostraram compreender a sucessão entre dia e noite e 52,3% relacionaram o Big Bang à origem do Universo. Em contrapartida, apenas 34,5% relacionaram as estaçíes do ano à inclinação do eixo de rotação da Terra, 21,3% indicaram a influència gravitacional simultánea da Lua e do Sol como responsável pelo fenòmeno das marés, 24,5% indicaram corretamente quais são os objetos celestes mais próximos da Terra, 36,1% identificaram ano-luz como uma medida de distáncia e 34,2% reconheceram as estrelas cadentes como meteoros, evidenciando-se assim o pequeno discernimento dos estudantes quanto aos fenòmenos e termos astronòmicos do cotidiano. Além disso, foram comparadas as respostas de alun! os de diferentes séries e períodos, observando-se, dentre ou tras coi sas, que os estudantes do terceiro ano apresentam um percentual de acertos semelhante ao dos alunos do primeiro, caracterizando que a abordagem de tópicos relacionados à astronomia no Ensino Médio não tem contribuído de forma significativa para uma maior compreensão dos fenòmenos e conceitos.

de Oliveria, E. F.; Voelzke, M. R.

2009-03-01

164

Halema'uma'u Maintains Basic Geometry  

USGS Multimedia Gallery

The lava lake at Halema'uma'u has maintained the same basic geometry since February of this year. This thermal image was taken during a helicopter overflight, and shows the lava surface deep within the vent cavity. The lava surface is kidney-shaped and approximately 60 x 90 meters in size, and situa...

165

Halema'uma'u Vent Gas Plume  

USGS Multimedia Gallery

The largely crusted surface of the lava lake in the Halema'uma'u vent slowly moves from north (top of the photo) to south. During high lava stands, like that shown here, this circulation is so slow as to be nearly imperceptible to the naked eye....

166

Thermal Image of Halema'uma'u  

USGS Multimedia Gallery

This image was collected from a thermal camera at the Halema`uma`u Overlook, and shows the current activity at the summit. The active lava pond, about 40 m across, is situated deep within the vent cavity, at a depth of about 200 m. The lava surface consists of slowly migrating crustal plates...

167

Halema'uma'u Lava Activity  

USGS Multimedia Gallery

Spectacular eruptive activity has been occurring deep within the collapse pit in Halema`uma`u Crater at K?lauea's summit. At times, a river of lava poured into a deeper plunge pool of lava, which had a dome fountain on its right-hand side....

168

Modelao da Integrao em Arquitecturas de Sistemas de Informao Andr Vasconcelos  

E-print Network

Modelação da Integração em Arquitecturas de Sistemas de Informação André Vasconcelos Instituto.tribolet@ceo.inesc.pt #12;Modelação da Integração em Arquitecturas de Sistemas de Informação Resumo No passado, na definição de arquitecturas de sistemas de informação (ASI) a integração era considerada uma questão de segunda

169

Comportamento de Pantala flavescens (Odonata, Anisoptera, Libellulidae) e perda do investimento reprodutivo em áreas antropizadas  

Microsoft Academic Search

RESUMO: Pantala flavescens é uma libélula exofítica, territorialista e migratória. Devido ao comportamento migratório, a ocorrência desta espécie em áreas não alagadas é comum. No entanto, a presença de P. flavescens em áreas de estacionamento de veículos e o registro de eventos de oviposição sobre as latarias de automóveis não é bem entendida. O presente trabalho apresenta dados comportamentais de

Antonia Figueira Van de Koken

2007-01-01

170

ANÁLISE DE INVESTIMENTOS EM GERAÇÃO HIDRÁULICA UTILIZANDO A TEORIA DE OPÇÕES REAIS  

Microsoft Academic Search

1. RESUMO Este trabalho apresenta uma metodologia de análise de investimentos em geração de energia elétrica utilizando Teoria de Opções Reais. Particularmente, é avaliada a oportunidade de investimento em geração hidráulica a ser comercializada no leilão de energia nova utilizando-se da alternativa de financiamento do Programa de Financiamento de Geração de Energia Elétrica (Energia Nova) do BNDES. Como os empreendimentos

J. C. CAMINHA NORONHA; J. W. MARANGON LIMA; T. G. LEITE FERREIRA

171

TRANSTORNO DE DÉFICIT DE ATENÇÃO\\/HIPERATIVIDADE EM ADULTOS - ASPECTOS CLÍNICOS  

Microsoft Academic Search

O Transtorno de Déficit de Atenção\\/hiperatividade (TDAH), reconhecido como podendo persistir na vida adulta apenas na década de 80, causa considerável comprometimento no desempenho social, ocupacional e pessoal do indivíduo, além apresentar-se em comorbidade com outros quadros clínicos. Tendo em vista a prevalência e as limitações causadas pelo TDAH o objetivo deste estudo foi realizar uma revisão da literatura acerca

Maria da Graça; Tanori de Castro; Rosemeri Siqueira Pedroso; Renata Brasil Araujo

2009-01-01

172

Analisando livros didáticos na perspectiva dos Estudos do Discurso: compartilhando reflexões e sugerindo uma agenda para a pesquisa  

Microsoft Academic Search

Resumo: Neste artigo, apÛs uma breve revisªo de pesquisas que tomam o livro didÆtico como objeto, delineamos os pressupostos teÛrico-metodolÛgicos de abordagens identificadas com os Estudos do Discurso e que tŒm fundamentado nossas investigaÁies sobre o livro didÆtico de ciŒncias. Em seguida, apresentamos nossas investigaÁies, que significam o livro didÆtico de ciŒncias em relaÁªo ‡s suas condiÁies sociais de produÁªo,

Isabel Martins

2006-01-01

173

A Rodaviva das Tecnologias Novas tecnologias do origem, em geral, a novos modelos de negcio que por sua vez  

E-print Network

A Roda­viva das Tecnologias Novas tecnologias dão origem, em geral, a novos modelos de negócio que palavras, velhas tecnologias reaparecem com uma nova roupagem como se submetidas a um processo de mundo. O uso dos browsers para utilizar esses servidores é nada mais do que uma nova roupagem para um

174

UM PROJETO ALTERNATIVO PARA INICIAÇÃO EM TECNOLOGIAS DIFITAIS NA FORMAÇÃO INICIAL DE PROFESSORES DE CIÊNCIAS E BIOLOGIA  

Microsoft Academic Search

Uma discussão sobre a formação de professores que sejam capazes de incorporar as tecnologias digitais na educação como recurso no processo de ensino -aprendizagem nas escolas da educação básica no Brasil passa necessariamente por um questionament o da prática atual das nossas licenciaturas em plena Era da Informação... De uma maneira geral, nas licenciaturas brasileiras ainda não se usam os

Simão Marinho

175

Curso de Calculo de Uma Variavel  

E-print Network

Instituto de Matemática Universidade Federal do Rio de Janeiro Departamento de Matemática Aplicada Instituto de Matemática Universidade Federal do Rio de Janeiro Rio de Janeiro - Brasil Cópias são autorizadas e. Curso de Cálculo de Uma Variável / Marco Cabral - Rio de Janeiro: Instituto de Matemática, 2010. 1

Cabral, Marco

176

Formation of the 47 UMa System  

NASA Astrophysics Data System (ADS)

Formation of planets in the 47 UMa system is followed in an evolving protoplanetary disk composed of gas and solids. The evolution of the disk is calculated from an early stage, when all solids are in the dust form, to the stage when most solids are locked in planetesimals. The simulation of planetary evolution starts when the planetesimals have formed a solid embryo of about 1 Earth mass, and proceeds according to the core accretion -- gas capture model. It is found that conditions suitable for both planets to form within several Myr are easily created, and maintained throughout the formation time, in disks with ??0.01. In such disks, a planet of 2.6 Jupiter masses (the minimum for the inner planet of the 47 UMa system) may be formed at 2.1 AU from the star in about 3 Myr, while a planet of 0.89 Jupiter masses (the minimum for the outer planet of the 47 UMa system) may be formed at 3.95 AU from the star in about the same time. The formation of planets is possible as a result of a significant enhancement of the surface density of solids between 1.0 and 4.0 AU, which results from the evolution of a disk with an initially uniform gas-to-dust ratio of 100 and an initial radius of 40 AU.

Bodenheimer, P.; Kornet, K.; Ró?yczka, M.

177

População estelar jovem em galáxias irregulares próximas  

NASA Astrophysics Data System (ADS)

A análise do conteúdo estelar de galáxias próximas através da fotometria das suas estrelas resolvidas nos fornece informações importantes sobre a história de formação estelar e os processos de formação estelar em galáxias, que estão diretamente ligados ao estudo de evolução de galáxias. Quando nenhuma estrela puder ser resolvida o método mais poderoso consiste na análise do conteúdo estelar integrado das galáxias através das suas cores integradas em conjunto com informação espectroscópica que combinados com modelos de síntese evolutiva podem restringir simultaneamente a função de massa inicial (IMF) e a taxa de formação estelar (SFR). Nesse contexto, galáxias do tipo tardio, em particular, irregulares, são relevantes por várias razões: elas são objetos relativamente simples, com alta atividade de formação estelar e são objetos relativamente jovens (geralmente apresentam baixas abundâncias de elementos pesados e grande quantidade de gás). Apresentamos uma análise fotométrica de uma amostra de 7 galáxias do tipo tardio do universo local (NGC 2366, NGC 4395, NGC 4656, NGC 4214, NGC 4236, HOII, IC2574) que foram observadas com uma boa resolução espacial nas bandas B, V e R no telescópio Isaac Newton de 2.5m de Roque de los Muchachos nas Ilhas Canárias, Espanha. A distribuição espacial da população estelar jovem dessas galáxias é discutida sobre os pontos de vista dos íindices de cor integrados e dos seus diagramas cor magnitude, que comparados com isócronas teóricas, nos fornecem informações sobre os eventos de formação estelar, como por exemplo, indicações sobre a idade dos mesmos. As principais conclusões do trabalho podem ser resumidas em: (i) As galáxias irregulares possuem formação estelar recente (FE) espalhada ocorrendo nos últimos 50 Manos; (ii) A formação estelar em galáxias irregulares não é auto-propagante em escalas globais ( > 100 pc) ; (iii) A FE pode ser auto-regulável em escalas espaciais de poucas dezenas de parsec; (iv) As galáxias irregulares sofreram um evento principal de FE há 1010 anos atrás, o que implica que houve um momento na evolução do universo onde a maior parte das estrelas se formaram em galáxias.

Guimarães, T. A.; Telles, E.

2003-08-01

178

Corpos no interior de um recipiente fechado e transparente em queda livre  

E-print Network

Neste artigo discutimos uma nova demonstracao experimental da independencia das propriedades dos corpos (massa, composicao quimica, forma, etc.) na queda livre. Eh uma das experiencias mais simples, porem uma das mais importantes da Mecanica, tendo sido realizada e repensada repetidamente por diversos cientistas tais como Galileu e Newton. Nossa versao eh introduzir dentro de uma garrafa fechada e transparente uma pena e uma pedra observando a queda simultanea destes corpos. Por nao haver a necessidade de produzir vacuo, esta versao pode ser repetida por qualquer aluno e professor de ensino medio e universitario em qualquer ambiente, evidenciando sua viabilidade e aplicabilidade na sala de aula. English version of abstract: In this paper we discuss a new experimental demonstration of the independence of the properties of bodies (mass, chemical composition, shape, etc) in free fall. This is one of the simplest experiments in mechanics, though one of the most important ones, having been repeatedly carried out a...

Lunazzi, Jose Joaquin

2008-01-01

179

O acolhimento à família na Unidade de Terapia Intensiva: conhecimento de uma equipe multiprofissional Family embracement in the Intensive Care Unit: the knowledge of a multiprofessional team Acogiendo a la familia en la Unidad de Cuidados Intensivos: conocimiento de un equipo multiprofesional  

Microsoft Academic Search

RESUMO Estudo exploratório descritivo, de abordagem qualitativa, que objetivou investigar o conhecimento dos profissionais de saúde de uma Unidade de Terapia Intensiva (UTI) sobre o acolhimento à família. Foi realizado entre os meses de setembro a novembro de 2007 em uma UTI localizada na região Sul do país, com a participação de profissionais de enfermagem, médicos, assistente social e auxiliar

Cláudia Koch; Dulcineia Ghizoni; Hilário Mattioli

180

Telescópio de patrulhamento solar em 12 GHz  

NASA Astrophysics Data System (ADS)

O telescópio de patrulhamento solar é um instrumento dedicado à observação de explosões solares com início de suas operações em janeiro de 2002, trabalhando próximo ao pico de emissão do espectro girossincrotrônico (12 GHz). Trata-se de um arranjo de três antenas concebido para a detecção de explosões e determinação em tempo real da localização da região emissora. Porém, desde sua implementação em uma montagem equatorial movimentada por um sistema de rotação constante (15 graus/hora) o rastreio apresentou pequenas variações de velocidade e folgas nas caixas de engrenagens. Assim, tornou-se necessária a construção de um sistema de correção automática do apontamento que era de fundamental importância para os objetivos do projeto. No segundo semestre de 2002 empreendemos uma série de tarefas com o objetivo de automatizar completamente o rastreio, a calibração, a aquisição de dados, controle de ganhos, offsets e transferência dos dados pela internet através de um projeto custeado pela FAPESP. O rastreio automático é realizado através de um inversor que controla a freqüência da rede de alimentação do motor de rastreio podendo fazer micro-correções na direção leste-oeste conforme os radiômetros desta direção detectem uma variação relativa do sinal. Foi adicionado também um motor na direção da declinação para correção automática da variação da direção norte-sul. Após a implementação deste sistema a precisão do rastreio melhorou para um desvio máximo de 30 segundos de arco, o que está muito bom para este projeto. O Telescópio se encontra em funcionamento automático desde março de 2003 e já conta com várias explosões observadas após a conclusão desta fase de automação. Estamos apresentando as explosões mais intensas do período e com as suas respectivas posições no disco solar.

Utsumi, F.; Costa, J. E. R.

2003-08-01

181

Posições de licenciandos em física sobre leituras no ensino médio da física moderna e contemporânea em textos de divulgação científica * Future high school teachers' positions about high school modern and contemporary physics popular science reading  

Microsoft Academic Search

Temos por objetivo, neste estudo, compreender aspectos do imaginário de licenciandos, em física, sobre a possibilidade de utilização de textos de divulgação científica de física moderna e contemporânea em classes de ensino médio, através de uma atividade de leitura de textos de divulgação científica, contidos nas revistas Pesquisa Fapesp e Ciência Hoje, na qual os licenciandos responderam um questionário com

Ricardo Henrique Almeida Dias; Maria José; Pereira Monteiro de Almeida

182

Once a year school-based deworming with praziquantel and albendazole combination may not be adequate for control of urogenital schistosomiasis and hookworm infection in Matuga District, Kwale County, Kenya  

PubMed Central

Background Neglected tropical diseases (NTDs) predominantly occur in resource poor settings where they often present a serious public health burden. Sustained global advocacy has been important in raising awareness of NTDs and the relatively low cost for control of helminthic NTDs using preventive chemotherapy. This enthusiasm was boosted at the London declaration on NTDs in 2012 through commitments by different partners to avail resources required for control of NTDs particularly those that employ preventive chemotherapy as the major intervention strategy. Subsequently, national NTD programmes are responding to these new opportunities by implementing preventive chemotherapy including school-based deworming (SBD). Further, with the availability of increased resources, both financial and pharma, the optimal strategies for implementing preventive chemotherapy in highly endemic settings are under debate and this paper goes some way to addressing this issue in a specific setting in coastal Kenya. Methods We conducted a repeated cross-sectional study in Matuga District, Kwale County, Kenya to evaluate the effect of school-based co-administration of praziquantel and albendazole against urogenital schistosomiasis and soil-transmitted helminth (STH) infections. A total of 1022 school children in 5 study schools were tested for the infections in urine and stool samples during a baseline survey in September 2009. The presence of Schistosoma haematobium infection was determined by the urine filtration method while STH infections were determined by Kato-Katz technique. Results Urogenital schistosomiasis and hookworm infection were the major parasitic infections among the children in the study area. There was significant decrease in both prevalence and intensity of S. haematobium infection after treatment but varying levels of rebound were observed during the period between the treatments. The school-based treatment, however, did not have any significant effect on both the prevalence and intensity of hookworm infection. Conclusions Once per year SBD programmes may not be adequate for controlling hookworm infection and urogenital schistosomiasis in rural areas of Kwale County. There is a need to consider expanded preventive chemotherapy strategies that will allow inclusion of the adult populations. Community-based health education campaigns focusing on increasing household latrine ownership and use, as a complementary measure to control STH and urogenital schistosomiasis in similar settings, may also be useful. PMID:24552246

2014-01-01

183

Diagnostic Performance of Schistosoma Real-Time PCR in Urine Samples from Kenyan Children Infected with Schistosoma haematobium: Day-to-day Variation and Follow-up after Praziquantel Treatment  

PubMed Central

Background In an effort to enhance accuracy of diagnosis of Schistosoma haematobium, this study explores day-to-day variability and diagnostic performance of real-time PCR for detection and quantification of Schistosoma DNA compared to other diagnostic tools in an endemic area before and after treatment. Methodology Previously collected urine samples (N?=?390) from 114 preselected proven parasitological and/or clinical S. haematobium positive Kenyan schoolchildren were analyzed by a Schistosoma internal transcribed spacer-based real-time PCR after 14 years of storage. Pre-treatment day-to-day fluctuations of PCR and microscopy over three consecutive days were measured for 24 children using intra-class correlation coefficient. A combined ‘gold standard’ (PCR and/or microscopy positive) was used to measure sensitivity and negative predictive value (NPV) of several diagnostic tools at baseline, two and 18 months post-treatment with praziquantel. Principal Findings All 24 repeatedly tested children were PCR-positive over three days with little daily variation in median Ct-values, while 83.3% were found to be egg-positive for S. haematobium at day 1 and 75.0% at day 2 and 3 pre-treatment, signifying daily fluctuations in microscopy diagnosis. Of all 114 preselected schoolchildren, repeated microscopic measurements were required to detect 96.5% versus 100% of positive pre-treatment cases by single PCR. At two months post-treatment, microscopy and PCR detected 22.8% versus 69.3% positive children, respectively. Based on the ‘gold standard’, PCR showed high sensitivity (>92%) as compared to >31% sensitivity for microscopy, both pre- and post-treatment. Conclusions/Significance Detection and quantification of Schistosoma DNA in urine by real-time PCR was shown to be a powerful and specific diagnostic tool for detection of S. haematobium infections, with less day-to-day variation and higher sensitivity compared to microscopy. The superior performance of PCR before, and two and 18 months post-treatment provides a compelling argument for PCR as an accurate and reproducible tool for monitoring treatment efficacy. PMID:24743389

Vinkeles Melchers, Natalie V. S.; van Dam, Govert J.; Shaproski, David; Kahama, Anthony I.; Brienen, Eric A. T.; Vennervald, Birgitte J.; van Lieshout, Lisette

2014-01-01

184

APLICAO DE AGENTES MVEIS EM REDES DE SENSORES SEM FIO PARA LOCALIZAO E SEGUIMENTO DE OBJETOS ALVOS MVEIS  

E-print Network

APLICAÇÃO DE AGENTES MÓVEIS EM REDES DE SENSORES SEM FIO PARA LOCALIZAÇÃO E SEGUIMENTO DE OBJETOS sistema embarcado baseada em uma aplicação de localização e seguimento de objeto alvo utilizando redes de sensores sem fio (RSSF). Sendo os nós da rede fixos, realiza-se o seguimento do alvo utilizando agentes

Wagner, Flávio Rech

185

Teores de nutrientes na folha e nos grãos de aveia-preta em função da adubação com fósforo e potássio  

Microsoft Academic Search

A aveia-preta é uma gramínea rústica, pouco exigente, cultivada, principalmente, como forrageira de inverno e como cultura para adubação verde em sistemas de rotação. Apesar de sua importância, há poucos trabalhos em que foram avaliados os efeitos da adubação sobre os teores de nutrientes nas folhas ou nos grãos. Com o objetivo de estudar os efeitos de doses de P

João Nakagawa; Ciro Antonio Rosolem

2005-01-01

186

TERESA PENA, PRESIDENTE DA SOCIEDADE PORTUGUESA DE FSICA, EM ENTREVISTA "UM PAS SEM CINCIA NO UM PAS  

E-print Network

TERESA PENA, PRESIDENTE DA SOCIEDADE PORTUGUESA DE FÍSICA, EM ENTREVISTA "UM PAÍS SEM CI�NCIA N�O � Teresa Pena, Professora do Instituto Superior Técnico e Presidente da Sociedade Portuguesa de Física, em entrevista à Revista Pontos de Vista. Saiba mais da Sociedade Portuguesa de Física, uma entidade que tem como

Instituto de Sistemas e Robotica

187

High speed photometry of AN UMa  

SciTech Connect

As a class, the AM Her objects exhibit temporal variability on time scales ranging from seconds to years. Most of the variations can be adequately described by ''shot noise'' models (Cordova and Mason 1982). Exceptions to this are the strictly periodic features modulated on the orbital periods of the systems (typically several hours) and the one to two second features which show up as ''excesses'' of power in the time averaged power spectra of AN UMa (Middleditch 1982) and E1405-451 (Mason et al. 1983; Larsson 1985). It has been suggested that the short time scale features are due to an oscillatory ''instability'' of radiative accretion shocks discovered by Langer, Chanmugam, and Shaviv (1981, 1982). This is an interesting suggestion because, if true, it would allow the masses of the accreting white dwarfs to be inferred and would provide other significant constraints on the physics of the accretion flows (see Langer et al. 1981, 1982; Chevalier and Imamura 1982; Imamura, Wolff, and Durisen 1984; Imamura 1985). Unfortunately, a direct physical relationship between the one to two second optical variations and shock oscillations has not yet been demonstrated. Because of the potential importance of such a result further study of these systems is clearly warranted. In this work, we examine the short time scale behavior of AN UMa in more detail and improve on the work of Middleditch (1982) by resolving the feature in time.

Imamura, J.N.; Steiman-Cameron, T.Y.; Durisen, R.H.

1985-01-01

188

Uma viagem pelo mundo nanoUma viagem pelo mundo nano Naira Maria Balzaretti  

E-print Network

Nanotecnologia ­ CNANO UFRGS fonte: seminfonte: semináário de João Schmidtrio de João Schmidt #12 biológicas diferenciadas NANOTECNOLOGIA #12;"Desenvolvimento de pesquisa e tecnologia nas escalas atômica nanotecnologia incluem a manipulação sob controle das estruturas na nanoescala e sua integração em componentes

dos Santos, C.A.

189

SU Uma stars: Rebrightenings after superoutburst  

E-print Network

SU Uma stars after their long superoutbursts often show single or multiple rebrightenings. We show how this phenomenon can be understood as repeated reflections of transition waves which mediate changes between the hot and the cool state of the accretion disk and travel back and forth in the outer disk region, leaving an inner part permanently hot. This points to a temporarily increased viscosity, possibly related to the formation of large-scale and longer persisting magnetic fields by the dynamo operation during the long superoutburst. The 'mini-rebrightenings' in the early post-outburst light curve of V585 Lyr discovered by Kato and Osaki in Kepler observations seem to be understandable as a small limit cycle of low luminosity changes originating from a wiggle-feature in the thermal equilibrium curve of the cool optically thick disk.

Meyer, Friedrich

2015-01-01

190

A Roda-viva das Tecnologias Novas tecnologias do origem, em geral, a novos modelos de negcio que por sua vez  

E-print Network

A Roda-viva das Tecnologias Novas tecnologias dão origem, em geral, a novos modelos de negócio que palavras, velhas tecnologias reaparecem com uma nova roupagem como se submetidas a um processo de mundo. O uso dos browsers para utilizar esses servidores é nada mais do que uma nova roupagem para um

191

On the minimum mass ratio of W UMa binaries  

Microsoft Academic Search

Using Eggleton's stellar evolution code, we study the minimum mass ratio (qmin) of W Ursae Majoris (W UMa) binaries that have different primary masses. It is found that the minimum mass ratio of W UMa binaries decreases with increasing mass of the primary if the primary's mass is less than about 1.3Msolar, while above this mass the ratio is roughly

Dengkai Jiang; Zhanwen Han; Jiancheng Wang; Tianyu Jiang; Lifang Li

2010-01-01

192

A clínica pulsional de Wilhelm Reich: uma tentativa de atualização  

Microsoft Academic Search

Busca-se propor uma fundamentação da psicoterapia corporal de inspiração reichiana dentro do quadro de referência da pri meira teoria freudiana das pulsões. Tenta-se explicar os elementos próprios da abordagem reichiana a partir da idéia de uma dinâmica psíquica baseada no conflito entre pulsão e defesa. Também são discutidas, brevemente, algumas possibilidades de ampliação desse modelo a partir de propostas oriundas

Ricardo Amaral Rego

2003-01-01

193

UMA CRÍTICA À TEORIA DA COMPLEXIDADE PROPOSTA POR  

Microsoft Academic Search

Resumo: O escopo de nosso artigo restringe-se à proposição de uma crítica à teoria da complexidade quanto ao seu pressuposto ontológico: realidade complexa e à inalação decorrente de tal pressuposto; a necessidade de uma ciência da complexidade. Essa crítica visa apontar, por um lado, as insuficiências da referida teoria, marcada por um forte apelo metafísico, quando essa pretende estabelecer um

EDGAR MORIN; Érico Andrade

194

Thermal Image of Halema'uma'u Crater  

USGS Multimedia Gallery

This thermal image (white is hot, dark blue is cold), taken during today's helicopter overflight, shows the current vent configuration at Halema`uma`u crater. The vent cavity is about 130 meters (430 ft) wide, and has consumed portions of the wall and floor of Halema`uma`u crater. Th...

195

21 CFR 522.1870 - Praziquantel.  

Code of Federal Regulations, 2014 CFR

...removal of canine cestodes Dipylidium caninum, Taenia pisiformis, and Echinococcus granulosus, and removal and control of canine cestode Echinococcus multilocularis. (iii) Limitations. Federal law restricts this drug to use...

2014-04-01

196

21 CFR 522.1870 - Praziquantel.  

Code of Federal Regulations, 2013 CFR

...removal of canine cestodes Dipylidium caninum, Taenia pisiformis, and Echinococcus granulosus, and removal and control of canine cestode Echinococcus multilocularis . (iii) Limitations. Federal law restricts this drug to use...

2013-04-01

197

IDENTIFICAC ~AO E RASTREAMENTO EM TEMPO REAL DE M ULTIPLOS AGENTES AUT ^ONOMOS  

E-print Network

- treamento em tempo real de objetos durante o jogo. Diversos experimentos reais s~ao realizados para~ao, v´arios experimentos t^em sido realizados visando `a construc¸~ao de um time completo de rob^os com^o deve carregar uma bola de ping-pong colorida que ´e usada como o uniforme ou camiseta do time. O campo

Zhang, Richard "Hao"

198

Rotação do jato em DG tau próximo à região de sua formação: análise comparativa das velocidades radiais simuladas e observadas  

NASA Astrophysics Data System (ADS)

Os modelos magneto-centrífugos utilizados para explicar a formação dos jatos Herbig-Haro assumem a presença de um disco de acresção em rotação kepleriana na base de lançamento do jato. Neste cenário, o jato transmite a informação da rotação do disco para regiões distantes da fonte central, além da superfície de Alfvén, na região de colimação inicial do jato. Recentemente, Bacciotti et al. (2002, ApJ, 537, L49) obtiveram pela primeira vez uma evidência observacional de rotação em um jato HH, o jato em DG Tau, em regiões próximas da fonte central, compatível (qualitativa e quantitativamente) com o esperado a partir dos modelos magneto-centrífugos para a produção e colimação inicial de jatos HH. No presente trabalho, apresentamos mapas de velocidade radial, obtidos através de simulações numéricas tri-dimensionais SPH, para um jato com características semelhantes ao jato em DG Tau, objetivando uma comparação com os mapas de velocidade radiais obtidos por Bacciotti et al.. Nossos resultados, embora preliminares, indicam que a inclusão de efeitos como a precessão, evidenciada em DG Tau (Dougados et al. 2000, A&A, 357, L61) devem ser levadas em consideração na análise da presença de rotação não só em DG Tau mas em qualquer sistema, com o uso das velocidades radias observadas. A ausência de um grau elevado de simetria axial (quebrada, por exemplo, pela precessão do eixo do jato; ou pela presença de uma superfície interna de trabalho, ou seja, um bow shock interno), implica também em uma maior complexidade nos mapas, com conseqüências relevantes para suas interpretações.

Cerqueira, A. H.; de Gouveia dal Pino, E. M.

2003-08-01

199

Davis o ambiente ideal para estudantes internacionais estudarem, desenvolverem-se como cidados mundiais e fazerem amigos para toda a vida. Davis tem uma populao  

E-print Network

a sociedade e o 10º lugar em termos de gastos com pesquisas. Todos os anos, mais de 30 000 alunos estudam informações Para baixar um folheto com informações sobre todos os nossos cursos, visite nosso website ou entre o ano todo, é um dos cursos de inglês intensivo mais antigos e respeitados dos EUA. Com uma carga

California at Davis, University of

200

Estudo comparativo entre estrelas centrais de nebulosas planetárias deficientes em hidrogênio  

NASA Astrophysics Data System (ADS)

Apresentamos neste trabalho o resultado de um estudo das principais características espectrais das estrelas centrais de nebulosas planetárias (ECNP) deficientes em hidrogênio. A origem e a evolução dessas estrelas ainda constitui um problema em aberto na evolução estelar. Geralmente esses objetos são divididos em [WCE], [WCL] e [WELS]. Os tipos [WCE] e [WCL] apresentam um espectro típico de uma estrela Wolf-Rayet carbonada de população I e as [WELS] apresentam linhas fracas de carbono e oxigênio em emissão. Existem evidências que apontam a seguinte sequência evolutiva : [WCL] = > [WCE] = > [WELS] = > PG 1159 (pré anã-branca). No entanto, tal cenário apresenta falhas como por exemplo a falta de ECNP entre os tipos [WCL] e [WCE]. Baseados em uma amostra de 24 objetos obtida no telescópio de 1.52m em La Silla, Chile (acordo ESO/ON), ao longo do ano 2000, apresentamos os resultados da comparação das larguras equivalentes de diversas linhas relevantes entre os tipos [WCL], [WCE] e [WELS]. Verificamos que nossos dados estão de acordo com a sequência evolutiva. Baseado nas linhas de C IV, conseguimos dividir pela primeira vez as [WELS] em dois grupos principais. Além disso, os dados reforçam a afirmação de que as [WCE] são as estrelas que possuem a maior temperatura entre as ECNP deficientes em hidrogênio. Discutimos ainda, a escassez de dados disponíveis na literatura e a necessidade da obtenção de parametros físicos para estes objetos.

Marcolino, W. L. F.; de Araújo, F. X.

