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Search Results: 1 - 10 of 110679 matches for " José Carlos;Dietze "
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Human immunodeficiency virus type- 1 subtypes of infected patients in Espírito Santo, Brazil
Cabral, Valéria P;Cunha, Carla B;Magalhaes, Eneida FL;Pinto-Neto, Lauro F;Couto-Fernandez, José Carlos;Dietze, Reynaldo;Morgado, Mariza G;Ribeiro-Rodrigues, Rodrigo;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000800010
Abstract: genetic variability of human immunodeficiency virus type - 1(hiv-1) is a potential threat for both diagnosis and treatment of hiv/aids, as well as the development of effective vaccines. up to now, hiv subtypes circulating among hiv-positive patients in the state of espírito santo were not known. in the present study, blood samples from 100 therapy-na?ve hiv-1 infected patients were collected and the hiv subtype was determined through the heteroduplex mobility assay (hma). ninety-seven out of 100 studied samples were subtyped by hma, 73 samples (75.2%) were from subtype b, 9 (9.3%) from subtype f, 3 (3.1%) from subtype c, 6 (6.2%) benv/fgag, and another 6 (6.2%) fenv/bgag, what suggests that recombinant viruses were present in the studied samples. twenty-eight percent of the subtype b samples were represented by the brazilian b" subtype, which were identified by rflp with fok i. data presented here demonstrate that the epidemiological characteristics of the hiv epidemic in the state of espírito santo are similar to those from the other southeastern states and helped to better understand the genetic polymorphism of hiv in brazil.
Crime, Self-Protection and Business Growth in Cote d’Ivoire  [PDF]
Assi José Carlos Kimou
Modern Economy (ME) , 2015, DOI: 10.4236/me.2015.610106
Abstract: Cote d’Ivoire was considered as an island of stability and economic prosperity in a region of stagnation, and political turmoil. The situation was reversed in the early 2000, when a decade of instability led to a surge in crime and violence. Yet, very little was known about the economic consequences of crime at the firm level. This paper tested empirically the impact of crime on business activity in Cote d’Ivoire. Using a recent World Bank enterprise survey dataset and a Heckman two-step procedure we showed that crime and private provision of security negatively impacted firms’ profit and investment.
In vitro activity of amphotericin B cochleates against Leishmania chagasi
Sesana, Aretha Molina;Monti-Rocha, Renata;Vinhas, Solange Alves;Morais, Carlos Gustavo;Dietze, Reynaldo;Lemos, Elenice Moreira;
Memórias do Instituto Oswaldo Cruz , 2011, DOI: 10.1590/S0074-02762011000200022
Abstract: cochleate delivery vehicles are a novel lipid-based system with potential for delivery of amphotericin b (amb). in this study, the efficacy of cochleates was evaluated by examining the in vitro activity of amb cochleates (camb) against leishmania chagasi in a macrophage model of infection. we demonstrate that camb is nontoxic to macrophages at concentrations as high as 2.5 μg/ml, whereas the conventional formulation, amb deoxycholate, showed high toxicity at this concentration. the in vitro activity of camb against l. chagasi was found to be similar to that of the reference drug amb deoxycholate, with ed50s of 0.017 μg/ml and 0.021 μg/ml, respectively. considering that l. chagasi affects organs amenable to cochleate-mediated delivery of amb, we hypothesize that camb will be an effective lipid system for the treatment of visceral leishmaniasis.
Tracer distribution in the Pacific Ocean following a release off Japan – what does an oceanic general circulation model tell us?
H. Dietze,I. Kriest
Ocean Science Discussions (OSD) , 2011, DOI: 10.5194/osd-8-1441-2011
Abstract: In the aftermath of an earthquake and tsunami on 11 March 2011 considerable amounts of radioactive materials were accidentally released into the sea off Fukushima-Daiichi, Japan. This study uses a three-dimensional eddy-resolving oceanic general circulation model to explore potential pathways of a tracer, similar to 137Cs, from the coast to the open ocean. Results indicate that enhanced concentrations meet a receding spring bloom offshore and that the area of enhanced concentrations offshore is strongly determined by surface mixed layer dynamics. However, huge uncertainties remain. Among them are the realism of the simulated cross-shelf transport and apparently inconsistent estimates of the particle reactivity of 137Cs which are discussed in a brief literature review. We argue that a comprehensive set of 137Cs measurements, including sites offshore, could be a unique opportunity to both evaluate and advance the evaluation of oceanic general circulation models.
