410 results on '"Carlos Luz"'
Search Results
202. The fluid dynamics of a downer fluidised bed using a cluster-based approach (CBA)
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Antonio Carlos Luz Lisbôa, Héctor José Ciro Velásquez, and Germán González Silva
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Physics ,fluidización ,downer reactor ,General Engineering ,numeric simulation ,Building and Construction ,fluidisation ,simulación numérica ,reactor Downer ,lcsh:TA1-2040 ,Downer ,lcsh:Engineering (General). Civil engineering (General) ,Humanities ,Cluster based - Abstract
En este trabajo se estudió el comportamiento fluidodinámico de un reactor de lecho fluidizado tipo Downer, adaptando un modelo matemático de conservación. El modelo matemático está basado en las propiedades y características físicas del sólido y del fluido, utilizando una aproximación CBA (Cluster-Based Approach). La comparación entre los resultados numéricos del modelo y los datos experimentales encontrados en la literatura indicaron que el modelo puede predecir los datos experimentales satisfactoriamente. Las simulación matemática estableció que dentro del reactor Downer existen tres regiones fluidodinámicas activas, caracterizadas por un flujo acelerado, desacelerado y completamente desarrollado, y que esta última región disminuye a medida que se incrementa la velocidad superficial del gas manteniendo el flujo de sólidos por unidad de área constante. The fluid dynamics of a downer reactor were numerically resolved by adapting a mathematical conservation model. The mathematical model was based on the solid and fluid properties and physical characteristics using a cluster-based approach (CBA). Comparing the numerical results to the experimental data found in the literature indicated that the mathematical model could satisfactorily predict the experimental data. The mathematical simulation determined that there were three fluid dynamic areas in the downer reactor which were characterised by accelerated, slowed -down and fully-developed flow. The fully developed flow area in the downer decreased with increased gas surface speed keeping solid flux constant.
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- 2010
203. O campo de detecção de normas e desvios
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Antônio Carlos Luz Costa
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lcsh:Sociology (General) ,lcsh:HN1-995 ,lcsh:HM401-1281 ,Merton, teoria da anomia, normas sociais, Simmel, Bourdieu ,lcsh:Social history and conditions. Social problems. Social reform - Abstract
A partir de uma alternativa de desenvolvimento para a teoria da anomia de Robert K. Merton, uma hipótese sobre a dinâmica do contexto social em que surgem comportamentos desviantes a normas é elaborada. Com base em conceitos de Merton, Simmel, Bourdieu e os semióticos, analisa-se: a) posição do indivíduo (classificado ou não de desviante) em uma estrutura que privilegia determinados sujeitos; e b) como se dá esse privilégio. A hipótese de trabalho: do quanto mais capitais (econômico, social e cultural) o indivíduo dispuser, menores serão suas chances de ter uma ação detectadaem um campo de detecção de normas e desvios. From an alternative development of Robert K. Merton’s anomie theory, the article Detection fi eld of social norms and social deviance discusses the dynamicssocial contexts in which behaviors deviate from social norms. From Merton, Simmel, Bourdieu and the semiotics, the article focuses on (a) the position of the individual (classifi ed or not as deviant) in a structure that privileges certain individuals and (b) how this privilege happens. The hypothesis: the more are the capitals (economic, social, cultural) someone shows, the less are the chances of having the action detected as deviant in a field of detection of norms and deviance.
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- 2008
204. Effect of operating conditions on scrap tire pyrolysis
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Aparecido dos Reis Coutinho, Antonio Carlos Luz Lisbôa, Carla Fabiana Scatolim Rombaldo, and Manoel Orlando Alvarez Méndez
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Materials science ,chemistry.chemical_element ,Scrap ,law.invention ,Natural rubber ,law ,lcsh:TA401-492 ,medicine ,General Materials Science ,activated carbon ,Pollutant ,Waste management ,Mechanical Engineering ,Vulcanization ,Fuel oil ,scrap tire ,Condensed Matter Physics ,pyrolysis ,Sulfur ,chemistry ,Mechanics of Materials ,visual_art ,visual_art.visual_art_medium ,lcsh:Materials of engineering and construction. Mechanics of materials ,Pyrolysis ,Activated carbon ,medicine.drug - Abstract
The ever growing focus on environmental issues has raised concerns about scrap tires, whose major component - vulcanized rubber - does not degrade easily. When burned, tires release toxic gases containing substantial amounts of sulfur and ammonia in addition to other pollutants. Dumped on empty city lots, tires are also a breeding ground for mosquitoes. Many proposals have been put forward to handle the disposal of scrap tires, but none of them have proved to offer a definitive solution. The study reported here investigated the production of fuel oil and activated carbon from the pyrolysis of scrap tires. The initial mass of rubber yielded approximately 46% of oil, 40% of activated carbon and 14% of gases. The resulting activated carbon displayed a specific surface area of 200 m².g-1.