2003-08-01

201

Determinac~ao da parametrizac~ao e curvatura de uma superficie em R3  

E-print Network

, Karl Schwarzschild descobriu a solu¸c~ao das equa¸c~oes de Einstein correspondente ao campo de gravita´icie. Determina¸c~ao da m´etrica Se restringirmos o espa¸co-tempo de Schwarzschild a tr^es dimens~oes (t, r~ao, que (3) ´e a m´etrica medida pelos observadores esta- cion´arios no espa¸co-tempo de Schwarzschild

Natário, José

202

Parasitismo intestinal em uma aldeia indígena Parakanã, sudeste do Estado do Pará, Brasil  

Microsoft Academic Search

To determine the occurrence and epidemiological aspects of intestinal parasites among the Parakanã indigenous people in the Paranatinga settlement (in the eastern Amazon Region), parasitological tests were performed in April 1992 and February 1995. One fresh stool specimen was obtained and immediately processed using the Hoffman and direct methods. Some 126 samples were obtained in April 1992 (from a total

Rogério dos Anjos Miranda; Fábio Branches Xavier; Raimundo Camurça de Menezes

1998-01-01

203

Nutrição e saúde infantil em uma comunidade indígena Teréna, Mato Grosso do Sul, Brasil  

Microsoft Academic Search

This paper describes the health and nutritional situation of South American Indian children from a Teréna community, characterizing their nutritional status, food consumption, and socioeconomic and environmental conditions. The sample included 100 children, ranging from 0 to 59 months of age and living in Aldeia Córrego do Meio, Mato Grosso do Sul. Prevailing nutritional deficits were: 8.0% for the weight-for-age

Dulce Lopes Barboza Ribas; Alfredo Sganzerla; José Roberto Zorzatto; Sonia Tucunduva Philippi

2001-01-01

204

Fatores de risco para poliparasitismo intestinal em uma comunidade indígena de Pernambuco, Brasil  

Microsoft Academic Search

An investigation into the ethno-epidemiological profile of the Pankararu indigenous group in the State of Pernambuco, Brazil, identified multiple intestinal parasites in nearly all members of the community. To detect possible environmental risk factors, we used the data base from a previous survey to test relations between daily living conditions (housing, sanitation, wa- ter supply and treatment, and garbage disposal)

Annick Fontbonne; Eduardo Freese-de-Carvalho; Moab Duarte Acioli; Geisa Amorim de Sá; Eduarda Angela Pessoa Cesse

2001-01-01

205

AMBIENTE DE EXPERIMENTAÇÃO EM MANIPULAÇÃO ROBÓTICA USANDO UMA ESTAÇÃO ROBÓTICA EDUCACIONAL E PROGRAMAÇÃO MATLAB  

Microsoft Academic Search

This article describes a locally developed robotic station for experiences in object manipulation. The station was implemented around the mechanical structure of the Rhino XR4 robot, having developed a multi-axis controller and a programming interface. Due to the facilities in mathematical processing and visual representation the Matlab computational environment was now chosen. A Matlab toolbox (Rhinobox) was de- veloped what

Humberto A. Guimarães; Frederico F. Elsner; V. H. Casanova Alcalde

206

Drogas e saúde na imprensa brasileira: uma análise de artigos publicados em jornais e revistas  

Microsoft Academic Search

This article analyzes information recently published by the Brazilian press on the use of psychoactive drugs and its implications on health. A sample of 502 newspaper and magazine articles published in 1998 was researched using content analysis. The drugs most frequently fea- tured in the headlines were tobacco (18.1%), coca-derived drugs (9.2%), marijuana (9.2%), alco- holic beverages (8.6%), and anabolic

Ana Regina Noto; Murilo C. Baptista; Silene T. Faria; Solange A. Nappo; José Carlos F. Galduróz; Elisaldo A. Carlini

2003-01-01

207

COMUNICA» C~ AO ETHERNET EM TEMPO-REAL PARA UMA REDE DE MICROCONTROLADORES  

Microsoft Academic Search

Abstract| Ethernet is well-known as the standard information network, additionally, its use in control and industrial networks has also recently grown. However, these control networks usually have stronger time require- ments that may be compromised by Ethernet low-level behavior, for example, nondeterministic retransmissions in case of message collisions. This papers proposes an approach to allow real-time communication through Eth- ernet

Andrey E. M. Brito; Francisco V. Brasileiro; Carlos Eduardo Leite

208

AO ETHERNET EM TEMPO-REAL PARA UMA REDE DE MICROCONTROLADORES  

Microsoft Academic Search

Ethernet is well-known as the standard information network, additionally, its use in control and industrial networks has also recently grown. However, these control networks usually have stronger time require- ments that may be compromised by Ethernet low-level behavior, for example, nondeterministic retransmissions in case of message collisions. This papers proposes an approach to allow real-time communication through Eth- ernet networks

Andrey E. M. Brito; Francisco V. Brasileiro; Carlos Eduardo Leite

209

Autômato Celular para Estudar Espalhamento e Evolução da Pneumonia por Pneumococos em uma População  

Microsoft Academic Search

The pneumonia is an infectious and contagious disease, caused by a great number of differents bacteria, being the first mortality cause between lung diseases and has an important position between the greats causers of mortality between adults. The victims of pneumonia are a significant number and analyzing it is possible note the importance of this disease and the understanding necessity

Yuri Saito; Marco Antônio; Alves da Silva; Domingos Alves

210

Uma possível interpretação da referência musical em De Umbris de Oiliam Lanna  

Microsoft Academic Search

The present study is an inquiry, based on the semiotic theory of Charles Sanders Peirce (1839-1914), about the possible meanings that can be extracted from the piece De Umbris, for two bassoons and piano, composed in 1992 by Oiliam Lanna. The horizon of this science is very broad, touching different areas of human knowledge (psychoanalysis, literature, music, etc.). The musical

Cecília Nazaré de Lima

211

E-foto: Módulo de retificação de imagens em uma estação fotogramétrica digital  

Microsoft Academic Search

This paper shows the rectification module of a photogrammetric digital workstation. Such module is part of the project e-foto. Palavras-chave: digital photogrammetry, free software, fotogrametria digital, software livre. 1. Introdução Entende-se por fotogrametria o conjunto de técnicas e rotinas de processamento de imagens fotográficas, visando a reconstrução do espaço tridimensional (espaço-objeto) através de imagens bidimensionais (espaço-imagem) -- Figura 1. A

Orlando Bernardo Filho

212

Ensino de gravitação clássica no nível médio: uma proposta de abordagem e resultados preliminares  

NASA Astrophysics Data System (ADS)

O ensino de gravitação clássica é comumente realizado de maneira formal e descontextualizado da experiência com a força-peso e da história do tema. Fustigados por anos de experiência de ensino no assunto, nem sempre com bons resultados, propomos uma abordagem ancorada nos eixos: a) contextualização histórica; e b) reconhecimento do peso como a força de atração gravitacional. O primeiro eixo integra o tema no desenvolvimento cultural do ser humano, praticando a interdisciplinaridade. O segundo eixo embasa construtivamente a abordagem, levando o aluno a realizar experiências e a vivenciar o reconhecimento de uma força universal. A abordagem foi construída através das etapas: 1) análise crítica do tema em livros didáticos; 2) elaboração de um curso para professores das várias disciplinas do ensino médio, identificando conexões para a prática da interdisciplinaridade; 3) elaboração de material didático; e 4) avaliação da eficácia da abordagem. No trabalho discutimos em detalhe as quatro etapas. Como resultados, adiantamos que: tabulamos a abordagem de gravitação nos livros didáticos, ainda muito tradicional e carecedora de atividades criativas que poderiam melhor explorar esse assunto; mapeamos, junto aos professores, padrões de conceitos espontâneos e erros associados ao tema; e, no curso, adaptamos e testamos a eficiência de materiais instrucionais existentes e criamos outros novos (e.g., para trabalhar excentricidades das órbitas planetárias), além disto elaboramos roteiros e figuras para tratamentos qualitativo e quantitativo da lei da gravitação universal. As avaliações feitas pelos professores foram muito animadoras. O espaço da presente reunião será aproveitado para socializar a proposta e os resultados obtidos e para submeter o projeto à análise crítica. (PPGECNM/UFRN; PRONEX/FINEP; NUPA/USP; Temáticos/FAPESP)

Medeiros, G. C. M.; Jafelice, L. C.

2003-08-01

213

População estelar nuclear e extranuclear em galáxias Seyfert 2  

NASA Astrophysics Data System (ADS)

A luz das estrelas foi, historicamente, vista por observadores de AGNs como uma poluição inconveniente. Conseqüentemente, a informação contida nas características estelares foi, durante muito tempo, largamente omitida. Nos primeiros estudos, o método empregado para remover esta contaminação estelar foi representá-la por um template de galáxia elíptica e subtraí-la do espectro observado, restando o puro AGN como um resíduo. Hoje sabemos que não é tão simples representar essa população. Vários estudos têm mostrado a presença de formação estelar recente próxima a região nuclear de galáxias Seyfert. Neste trabalho foi revisada a abordagem tradicional, tendo-se focalizado a análise na luz estelar. Espectros óticos de fenda longa, com alta razão sinal/ruído, foram usados para estudar a variação radial das larguras equivalentes de linhas de absorção e cores do contínuo. Utilizando o método de síntese espectral de populações estelares, foram estimadas as contribuições de populações estelares de diferentes idades (e de um contínuo tipo lei de potência) para a luz integrada das galáxias, em 4020A. As principais conclusões deste trabalho são: na região nuclear, mais da metade das galáxias Seyfert 2 da amostra (57%) apresenta contribuições das populações com 100 milhões de anos ou mais jovens superior a 20% do fluxo em 4020A, enquanto que em cerca de 40% delas a componente de 3 milhões de anos (e/ou luz que provem de um núcleo ativo) tem contribuição significativa (maior do que 10%). Estas contribuições em geral decrescem quando se vai para regiões mais distantes do centro das galáxias, respectivamente 53% e 30% a 1kpc, 40% e 15% a 3kpc do centro das galáxias. Estes resultados foram comparados com aqueles obtidos para uma amostra de galáxias não ativas de mesmo tipo de Hubble das Seyfert. Em uma análise inicial nota-se que em geral as galáxias Seyfert apresentam contribuições das populações de 100 milhões de anos maiores do que aquelas encontradas nas galáxias não ativas, sugerindo uma ligação entre a formação estelar e a atividade em galáxias.

Raimann, D. I.; Storchi-Bergmann, T.; Cid Fernandes, R., Jr.; Delgado, R. M. G.; Schmitt, H.; Heckman, T.; Leitherer, C.

2003-08-01

214

Comportamento da Fundao de um Prottipo de Estrutura de Conteno em Solo Reforado com Geotxtil Notecido  

E-print Network

satisfatória as novas condições de trabalho. Com isso, para contribuir com o avanço no estado da arte, programou-se a execução, no pátio da Empresa Ober S.A, em Nova Odessa - SP, de uma série de oito protótipos

Zornberg, Jorge G.

215

EM International. Volume 1  

SciTech Connect

It is the intent of EM International to describe the Office of Environmental Restoration and Waste Management`s (EM`s) various roles and responsibilities within the international community. Cooperative agreements and programs, descriptions of projects and technologies, and synopses of visits to international sites are all highlighted in this semiannual journal. Focus on EM programs in this issue is on international collaboration in vitrification projects. Technology highlights covers: in situ sealing for contaminated sites; and remote sensors for toxic pollutants. Section on profiles of countries includes: Arctic contamination by the former Soviet Union, and EM activities with Germany--cooperative arrangements.

Not Available

1993-07-01

216

Detecção inesperada de efeitos de lentes fracas em grupos de galáxias pouco luminosos em raios-X  

NASA Astrophysics Data System (ADS)

Obtivemos, como parte do programa de verificação científica do GMOS Sul, imagens profundas de três grupos de galáxias: G97 e G102 (z~0,4) e G124 (z = 0,17). Esses alvos foram selecionados a partir do catálogo de fontes extensas de Vikhlinin (1998), por terem luminosidades em raios X menores que 3´1043 ergs s-1, valor cerca de uma ou duas ordens de grandeza inferior ao de aglomerados de galáxias. O objetivo primário dessas observações é o estudo da evolução de galáxias em grupos. Grupos são ambientes menos densos que aglomerados, contêm a grande maioria das galáxias do Universo mas que, até o momento, foram estudados detalhadamente apenas no Universo local (z~0). Com esses dados efetuamos uma análise estatística da distorção na forma das galáxias de fundo (lentes gravitacionais fracas) como forma de inferir o conteúdo e a distribuição de massa nesses grupos apesar de que, em princípio, esse efeito não deveria ser detectado uma vez que os critérios de seleção adotados previlegiam sistemas de baixa massa. De fato, para G124 obtivemos apenas um limite superior para sua massa que é compatível com sua luminosidade em raios X. De modo contrário e surpreendente, os objetos G102 e G097, aparentam ter massas que resultariam em dispersões de velocidade maiores que 1000 km s-1, muito maiores do que se espera para grupos de galáxias. Com efeito, para G097 obtivemos, a partir de dados do satélite XMM, uma estimativa para a temperatura do gás intragrupo de kT = 2,6 keV, que é tipica de sistemas com dispersões de velocidade de ~ 600 km s-1, bem característica de grupos. Essas contradições aparentes entre lentes fracas e raios X podem ser explicadas de dois modos: i) a massa obtida por lentes estaria sobreestimada devido à superposição de estruturas massivas ao longo da linha de visada ou ii) a temperatura do gás do meio intra-grupo reflete o potencial gravitacional de estruturas menores que estariam se fundindo para formar uma estrutura maior.

Carrasco, R.; Mendes de Oliveira, C.; Sodrã©, L., Jr.; Lima Neto, G. B.; Cypriano, E. S.; Lengruber, L. L.; Cuevas, H.; Ramirez, A.

2003-08-01

217

Estudo e aplicação do código de desembaraçamento espectral - Korel - em sistemas triplos  

NASA Astrophysics Data System (ADS)

O código KOREL é uma ferramenta adicional eficiente para a determinação simultânea de parâmetros orbitais espectroscópicos para o desembaraço de espectros individuais de sistemas estelares com até cinco componentes. Estudos já realizados (Torres,KBV,2002, Dissertação de Mestrado DF-ICEx-UFMG) mostram as limitações, aplicabilidade e eficiência do código para sistemas com duas componentes. Apresentamos, neste trabalho, a continuação dos estudos para sistemas com três componentes (sistemas hierárquicos), utilizando espectros sintéticos "gabaritos" de estrelas individuais em órbitas cujos parâmetros são conhecidos "a priori". Geramos os espectros compostos e verificamos como o código reproduz os parâmetros orbitais e espectros individuais em diversas situações físicas. É apresentado, ainda, uma discussão da aplicabilidade do código em sistemas reais como RV Crateris (Machado,ACM,1997, Dissertação de Mestrado DF-ICEx-UFMG), um sistema triplo cujas componentes eclipsantes estão, provavelmente, ainda na fase pré-sequência principal.

Torres, K. B. V.; Vaz, L. P. R.

2003-08-01

218

Observações no infravermelho médio de objetos estelares jovens em NGC 3576  

NASA Astrophysics Data System (ADS)

Apresentamos os resultados de observações no infravermelho médio de candidatos a objetos estelares jovens e massivos em NGC 3576. As imagens de alta resolução foram obtidas no observatório Gemini Sul com o uso dos filtros em 10,8, 7,9, 9,8, 12,5 e 18,2 mm. Nossas imagens mostram a fonte IRS 1 resolvida em 4 objetos pela primeira vez em 10 mm. Para cada objeto obtivemos a distribuição espectral de energia de 1.2 até 18 mm, bem como a temperatura de cor, a distribuição espacial e a profundidade óptica em 9,8 mm da poeira circunstelar. Apresentamos uma estimativa das massas dos objetos estudados, baseados na luminosidade emitida no infravermelho médio, bem como um modelo para explicar as diferentes características observadas de cada objeto. Finalmente discutimos a possível localização da(s) fonte(s) de ionização de NGC 3576.

Barbosa, C.; Damineli, A.; Blum, R.; Conti, P.

2003-08-01

219

Structure and Evolution of W UMa-type Systems  

NASA Astrophysics Data System (ADS)

we summarized and discussed our works on the structure and evolution of low-mass W UMa-type systems. Our works predict that the convection is by no means essential to the energy transfer in common envelope (CE) and the energy transfer probably occurs in the radiative zone of CE, and that W UMa-type systems undergo cyclic evolution and would merge into the fast-rotating single stars owing to Darwin's instability at last, and during their merging process they would lose a large amount of mass and angular momentum.

Li, Lifang; Zhang, Fenghui; Han, Zhanwen

2010-12-01

220

Photometric and polarimetric studies of three W UMa-type binaries: FZ Ori, V407 Peg and LP UMa  

NASA Astrophysics Data System (ADS)

We present analyses of new optical photometric observations of three W UMa-type contact binaries FZ Ori, V407 Peg and LP UMa. Results from the first polarimetric observations of the FZ Ori and V407 Peg are also presented. The periods of FZ Ori, V407 Peg and LP UMa are derived to be 0.399986, 0.636884 and 0.309898 d, respectively. The O- C analyses indicate that the orbital periods of FZ Ori and LP UMa have increased with the rate of 2.28×10-8 and 1.25×10-6 d yr-1, respectively and which is explained by transfer of mass between the components. In addition to the secularly increasing rate of orbital period, it was found that the period of FZ Ori has varied in sinusoidal way with oscillation period of ˜30.1 yr. The period of oscillations are most likely to be explained by the light-time effect due to the presence of a tertiary companion. Small asymmetries have been seen around the primary and secondary maxima of light curves of all three systems, which is probably due to the presence of cool/hot spots on the components. The light curves of all three systems are analysed by using Wilson-Devinney code (WD) and the fundamental parameters of these systems have been derived. The present analyses show that FZ Ori is a W-subtype, and V407 Peg and LP UMa are A-subtype of the W UMa-type contact binary systems. The polarimetric observations in B, V, R and I bands, yield average values of polarization to be 0.26±0.03, 0.22±0.02, 0.22±0.03 and 0.22±0.05 per cent for FZ Ori and 0.21±0.02, 0.29±0.03, 0.31±0.01 and 0.31±0.04 per cent for V407 Peg, respectively.

Prasad, Vinod; Pandey, J. C.; Patel, M. K.; Srivastava, D. C.

2014-10-01

221

UMA Media base Metadata Management using Oracle Database System  

E-print Network

describes the media base in a Universal Multimedia Access (UMA) test bed for handling multimedia of adapted MPEG- 4 media resources over the MPEG-21 multimedia framework. 1. Introduction As the number of different terminals is increasing, the need for content adaptation grows as well. Presenting the media

Nørvåg, Kjetil

222

Thermal Image of Halema'uma'u Vent  

USGS Multimedia Gallery

This thermal image shows the view of the Halema`uma`u vent from today's overflight. The kidney-shaped lava pond, about 90 meters long, is deep within the vent cavity. The mostly-crusted lava migrates from the north (right in this photo), where it upwells from depth, to the south, where is si...

223

Implications of Unlicensed Mobile Access (UMA) for GSM security  

Microsoft Academic Search

Despite its imperfections, GSM security has stood well the test of time. In part, this security success has relied on closed platforms that prevent the end-user from tampering with the GSM protocol stacks. While it is possible to build phones that do not have such restrictions, this is difficult due to, e.g., legislation and technical complexity. Unlicensed Mobile Access (UMA)

Sandro Grech; P. Eronen

2005-01-01

224

Halema?uma?u Crater and Rock Fall Plume  

USGS Multimedia Gallery

This image of a dusty plume produced by rocks collapsing from the wall of the eruptive vent within K?lauea Volcano’s Halema‘uma‘u Crater was captured by a USGS time-lapse camera on December 21, 2011.  Vigorous spattering on the lava lake deep within the vent created the o...

225

Equipment management system (EMS)  

Microsoft Academic Search

Equipment Management System (EMS) is a software tool used to monitor and track equipment states, restrictions and PM schedules in real time. EMS has been designed and customized to support the MOS-2 die production facility. The system provides graphical representation of the entire factory. Color coded icons represent equipment's current state (i.e. qualification, production, unscheduled maintenance, etc.). Preventative maintenance schedules

T. Yurtsever; M. Comerford

1995-01-01

226

A eficiência de formação estelar em Musca  

NASA Astrophysics Data System (ADS)

Apresentamos os resultados de um survey no infravermelho próximo (bandas J e H), executado no Laboratório Nacional de Astrofísica, na direção da nuvem escura em forma de filamento de Musca (observamos ao longo de todo o filamento, além de todas as fontes pontuais IRAS e/ou fontes ROSAT brilhantes a uma distância de 2o da nuvem). Nosso objetivo é determinar a eficiência de formação estelar para esta nuvem escura (massa de estrelas formadas/massa da nuvem), procurando por objetos estelares jovens de pequena massa no seu interior e/ou evoluídos o suficiente para estarem afastados do local de nascimento, mas ainda mostrando características de objetos pré-seqüência principal como emissão de raios-X e excesso de emissão no infravermelho próximo. Este survey não estabeleceu nenhum viés na seleção de fontes pontuais IRAS ou fontes ROSAT, uma vez que a imensa maioria das fontes pontuais IRAS nesta região têm qualidade de fluxo ruim. Os candidatos a objetos estelares jovens foram selecionados pelo excesso no índice de cor (J-H), descontados os efeitos da extinção interestelar na linha de visada, determinada através da emissão estendida no infravermelho distante (IRAS). Estimativas de massa foram feitas para estes candidatos, através da relação massa-luminosidade, para calcular a eficiência de formação estelar de Musca.

Hickel, G. R.; Vilas-Boas, J. W. S.; Roberto, A. J.., Jr.; Khan, R. P.

2003-08-01

227

Is EM dead?  

PubMed

Since electron microscopy (EM) first appeared in the 1930s, it has held centre stage as the primary tool for the exploration of biological structure. Yet, with the recent developments of light microscopy techniques that overcome the limitations imposed by the diffraction boundary, the question arises as to whether the importance of EM in on the wane. This Commentary describes some of the pioneering studies that have shaped our understanding of cell structure. These include the development of cryo-EM techniques that have given researchers the ability to capture images of native structures and at the molecular level. It also describes how a number of recent developments significantly increase the ability of EM to visualise biological systems across a range of length scales, and in 3D, ensuring that EM will remain at the forefront of biology research for the foreseeable future. PMID:24124192

Knott, Graham; Genoud, Christel

2013-10-15

228

OS RECENSEAMENTOS DEMOGRAFICOS : UMA FONTE DE INFORMAO SOBRE A FILIAO  

E-print Network

PHILIPPE WANIEZ * VIOLETTE BRUSTLEIN ** DORA RODRIGUES HEES (Colaboradora) *** N um artigo pubicado em 1997 BRUSTLEIN DORA RODRIGUES HEES (COLABORADORA) 6 técnicas ligadas à escolha de softwares de crítica automática

Boyer, Edmond

229

Influência da presença de endossimbionte em Brevipalpus phoenicis na aquisição e transmissão do vírus da leprose dos citros.  

Technology Transfer Automated Retrieval System (TEKTRAN)

A leprose dos citros destaca-se como uma fitovirose de grande impacto econômico e ambiental à citricultura, elevando o custo de produção para o controle do vetor B. phoenicis. É conhecido que a presença de endossimbiontes do gênero Cardinium em ácaros Brevipalpus spp. causa a feminilização dos ácaro...

230

Relações solo-geoambiente em áreas de ocorrências de Ipucas na planície do Médio Araguaia - Estado de Tocantins  

Microsoft Academic Search

RESUMO - Dentre as paisagens do médio rio Araguaia, destacam-se as extensas planícies e depressões sazonalmente alagadas. Nelas se inserem formações florestais higrófilas denominadas Ipucas, como enclaves peculiares pela sua fitossociologia e ambiente pedogeomorfológico. Esses fragmentos florestais naturais ocorrem na planície fluvial, em região de ecótono entre o Cerrado e a Floresta Amazônica. Neste estudo, foi selecionada uma área de

Alan Kardec Elias Martins; Carlos Ernesto G. R. Schaefer; Elias Silva; Vicente Paulo Soares; Guilherme Resende Corrêa; Bruno Araújo Furtado de Mendonça

2006-01-01

231

Compósitos Bioativos Obtidos a Partir da Inserção de Vidro Bioativo em Matriz de Poli(Metacrilato de Metila)  

Microsoft Academic Search

Resumo: Várias biocerâmicas são capazes de se ligarem a tecidos vivos (bioatividade), no entanto apresen- tam propriedades mecânicas muito diferentes daquelas exibidas por tecidos naturais. Tal fato acaba por restringir o uso desses materiais em um mais extenso número de aplicações biomédicas. Compósitos de matriz polimérica reforçada com uma fase bioativa podem combinar o comportamento bioativo caracterís- tico de algumas

Paulo E. Silva Junior; Rodrigo L. Oréfice

2001-01-01

232

População nuclear e extranuclear em rádio-galáxias  

NASA Astrophysics Data System (ADS)

A natureza do contínuo UV/ótico em rádio-galáxias é muito importante para o seu entendimento. Em baixos redshifts existem evidências de que muitas delas são dominadas no ótico por luz de estrelas velhas, características de galáxias early-type e em altos redshifts a característica dominante é um excesso de luz no UV, freqüentemente associado com estruturas que estão alinhadas aos eixos das estruturas rádio em grande escala. Inicialmente esse excesso foi interpretado como devido a episódios intensos de formação estelar nas galáxias hospedeiras. Entretanto, as descobertas dos alinhamentos entre as estruturas UV e rádio modificaram essa idéia. Foi proposto que a formação estelar é iniciada pela passagem do jato rádio através do meio interestelar das galáxias hospedeiras. A natureza do excesso UV começou a ser compreendida em um estudo detalhado do continuo ótico da 3C321, onde se concluiu que o contínuo desta galáxia tem origem multicomponente, com contribuições de populações velhas e intermediárias, de luz espalhada oriunda de um quasar obscurecido e do contínuo nebular. No presente trabalho estudamos a população nuclear e extranuclear de uma amostra de 24 rádio-galáxias, utilizando espectros óticos de fenda longa, com alta razão sinal/ruído. Através do método de síntese espectral de populações estelares, foram estimadas as contribuições de populações estelares de diferentes idades (e de um contínuo tipo lei de potência devido a um AGN, FC) para a luz integrada das galáxias, em 4020Å. As principais conclusões deste trabalho são: apenas quatro dos objetos estudados têm contribuições significativas (maiores do que 10%) das populações de 100 milhões de anos ou mais jovens (ou de FC) ao longo da região espacial estudada (6 kpc centrais); nenhuma das rádio-galáxias de tipo FRI estudadas tem contribuição significativa destas populações ao longo desta região; duas (de oito) de tipo FRII tem contribuições significativas da luz que vem do AGN, na região nuclear; uma tem contribuição significativa das populações de 100 milhões de anos e mais jovens ao longo dos 4 kpc centrais, indicando claramente a presença de formação estelar recente. Comparando estes resultados com aqueles obtidos para uma amostra de galáxias não ativas de mesmo tipo de Hubble das rádio, encontramos que a principal diferença entre as duas amostras está na contribuição da população de 1 bilhão de anos, geralmente maior nas rádio-galáxias.

Raimann, D. I.; Storchi-Bergmann, T.; Quintana, H.; Alloin, D.; Hunstead, R.; Wisotzki, L.

2003-08-01

233

ANÁLISE DAS FINANÇAS DE UMA EMPRESA VIRTUAL DE VAREJO: UMA ABORDAGEM INTERDISCIPLINAR PARA DIAGNÓSTICO E APURAÇÃO DO DESEMPENHO ORGANIZACIONAL  

Microsoft Academic Search

A partir da coleta de série histórica da Demonstração de Resultado do Exercício da empresa B2W avaliaram-se as suas despesas com as vendas, as despesas financeiras, deduzidas das receitas, as despesas gerais e administrativas, com isso foi possível perceber que apesar da empresa apresentar uma crescente no seu faturamento bruto, o seu lucro está diminuindo por algumas razões, principalmente no

Ailson Renan Santos Picanço; Fernanda Silva de Assis França; Leandro Dela Flora Cruz; Lirha Freitas Santos; Heriberto Wagner Amanajás Pena

2012-01-01

234

Código para imageamento indireto de estrelas em sistemas binarios: simulação de variações elipsoidais e do perfil das linhas  

NASA Astrophysics Data System (ADS)

As estrelas secundárias em variáveis cataclí smicas (VCs) e binárias-x de baixa massa (BXBMs) são cruciais para o entendimento da origem, evolução e comportamento destas binárias interagentes. Elas são estrelas magneticamente ativas submetidas a condições ambientais extremas [e.g., estão muito próximas de uma fonte quente e irradiante; têm rotação extremamente rápida e forma distorcida; estão perdendo massa a taxas de 10-8-10-10 M¤/ano] que contribuem para que suas propriedades sejam distintas das de estrelas de mesma massa na seqüência principal. Por outro lado, o padrão de irradiação na face da secundária fornece informação sobre a geometria das estruturas de acréscimo em torno da estrela primária. Assim, a obtenção de imagens da superfície destas estrelas é de grande interesse astrofísico. A Tomografia Roche usa as variações no perfil das linhas de emissão/absorção da estrela secundária em função da fase orbital para mapear a distribuição de brilho em sua superfície. Neste trabalho apresentamos os resultados iniciais do desenvolvimento de um programa para o mapeamento da distribuição de brilho na superfí cie das estrelas secundárias em VCs e BXBMs com técnicas de astro-tomografia. Presentemente temos em operação um código que simula as variações no perfil das linhas em conseqüência de efeito Doppler resultante da combinação de rotação e translação de uma estrela em forma de lobo de Roche em torno do centro de massa da binária, em função da distribuição de brilho na superfície desta estrela. O código igualmente produz a curva de luz resultante das variações de aspecto da estrela em função da fase orbital (variações elipsoidais).

Souza, T. R.; Baptista, R.

2003-08-01

235

Environmental Media Services (EMS)  

NSDL National Science Digital Library

Environmental Media Services (EMS) is a nonprofit communications clearinghouse committed to the expansion of media coverage on critical environmental and public health issues. True to their mission, EMS staff "build relationships with top scientists, physicians, and other experts to bring journalists the latest and most credible information." EMS's modest homepage is free of clutter but full of content. While several sections are under construction and updates (currently) appear irregular, a series of available articles provides useful summaries of important environmental news issues over the past six months. Current articles include "The impacts of global warming on the oceans" and "Cool companies," among others.

236

CC Sculptoris: Eclipsing SU UMa-type intermediate polar  

NASA Astrophysics Data System (ADS)

We observed the 2014 superoutburst of the SU UMa-type intermediate polar CC Scl. We detected superhumps with a mean period of 0.05998(2) d during the superoutburst plateau and during three nights after the fading. During the post-superoutburst stage after three nights, a stable superhump period of 0.059523(6) d was detected. We found that this object is an eclipsing system with an orbital period of 0.058567233(8) d. By assuming that the disk radius in the post-superoutburst phase is similar to those in other SU UMa-type dwarf novae, we obtained a mass ratio of q = 0.072(3) from the dynamical precession rate of the accretion disk. The eclipse profile during outbursts can be modeled by an inclination of 80.6°6 ± 0.5°. The 2014 superoutburst was preceded by a precursor outburst and the overall appearance of the outburst was similar to superoutbursts in ordinary SU UMa-type dwarf novae. We showed that the standard thermal-tidal instability model can explain the outburst behavior in this system and suggest that inner truncation of the disk by magnetism of the white dwarf does not strongly affect the behavior in the outer part of the disk.

Kato, Taichi; Hambsch, Franz-Josef; Oksanen, Arto; Starr, Peter; Henden, Arne

2015-02-01

237

Transmission electron microscopic observations on ultrastructural alterations in Schistosoma mansoni adult worms recovered from C57BL/6 mice treated with radiation-attenuated vaccine and/or praziquantel in addition to passive immunization with normal and vaccinated rabbit sera against infection.  

PubMed

Although the current treatment of schistosomiasis relies largely on praziquantel (PZQ), it has not been successful in significantly reducing the overall rate of disease cases, one of the suggested reasons being the inevitable resistance to PZQ. Previous studies showed that radiation-attenuated vaccine provides protection against Schistosoma mansoni in a host of various species. In the present study, we evaluated the effect of various vaccination strategies in C57BL/6 mice, including single or multiple vaccination strategy, subcurative dose (20 mg/kg) of PZQ, and a combination of single vaccination with subcurative dose of PZQ. Treatment either with subcurative dose of PZQ or with a single vaccination of attenuated cercariae (500 per mouse), caused significant reduction in total worm burden, hepatic, and intestinal ova counts of 43.03, 73.2, and 59.5 and 37.97, 52.02, and 26.3 %, respectively. Furthermore, tegumental changes were observed. In multiple vaccinated group, there was an extensive lysis in tegumental layers. High deformations in gastrodermis, testis cells, vitelline cells, and oocytes were recorded. Also, this study is to explore the role of humoral immunity using highly resistant rabbits that had been exposed to three immunizations with ultraviolet (UV)-irradiated cercariae (8000 per rabbit in each immunization), and their sera were tested for their ability to transfer protection. The reduction in challenge worm burden had reached 32.76-43.64 % when compared with recipients of normal serum or no serum. The reduction in hepatic and intestinal ova counts reached to 74.4 and 71.08 % in group immunized with vaccinated rabbit sera. Swelling and extensive lysis of tegumental layers, gastrodermis lumen, spermatocytes, and deformation of oocytes were recorded with more severity than that recorded in normal rabbit sera group. Our findings recorded that multiple vaccination strategy is the most effective strategy then passive transfer of vaccinated rabbit. This gives guiding in the design the appropriate therapeutic strategy. PMID:25786393

El-Shabasy, Eman A; Reda, Enayat S; Abdeen, Sherif H; Said, Ashraf E; Ouhtit, Allal

2015-04-01

238

SOBRE O PROCESSO DE MEDIAÇÃO SOCIAL NOS PROJETOS DE DESENVOLVIMENTO: UMA REFLEXÃO TEÓRICA  

Microsoft Academic Search

A mediação social é um tema que nos últimos anos vem ganhando espaço nas discussões sobre o desenvolvimento rural, mais especificamente, nas questões referentes à intervenção para o desenvolvimento. Este processo compreende uma relação que se apresenta como uma “via de mão dupla”, ou seja, a via representa a relação, uma das mãos é os mediadores, e a outra é

Cidonea Machado Deponti; Jalcione Almeida

2008-01-01

239

Novas estratgias comunicativas como fator de qualidade na interao de surdos em um sistema organizacional  

E-print Network

122 Novas estratégias comunicativas como fator de qualidade na interação de surdos em um sistema formulário web e verificar se o uso de novas estratégias comunicativas melhora a interação dos surdos. Foram (MAC), uma com a interface original do sistema, e outra com o uso de novas estratégias comunicativas

Barbosa, Alberto

240

Uma Proposta de Modelo para Objetos de Aprendizagem  

Microsoft Academic Search

Resumo. Algumas políticas públicas têm impulsionado o desenvolvimento de material digital para uso como recurso no processo de ensino e aprendizagem, incentivando o surgimento de várias equipes, cujos produtos desenvolvidos tendem a se concentrar em repositórios para que sejam acessíveis ao públicoalvo. Muitas vezes o entendim ento de quais elementos devem estar presentes num objeto varia entre as equipes, dificultando

Santos Rosa; Rogério Avellar Cordeiro; Darcy Ribeiro

241

Histerese no comércio internacional brasileiro: uma análise por modelos ARFIMA  

Microsoft Academic Search

Após a abertura comercial em 1998, grandes mudanças ocorreram no comércio exterior nacional devido sucessivos choques cambiais aos quais a economia foi exposta. A literatura de referência sugere que grandes choques na taxa de câmbio induzem mudanças persistentes na relação entre a taxa de câmbio e o comércio. Este fenômeno é conhecido por histerese. Desta forma, o objetivo deste trabalho

Sinezio Fernandes Maia; Roberto Wagner Jubert; Marcia Cristina Paixao

2008-01-01

242

Hydrodynamical Models of Accretion Disks in SU UMa Systems  

NASA Astrophysics Data System (ADS)

We numerically test the mode-coupling model (Lubow 1991a) of tidal instability in SU UMa systems. So far, all numerical models confirming it have been based on SPH codes and isothermal equation of state. In our paper we present Eulerian models, using both isothermal approximation and the full energy equation. We also investigate influence of different ways of mass transfer. While isothermal models behave similarly to SPH simulations, the behavior of models with full energy equation is quite different, and the mode-coupling model is not confirmed in this case.