137Cs off Fukushima Dai-ichi, Japan – model based estimates of dilution and fate
H. Dietze,I. Kriest
Ocean Science (OS) & Discussions (OSD) , 2012, DOI: 10.5194/os-8-319-2012
Abstract: In the aftermath of an earthquake and tsunami on 11 March 2011 radioactive 137Cs was discharged from a damaged nuclear power plant to the sea off Fukushima Dai-ichi, Japan. Here we explore its dilution and fate with a state-of-the-art global ocean general circulation model, which is eddy-resolving in the region of interest. We find apparent consistency between our simulated circulation, estimates of 137Cs discharged ranging from 0.94 p Bq (Japanese Government, 2011) to 3.5 ± 0.7 p Bq (Tsumune et al., 2012), and measurements by Japanese authorities and the power plant operator. In contrast, our simulations are apparently inconsistent with the high 27 ± 15 p Bq discharge estimate of Bailly du Bois et al. (2012). Expressed in terms of a diffusivity we diagnose, from our simulations, an initial dilution on the shelf of 60 to 100 m2 s 1. The cross-shelf diffusivity is at 500 ± 300 m2 s 1 significantly higher and variable in time as indicated by its uncertainty. Expressed as an effective residence time of surface water on the shelf, the latter estimate transfers to 43 ± 16 days. As regards the fate of 137Cs, our simulations suggest that activities up to 4 mBq l 1 prevail in the Kuroshio-Oyashio Interfrontal Zone one year after the accident. This allows for low but detectable 0.1 to 0.3 m Bq l 1 entering the North Pacific Intermediate Water before the 137Cs signal is flushed away. The latter estimates concern the direct release to the sea only.
Filters Ranking for DWT-Domain Robust Digital Watermarking
Dietze Martin,Jassim Sabah
EURASIP Journal on Advances in Signal Processing , 2004,
Abstract: In recent years a number of wavelet-based watermarking schemes have been proposed and exhibited improved qualities. The choice of a wavelet filter bank for a digital watermarking scheme can have a significant influence on the scheme's performance in terms of image quality and robustness. We present the results of experiments conducted using two different embedding algorithms (one blind and one nonblind) using a number of popular filter banks. The aim is to find filters that exhibit optimal performance with respect to specified requirements. The results demonstrate that the subband depth of embedding has the most significant influence on the filter bank choice. The kind of attack and the kind of embedding are also important, while marking intensity and compression ratio seem to affect the performance to a less extent. Additionally we show that out of the two embedding methods the quantization-based blind one leads to better overall results than the popular, nonblind one.
Perspectives on sexual and reproductive health among women in an ancient mining area in Brazil
Miranda,Angélica Espinosa; Mer?on-de-Vargas,Paulo Roberto; Corbett,Carlos E. P.; Corbett,Julieta Fran?a; Dietze,Reynaldo;
Revista Panamericana de Salud Pública , 2009, DOI: 10.1590/S1020-49892009000200009
Abstract: the purpose of this study was to describe the reproductive profile and frequency of genital in fections among women living in the serra pelada, a former mining village in the pará state, brazil. a descriptive study of women living in the mining area of serra pelada was performed in 2004 through interviews that gathered demographics and clinical data, and assessed risk be haviors of 209 randomly-selected women. blood samples were collected for rapid assay for hiv; specimens were taken for pap smears and gram stains. standard descriptive statistical analy ses were performed and prevalence was calculated to reflect the relative frequency of each dis ease. of the 209 participants, the median age was 38 years, with almost 70% having less than four years of education and 77% having no income or under 1.9 times the minimum wage of brazil. about 30% did not have access to health care services during the preceding year. risk behaviors included: alcohol abuse, 24.4%; illicit drug abuse, 4.3%; being a sex worker, 15.8%; and domestic violence, 17.7%. abnormal pap smear was found in 8.6%. prevalence rates of in fection were: hiv, 1.9%; trichomoniasis, 2.9%; bacterial vaginosis, 18.7%; candidiasis, 5.7%; chlamydial-related cytological changes, 3.3%; and hpv-related cytological changes, 3.8%. women living in this mining area in brazil are economically and socially vulnerable to health problems. it is important to point out the importance of concomitant broader strategies that include reducing poverty and empowering women to make improvements regarding their health.