- Published
- 2008
205. PRESENTAZIONE
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Burigana, Riccardo, primary and Marques, Luiz Carlos Luz, additional
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- 2015
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206. TRADIÇÕES RELIGIOSAS ABRAÂMICAS E A QUESTÃO DA INTOLERÂNCIA
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Marques, Luiz Carlos Luz, primary and Burigana, Riccardo, additional
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- 2015
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207. TRADIZIONI RELIGIOSE ABRAMITICHE E LA QUESTIONE DELL’INTOLLERANZA
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Burigana, Riccardo, primary and Marques, Luiz Carlos Luz, additional
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- 2015
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208. EXPEDIENTE/MASTHEAD
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Marques, Luiz Carlos Luz, primary
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- 2015
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209. APRESENTAÇÃO
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Marques, Luiz Carlos Luz, primary and Burigana, Riccardo, additional
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- 2015
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210. Evaluation of the diffusion coefficient for controlled release of oxytetracycline from alginate/chitosan/poly(ethylene glycol) microbeads in simulated gastrointestinal environments
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Galo Cárdenas Triviño, Sérgio P. Campana, Lucia H. Innocentini Mei, Fabio Marcelo Souza Brogna, Maria C. Pinto Cruz, Antonio Carlos Luz Lisbôa, and Sergio P. Ravagnani
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Calcium alginate ,Alginates ,Diffusion ,Biomedical Engineering ,Bioengineering ,Oxytetracycline ,Applied Microbiology and Biotechnology ,Polyethylene Glycols ,Chitosan ,chemistry.chemical_compound ,Coated Materials, Biocompatible ,Glucuronic Acid ,Drug Discovery ,Polymer chemistry ,Materials Testing ,Animals ,Humans ,Computer Simulation ,Solubility ,Drug Carriers ,Process Chemistry and Technology ,Hexuronic Acids ,General Medicine ,Microbead (research) ,Fick's laws of diffusion ,Controlled release ,Gastrointestinal Contents ,Microspheres ,Anti-Bacterial Agents ,Chemical engineering ,chemistry ,Models, Chemical ,Delayed-Action Preparations ,Molecular Medicine ,Ethylene glycol ,Biotechnology - Abstract
Diffusion studies of OTC (oxytetracycline) entrapped in microbeads of calcium alginate, calcium alginate coacervated with chitosan (of high, medium and low viscosity) and calcium alginate coacervated with chitosan of low viscosity, covered with PEG [poly(ethylene glycol) of molecular mass 2, 4.6 and 10 kDa, were carried out at 37+/-0.5 degrees C, in pH 7.4 and pH 1.2 buffer solutions - conditions similar to those found in the gastrointestinal system. The diffusion coefficient, or diffusivity (D), of OTC was calculated by equations provided by Crank [(1975) Mathematics in Diffusion, p. 85, Clarendon Press, Oxford] for diffusion, which follows Fick's [(1855) Ann. Physik (Leipzig) 170, 59] second law, considering the diffusion from the inner parts to the surface of the microbeads. The least-squares and the Newton-Raphson [Carnahan, Luther and Wilkes (1969) Applied Numerical Methods, p. 319, John Wiley & Sons, New York] methods were used to obtain the diffusion coefficients. The microbead swelling at pH 7.4 and OTC diffusion is classically Fickian, suggesting that the OTC transport, in this case, is controlled by the exchange rates of free water and relaxation of calcium alginate chains. In case of acid media, it was observed that the phenomenon did not follow Fick's law, owing, probably, to the high solubility of the OTC in this environment. It was possible to modulate the release rate of OTC in several types of microbeads. The presence of cracks formed during the process of drying the microbeads was observed by scanning electron microscopy.