Kornet, Kacper; Rozyczka, Michal

2000-06-01

243

Variação temporal do gradiente radial de o/h a partir de uma amostra de nebulosas planetárias  

NASA Astrophysics Data System (ADS)

Gradientes radiais de abundância são observados no disco de nossa Galáxia e também em outras galáxias espirais. No caso da Galáxia, o principal problema relativo aos gradientes é sua variação temporal, que constitui um dos principais vínculos aos modelos de evolução química da Galáxia. As nebulosas planetárias são particularmente interessantes no estudo dos gradientes e suas variações, tanto espaciais como temporais. São objetos brilhantes, podendo ser observadas a grandes distâncias, e têm abundâncias relativamente precisas de diversos elementos químicos. Além disso, sendo originadas de estrelas com massas entre 0.8 e 8 massas solares na sequência principal, incluem objetos com idades e populações diferentes, o que as torna especialmente interessantes ao estudo da variação temporal dos gradientes. Neste trabalho, apresentamos resultados recentes sobre a variação temporal do gradiente de O/H a partir de uma amostra contendo cerca de 200 nebulosas, para as quais obtivemos distâncias por métodos estatísticos. As abundâncias foram parcialmente obtidas a partir de observações em Itajubá e La Silla, sendo as restantes obtidas da literatura. Os resultados mostram, pela primeira vez, evidências de um achatamento do gradiente de O/H, de -0.11 dex/kpc para -0.06 dex/kpc nos últimos 9 giga-anos ou de -0.08 dex/kpc para -0.06 dex/kpc nos últimos 5 giga-anos. Esses valores apresentam um bom acordo com alguns modelos recentes para a evolução química da Galáxia. (FAPESP/CNPq)

Maciel, W. J.; Costa, R. D. D.; Uchida, M. M. M.

2003-08-01

244

Vínculos sobre um modelo de quartessência de Chaplygin usando observações do satélite chandra da fração de massa de gás em aglomerados de galáxias  

NASA Astrophysics Data System (ADS)

Observações de Supernovas do tipo Ia mostram que a expansão do Universo está acelerando. Segundo as equações de Einstein uma componente com pressão negativa (energia escura) é necessária para explicar a aceleração cósmica. Além da energia escura é usualmente admitido que no Universo há também uma matéria exótica com pressão zero, que é chamada de matéria escura. Essa componente possui um papel fundamental na formação de estruturas no Universo. Recentemente tem se explorado a possibilidade de que matéria e energia escura poderiam ser unificadas através de uma única componente, que tem sido denominada de quartessência. Um exemplo de fluido com essas características é o Gás de Chaplygin Generalizado, que possui uma equação de estado da forma p = -A/ra. Inicialmente consideramos o caso especial a = 1 (gás de Chaplygin) e vinculamos parâmetros do modelo utilizando observações em raios-X do satélite Chandra da fração de massa de gás em aglomerados de galáxias. Uma comparação dos vínculos obtidos com esse teste com outros testes, tais como supernovas e idade do Universo, mostra que esse teste é bastante restritivo. Exibiremos ainda resultados para o caso em que a curvatura é nula e o parâmetro a está compreendido no intervalo -1 < a 1.

de Souza, R. S.

2003-08-01

245

National EMS Research Agenda.  

PubMed

Now, more than ever before, the spirit of the emergency services professional is recognized by people everywhere. Individuals from every walk of life comprehend the reality of the job these professionals do each day. Placing the safety of others above their own is their acknowledged responsibility. Rescue and treatment of ill and injured patients are their purpose as well as their gratification. The men and women who provide prehospital care are well aware of the unpredictable nature of emergency medical services (EMS). Prehospital care is given when and where it is needed: in urban settings with vertical challenges and gridlock; in rural settings with limited access; in confined spaces; within entrapments; or simply in the street, exposed to the elements. Despite the challenges, EMS professionals rise to the occasion to do their best with the resources available. Despite more than 30 years of dedicated service by thousands of EMS professionals, academic researchers, and public policy makers, the nation's EMS system is treating victims of illness and injury with little or no evidence that the care they provide is optimal. A national investment in the EMS research infrastructure is necessary to overcome obstacles currently impeding the accumulation of essential evidence of the effectiveness of EMS practice. Funding is required to train new researchers and to help them establish their careers. Financial backing is needed to support the development of effective prehospital treatments for the diseases that drive the design of the EMS system, including injury and sudden cardiac arrest. Innovative strategies to make EMS research easier to accomplish in emergency situations must be implemented. Researchers must have access to patient outcome information in order to evaluate and improve prehospital care. New biomedical and technical advances must be evaluated using scientific methodology. Research is the key to maintaining focus on improving the overall health of the community in a competitive and cost-conscious health care market. Most importantly, research is essential to ensure that the best possible patient care is provided in the prehospital setting. The bravery and dedication of EMS professionals cannot be underestimated. Images of firefighters, EMS personnel, and others going into danger while others are evacuating will remain burned in our collective consciousness. These professionals deserve the benefit of research to assist them in providing the best possible care in the challenging circumstances they encounter. With this document, we are seeking support for elevating the science of EMS and prehospital care to the next level. It is essential that we examine innovative ways to deliver prehospital care. Strategies to protect the safety of both the patient and the public safety worker must be devised and tested. There are many questions that remain to be asked, many practices to be evaluated, and many procedures to be improved. Research is the key to obtaining the answers. PMID:12108581

Sayre, M R; White, L J; Brown, L H; McHenry, S D

2002-01-01

246

Uma simulao do QuicktimeVR para mundos poligonais  

E-print Network

a tecnologia de image-based rendering para realidade virtual. Essa abordagem consiste em se obter um número de ressaltar que a tecnologia de image-based rendering se propõe a reconstruir visões do ambiente e não o ambiente propriamente dito. #12;3 Essa tecnologia no entanto é relativamente nova e muito ainda há que ser

247

......... em o Moscow, Idaho  

E-print Network

#12;#12;#12;#12;#12;......... em o #12;'"''!.. . ' I The UNIVERSITY of IDAHO Moscow, Idaho Editors Donald W. Samuelson, who strode purposefully out of the North, became Idaho's leading gentle- man will determine his place in Idaho history. Perhaps no governor of a Western state has more complex

O'Laughlin, Jay

248

by EM tomography  

Microsoft Academic Search

We have studied the in vitro reconstitution of sperm nuclei and small DNA templates to mitotic chroma- tin in Xenopus laevis egg extracts by three-dimensional (3D) electron microscopy (EM) tomography. Using specif- ically developed software, the reconstituted chromatin was interpreted in terms of nucleosomal patterns and the overall chromatin connectivity. The condensed chromatin formed

Peter König; Michael B. Braunfeld; John W. Sedat; David A. Agard

249

Recent developments on SU UMa stars - theory vs. observation  

NASA Astrophysics Data System (ADS)

Kepler light curves of short period dwarf novae have resparked interest in the nature of superoutbursts and led to the question: Is the thermal-tidal instability needed, or can the plain vanilla version of the accretion disk limit cycle do the job all by itself? A detailed time-resolved study of an eclipsing SU UMa system during superoutburst onset should settle the question - if there is a dramatic contraction of the disk at superoutburst onset, Osaki's thermal-tidal model would be preferred; if not, the plain disk instability model would be su?cient. I will present recent results that support the contention by Osaki & Kato that the time varying negative superhump frequencies can be taken as a surrogate for the outer disk radius variations. Finally, it may be necessaryto look beyond the short period dwarf novae to gain perspective on the nature of embedded precursors in long outbursts.

Cannizzo, John K.

2015-01-01

250

Uma forma bidimensional que maximiza a resistência aerodinâmica newtoniana  

E-print Network

(English) In a previous work [Nonlinearity, 20:2271-2287, 2007; arXiv:math/0703895] it is investigated, by means of computational simulations, shapes of nonconvex bodies that maximize resistance to its motion on a rarefied medium, considering that bodies are moving forward and at the same time slowly rotating. Here the previous results are improved: we obtain a two-dimensional geometric shape that confers to the body a resistance very close to the supremum value (R=1.4965novas investiga\\c{c}\\~oes que culminam num resultado que representa um grande avan\\c{c}o qualitativo relativamente aos previamente alcan\\c{c}ados. Esse resultado, que agora se apresenta, consiste numa forma bidimensional que confere ao corpo uma resist\\^encia muito pr\\'oxima do seu limite te\\'orico.

Paulo D. F. Gouveia; Alexander Plakhov; Delfim F. M. Torres

2007-09-21

251

Uma Aula Prtica sobre LISP Siang Wun Song -Universidade de So Paulo -IME/USP  

E-print Network

Uma Aula Prática sobre LISP Siang Wun Song - Universidade de São Paulo - IME/USP MAC 5710 - Estruturas de Dados - 2008 Siang Wun Song - Universidade de São Paulo - IME/USP Uma Aula Prática sobre LISP. Coletor de lixo faz parte do sistema. Siang Wun Song - Universidade de São Paulo - IME/USP Uma Aula

Song, Siang Wun

252

On ambiente de binárias de pequena massa em formação: o caso do glóbulo cometário CG30 e IRAS08076-3556  

NASA Astrophysics Data System (ADS)

Neste trabalho, combinamos observações de polarização linear no óptico (banda R), dados no infravermelho distante (IRAS) e observações de transições moleculares em radiofreqüências (CO e espécies isotópicas, HCN e HCO+) para analisar o glóbulo cometário (GC) CG30 (na região da IRAS Vela Shell), que apresenta objetos Herbig-Haro e ejeções de matéria, além de uma fonte pontual IRAS em seu interior. Os objetivos deste estudo são: determinar a eficiência de formação estelar nos glóbulos cometários, através da relação entre a massa total do GC e da massa das estrelas em formação; determinar como o campo magnético influencia na formação de estrelas no interior destes objetos; e analisar as modificações que ejeções de matéria de estrelas em formação causam no gás e no campo magnético dos GCs. Combinando nossos dados com trabalhos já publicados, mostramos que CG30 tem uma eficiência de formação estelar em torno de 3%; que o campo magnético é importante na manutenção da estrutura global do GC e demonstra sinais de torção e compressão; e que a ejeção bipolar de matéria das estrelas do par formam uma ejeção quadripolar, a qual influencia na densidade e temperatura do gás e no grau de polarização dos grãos de poeira associados ao gás do GC.

Hickel, G. R.; Vilas-Boas, J. W. S.

2003-08-01

253

The EM Earthquake Precursor  

NASA Astrophysics Data System (ADS)

Many attempts have been made to determine a sound forecasting method regarding earthquakes and warn the public in turn. Presently, the animal kingdom leads the precursor list alluding to a transmission related source. By applying the animal-based model to an electromagnetic (EM) wave model, various hypotheses were formed, but the most interesting one required the use of a magnetometer with a differing design and geometry. To date, numerous, high-end magnetometers have been in use in close proximity to fault zones for potential earthquake forecasting; however, something is still amiss. The problem still resides with what exactly is forecastable and the investigating direction of EM. After the 1989 Loma Prieta Earthquake, American earthquake investigators predetermined magnetometer use and a minimum earthquake magnitude necessary for EM detection. This action was set in motion, due to the extensive damage incurred and public outrage concerning earthquake forecasting; however, the magnetometers employed, grounded or buried, are completely subject to static and electric fields and have yet to correlate to an identifiable precursor. Secondly, there is neither a networked array for finding any epicentral locations, nor have there been any attempts to find even one. This methodology needs dismissal, because it is overly complicated, subject to continuous change, and provides no response time. As for the minimum magnitude threshold, which was set at M5, this is simply higher than what modern technological advances have gained. Detection can now be achieved at approximately M1, which greatly improves forecasting chances. A propagating precursor has now been detected in both the field and laboratory. Field antenna testing conducted outside the NE Texas town of Timpson in February, 2013, detected three strong EM sources along with numerous weaker signals. The antenna had mobility, and observations were noted for recurrence, duration, and frequency response. Next, two directional techniques were employed, resulting in three mapped, potential epicenters. The remaining, weaker signals presented similar directionality results to more epicentral locations. In addition, the directional results of the Timpson field tests lead to the design and construction of a third prototype antenna. In a laboratory setting, experiments were created to fail igneous rock types within a custom-designed Faraday Cage. An antenna emplaced within the cage detected EM emissions, which were both reproducible and distinct, and the laboratory results paralleled field results. With a viable system and continuous monitoring, a fracture cycle could be established and observed in real-time. Sequentially, field data would be reviewed quickly for assessment; thus, leading to a much improved earthquake forecasting capability. The EM precursor determined by this method may surpass all prior precursor claims, and the general public will finally receive long overdue forecasting.

Jones, K. B., II; Saxton, P. T.

2013-12-01

254

A distribuição de velocidades na linha de visada em galáxias barradas vistas de face  

NASA Astrophysics Data System (ADS)

Com o objetivo de realizar um estudo cinemático da componente vertical de barras em galáxias, obtivemos espectros de fenda longa de alta razão S/N ao longo dos eixos maior e menor de 14 galáxias barradas vistas de face, nos telescópios de 1.52m do ESO em La Silla, Chile, e de 2.3m do Steward Observatory em Kitt Peak, Arizona. Estes dados nos permitiram determinar a distribuição de velocidades das estrelas ao longo do eixo vertical das barras e discos destes sistemas, tanto no centro como em pontos que distam cerca de 5 e 20 segundos de arco do núcleo, correspondendo a distâncias de cerca de 0.7 e 2.8 kpc, respectivamente. Desta forma, a variação radial da distribuição de velocidades também pôde ser avaliada. Este tipo de análise tem raros exemplos na literatura por ser caro em termos de tempo de telescópio. Entretanto, é de fácil justificativa, considerando que traz novas informações que podem ser utilizadas para aperfeiçoar modelos teóricos acerca da formação e evolução de galáxias. Um algoritmo por nós desenvolvido foi utilizado para obter as distribuições de velocidades como Gaussianas generalizadas (polinômios de Gauss-Hermite), o que traz um ingrediente a mais neste tipo de estudo que, tradicionalmente, se utiliza de Gaussianas puras, uma hipótese nem sempre razoável. Apresentaremos os resultados deste trabalho, que incluem um diagnóstico para a identificação de barras recém formadas, e testes para o modelo isotérmico de discos. Mostraremos que: (i) a escolha das estrelas padrão em velocidade, e dos parâmetros da Gaussiana, deve ser muito bem justificada já que tem influência significativa nos resultados; (ii) muitas galáxias apresentam uma depressão na dispersão de velocidades na região central, que pode estar associada a um disco interno; e (iii) a dispersão de velocidades é constante ao longo da barra, nos eixos maior e menor, mas cai substancialmente quando se passa da barra para o disco.

Gadotti, D. A.; de Souza, R. E.

2003-08-01

255

Determinantes da mortalidade neonatal de uma coorte de nascidos vivos em Passo Fundo - RS, 2003-2004  

Microsoft Academic Search

Introduction: Similarly to other regions of the state and of the country, the city of Passo Fundo in south Brazil has been presenting a greater expression of the neonatal component of the Infant Mortality Rate. In order to enhance the measures to be taken to change this fact, it is fundamental to identify its determinants. Objective: to investigate the social

MARA DILL MIGOTT; IONARA B. MARTINELLI; MAGDA LAHORGUE; LORENA TERESINHA; CONSALTER GEIB; Rua Tiradentes

256

UMA ABORDAGEM SOCIOCOGNITIVA E SOCIODISCURSIVA DA EVIDENCIALIDADE NA CONSTRUÇÃO DE ARGUMENTOS EM TEXTOS DE OPINIÃO DE CRIANÇAS  

Microsoft Academic Search

This article pretends to investigate how 8-11 year-old students deal with the task of writin g opinion text in a public school context. The investigation focuses the sociocognitive, linguistic, discursive and pragmatic aspects of this language action, related to the epi stemological stance of the writer when expressing t he status of arguments to defend a position. The study tries

Terezinha BARROSO

257

Bioterrorism awareness for EMS.  

PubMed

It is important to understand that the issues surrounding bioterrorism and all weapons of mass destruction are complex. In an effort to enhance response to such events, EMS should handle all incidents from the perspective of an all-hazards approach. Prevention, preparation, response and recovery are essential to the safe mitigation of all incidents. Organizations must be prepared. Plan now for a safer tomorrow. Your personnel and communities depend on you. PMID:15131906

Patrick, Richard W

2004-04-01

258

A imagem é uma arma: a propósito de riscos e rabiscos no Bairro Alto  

Microsoft Academic Search

O artigo que aqui se inicia parte de uma reflexão mais genérica sobre a imagem e a visualidade na cidade, para se centrar num exemplo que considero particularmente interessante para o estudo das dinâmicas contemporâneas de apropriação do espaço urbano que recorrem a dispositivos de natureza visual1. A cidade é, neste contexto, tomada como artefacto cultural, uma fabricação histórica participada

Ricardo Campos

259

Detailed modelling and dynamic simulation of the deployment of the MBB unfurlable antenna UMA  

Microsoft Academic Search

The purpose of this study was to investigate the dynamics during deployment of large antenna reflectors with the multi body simulation code FEDEM (Finite Element Dynamics in Elastic Mechanisms). The 'Unfurlable Mesh Antenna' (UMA) from MBB was taken as an example to encounter and solve real problems. The UMA has a ribmesh type reflector. The design concept consists of 8

L. E. Bjorset; J. Krabberod; O. I. Sivertsen

1993-01-01

260

View From The Active Lava Surface in Halema'uma'u Crater  

USGS Multimedia Gallery

Following several collapses and small explosive events that deposited spatter on the floor of Halema'uma'u crater around noon, the lava surface in Halema'uma'u was roiling and agitated for the remainder of the afternoon, with numerous points of upwelling and spattering....

261

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM CINCIAS E TECNOLOGIAS EM SADE  

E-print Network

1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIAS E TECNOLOGIAS EM SAÚDE EDITAL N. 01/2011 SELEÇÃO DE CANDIDATOS ÀS VAGAS DO PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIAS E TECNOLOGIAS EM. PREÂMBULO 1.1 A Coordenadora do Programa de Pós-Graduação em Ciências e Tecnologias em Saúde, no uso de suas

Maier, Rudolf Richard

262

CCD Photometry of the W UMa type star QX Andromeda  

NASA Astrophysics Data System (ADS)

We present new B- and V-band photometry of the W UMa-type binary system QX And, which is a member of the open cluster NGC 752. Revised orbital period and new ephemerides were given for the binary system based on the data of times of light minima. The result of a period analysis reveals that the system is undergoing a continuous orbital period increase during the past decades. The rate of period increasing turns out to be about 2.7 × 10 -7 d yr -1. With the Wilson-Devinney code, a photometric solution is computed. It yields a contact configuration for the system with a filling factor of 0.361. Combining the results from the photometric solution along with that from the radial-velocity observations, we have determined the absolute parameters for the two components of the system. The masses, radii and luminosity of the primary and secondary stars are calculated as 1.43 ± 0.04 M?, 1.45 ± 0.09 R?, 2.87 ± 0.40 L? and 0.44 ± 0.02 M?, 0.87 ± 0.05 R?, 0.99 ± 0.13 L?, respectively. The evolutionary status and physical nature of the contact binary system were discussed compared with the theoretical models.

Ren, A. B.; Zhang, X. B.; Luo, C. Q.; Luo, Y. P.; Deng, L. C.; Luo, Z. Q.

2011-04-01

263

MESTRADO EM MICROBIOLOGIA INOVAO, EMPREENDEDORISMO E TRANSFERNCIA DE TECNOLOGIA EM  

E-print Network

MESTRADO EM MICROBIOLOGIA INOVAÇÃO, EMPREENDEDORISMO E TRANSFERÊNCIA DE TECNOLOGIA EM MICROBIOLOGIA conceitos sobre os princípios e metodologias da moderna Transferência de Tecnologia. Assim, inclui-se numa alunos aprendem por realização real e directa do processo de transferência de tecnologia, utilizando

Instituto de Sistemas e Robotica

264

Spectroscopic Metallicity Determinations for W UMa-type Binary Stars  

NASA Astrophysics Data System (ADS)

This study is the first attempt to determine the metallicities of W UMa-type binary stars using spectroscopy. We analyzed about 4500 spectra collected at the David Dunlap Observatory. To circumvent problems caused by the extreme spectral line broadening and blending and by the relatively low quality of the data, all spectra were subject to the same broadening function (BF) processing to determine the combined line strength in the spectral window centered on the Mg I triplet between 5080 Å and 5285 Å. All individual integrated BFs were subsequently orbital-phase averaged to derive a single line-strength indicator for each star. The star sample was limited to 90 W UMa-type (EW) binaries with the strict phase-constancy of colors and without spectral contamination by spectroscopic companions. The best defined results were obtained for an F-type sub-sample (0.32 < (B - V)0 < 0.62) of 52 binaries for which integrated BF strengths could be interpolated in the model atmosphere predictions. The logarithmic relative metallicities, [M/H], for the F-type sub-sample indicate metal abundances roughly similar to the solar metallicity, but with a large scatter which is partly due to combined random and systematic errors. Because of the occurrence of a systematic color trend resulting from inherent limitations in our approach, we were forced to set the absolute scale of metallicities to correspond to that derived from the m 1 index of the Strömgren uvby photometry for 24 binaries of the F-type sub-sample. The trend-adjusted metallicities [M/H]1 are distributed within -0.65 < [M/H]1 < +0.50, with the spread reflecting genuine metallicity differences between stars. One half of the F-sub-sample binaries have [M/H]1 within -0.37 < [M/H]1 < +0.10, a median of -0.04 and a mean of -0.10, with a tail toward low metallicities, and a possible bias against very high metallicities. A parallel study of kinematic data, utilizing the most reliable and recently obtained proper motion and radial velocity data for 78 binaries of the full sample, shows that the F-type sub-sample binaries (44 stars with both velocities and metallicity determinations) have similar kinematic properties to solar-neighborhood, thin-disk dwarfs with space velocity component dispersions: ?U = 33 km s-1, ?V = 23 km s-1 and ?W = 14 km s-1. FU Dra with a large spatial velocity, V tot = 197 km s-1 and [M/H]1 = -0.6 ± 0.2, appears to be the only thick-disk object in the F-type sub-sample. The kinematic data indicate that the F-type EW binaries are typical, thin-disk population stars with ages about 3-5.5 Gyr. The F-type binaries that appear to be older than the rest tend to have systematically smaller mass ratios than most of the EW binaries of the same period. Based on observations obtained at the David Dunlap Observatory, University of Toronto.

Rucinski, Slavek M.; Pribulla, Theodor; Budaj, Ján

2013-09-01

265

SPECTROSCOPIC METALLICITY DETERMINATIONS FOR W UMa-TYPE BINARY STARS  

SciTech Connect

This study is the first attempt to determine the metallicities of W UMa-type binary stars using spectroscopy. We analyzed about 4500 spectra collected at the David Dunlap Observatory. To circumvent problems caused by the extreme spectral line broadening and blending and by the relatively low quality of the data, all spectra were subject to the same broadening function (BF) processing to determine the combined line strength in the spectral window centered on the Mg I triplet between 5080 A and 5285 A. All individual integrated BFs were subsequently orbital-phase averaged to derive a single line-strength indicator for each star. The star sample was limited to 90 W UMa-type (EW) binaries with the strict phase-constancy of colors and without spectral contamination by spectroscopic companions. The best defined results were obtained for an F-type sub-sample (0.32 < (B - V){sub 0} < 0.62) of 52 binaries for which integrated BF strengths could be interpolated in the model atmosphere predictions. The logarithmic relative metallicities, [M/H], for the F-type sub-sample indicate metal abundances roughly similar to the solar metallicity, but with a large scatter which is partly due to combined random and systematic errors. Because of the occurrence of a systematic color trend resulting from inherent limitations in our approach, we were forced to set the absolute scale of metallicities to correspond to that derived from the m{sub 1} index of the Stroemgren uvby photometry for 24 binaries of the F-type sub-sample. The trend-adjusted metallicities [M/H]{sub 1} are distributed within -0.65 < [M/H]{sub 1} < +0.50, with the spread reflecting genuine metallicity differences between stars. One half of the F-sub-sample binaries have [M/H]{sub 1} within -0.37 < [M/H]{sub 1} < +0.10, a median of -0.04 and a mean of -0.10, with a tail toward low metallicities, and a possible bias against very high metallicities. A parallel study of kinematic data, utilizing the most reliable and recently obtained proper motion and radial velocity data for 78 binaries of the full sample, shows that the F-type sub-sample binaries (44 stars with both velocities and metallicity determinations) have similar kinematic properties to solar-neighborhood, thin-disk dwarfs with space velocity component dispersions: {sigma}U = 33 km s{sup -1}, {sigma}V = 23 km s{sup -1} and {sigma}W = 14 km s{sup -1}. FU Dra with a large spatial velocity, V{sub tot} = 197 km s{sup -1} and [M/H]{sub 1} = -0.6 {+-} 0.2, appears to be the only thick-disk object in the F-type sub-sample. The kinematic data indicate that the F-type EW binaries are typical, thin-disk population stars with ages about 3-5.5 Gyr. The F-type binaries that appear to be older than the rest tend to have systematically smaller mass ratios than most of the EW binaries of the same period.

Rucinski, Slavek M. [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4 (Canada); Pribulla, Theodor; Budaj, Jan, E-mail: rucinski@astro.utoronto.ca, E-mail: pribulla@ta3.sk, E-mail: budaj@ta3.sk [Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranska Lomnica (Slovakia)

2013-09-15

266

Identified EM Earthquake Precursors  

NASA Astrophysics Data System (ADS)

Many attempts have been made to determine a sound forecasting method regarding earthquakes and warn the public in turn. Presently, the animal kingdom leads the precursor list alluding to a transmission related source. By applying the animal-based model to an electromagnetic (EM) wave model, various hypotheses were formed, but the most interesting one required the use of a magnetometer with a differing design and geometry. To date, numerous, high-end magnetometers have been in use in close proximity to fault zones for potential earthquake forecasting; however, something is still amiss. The problem still resides with what exactly is forecastable and the investigating direction of EM. After a number of custom rock experiments, two hypotheses were formed which could answer the EM wave model. The first hypothesis concerned a sufficient and continuous electron movement either by surface or penetrative flow, and the second regarded a novel approach to radio transmission. Electron flow along fracture surfaces was determined to be inadequate in creating strong EM fields, because rock has a very high electrical resistance making it a high quality insulator. Penetrative flow could not be corroborated as well, because it was discovered that rock was absorbing and confining electrons to a very thin skin depth. Radio wave transmission and detection worked with every single test administered. This hypothesis was reviewed for propagating, long-wave generation with sufficient amplitude, and the capability of penetrating solid rock. Additionally, fracture spaces, either air or ion-filled, can facilitate this concept from great depths and allow for surficial detection. A few propagating precursor signals have been detected in the field occurring with associated phases using custom-built loop antennae. Field testing was conducted in Southern California from 2006-2011, and outside the NE Texas town of Timpson in February, 2013. The antennae have mobility and observations were noted for recurrence, duration, and frequency response. At the Southern California field sites, one loop antenna was positioned for omni-directional reception and also detected a strong First Schumann Resonance; however, additional Schumann Resonances were absent. At the Timpson, TX field sites, loop antennae were positioned for directional reception, due to earthquake-induced, hydraulic fracturing activity currently conducted by the oil and gas industry. Two strong signals, one moderately strong signal, and approximately 6-8 weaker signals were detected in the immediate vicinity. The three stronger signals were mapped by a biangulation technique, followed by a triangulation technique for confirmation. This was the first antenna mapping technique ever performed for determining possible earthquake epicenters. Six and a half months later, Timpson experienced two M4 (M4.1 and M4.3) earthquakes on September 2, 2013 followed by a M2.4 earthquake three days later, all occurring at a depth of five kilometers. The Timpson earthquake activity now has a cyclical rate and a forecast was given to the proper authorities. As a result, the Southern California and Timpson, TX field results led to an improved design and construction of a third prototype antenna. With a loop antenna array, a viable communication system, and continuous monitoring, a full fracture cycle can be established and observed in real-time. In addition, field data could be reviewed quickly for assessment and lead to a much more improved earthquake forecasting capability. The EM precursors determined by this method appear to surpass all prior precursor claims, and the general public will finally receive long overdue forecasting.

Jones, Kenneth, II; Saxton, Patrick

2014-05-01

267

DISTÚRBIOS NUTRICIONAIS INDUZIDOS PELA ADUBAÇÃO DE FÓSFORO E FERRO EM PLANTAS JOVENS DE GRÁPIA (Apuleia leiocarpa) NUTRITIONAL DISTURBANCE INDUCED BY PHOSPHORUS AND IRON FERTILIZATION ON YOUNG PLANTS OF GRÁPIA (Apuleia leiocarpa)  

Microsoft Academic Search

A grápia (Apuleia leiocarpa Vog. Macbride) é uma espécie florestal nativa de grande interesse madeireiro, encontrando-se, atualmente, bastante dizimada. Em trabalhos anteriores, foi observado que as folhas novas de plantas jovens de grápia apresentaram sintomas visuais indicativos de deficiência de Fe na presença de doses crescentes de P. O presente trabalho teve como objetivo caracterizar os efeitos da interação da

Evandro Luiz Missio; Fernando Teixeira Nicoloso

2005-01-01

268

New Light Curves and Period Studies of V502 OPH W UMA System  

NASA Astrophysics Data System (ADS)

NEW LIGHT CURVES AND PERIOD STUDIES OF V502 OPH W UMa SYSTEM N.S.Awadalla National Research Institute of Astronomy and Geophysics( NRIAG ) Helwan Cairo EGYPT New BVR photoelectric observations of the W UMa eclipsing binary system V502 Oph have been presented and analyzed. The geometric and physical elements of the system have been obtained and compared to the previous results. The classification of the system concerning the sub-type of the W UMa binary has been studied as well as its evolution stage. Its period variation in a view of the light time effect has been examin

Awadalla, Nabil S.

269

21 CFR 520.1198 - Ivermectin and praziquantel paste.  

Code of Federal Regulations, 2010 CFR

...Habronema and Draschia spp. cutaneous third-stage larvae; Dermatitis caused by neck threadworm microfilariae, Onchocerca sp...Habronema and Draschia spp. cutaneous third-stage larvae; Dermatitis caused by neck threadworm microfilariae, Onchocerca...

2010-04-01

270

21 CFR 520.1198 - Ivermectin and praziquantel paste.  

Code of Federal Regulations, 2011 CFR

...Habronema and Draschia spp. cutaneous third-stage larvae; Dermatitis caused by neck threadworm microfilariae, Onchocerca sp...Habronema and Draschia spp. cutaneous third-stage larvae; Dermatitis caused by neck threadworm microfilariae, Onchocerca...

2011-04-01

271

21 CFR 520.1453 - Moxidectin and praziquantel gel.  

Code of Federal Regulations, 2010 CFR

...adults and L4 larval stages); hairworms: Trichostrongylus axei (adults); large-mouth stomach worms: Habronema muscae (adults); horse stomach bots: Gasterophilus intestinalis (2nd and 3rd instars) and G . nasalis (3rd...

2010-04-01

272

21 CFR 520.1453 - Moxidectin and praziquantel gel.  

Code of Federal Regulations, 2013 CFR

...adults and L4 larval stages); hairworms: Trichostrongylus axei (adults); large-mouth stomach worms: Habronema muscae (adults); horse stomach bots: Gasterophilus intestinalis (2nd and 3rd instars) and G . nasalis (3rd...

2013-04-01

273

21 CFR 520.1453 - Moxidectin and praziquantel gel.  

Code of Federal Regulations, 2012 CFR

...adults and L4 larval stages); hairworms: Trichostrongylus axei (adults); large-mouth stomach worms: Habronema muscae (adults); horse stomach bots: Gasterophilus intestinalis (2nd and 3rd instars) and G . nasalis (3rd...

2012-04-01

274

21 CFR 520.1198 - Ivermectin and praziquantel paste.  

Code of Federal Regulations, 2012 CFR

...adults)—Trichostrongylus axei ; Large-mouth Stomach Worms (adults)—Habronema muscae ; Bots (oral and gastric stages...adults)—Trichostrongylus axei ; Large-mouth Stomach Worms (adults)—Habronema muscae ; Bots (oral and gastric...

2012-04-01

275

21 CFR 520.1198 - Ivermectin and praziquantel paste.  

Code of Federal Regulations, 2014 CFR

...adults)—Trichostrongylus axei ; Large-mouth Stomach Worms (adults)—Habronema muscae ; Bots (oral and gastric stages...adults)—Trichostrongylus axei ; Large-mouth Stomach Worms (adults)—Habronema muscae ; Bots (oral and gastric...

2014-04-01

276

21 CFR 520.1453 - Moxidectin and praziquantel gel.  

Code of Federal Regulations, 2011 CFR

...pinworms: Oxyuris equi (adults and L4 larval stages); hairworms: Trichostrongylus axei (adults); large-mouth stomach worms: Habronema muscae (adults); horse stomach bots: Gasterophilus intestinalis (2nd and 3rd instars) and G ....

2011-04-01

277

21 CFR 520.1198 - Ivermectin and praziquantel paste.  

Code of Federal Regulations, 2013 CFR

...adults)—Trichostrongylus axei ; Large-mouth Stomach Worms (adults)—Habronema muscae ; Bots (oral and gastric stages...adults)—Trichostrongylus axei ; Large-mouth Stomach Worms (adults)—Habronema muscae ; Bots (oral and gastric...

2013-04-01

278

21 CFR 520.1453 - Moxidectin and praziquantel gel.  

Code of Federal Regulations, 2014 CFR

...pinworms: Oxyuris equi (adults and L4 larval stages); hairworms: Trichostrongylus axei (adults); large-mouth stomach worms: Habronema muscae (adults); horse stomach bots: Gasterophilus intestinalis (2nd and 3rd instars) and G....

2014-04-01

279

21 CFR 520.1445 - Milbemycin oxime and praziquantel.  

Code of Federal Regulations, 2013 CFR

...Ancylostoma caninum ), adult whipworm (Trichuris vulpis ), and adult tapeworm (Taenia pisiformis, Echinococcus multilocularis, and E. granulosus ) infections in dogs and puppies 2 pounds of body weight or greater and 6 weeks...

