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Search Results: 1 - 10 of 12742 matches for " Ant?nio Ferelle "
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Analysis of Dental Traumas and their Sequelae in the Primary Dentition: A Literature Review
Luciana Reichert da Silva Assun??o,Robson Frederico Cunha,Antnio Ferelle
Pesquisa Brasileira em Odontopediatria e Clínica Integrada , 2007,
Abstract: Introduction: Studies have shown that dental traumas in the primary dentition are common events that may result in sequelae that can compromise the affected primary tooth. In the literature, the frequency of dental trauma in the primary dentition is variable, while the age range, gender, etiological factor and the most affected teeth present similar prevalence. Regarding the most common type of trauma, differences may be found due to sampling criteria, such as the type of study and site of conduction of the study. Several sequelae may be observed in traumatized primary teeth, among which coronal discoloration, pulp necrosis, root canal obliteration and root resorption. Studies have pointed to the type of trauma and the age of the child at the moment of trauma as important factors that contribute to the occurrence of these sequelae.Purpose: The purpose of this article is to present a review of relevant studies referring to epidemiological factors and sequelae in traumatized primary teeth, providing to the reader an overview of dental trauma in the primary dentition.Conclusion: In conclusion, based on the analysis of the reviewed articles, it could be observed a direct relationship between the degree of severity of the dental traumas and the occurrence of sequelae in the affected primary teeth, emphasizing the importance of periodical follow up in these cases.
Luxation injuries in primary teeth: a retrospective study in children assisted at an emergency service
Assun??o, Luciana Reichert da Silva;Ferelle, Antnio;Iwakura, Maria Luiza Hiromi;Nascimento, Liliane Silva do;Cunha, Robson Frederico;
Brazilian Oral Research , 2011, DOI: 10.1590/S1806-83242011000200009
Abstract: the purpose of this study was to analyze luxation injuries in children between the ages of 0 and 5 years treated at an emergency service department. a total of 1,703 records, corresponding to a period of 10 years at the emergency center of the baby clinic at londrina state university, brazil, were analyzed. the age, gender, etiologic factors, type of injury, injured teeth, treatment and time interval between injury and treatment were determined for each patient. of the examined records, 409 patients met the study criteria and included a total of 679 injured teeth. statistical analyses were carried out using the chi-square test with the level of significance set at 5%. trauma incidence was higher in boys (57.0%) and in children less than two years of age (40.3%). falling while walking or running was the most predominant etiologic factor (37.7%), and the most prevalent type of injury was subluxation (32.6%). luxation injuries decreased with increasing age (p = 0.045). treatment usually occurred within the first 1-15 days and was significantly associated with the type of trauma (p = 0.041). "monitor only" was the treatment most frequently observed (74.0%). in conclusion, more luxation injuries were found in younger children, predominantly in boys. falls resulting from walking or running were the etiologic factor most observed, with subluxation as the most common type of trauma. treatment usually occurred within the first 15 days after the injury. despite the severity of these injuries, "monitor only" was the eligible treatment.
Intradermal vaccination of adults with three low doses (2 μg) of recombinant hepatitis B vaccine. II. Persistence of immunity and induction of immunologic memory
Elisb?o, Maria do Carmo M;Baldy, José Luís da S;Bonametti, Ana Maria;Reiche, Edna Maria V;Morimoto, Helena K;Pontello, Rubens;Matsuo, Tiemi;Ferelle, Antnio;Neves, Jayme;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000800024
Abstract: of the 110 dentists who had presented seroconversion 50 days after the intradermal application of three 2 μg doses of the belgian recombinant vaccine against hepatitis b (hb), administered eight years before at an interval of one month between the 1st and 2nd doses and of five months between the 2nd and 3rd doses, 51 were included for the assessment of the persistence of immunity. none of the dentists had hepatitis or had received hb vaccine during this period. all subjects were submitted to serological tests for the detection of the following markers of hepatitis b virus (hbv) infection: hbsag, anti-hbc, hbeag, anti-hbe, and anti-hbs, with no hbsag, anti-hbc, hbeag or anti-hbe being detected. a microparticle enzyme immunoassay (meia) revealed the presence of anti-hbs at protective titers (> 10 miu/ml) in 42 dentists (82.4%), with the anti-hbs titer being higher than 100 miu/ml in 36 of them (70.6%) (good responders), between 10 and 100 miu/ml in 6 (11.8%) (poor responders), and lower than 10 miu/ml in 9 (17.6%) (non-responders). according to clinical data and serological tests, none of the dentists had presented disease or latent hbv infection during the eight years following the first vaccination. a 2 μg booster dose was administered intradermally to eight dentists with anti-hbs titers lower than 10 miu/ml (non-responders) and to six dentists with titers ranging from 10 to 100 miu/ml (poor responders); the determination of anti-hbs one month later demonstrated the occurrence of seroconversion in the eight non-responders and an increase in anti-hbs titer in the six poor responders. in summary, the present results demonstrated the prolonged persistence of protection against hbv infection and the development of immunologic memory provided by vaccination against hb - with intra-dermal application of three 2 μg doses of the belgian recombinant vaccine at 0, 1, and 6 months - carried out eight years before in 51 dentists.
Intradermal vaccination of adults with three low doses (2 μg) of recombinant hepatitis B vaccine. I. Seroconversion rate and adverse effects
