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Search Results: 1 - 10 of 41423 matches for " Jorge X; Leite "
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A model for the A(H1N1) epidemic in Mexico, including social isolation
Velasco-Hernández,Jorge X; Leite,Maria Conceicao A;
Salud Pública de México , 2011, DOI: 10.1590/S0036-36342011000100007
Abstract: objective: we present a model for the 2009 influenza epidemic in mexico to describe the observed pattern of the epidemic from march through the end of august (before the onset of the expected winter epidemic) in terms of the reproduction number and social isolation measures. material and methods: the model uses a system of ordinary differential equations. computer simulations are performed to optimize trajectories as a function of parameters. results: we report on the theoretical consequences of social isolation using published estimates of the basic reproduction number. the comparison with actual data provides a reasonable good fit. conclusions: the pattern of the epidemic outbreak in mexico is characterized by two peaks resulting from the application of very drastic social isolation measures and other prophylactic measures that lasted for about two weeks. our model is capable of reproducing the observed pattern.
Anxiety and pre-symptomatic testing for neurodegenerative disorders  [PDF]
Lêdo Susana, Leite ?ngela, Jorge Sequeiros
Open Journal of Genetics (OJGen) , 2013, DOI: 10.4236/ojgen.2013.32A3003
Abstract:

In this retrospective study we have investigated the anxiety as an impact of pre-symptomatic testing (PST) for 3 autosomal dominant late-onset diseases: Huntington disease (HD), Machado-Joseph disease (MJD) and familial amyloidotic polyneuropathy (FAP) V30MTTR. The study included 686 subjects: 586 (85.4%) were the offspring at risk for FAP, 92 (13.4%) for HD and 8 (1.2%) to MJD. Of these, 352 received the carrier result and 305 the non-carrier result. As indicator of anxiety distress was taken the Self-Rating Anxiety Scale of Zung (SAS), applied in the pre-test and the three post-test moments: three weeks, 6 months and one year after notification of test results. Values decreased significantly along the four evaluation moments, regardless the studied disease or test result. For female population, SAS means cores revealed results of clinical anxiety at pre-test, only decreasing to non clinical scores a year after PST disclosure.

"Que nunca chegue o dia que irá nos separar": notas sobre epistémê arcaica, hermafroditas, andróginos, mutilados e suas (des)continuidades modernas
Leite Jr., Jorge;
Cadernos Pagu , 2009, DOI: 10.1590/S0104-83332009000200011
Abstract: the image of the hermaphrodite or androgyne was essential for all medical-moral-spiritual discourses about sex and gender in our culture, from antiquity until the eighteenth century. with the epistemological change that has happened since the sixteenth century, the old hermaphrodite, associated with the magical and religious world, has lost his/her place in modern classifications. from the nineteenth century on, a new conceptual entity in the west takes place: the pseudo-hermaphrodite from medicine, not the wonder of nature anymore, but its error; a product of the illuminist rationalism and positivism, gradually becoming the father and mother of future transgender identities.
Labirintos conceituais científicos, nativos e mercadológicos: pornografia com pessoas que transitam entre os gêneros
Leite Jr, Jorge;
Cadernos Pagu , 2012, DOI: 10.1590/S0104-83332012000100004
Abstract: this paper aims to discuss how pornography, especially that which involves people who move between sexes/ genders, deal with one of the most characteristic issues of social science: the tension among scientific categories, native conceptions and marketable classifications. in the (even more) saturated and competitive worldwide pornography market, these diffuse boundaries are presented as a vast territory to be colonized by the porn industry logic.
A continuous isotropic-nematic liquid crystalline transition of F-actin solutions
Jorge Viamontes,Jay X. Tang
Physics , 2002, DOI: 10.1103/PhysRevE.67.040701
Abstract: The phase transition from the isotropic (I) to nematic (N) liquid crystalline suspension of F-actin of average length $3~\mu$m or above was studied by local measurements of optical birefringence and protein concentration. Both parameters were detected to be continuous in the transition region, suggesting that the I-N transition is higher than 1st order. This finding is consistent with a recent theory by Lammert, Rokhsar & Toner (PRL, 1993, 70:1650), predicting that the I-N transition may become continuous due to suppression of disclinations. Indeed, few line defects occur in the aligned phase of F-actin. Individual filaments in solutions of a few mg/ml F-actin undergo fast translational diffusion along the filament axis, whereas both lateral and rotational diffusions are suppressed.