2013-04-01

280

21 CFR 520.1445 - Milbemycin oxime and praziquantel.  

Code of Federal Regulations, 2014 CFR

...Ancylostoma caninum ), adult whipworm (Trichuris vulpis ), and adult tapeworm (Taenia pisiformis, Echinococcus multilocularis, and E. granulosus ) infections in dogs and puppies 2 pounds of body weight or greater and 6 weeks...

2014-04-01

281

21 CFR 522.1870 - Praziquantel injectable solution.  

Code of Federal Regulations, 2011 CFR

...removal of canine cestodes Dipylidium caninum, Taenia pisiformis, and Echinococcus granulosus, and removal and control of canine cestode Echinococcus multilocularis . (iii) Limitations. For subcutaneous or intramuscular...

2011-04-01

282

21 CFR 522.1870 - Praziquantel injectable solution.  

Code of Federal Regulations, 2012 CFR

...removal of canine cestodes Dipylidium caninum, Taenia pisiformis, and Echinococcus granulosus, and removal and control of canine cestode Echinococcus multilocularis . (iii) Limitations. For subcutaneous or intramuscular...

2012-04-01

283

21 CFR 522.1870 - Praziquantel injectable solution.  

Code of Federal Regulations, 2010 CFR

...removal of canine cestodes Dipylidium caninum, Taenia pisiformis, and Echinococcus granulosus, and removal and control of canine cestode Echinococcus multilocularis . (iii) Limitations. For subcutaneous or intramuscular...

2010-04-01

284

21 CFR 524.775 - Emodepside and praziquantel.  

Code of Federal Regulations, 2011 CFR

...use . For the treatment and control of hookworm infections caused by Ancylostoma tubaeforme...stage larvae), roundworm infections caused by Toxocara cati ...stage larvae), and tapeworm infections caused by Dipylidium...

2011-04-01

285

A Dynamical Analysis of the 47 UMa Planetary System  

NASA Astrophysics Data System (ADS)

Thirteen years of Doppler velocity measurements have revealed the presence of two planets orbiting the star 47 Ursa Majoris on low eccentricity orbits. A 2-Keplerian fit to the radial velocity data suggests that the inner planet has a period Pb = 1089.0 +/- 2.9 d, and a nominal mass msin i = 2.54 MJup, while the outer planet has a period Pc = 2594 +/- 90 d, and a mass m sin i = 0.76 MJup. These mass and period ratios suggest a possible kinship to the Jupiter-Saturn pair in our own solar system. We explore the current dynamical state of this system with numerical integrations, and compare the results with analytic secular theory. We find that the planets in the system are likely participating in a secular resonance in which the arguments of pericenter librate around zero. The system may also currently be in a 7:3 mean-motion resonance. Using a self-consistent fitting procedure in conjunction with numerical integrations, we show that stability considerations restrict the mutual inclination between the two planets to 40 degrees or less, and that this result is relatively insensitive to the total mass of the two planets. We present hydrodynamical simulations which measure the torques exerted on the planets by a hypothesized external protoplanetary disk. We show that planetary migration in response to torques from the disk may have led to capture of the system into a 7:3 mean-motion resonance, although it is unclear how the eccentricities of the planets would have been damped after capture occured. We show that Earth-mass planets can survive for long periods in some regions of the habitable zone of the nominal co-planar system. A set of planetary accretion calculations, however, shows that it is unlikely that large terrestrial planets can form in the 47UMa habitable zone. This work was funded by the NASA Origins Program, and by a NASA Ames Director's Discretionary Fund Award.

Laughlin, G.; Chambers, J.; Fischer, D.

2001-12-01

286

College of Engineering EM Engineering Mechanics  

E-print Network

College of Engineering EM Engineering Mechanics KEY: # = new course * = course changed = course or concur: MA 213. EM 302 MECHANICS OF DEFORMABLE SOLIDS. (3 of Engineering or consent of chairperson, and EM 221; prereq or concur: MA 214. EM 313 DYNAMICS. (3

MacAdam, Keith

287

Structure and evolution of low-mass W UMa type systems -- II. with angular momentum loss  

E-print Network

In a preceding paper, using Eggleton's evolution code we have discussed the structure and evolution of low-mass W UMa type contact binaries without angular momentum loss (AML). The models exhibit cyclic behavior about a state of marginal contact on a thermal time-scale. Part of the time of each cycle is spent in contact and part in a semi-detached state. According to observations, W UMa systems suffer AML. We present the models of low-mass contact binaries with AML due to gravitational wave radiation (GR) or magnetic stellar wind (MSW) are presented. We find that gravitational radiation cannot prevent the cyclic evolution of W UMa systems, and the effect of gravitational radiation on the cyclic behavior of contact binary evolution is almost negligible. We also find that the most likely AML mechanism for W UMa systems is magnetic braking, and that magnetic braking effects can increase the period of the cyclic evolution, and shorten the fraction of the time spent in the poor thermal contact state. If W UMa stars do not undergo cyclic evolution, and their angular momentum loss is caused simultaneously by MSW of both components, we find that the value of the parameter, $\\lambda$, should be taken a larger value in comparison with those derived from observations of single stars. This indicates that the AML efficiency in W UMa systems may be lowered in comparison with non-contact stars because of the less mass contained in the convective envelopes of the components in W UMa systems. If W UMa systems lose their angular momentum at a constant rate. An angular momentum rate of $\\frac{{\\rm dln}J}{{\\rm d}t}\\approx 1.6\\times 10^{-9} {\\rm yr^{-1}}$ can prevent the cyclic behaviour of the model, and the model can keep in good contact with an essentially constant depth of contact.

L. Li; Z. Han; F. Zhang

2004-12-03

288

UMA WorldCat Sample Search 1 of 12| P a g e  

E-print Network

terms into the provided search box. Hit the enter key or click on the "search" button to run your queryUMA WorldCat Sample Search 1 of 12| P a g e A t t a c h m e n t 1 o f : T e a c h i n g E n g l i H u t t o n In this guide you will find: UMA WorldCat description Conducting a simple search Finding

Schweik, Charles M.

289

EPA LABORATORIES IMPLEMENT EMS PROGRAM  

EPA Science Inventory

This paper highlights the breadth and magnitude of carrying out an effective Environmental Management System (EMS) program at the U.S. EPA's research and development laboratories. Federal research laboratories have unique operating challenges compared to more centralized industr...

290

Spatial based Expectation Maximizing (EM)  

PubMed Central

Background Expectation maximizing (EM) is one of the common approaches for image segmentation. Methods an improvement of the EM algorithm is proposed and its effectiveness for MRI brain image segmentation is investigated. In order to improve EM performance, the proposed algorithms incorporates neighbourhood information into the clustering process. At first, average image is obtained as neighbourhood information and then it is incorporated in clustering process. Also, as an option, user-interaction is used to improve segmentation results. Simulated and real MR volumes are used to compare the efficiency of the proposed improvement with the existing neighbourhood based extension for EM and FCM. Results the findings show that the proposed algorithm produces higher similarity index. Conclusions experiments demonstrate the effectiveness of the proposed algorithm in compare to other existing algorithms on various noise levels. PMID:22029864

2011-01-01

291

B-EM: A Classifier Incorporating Bootstrap with EM Approach for Data Mining  

E-print Network

B-EM: A Classifier Incorporating Bootstrap with EM Approach for Data Mining Xintao Wu UNC that the more unlabeled examples are combined in learning, the more accurate the result. We then introduce B-EM

Wu, Xintao

292

The Intermediate Polar EI UMa: A Pre-Polar Cataclysmic Variable  

E-print Network

We present optical and X-ray time-series photometry of EI UMa that reveal modulation at 746 and 770 s, which we interpret as the white dwarf spin and spin-orbit sidebands. These detections, combined with previous X-ray studies, establish EI UMa as an intermediate polar. We estimate the mass accretion rate to be ~ 3.6 x 10^{17} g s^{-1}, which is close to, and likely greater than, the critical rate above which dwarf nova instabilities are suppressed. We also estimate the white dwarf to have a large magnetic moment mu > (3.4 +/- 0.2) x 10^{33} G cm^3. The high mass accretion rate and magnetic moment imply the existence of an accretion ring rather than a disk, and along with the relatively long orbital period, these suggest that EI UMa is a rare example of a pre-polar cataclysmic variable.

Tamara W. Reimer; William F. Welsh; Koji Mukai; F. A. Ringwald

2008-02-24

293

Detailed modelling and dynamic simulation of the deployment of the MBB unfurlable antenna UMA  

NASA Astrophysics Data System (ADS)

The purpose of this study was to investigate the dynamics during deployment of large antenna reflectors with the multi body simulation code FEDEM (Finite Element Dynamics in Elastic Mechanisms). The 'Unfurlable Mesh Antenna' (UMA) from MBB was taken as an example to encounter and solve real problems. The UMA has a ribmesh type reflector. The design concept consists of 8 double foldable ribs spreading the reflector out. A motor in the center drives a cable drum. The drum transmits the driving force to pulleys mounted on the ribs.

Bjorset, L. E.; Krabberod, J.; Sivertsen, O. I.

1993-09-01

294

REGIMENTO DO CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, REA DE CONCENTRAO EM  

E-print Network

REGIMENTO DO CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, ÁREA DE CONCENTRAÇÂO EM Propulsão (PCP) do Curso de Pós-graduação em Engenharia e Tecnologia Espaciais (ETE) objetiva formar e de Pós-Graduação, pelo Regimento do Curso de Pós- Graduação em Engenharia e Tecnologia Espaciais e

295

Burning the EMS candle. EMS shifts and worker fatigue.  

PubMed

Has coffee become your best friend? Do you sleep only in your dreams? Is your bed merely an illusion? If so, you are not alone; sleep deprivation is a fact of life for many EMS personnel. Though widely accepted, isn't it time that we question the effects of those long days and nights? PMID:10116022

McCallion, R; Fazackerley, J

1991-10-01

296

EM 306 Statics ABET EC2000 syllabus  

E-print Network

Edition Other Required Material: None Course Objectives: To be able to analyze systems of forcesEM 306 ­ Statics Page 1 ABET EC2000 syllabus EM 306 ­ Statics Fall and Spring 2009-10 Required Assignments: None Laboratory Projects: None #12;EM 306 ­ Statics Page 2 ABET EC2000 syllabus Contribution

Ben-Yakar, Adela

297

Project planning for EMS and SCADA systems  

Microsoft Academic Search

A typical supervisory control and data acquisition (SCADA) system or an energy management system (EMS) has an installed life of only 10 to 15 years. Because it can take five years or more to implement a new EMS or SCADA system, managing such projects is becoming a way of life for utilities. Project planning for EMS and SCADA systems is

Charles T. Lindeberg; Wayne R. Block

1993-01-01

298

Charge, from EM fields only  

E-print Network

An electron is a purely electromagnetic particle, a PEP. The biggest problem has been charge. Most simply put, charge is a source or sink of E fields. A way to assemble EM fields into a stable configuration that exhibits charge and other particle properties has been found, based in part on Weber's interpretation of the Faraday homopolar generator. A dipolar B field, spinning about its symmetry axis, creates a radial vxB electric field that falls off as 1/r^2. This paper suggests that pair production involves the rearrangement of the EM fields of each half a photon. The EM fields then oscillate at the Compton frequency between a dipolar B field and a toroidal E field. Electric and magnetic flux are quantized. An electron has angular momentum, and so the EM field assembly is spinning. The 1/r^2 E=vxB electric field, created by the spinning dipolar B field, is strongest at the waist and zero at the poles. Precession of the spin axis about a different axis and with the same rate as spin, produces charge. Otherwis...

Collins, R L

2006-01-01

299

WRF-EMS Aviation Products  

NSDL National Science Digital Library

This lesson illustrates how numerical guidance from the Weather Research and Forecasting Model - Environmental Modeling System (WRF-EMS) can be added to surface observations, satellite graphics, and conceptual models of important aviation phenomena, to produce TAFs. Specifically, the lesson describes how visibility, cloud ceilings, and the flight categories variables provide values for aviation forecasts in Africa.

2014-09-14

300

CURSO DE ESPECIALIZAO EM FISIOTERAPIA  

E-print Network

Bioquímica Fisiológica Medicina do Exercício em Pediatria Fisioterapia Respiratória Fisioterapia na Saúde ginecológica Nanotecnologia ­ Atualidades e Perspectivas Vinculadas à Tecnologia dos Materiais Biomecânica

Floeter, Sergio Ricardo

301

Kinematics of RS CVn and W UMa binaries in the Hipparcos catalogue  

Microsoft Academic Search

Space motions of RS CVn and W UMa binaries have been calculated using parallaxes and proper motions from Hipparcos catalogue and radial velocities from the literature. The authors have calculated the mean motions and velocity dispersions. They have excluded those binaries with relative parallax errors >=0.5. The comparison of the asymmetric drift, velocity ellipsoids and vertex deviation with those of

Zeki ASLAN; T. Özdemir; C. Yesilyaprak; A. Iskender

1999-01-01

302

Mobile Identity Management: An Enacted View George Roussos, Don Peterson, and Uma Patel  

E-print Network

, mobile identity management can play a central role to address usability and trust issues in mobile, brings issues related to mobility to the forefront. 2 #12;Mobile identity management is viewedMobile Identity Management: An Enacted View George Roussos, Don Peterson, and Uma Patel Abstract

Roussos, George

303

The Active Contact Binary Ty UMa Revisited: is It a Quadruple Star?  

NASA Astrophysics Data System (ADS)

TY UMa is an F-type eclipsing binary star. Four-color light curves and radial velocities of this system were presented and simultaneously analyzed using the W-D code. It is found that TY UMa is a W-subtype shallow contact binary system (f=13.4%) with a mass ratio of q = 2.523. In order to explain the asymmetric light curve of this binary, a dark spot on the less massive component was employed. Our newly determined 31 times of minimum light, including those collected from the literature, have been used to analyze orbital period changes of TY UMa. The complicated period variation could be sorted into a secular period increase at a rate of dp/dt\\=\\+5.18(+/- 0.21)× {{10}-7} days yr-1, a 51.7 yr periodic modulation (A3 = 0.0182 days), and a very small amplitude cyclic oscillation with a period of 10.0 yr (A4 = 0.0015 days). The long-term increase of the period can be explained by mass transfer from the less massive component to the more massive one. The Applegate mechanism may impossibly explain the two cyclic components in the period. The two cyclic variations are very likely caused by the light travel time effect of third and fourth components, suggesting that TY UMa is a quadruple system.

Li, K.; Hu, S.-M.; Guo, D.-F.; Jiang, Y.-G.; Gao, Y.-G.; Chen, X.; Odell, Andrew P.

2015-04-01

304

Uma perspectiva orientada ao território para o local e-government  

Microsoft Academic Search

1. INTRODUÇÃO O início do século XXI é marcado de forma indelével pelas Tecnologias de Informação e Comunicação. A vulgarização do computador e, mais recentemente da Internet, tornaram a sua influência nas mais variadas actividades humanas um factor quase constante. A crescente utilização do computador e da Internet leva a que uma quantidade cada vez maior da informação produzida esteja

Luis Manuel Borges Gouveia

2007-01-01

305

1998 Superoutburst of the Large-Amplitude SU UMa-Type Dwarf Nova WX Ceti  

E-print Network

We observed the 1998 November superoutburst of WX Cet, a dwarf nova originally proposed as a WZ Sge-like system. The observation established that WX Cet is an SU UMa-type dwarf nova with a mean superhump period of 0.05949(1) d, which is 2.1% longer than the reported orbital period. The lack of early superhumps at the earliest stage of the superoutburst, the rapid development of usual superhumps, and the possible rapid decay of late superhumps seem to support that WX Cet is a fairly normal large-amplitude SU UMa-type dwarf nova, rather than a WZ Sge-type dwarf nova with a number of peculiarities. However, a period increase of superhumps at a rate dot(P)/P = (+8.5+/-1.0) x 10^-5 was observed, which is one of the largest dot(P)/P ever observed in SU UMa-type dwarf novae. A linear decline of light, with a rate of 0.10 mag/d, was observed in the post-superoutburst stage. This may be an exemplification of the decay of the viscosity in the accretion disk after the termination of a superoutburst, mechanism of which is proposed to explain a variety of post-superoutburst phenomena in some SU UMa-type dwarf novae.

Taichi Kato; Katsura Matsumoto; Daisaku Nogami; Koichi Morikawa; Seiichiro Kiyota

2001-10-10

306

ADS -Accelerator Driven System -Uma tecnologia do futuro para a produo de energia nuclear  

E-print Network

ADS - Accelerator Driven System - Uma tecnologia do futuro para a produção de energia nuclear 1980, quando as restrições ligadas principalmente a possíveis catástrofes relacionadas à tecnologia nessa tecnologia, que poderá ser de grande importância num futuro não muito distante. 2 #12;

Ribas, Roberto Vicençotto

307

Correlation of the NBME Advanced Clinical Examination in EM and the National EM M4 exams  

PubMed Central

Introduction Since 2011 two online, validated exams for fourth-year emergency medicine (EM) students have been available (National EM M4 Exams). In 2013 the National Board of Medical Examiners offered the Advanced Clinical Examination in Emergency Medicine (EM-ACE). All of these exams are now in widespread use; however, there are no data on how they correlate. This study evaluated the correlation between the EM-ACE exam and the National EM M4 Exams. Methods From May 2013 to April 2014 the EM-ACE and one version of the EM M4 exam were administered sequentially to fourth-year EM students at five U.S. medical schools. Data collected included institution, gross and scaled scores and version of the EM M4 exam. We performed Pearson’s correlation and random effects linear regression. Results 303 students took the EM-ACE and versions 1 (V1) or 2 (V2) of the EM M4 exams (279 and 24, respectively). The mean percent correct for the exams were as follows: EM-ACE 74.8 (SD-8.83), V1 83.0 (SD-6.41), V2 78.5 (SD-7.70). Pearson’s correlation coefficient for the V1/EM-ACE was 0.51 (0.42 scaled) and for the V2/EM-ACE was 0.59 (0.41 scaled). The coefficient of determination for V1/EM-ACE was 0.72 and for V2/EM-ACE = 0.71 (0.86 and 0.49 for scaled scores). The R-squared values were 0.25 and 0.30 (0.18 and 0.13, scaled), respectively. There was significant cluster effect by institution. Conclusion There was moderate positive correlation of student scores on the EM-ACE exam and the National EM M4 Exams. PMID:25671023

Hiller, Katherine; Miller, Emily S.; Lawson, Luan; Wald, David; Beeson, Michael; Heitz, Corey; Morrissey, Thomas; House, Joseph; Poznanski, Stacey

2015-01-01

308

Diabetes e transtornos alimentares: Diabetes e transtornos alimentares: Diabetes e transtornos alimentares: Diabetes e transtornos alimentares: Diabetes e transtornos alimentares: uma associação de alto risco uma associação de alto risco uma associação de alto risco uma associação de alto risco uma associação de alto risco Diabetes and eating disorders: a high Diabetes and eating disorders: a high Diabetes and eating disorders: a high Diabetes and eating disorders: a high Diabetes and eating disorders: a high  

Microsoft Academic Search

O diabetes mellitus (DM) é uma doença crônica que cursa com várias complicações clínicas e está entre as maiores causas de morbidade e mortalidade no Brasil. A presença de comorbidades psiquiátricas, principalmente depressão e transtornos alimentares (TA), no paciente diabético, pode interferir no controle metabólico e aumen- tar as complicações da doença. Entre os vários fatores na associação entre o

Alexandre Pinto de Azevedo; Marcelo Papelbaum; Fernanda D'Elia

309

Absolute and geometric parameters of the W UMa type contact binary V546 And  

NASA Astrophysics Data System (ADS)

We present the results of our investigation on the geometrical and physical parameters of the W UMa-type binary V546 And from analyzed CCD (BVRI) light curves and radial velocity data. The photometric data were obtained in 2010 and 2011 at Ankara University Observatory (AUO) and the spectroscopic observations were made in 2010 at TUBITAK National Observatory (TUG). Light and radial velocity observations were analyzed simultaneously by using the Wilson-Devinney (2013 revision) code to obtain absolute and geometrical parameters. The system was determined to be a W-type W UMa system. Combining our photometric solution with the spectroscopic data we derived masses and radii of the eclipsing system to be M1 = 0.275M?,M2 = 1.083M?,R1 = 0.661R? and R2 = 1.229R? . We finally discuss the evolutionary status of the system.

Gürol, Birol; Bradstreet, David H.; Okan, Abdullah

2015-04-01

310

Infrasonic harmonic tremor and degassing bursts from Halema'uma'u Crater, Kilauea Volcano, Hawaii  

Microsoft Academic Search

The formation, evolution, collapse, and subsequent resurrection of a vent within Halema'uma'u Crater, Kilauea Volcano, produced energetic and varied degassing signals recorded by a nearby infrasound array between 2008 and early 2009. After 25 years of quiescence, a vent-clearing explosive burst on 19 March 2008 produced a clear, complex acoustic signal. Near-continuous harmonic infrasonic tremor followed this burst until 4

David Fee; Milton Garcés; Matt Patrick; Bernard Chouet; Phil Dawson; Don Swanson

2010-01-01

311

Uma equipa de investigadores portugueses pretende fazer o mapeamento 3D das Ilhas  

E-print Network

da Península Antártica. Na bagagem, leva um drone por Hugo Séneca m 50 anos, a temperatura média da cartografia de Marte, uma campanha de crowdfunding e um drone que promete acelerar a capacidade de mapeamento de um drone EBEE, da fabricante SenseFly, para o mapeamento 3D da península Antár- Os investigadores

Instituto de Sistemas e Robotica

312

The habitable zone of Earth-like planets around 47 UMa  

Microsoft Academic Search

The system of 47 UMa consists of two Jupiter-size planets beyond the outer edge of the stellar habitable zone, and thus resembles our own Solar System rather closely. The habitability of this system for Earth-like planets is investigated following a concept, which assumes the long-term possibility of photosynthetic biomass production under geodynamic conditions. In particular, the stellar luminosity and the

Werner von Bloh; Manfred Cuntz; Christine Bounama; Siegfried Franck

2002-01-01

313

Mestrado e Doutorado em Filosofia edital 2014  

E-print Network

Mestrado e Doutorado em Filosofia PUC-Rio edital 2014 O Departamento de Filosofia da Pontifícia Pós-graduação em Filosofia, nos níveis de mestrado e doutorado. Para a seleção de 2014, são oferecidas Filosofia; o candidato ao doutorado deverá ser mestre em Filosofia ou ter titulação equivalente. 1.3. Os

314

A cool stellar companion to the ? Scuti variable star GW UMa  

NASA Astrophysics Data System (ADS)

GW UMa is a new high-amplitude ? Scuti variable star with a period of 0d.20319367. By using a few new determined times of light maximum together with those collected from the literature, the changes in Observed-Calculated (O-C) diagram were analyzed. It is discovered that the O-C curve of GW UMa shows a cyclic variation with a period of 13.2 years and a semi-amplitude of 0.0023 days. The periodic variation was analyzed for the light-travel time effect that may be due to the presence of a stellar companion. The mass of the stellar companion is determined to be M2 sin i=0.11(±0.01)M? when a mass of 1.76 M? for GW UMa is adopted. The two component stars in the binary system are orbiting each other at an orbital separation about 6.5(±0.8) AU. For orbital inclinations i?22.6°, the mass of the companion star would be M2<0.3M? and it is a fully convective star. The detection suggests that hidden stellar companions to bright stars may be not unusual.

Wang, S.-M.; Qian, S.-B.; Li, L.-J.; Zhu, L.-Y.; Zhao, E.-G.; Zhou, X.

2015-01-01

315

The absolute parameters of two W UMa type binaries in Ursa Majoris  

NASA Astrophysics Data System (ADS)

We present the results of simultaneous Wilson-Devinney analyses of light and radial velocity curves of two contact binaries in the constellation Ursa Majoris. We found that HH UMa is an A-subtype W UMa binary, which conflicts with the classification of Han et al. (2014) as a W-subtype. Seasonal variations observed in the light curves of the system are well explained with two cool stellar spots in our solution as opposed to the hot-spot based solution by Han et al. (2014), the presence of which would not cause such rapid period variations. The evolutionary status of the system is in agreement with the findings of our study. We modeled II UMa, another A-subtype overcontact binary, without surface spots and found that its both components have rather low surface gravities indicating an advanced state of evolution pointing to evolved subgiants. The high contact degree (f=74%) supports this viewpoint. Our analysis shows that there is a significant third light contribution, contradicting some of the previous analyses, which lack the detection of the secondary minima as total eclipses because they were not as evident as they are in our light curves.

Y?lmaz, M.; Ba?türk, Ö.; Özavc?, ?.; ?enavc?, H. V.; Selam, S. O.

2015-01-01

316

UBVRI Analysis of the Totally Eclipsing Extreme Mass Ratio W UMa Binary, GSC 3208 1986  

NASA Astrophysics Data System (ADS)

GSC 3208 1986 is an NSVS and TYCHO binary, first observed from 1999 to 2000. It is a W UMa binary with a period of 0.405 days. The present observations were taken in 2012 September and are of high precision, averaging a standard deviation of better than 5 mmag. The amplitude of the light curve is very nearly 0.5 mag yet it undergoes total eclipses. Dominion Astrophysical Observatory spectra give an F3V type (T? 6900 K) for the system, the earliest of the extreme mass ratio W UMa binaries. The linear period determination of 0.4045672 days was calculated with the two sets of epochs available. An early NSVS light curve reveals that the period has been smoothly decreasing over its past 12,000 orbits. The binary may be undergoing sinusoidal oscillations due to the presence of a third body, possibly with a period of 23+/- 3 years. The high inclination of 85° results in a long duration secondary total eclipse, lasting some 49.5 minutes. Findings indicate that GSC 3208 1986 is an immaculate extreme mass ratio, q(m2/m1) = 0.24, A-type W UMa binary.

Samec, R. G.; Kring, J. D.; Robb, Russell; Van Hamme, W.; Faulkner, D. R.

2015-03-01

317

Ultraviolet spectroscopic study of EU UMa and ST LMi from HST and IUE observations  

NASA Astrophysics Data System (ADS)

We present the first orbit-resolved ultraviolet spectroscopic observations of the two polar systems EU UMa and ST LMi obtained with the Hubble Space Telescope Faint Object Spectrograph (HST FOS) and International Ultraviolet Explorer (IUE) during their intermediate- and low-luminosity states in the period between 1982 and 2003. Different line profiles of the two systems showing variations of line fluxes at different orbital phases are presented. This paper focuses on the C IV emission line at 1550 Å produced in the accretion stream, presenting calculations of spectral line fluxes, ultraviolet luminosities, and accretion rates for the two systems. Our analysis of the spectroscopic data reveals changes with orbital phase of the emission line profiles that correspond to the light curve variations of both EU UMa and ST LMi in the optical and infrared bands. The variations of line fluxes are attributed to variations of both density and temperature as a result of a changing rate of mass transfer from the secondary star to the white dwarf. The ultraviolet luminosity and accretion rate of EU UMa are smaller than the ultraviolet luminosity and accretion rate of ST LMi.

Sanad, M. R.; Bobrowsky, M.

2015-04-01

318

Universidade de Braslia Programa de Ps-Graduao em Cincias e Tecnologias em Sade -PGCTS/FCE  

E-print Network

Universidade de Brasília Programa de Pós-Graduação em Ciências e Tecnologias em Saúde - PGCTS/FCE Edital n. 01/2013 1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIAS E TECNOLOGIAS EM SAÚDE EDITAL Nº 01/2013 SELEÇÃO DE CANDIDATOS ÀS VAGAS DO PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIAS E TECNOLOGIAS

Maier, Rudolf Richard

319

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM COMBUSTÃO E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM COMBUSTÃO E PROPULSÃO Adaptação Obrigatórias para o mestrado PCP

320

Modelo de atmosfera solar ajustado às observações do raio solar em 17GHz  

NASA Astrophysics Data System (ADS)

O estudo das variações do raio solar durante o ciclo de atividades do Sol e das diferenças em relação à sua distribuição angular nos fornece informações importantes sobre as mudanças na estrutura da atmosfera solar. Neste trabalho foram analisados mais de 3600 mapas do Sol em 17 GHz obtidos pelo Rádio Heliógrafo de Nobeyama (NoRH), durante 1 ciclo de atividade solar (1992-2003). O raio solar foi definido no ponto onde a temperatura de brilho do mapa era equivalente à metade da temperatura do Sol calmo (temperatura mais comum no mapa).Em relação à sua variação ao longo do ciclo solar, o estudo foi dividido em duas partes: a) ajuste de uma circunferência a pontos distribuídos ao redor do Sol todo. Este estudo mostrou uma variação correlacionada com o ciclo de atividade do Sol. b) ajuste da circunferência a pontos situados somente nas regiões polares. Neste caso os resultados mostraram que o raio polar sofre pouca variação durante o ciclo, com tendência à anticorrelação com este. Além disto, a média do raio polar, durante o período analisado, foi 1" menor que o raio medido no Sol todo. Para estudar a distribuição angular do raio solar, comparamos a média da distribuição de 10 mapas no período de mínima atividade solar com a média de 10 mapas no período de máximo, este estudo mostrou um grande aumento do raio na região equatorial no período de máxima atividade solar. As medidas do raio foram usadas como um dos parâmetros para a criação de um modelo atmosférico (além da temperatura de brilho do Sol e do abrilhantamento do limbo observado), onde mostramos que um modelo atmosférico com a região de transição situada a 3500 km fornece um raio 5" menor que as medidas observacionais. Esta incompatibilidade do modelo com os dados observacionais foi contornada com a inclusão de espículas, estas fazem com que o raio solar aumente proporcionalmente à altura que estas atingem na atmosfera solar. A anticorrelação do raio polar com ciclo de atividade pode ser interpretada como reflexo do aumento de abrilhantamento de limbo nos pólos, visto que este está anticorrelacionado com o ciclo solar. Porém, a presença de espículas, não é capaz de explicar os valores muito altos do raio solar medidos na região equatorial, que acreditamos ser devido às mudanças intrínsecas na estrutura local da atmosfera solar.

Selhorst, C. L.; Silva, A. V. R.; Costa, J. E. R.

2003-08-01

321

Tendências De Teses e Dissertações Sobre Educação em Astronomia No Brasil  

NASA Astrophysics Data System (ADS)

Apresentam-se os resultados de uma pesquisa do tipo estado da arte sobre teses e dissertações defendidas no Brasil e relativas ao ensino de Astronomia, com objetivo de identificar essa produção e conhecer as principais tendências da pesquisa nesse campo. Foram localizadas 13 dissertações de mestrado e 3 teses de doutorado, as quais foram estudadas em função dos seguintes aspectos: isntituição, ano de defesa, nível escolar abrangido no estudo, foco temático do estudo e gênero de trabalho acadêmico. Pretende-se assim colaborar com a divulgação ampla da produção acadêmica na área. Ao mesmo tempo o estudo possibilita, a partir de investigações decorrentes, apontar as contribuições dessa produção para o ensino e sinalizar com necessidades a serem supridas por futuras pesquisas.

Bretones, Paulo Sergio; Megid Neto, Jorge

2005-07-01

322

Photometric study of new southern SU UMa-type dwarf novae - II: Authentication of BF Ara as a Normal SU UMa-type Dwarf Nova with the Shortest Supercycle  

E-print Network

We photometrically observed the 2002 August long outburst of BF Ara. The observation for the first time unambiguously detected superhumps (average period 0.08797(1) d), qualifying BF Ara as a genuine SU UMa-type dwarf nova. An analysis of the long-term visual light curve yielded a mean supercycle length of 84.3(3) d. The characteristics of outbursts and superhumps more resemble those of usual SU UMa-type dwarf novae rather than those of ER UMa stars. BF Ara is thus confirmed to be the usual SU UMa-type dwarf nova with the shortest known supercycle length. There still remains an unfilled gap of distributions between ER UMa stars and usual SU UMa-type dwarf novae. We detected a zero period change of the superhumps, which is quite unexpected from our previous knowledge. This discovery implies that a previous interpretation requiring a low M-dot would be no longer valid, or that a different mechanism is responsible for BF Ara. We propose that the reduced (prograde) apsidal motion of the eccentric disk by pressure forces may be responsible for the unusual period change in BF Ara.

T. Kato; G. Bolt; P. Nelson; B. Monard; R. Stubbings; A. Pearce; H. Yamaoka; T. Richards

2003-01-29

323

ON THE ROLE OF ORTHOGONALITY IN THE GMRES METHOD ZN ' IK, Z. STRAKO S, M. T UMA ? ??  

E-print Network

ON THE ROLE OF ORTHOGONALITY IN THE GMRES METHOD M. ROZLO Ÿ ZN ' IK, Z. STRAKO Ÿ S, M. T š UMA and Computer Science, Emory University, Atlanta, USA ?? This work was supported by the GA AS CR under grant

Tùma, Miroslav

324

EM international activities. February 1997 highlights  

SciTech Connect

EM International Highlights is a brief summary of on-going international projects within the Department of Energy`s Office of Environmental Management (EM). This document contains sections on: Global Issues, activities in Western Europe, activities in central and Eastern Europe, activities in Russia, activities in Asia and the Pacific Rim, activities in South America, activities in North America, and International Organizations.