Baldy, José Luís da S;Elisb?o, Maria do Carmo M;Anzai, Edson T;Pontello, Rubens;Reiche, Edna Maria V;Zaha-Inouye, Marta M;Matsuo, Tiemi;Tonani, Pedro CF;Ferelle, Antnio;Henriques, Jo?o N;Neves, Jayme;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000800023
Abstract: a total of 250 dentists (53.6% men and 46.4% women), with a mean age of 35.1 ± 9.8 years, were submitted to serological tests for the diagnosis of hepatitis b (hb) - hbsag, anti-hbs, anti-hbc, hbeag, and anti-hbe - using a radioimmunoassay. one or more of these markers were detected in 78 individuals (31.2%) who were excluded from the group to be vaccinated. of the 172 hb-susceptible individuals, 135 (78.5%) responded to the call and were intradermally injected with three 2 μg doses of the belgian hb recombinant vaccine, applied at an interval of one month between the 1st and 2nd dose and of five months between the 2nd and 3rd dose. a new determination of hb markers carried out 50 days after the 3rd dose showed that 110 (81.5%) individuals had become anti-hbs positive (65.5% good responders and 34.5% poor responders). mean serum anti-hbs titer of these 110 dentists was 42.4 u s/n, similar in both sexes. the adverse effects analyzed in 106 dentists were: (a) local: pain (12.3%), burning sensation (14.1%), pruritus (25.5%), erythema (28.3%), local heat (18.9%), and a hypochromic spot (32.1%); (b) systemic (4.7%): discomfort in two patients, and fever, anorexia, and asthenia in one patient each. intradermal administration of a fourth 2 μg vaccine dose to 39 dentists (poor or non-responders) increased the total number of anti-hbs-positive individuals from 110 (81.5%) to 114 (84.4%), with the number of good responders increasing from 72 (65.5%) to 85 (74.6%). we conclude that the belgian recombinant vaccine applied in the scheme used here induces a high rate of seroconversion and causes only mild and transitory adverse effects.
Semi-Empirical Oscillator Strengths and Lifetimes for the P IV Spectrum  [PDF]
Antnio Jamil Mania
Spectral Analysis Review (SAR) , 2017, DOI: 10.4236/sar.2017.54005
Abstract: In this work numerical codes carried out in a multiconfiguration Har-tree-Fock relativistic (HFR) approach for the P IV ion are used to obtain the oscillator strengths of each transition as well as the lifetimes of each energy level. With the existing data from several authors that contributed to the spectrum using different light sources, and optimizing the electrostatic parameters by a least-squares procedure when replacing the theoretical values by the experimental ones in the energy matrices, one obtains closer values and according to the observations for the intensities, and also of the lifetimes closer to those that would be obtained experimentally.
Economic Freedom and Foreign Direct Investment: How Different are the MENA Countries from the EU  [PDF]
José CAETANO, António CALEIRO
iBusiness (IB) , 2009, DOI: 10.4236/ib.2009.12010
Abstract: The risk perceived by investors is crucial in the decision to invest, in particular when it concerns a foreign country. The risk associated to any (foreign) investment is a multi-faceted element given that it reflects many aspects that are relevant to (foreign) investors, such as the level of transparency, corruption, rule of law, governance, etc. In this paper we consider the level of economic freedom, as provided by the “Heritage Foundation”, for the most recent years, in order to analyse how is this measure of risk related to the inward foreign direct investment performance index, as provided by the UNCTAD. Given the subjectivity of risk an appropriate methodology consists on using fuzzy logic clustering, which is applied in the paper in order to verify how different the MENA region is from the set of EU-member states. The results show that economic freedom and inward FDI are positively associated, in particular in the cluster of countries that present a higher economic freedom. Of particular interest is the result that some MENA countries belong to the same cluster of most of the EU-countries.
Megalithic Constructions Discovered in the Azores, Portugal  [PDF]
António Félix Rodrigues
Archaeological Discovery (AD) , 2015, DOI: 10.4236/ad.2015.32006
Abstract: The oldest cave art known is of prehistoric origin, dating back to approximately 40,000 years ago in both Asia and Europe. The megalithic constructions in Western Europe and the Mediterranean Region took place mainly in the Neolithic and continued until the Chalcolithic and Bronze Age. The Azores Islands did not seem to have been occupied before the arrival of the Portuguese navigators in the XVth century. Because of that, it was not expected that megalithic structures would be found, or structures that resembled megalithic tombs and rock art in the Azores Islands, geographically located in the Center of the North Atlantic, at 1500 km west of Lisbon (Portugal) and about 1900 km southeast of Newfoundland (Canada). These findings seem to be, historically, a paradox. In a first moment, an oral presentation was made about these findings by the author at the 16th Annual Mediterranean Studies Association Congress, and after that, a field trip took place with the archeologists present at the stated Congress. The perplexity was the dominant conduct of the guests, and some hypotheses that certain archaeologists mentioned were evolved versions which had not been empirically corroborated. Afterwards, new findings were registered at Grota do Medo site, helping to make clear that larger stones had been used to construct structures or monuments. The rock art surrounding the megalithic constructions in the Azores also has similarities with those found in Europe. If these findings belong to the Bronze Age or Iron Age, it can reopen new scientific questions about ancient mid-Atlantic crossings. The present article tries to establish ties among the megalith constructions found in the Azores with those known in Europe.
Spondylodiscitis Caused by Streptococcus dysgalactiae Subspecies Equisimilis: A Case Report of an Increasingly Recognized Pathogenic Organism  [PDF]
Sara Be?a, Sandra Xerinda, António Sarmento
Advances in Infectious Diseases (AID) , 2014, DOI: 10.4236/aid.2014.41004
Abstract:

Streptococcus dysgalactiae subspecies equisimilis (SDSE) is a β-hemolytic Streptococcus that possesses genetic and clinical similarities to Streptococcus pyogenes. It is increasingly recognized as the etiological microorganism of invasive diseases. We report a case of a 74-year-old male who was admitted to this hospital with lower back and neck pain and infected with leg ulcer. The diagnosis of spondylodiscitis C2-C3 and L1-L3 caused by Streptococcus dysgalactiae subsp. equisimilis was made. The present case demonstrates the risk of older patients of developing invasive disease upon skin infection with Streptococcus dysgalactiae subsp. equisimilis, even when risk factors are absent or well controlled (as was diabetes mellitus in this case), suggesting that the pathogenic potential of SDSE should not be underestimated.

Numerical Uncertainty and Its Implications  [PDF]
António F. Rodrigues, Nuno O. Martins
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.23004
Abstract:

A scrutiny of the contributions of key mathematicians and scientists shows that there has been much controversy (throughout the development of mathematics and science) concerning the use of mathematics and the nature of mathematics too. In this work, we try to show that arithmetical operations of approximation lead to the existence of a numerical uncertainty, which is quantic, path dependent and also dependent on the number system used, with mathematical and physical implications. When we explore the algebraic equations for the fine structure constant, the conditions exposed in this work generate paradoxical physical conditions, where the solution to the paradox may be in the fact that the fine-structure constant is calculated through different ways in order to obtain the same value, but there is no relationship between the fundamental physical processes which underlie the calculations, since we are merely dealing with algebraic relations, despite the expressions having the same physical dimensions.

Fast Fading Channel Neural Equalization Using Levenberg-Marquardt Training Algorithm and Pulse Shaping Filters  [PDF]
Tiago Mota, Jorgean Leal, Antnio Lima
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2014, DOI: 10.4236/ijcns.2014.72008
Abstract:

Artificial Neural Network (ANN) equalizers have been successfully applied to mitigate Inter symbolic Interference (ISI) due to distortions introduced by linear or nonlinear communication channels. The ANN architecture is chosen according to the type of ISI produced by fixed, fast or slow fading channels. In this work, we propose a combination of two techniques in order to minimize ISI yield by fast fading channels, i.e., pulse shape filtering and ANN equalizer. Levenberg-Marquardt algorithm is used to update the synaptic weights of an ANN comprise only by two recurrent perceptrons. The proposed system outperformed more complex structures such as those based on Kalman filtering approach.

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