2,242 research outputs found
Alternative aviation fuels in Brazil: Environmental performance and economic feasibility
No full textThe aviation sector is responsible for only 3% of the anthropogenic carbon emissions in the world. However, this transport mode – which demands 3-fold more energy per capita than other collective modes, such as railway and bus transportation – is exclusively supplied by fossil fuels, and it has grown at an impressive rate of 7.5% per year in the last decade in the world. In line with the global aims to reduce Greenhouse Gases (GHG) emissions and the dependency on fossil fuels, the decarbonization of the aviation sector – which is typically based on cost-intensive projects with rigorous quality control – is a challenge...BT/Biotechnology and Societ
Un Dios capaz del Hombre. Humanidad en Dios, divinización del hombre
No full textDando por supuesto que el hombre es “capaz de Dios” porque es su imagen, el autor del artículo se pregunta si sería posible, analógicamente, decir que Dios es “capaz del hombre”. Del mismo modo que hay en el hombre una tendencia que le lleva hacia Dios, ¿hay en Dios una tendencia que le lleva hacia lo humano? Dicho de otra manera: ¿la divinidad lleva en sí misma a la humanidad? Dos de los mejores teólogos del siglo XX se han planteado, desde distintas perspectivas, esta cuestión: Karl Barth e Yves Congar. Tras exponer el pensamiento de estos dos autores, el artículo se plantea tres cuestiones relacionadas la tesis de fondo de si Dios es capaz del hombre, a saber: ¿puede hacerse hombre cualquier persona de la Trinidad?, ¿cuál es el motivo de la encarnación?, ¿qué implicaciones tiene “la humanidad de Dios” de cara a nuestro comportamiento y a nuestro lenguaje teológico?
Abstract: Assuming that man is “capable of God” since he is His image, the author of this article questions the possibility of affirming that, likewise, God is “capable of man”. In the same way as there is a tendency in man to go to God, is there a tendency in God to go to man? In other words, does Divinity carry within itself humanity? Karl Barth and Yves Congar, who are two of the best theologians from the 20th century, have already raised the same question from different perspectives. After expounding their thoughts on the matter, this article raises three questions related to the basic thesis of whether God is capable of man, namely: Can any person of the Trinity become a man? What is the reason for incarnation? What are the implications of “humanity in God” with regard to our behaviour and theological language
Heat Pumping in Nanomechanical Systems
No full textWe propose using a phonon pumping mechanism to transfer heat from a cold to a hot body using a propagating modulation of the medium connecting the two bodies. This phonon pump can cool nanomechanical systems without the need for active feedback. We compute the lowest temperature that this refrigerator can achieve.Fil: Chamon, Claudio. Boston University; Estados UnidosFil: Mucciolo, Eduardo R.. University Of Central Florida; Estados UnidosFil: Arrachea, Liliana del Carmen. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Capaz, Rodrigo B.. Universidade Federal do Rio de Janeiro; Brasi
Microscopic model of a phononic refrigerator
No full textWe analyze a simple microscopic model to pump heat from a cold to a hot reservoir in a nanomechanical system. The model consists of a one-dimensional chain of masses and springs coupled to a back gate through which a time-dependent perturbation is applied. The action of the gate creates a moving phononic barrier by locally pinning a mass. We solve the problem numerically using a nonequilibrium Green's function technique. For low driving frequencies and for sharp traveling barriers, we show that this microscopic model realizes a phonon refrigerator. © 2012 American Physical Society.Fil: Arrachea, Liliana del Carmen. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Mucciolo, Eduardo R.. University Of Central Florida; Estados UnidosFil: Chamon, Claudio. Boston University; Estados UnidosFil: Capaz, Rodrigo B.. Universidade Federal do Rio de Janeiro; Brasi
The carbon footprint of alternative jet fuels produced in Brazil: exploring different approaches