NONE

1997-02-01

325

School Budget Hold'em Facilitator's Guide  

ERIC Educational Resources Information Center

"School Budget Hold'em" is a game designed to help school districts rethink their budgeting process. It evolved out of Education Resource Strategies' (ERS) experience working with large urban districts around the country. "School Budget Hold'em" offers a completely new approach--one that can turn the budgeting process into a long-term visioning…

Education Resource Strategies, 2012

2012-01-01

326

Analysis of EM Channel of Producing Well  

Microsoft Academic Search

Measurements while drilling (MWD) is a new technology by which we can observe the measurement values of the drilling parameters in the way of real-time. Use the results of searching the electromagnetic (EM) transmission channel for MWD for reference, an EM transmission model for the wireless transmission is set up. In addition, the model parameters are calculated by using the

Jintao Yu; Mingli Ding; Tingwei Liang

2008-01-01

327

The habitable zone of Earth-mass planets around 47 UMa: results for land and water worlds  

Microsoft Academic Search

In a previous paper, we showed that Earth-type habitable planets around 47 UMa are in principle possible if a distinct set of conditions is warranted. These conditions include that the Earth-type planets have successfully formed and are orbitally stable and, in addition, that the 47 UMa star-planet system is relatively young ([less, similar]6 Gyr). We now extend this study by

S. Franck; M. Cuntz; W. von Bloh; C. Bounama

2003-01-01

328

Em que medida devem ser privados, em que medida devem ser pblicos o conhecimento e a informao?  

E-print Network

Em que medida devem ser privados, em que medida devem ser públicos o conhecimento e a informação? 1 Transparências com licença Creative Commons Em que medida devem ser privados, em que medida devem ser públicos o as alternativas? codexKonstanz #12;Em que medida devem ser privados, em que medida devem ser públicos o

Kuhlen, Rainer

329

Um novo paradigma na medicina DESENVOLVEU UMA METODOLOGIA DISRUPTIVA BASEADA NA INTEGRAO DE AVANADAS TECNOLOGIAS  

E-print Network

INTEGRAÇÃO DE AVANÇADAS TECNOLOGIAS DE GENÉTICA E MÉTODOS COMPUTACIONAIS SOFISTICADOS. OBJECTIVO? AJUDAR OS MÉDICOS A MELHORAR DIAGNÓSTICOS NA MEDICINA DO CORAÇÃO. #12;Depois do aperfeiçoamento das tecnologias pa cardíacas. A tecnologia permite analisar um elevado núme- ro de alterações genéticas em simultâneo, de for

Instituto de Sistemas e Robotica

330

Garcinia cambogia - uma espécie vegetal como recurso terapêutico contra a obesidade?6  

Microsoft Academic Search

Resumo Atualmente, a obesidade é um problema de saúde pública mundial, tanto nos países desenvolvidos como nos em desenvolvimento, apresentando elevação de sua prevalência. A transição nutricional é um processo de modificações seqüenciais no padrão de nutrição e consumo que acompanha mudanças econômicas, sociais e demográficas, e mudanças do perfil de saúde das populações. Este trabalho objetiva abordar a comprovação

Ana C S Santos; Michelle S Alvarez; Priscila B Brandão; Ary G Silva

331

Physical parameters determination of the RR Lyrae stars RU Psc, SS Psc and TU UMa  

NASA Astrophysics Data System (ADS)

Empirical determination of the physical characteristics of RR Lyrae stars is important because their accurate modeling requires knowledge of precise metallicity, effective temperature, surface gravity, luminosity and period of pulsation. Some of these parameters can be estimated from Fourier light curve decomposition (Simon & Clement 1993). Furthermore, uvby? photoelectric photometry can also be used to estimate some physical parameters from the comparison with synthetic colours (Lester et al. 1986). Stromgren uvby? photometry of the RR Lyrae stars RU Piscium (RRc), SS Piscium (RRc) and TU UMa (RRab) has been acquired. We report the values of Teff , MV , [Fe/H] and log g.

Pena, J. H.; Chow, M.; Pena, R.; Arellano Ferro, A.; Alvarez, M.; Torres, E.

2008-12-01

332

Absolute-Magnitude Calibration for W~UMa-type Systems. II. Influence of Metallicity  

E-print Network

A modification to the absolute magnitude calibration for W~UMa-type systems, taking into account differences in metal abundances, is derived on the basis of contact binary systems recently discovered in metal-poor clusters. A preliminary estimate of the magnitude of the metallicity-dependent term for the $(B-V)$-based calibration is $\\Delta M_V = -(0.3 \\pm 0.1) \\times [Fe/H]$. The calibration based on the $(V-I_C)$ color is expected to be less sensitive with the correction term $\\approx -(0.12\\pm 0.05) \\times [Fe/H]$.

Slavek Rucinski

1995-03-01

333

Infrared photometry of the RS CVn short-period systems - XY UMa and WY Cnc  

SciTech Connect

Infrared J and K light curves of two RS CVn short-period systems, XY UMa and WY Cnc, are presented. Both systems show similar variability in the infrared to that observed in the visual. From the colors an infrared excess is inferred for the primary component of both systems. A new determination of their geometrical elements is presented and the resulting parameters are compared to those previously obtained from visible photometry. The light curves show peculiarities that may indicate the presence of gas streams in the systems. 27 refs.

Arevalo, M.J.; Lazaro, C. (Instituto de Astrofisica de Canarias, La Laguna (Spain))

1990-03-01

334

Late superhumps and the stream-disc impact in IY UMa  

E-print Network

We use the hot spot eclipse times of the newly discovered deeply-eclipsing dwarf nova IY UMa to trace out the shape of its disc during the late superhump era. We find an eccentric disc. We show that the brightness of the stream-disc impact region varies as expected with |deltaV|^2, where deltaV is the differential velocity of the stream with respect to the velocity of the disc at the impact point. We conclude that the hot spot is the source of late superhump light.

Daniel J. Rolfe; Carole A. Haswell; Joseph Patterson

2000-11-15

335

Os sintomas vagos e difusos em biomedicina: uma revisão da literatura Vague and diffuse symptoms in biomedicine: a review of the literature  

Microsoft Academic Search

The purpose of this study is to chart academic output on vague and diffuse symptoms in biomedicine. As methodological tool, we con- ducted a bibliographic study through the Inter- net ranging from 1990 to 2005. Forty papers were selected and five major theme areas were estab- lished for the survey: the nomenclatures assigned to vague and diffuse symptoms; their definitions;

Carla Ribeiro Guedes; Maria Inês Nogueira; Kenneth Rochel de Camargo

336

ABORDAGEM DA SEXUALIDADE HUMANA EM LIVRO DIDÁTICO DE CIÊNCIAS - DESVELANDO OS BASTIDORES DE UMA PROPOSTA. APPROACH OF HUMAN SEXUALITY IN SCIENCE TEXBOOKS - REVEALING THE BACKSTAGE OF A PROPOSAL  

Microsoft Academic Search

In this article, teachers with a long classroom militancy, describe the process and challenges to become authors of textbooks. After brief reflections on issues related to textbooks and curriculum, the authors show the background of the production process: studies, research, meetings and even internal conflicts and external pressures. They choose to highlight their approach in human sexuality and its interfaces

Margarida Carvalho de Santana; Mônica de Cássia; Vieira Waldhelm

337

Em busca de uma assistência adequada à saúde do idoso: revisão da literatura e aplicação de um instrumento de detecção precoce e de previsibilidade de agravos  

Microsoft Academic Search

The increase in the elderly population demands changes in health care models by pol- icymakers to deal with the substantial cost increase This article addresses patient access flow and the definition of priorities in an outpatient unit. A short questionnaire (8 questions) was used to assess enrollment and ranking of the elderly at risk of repeated hospital admissions, con- sidered

Renato Veras

2003-01-01

338

Ao judicial 930007202-1 j paga em fevereiro 10/02/2006 -2006 comea com mais uma boa notcia para um grupo de  

E-print Network

DAMIAN PREVE ALTIVA ALTINA MINICH ANA LOPES RACHADEL ANA LUCIA PEREIRA DO AMARAL ANA MARIA VELOSO VIEIRA CARLUCIA ROCHA CARMEN LUCIA BLASI VILLARI CATARINA MARTENDAL CELIA RIBEIRO CELLY DULCEMAR MELO CELSO RAMOS GALLIANI LOFY CORINA MARTINS ESPINDOLA #12;DARCI ESPINDOLA DAVID FRANCISCO TURNES DEISE LUCY OLIVEIRA

Floeter, Sergio Ricardo

339

POTENCIALIDADES E LIMITES DE UMA PROPOSTA ALTERNATIVA DE ESTUDO DO ESPORTE NA FORMAÇÃO SUPERIOR EM EDUCAÇÃO FÍSICA: OLHARES DE PROFESSORES E ACADÊMICOS  

Microsoft Academic Search

In the year of 2001 the graduation course in Physical Education of the Unijuí, like part of a new curricular project, implemented an alternative form of studying the sport, when compared with the traditional form of treating the topic in the superior education in physical education. In this text the teachers' opinions and students are introduced in relation to the

Fernando Jaime González

340

Project X RFQ EM Design  

SciTech Connect

Project X is a proposed multi-MW proton facility at Fermi National Accelerator Laboratory (FNAL). The Project X front-end would consist of an H- ion source, a low-energy beam transport (LEBT), a CW 162.5 MHz radio-frequency quadrupole (RFQ) accelerator, and a medium-energy beam transport (MEBT). Lawrence Berkeley National Laboratory (LBNL) and FNAL collaboration is currently developing the designs for various components in the Project X front end. This paper reports the detailed EM design of the CW 162.5 MHz RFQ that provides bunching of the 1-10 mA H- beam with acceleration from 30 keV to 2.1 MeV.

Romanov, Gennady; /Fermilab; Hoff, Matthew; Li, Derun; Staples, John; Virostek, Steve; /LBNL

2012-05-09

341

EM International, July 1994, Volume 2  

SciTech Connect

The Office of Environmental Management (EM) at the Department of Energy (DOE) is seeking out and leveraging foreign technology, data, and resources in keeping with EM`s mandate to protect public health and the environment through the safe and cost-effective remediation of the Department`s nuclear weapons sites. EM works closely with foreign governments, industry, and universities to obtain innovative environmental technologies, scientific and engineering expertise, and operations experience that will support EM`s objectives. Where appropriate, these international resources are used to manage the more urgent risks at our sites, secure a safe workplace, help build consensus on critical issues, and strengthen our technology development program. Through international agreements EM engages in cooperative exchange of information, technology, and individuals. Currently, we are managing agreements with a dozen countries in Europe, Latin America, and Asia. These agreements focus on environmental restoration, waste management, transportation of radioactive wastes, and decontamination and decommissioning. This publication contains the following articles: in situ remediation integrated program; in-situ characterization and inspection of tanks; multimedia environmental pollutant assessment system (MEPAS); LLNL wet oxidation -- AEA technology. Besides these articles, this publication covers: EU activities with Russia; technology transfer activities; and international organization activities.

Not Available

1994-10-01

342

Models of the formation of the planets in the 47 UMa system  

NASA Astrophysics Data System (ADS)

% Formation of planets in the 47 UMa system is followed in an evolving protoplanetary disk composed of gas and solids. The evolution of the disk is calculated from an early stage, when all solids, assumed to be high-temperature silicates, are in the dust form, to the stage when most solids are locked in planetesimals. The simulation of planetary evolution starts with a solid embryo of ~ 1 Earth mass, and proceeds according to the core accretion - gas capture model. Orbital parameters are kept constant, and it is assumed that the environment of each planet is not perturbed by the second planet. It is found that conditions suitable for both planets to form within several Myr are easily created, and maintained throughout the formation time, in disks with alpha ~0.01. In such disks, a planet of 2.6 Jupiter masses (the minimum for the inner planet of the 47 UMa system) may be formed at 2.1 AU from the star in ~ 3 Myr, while a planet of 0.89 Jupiter masses (the minimum for the outer planet) may be formed at 3.95 AU from the star in about the same time. The formation of planets is possible as a result of a significant enhancement of the surface density of solids between 1.0 and 4.0 AU, which results from the evolution of a disk with an initially uniform gas-to-dust ratio of 167 and an initial radius of 40 AU.

Kornet, K.; Bodenheimer, P.; Ró?yczka, M.

2002-12-01

343

PhenUMA: a tool for integrating the biomedical relationships among genes and diseases.  

PubMed

BackgroundSeveral types of genetic interactions in humans can be directly or indirectly associated with the causal effects of mutations. These interactions are usually based on their co-associations to biological processes, coexistence in cellular locations, coexpression in cell lines, physical interactions and so on. In addition, pathological processes can present similar phenotypes that have mutations either in the same genomic location or in different genomic regions. Therefore, integrative resources for all of these complex interactions can help us prioritize the relationships between genes and diseases that are most deserving to be studied by researchers and physicians.ResultsPhenUMA is a web application that displays biological networks using information from biomedical and biomolecular data repositories. One of its most innovative features is to combine the benefits of semantic similarity methods with the information taken from databases of genetic diseases and biological interactions. More specifically, this tool is useful in studying novel pathological relationships between functionally related genes, merging diseases into clusters that share specific phenotypes or finding diseases related to reported phenotypes.ConclusionsThis framework builds, analyzes and visualizes networks based on both functional and phenotypic relationships. The integration of this information helps in the discovery of alternative pathological roles of genes, biological functions and diseases. PhenUMA represents an advancement toward the use of new technologies for genomics and personalized medicine. PMID:25420641

Rodríguez-López, Rocío; Reyes-Palomares, Armando; Sánchez-Jiménez, Francisca; Medina, Miguel

2014-11-25

344

NY Serpentis: SU UMa-type nova in the period gap with diversity of normal outbursts  

NASA Astrophysics Data System (ADS)

We present a photometric study of NY Ser, an in-the-gap SU UMa-type nova, in 2002 and 2013. We determined the duration of its superoutburst and the mean period of its superhump are 18 d and 0.10458 d, respectively. We detected in 2013 that NY Ser showed two distinct states separated by a superoutburst. A state of rather infrequent normal outbursts lasted at least 44 d before the superoutburst, and a state of frequent outbursts started immediately after the superoutburst and lasted at least 34 d. Unlike a typical SU UMa star with a bimodal distribution of outburst duration, NY Ser displayed a diversity of normal outbursts. In the state of infrequent outbursts, we detected a wide ˜ 12 d outburst accompanied by 0.098 d orbital modulation but without superhumps ever established in NY Ser. We classified this as a "wide normal outburst." The orbital period was dominant both in quiescence and during normal outbursts in this state. In the state of the most frequent normal outbursts, the 0.10465 d positive superhump period was dominant and coexisted with the orbital modulation. In 2002 we detected the normal outburst of "intermediate" 5-6 d duration that was also accompanied by orbital modulations.

Pavlenko, Elena P.; Kato, Taichi; Antonyuk, Oksana I.; Ohshima, Tomohito; Hambsch, Franz-Josef; Antonyuk, Kirill A.; Sosnovskij, Aleksei A.; Baklanov, Alex V.; Shugarov, Sergey Yu.; Pit, Nikolaj V.; Nakata, Chikako; Masi, Gianluca; Nakajima, Kazuhiro; Maehara, Hiroyuki; Dubovsky, Pavol A.; Kudzej, Igor; Andreev, Maksim V.; Kuznyetsova, Yuliana G.; Vasiliskov, Kirill A.

2014-12-01

345

High-speed energy-resolved STJ photometry of the eclipsing dwarf nova IY UMa  

E-print Network

We present high time-resolution photometry of the dwarf nova IY UMa using the S-Cam2 super-conducting tunnel junction device attached to the 4.2m William Herschel Telescope on La Palma. Exploiting the well-defined white dwarf and hot spot eclipse features, we derive an updated orbital ephemeris for IY UMa and an orbital period of 0.07390897(5) days. A white dwarf ingress/egress duration of 31 +/- 2s along with the contact phases of the bright spot gives M_1=0.79 +/- 0.04 M_sun and M_2=0.10 +/- 0.01 Msun, corresponding to a mass ratio of q=0.125 +/- 0.008. The white dwarf eclipse width of 0.0637 then implies i=86.0 +/- 1 degrees. A curious rise with a duration of 30 +/- 2s is observed in the orbital lightcurves during all three observed eclipses. It occurs between the end of white dwarf ingress and hot spot ingress and is blue in colour. We suggest that the source of this light lies in the buried part of the gas stream, resulting in a compact, hot impact cavity.

D. Steeghs; M. Perryman; A. Reynolds; J. H. J. de Bruijne; T. Marsh; V. S. Dhillon; A. Peacock

2002-10-30

346

A Proposed Activity for a Meaningful Learning about the Moon Phases. (Breton Title: Uma Proposta de Atividade Para a Aprendizagem Significativa sobre as Fases da Lua.) Una Actividad Propuesta Para EL Aprendizaje Significativo Acerca de Las Fases de la Luna  

NASA Astrophysics Data System (ADS)

This paper presents one of the concepts of Astronomy and its consequent failure in teaching this topic in high school, even when the official documents point out the necessity of Astronomy teaching at this school level. Among the spontaneous conceptions in Astronomy that high school students carry with them, even after the end of the school, we emphasized in this research the Moon phases. The development of different strategies in relation to traditional methods, aimed to teaching-learning process on this topic was considered in this study. These strategies were devised based on the reference frame of the Meaningful Learning, as elaborated by Ausubel. The proposals presented here include the active participation of students in experimental activities and other didactic activities, for their continuous evaluation during the process. These activities finished with a Comics elaboration about the Moon phases. Therefore, the objective of this paper is to present a proposal for differentiated teaching activity about Moon phases supported by the theoretical principles of Meaningful Learning at Physics classes. Este texto foca um dos conteúdos de Astronomia e a consequente falha no ensino deste tema no ensino médio, apesar de os documentos oficiais apresentarem a necessidade de se trabalhar a Astronomia neste nível de ensino. Dentre as concepções alternativas em Astronomia que os alunos do ensino médio carregam consigo, mesmo após o término dos estudos, destacamos, nesta pesquisa, o fenômeno das fases da Lua. O desenvolvimento de estratégias diferenciadas em relação ao ensino tradicional, visando o processo de ensino-aprendizagem sobre este tema, foi contemplado neste trabalho como um dos resultados obtidos sob a luz dos referenciais da aprendizagem significativa, fundamentados em Ausubel. Segundo a proposta aqui apresentada, a participação ativa dos alunos na execução de uma atividade experimental e outras atividades didáticas, que visam sua contínua avaliação durante o processo, culmina com a elaboração de uma história em quadrinhos envolvendo as fases da Lua. Portanto, o objetivo deste trabalho é apresentar uma proposta de atividade didática diferenciada sustentada pelos princípios teóricos da aprendizagem significativa aplicada ao ensino das fases da Lua durante as aulas de Física no ensino médio. En este trabajo se presenta uno de los contenidos de la Astronomía y el evidente fracaso en la enseñanza del tema en la escuela secundaria, a pesar del hecho que los documentos oficiales apuntan para la necesidad de trabajar contenidos de Astronomía en este nivel. Entre los conceptos alternativos en Astronomía que los alumnos secundarios llevan consigo, aún después de terminados los estudios, destacamos aquí el fenómeno de las fases de la Luna. El desarrollo de diferentes estrategias en relación con los métodos tradicionales, dirigidas al proceso de enseñanza-aprendizaje en este tema fue considerado en este trabajo como uno de los resultados obtenidos a la luz de los referenciales del aprendizaje significativo, tal como fueron fundamentados por Ausubel. Según la propuesta que aquí se presenta, la participación activa de los estudiantes en la ejecución de una actividad experimental y otras actividades educativas destinadas a la evaluación continua durante el proceso culminó en la elaboración de una historieta respecto de las fases de la Luna. Por lo tanto, el objetivo de este trabajo es presentar una propuesta de actividad de enseñanza diferenciada con el apoyo de los principios teóricos del aprendizaje significativo aplicado a la enseñanza de las fases de la luna durante las clases de física del ciclo secundario.

Martins, Bruno Andrade; Langhi, Rodolfo

2012-12-01

347

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E GERENCIAMENTO Tecnologia de Satélites petronio.souza@lit.inpe.br CSE-201-4 Introdução à Engenharia de Sistemas Espaciais

348

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E;2 CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E Tecnologia de Satélites petronio.souza@lit.inpe.br CSE-201-4 Introdução à Engenharia de Sistemas Espaciais

349

Ventos em supergigantes B[e] das nuvens de Magalhães e da Galáxia  

NASA Astrophysics Data System (ADS)

As Supergigantes B[e] apresentam as seguintes características: (i) alta luminosidade; (ii) espectro típico de estrelas de tipo B; (iii) linhas permitidas e proibidas em emissão de metais de baixa ionização, especialmente FeII; (iv) linhas de Balmer, e por vêzes também dos ions HeI e FeII, com perfis tipo P Cygni indicativos de altas taxas de perda de massa. Atualmente estamos desenvolvendo um projeto que visa comparar as propriedades fisicas (principalmente e v¥) dos ventos destes objetos nas Nuvens de Magalhães e na Galaxia. O objetivo é estudar a influência da metalicidade. No presente painel apresentamos uma determinação das velocidades terminais de 11 estrelas, sendo 4 na GNM (Hen S111, 66, R126 e Hen S93), 4 na PNM (Hen S18, S23, S65 e R4) e 3 na Galaxia (CPD-529243, MWC 300 e GG Car). Nossos dados são espectros de alta resolução obtidos no telescópio 1.52m do ESO com o espectrógrafo FEROS. Para determinar as velocidades terminais usamos as linhas Hd e HeI 3888 Å cujas componentes em absorção costumam estar livres de "blends" e estruturas. Nossos resultados sugerem que as velocidades de expansão na GNM são maiores (ainda que apenas ligeiramente) do que aquelas da PNM, como esperado. No entanto, os objetos da Galaxia não parecem seguir a mesma tendência.

de Araújo, F. X.; Pilling, D. A.; Pereira, C. B.; Fernandes, M. B.

2003-08-01

350

Investigao em clulas estaminais no Biocant deu origem a cinco patentes em dois anos  

E-print Network

Investigação em células estaminais no Biocant deu origem a cinco patentes em dois anos, nos últimos dois anos, em cinco patentes, duas delas já licenciadas a empresas, disse à Lusa o vias de dar origem a um projeto empresarial" no âmbito do rastreio e criação de novos fármacos. As duas

Instituto de Sistemas e Robotica

351

Oficinas aprovadas OF1 Ensino de portugus como segunda lngua: uma abordagem bilngue para surdos  

E-print Network

(HQ's): análise de livros didáticos de ensino de Espanhol/LE Carolina Parrini Ferreira e Camila no ensino de E/LE; ii) analisar o uso do gênero HQ em livros didáticos para o ensino de E/LE; iii) propor tem o potencial de dar vida ao livro didático, através da criação de personagens e contações. Propomos

352

FACULDADE DE CEILNDIA CAMPUS UnB CEILNDIA PROGRAMA DE PS-GRADUAO EM CINCIAS E TECNOLOGIAS EM SADE  

E-print Network

1 FACULDADE DE CEILÂNDIA ­ CAMPUS UnB CEILÂNDIA PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIAS E TECNOLOGIAS TECNOLOGIAS EM SAÚDE PARA OS CURSOS DE MESTRADO ACADÊMICO E DOUTORADO PARA O PRIMEIRO PERÍODO LETIVO DE 2012 1. PREÂMBULO 1.1. A Coordenadora do Programa de Pós-Graduação em Ciências e Tecnologias em Saúde, no uso de

Lucero, Jorge Carlos

353

EMS offshore. A new horizon for paramedics.  

PubMed

The difficulty in getting medical aid to offshore drilling platforms can be a source of life-threatening delays. Recently, some companies have charted new waters by actually stationing EMS crews on their rigs. PMID:10116023

Mallard, A S

1991-10-01

354

EM-dissertations completed in 2007  

E-print Network

2007 #12;Virtual Thermo-Mechanical Prototyping of Microelectronics Devices Driel, W.D. van Advisors-90-9022179-3 EM research theme: Computational and Experimental Mechanics Thermomechanical fatigue failure

Franssen, Michael

355

Informatização das escolas: uma análise do impacto das tecnologias da informação e comunicação sobre o trabalho docente  

Microsoft Academic Search

O artigo tem como objeto de estudo o impacto da informa- tização das escolas no trabalho docente, tendo em vista a urgência em se discutir o uso das Tecnologias da Informa- ção e Comunicação - TICs - no contexto educacional, a fim de se evitar, com isso, possíveis deslumbramentos (BELLONI, 2001, p. 73), que tendem a levar ao uso indiscriminado

Jacqueline de Castro Laranjo

2008-01-01

356

Massa do gás e das estrelas em aglomerados: eficiência da formação estelar  

NASA Astrophysics Data System (ADS)

Os aglomerados de galáxias apresentam um interesse especial para a cosmologia observacional. Eles são as maiores estruturas ligadas pela gravitação no Universo e relaxadas na região central. A comparação entre a massa do gás intra-aglomerado (responsável por ~25% da massa total, inferida a partir de observações em raios-X), a massa contida nas estrelas (i.e., nas galáxias) e a massa total (incluindo a matéria escura não bariônica), nos dá informações importantes sobre os processos de formação e evolução de aglomerados. Por exemplo, a razão entre a massa do gás e a massa total é uma medida da fração de bárions no Universo (razão entre a matéria bariônica e matéria escura) e, utilizando a densidade de bárions predita pela nucleosíntese primordial, podemos deduzir a densidade de matéria escura no Universo (cf. White et al. 1993). O objetivo deste trabalho é obter as razões entre as massas do gás, estelar (contida nas galáxias), e a total (massa dinâmica). As massas do gás e total são obtidas a partir das análises fotométrica e espectroscópica em raios-X enquanto que a massa estelar é obtida pela análise fotométrica das galáxias. Esta análise foi aplicada ao aglomerado Abell 496 observado pelo satélite XMM-Newton. A massa contida nas galáxias foi estimada a partir da função de luminosidade obtida por Durret et al. (2002). Para determinar as massas dinâmica e do gás nos precisamos determinar os perfis radiais de densidade e temperatura. Nós apresentaremos aqui estes resultados e suas implicações na eficiência da formação estelar em Abell 496.

Laganá, T. F.; Lima Neto, G. B.

2003-08-01

357

Condições físicas em galáxias HII  

NASA Astrophysics Data System (ADS)

Galáxias HII são galáxias anãs de baixa luminosidade que apresentam alta taxa de formação estelar. Seus espectros são dominados por intensas linhas de emissão devido à fotoionização pela presença de um grande número de estrelas do tipo O e B. Nós apresentamos um catálogo espectrofotométrico de 111 galáxias HII observadas no telescópio 1.52m do ESO com o espectrógrafo Boller & Chivens. Determinamos propriedades estatísticas da amostra e derivamos condições físicas (temperatura eletrônica, densidade eletrônica) e abundâncias químicas. Para algumas galáxias, fomos também capazes de resolver espacialmente regiões de formação estelar individuais e determinar propriedades espectroscópicas para estas regiões separadamente, o que nos permitiu avaliar as flutuações das condições físico-químicas dentro das galáxias HII. Em particular, vimos que apesar das galáxias HII apresentarem formação estelar espalhada ao longo do corpo da galáxia, são objetos quimicamente homogêneos. A fim de estudar a evolução temporal dos objetos durante o tempo de vida das estrelas ionizantes construimos também alguns diagramas relacionando razões de linhas de emissão com a largura equivalente de Hb (EW(Hb)). Para interpretar tais diagramas utilizamos modelos de fotoionização para populações estelares integradas. Concluímos que as galáxias HII não correspondem a simples idéia de um burst instantâneo envolvido por um gás opaco aos fótons ionizantes e com densidade constante. As relações observadas entre razões de linhas e EW(Hb) podem ser melhor compreendidas se as galáxias HII apresentarem populações estelares mais velhas, que contribuem para o contínuo óptico observado.

Kehrig, C.; Telles, E.; Cuisinier, F.

2003-08-01

358

Sonification of Kepler Field SU UMa Cataclysmic Variable Stars V344 Lyr and V1504 Cyg  

NASA Technical Reports Server (NTRS)

Sonification is the conversion of quantitative data into sound. In this work we explain the methods used in the sonification of light curves provided by the Kepler instrument from Q2 through Q6 for the cataclysmic variable systems V344 Lyr and V1504 Cyg . Both systems are SU UMa stars showing dwarf nova outbursts and superoutbursts as well as positive and negative superhumps. Focused sonifications were done from average pulse shapes of each superhump, and separate sonifications of the full, residual light curves were done for both stars. The audio of these data reflected distinct patterns within the evolutions of supercycles and superhumps that matched pervious observations and proved to be effective aids in data analysis.

Tutchton, Roxanne M.; Wood, Matt A.; Still, Martin D.; Howell, Steve B.; Cannizzo, John K.; Smale, Alan P.

2012-01-01

359

Buckets of Ash Track Tephra Flux From Halema`uma`u Crater, Hawai`i  

NASA Astrophysics Data System (ADS)

The 2008-2009 eruption at K?lauea Volcano's summit made news because of its eight small discrete explosive eruptions and noxious volcanic smog (vog) created from outgassing sulfur dioxide. Less appreciated is the ongoing, weak, but continuous output of tephra, primarily ash, from the new open vent in Halema`uma`u Crater. This tephra holds clues to processes causing the eruption and forming the new crater-in-a-crater, and its flux is important to hazard evaluations. The setting of the vent—easily accessible from the Hawaiian Volcano Observatory (HVO)—is unusually favorable for near-daily tracking of tephra mass flux during this small prolonged basaltic eruption. Recognizing this, scientists from HVO are collecting ash and documenting how ejection masses, components, and chemical compositions vary through time.

Swanson, Don; Wooten, Kelly; Orr, Tim

2009-11-01

360

BVRcIc Observations and Analyses on V2421 Cygni, a Precontact W UMa Binary  

NASA Astrophysics Data System (ADS)

We present the first precision BVRI light curves, synthetic light curve solutions, and a period study for the high amplitude solar type binary, V2421 Cygni. The light curves have the appearance of an Algol (EA) type; however, it is made up of dwarf solar type components in a detached mode with a period of only 0.6331 days with an amplitude of about a full magnitude, i.e., it is a precontact W UMa binary. Flare-like disruptions occur in the light curves following the primary and secondary eclipses possibly due to the line-of-sight track of a gas stream. An associated stream spot and splash spot cause bright equatorial spots on the stellar surface of the primary star. The more massive star is the gainer, making this system a classic, albeit dwarf, Algol.

Samec, R. G.; Shebs, Travis S.; Faulkner, D. R.; Van Hamme, W.; Mathis, R. F.

2014-01-01

361

Ultra-weak magnetic fields in Am stars: ? UMa and ? Leo  

NASA Astrophysics Data System (ADS)

An extremely weak circularly-polarized signature was recently discovered in spectral lines of the chemically peculiar Am star Sirius A (Petit et al. 2011). This signal was interpreted as a Zeeman signature related to a sub-gauss longitudinal magnetic field, constituting the first detection of a surface magnetic field in an Am star. We present here ultra-deep spectropolarimetric observations of two other bright Am stars, ? UMa and ? Leo, observed with the NARVAL spectropolarimeter. The line profiles of the two stars display circularly-polarized signatures similar in shape to the observations gathered for Sirius A. These new detections suggest that very weak magnetic fields may be present in the photospheres of a significant fraction of intermediate-mass stars, although the strongly asymmetric Zeeman signatures measured so far in Am stars (featuring a prominent positive lobe and no detected negative lobe) are not expected in the standard theory of the Zeeman effect.

Blazère, A.; Petit, P.; Lignières, F.; Aurière, M.; Böhm, T.; Wade, G.

2014-12-01

362

VizieR Online Data Catalog: Initial masses of W UMa type contact binaries (Yildiz+, 2013)  

NASA Astrophysics Data System (ADS)

W UMa type binaries have two defining characteristics. These are (i) the effective temperatures of both components are very similar, and (ii) the secondary (currently less massive) component is overluminous for its current mass. We consider the latter to be an indication of its mass before the mass transfer event. For these stars, we define a mass difference (?M) between the mass determined from its luminosity and the present mass determined from fitting the binary orbit. We compare the observed values of the mass difference to stellar models with mass-loss. The range of initial secondary masses that we find for observed W UMa type binaries is 1.3-2.6M?. We discover that the A- and the W-subtype contact binaries have different ranges of initial secondary masses. Binary systems with an initial mass higher than 1.8+/-0.1M? become A-subtype while systems with initial masses lower than this become W-subtype. Only 6 per cent of systems violate this behaviour. We also obtain the initial masses of the primaries using the following constraint for the reciprocal of the initial mass ratio: 0<1/qi<1. The range of initial masses we find for the primaries is 0.2-1.5M?, except for two systems. Finally in comparing our models to observed systems, we find evidence that the mass transfer process is not conservative. We find that only 34 per cent of the mass from the secondary is transferred to the primary. The remainder is lost from the system. (2 data files).

Yildiz, M.; Dogan, T.

2014-04-01

363

de energia elétrica em equipamentos de energia elétrica em equipamentos de energia elétrica em equipamentos de energia elétrica em equipamentos de energia elétrica em equipamentos utilizados em galpão de frangos de corte utilizados em galpão de frangos de corte utilizados em galpão de frangos de corte utilizados em galpão de frangos de corte utilizados em galpão de frangos de corte  

Microsoft Academic Search

2 FCAV\\/UNESP. Fone: (16) 3209-2637 3 FCAV\\/UNESP. Fone: (16) 3209-2654 Resumo: Resumo: Resumo: Resumo: Resumo: Este trabalho teve por objetivo analisar o consumo e o custo da energia elétrica em um galpão comercial de frangos de corte, durante dois ciclos de criação, inverno e verão. Foram realizadas medidas de consumo dos ventiladores, nebulizadores, lâmpadas e comedouros durante o manejo de

José E. P. Turco; Luiz F. S. A. Ferreira; Renato L. Furlan

364

Plume Created From a Collapse of the Upper Portion of the Halema'uma'u Vent Cavity  

USGS Multimedia Gallery

With lava retreating deeper into the Halema'uma'u vent cavity over the past two days, the cavity walls have experienced more frequent collapses. At 2:23pm today (March 7), a collapse from the upper portion of the vent cavity produced a robust brown plume, but did not eject any large particles....

