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Search Results: 1 - 10 of 3232 matches for " Orlando; Pisciotti "
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Detección de hepatitis B oculta en donantes de bancos sangre, Colombia 2008-2009
Beltrán,Mauricio; Berrío-Pérez,Maritza; Bermúdez,María Isabel; Rey-Benito,Gloria; Camacho,Bernardo; Forero,Patricia; Molina,Gloria Cristina; Fals,Orlando; Pisciotti,Isabel; Oliveros,Yulieth; Cortés,Armando; De La Hoz,Fernando;
Biomédica , 2011,
Abstract: introduction. in colombian blood banks, screening for the surface antigen of hepatitis b is mandatory in all units collected. testing of antibody against core antigens is not administered, although this method may be useful to detect donors infected with the hepatitis b virus. objective. the prevalence of occult hepatitis b was determined by applying a full-serological profile of hepatitis b virus to blood samples of blood donors. materials and methods. between april 2008 and october 2009, a prospective cross sectional study was conducted using 628 samples from donors to blood banks located in four colombian cities. prevalence for hepatitis b had been previously recorded for these cities. serological screening was performed for the complete virus; then nucleic acid amplification was tested in sera that were anti-hb creactive and with a titer of anti-hbs a?¤30 mui/ml. results. of the 628 samples tested, 129 met the serological criteria established to be tested nucleic acid amplification. none of them demonstrated evidence of nucleic acid amplification of hepatitis b virus. conclusions. this is the first study in colombia to detect the presence of blood donors that may be occult hepatitis b carriers. none was detected.
BIOLOGíA REPRODUCTIVA DEL COCOBOLO (ANDINOACARA PULCHER MUSILOVá ET AL. 2009) (PISCES: CICHLIDAE) EN LA CIéNAGA GRANDE DE LORICA (CóRDOBA), COLOMBIA
Olaya-Nieto,Charles W.; Bautista-Blanco,Ana L.; Pérez-Pisciotti,Marcela;
Actualidades Biológicas , 2010,
Abstract: the reproductive biology of cocobolo (andinoacara pulcher musilová et al. 2009) in the ciénaga grande de lorica, sinú river basin (córdoba) colombia, was evaluated. individuals collected between january and december 2005 were analized, with total length (tl) ranging between 7.2-14.5 cm and total weight (wt) between 9.1-89.1 g. the gonads were placed in gilson solution, the vazzoler scale was applied and sexual proportions, a sexual maturity index, spawning season, the length at first maturity, ovocite diameter, and fecundity were estimated. 169 females, 125 males, and 4 undifferentiated individuals were studied, with sexual proportions of 1.4:1 female: male documented, differing from expected. the length at first maturity was estimated at 9.5 cm tl for both sexes; ovocite diameter ranged between 1.352 and 1.605 m and fecundity was estimated in 954 ovocites, with a best-fit equation f = 0.185 lt3,67, n = 14, r = 0.70. the cocobolo is a fish with partial spawning, with a prolonged spawning season that extends throughout the year, with small oocytes and medium fecundity.