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- 2004
211. An Ensemble Approach of Feature Selection and Machine Learning Models for Regional Landslide Susceptibility Mapping in the Arid Mountainous Terrain of Southern Peru
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Chandan Kumar, Gabriel Walton, Paul Santi, and Carlos Luza
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ensemble feature selection ,ensemble machine learning ,landslide susceptibility mapping ,geohazards ,Peru ,Science - Abstract
This study evaluates the utility of the ensemble framework of feature selection and machine learning (ML) models for regional landslide susceptibility mapping (LSM) in the arid climatic condition of southern Peru. A historical landslide inventory and 24 different landslide influencing factors (LIFs) were prepared using remotely sensed and auxiliary datasets. The LIFs were evaluated using multi-collinearity statistics and their relative importance was measured to select the most discriminative LIFs using the ensemble feature selection method, which was developed using Chi-square, gain ratio, and relief-F methods. We evaluated the performance of ten different ML algorithms (linear discriminant analysis, mixture discriminant analysis, bagged cart, boosted logistic regression, k-nearest neighbors, artificial neural network, support vector machine, random forest, rotation forest, and C5.0) using different accuracy statistics (sensitivity, specificity, area under curve (AUC), and overall accuracy (OA)). We used suitable combinations of individual ML models to develop different ensemble ML models and evaluated their performance in LSM. We assessed the impact of LIFs on ML performance. Among all individual ML models, the k-nearest neighbors (sensitivity = 0.72, specificity = 0.82, AUC = 0.86, OA = 78%) and artificial neural network (sensitivity = 0.71, specificity = 0.85, AUC = 0.87, OA = 79%) algorithms showed the best performance using the top five LIFs, while random forest, rotation forest, and C5.0 (sensitivity = 0.76–0.81, specificity = 0.87, AUC = 0.90–0.93, OA = 82–84%) outperformed other models when developed using all twenty-four LIFs. Among ensemble models, the ensemble of k-nearest neighbors and rotation forest, k-nearest neighbors and artificial neural network, and artificial neural network and rotation forest outperformed other models (sensitivity = 0.72–0.73, specificity = 0.83–0.84, AUC = 0.86, OA = 79%) using the top five LIFs. The landslide susceptibility maps derived using these models indicate that ~2–3% and ~10–12% of the total study area fall within the “very high” and “high” susceptibility. The obtained susceptibility maps can be efficiently used to prioritize landslide mitigation activities.
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- 2023
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212. Seed-Cotton Ultrasound Properties for Yield Measurement
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Carlos Luz and S. D. Filip To
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Materials science ,Yield (engineering) ,business.industry ,Acoustics ,Sample (material) ,Attenuation ,fungi ,Ultrasound ,food and beverages ,Transducer ,Position (vector) ,otorhinolaryngologic diseases ,Ultrasonic sensor ,business ,psychological phenomena and processes ,Energy (signal processing) - Abstract
Two ultrasonic transducers were installed through cutout holes on opposite walls of a chamber. The materials under investigation (samples) were put between the transducers inside a sensing zone in three different elevations. Results of the experiment indicated that there were relationships between acoustical energy and mass of the material. This suggests that, within a limit, mass can be measured acoustically. The amount of acoustical energy attenuation is dependent on the position of the sample in the sensing zone. The accuracy of measurements can be improved if the variation in the position of the sample in the chamber can be minimized.
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- 2001
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213. Trigeminovagal reflex: an review
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Edvaldo Dória dos Anjos, Djenal Santana, Anderson Lessa Siqueira, João Carlos Luz Freire, José Carlos Pereira, Augusto César Lima Gonçalves, Carlos Umberto Pereira, and Juliano César Macêdo de Oliveira
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Complicações intra-operatórias ,lcsh:R ,lcsh:Surgery ,lcsh:Medicine ,lcsh:RD1-811 ,Reflexo oculocardíaco ,Trigeminovagal reflex ,reflexo oculocardíaco ,complicações intra-operatórias ,reflexo trigeminovagal ,Reflexo trigeminovagal ,Oculocardiac reflex ,Surgery ,Neurology (clinical) ,Intraoperative complications - Abstract
Determinados procedimentos cirúrgicos na face, no crânio e na órbita podem desencadear o reflexo trigeminovagal. É feita a revisão sobre fisiopatologia, diagnóstico, tratamento e profilaxia._________________________________________________________________________________________ ABSTRACT: Operative procedures in face, skull and orbit may develop the so called trigeminovagal reflex. Its phisiopathology, diagnosis, treatment and prophylaxis are reviewed.
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- 1999
214. Single cell transfection of human-induced pluripotent stem cells using a droplet-based microfluidic system
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Camilo Pérez-Sosa, Anahí Sanluis-Verdes, Ariel Waisman, Antonella Lombardi, Gustavo Rosero, Alejandro La Greca, Shekhar Bhansali, Natalia Bourguignon, Carlos Luzzani, Maximiliano. S. Pérez, Santiago Miriuka, and Betiana Lerner
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microfluidic ,single cell ,droplets ,transfection ,hiPSCs ,Science - Abstract
Microfluidic tools have recently made possible many advances in biological and biomedical research. Research in fields such as physics, engineering, chemistry and biology have combined to produce innovation in microfluidics which has positively impacted diverse areas such as nucleotide sequencing, functional genomics, single-cell studies, single molecules assays and biomedical diagnostics. Among these areas, regenerative medicine and stem cells have benefited from microfluidics since these tools have had a profound impact on their applications. In this study, we present a high-performance droplet-based system for transfecting individual human-induced pluripotent stem cells. We will demonstrate that this system has great efficiency in single cells and captured droplets, like other microfluidic methods but with lower cost. Moreover, this microfluidic approach can be associated with the PiggyBac transposase-based system to increase its transfection efficiency. Our results provide a starting point for subsequent applications in more complex transfection systems, single-cell differentiation interactions, cell subpopulations and cell therapy, among other potential applications.