365

The X-ray/EUV selected binary 2RE J0933+624 (FF UMa): orbital solution and chromospheric activity  

E-print Network

The X-ray/EUV selected binary 2RE J0933+624 (FF UMa): orbital solution and chromospheric activity M the chromosphere of this active binary system using the information provided for several optical spectroscopic features (from the Ca ii H & K to Ca ii IRT lines) that are formed at different heights in the chromosphere

Complutense de Madrid, Universidad

366

DEZ ANOS DE EXPERIÊNCIA DO COMITÊ DE ÉTICA EM PESQUISA DA SECRETARIA DE SAÚDE DO DISTRITO FEDERAL, BRASIL  

PubMed Central

O objetivo deste artigo é relatar a experiência do Comitê de Ética em Pesquisa da Secretaria de Estado de Saúde do Distrito Federal (CEP/SES/DF) Brasil, durante o período de 10 anos a partir de sua fundação. Trata-se de uma avaliação descritiva e documental, na modalidade estudo de caso, utilizando-se a totalidade de projetos protocolados no CEP/SES/DF (N° 052/08) nesse período. As pendências mais freqüentes dos projetos foram: termo de consentimento livre e esclarecido (30%), folha de rosto (25%), metodologia (20%), curriculum vitae (12%), planilha de orçamento (9%), outros (4%). O relato das atividades do CEP/SES/DF no período de 10 anos revelou, através de sua produtividade, a legitimidade do processo de análise ética dos protocolos visando à proteção dos participantes da pesquisa. PMID:19888441

Novaes, Maria Rita C. G.; Guilhem, Dirce; Lolas, Fernando

2009-01-01

367

Tour of the Electromagnetic Spectrum (EMS) Videos  

NSDL National Science Digital Library

These videos introduce middle- and high school-age learners to the electromagnetic spectrum. The product consists of 8 animations including an introduction to electromagnetic waves and one animation for each wavelength of the EM spectrum (Radio, Microwave, Infrared, Visible, Ultraviolet, X-Rays and Gamma Rays). Each wavelength of the EM spectrum offers a construct to illustrate and teach about NASA sensors, missions, and science. Emphasis is placed on relevant science, such as lunar exploration, and hot science topics, such as climate change. The examples and narrative for each wavelength animation build on the learners’ prior knowledge then introduces examples from NASA missions. These examples explore the use of spectral analysis and visualizations that help scientists make discoveries about the world around us using EM waves.

Troy Benesch

2009-01-01

368

Spectroscopic Analyses of the Planetary System Candidates: 55 Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762  

E-print Network

The stars 55 Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762 have recently been proposed to harbor planetary mass companions. Using spectrospic methods we find that 55 Cnc and 51 Peg are super metal- rich, 47 UMa and 70 Vir have roughly solar metallicities, and HD 114762 is metal-poor. Otherwise, the abundance patterns, expressed as [X/Fe], are approximately solar. The ages of 47 UMa and 51 Peg are similar to that of the Sun; 70 Vir is slightly older, and 55 Cnc and HD 114762 are at least 10 Gyr old. Our estimates of vsini for the parent stars are 1.4, 1.8, 2.0, Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762, respectively. Using these data and estimates for the rotation periods and radii, the corresponding masses of the companions are: > 0.6, 0.51, 4.6, > 20, and > 8.5 MJ. The systems appear to fall into three groups: roughly Jupiter mass companions with small circular orbits with metal-rich parent stars (55 Cnc and 51 Peg), larger companions with larger circular orbits (47 UMa), and much more massive companions with large eccentric orbits around moderately metal- poor parent stars (70 Vir and HD 114762). Our findings are consistent with the recently proposed mechanism whereby a gas giant migrates to within a few hundredths of an AU of its parent star during the formative epoch of the planetary system. During this process the material between the giant planet and the star is accreted onto the latter. If the accreted material is depleted in H and He, then the photospheric composition of the parent star might be altered significantly.

Guillermo Gonzalez

1996-09-20

369

EM-ONE : an architecture for reflective commonsense thinking  

E-print Network

This thesis describes EM-ONE, an architecture for commonsense thinking capable of reflective reasoning about situations involving physical, social, and mental dimensions. EM-ONE uses as its knowledge base a library of ...

Singh, Pushpinder, 1972-2006.

2005-01-01

370

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM COMBUSTÃO E Mendonça do IAE/CTA, Univ. Pennsylvania, USA, 1997 #12;CURSO DE ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE

371

ECE 341: Electromagnetic Fields I EM devices and systems  

E-print Network

in material media - Electromagnetic induction - Inductance - Magnetic energy Applications: - ElectronicsECE 341: Electromagnetic Fields I EM devices and systems - Can compute and analyze potentials compositions - Can evaluate capacitance, inductance, resistance, and conductance of EM structures - Understands

Schumacher, Russ

372

Optimization of ultrasonic\\/microwave assisted extraction (UMAE) of polysaccharides from Inonotus obliquus and evaluation of its anti-tumor activities  

Microsoft Academic Search

Recently, the use of ultrasonic and microwave has attracted considerable interest as an alternative approach to the traditional extraction methods. In this paper, in order to maximize the yield and purity of polysaccharides from Inonotus obliquus, response surface methodology (RSM) was employed to optimize the ultrasonic\\/microwave assisted extraction (UMAE) conditions. The results indicated that the optimal conditions for UMAE were

Yiyong Chen; Xiaohong Gu; Sheng-quan Huang; Jinwei Li; Xin Wang; Jian Tang

2010-01-01

373

THE MULTI-COLOR LIGHT CURVES OF THE W UMa TYPE CONTACT BINARY EP ANDROMEDAE  

SciTech Connect

New multi-color CCD photometric light curves of the eclipsing binary EP And were obtained over six nights in 2006, 2011, and 2012. Using the Wilson-Devinney code, we computed the photometric elements of this system. It was discovered that EP And is a W-type W UMa contact binary system with a mass ratio of q = 2.685 and a degree of contact factor f = 24.9%, rather than an A-type system. Combining 28 newly determined times of minimum light derived from 1999 to 2012 with others collected from the literature, a long-term increase (dP/dt = +5.22 Multiplication-Sign 10{sup -8} days yr{sup -1}) with a sinusoidal variation (A = 0.0109 days; T = 40.89 yr) in the orbital period was found. The orbital period secular increases may be interpreted as conservative mass transfer from the less massive component to the more massive one, and cyclic variations of the orbital period may be caused by the light-travel time effect through the presence of a third body. The evolutionary status and the age of the system are also discussed.

Liao, W.-P.; Qian, S.-B.; Li, K.; He, J.-J.; Zhao, E.-G.; Zhou, X., E-mail: liaowp@ynao.ac.cn [Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming (China)

2013-10-01

374

An Extensive Analysis of the Triple W UMa Type Binary FI Boo  

NASA Astrophysics Data System (ADS)

We present a detailed analysis of the interesting W UMa binary FI Boo in view of the spectroscopic signature of a third body through photometry, period variation, and a thorough investigation of solution uniqueness. We obtained new BVRcIc photometric data that, when combined with spectroscopic data, enable us to analyze the system FI Boo and determine its basic orbital and physical properties through PHOEBE, as well as the period variation by studying the times of the minima. This combined approach allows us to study the long-term period changes in the system for the first time in order to investigate the presence of a third body and to check extensively the solution uniqueness and the uncertainties of derived parameters. Our modeling indicates that FI Boo is a W-type moderate (f = 50.15% ± 8.10%) overcontact binary with component masses of M h = 0.40 ± 0.05 M ? and M c = 1.07 ± 0.05 M ?, temperatures of T h = 5746 ± 33 K and T c = 5420 ± 56 K, and a third body, which may play an important role in the formation and evolution. The results were tested by heuristic scanning and parameter kicking to provide the consistent and reliable set of parameters that was used to obtain the initial masses of the progenitors (1.71 ± 0.10 M ? and 0.63 ± 0.01 M ?, respectively). We also investigated the evolutionary status of massive components with several sets of widely used isochrones.

Christopoulou, P.-E.; Papageorgiou, A.

2013-12-01

375

A CCD photometric study of the W UMa contact binary Y Sextantis  

NASA Astrophysics Data System (ADS)

A V light curve of the W UMa contact binary Y Sex is presented in this paper. From the observations, two times of minimum light was determined and from the present times of minimum light and those collected from the references, the change in the orbital period of the system was analyzed with the method of Kalimeris et al. [A&A 282 (1994) 775]. The result reveals that the orbital period of the system oscillates with a cycle of about 50 years and an amplitude of 1.1×10 -6 days. The light curve was analyzed by means of the latest version of the Wilson-Devinney code, which was also used to correct photometric effects on the radial-velocity curve obtained by McLean and Hilditch [MNRAS 203 (1983) 1]. The results suggest that Y Sex is an A-subtype contact binary with a mass ratio of q=0.180(2). In the new photometric solution, a positive value of the third light of the system suggests that the sinusoidal variation of the period could be caused by a third component in the system. The absolute dimensions of Y Sex are found to be: M1=1.21(18) M ?, M2=0.22(3) M ?, R1=1.50(2) R ?, R2=0.75(1) R ?, L1=3.00(44) L ?, L2=0.69(10) L ?, A=2.66(11) R ?.

Yang, Yulan; Liu, Qingyao

2003-07-01

376

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E GERENCIAMENTO DE SISTEMAS ESPACIAIS 1º Período Obrigatória para o Mestrado e o Doutorado CSE-200-4 Introdução à Tecnologia de Satélites otavio

377

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E GERENCIAMENTO DE SISTEMAS ESPACIAIS 1º Período Obrigatória para o Mestrado e o Doutorado CSE-200-4 Introdução à Tecnologia de Satélites petronio

378

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM ENGENHARIA E, ITA, Brasil, 1990 #12;2 CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE Doutorado CSE-200-4 Introdução à Tecnologia de Satélites CSE-201-4 Introdução à Engenharia de Sistemas

379

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM MECÂNICA TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM MECÂNICA ESPACIAL E CONTROLE RELAÇÃO DAS DISCIPLINAS SEPARADAS Ciência, Engenharia e Tecnologia I CMC-325-3 Teoria de Visualização Gráfica Tridimensional I: Algoritmos

380

CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM CIÊNCIA E TECNOLOGIA DE MATERIAIS E SENSORES Coordenador Acadêmico do Curso Evandro Marconi Rocco Coordenador Acadêmico TECNOLOGIA ESPACIAIS ÁREA DE CONCENTRAÇÃO EM CIÊNCIA E TECNOLOGIA DE MATERIAIS E SENSORES 1o Período Letivo

381

Development of Em18-immunoblot and Em18-ELISA for specific diagnosis of alveolar echinococcosis.  

PubMed

Extensive experience has documented that Em2(plus)-ELISA, Em10-ELISA and Em18-immunoblot and Em18-ELISA are reliable serologic methods for detection of alveolar echinococcosis (AE) caused by the metacestodes of Echinococcus multilocularis. Among these, tests based on detection of antibodies to the specific Em18 antigen, either immunoblot or ELISA, appears to be the most specific for AE. Between 90 and 97% of AE cases with characteristic hepatic lesions detectable by image analysis have been positive in Em18-serology. In contrast Antigen B (8 kDa)-immunoblot is the most sensitive for all forms of echinococcosis, although it can not differentiate AE from cystic echinococcosis (CE). Primary serologic screening for echinococcosis, especially for CE using hydatid cyst fluid of Echinococcus granulosus appears to be highly sensitive in endemic areas. Glycoproteins (GPs) purified from cyst fluid of Taenia solium are highly specific for diagnosis of T. solium neuorcysticercosis (NCC). Using currently available antigens it is not difficult to differentiate these three larval cestodiases serologically. We recommend that (1) primary screening of CE in endemic areas should be carried out using hydatid cyst fluid of E. granulosus prepared from cysts in either sheep, human or mouse for immunoblot and from sheep or mouse for ELISA, (2) both primary screening and confirmation of AE in endemic areas should be carried out using Em18-ELISA, Em18-immunoblot or Em2(plus)-ELISA. Serodiagnosis in areas where both AE and CE are endemic, such as in China, should be carried out as a combination of (1) and (2), and (3) serology of NCC should be carried out using GP-ELISA or GP-immunoblot. All samples showing antibody to Em18 are exclusively from echinococcosis cases. There have been no false positive test reactions with sera from other diseases. Strongest Em18 responders are all from patients with AE but some weaker responses may be found in sera of persons with advanced complex lesions of CE. These highly reliable serodiagnostic methods using native, recombinant and synthetic antigens are briefly summarized and experiences with these methods in Japan is reviewed. We believe that use of these specific antigens in screening and confirmation programs for AE in Japan will improve specificity and reduce the confusion, anxiety and expense in persons whose sera give false positive reactions with crude echinococcal antigens. PMID:12606094

Ito, Akira; Sako, Yasuhito; Yamasaki, Hiroshi; Mamuti, Wulamu; Nakaya, Kazuhiro; Nakao, Minoru; Ishikawa, Yuji

2003-02-01

382

Metodos Matematicos em Financas Junho -Agosto 2005  

E-print Network

decimais (t = 5) usando truncamento (e.g. 1.23459 1.2345). Voce ´e capaz de conseguir as duas ra´izes com 5 d´igitos de precis~ao em tal aritm´etica? (b) Encontre a raiz de menor valor absoluto da equa

Zubelli, Jorge Passamani

383

Frmions ultra-frios em redes ticas  

E-print Network

Efeito Zeeman BEEE µ=-= )()( |S MS >>>> | >>>> | >>>> Na presença de um campo magnéticoNa presença de um campo Corrida em busca do antiferromagnetismo #12;Experimentos · Schneider et al. Science 322, 1520 (2008

Liu, I-Shih

384

EMS Division Potential Benefits of Selected  

E-print Network

Propulsion Systems have been Demonstrated Eg-Walters1: "In 1980 a 300 KW superconductive homopolar generator Homopolar Motors & Projections for Ship Propulsion Topics NOTE: Search for the interplay of technical disciplines!!!!! #12;EMS Division Homopolar Motor Outline ·Homopolar Motor Basics ·Homopolar Motor Technology

385

GEOBULLETIN DEcEmBEr 16Th  

E-print Network

are requested! If you have a news item, a request, an announcement etc. email it to geodept@geology at the University of New South Wales, Sydney, Australia. #12;GEOBULLETIN DEcEmBEr 16Th , 2011 - 3 - 1) Relationship Australia. The North Pole region hosts the oldest fossil life on Earth, as stromatolites in carbonates

Sheridan, Jennifer

386

Transportes em Revista.com Pas: Portugal  

E-print Network

veículos Toyota Prius Plug-in (automóvel híbrido cujas baterias também são alimentadas por tomada elétrica Comentar artigo Imprimir PDF Enviar a um amigo 09 -10 -2012 Toyota aposta no hidrogénio para ve ículos Plug-in em Paris 21 -08 -2012 Toyota lan ça novo Auris com motoriza ção híbrida 20 -08 -2012 MAN

Instituto de Sistemas e Robotica

387

EM PROPAGATION IN JET ENGINE TURBINES  

Microsoft Academic Search

There is interest in the propagation of EM signals inside jet engine turbines for a number of reasons. Applications include radar scattering phenomenology and jet engine plasma plume formation studies. In our research, we are interested in the communication channel characteristics for micro-size wireless sensors attached to the turbine blades that measure parameters such as strain and temperature. Propagation measurements

Eric Walton; Jonathan Young; Jim Moore; Kyle Davis

388

CURSO DE PS-GRADUAO EM ASTROFSICA  

E-print Network

CURSO DE PÓS-GRADUAÇÃO EM ASTROFÍSICA Coordenador Acadêmico Cláudia Vilega Rodrigues Conselho de curso André de Castro Milone Cláudia Vilega Rodrigues José Carlos Neves de Araújo Odylio Denys de Aguiar, Doutor, INPE, 1995 Cláudia Vilega Rodrigues, Doutora, USP, 1997 Dennis Bessada, Doutor, INPE, 2010 Emília

389

enhancem ent of em ission and absorption  

E-print Network

Resonant enhancem ent of em ission and absorption using frequency selective surfaces investigate the infrared properties of frequency selective surfaces consisting of alum inum patches on silicon Elsevier Science B.V. All rights reserved. Keywords: Frequency selective surfaces; Absorption; Infrared 1.I

Schaich, William L.

390

ESPÉCIES DO GÊNERO Eimeria (APICOMPLEXA: EIMERIIDAE) EM TAMANDUÁS-BANDEIRA (Myrmecophaga tridactyla LINNAEUS, 1758) EM CATIVEIRO  

Microsoft Academic Search

1 ABSTRACT:- FREITAS, F.L. DA C.; ALMEIDA, K. DE S.; ZANETTI, A.S.; NASCIMENTO, A.A. DO; MACHADO, C. R.; MACHADO, R.Z. (Species of the genus Eimeria (Apicomplexa: Eimeriidae) in giant anteaters (Myrmecophaga tridactyla Linnaeus, 1758) in captivity). Espécies do gênero Eimeria (Apicomplexa: Eimeriidae) em Tamanduás-bandeira (Myrmecophaga tridactyla Linnaeus, 1758) em cativeiro. Revista Brasileira de Parasitologia Veterinária, v. 15, n. 1, p.

FAGNER LUIZ DA C. FREITAS; ANDRÉ S. ZANETTI; CÉLIO R. MACHADO; ROSANGELA Z. MACHADO

391

Marine EM in GOM: Advances and outlook  

NASA Astrophysics Data System (ADS)

Marine electromagnetic (EM) sounding methods provide valuable complementary information to conventional seismic exploration methods and success stories have been claimed by several oil companies: 1) as indicator of hydrocarbon presence derived from strong resistive anomalies 2) as complimentary tool in structural exploration. While 3D seismic identifies geological structures, it does not directly reveal the fluid content (hydrocarbons). Marine EM sounding exploits variations in electrical resistivity, and is directly sensitive to fluid saturation and thus resistive hydrocarbons. Under the right circumstances it can confirm the presence of hydrocarbons by identifying their resistive characteristics. This means that the possibility of drilling dry exploration wells is significantly reduced, as is the need for extensive appraisal drilling. EM data is used to resolve ambiguities in the structural interpretation of seismic data. For example, whereas the top of a diapiric salt body is often well constrained by seismic data, the position of the lower boundaries is often more elusive. Carbonate (or salt blankets, or resistive basalt) layers complicate the detection and characterization of deeper structure because of diffusive scattering in the layer. However, the resistivity contrast between these layers and the sediments below is an ideal target for EM sounding methods. Recently, two marine EM methods have become popular: The controlled source EM (CSEM) method and magnetotellurics (MT). The CSEM method uses an electric dipole source to transmit low frequency electromagnetic signals to an array of receivers that measure the electromagnetic field at the seafloor. Variation in amplitude and phase of the received signal as the source is towed through the receiver array yield the resistivity structure of the sub-surface to depths of several kilometers. The MT method uses naturally occurring electromagnetic source fields to determine the resistivity of the sub-surface. Thus, by studying the variation in response as a function of frequency, the variation in resistivity as a function of depth may be determined. These methods give complementary information about the resistivity structure of the sub-seafloor. Whereas CSEM data are primarily sensitive to resistive structures, and in particular to layers that are thin compared to their depth of burial, MT data can constrain larger scale conductive structure. By combining natural and controlled source methods better constraints on the geometry and properties of the seafloor can be gained than from either data type alone. Several case histories with large salt structures in the section illustrate that the techniques are useful for future exploration in the GOM. We see the technology moving from its present focus of deep water to include shallower water depths (where CSEM sounding is presently restricted). In addition, we envision the integration of complimentary EM techniques to get a better constrained resistivity image of the subsurface.

MacGregor, L. M.; Strack, K. M.

2005-05-01

392

BUSCA LOCAL PARA POS-PROCESSAMENTO EM RESULTADOS DE OTIMIZAC~AO MULTI-OBJETIVO EM REDES DE FILAS  

E-print Network

BUSCA LOCAL PARA P´OS-PROCESSAMENTO EM RESULTADOS DE OTIMIZA¸C~AO MULTI-OBJETIVO EM REDES DE FILAS otimiza¸c~ao de redes de filas finitas, a capacidade total do sistema em ´areas de espera deve ser a menor algoritmo simulated annealing foi desenvolvido, especialmente para redes de filas finitas, produzindo solu

Cruz, Frederico

393

Patterns of behavior in Kilauea's Halema`uma`u lava lake during 2011 and 1911  

NASA Astrophysics Data System (ADS)

The past three and a half years of activity in the Halema`uma`u vent, at the summit of Kilauea Volcano, have provided a robust observational dataset and allowed us to generalize on many aspects of behavior in the lava lake. The current lava lake normally has been 100-150 m in diameter and contained deep (70-220 m) within a slowly enlarging, fume-filled crater. The lava level fluctuates over both long- and short-term intervals, over a total height range of about 150 m. Over the long term (days to weeks) the lava level correlates directly with summit tilt at a consistent rate, sympathetic with the frequent summit deflation-inflation (DI) events, indicating the lava level is related, in large part, to the pressure state of the summit magma reservoir. On a short term, the lava level experiences rise-fall cycles ("gas pistoning") of 10-20 m height changes, with time spans of minutes to hours, which are due to shallow accumulation and release of gas. The lava lake also abruptly dropped about 150 m during the March 2011 east-rift intrusion and Kamoamoa eruption, presumably due to the rapid evacuation of magma from the summit reservoir. The lava surface is composed of large (decameter-scale) crustal plates, whose size is inversely related to the surface migration velocity. The surface crust moves at a relatively slow velocity (often 0.2-1 m/s), similar to velocities at other lava lakes on Kilauea (Mauna Ulu, Kupaianaha) and elsewhere worldwide (Erebus, Erta Ale), and usually in a direction that is maintained for months. Spattering is generally continuous and directly linked to the circulation pattern; spattering normally occurs at the spot of lava downwelling. Spattering intensity correlates directly with seismic tremor levels, suggesting that the bulk of summit tremor is related to gas release from the lava surface. These characteristics of the modern lava lake have both important similarities and differences compared to the Halema`uma`u lava lake observed by volcanologist Frank Perret in the summer of 1911 and other scientists until 1924. The lava lake then was in a much larger pit than it is today, and the surface structure of the lake, composed of grottoes, islands, divergent flow patterns and subordinate ponds, appears to have been more segmented, complex and expansive than the simple surface geometry today. Short-term lava level fluctuations, resembling gas pistoning in description, also appear to have been present and caused by shallow gas build-up and release. The lava level, in general, was 100-150 m higher than it is today. Like today, spattering in the lake was persistent at the site of lava downwelling and, in many cases, stable through time. Also like today, the spattering behavior was tied to the lava circulation pattern in a consistent manner. The shared behaviors, including short-term lava level fluctuations (gas pistoning) and the relation between spattering and circulation pattern, of the early and modern lava lakes may point to processes that are inherent to lava lakes in general and give insight on the nature of gas flow and lava circulation in lava lakes. Differences, such as overall lava level and lake expansiveness, may be due to the difference in rift zone activity, magma supply rate or superficial vent geometry.

Patrick, M. R.; Orr, T. R.

2011-12-01

394

FIRST PHOTOMETRIC INVESTIGATION OF THE NEWLY DISCOVERED W UMa-TYPE BINARY STAR MR Com  

SciTech Connect

By analyzing multi-color light curves of the newly discovered W UMa-type binary, MR Com, we discovered that it is a shallow-contact binary with a degree of contact factor of f = 10.0% {+-} 2.1%. Photometric solutions reveal that MR Com is a W-type system with a mass ratio of q = 3.9 where the less massive component is about 90 K hotter than the more massive one. By investigating all of the available times of minimum light, we found that the general trend of the Observed-Calculated (O - C) curve shows a downward parabolic variation while it undergoes a cyclic variation with a small amplitude of 0.0031 days and a period of 10.1 yr. The downward parabolic change corresponds to a long-term decrease in the orbital period at a rate of P-dot = -5.3 x 10{sup -7} days yr{sup -1} that may be caused by a combination of a mass transfer and an angular momentum loss (AML) via magnetic braking. Among the 16 shallow-contact systems with a decreasing orbital period, MR Com has the lowest mass ratio (e.g., 1/q = 0.26). The shallow-contact configuration, the low-mass ratio, and the long-term period decrease all suggest that systems similar to MR Com are on the AML-controlled stage of the evolutionary scheme proposed by Qian. They will oscillate around a critical mass ratio and evolve into a deep contact with a higher mass ratio. The small-amplitude cyclic change in the O - C curve was analyzed for the light-travel time effect via the presence of an extremely cool stellar companion.

Qian, S.-B.; Liu, N.-P.; Liao, W.-P.; He, J.-J.; Liu, L.; Zhu, L.-Y.; Wang, J.-J.; Zhao, E.-G., E-mail: qsb@ynao.ac.cn [Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming (China)

2013-08-01

395

X-ray spectroscopy of the W UMa-type binary 44 Bootis  

NASA Astrophysics Data System (ADS)

44 Boo B, a W UMa-type binary system, was observed in June 2001 during one entire revolution period with the XMM-Newton observatory. The count rate in the 0.3 to 2 keV band is constant in average with 5 to 20% count rate increases reminiscent of flares. Spectral fitting of the EPIC spectra indicates a corona configuration with little contribution from quiet regions, similar to the Sun. On the contrary, the (2-9) × 106 K temperature range of the ``cool'' plasma suggests that the active corona around the two companions is densely filled with low-lying loops similar to those found in solar-type active regions. The 44 Boo O VII He-like triplet constrains the electron density to an upper limit ne < 8.6 × 1010 cm-3. We argue that this low-lying loop system may be overlaid by larger loops. Magnetic reconnection phenomena in this large loops system may explain the characteristic flare decay time in the light curve that implies loop lengths of about 16 × 109 cm. An extended corona around 44 Boo would explain the absence of eclipses in its X-ray light curve. The average element abundance in 44 Boo corona is found to be lower than the solar photospheric value. The spectral analysis indicates enhanced abundances of oxygen and neon relative to iron which suggest an inverse FIP effect. Compared with other active binary systems such as RSCVn or BY Dra, 44 Boo has relatively less material at temperatures higher than 107 K and the temperature of its hottest plasma component appears to be lower.

Gondoin, P.

2004-11-01

396

X-ray spectroscopy of the W UMa-type binary VW Cephei  

NASA Astrophysics Data System (ADS)

VW Cephei, a W UMa-type binary system, was observed twice with a four week interval in October 2002 by the XMM-Newton space observatory. During the first observation, the source appears to be quiescent. A shallow dip in the X-ray light curve during primary eclipse indicates that the primary and secondary stars both contribute to the X-ray emission which could arise from an extended corona encompassing the two companions. Spectral fitting of the EPIC spectra suggests a corona configuration with little contribution from quiet regions, similar to the Sun. On the contrary, the 0.2-0.8 keV temperature of the ``cool'' plasma components is reminiscent of solar- type active regions, while the hot (T ? 1 keV) component may be caused by disruptions of magnetic fields associated with flaring activity. During the second observation, a large flare occured in the corona above the primary component around the time of primary eclipse. The VW Cep count rate decayed by 30% in about 3.7 ksec and the emission measure of hot (T > 107 K) plasma varied by a factor of 4. The flare was comparable in size to two-ribbon flares observed on the Sun. Intense flaring activity on VW Cep is supported by a neon abundance enhancement relative to oxygen reminiscent of abundance anomalies observed during solar and stellar flares. Compared with other active binary systems such as RS CVn or BY Dra, VW Cep has relatively less material at temperatures higher than 107 K and the temperatures of hot plasmas appear to be lower.

Gondoin, P.

2004-03-01

397

KIC 7524178 - an SU UMa-Type Dwarf Nova Predominantly Showing Negative Superhumps throughout Supercycle  

NASA Astrophysics Data System (ADS)

We analyzed Kepler long-cadence data of KIC 7524178 (= KIS J192254.92+430905.4), and found that it is an SU UMa-type dwarf nova with frequent normal outbursts. The signal of the negative superhump has always been the dominant one, even during the superoutburst, in contrast to our common knowledge about superhumps in dwarf novae. The signal of the positive superhump was only transiently seen during the superoutburst, and it quickly decayed afterward. The frequency variation of the negative superhump was similar to the two previously studied dwarf novae in the Kepler field, V1504 Cyg and V344 Lyr. This is the first object in which the negative superhumps dominate throughout the supercycle. Nevertheless, the superoutburst was faithfully accompanied by the positive superhump, indicating that the tidal eccentric instability is essential for triggering a superoutburst. All the pieces of evidence strengthen the thermal-tidal instability as being the origin of the superoutburst and supercycle, which makes this object the third example in the Kepler field. This object had an unusually small (˜1.0 mag) outburst amplitude, and we considered that this object has a high mass-transfer rate close to the thermal-stability limit of the accretion disk. The average periods of the negative and positive superhumps, and the candidate period of the orbital motion were 0.07288 d (variable in the range 0.0723-0.0731 d), 0.0785 d (variable in the range 0.0772-0.0788 d), and 0.074606(1) d, respectively.

Kato, Taichi; Osaki, Yoji

2013-12-01

398

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae  

NASA Astrophysics Data System (ADS)

We systematically surveyed period variations of superhumps in SU UMa-type dwarf novae based on newly obtained data and past publications. In many systems, the evolution of the superhump period is found to be composed of three distinct stages: an early evolutionary stage with a longer superhump period, a middle stage with systematically varying periods, and a final stage with a shorter, stable superhump period. During the middle stage, many systems with superhump periods of less than 0.08 d show positive period derivatives. We present observational characteristics of these stages and give greatly improved statistics. Contrary to an earlier claim, we found no clear evidence for a variation of period derivatives among different superoutbursts of the same object. We present an interpretation that the lengthening of the superhump period is a result of the outward propagation of an eccentricity wave, which is limited by the radius near the tidal truncation. We interpret that late-stage superhumps are rejuvenated excitation of a 3:1 resonance when superhumps in the outer disk are effectively quenched. The general behavior of the period variation, particularly in systems with short orbital periods, appears to follow a scenario proposed in Kato, Maehara, and Monard (2008, PASJ, 60, L23). We also present an observational summary of WZ Sge-type dwarf novae. Many of them have shown long-enduring superhumps during a post-superoutburst stage having longer periods than those during the main superoutburst. The period derivatives in WZ Sge-type dwarf novae are found to be strongly correlated with the fractional superhump excess, or consequently with the mass ratio. WZ Sge-type dwarf novae with a long-lasting rebrightening or with multiple rebrightenings tend to have smaller period derivatives, and are excellent candidates for those systems around or after the period minimum of evolution of cataclysmic variables.

Kato, Taichi; Imada, Akira; Uemura, Makoto; Nogami, Daisaku; Maehara, Hiroyuki; Ishioka, Ryoko; Baba, Hajime; Matsumoto, Katsura; Iwamatsu, Hidetoshi; Kubota, Kaori; Sugiyasu, Kei; Soejima, Yuichi; Moritani, Yuuki; Ohshima, Tomohito; Ohashi, Hiroyuki; Tanaka, Junpei; Sasada, Mahito; Arai, Akira; Nakajima, Kazuhiro; Kiyota, Seiichiro; Tanabe, Kenji; Imamura, Kazuyoshi; Kunitomi, Nanae; Kunihiro, Kenji; Taguchi, Hiroki; Koizumi, Mitsuo; Yamada, Norimi; Nishi, Yuichi; Kida, Mayumi; Tanaka, Sawa; Ueoka, Rie; Yasui, Hideki; Maruoka, Koichi; Henden, Arne; Oksanen, Arto; Moilanen, Marko; Tikkanen, Petri; Aho, Mika; Monard, Berto; Itoh, Hiroshi; Dubovsky, Pavol A.; Kudzej, Igor; Dancikova, Radka; Vanmunster, Tonny; Pietz, Jochen; Bolt, Greg; Boyd, David; Nelson, Peter; Krajci, Thomas; Cook, Lewis M.; Torii, Ken'ichi; Starkey, Donn R.; Shears, Jeremy; Jensen, Lasse-Teist; Masi, Gianluca; Hynek, Tomáš; Nová; K, Rudolf; Kociá; N, Radek; Krá; L, Lukáš; Ku?á; Ková, Hana; Kolasa, Marek; Štastný, Petr; Staels, Bart; Miller, Ian; Sano, Yasuo; de Ponthière, Pierre; Miyashita, Atsushi; Crawford, Tim; Brady, Steve; Santallo, Roland; Richards, Tom; Martin, Brian; Buczynski, Denis; Richmond, Michael; Kern, Jim; Davis, Stacey; Crabtree, Dustin; Beaulieu, Kevin; Davis, Tracy; Aggleton, Matt; Morelle, Etienne; Pavlenko, Elena P.; Andreev, Maksim; Baklanov, Alexander; Koppelman, Michael D.; Billings, Gary; Urbancok, L'ubomír; Ögmen, Yenal; Heathcote, Bernard; Gomez, Tomas L.; Voloshina, Irina; Retter, Alon; Mularczyk, Krzysztof; Zoczewski, Kamil; Olech, Arkadiasz; Kedzierski, Piotr; Pickard, Roger D.; Stockdale, Chris; Virtanen, Jani; Morikawa, Koichi; Hambsch, Franz-Josef; Garradd, Gordon; Gualdoni, Carlo; Geary, Keith; Omodaka, Toshihiro; Sakai, Nobuyuki; Michel, Raul; Cárdenas, A. A.; Gazeas, Kosmas D.; Niarchos, Panos G.; Yushchenko, Alexander V.; Mallia, Franco; Fiaschi, Marco; Good, Gerry A.; Walker, Stan; James, Nick; Douzu, Ken-Ichi; Julian, Wm Mack, II; Butterworth, Neil D.; Shugarov, Sergey Yu.; Volkov, Igor; Chochol, Drahomir; Katysheva, Natalia; Rosenbush, Alexander E.; Khramtsova, Maria; Kehusmaa, Petri; Reszelski, Maciej; Bedient, James; Liller, William; Pojmanski, Grzegorz; Simonsen, Mike; Stubbings, Rod; Schmeer, Patrick; Muyllaert, Eddy; Kinnunen, Timo; Poyner, Gary; Ripero, Jose; Kriebel, Wolfgang

2009-12-01

399

Photometric Analysis of the Recently Discovered W UMa Star NR Camelopardalis: Period Change and Spot Migration  

NASA Astrophysics Data System (ADS)

NR Cam is a short period (P=0.26 days) eclipsing binary of the W UMa type that was relatively recently discovered in the ROTSE1 data of the Northern Sky Variability Survey (NSVS) and was originally listed in the New Catalog of Suspected Variable Stars (NSV) with the identifier NSV 3754. Here we present the first known detailed study of NR Cam, which includes multi-band light curves, color curves, and a photometric orbital solution. NR Cam exhibits a strong O'Connell effect that can be attributed to magnetically induced spot activity on one of the components. Absolute photometry was performed in B and V at the Kutztown University Observatory in 2013 October and November and complementary high precision differential light curves were obtained in BVRI at the same time, as part of the KELT follow-up network, at Brigham Young University's West Mountain Observatory, Swarthmore College's Peter Van de Kamp Observatory, and the University of Louisville's Moore Observatory. After the B-V color curves were used to approximate the stellar surface temperatures and spot locations, the Wilson-Devinney code was employed with a differential corrections routine to determine the most likely stellar properties and orbital parameters. Our solution indicates that the two stars are in contact, sharing a common envelope, and their surface temperatures are approximately 4500 K and 4200 K. The inclination of the orbit was determined to be 68.0 (±0.6) degrees. When compared with the NSVS data, we find that the orbital period of NR Cam has changed over the past decade and that the strength of the O'Connell effect, and the associated spot activity, has also varied significantly.