BIOLOGíA REPRODUCTIVA DEL COCOBOLO (ANDINOACARA PULCHER MUSILOVá ET AL. 2009) (PISCES: CICHLIDAE) EN LA CIéNAGA GRANDE DE LORICA (CóRDOBA), COLOMBIA REPRODUCTIVE BIOLOGY OF COCOBOLO (ANDINOACARA PULCHER MUSILOVá ET AL. 2009) (PISCES: CICHLIDAE) IN THE CIéNAGA GRANDE DE LORICA (CóRDOBA), COLOMBIA
Charles W. Olaya-Nieto,Ana L. Bautista-Blanco,Marcela Pérez-Pisciotti
Actualidades Biológicas , 2010,
Abstract: Se estudió la biología reproductiva del Cocobolo (Andinoacara pulcher Musilová et al. 2009) en la Ciénaga Grande de Lorica, cuenca del río Sinú (Córdoba), Colombia. Se analizaron individuos colectados entre enero y diciembre 2005, con tallas entre 7,2-14,5 cm de longitud total (LT) y peso total (WT) entre 9,1-89,1 g. Las gónadas se conservaron en solución Gilson, se utilizó la escala de Vazzoler y se estimó proporción sexual, índices de madurez sexual, época de desove, talla media de madurez sexual, diámetro de ovocitos y fecundidad. Se estudiaron 169 hembras, 125 machos y 4 indiferenciados, con proporción sexual hembra: macho de 1,4:1, diferente a lo esperado. La talla media de madurez fue estimada en 9,5 cm LT para sexos combinados, el diámetro de los ovocitos osciló entre 1.352 y 1.605 m y la fecundidad fue estimada en 954 ovocitos, con ecuación de mejor ajuste F = 0,185 LT3,67, n = 14, r = 0,70. El Cocobolo es un pez con desoves parciales, con época o periodo de reproducción prolongada que se extiende durante el a o, con ovocitos peque os y fecundidad media. The reproductive biology of Cocobolo (Andinoacara pulcher Musilová et al. 2009) in the Ciénaga Grande de Lorica, Sinú river basin (Córdoba) Colombia, was evaluated. Individuals collected between January and December 2005 were analized, with total length (TL) ranging between 7.2-14.5 cm and total weight (WT) between 9.1-89.1 g. The gonads were placed in Gilson solution, the Vazzoler scale was applied and sexual proportions, a sexual maturity index, spawning season, the length at first maturity, ovocite diameter, and fecundity were estimated. 169 females, 125 males, and 4 undifferentiated individuals were studied, with sexual proportions of 1.4:1 female: male documented, differing from expected. The length at first maturity was estimated at 9.5 cm TL for both sexes; ovocite diameter ranged between 1.352 and 1.605 m and fecundity was estimated in 954 ovocites, with a best-fit equation F = 0.185 LT3,67, n = 14, r = 0.70. The Cocobolo is a fish with partial spawning, with a prolonged spawning season that extends throughout the year, with small oocytes and medium fecundity.
Meaning Making, Uncertainty Reduction, and Autobiographical Memory: A Replication and Reinterpretation of the TALE Questionnaire  [PDF]
Orlando J. Olivares
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.32028
Abstract: The present research was guided by two primary goals: 1) replicate the empirical structure of the Thinking about Life Experiences (TALE) questionnaire (Bluck, Alea, Habermas, & Rubin, 2005); and 2) explore how the functions of autobiographical memory may interact and support one another. Toward the second goal, it is suggested that the potential functions of autobiographical memory may be understood from an existential framework that is grounded by two principles: humans are driven by a need for meaning and meaning is found in relation to others and other things in the world. In this pursuit of meaning making, and a desire to know what to expect from the world, humans seek to create a coherent set of relations among the various existential elements in their lives (Heine, Proulx, & Vohs, 2006); accordingly, humans strive to reduce uncertainty about the world and their place in it. As such, the TALE was reinterpreted using a relational framework and a 28-item self-report measure was developed. Participants completed the TALE and the reinterpreted TALE (RTALE). The results provide some support for the 3-factor structure of the TALE. The proposed 4-factor structure of the RTALE was supported.
Valuation and Risk Assessment of a Portfolio of Variable Annuities: A Vector Autoregression Approach  [PDF]
Albina Orlando, Gary Parker
Journal of Mathematical Finance (JMF) , 2018, DOI: 10.4236/jmf.2018.82023
Abstract: This paper focuses on assessing the financial position of an insurer issuing a portfolio of Variable Annuities (VAs). Two multivariate models for the underlying and the interest rate are considered. The first model uses a single total rate of return for the basket of assets. The second one, jointly models the rates of return on the n assets in the basket. For simplicity, the insurer is assumed to be able to implement a static hedging programme to manage the risk. As an example, a homogeneous portfolio of VAs with GMDB and GMMB guarantees offering different investment opportunities to the policyholders is studied. The insurer can choose to rebalance the basket of assets regularly or not. Results for these two cases are presented.