Formation of nematic liquid crystalline phase of F-actin varies from continuous to biphasic transition
Jorge Viamontes,Jay X. Tang
Physics , 2005,
Abstract: We show that the isotropic to nematic liquid crystalline phase transition of F-actin can be either continuous or discontinuous, depending critically on the filament length. For F-actin with average filament length > 3 um, we confirm that the transition is continuous in both filament alignment and local concentration. In contrast, for filament length < 2 um the F-actin solution undergoes a first order transition. Tactoidal droplets of co-existing isotropic and nematic domains were observed. Phenomena of nucleation-and-growth and spinodal decomposition both occur, depending sensitively on the exact concentration and average filament length of F-actin. In the late stage, the tactoidal droplets continually grow and occasionally coalesce to form larger granules.
Local abundance and regional distribution of tree species of forest fragments in Brazil: A test of models
Leite,Samuel Jorge; Santos Lopes,Frederico;
Revista de Biología Tropical , 2001,
Abstract: patterns of local abundance and regional distribution of tree species were analyzed on three spatial scales and compared with those predicted by hanski's 1982 original core-satellite model, brown's 1984 nichebased model, and tokeshi's 1992 model. data were collected in seven forest fragments dispersed over approximately 7200 km2, remnants of a former continuous forest in the south of mato grosso do sul state, southwestern brazil. fifty-six east-west-oriented 10 m ¥ 150 m plots were randomly demarcated in those fragments from 1994 to 1996. in each plot all trees having dbh > 0.15 m were recorded and measured. the smallest scale was that of the fragments themselves and the greatest was that of the entire region. no evidence was found of the bimodality predicted by hanski's 1982 model on any scale. on all scales, an unimodal pattern was found whose mode was on the left side (satellite mode) of the distribution. this pattern was in best agreement with the predictions of tokeshi's 1992 model.
Local abundance and regional distribution of tree species of forest fragments in Brazil: A test of models
Samuel Jorge Leite,Frederico Santos Lopes
Revista de Biología Tropical , 2001,
Abstract: Patterns of local abundance and regional distribution of tree species were analyzed on three spatial scales and compared with those predicted by Hanski's 1982 original core-satellite model, Brown's 1984 nichebased model, and Tokeshi's 1992 model. Data were collected in seven forest fragments dispersed over approximately 7200 km2, remnants of a former continuous forest in the south of Mato Grosso do Sul state, southwestern Brazil. Fifty-six east-west-oriented 10 m ¥ 150 m plots were randomly demarcated in those fragments from 1994 to 1996. In each plot all trees having DBH > 0.15 m were recorded and measured. The smallest scale was that of the fragments themselves and the greatest was that of the entire region. No evidence was found of the bimodality predicted by Hanski's 1982 model on any scale. On all scales, an unimodal pattern was found whose mode was on the left side (satellite mode) of the distribution. This pattern was in best agreement with the predictions of Tokeshi's 1992 model. Los patrones de abundancia local y la distribución regional de árboles fueron analizados en tres escalas espaciales y comparados con los modelos de Hanski 1982, núcleo-satélite, el modelo basado en el nicho de Brown 1984, y el modelo de Tokeshi 1992. Los datos fueron recolectados en siete fragmentos remanentes de bosque, distribuidos en aproximadamente 7 200 km2, en Mato Grosso do Sul, suroeste de Brasil. De 1994 a 1996, se demarcó aleatoriamente, en estos fragmentos, cincuenta y seis unidades de muestras, orientados en el sentido este-oeste, con 10 m x 150 m. En cada unidad se midió todos los árboles con DAP > 0.15 m. La menor escala fue el propio fragmento y la mayor escala toda la región. No encontramos evidencias de la bimodalidad prevista por el modelo de Hanski 1982. En todas las escalas se encontró un patrón unimodal, con moda a la izquierda de la distribución (moda satélite). El patrón observado en estos remanentes se ajustó más bien a las previsiones del modelo de Tokeshi 1992.
Editorial: escrever, submeter e publicar na Rebep, a nossa revista indexada
Iuri da Costa Leite,Carla Jorge Machado
Revista Brasileira de Estudos de Popula??o , 2009, DOI: 10.1590/s0102-30982009000100001
Abstract:
Nota dos editores
Iuri da Costa Leite,Carla Jorge Machado
Revista Brasileira de Estudos de Popula??o , 2012,
Abstract:
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