Shoup, Jenae; Reed, Phillip A.; Joner, Michael D.; Jensen, Eric L. N.; Collins, Karen A; Pepper, Joshua

2014-06-01

400

V344 Lyrae: A Touchtone SU UMa Cataclysmic Variable in the Kepler Field  

NASA Technical Reports Server (NTRS)

We report on the analysis of the Kepler short-cadence (SC) light curve of V344 Lyr obtained during 2009 June 20 through 2010 Mar 19 (Q2-Q4). The system is an SU UMa star showing dwarf nova outbursts and superoutbursts, and promises to be a touchstone for CV studies for the foreseeable future. The system displays both positive and negative super humps with periods of 2.20 and 2.06-hr, respectively, and we identify an orbital period of 2.11-hr. The positive super humps have a maximum amplitude of approximately 0.025-mag, the negative super humps a maximum amplitude of approximately 0.8 mag, and the orbital period at quiescence has an amplitude of approximately 0.025 mag. The quality of the Kepler data is such that we can test vigorously the models for accretion disk dynamics that have been emerging in the past several years. The SC data for V344 Lyr are consistent with the model that two physical sources yield positive superhumps: early in the superoutburst. the superhump signal is generated by viscous dissipation within the periodically flexing disk. but late in the superoutburst, the signal is generated as the accretion stream bright spot sweeps around the rim of the non-axisymmetric disk. The disk super humps are roughly anti-phased with the stream/late superhumps. The V344 Lyr data also reveal negative super humps arising from accretion onto a tilted disk precessing in the retrograde direction, and suggest that negative superhumps may appear during the decline of DN outbursts. The period of negative superhumps has a positive P(raised dot) in between outbursts.

Smale, Alan P.; Wood, Matt A.; Still, Martin D.; Howell, Steve B.; Cannizzo, John K.

2012-01-01

401

THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi  

SciTech Connect

UZ CMi was a W-UMa-type binary star found more than 80 years ago. However, it has been neglected in photometric investigations. Here, the first complete light curves in the B, V, R, and I bands are presented and analyzed using the Wilson and Devinney method. It is discovered that UZ CMi is a contact binary (f = 38.4({+-} 2.3)%) with a mass ratio of 0.45. The derived orbital inclination (i = 87 Degree-Sign ) indicates that it is a total eclipsing binary, which suggests that the determined parameters are reliable. By using 17 new eclipse times together with those collected from the literature, we found that the general trend of the observed-calculated (O - C) curve shows an upward parabolic variation that corresponds to a long-term increase in the orbital period at a rate of P-dot = +4.1 x 10{sup -8} days yr{sup -1}. The continuous increase may be caused by a mass transfer from the less massive component to the more massive one. This suggests that UZ CMi is in the thermal relaxation oscillation controlled stage of the evolutionary scheme proposed by Qian. UZ CMi will oscillate around a critical mass ratio and the contact configuration cannot be broken. After the upward parabolic change was removed, the (O - C){sub 2} curve of the photoelectric and charge-coupled device data revealed a cyclic variation with a small amplitude of 0.0026 days and a period of 21.1 yr. The cyclic change was analyzed for the light-travel time effect via the presence of an extremely cool stellar companion.

Qian, S.-B.; Li, K.; Liao, W.-P.; Liu, L.; Zhu, L.-Y.; He, J.-J.; Wang, J.-J.; Zhao, E.-G., E-mail: qsb@ynao.ac.cn [National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming (China)

2013-04-15

402

BVRI Photometric Analysis of the W UMa Binary, V428, in the field of NGC188  

NASA Astrophysics Data System (ADS)

V428 is a faint 15th magnitude binary observed in a study of the open cluster NGC188. However, its distance from the core of the cluster might exclude its membership. Its light curve was classified as a short period EB type eclipsing binary with a period of 0.3079 d and amplitude of ~0.7 mags in all curves. V428 was observed as a part of our student/professional collaborative studies of interacting binaries from data taken from Dark Sky Observatory of Appalachian State University, North Carolina. The difference in component temperatures is some DT =180 K and its fill-out is 35%. This undoubtedly has a semi-extreme mass ratio (q) otherwise its fill-out might dictate a smaller ?T. A brief, 2.5 year period study gives, as expected, a constant period, P=0.3076789 d. Five times of minimum light were calculated, 3 primary and 2 secondary eclipses from our present observations:HJD I = 2456598.6746±0.0007, 2456599.5990±0.0014, 2456600.8292±0.0013HJD II = 2456598.8299±0.0026, 2456599.7548±0.0025.The improved linear ephemeris is:JD Hel MinI = 2456599.5990(±0.0010) + 0.30767885(±0.00000043)d X E (1)More monitoring is needed to determine its true orbital evolution. The inclination, 80º is not quite enough to produce total eclipses, so a q-search was performed. Our best solution gives a q=0.4. A cool spot was modeled on the primary component to take care of the light curve asymmetries. It is a K-type W UMa contact binary.

Samec, Ronald G.; Maloney, David Edward; Clark, Jeremy; Caton, Daniel B.; Faulkner, Danny R.

2015-01-01

403

Infrasonic harmonic tremor and degassing bursts from Halema'uma'u Crater, Kilauea Volcano, Hawaii  

USGS Publications Warehouse

The formation, evolution, collapse, and subsequent resurrection of a vent within Halema'uma'u Crater, Kilauea Volcano, produced energetic and varied degassing signals recorded by a nearby infrasound array between 2008 and early 2009. After 25 years of quiescence, a vent-clearing explosive burst on 19 March 2008 produced a clear, complex acoustic signal. Near-continuous harmonic infrasonic tremor followed this burst until 4 December 2008, when a period of decreased degassing occurred. The tremor spectra suggest volume oscillation and reverberation of a shallow gas-filled cavity beneath the vent. The dominant tremor peak can be sustained through Helmholtz oscillations of the cavity, while the secondary tremor peak and overtones are interpreted assuming acoustic resonance. The dominant tremor frequency matches the oscillation frequency of the gas emanating from the vent observed by video. Tremor spectra and power are also correlated with cavity geometry and dynamics, with the cavity depth estimated at ~219 m and volume ~3 x 106 m3 in November 2008. Over 21 varied degassing bursts were observed with extended burst durations and frequency content consistent with a transient release of gas exciting the cavity into resonance. Correlation of infrasound with seismicity suggests an open system connecting the atmosphere to the seismic excitation process at depth. Numerous degassing bursts produced very long period (0.03-0.1 Hz) infrasound, the first recorded at Kilauea, indicative of long-duration atmospheric accelerations. Kilauea infrasound appears controlled by the exsolution of gas from the magma, and the interaction of this gas with the conduits and cavities confining it.

Fee, David; Garcés, Milton; Patrick, Matt; Chouet, Bernard; Dawson, Phil; Swanson, Donald A.

2010-01-01

404

Light curve solutions of six eclipsing binaries at the lower limit of periods of the W UMa stars  

E-print Network

Photometric observations in V and I bands of six eclipsing binaries at the lower limit of the orbital periods of W UMa stars are presented. Three of them are newly discovered eclipsing systems. The light curve solutions revealed that all short-period targets were contact or overcontact binaries and added new six binaries to the family of short-period systems with estimated parameters. Four binaries have equal in size components and mass ratio near 1. The phase variability of the V-I colors of all targets may be explained by lower temperatures of their back surfaces than those of their side surfaces. Five systems revealed O'Connell effect that was reproduced by cool spots on the side surfaces of their primary components. The light curves of V1067 Her in 2011 and 2012 were fitted by diametrically opposite spots. The applying of the criteria for subdivision of the W UMa stars to our targets led to ambiguous results.

Kjurkchieva, Diana P; Ibryamov, Sunay I

2015-01-01

405

XMM-Newton observations of three short period polars: V347 Pav, GG Leo and EU UMa  

E-print Network

We present phase-resolved XMM_Newton data of three short period polars: V347 Pav, GG Leo and EU UMa. All three systems show one dominant accretion region which is seen for approximately half of the orbital cycle. GG Leo shows a strong dip feature in its X-ray and UV light curves which is due to absorption of X-rays from the accretion site by the accretion stream. The emission in the case of EU UMa is dominated by soft X-rays: its soft/hard X-ray ratio is amongst the highest seen in these objects. In contrast, GG Leo and V347 Pav shows a ratio consistent with that predicted by the standard shock model. We infer the mass of the white dwarf and explore the affect of restricting the energy range on the derived parameters.

Gavin Ramsay; Mark Cropper; K. O. Mason; F. A. Cordova; W. Priedhorsky

2003-09-03

406

Sesso Temtica: Aplicaes de LiDAR em Florestas Tropicais (LiDAR Applications for Tropical Forests) Coordenadores: Dr. dson Luis Bolfe (Embrapa Monitoramento por Satlite) e Dr. Fernando Esprito-Santo (NASA-JPL)  

E-print Network

Sessão Temática: Aplicações de LiDAR em Florestas Tropicais (LiDAR Applications for Tropical-Santo (NASA-JPL) O sensoriamento remoto advindo de imagens LiDAR fornece informações para análises estruturais. Esta sessão temática visa prover uma visão geral sobre a análise de dados LiDAR aplicados para vários

407

Modelling and design for PM/EM magnetic bearings  

NASA Technical Reports Server (NTRS)

A mathematical model of a permanent magnet/electromagnet (PM/EM) radially active bearing is presented. The bearing is represented by both a reluctance model and a stiffness model. The reluctance model analyzes the magnetic circuit of the PM/EM bearings. By combining the two models, the performance of the bearing can be predicted given geometric dimensions, permanent magnet strength, and the parameters of the EM coils. The overall bearing design including the PM and EM design is subject to the performance requirement and physical constraints. A study of these requirements and constraints is discussed. The PM design is based on the required magnetic flux for proper geometric dimensions and magnet strength. The EM design is based on the stability and force slew rate consideration, and dictates the number of turns for the EM coils and the voltage and current of the power amplifier. An overall PM/EM bearing design methodology is proposed and a case study is also demonstrated.

Pang, D.; Kirk, J. A.; Anand, D. K.; Johnson, R. G.; Zmood, R. B.

1992-01-01

408

Survey of period variations of superhumps in SU UMa-type dwarf novae. V. The fifth year (2012-2013)  

NASA Astrophysics Data System (ADS)

Continuing the project described in Kato et al. (2009, PASJ, 61, S395), we collected times of superhump maxima for SU UMa-type dwarf novae mainly observed during the 2012-2013 season. We found three objects (V444 Peg, CSS J203937, and MASTER J212624) having strongly positive period derivatives despite the long orbital period (Porb). By using the period of growing stage (stage A) superhumps, we obtained mass ratios for six objects. We characterized nine new WZ Sge-type dwarf novae. We made a pilot survey of the decline rate in the slowly fading parts of SU UMa-type and WZ Sge-type outbursts. The decline time scale was found to generally follow an expected P_orb^{1/4} dependence, and WZ Sge-type outbursts also generally follow this trend. There are some objects which show slower decline rates, and we consider these objects good candidates for period bouncers. We also studied unusual behavior in some objects, including BK Lyn which made a transition from an ER UMa-type state to a novalike (standstill) state in 2013, and unusually frequent occurrences of superoutbursts in NY Ser and CR Boo. We applied the least absolute shrinkage and selection operator (Lasso) power spectral analysis, which has been proven to be very effective in analyzing the Kepler data, to the ground-based photometry of BK Lyn, and detected a dramatic disappearance of the signal of negative superhumps in 2013. We suggested that the mass-transfer rates did not strongly vary between the ER UMa-type state and novalike state in BK Lyn, and this transition was less likely caused by a systematic variation of the mass-transfer rate.

Kato, Taichi; Hambsch, Franz-Josef; Maehara, Hiroyuki; Masi, Gianluca; Nocentini, Francesca; Dubovsky, Pavol A.; Kudzej, Igor; Imamura, Kazuyoshi; Ogi, Minako; Tanabe, Kenji; Akazawa, Hidehiko; Krajci, Thomas; Miller, Ian; de Miguel, Enrique; Henden, Arne; Noguchi, Ryo; Ishibashi, Takehiro; Ono, Rikako; Kawabata, Miho; Kobayashi, Hiroshi; Sakai, Daisuke; Nishino, Hirochika; Furukawa, Hisami; Masumoto, Kazunari; Matsumoto, Katsura; Littlefield, Colin; Ohshima, Tomohito; Nakata, Chikako; Honda, Satoshi; Kinugasa, Kenzo; Hashimoto, Osamu; Stein, William; Pickard, Roger D.; Kiyota, Seiichiro; Pavlenko, Elena P.; Antonyuk, Oksana I.; Baklanov, Aleksei V.; Antonyuk, Kirill; Samsonov, Denis; Pit, Nikolaj; Sosnovskij, Aleksei; Oksanen, Arto; Harlingten, Caisey; Tyyskä, Jenni; Monard, Berto; Shugarov, Sergey Yu.; Chochol, Drahomir; Kasai, Kiyoshi; Maeda, Yutaka; Hirosawa, Kenji; Itoh, Hiroshi; Sabo, Richard; Ulowetz, Joseph; Morelle, Etienne; Michel, Raúl; Suárez, Genaro; James, Nick; Dvorak, Shawn; Voloshina, Irina B.; Richmond, Michael; Staels, Bart; Boyd, David; Andreev, Maksim V.; Parakhin, Nikolai; Katysheva, Natalia; Miyashita, Atsushi; Nakajima, Kazuhiro; Bolt, Greg; Padovan, Stefano; Nelson, Peter; Starkey, Donn R.; Buczynski, Denis; Starr, Peter; Goff, William N.; Denisenko, Denis; Kochanek, Christopher S.; Shappee, Benjamin; Stanek, Krzysztof Z.; Prieto, José L.; Itagaki, Koh-ichi; Kaneko, Shizuo; Stubbings, Rod; Muyllaert, Eddy; Shears, Jeremy; Schmeer, Patrick; Poyner, Gary; Rodríguez-Marco, Miguel

2014-04-01

409

ISSN 0103-9741 Monografias em Cincia da Computao  

E-print Network

(cfelicissimo, sardinha, lucena)@inf.puc-rio.br Abstract. Inspired by the Tim Berners-Lee's vision of a Semantic. Inspirado pela visão de Tim Berners-Lee da Web Semântica, este trabalho vi- as apresentar uma aproximação

Endler, Markus

410

RECONHECIMENTO EM TEMPO REAL DE AGENTES AUTNOMOS EM FUTEBOL DE ROBS  

E-print Network

, incluindo um sistema eficiente de classificação de cores. Diversos experimentos são realizados para-los individualmente. O campo tem dimensões de 150cm ¢ 130cm com superfície de cor preta. Uma câmera instalada no centro do campo com altura de 2m transmite imagens dos objetos para o computador. O computador intrepreta

Zhang, Richard "Hao"

411

TandEM: Titan and Enceladus mission  

Microsoft Academic Search

TandEM was proposed as an L-class (large) mission in response to ESA’s Cosmic Vision 2015–2025 Call, and accepted for further\\u000a studies, with the goal of exploring Titan and Enceladus. The mission concept is to perform in situ investigations of two worlds\\u000a tied together by location and properties, whose remarkable natures have been partly revealed by the ongoing Cassini–Huygens\\u000a mission. These

A. Coustenis; S. K. Atreya; T. Balint; R. H. Brown; M. K. Dougherty; F. Ferri; M. Fulchignoni; D. Gautier; R. A. Gowen; C. A. Griffith; L. I. Gurvits; R. Jaumann; Y. Langevin; M. R. Leese; J. I. Lunine; C. P. McKay; X. Moussas; I. Müller-Wodarg; F. Neubauer; T. C. Owen; F. Raulin; E. C. Sittler; F. Sohl; C. Sotin; G. Tobie; T. Tokano; E. P. Turtle; J.-E. Wahlund; J. H. Waite; K. H. Baines; J. Blamont; A. J. Coates; I. Dandouras; T. Krimigis; E. Lellouch; R. D. Lorenz; A. Morse; C. C. Porco; M. Hirtzig; J. Saur; T. Spilker; J. C. Zarnecki; E. Choi; N. Achilleos; R. Amils; P. Annan; D. H. Atkinson; Y. Bénilan; C. Bertucci; B. Bézard; G. L. Bjoraker; M. Blanc; L. Boireau; J. Bouman; M. T. Capria; E. Chassefière; P. Coll; M. Combes; J. F. Cooper; A. Coradini; F. Crary; T. Cravens; I. A. Daglis; E. de Angelis; C. de Bergh; I. de Pater; C. Dunford; G. Durry; O. Dutuit; D. Fairbrother; F. M. Flasar; A. D. Fortes; R. Frampton; M. Fujimoto; M. Galand; O. Grasset; M. Grott; T. Haltigin; A. Herique; F. Hersant; H. Hussmann; W. Ip; R. Johnson; E. Kallio; S. Kempf; M. Knapmeyer; W. Kofman; R. Koop; T. Kostiuk; N. Krupp; M. Küppers; H. Lammer; L.-M. Lara; P. Lavvas; S. Le Mouélic; S. Lebonnois; S. Ledvina; J. Li; T. A. Livengood; R. M. Lopes; J.-J. Lopez-Moreno; D. Luz; P. R. Mahaffy; U. Mall; J. Martinez-Frias; B. Marty; T. McCord; C. Menor Salvan; A. Milillo; D. G. Mitchell; R. Modolo; O. Mousis; M. Nakamura; C. D. Neish; C. A. Nixon; D. Nna Mvondo; G. Orton; M. Paetzold; J. Pitman; S. Pogrebenko; W. Pollard; O. Prieto-Ballesteros; P. Rannou; K. Reh; L. Richter; F. T. Robb; R. Rodrigo; S. Rodriguez; P. Romani; M. Ruiz Bermejo; E. T. Sarris; P. Schenk; B. Schmitt; N. Schmitz; D. Schulze-Makuch; K. Schwingenschuh; A. Selig; B. Sicardy; L. Soderblom; L. J. Spilker; D. Stam; A. Steele; K. Stephan; D. F. Strobel; K. Szego; C. Szopa; R. Thissen; M. G. Tomasko; D. Toublanc; H. Vali; I. Vardavas; V. Vuitton; R. A. West; R. Yelle; E. F. Young

2009-01-01

412

Helicopter EMS: Research Endpoints and Potential Benefits  

PubMed Central

Patients, EMS systems, and healthcare regions benefit from Helicopter EMS (HEMS) utilization. This article discusses these benefits in terms of specific endpoints utilized in research projects. The endpoint of interest, be it primary, secondary, or surrogate, is important to understand in the deployment of HEMS resources or in planning further HEMS outcomes research. The most important outcomes are those which show potential benefits to the patients, such as functional survival, pain relief, and earlier ALS care. Case reports are also important “outcomes” publications. The benefits of HEMS in the rural setting is the ability to provide timely access to Level I or Level II trauma centers and in nontrauma, interfacility transport of cardiac, stroke, and even sepsis patients. Many HEMS crews have pharmacologic and procedural capabilities that bring a different level of care to a trauma scene or small referring hospital, especially in the rural setting. Regional healthcare and EMS system's benefit from HEMS by their capability to extend the advanced level of care throughout a region, provide a “backup” for areas with limited ALS coverage, minimize transport times, make available direct transport to specialized centers, and offer flexibility of transport in overloaded hospital systems. PMID:22203905

Thomas, Stephen H.; Arthur, Annette O.

2012-01-01

413

TandEM: Titan and Enceladus mission  

USGS Publications Warehouse

TandEM was proposed as an L-class (large) mission in response to ESA's Cosmic Vision 2015-2025 Call, and accepted for further studies, with the goal of exploring Titan and Enceladus. The mission concept is to perform in situ investigations of two worlds tied together by location and properties, whose remarkable natures have been partly revealed by the ongoing Cassini-Huygens mission. These bodies still hold mysteries requiring a complete exploration using a variety of vehicles and instruments. TandEM is an ambitious mission because its targets are two of the most exciting and challenging bodies in the Solar System. It is designed to build on but exceed the scientific and technological accomplishments of the Cassini-Huygens mission, exploring Titan and Enceladus in ways that are not currently possible (full close-up and in situ coverage over long periods of time). In the current mission architecture, TandEM proposes to deliver two medium-sized spacecraft to the Saturnian system. One spacecraft would be an orbiter with a large host of instruments which would perform several Enceladus flybys and deliver penetrators to its surface before going into a dedicated orbit around Titan alone, while the other spacecraft would carry the Titan in situ investigation components, i.e. a hot-air balloon (Montgolfi??re) and possibly several landing probes to be delivered through the atmosphere. ?? Springer Science + Business Media B.V. 2008.

Coustenis, A.; Atreya, S.K.; Balint, T.; Brown, R.H.; Dougherty, M.K.; Ferri, F.; Fulchignoni, M.; Gautier, D.; Gowen, R.A.; Griffith, C.A.; Gurvits, L.I.; Jaumann, R.; Langevin, Y.; Leese, M.R.; Lunine, J.I.; McKay, C.P.; Moussas, X.; Muller-Wodarg, I.; Neubauer, F.; Owen, T.C.; Raulin, F.; Sittler, E.C.; Sohl, F.; Sotin, C.; Tobie, G.; Tokano, T.; Turtle, E.P.; Wahlund, J.-E.; Waite, J.H.; Baines, K.H.; Blamont, J.; Coates, A.J.; Dandouras, I.; Krimigis, T.; Lellouch, E.; Lorenz, R.D.; Morse, A.; Porco, C.C.; Hirtzig, M.; Saur, J.; Spilker, T.; Zarnecki, J.C.; Choi, E.; Achilleos, N.; Amils, R.; Annan, P.; Atkinson, D.H.; Benilan, Y.; Bertucci, C.; Bezard, B.; Bjoraker, G.L.; Blanc, M.; Boireau, L.; Bouman, J.; Cabane, M.; Capria, M.T.; Chassefiere, E.; Coll, P.; Combes, M.; Cooper, J.F.; Coradini, A.; Crary, F.; Cravens, T.; Daglis, I.A.; de Angelis, E.; De Bergh, C.; de Pater, I.; Dunford, C.; Durry, G.; Dutuit, O.; Fairbrother, D.; Flasar, F.M.; Fortes, A.D.; Frampton, R.; Fujimoto, M.; Galand, M.; Grasset, O.; Grott, M.; Haltigin, T.; Herique, A.; Hersant, F.; Hussmann, H.; Ip, W.; Johnson, R.; Kallio, E.; Kempf, S.; Knapmeyer, M.; Kofman, W.; Koop, R.; Kostiuk, T.; Krupp, N.; Kuppers, M.; Lammer, H.; Lara, L.-M.; Lavvas, P.; Le, Mouelic S.; Lebonnois, S.; Ledvina, S.; Li, J.; Livengood, T.A.; Lopes, R.M.; Lopez-Moreno, J. -J.; Luz, D.; Mahaffy, P.R.; Mall, U.; Martinez-Frias, J.; Marty, B.; McCord, T.; Salvan, C.M.; Milillo, A.; Mitchell, D.G.; Modolo, R.; Mousis, O.; Nakamura, M.; Neish, C.D.; Nixon, C.A.; Mvondo, D.N.; Orton, G.; Paetzold, M.; Pitman, J.; Pogrebenko, S.; Pollard, W.; Prieto-Ballesteros, O.; Rannou, P.; Reh, K.; Richter, L.; Robb, F.T.; Rodrigo, R.; Rodriguez, S.; Romani, P.; Bermejo, M.R.; Sarris, E.T.; Schenk, P.; Schmitt, B.; Schmitz, N.; Schulze-Makuch, D.; Schwingenschuh, K.; Selig, A.; Sicardy, B.; Soderblom, L.; Spilker, L.J.; Stam, D.; Steele, A.; Stephan, K.; Strobel, D.F.; Szego, K.; Szopa

2009-01-01

414

Gradientes de abundâncias em galáxias espirais  

NASA Astrophysics Data System (ADS)

Gradientes de abundâncias obtidos através de observações de regiões H II têm um papel importante no estudo de formação e evolução de galáxias espirais. Determinações diretas de abundâncias somente são obtidas quando linhas de emissão sensíveis à temperatura eletrônica (e.g., [O III]l4363) são detectadas. Infelizmente estas linhas são fracas ou não observadas em regiões H II de baixa excitação. Nestes casos métodos empíricos são utilizados para estimar as abundâncias químicas. Entretanto, diferentes métodos têm produzido diferentes estimativas de gradientes de abundâncias. Neste trabalho, nós construímos modelos de fotoionização com o objetivo de descrever diagramas de diagnósticos construídos com dados publicados de algumas galáxias espirais normais e barradas. Comparações entre nossas estimativas de abundâncias e de outros métodos mostram que quando não há acordo entre eles, nossos modelos superestimam as abundâncias de O/H e N/H por um fator de 0.3 dex em relação a estimativas diretas de abundâncias, e por fator de 0.2 dex em relação a outros métodos empíricos. A origem da produção de nitrogênio nas galáxias estudadas é discutida.

Dors, O. L.., Jr.; Copetti, M. V. F.

2003-08-01

415

MICORRIZA ARBUSCULAR EM ESPÉCIES ARBÓREAS NATIVAS DA BACIA DO RIO TIBAGI, PARANÁ  

Microsoft Academic Search

RESUMO: Relata-se a incidência da colonização de micorriza arbuscular (MA) e a resposta à inocu- lação em 81 espécies arbóreas nativas da bacia do rio Tibagi (PR), em condições de casa de vegetação. Também é relatada a incidência da colonização de MA em 51 espécies arbóreas nativas coletadas em áreas em início de sucessão arbórea e no interior da floresta

Waldemar Zangaro; Silvio M. A. Nisizaki; Juliana C. B. Domingos; Emilia M. Nakano

416

The Latin Music Database: Uma Base de Dados Para a Classificac~ao Automatica de G^eneros Musicais  

E-print Network

base de dados nova e in´edita, que foi originalmente criada para experimentos relacionados forma a permitir que a base seja utilizada em outros experimentos. Essa quest~ao s´o foi recentemente cient´ifica ao inv´es de terem sem uso limitado a dois ou tr^es experimentos, como normalmente acontece

Kent, University of

417

ESTUDO DE UMA OPERADORA LOGÍSTICA DA CADEIA DO FRIO SITUADA NO NORDESTE BRASILEIRO: O CASO TRU-LOGÍSTICA  

Microsoft Academic Search

A globalização impôs à grande maioria dos mercados, níveis de especialização focados na eficiência como condição indispensável para sobrevivência. O surgimento desse novo cenário trouxe em seu arcabouço a necessidade de sinergia entre todas as áreas existentes na empresa. As áreas de marketing precisavam estar inteiradas da capacidade de vendas no respectivo departamento, que por sua vez, precisavam ter conhecimento

Fabio De Oliveira Medeiros; Luiz Andrea Favero; Lucinaldo De Sousa E Silva; Rejane Andrea Deiga Ferreira

2008-01-01

418

An Effective EMS Hardware and Software Interface- The Trained Operator  

E-print Network

AN EFFECTIVE EMS HARDWARE AND SOFTWARE THE TRAINED OPER~TQR Christene ~. Cherry Johnson Controls Institute INTERFACE Milwaukee, ABSTRAC'l' A computerized Energy Management Sys tem (EMS) is a tool that allows the user to moni tor... and control building heating, ventilation, and air conditioning equip ment (HVAC). All computerized tools require three main components to function effectively: hardware, software, and an interface between the two - the operator. EMS owners recognize...

Cherry, C. L.

419

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM FILOSOFIA  

E-print Network

1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA EDITAL No. 03/20011 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA: CURSO DE MESTRADO ACAD�MICO, PARA INGRESSO NO PRIMEIRO PERÍODO LETIVO DE 2012 PRE�MBULO O Coordenador do Programa de Pós-Graduação em Filosofia, no uso

Lucero, Jorge Carlos

420

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS GRADUAO EM FILOSOFIA  

E-print Network

UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S GRADUA��O EM FILOSOFIA EDITAL Nº 2/2012 SELE��O DE CANDIDATOS AO PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA PARA O CURSO DE MESTRADO ACAD�MICO, PARA O PRIMEIRO PERIODO LETIVO DE 2013 1. PRE�MBULO 1.1 O Coordenador do Programa de Pós-Graduação em Filosofia, no uso de

Maier, Rudolf Richard

421

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM FILOSOFIA  

E-print Network

UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA EDITAL Nº 1/2012 SELE��O DE CANDIDATOS AO PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA PARA O CURSO DE MESTRADO ACAD�MICO, PARA INGRESSO NO SEGUNDO SEMESTRE LETIVO DE 2012 1. PRE�MBULO 1.1 O Coordenador do Programa de Pós-Graduação em Filosofia

Maier, Rudolf Richard

422

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM FILOSOFIA  

E-print Network

UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA EDITAL No. 02/2010 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA PARA OS CURSOS DE MESTRADO ACAD�MICO PARA O PRIMEIRO SEMESTRE LETIVO DE 2011 PRE�MBULO O Coordenador do Programa de Pós-Graduação em Filosofia, no uso

Maier, Rudolf Richard

423

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM FILOSOFIA  

E-print Network

1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA EDITAL No. 02/20011 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM FILOSOFIA: CURSO DE MESTRADO ACAD�MICO, PARA INGRESSO NO PRIMEIRO PERÍODO LETIVO DE 2012 PRE�MBULO O Coordenador do Programa de Pós-Graduação em Filosofia, no uso

Lucero, Jorge Carlos

424

77 FR 4225 - Oral Dosage Form New Animal Drugs; Milbemycin Oxime, Lufenuron, and Praziquantel  

Federal Register 2010, 2011, 2012, 2013, 2014

...approval of a new animal drug application (NADA) filed by Novartis Animal Health US, Inc. The NADA provides for the veterinary prescription use...Suite 300, Greensboro, NC 27408, filed NADA 141-333 that provides for the...

2012-01-27

425

77 FR 47511 - New Animal Drugs; Cephalexin; Fentanyl; Milbemycin Oxime and Praziquantel  

Federal Register 2010, 2011, 2012, 2013, 2014

...bacterial pyoderma in dogs caused by susceptible strains of Staphylococcus pseudintermedius. 141-337............ Nexcyon...bacterial pyoderma in dogs caused by susceptible strains of Staphylococcus pseudintermedius. (iii) Limitations. Federal law...

2012-08-09

426

2. HI PAR (ACQUISITION RADAR) TOWER AND ENLISTED MEN (EM) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. HI PAR (ACQUISITION RADAR) TOWER AND ENLISTED MEN (EM) BARRACKS WITH RADAR ATTACHED. - Nike Hercules Missile Battery Summit Site, Battery Control Administration & Barracks Building, Anchorage, Anchorage, AK

427

Survey of period variations of superhumps in SU UMa-type dwarf novae. VI. The sixth year (2013-2014)  

NASA Astrophysics Data System (ADS)

Continuing the project undertaken by Kato et al. (2009), we collected times of superhump maxima for 56 SU UMa-type dwarf novae mainly observed during the 2013-2014 season and characterized these objects. We detected negative superhumps in VW Hyi and indicated that the low number of normal outbursts in some supercycles can be interpreted as a result of disk tilt. This finding, combined with the Kepler observation of V1504 Cyg and V344 Lyr, suggests that disk tilt is responsible for modulating the outburst pattern in SU UMa-type dwarf novae. We also studied the deeply eclipsing WZ Sge-type dwarf nova MASTER OT J005740.99+443101.5 and found evidence of a sharp eclipse during the phase of early superhumps. The profile can be reproduced by a combination of the eclipse of the axisymmetric disk and the uneclipsed light source of early superhumps. This finding shows the lack of evidence for a greatly enhanced hot spot during the early stage of WZ Sge-type outburst. We detected growing (stage A) superhumps in MN Dra and give a suggestion that some of SU UMa-type dwarf novae situated near the critical condition of tidal instability may show long-lasting stage A superhumps. The large negative period derivatives reported in such systems can be understood as a result of the combination of stage A and B superhumps. Two WZ Sge-type dwarf novae, AL Com and ASASSN-13ck, showed a long-lasting (plateau-type) rebrightening. In the early phase of their rebrightenings, both objects showed a precursor-like outburst, suggesting that the long-lasting rebrightening is triggered by a precursor outburst.

