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Search Results: 1 - 10 of 9761 matches for " Henrique; Bravo "
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On the generating functions of a periodic infinite order linear recurrence
António Bravo,Henrique M. Oliveira
Mathematics , 2013,
Abstract: Let G be the space of generating functions of a periodic infinite order linear recurrence. In this paper we provide an explicit procedure for computing a basis of G.
Kneading determinants of infinite order linear recurrences
Jo?o F. Alves,António Bravo,Henrique M. Oliveira
Mathematics , 2013, DOI: 10.1016/j.laa.2015.02.035
Abstract: Infinite order linear recurrences are studied via kneading matrices and kneading determinants. The concepts of kneading matrix and kneading determinant of an infinite order linear recurrence, introduced in this work, are defined in a purely linear algebraic context. These concepts extend the classical notions of Frobenius companion matrix to infinite order linear recurrences and to the associated discriminant of finite order linear recurrences. Asymptotic Binet formulas are deduced for general classes of infinite order linear recurrences as a consequence of the analytical properties of the generating functions obtained for the solutions of these infinite order linear recurrences.
Population Dynamics with Infinite Leslie Matrices
Jo?o Alves,António Bravo,Henrique Oliveira
Quantitative Biology , 2013, DOI: 10.1080/10236198.2014.915967
Abstract: Infinite Leslie matrices, introduced by Demetrius forty years ago are mathematical models of age-structured populations defined by a countable infinite number of age classes. This article is concerned with determining solutions of the discrete dynamical system in finite time. We address this problem by appealing to the concept of kneading matrices and kneading determinants. Our analysis is applicable not only to populations models, but to models of self-reproducing machines and self-reproducing computer programs. The dynamics of theses systems can also be described in terms of infinite Leslie matrices.uation.
Chilean University Students’ Call for Participation and Engagement in What Matters to Them: Is It Possible to Achieve a Shared Decision Making Process in Education Policy?  [PDF]
Paulina Bravo, Baltica Cabieses
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.326155
Abstract: Chile is facing one of its major intellectual revolutions in the last century: organised high school, college and university students have led the most salient educational reform since the one that took place during the dictatorship period. This phenomenon is a pacific revolution based on the power of sound, evidence-based, clear and robust ideas. The purpose of this short essay is to reflect some ideas on the conceptualisation of a shared decision making (SDM) process and how they could be transferred to the current students’ educational revolution in Chile. It provides a reflection on how SDM might concretely contribute to this educational reform and on what future steps could be taken to truly achieves a “participatory” democracy in Chile. According to the authors, this debate illustrates the extent to which the level of participation must rely not on particular individuals but on the establishment of a partnership between parties.
CCS Membrane Development at CIUDEN’s Technology Development Centre for CO2 Capture  [PDF]
Jose A. Gutierrez Bravo
Journal of Power and Energy Engineering (JPEE) , 2018, DOI: 10.4236/jpee.2018.612001
Abstract: CO2 concentration to the atmosphere has risen faster than ever in the last century. This is highly due to fossil fuel combustion which is the major anthropogenic CO2 source. Membrane technology is an important alternative for reliability, flexibility and economically competitiveness for Carbon Capture and Storage (CCS) processes. The use of membranes has applicability to CCS technologies mainly for CO2, O2 or H2 separation, although most of the membrane studies for CO2/O2 production have been carried out at laboratory scale and will require a step further for commercial scale. This paper will present current membranes R & D needs when applied to CCS systems and CIUDEN capabilities for membrane technological development and testing under real conditions. It covers from O2 separation membrane integration in the process, and applied to the oxy-combustion CO2 capture, to post-combustion technologies for membrane CO2 separation, tested under real conditions or H2 production catalytic-membranes through gasification. At CIUDEN CCS facility important membrane evaluations can be carried out for the module integration, testing of materials performance and behavior under real conditions.