Testing for Deterministic Components in Vector Seasonal Time Series  [PDF]
José Luis Gallego, Carlos Díaz
Open Journal of Statistics (OJS) , 2011, DOI: 10.4236/ojs.2011.13017
Abstract: Certain locally optimal tests for deterministic components in vector time series have associated sampling distributions determined by a linear combination of Beta variates. Such distributions are nonstandard and must be tabulated by Monte Carlo simulation. In this paper, we provide closed form expressions for the mean and variance of several multivariate test statistics, moments that can be used to approximate unknown distributions. In particular, we find that the two-moment Inverse Gaussian approximation provides a simple and fast method to compute accurate quantiles and p-values in small and asymptotic samples. To illustrate the scope of this approximation we review some standard tests for deterministic trends and/or seasonal patterns in VARIMA and structural time series models.
New Technique to Create a Suspension Containing Bacteriophages and How It Can Be Used to Control Cabbage Leaf Spot Caused by Xanthomonas campestris PV. campestris  [PDF]
Igor Villela Marroni, José Carlos Germani
Agricultural Sciences (AS) , 2014, DOI: 10.4236/as.2014.54031

The purpose of the present study was to develop a new method for producing and identifying a bacteriophage suspension and research its potential against plant bacteria. The suspension obtained with the new technique was effective in controlling Xanthomonas campestris PV. campestris both in vitro and in vivo. A difference was observed between the suspension with pathogen (PLP) and crude suspension with lesioned plant without the pathogen originated from it (PLN). Clear zones were observed at 48 h/28°C in both (PLS) suspension added saccharose and (PLP). Although PLP and PLS treatments showed no statistical difference in CFU values (5 × 105 and 1 × 105, respectively), they differed from the crude suspension (PLN) and the control. Then, in vivo assessment of suspensions with clear zones in the dishes was performed. In vivo (PLPS) and (PLPP) treatments consisting of inoculum were added to the crude suspensions (PLS and PLP) to increase bacteriophages. A decrease in the disease severity index compared to the control was observed, showing that treatment with the phage suspension protects the plant. The lowest disease indexes were reported with (PLP) and (PLS), with values of 1.46 and 1.40, respectively. The highest averages in dry matter (5.1 inboth treatments) were obtained with (PLP) and (PLS) treatments.

Problem Solving at Provinha Brazil: Implications of Educational Historical and Cultural Theory  [PDF]
José Carlos Miguel, V. P. Silva
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.615169
Abstract: This study discusses the methodological perspective of problem solving facing the guidelines of the Reference Matrix Literacy Mathematics Home, Provinha Brazil, and their implications for teaching practice. Leaving ample literature, it proceeds to the documentary analysis of the latest attempts to curricular reorganization in the Brazilian context, with emphasis on categories established based on the themes traditionally broadcast in the classroom. The analysis is based on categories established from the great themes of mathematical science conveyed in the initial mathematical literacy and its implications for social, political and economic. Also it addresses aspects that stand out in discussions with teachers in initial or continuing education process. Results indicate distance between the ideas discussed in Provinha Brazil and the need to establish a satisfactory relationship which allows the meanings spectrum negotiations aimed at reworking of arithmetic procedures to make them more general, less dependent on contextual variables and less subject to errors of various kinds.
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