Kato, Taichi; Dubovsky, Pavol A.; Kudzej, Igor; Hambsch, Franz-Josef; Miller, Ian; Ohshima, Tomohito; Nakata, Chikako; Kawabata, Miho; Nishino, Hirochika; Masumoto, Kazunari; Mizoguchi, Sahori; Yamanaka, Masayuki; Matsumoto, Katsura; Sakai, Daisuke; Fukushima, Daiki; Matsuura, Minami; Bouno, Genki; Takenaka, Megumi; Nakagawa, Shinichi; Noguchi, Ryo; Iino, Eriko; Pickard, Roger D.; Maeda, Yutaka; Henden, Arne; Kasai, Kiyoshi; Kiyota, Seiichiro; Akazawa, Hidehiko; Imamura, Kazuyoshi; de Miguel, Enrique; Maehara, Hiroyuki; Monard, Berto; Pavlenko, Elena P.; Antonyuk, Kirill; Pit, Nikolaj; Antonyuk, Oksana I.; Baklanov, Aleksei V.; Ruiz, Javier; Richmond, Michael; Oksanen, Arto; Harlingten, Caisey; Shugarov, Sergey Yu.; Chochol, Drahomir; Masi, Gianluca; Nocentini, Francesca; Schmeer, Patrick; Bolt, Greg; Nelson, Peter; Ulowetz, Joseph; Sabo, Richard; Goff, William N.; Stein, William; Michel, Raúl; Dvorak, Shawn; Voloshina, Irina B.; Metlov, Vladimir; Katysheva, Natalia; Neustroev, Vitaly V.; Sjoberg, George; Littlefield, Colin; D?bski, Bart?omiej; Sowicka, Paulina; Klimaszewski, Marcin; Cury?o, Ma?gorzata; Morelle, Etienne; Curtis, Ivan A.; Iwamatsu, Hidetoshi; Butterworth, Neil D.; Andreev, Maksim V.; Parakhin, Nikolai; Sklyanov, Aleksandr; Shiokawa, Kazuhiko; Novák, Rudolf; Irsmambetova, Tat'yana R.; Itoh, Hiroshi; Ito, Yoshiharu; Hirosawa, Kenji; Denisenko, Denis; Kochanek, Christopher S.; Shappee, Benjamin; Stanek, Krzysztof Z.; Prieto, José L.; Itagaki, Koh-ichi; Stubbings, Rod; Ripero, Jose; Muyllaert, Eddy; Poyner, Gary

2014-10-01

428

Time Sequence Spectroscopy of AW UMa. The 518 nm Mg i Triplet Region Analyzed With Broadening Functions  

NASA Astrophysics Data System (ADS)

High-resolution spectroscopic observations of AW UMa, obtained on three consecutive nights with a median time resolution of 2.1 minutes, have been analyzed using the broadening function method in the spectral window of 22.75 nm around the 518 nm Mg i triplet region. Doppler images of the system reveal the presence of vigorous mass motions within the binary system; their presence puts into question the solid-body rotation assumption of the contact binary model. AW UMa appears to be a very tight, semi-detached binary; the mass transfer takes place from the more massive to the less massive component. The primary, a fast-rotating star with Vsin i=181.4+/- 2.5 km s-1, is covered with inhomogeneities: very slowly drifting spots and a dense network of ripples more closely participating in its rotation. The spectral lines of the primary show an additional broadening component (called the “pedestal”) that originates either in the equatorial regions, which rotate faster than the rest of the star by about 50 km s-1, or in an external disk-like structure. The secondary component appears to be smaller than predicted by the contact model. The radial velocity field around the secondary is dominated by accretion of matter transferred from (and possibly partly returned to) the primary component. The parameters of the binary are Asin i=2.73+/- 0.11 {{R}? } and {{M}1}{{sin }3}i=1.29+/- 0.15 {{M}? }, {{M}2}{{sin }3}i=0.128+/- 0.016 {{M}? }. The mass ratio, {{q}sp}={{M}2}/{{M}1}=0.099+/- 0.003, while still the most uncertain among the spectroscopic elements, is substantially different from the previous numerous and mutually consistent photometric investigations which were based on the contact model. It should be studied why photometry and spectroscopy give such discrepant results and whether AW UMa is an unusual object or if only very high-quality spectroscopy can reveal the true nature of W UMa-type binaries. Based on observations obtained at the Canada-France-Hawaii Telescope (CFHT), which is operated by the National Research Council of Canada, the Institut National des Sciences de l'Univers of the Centre National de la Recherche Scientique of France, and the University of Hawaii.

Rucinski, Slavek M.

2015-02-01

429

Recruitment and retention in rural and urban EMS: results from a national survey of local EMS directors.  

PubMed

Maintaining an adequate staff is a challenge for rural emergency medical services (EMS) providers. This national survey of local EMS directors finds that rural EMS are more likely to be freestanding, that is, not affiliated with other public services, to employ only emergency medical technician-basics (EMT-Bs), and to be all volunteer. Rural EMS directors are more likely than urban ones to report that they are not currently fully staffed. The most common barriers to recruitment of EMTs in both urban and rural areas include unwillingness of community members to volunteer and lack of certified EMTs in the area. In rural areas, barriers to EMT training were noted more often than in urban areas as was the lack of employer support for employee volunteers. Similar rural training barriers affected retention of staff. Rural respondents reported that they lose staff to burnout and to difficulty in meeting continuing education requirements. Among rural respondents, those who direct all-volunteer EMS were the most likely to report recruitment and retention problems. The results suggest areas for further study including how volunteer EMS agencies can transition to paid agencies, how to bring EMS education to rural areas, and how EMS can work with other agencies to ensure EMS viability. PMID:19363405

Freeman, Victoria A; Slifkin, Rebecca T; Patterson, P Daniel

2009-01-01

430

Marine EM Reference Database http://marineemlab.ucsd.edu/~kkey/MarineEM  

E-print Network

to document the peer-reviewed published papers that cover any aspect of marine electromagnetic induction. Techniques and instrumentation for study of natu- ral electromagnetic induction at sea. Physics Of The Earth. I started this database as part of a review paper that was presented at the 20th EM Induction

Key, Kerry

431

Marine EM Reference Database http://marineemlab.ucsd.edu/~kkey/MarineEM  

E-print Network

to document the peer-reviewed published papers that cover any aspect of marine electromagnetic induction. I started this database as part of a review paper that was presented at the 20th EM Induction), Marine Electromagnetic Studies of Seafloor Resources and Tec- tonics, Surveys in Geophysics. http

Key, Kerry

432

AVALIAÇÃO DA PRESENÇA DE ENDOSSIMBIONTES Cardinium em DIFERENTES ESPÉCIES DE ARTRÓPODES.  

Technology Transfer Automated Retrieval System (TEKTRAN)

A presença de endossimbiontes do gênero Cardinium em alguns grupos de artrópodes foi recentemente relatada e relacionada com diversas alterações reprodutivas em seus hospedeiros, tais como feminilização de ácaros, partenogênese em parasitóides, incompatibilidade citoplasmática e aumento da fecundida...

433

EM threat analysis for wireless systems.  

SciTech Connect

Modern digital radio systems are complex and must be carefully designed, especially when expected to operate in harsh propagation environments. The ability to accurately predict the effects of propagation on wireless radio performance could lead to more efficient radio designs as well as the ability to perform vulnerability analyses before and after system deployment. In this report, the authors--experts in electromagnetic (EM) modeling and wireless communication theory--describe the construction of a simulation environment that is capable of quantifying the effects of wireless propagation on the performance of digital communication.

Burkholder, R. J. (Ohio State University Electroscience Laboratory); Mariano, Robert J.; Schniter, P. (Ohio State University Electroscience Laboratory); Gupta, I. J. (Ohio State University Electroscience Laboratory)

2006-06-01

434

Communication - An Effective Tool for Implementing ISO 14001/EMS  

SciTech Connect

The Idaho National Engineering and Environmental Laboratory (INEEL) received ISO 14001/EMS certification in June 2002. Communication played an effective role in implementing ISO 14001/EMS at the INEEL. This paper describes communication strategies used during the implementation and certification processes. The INEEL achieved Integrated Safety Management System (ISMS) and Voluntary Protection Program (VPP) Star status in 2001. ISMS implemented a formal process to plan and execute work. VPP facilitated worker involvement by establishing geographic units at various facilities with employee points of contact and management champions. The INEEL Environmental Management System (EMS) was developed to integrate the environmental functional area into its ISMS and VPP. Since the core functions of ISMS, VPP, and EMS are interchangeable, they were easy to integrate. Communication is essential to successfully implement an EMS. (According to ISO 14001 requirements, communication interacts with 12 other elements of the requirements.) We developed communication strategies that integrated ISMS, VPP, and EMS. For example, the ISMS, VPP, and EMS Web sites communicated messages to the work force, such as “VPP emphasizes the people side of doing business, ISMS emphasizes the system side of doing business, and EMS emphasizes the systems to protect the environment; but they all define work, identify and analyze hazards, and mitigate the hazards.” As a result of this integration, the work force supported and implemented the EMS. In addition, the INEEL established a cross-functional communication team to assist with implementing the EMS. The team included members from the Training and Communication organizations, VPP office, Pollution Prevention, Employee and Media Relations, a union representative, facility environmental support, and EMS staff. This crossfunctional team used various communication strategies to promote our EMS to all organization levels and successfully implemented EMS activities through VPP geographic units. In summary, the ISMS and VPP process at the INEEL provided the basic framework of management support and worker involvement to implement our EMS. A cross-functional communication team was established to facilitate the implementation with great success. Communication has been an effective tool for implementing an ISO 14001/EMS at the INEEL.

Rachel Damewood; Bowen Huntsman

2004-04-01

435

Comparing the Precision 2009 and 2012 Light Curves of the Precontact W Uma Binary V1001 Cassiopeia  

NASA Astrophysics Data System (ADS)

A 2012 follow up to the analysis of 2009 observations is presented for the very short period (˜0.43 days) precontact W UMa binary (PCWB) V1001 Cassiopeia. Its short period, similar to the majority of W UMa binaries, and its distinct EA light curve make it a very rare and interesting system for continuing photometric investigation. Previous photometric VRI standard magnitudes give a K4 spectral type. Our solutions of light curves separated by some three years give approximately the same physical parameters. However, the spots have radically changed in temperature, area, and position. While only one dark spot was used to model the first curves, two hot spots are now needed. This affects the overall shape of the light curve, especially in the secondary eclipses in B and V. Additional eclipse timings now show that the orbital period is changing. We conclude that spots are very active on this solar-type dwarf system and that it may mimic its larger cousins, the RS CVn binaries. The conclusion is that analysis now needs to be directed at the continuous time evolution of PCWBs.

Samec, R. G.; Koenke, S. S.; Faulkner, D. R.

2015-01-01

436

EM algorithm for sparse representation-based image inpainting  

Microsoft Academic Search

We introduce an expectation-maximization (EM) algorithm for image inpainting based on a penalized likelihood formulated using linear sparse representations. Taking advantage of the sparsity of representations, a regularization through a prior penalty is imposed on the reconstructed coefficients. From a statistical point of view, the inpainting can be viewed as an estimation problem with missing data. The EM framework is

Mohamed-jalal Fadili; Jean-luc Starck

2005-01-01

437

MESTRADO EM MICROBIOLOGIA BIOLOGIA ESTRUTURAL Instituto Superior Tcnico  

E-print Network

MESTRADO EM MICROBIOLOGIA BIOLOGIA ESTRUTURAL ­ Instituto Superior Técnico Objectivos: Introduzir e/ou aprofundar técnicas avançadas de Análise Estrutural relevantes em Biologia e sua aplicação na elucidação de

Instituto de Sistemas e Robotica

438

ELEKTRA: Um Chatterbot para Uso em Ambiente Educacional  

Microsoft Academic Search

**** Resumo. A E ducação à Distância vem despertando muito interesse de pesquisadores de diversas áreas. Por isso, também vem sendo muito a bordada em congressos, workshops e seminários. Muito se discute sobre a união entre tecnologia e educação visando complementar a formação de estudantes. Com a pesquisa em Inteligência Artificial, surgiram os chatterbots. Chatterbots são programas destinados a demonstrar

Michelle Denise Leonhardt; Daiane Dorneles de Castro; Liane Margarida; Rockenbach Tarouco

2003-01-01

439

APLICAÇÃO DO CONVERSOR ZETA EM fONTES CHAVEADAS  

Microsoft Academic Search

RESUMO Pretende-se neste artigo estudar em regime permanente o desempenho do conversor ZETA em modo de operação contínuo. Este conversor é derivado do conversor Forward pela substituição do diodo retificador por um capacitor de acoplamento. Ábacos serão gerados para auxiliar no projeto da estrutura de potência. Os estudos teóricos são confirmados por simulação. São apresentados resultados experimentais obtidos a partir

Denizar Cruz Martins; Glaucio Nascimento de Abreu; Ivo Barbi

440

SALA DE AULA VIRTUAL EM INSTITUIÇÃO DE INTERNAÇÃO 1  

Microsoft Academic Search

Resumo: Este texto apresenta três interfaces de estudo: instituição disciplinar\\/ sociedade de controle, tecnologia da comunicação e da informação e educomunicação partir de um objeto de pesquisa: Sala de Aula Virtual em Instituição de Internação de Adolescente em conflito com a lei sob o regime de internação. Busca compreender a natureza da instituição e sua relação com o poder disciplinar,

JANAINA ABDALLA

2002-01-01

441

Using EM for Reinforcement Learning Peter Dayan Geoffrey E Hinton  

E-print Network

return, even though it can make large changes in the values of the parameters. The proof is based­maximization (EM) algorithm (Baum, Petrie, Soules & Weiss, 1970; Dempster, Laird & Rubin, 1977) and, as with EM . Our proof demonstrates that the RPP is well­founded. 2 Theory The RPP operates to improve

Hinton, Geoffrey E.

442

Dirio Econmico -Universidades Como ser investigador em Portugal  

E-print Network

Diário Económico - Universidades Como é ser investigador em Portugal Autor: N.D. Editora: ST e SF - Universidades Como é ser investigador em Portugal Autor: N.D. Editora: ST e SF Id: 1646658 Data Publicação: 19

Instituto de Sistemas e Robotica

443

International EMS systems in South Africa: past, present, and future  

Microsoft Academic Search

Emergency medical services (EMS) in South Africa have developed rapidly over the last 20 years. However, there is inequitable distribution of services, with many rural areas being poorly resourced. This is partly as a result of the historical inequalities prevalent in the South African society of the past; efforts are being made to address this. EMS training is provided at

Campbell MacFarlane; Charl van Loggerenberg; Walter Kloeck

2005-01-01

444

RFID-based flexible low-cost EM field probe  

Microsoft Academic Search

The capability of the RFID tags as a low cost flexible device to measure the EM complex field distribution has been presented and some preliminary results presented. The devices do not need any kind of electrical connexion giving them a high versatility to act as a remote EM probing device under different conditions of positioning and accessibility. Sensitivity and dynamic

S. Capdevila; R. Serrano; A. Aguasca; S. Blanch; J. Romeu; L. Jofre

2008-01-01

445

Recent development in open systems for EMS\\/SCADA  

Microsoft Academic Search

Based on the current situation and emerging trends of development of EMS\\/SCADA systems throughout the world, this report examines the `open system' concept from the viewpoints of users and suppliers. Current technologies for open distributed EMS\\/SCADAs and their possible future trends are described.

Yutaka Kokai; Fumio Masuda; Satoshi Horiike; Yasuji Sekine

1998-01-01

446

A European Land Mobile Satellite System via EMS  

NASA Astrophysics Data System (ADS)

The paper analyzes the technical and market issues that influence the strategy of implementation of a Land Mobile Satellite System via the payload EMS (European Mobile System) embarked on ITALSAT F-2. The final goal is to determine services, network architecture, and added value chain that make LMSS via EMS profitable for a typical telecommunication company.

Ananasso, Fulvio; Mistretta, Ignazio

1991-10-01

447

The EM Algorithm and the Rise of Computational Biology  

Microsoft Academic Search

In the past decade, computational biology has grown from a cottage industry with a handful of researchers to an attractive in- terdisciplinary eld, catching the attention and imagination of many quantitatively-minded scientists. Of interest to us is the key role played by the EM algorithm during this transformation. We survey the use of the EM algorithm in a few important

Xiaodan Fan; Yuan Yuan; Jun S. Liu

2009-01-01

448

The EM Algorithm and the Rise of Computational Biology  

Microsoft Academic Search

In the past decade computational biology has grown from a cottage industry with a handful of researchers to an attractive interdisciplinary field, catching the attention and imagination of many quantitatively-minded scientists. Of interest to us is the key role played by the EM algorithm during this transformation. We survey the use of the EM algorithm in a few important computational

Xiaodan Fan; Yuan Yuan; Jun S. Liu

2011-01-01

449

EMS control chosen instead of refrigeration, HVAC upgrade  

Microsoft Academic Search

A Wisconsin supermarket decided on the basis of costs to install an energy management system (EMS) to improve the store's energy efficiency rather than invest in new refrigerating equipment at this time. When the next remodeling occurs in two years, the store will purchase new equipment using energy savings from the EMS to help defray the costs. The store selected

1984-01-01

450

DOE EM industry programs robotics development  

SciTech Connect

The Office of Science and Technology (OST) manages an aggressive program for RD&D, as well as testing and evaluation for the U.S. Department of Energy`s (DOE) Environmental Management (EM) organization. The goal is to develop new and improved environmental restoration and waste management technologies to clean up the inventory of the DOE weapons complex faster, safer, and cheaper than is possible with currently available technologies. OST has organized technology management activities along focus teams for each major problem area. There are currently five focus areas: decontamination and decommissioning, tanks, subsurface contaminants, mixed waste, and plutonium. In addition, OST is pursuing research and development (R&D) that cuts across these focus areas by having applications in two or more focus areas. Currently, there are three cross-cutting programs: the robotics technology development; characterization, monitoring, and sensor technologies; and efficient separations and processing.

Staubly, R.; Kothari, V. [Dept. of Energy, Morgantown, WV (United States)

1997-12-01

451

Evaluation of Fracture Azimuth by EM Wave and Elastic Wave  

NASA Astrophysics Data System (ADS)

Fracture system plays an important role in the development of underground energy, for example enhanced geothermal system (EGS), oil shale and shale gas, etc. Therefore, it becomes more and more important to detect and evaluate the fracture system. Geophysical prospecting is an useful method to evaluate the characteristics of the subsurface fractures. Currently, micro-seismology, multi-wave seismic exploration, and electromagnetic (EM) survey are reported to be used for the purpose. We are studying a method using both elastic wave and EM wave to detect and evaluate the fracture azimuth in laboratory. First, we build a 3D horizontal transverse isotropy (HTI) model, shown in the figure 1, by dry parallel fractures system, which was constructed by plexiglass plates and papers. Then, we used the ultrasonic system to obtain reflected S-wave data. Depending on the shear wave splitting, we evaluated the fracture azimuth by the algorithm of Pearson correlation coefficient. In addition, we used the full Polarimetric ultra wide band electromagnetic (FP-UWB-EM) wave System, shown in the figure 2, to obtain full polarimetric reflected EM-wave data. Depending on the rotation of the EM wave polarimetry, we evaluated the fracture azimuth by the the ration between maximum amplitude of co-polarimetric EM wave and maximum amplitude of cross-polarimetric EM wave. Finally, we used both EM-wave data and S-wave data to evaluate the fracture azimuth by the method of cross plot and statistical mathematics. To sum up, we found that FP-UWB-EM wave can be used to evaluated the fracture azimuth and is more accurate than ultrasound wave. Also joint evaluation using both data could improve the precision.

Feng, X.; Wang, Q.; Liu, C.; Lu, Q.; Zeng, Z.; Liang, W.; Yu, Y.; Ren, Q.

2013-12-01

452

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM COMUNICAO  

E-print Network

Experiência profissional em comunicação 5 Produção científica na área de comunicação (artigos, livros e capítulos) 10 Produção científica em outras áreas de conhecimento (artigos, livros e capítulos) 5 (artigos, livros e 10 #12;3 capítulos) Produção científica em outras áreas de conhecimento (artigos, livros

Maier, Rudolf Richard

453

EMS control chosen instead of refrigeration, HVAC upgrade  

SciTech Connect

A Wisconsin supermarket decided on the basis of costs to install an energy management system (EMS) to improve the store's energy efficiency rather than invest in new refrigerating equipment at this time. When the next remodeling occurs in two years, the store will purchase new equipment using energy savings from the EMS to help defray the costs. The store selected an EMS with distributed processing that can expand to control new equipment. It expects a 22% drop in energy bills and a two-year payback of the $50,000 investment. Details of the system's functions describe some of the 53 control points.

Watson, F.

1984-05-07

454

REGIMENTO DO CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, REA DE CONCENTRAO  

E-print Network

REGIMENTO DO CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, ÁREA DE CONCENTRAÇÂO EM Espacial e Controle (CMC) do Curso de Pós-graduação em Engenharia e Tecnologia Espaciais (ETE) objetiva Conselho de Pós-Graduação, pelo Regimento do Curso de Pós-Graduação em Engenharia e Tecnologia Espaciais e

455

REGIMENTO DO CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, REA DE  

E-print Network

REGIMENTO DO CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, ÁREA DE CONCENTRAÇÃO EM Espacial e Controle (CMC) do Curso de Pós-graduação em Engenharia e Tecnologia Espaciais (ETE) objetiva de Pós-Graduação, pelo Regimento do Curso de Pós- Graduação em Engenharia e Tecnologia Espaciais e

456

REGIMENTO DO CURSO DE PS-GRADUAO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, REA DE  

E-print Network

REGIMENTO DO CURSO DE PÓS-GRADUAÇÃO EM ENGENHARIA E TECNOLOGIA ESPACIAIS, ÁREA DE CONCENTRAÇÂO EM Espacial e Controle (CMC) do Curso de Pós-graduação em Engenharia e Tecnologia Espaciais (ETE) objetiva de Pós-Graduação, pelo Regimento do Curso de Pós- Graduação em Engenharia e Tecnologia Espaciais e

457

ESTUDO DA ESTRUTURA TURBULENTA EM TANQUES DE GRELHAS OSCILANTES  

Microsoft Academic Search

Resumo- Este trabalho representa o início de uma série de pesquisas que visam o estudo da turbulência e de sua relação com as trocas gasosas entre ar e água, através de experimentos com grelhas oscilantes. O objetivo do trabalho é mostrar o projeto e a construção de um tanque de grelha oscilante. Medidas de velocidade turbulenta foram realizados com uso

Leonardo Barra; Santana de Souza; Johannes Gérson Janzen; Harry Edmar Schulz

458

ANO XVI -EDIO 123 -ABRIL DE 2014 Ato em Joinville  

E-print Network

nossas lutas para promover as mu- danças necessárias. Nesta edição do Jornal Circulação você confe- re o participando das lutas para que todos nós possamos construir um país melhor e uma sociedade mais justa valo

Floeter, Sergio Ricardo

459

Environmental Education and Development Division (EM-522). Annual report, Fiscal year 1993  

SciTech Connect

The Environmental Education and Development Division (EM-522) is one of three divisions within the Office of Technology Integration and Environmental Education and Development (EM-52) in Environmental Restoration and Waste Management`s (EM`s) Office of Technology Development (EM-50). The primary design criterion for EM-522 education activities is directly related to meeting EM`s goal of environmental compliance on an accelerated basis and cleanup of the 1989 inventory of inactive sites and facilities by the year 2019. Therefore, EM-522`s efforts are directed specifically toward stimulating knowledge and capabilities to achieve the goals of EM while contributing to DOE`s overall goal of increasing scientific, mathematical, and technical literacy and competency. This report discusses fiscal year 1993 activities.

Not Available

1993-12-31

460

MESTRADO EM MICROBIOLOGIA BIOTECNOLOGIA AMBIENTAL Instituto Superior Tcnico  

E-print Network

MESTRADO EM MICROBIOLOGIA BIOTECNOLOGIA AMBIENTAL ­ Instituto Superior Técnico Objectivos: Na risco ambiental), e sobre a aplicação de métodos da biotecnologia na resolução de problemas ambientais, desde a monitorização dos poluentes no Ambiente até à biorremediação nos compartimentos ambientais

Instituto de Sistemas e Robotica

461

E.M. and Hadronic Shower Simulation with FLUKA  

SciTech Connect

A description of the main features of e.m. and hadronic shower simulation models used in the FLUKA code is summarized and some recent applications are discussed. The general status of the FLUKA project is also reported.

Battistoni, G.; Fasso, A.; Ferrari, A.; Ranft, J.; Rubbia, A.; Sala, P.R.; /INFN, Milan /SLAC /CERN /Siegen U. /Zurich, ETH

2005-10-03

462

Comparison of different marine EM methods for reservoir monitoring  

NASA Astrophysics Data System (ADS)

Recent studies have inferred the feasibility of controlled-source electromagnetic (CSEM) methods for the monitoring of offshore oil and gas fields. These studies have focused on CSEM methods where a transmitter is towed above an array of seafloor receivers. Recently, a towed streamer EM system capable to simultaneous seismic and CSEM data acquisition has been developed and tested in the North Sea. In this paper, we use 3D modeling and inversion to compare conventional CSEM with towed EM for monitoring of the Harding field, which is representative of a typical North Sea target. The 3D model of the Harding field itself was constructed from dynamic reservoir simulations. We observe similarities in the recovered models, suggesting that the towed streamer EM system could be used for reservoir monitoring. Obviating the need for ocean bottom receivers, the towed-streamer EM system enables CSEM data to be acquired simultaneously with seismic for higher production rates and relatively lower cost than conventional CSEM.

ENDO, M.; Black, N.; Wilson, G. A.; Zhdanov, M. S.

2011-12-01

463

EM 1110-2-2100 1 December 2005  

E-print Network

-3 Shear Strength Tests..................................................................... 2-8 2-3 Selection of Design Shear Strengths............................................. 2-9 2-5 Multiple Wedge Bearing Capacity........................................................... 3-10 3-6 #12;EM 1110-2-2100 1

US Army Corps of Engineers

464

Nobel da Medicina em debate sobre a importncia da cincia  

E-print Network

Nobel da Medicina em debate sobre a importância da ciência lisboa O Nobel da Medicina e atual presidente da Royal Society (a congénere britânica da Acade- mia das Ciências) , Paul Nurse, está hoje em Lisboa para falar de ciên- cia e da forma como ela pode ser eficaz e imprescindível nas socie- dades

Instituto de Sistemas e Robotica

465

Decentralized autonomous object-oriented EMS\\/SCADA system  

Microsoft Academic Search

Energy management systems\\/supervisory control and data acquisition (EMS\\/SCADA) systems are usually geographically distributed and have operational organizations. They are changing in accordance with the various and varying environments, and they should be flexible enough to adapt to those changes quickly. The paper proposes a new architecture called SCOPE (System Configuration of Power Control System) to realize flexible and reliable EMS\\/SCADA

Toshibumi. Seki; H. Sato; T. Tanaka; H. Watanabe

1997-01-01

466

NASA EM Followup of LIGO-Virgo Candidate Events  

NASA Technical Reports Server (NTRS)

We present a strategy for a follow-up of LIGO-Virgo candidate events using offline survey data from several NASA high-energy photon instruments aboard RXTE, Swift, and Fermi. Time and sky-location information provided by the GW trigger allows for a targeted search for prompt and afterglow EM signals. In doing so, we expect to be sensitive to signals which are too weak to be publicly reported as astrophysical EM events.

Blackburn, Lindy L.

2011-01-01

467

Maximum likelihood noise cancellation using the EM algorithm  

Microsoft Academic Search

An approach to the two-microphone speech enhancement problem is discussed. Specifically, a maximum-likelihood (ML) problem is formulated for estimating the parameters needed for canceling the noise, and solved by the iterative EM (estimate-maximize) technique. The EM algorithm has been implemented for both a simplified and a more general scenario. The results improve upon those obtained with the classical least-squares approach

MEIR FEDER; ALAN V. OPPENHEIM; EHUD WEINSTEIN

1989-01-01

468

Waste fuel, EMS may save plant $1M yearly  

Microsoft Academic Search

A mixture of paper trash and coal ash fueling an Erie, Pa. General Electric plant and a Network 90 microprocessor-based energy-management system (EMS) to optimize boiler efficiency will cost about $3 million and have a three-to-four-year payback. Over half the savings will come from the avoided costs of burning plant-generated trash. The EMS system will monitor fuel requirements in the

Barber

1982-01-01

469

Uma experiência educacional de incentivo ao aleitamento materno e estimulação do bebê, para mães de nível sócio-econômico baixo: estudo preliminar  

Microsoft Academic Search

Resumo Este estudo efetuou uma avaliação preliminar da eficácia de um programa educacio- nal de estímulo ao aleitamento materno, que inclui a introdução simultânea de técnicas de esti- mulação do bebê. O programa, elaborado por Garcia-Montrone (1992), foi aplicado a um grupo de mães de nível sócio-econômico baixo (grupo experimental). Tal programa foi avaliado atra- vés de sessões de observação

Victoria Garcia-Montrone; Júlio C. de Rose

1996-01-01

470

Ultraviolet spectral behavior of IP Peg and DW UMa in high, intermediate and low states from the HST and IUE satellites  

NASA Astrophysics Data System (ADS)

Ultraviolet spectra of IP Peg and DW UMa observed with Hubble Space Telescope Space Telescope Imaging Spectrograph & Faint Object Spectrograph (HST STIS FOS) and International Ultraviolet Explorer (IUE) satellites were analyzed during the period between 1989-1994 and 1985-2004. Different profiles of two systems showing variations of line fluxes at different orbital phases are presented. Both IP Peg and DW UMa are characterized by emission lines in high, intermediate and low states. DW UMa is characterized by absorption lines in an unusual low state. This paper focuses on the C IV emission line at 1550 Å produced in an accretion disk for two systems (Saito et al., 2005; Knigge et al., 2000), by calculating spectral line fluxes. Our results show that there are significant variations of line fluxes with time for two systems. The variations of line fluxes are attributed to the variations of both density and temperature as a result of a changing rate of mass transfer from the secondary star to the white dwarf (Saito et al., 2005; Knigge et al., 2000). These results from the IUE and HST observations support a white dwarf model atmospheres of IP Peg and DW UMa producing sufficient UV flux for orbital modulations.

Sanad, M. R.

2014-02-01

471

Optimization of ultrasonic/microwave assisted extraction (UMAE) of polysaccharides from Inonotus obliquus and evaluation of its anti-tumor activities.  

PubMed

Recently, the use of ultrasonic and microwave has attracted considerable interest as an alternative approach to the traditional extraction methods. In this paper, in order to maximize the yield and purity of polysaccharides from Inonotus obliquus, response surface methodology (RSM) was employed to optimize the ultrasonic/microwave assisted extraction (UMAE) conditions. The results indicated that the optimal conditions for UMAE were 90W microwave power, 50W ultrasonic power together with 40kHz ultrasonic frequency, solid/water ratio was 1:20 (W/V) and the extracting time was 19min, respectively. Under the optimal conditions, the yield and purity of polysaccharides were 3.25% and 73.16%, respectively, which are above that of traditional hot water extraction and close to the predicted value (3.07% and 72.54%, respectively). These results confirmed that ultrasonic/microwave assisted extraction (UMAE) of polysaccharides had great potential and efficiency compared with traditional hot water extraction. At the same time, the anti-tumor activities of the polysaccharides from I. obliquus with UMAE were evaluated. The results suggested that polysaccharides from I. obliquus exhibited obvious anti-tumor activities. PMID:20149817

Chen, Yiyong; Gu, Xiaohong; Huang, Sheng-quan; Li, Jinwei; Wang, Xin; Tang, Jian

2010-05-01

472

EM Telemetry Tool for Deep Well Drilling Applications  

SciTech Connect

This final report discusses the successful development and testing of a deep operational electromagnetic (EM) telemetry system, produced under a cooperative agreement with the United States Department of Energy's National Energy Technology Laboratory. This new electromagnetic telemetry system provides a wireless communication link between sensors deployed deep within oil and gas wells and data acquisition equipment located on the earth's surface. EM based wireless telemetry is a highly appropriate technology for oil and gas exploration in that it avoids the need for thousands of feet of wired connections. In order to achieve the project performance objectives, significant improvements over existing EM telemetry systems were made. These improvements included the development of new technologies that have improved the reliability of the communications link while extending operational depth. A key element of the new design is the incorporation of a data-fusion methodology which enhances the communication receiver's ability to extract very weak signals from large amounts of ambient environmental noise. This innovative data-fusion receiver based system adapts advanced technologies, not normally associated with low-frequency communications, and makes them work within the harsh drilling environments associated with the energy exploration market. Every element of a traditional EM telemetry system design, from power efficiency to reliability, has been addressed. The data fusion based EM telemetry system developed during this project is anticipated to provide an EM tool capability that will impact both onshore and offshore oil and gas exploration operations, for conventional and underbalanced drilling applications.

Jeffrey M. Gabelmann

2005-11-15

473

DOE EM industry programs robotics development  

SciTech Connect

The Office of Science and Technology (OST) manages an aggressive program for RD and D, as well as testing and evaluation for the Department of Energy`s (DOE`s) Environmental Management (EM) organization. The goal is to develop new and improved environmental restoration and waste management technologies to clean up the inventory of the DOE weapons complex faster, safer, and cheaper than is possible with currently available technologies. Robotic systems reduce worker exposure to the absolute minimum, while providing proven, cost-effective, and, for some applications, the only acceptable technique for addressing challenging problems. Development of robotic systems for remote operations occurs in three main categories: tank waste characterization and retrieval; decontamination and dismantlement; and characterization, mapping, and inspection systems. In addition, the Federal Energy Technology Center (FETC) has some other projects which fall under the heading of supporting R and D. The central objective of all FETC robotic projects is to make robotic systems more attractive by reducing costs and health risks associated with the deployment of robotic technologies in the cleanup of the nuclear weapons complex. This will be accomplished through development of robots that are cheaper, faster, safer, and more reliable, as well as more straightforward to modify/adapt and more intuitive to operate with autonomous capabilities and intelligent controls that prevent accidents and optimize task execution.

Staubly, R.; Kothari, V.</