Chemical and microbiological evaluation of ensiled sugar cane with different additives
Bravo-Martins, Claudia Eugênia Castro;Carneiro, Heloisa;Castro-Gómez, Raúl Jorge Hernán;Figueiredo, Henrique César Pereira;Schwan, Rosane Freitas;
Brazilian Journal of Microbiology , 2006, DOI: 10.1590/S1517-83822006000400018
Abstract: sugar cane silage has a potential for animal feeding, but uncontrolled growth of undesirable microorganisms may cause nutritional losses and affect the animal productivity and health. the objective of this work was to evaluate the microbiological quality and chemical composition of ensiled sugar cane with and without nutritional additives after 30 days of fermentation. yeasts, filamentous fungi and distinct groups of bacteria were enumerated by plate count methods and the chemical analyzes comprised dry matter, crude protein, fiber content, lignin, and ph. facultative aerobic bacteria and filamentous fungi were not detected during the fermentative process in any of the treatments. the number of yeasts in five varieties of sugar cane silage without additives was about 6.55 log cfu g-1 of silage, and with 1% ammonium sulfate and 1% urea were about 5.86 and 5.50 log cfu g-1 of silage, respectively. the lactic acid bacteria (lab) count without additive was about 8.62 log cfu g-1 of silage, and with 1% ammonium sulfate and 1% urea the count was about 6.40 and 6.54 log cfu g-1 of silage, respectively. the average percent of dry material in the three treatments was 20.76%. the addition of ammonium sulphate and urea has decreased the microbial load after 30 days but it has increased the total crude protein concentration. additives also affected neutral detergent fiber, acid detergent fiber and lignin content in all five varieties of sugar cane silage.
La difícil y necesaria integración entre la atención básica y la salud mental en brasil
Dimenstein,Magda; Neves,Rosane; Paulon,Simone; Nardi,Henrique; Bravo,Omar Alejandro; de Medeiros Galv?o,Vanessa Almira Brito; de Sousa Severo,Ana Kalliny; Figueiró,Rafael;
Psicología desde el Caribe , 2010,
Abstract: the aim of this work was to analyze the integration of family health strategies, one of the cornerstones of brazil's basic healthcare system, with mental health policies in two healthcare units, one located in the city of porto alegre, and the other in natal. in order to do this, both interviews and focus groups were conducted with members of the two healthcare teams and, subsequently, a formation process, articulated to the permanent health education proposal, was implemented. in the analysis of the obtained data, it could be observed that among the members of the healthcare teams of both units two therapeutic strategies prevail, in face of cases considered as mental health type: the prescription of psychiatric medication and the referral to specialists. the bureaucratic procedures of the healthcare teams hinder the implementation of other kinds of strategies and interventions.
Ajab, el burlador burlado: Elementos comunicativos en 1Re 22,1-38
Teología y vida , 2003, DOI: 10.4067/S0049-34492003000400001
Abstract: the objective of this article is to show the resources used in 1kings 22,1-38 to communicate its content. for it the problems and irregularities of the text are identified, the relations with their textual surroundings are settle down, their diverse layers and the sense of each one of them are presented to end up indicating the communicative elements or resources
First record and description of a new species of Sycorax Curtis (Diptera: Psychodidae, Sycoracinae) from the Brazilian Amazon
Bravo, Freddy;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000400007
Abstract: sycorax longispinosa sp. nov. is described from serra do cachorro, pará state, brazil. this new species is the first record of the genus from the brazilian amazon. an identification key for males of species of sycorax from the neotropical region is presented.
Cinco espécies novas de Caenobrunettia (Diptera: Psychodidae, Psychodinae) do Brasil
Bravo, Freddy;
Neotropical Entomology , 2003, DOI: 10.1590/S1519-566X2003000200013
Abstract: five new species of caenobrunettia wagner from brazil are described, caenobrunettia baiana sp. nov., caenobrunettia serrajiboiensis sp. nov., caenobrunettia serrulata sp. nov. and caenobrunettia variata sp. nov. from bahia state, and caenobrunettia carioca sp. nov. from rio de janeiro state. an identification key for males of species of caenobrunettia is presented.
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