No full textAlthough the potential of Alternative Jet Fuels (AJF) to reduce greenhouse gases (GHG) emissions has been widely reported upon in the literature, there are still discrepancies among the results. These may be due to the different GHG accounting methods, including those used by different Low-Carbon Policies (LCPs). To have a clearer understanding of the life cycle performance of AJF, the carbon footprint of ten pathways was estimated, comprising promising feedstocks – such as soybean, palm, sugarcane, sugarcane residues, forestry residues, used cooking oil, beef tallow, and steel off-gases – and ASTM-approved technologies: Hydroprocessed Fatty Acids, Alcohol-to-Jet, and Fischer-Tropsch. Six methodological approaches were used: the attributional and the consequential life cycle assessment, as well as guidelines for the four LCPs: Renovabio (Brazil), CORSIA (aviation sector), RFS (United States), and RED II (Europe). Soybean-based pathway (24 to 98.7 gCO2e/MJ) had the low to no potential for reducing GHG when compared to their fossil counterparts, mainly due to land use change. Of all food-based pathways, AJF produced from sugarcane performed the best (-10.4 to 43.7 gCO2e/MJ), especially when power surplus was credited. AJF from palm oil could present significant GHG reduction for palm expansion in degraded pasturelands. By contrast, Fischer-Tropsch of lignocellulosic residues showed the highest potential for reducing GHG (-95% to -130%). Different from food-based pathways, the potential GHG reduction of residues-based pathways converged within a narrower range (-130% to -50%), except when residual feedstocks have to be redirected from their current economic use. It could lead to GHG emissions higher than fossil fuel.BT/Biotechnology and Societ
Not informed by the author
No full textO objetivo desta dissertação é de apresentar que existe forte relação entre passar no teste de marca e ser capaz de entender representações. Para isso se inicia formando uma base para a discussão da consciência, chegando a conclusão de que a consciência é um problema biológico e como tal deve ser respondido por meio da Biologia. Tendo concluído que a capacidade de se reconhecer (self-recognition) é uma das características da consciência, apresenta-se o teste de marca, faz-se a sua defesa chegando a conclusão de que ele é um teste capaz de apontar se o animal é capaz ou não se de reconhecer por eliminação de qualquer outro tipo de resultado. Por fim, apresenta-se a ligação entre passar no teste de marca e ser capaz de entender representações, colocando a capacidade de se reconhecer como uma prova dessa capacidadeThe main goal of this dissertation is to show that exist a strong relationship between have a positive result in the mark test and be capable of understand representations. For it, we began building a base for the discussion of consciousness, concluding that consciousness is a biological issue and for it need to be answered by Biology. We concluded that the capacity of self-recognition is one of features of consciousness and showing that the mark test is capable to show if the animal is or not capable of self-recognition by elimination of any another kind of result. In the end, we show a bond between have a positive result in the mark test and be able to understand representations, putting the capability of self-recognition as a prove of i
O foco narrativo na ficção contemporânea : uma leitura de Author, Author, de David Lodge
No full textOrientador : Prof. Dr. Caetano Waldrigues GalindoAutor não autorizou a divulgação do arquivo digitalDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Humanas, Letras e Artes, Programa de Pós-Graduação em Letras. Defesa: Curitiba, 26/06/2013Bibliografia: fls. 158-161Área de concentração: Estudos LiteráriosResumo: O propósito deste trabalho é refletir sobre a construção do foco narrativo em Author, Author (2004), de David Lodge, romance biográfico sobre o escritor Henry James (1843-1916). O narrador não se limita a situar o leitor na narrativa: o seu posicionamento em relação aos aspectos factuais da vida e do percurso literário do romancista norte-americano desempenha papel fundamental na discussão das estratégias narrativas da prosa de ficção de James. Na construção ficcional do malogro na noite de estreia de Guy Domville, em Londres, em 1895, por exemplo, é possível perceber a bipartição desse narrador, capaz de contar e mostrar dois episódios que se passam em dois lugares diferentes, simultaneamente. Em outros momentos do romance, a voz autoral embaralha-se com a voz do sujeito da enunciação a tal ponto, que o leitor menos atento encontra certa dificuldade para colocar ordem nos discursos. O abandono gradual da prosa de ficção em busca de uma identidade como dramaturgo, a falta de êxito na dramaturgia, a lenta recuperação psicológica, a retomada da prosa de ficção e o resultado insatisfatório da revisão e escrita de prefácios para as suas obras, para compor The novels and tales of Henry James:The New York Edition (1905), são alguns dos desdobramentos da trajetória de James, discutidos em Author, Author.Abstract: The purpose of this dissertation is to think over the construction process of narrative focus in Author, Author (2004), by David Lodge, a biographical novel about the writer Henry James (1843-1916). The narrator does not limit himself to guiding the reader through the narrative; rather, his attitude towards factual aspects of the life and literary course of the North-American novelist seems to play a fundamental role in the novel. In the fictional construction of the débâcle of "Guy Domville", in London, 1895 for instance it is possible to distinguish the narrator's bipartition, in order to tell and show two different episodes which happen in two different places, simultaneously. In other moments, the authorial voice blends with that of the subject of the enunciation to such a degree that the less attentive reader may not be capable of organizing the discourse, in a first moment. James' gradual movement away from prose fiction so as to find his playwright identity; the lack of success as a playwright; his subsequent slow psychological recovery; the return to prose fiction; and, finally, the weak result of writing and revising prefaces to his literary works in order to put together The Novels and Tales of Henry James: The New York Edition (1905), are some of the most conspicuous events in James' trajectory discussed in Author, Author
Defects in zigzag graphene nanofibres
No full textGrafeno e nanofitas de grafeno vêm, cada vez mais, atraindo o interesse da comunidade científica devido as suas notáveis propriedades. Neste trabalho realizou-se um estudo sistemático da estabilidade de defeitos do tipo divacância, vacância e Stone-Wales em grafeno e nanofitas de grafeno com bordas zigzag. Para tal, fizeram-se cálculos de primeiros princípios, baseados em teoria do funcional da densidade (DFT) na aproximação GGA com o uso de pseudopotenciais ultrasoft e uma base de ondas planas. Também foram feitas simulações de imagens de STM para os defeitos nas nanofitas. Além disso, foram encontrados dois novos defeitos, não publicados em nenhum outro lugar (até onde vai o conhecimento do autor), com energia de formação muito baixa.Graphene and graphene nanoribbons have been attracting a lot of interest from the scientific community because of their novel properties. In this work, a systematic research has been done on the stability and energetics of divacancy, vacancy and Stone-Wales defects in graphene and zigzag graphene nanoribbons. With this goal in mind, ab initio density functional calculations within the GGA approximation, using ultrasoft pseudopotentials and a plane wave basis were done. Also, STM images were simulated for some selected defects. Besides, two new defects, not published elsewhere (to the best knowledge of the author), with very low formation energy are reported
ATRAVESAR Puesta en escena capaz de poner en diálogo, el lenguaje escénico y el lenguaje deportivo acuático
No full textRESUMEN: Este proyecto de grado parte de la inquietud por un lenguaje capaz de poner en diálogo el teatro y la natación artística, antes llamada nado sincronizado, como disciplina deportiva. Este planteamiento se aborda en un proyecto de puesta escena que exige la consolidación de imaginarios, postulados estéticos y
temáticos de la autora, el diseño de una metodología para su desarrollo y el acercamiento de las
intérpretes, en este caso deportistas, al mundo artístico. El lector encontrará en este texto el
desarrollo de las fases del proyecto en una estructura metodológica, en la cual se pueden
evidenciar los procedimientos que permitieron llegar a la puesta en escena.ABSTRACT: This degree project is based on the language capable of establishing a dialogue between theater and artistic swimming, formerly called synchronized swimming, as a sport discipline. called synchronized swimming, as a sport discipline. This approach is approached in a project that requires the consolidation of the author's imaginary, aesthetic and thematic postulates, the author's thematic postulates of the author, the design of a methodology for its development and the approach of the performers, in this case sportswomen. the artistic world, in this case sportswomen. The reader will find in this text the the development of the phases of the project in a methodological structure, in which the procedures that allowed to reach the the procedures that allowed to reach the staging.
Translated with www.DeepL.com/Translator (free version)GNERAL: El producto de este trabajo de grado es contenido audiovisual, en el documento se encuentra el guión técnico para la realización del video y para la visualización de este se debe dar click en los links que estan al final del documento en el apartado de anexos y soportes de registro del trabajo creativo.
TRABAJO DE GRADO CON DISTINCIÓN: ACEPTABLEPregradoMaestro en arte dramátic
- …