Multidisciplinary Approach to a Recovery Plan of Historical Buildings
Luciana Orlando
International Journal of Geophysics , 2011, DOI: 10.1155/2011/258043
Abstract: The paper emphasizes the advantages of employing multiple data techniques—geology, GPS, surveys of cracking, boreholes, seismic refraction and electrical resistivity tomography—to image the shallow stratigraphy and hypothesize the cause of instability of an urban area. The study is focused on the joint interpretation of the crack pattern, topographic monitoring and the features of the underground, to define the area affected by instability and the direction of ground motion with the objective to advance a hypothesis on the cause of the instability of the area and to depict the main features. Borehole stratigraphies for a univocal interpretation of the lithology of electrical and seismic data and electrical resistivity tomography to constrain the interpretation of the lateral velocity variations and thickness of seismic bedrock were used. The geophysical surveys reveals to be complementary in the depicting of underground features. The study is approached at small and medium scale.
Discrete Dynamics in Evolutionary Games
Orlando Gomes
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/416789
Abstract: This paper furnishes a guide for the study of 2-dimensional evolutionary games in discrete time. Evolutionarily stable strategies are identified and nonlinear outcomes are explored. Besides the baseline payoffs of the established strategic interaction, the following elements are also vital to determine the dynamic outcome of a game: the initial fitness of each agent and the rule of motion that describes how individuals switch between strategies. In addition to the dynamic rule commonly used in evolutionary games, the replicator dynamics, we propose another rule, which acknowledges the role of expectations and sophisticates the replicator mechanism.
Racionalidade e escolha
Gomes,Orlando;
Economia Global e Gest?o , 2007,
Abstract: the concept of rationality is one of the most debated and controversial notions that the economic science has to offer. the rational choice paradigm, which involves profit maximization and utility maximization behavior, may be questioned by an important number of studies that remind that the human choice process is not an error exempt process, that it does not ignore emotional factors and that it is not fulfilled outside a social context where interaction determines behavior. this text intends to characterize the way in which the economists work the notion of rational decision and applies some of their ideas to model the decision process. in particular, we build an exercise in which one considers the cognitive costs involved in the choice process and we make use of the discrete choice theory to exemplify how social interaction and stimuli like advertising determine consumption and utility trajectories.
Introduction: Referential descriptions: for and against
Orlando,Eleonora;
An??lisis filos?3fico , 2009,
Abstract: in this introduction i start by presenting and examining the main positions on the current debate concerning the semantic analysis of sentences containing definite descriptions. as is known, the debate in question has started off with russell's proposal (russell 1905), which has been initially criticized by both strawson (1950) and donnellan (1966). nowadays, waters are divided on this issue: some philosophers, representing the so-called univocality approach (kripke 1977, neale 1990), defend russell's original analysis, according to which all definite descriptions are quantificational expressions, whereas there are others who, following strawson′s and donnellan′s objections, consider that at least some descriptions are genuine singular terms and hence have referential meanings. among the defendants of the last approach, known as the ambiguity theory, we can find michael devitt (1981, 2004, 2007a, 2007b). in the second part of the paper, i then survey devitt's stance on some traditional arguments for the ambiguity theory -mainly, the arguments from misdescription, incompleteness, opacity, and anaphora-, and finally i consider the new ones that he has put forward in favor of the existence of referential descriptions: the argument from regularity, the one based on the comparison with demonstratives, and the argument based on weak rigidity.
General term rigidity as identity of designation: Some comments on Devitt's criticisms
Orlando,Eleonora;
An??lisis filos?3fico , 2009,
Abstract: in his paper "rigid application", michael devitt defends a particular version of the socalled 'essentialist conception' of rigidity for general terms, according to which rigid general terms are rigid appliers, namely, terms that if they apply to an object in any possible world then they apply to that object in every possible in which the object exists. devitt thinks that the thereby defined notion of rigidity makes for an adequate extension to general terms of kripke's notion, originally defined for singular ones, inasmuch as it serves to accomplish its same primary task: namely, "to distinguish terms that are not covered by a description theory from ones that are". he then criticizes the alternative conception of rigidity for general terms as identity of designation -specifically, laporte′s (2000) version- on the basis of its entanglement with some controversial metaphysical theses regarding the existence of universals -including a commitment to a selective realism concerning them. in this paper, i try to defend the identity of designation conception from his criticisms: with this aim, i propose a version different from laporte's, and claim it to be the best one to accomplish the above-mentioned primary semantic task, namely, the one of showing that some general terms, just like most ordinary names, cannot be accounted for in descriptive terms.
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