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- 2022
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215. Predetermination and Change in Living Beings
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Carlos Luz Mínguez
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Phenomenology (philosophy) ,Philosophy ,Selection principle ,Epistemology - Abstract
Phenomenology constitutes a movement which unfolds in different directions: some are nearer to Edmund Husserl’s thoughts (1859–1938), as the orthodox manifestation of the movement; others are further afield, as would be the case of Nicolai Hartmann (1882–1950): his thoughts are considered to be outside the scope of phenomenology, whereas others see him as a heterodox manifestation of the movement. In any case, Hartmann uses phenomenology in order to purify philosophical problems, without disregarding the scientific contribution. This dependence on the sciences is more obvious in his last works, and especially in his Ontology, and this paper will focus on one of its aspects.
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- 1998
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216. Investigations on oil shale particle reactions
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Lisbôa, Antonio Carlos Luz
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Oil shale research and development has grown in the shadow of the petroleum industry. The uncertainty of petroleum prices, its growing worldwide consumption and limited availability have, motivated many oil shale rich countries to investigate means to produce and use shale oil as an alternative. On the other hand, high shale oil costs, its processing complexities and relatively stable petroleum prices have hampered the establishment of the shale oil industry. Oil is recovered from shale via endothermic reactions, heat for which is generated by combustion of the residual carbon in the spent shale. Oil shale pyrolysers and combustors have generally been designed on an empirical basis. The objective of this work was to produce working mathematical models of raw shale pyrolysis and spent shale combustion, adequate to describe the mechanism by which these reactions occur within oil shale particles, and to investigate the parameters involved. Among these, the most relevant and difficult to obtain are the kinetic ones. Verified models for single particles can then be used to describe oil shale particle reactions in any reactor configuration. A three-dimensional model was developed to describe the transient temperature profile within a cubic shaped shale particle. Also a model for shale devolatilization is presented, based on an unreacted core mechanism. Both models are especially apt for large particles, of the type used in moving bed reactors. A thorough investigation was conducted about the equipment and methods used to obtain pyrolysis kinetic parameters. A standard thermogravimetric apparatus was used to generate these data for two shales: New Brunswick shale, and shale from the Irati Formation in Brazil. The potential of a first order—on kerogen concentration—rate equation to represent shale devolatilization was assessed. A one-dimensional model was developed to describe the transient temperature profile and carbon and oxygen concentration within a particle of spent shale undergoing combustion. The model assumed that oxygen was able to access any part of the particle's interior. Kinetic parameters for shale combustion were also obtained by thermogravimetry using Irati shale. The first order dependence of the combustion process on oxygen concentration was confirmed, and kinetic parameters as a function of temperature were extracted from the results. The models were solved using the method of lines, a standard numerical method for solving sets of parabolic partial differential equations. It was implemented in conjunction with the finite difference method. Models for larger particles were verified by heating and devolatilization experiments with 1.3 cm wide particles suspended in a tube furnace. Most of the experimental work addressed two different shales; one from New Brunswick, Canada, and the other from the Irati Formation, in Brazil.
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- 1997
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217. A Igreja do Brasil na preparação do Vaticano II (The participation of the Church from Brazil in the preparation of Vatican II) - DOI: 10.5752/P.2175-5841.2011v9n24p986
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Marques, Luiz Carlos Luz, primary and Beozzo, José Oscar, additional
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- 2011
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218. Oil Shale
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Weiss, Hans‐Jürgen, primary and Lisboa, Antonio Carlos Luz, additional
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- 2010
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219. Deep Learning Neural Networks Highly Predict Very Early Onset of Pluripotent Stem Cell Differentiation
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Ariel Waisman, Alejandro La Greca, Alan M. Möbbs, María Agustina Scarafía, Natalia L. Santín Velazque, Gabriel Neiman, Lucía N. Moro, Carlos Luzzani, Gustavo E. Sevlever, Alejandra S. Guberman, and Santiago G. Miriuka
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Medicine (General) ,R5-920 ,Biology (General) ,QH301-705.5 - Abstract
Summary: Deep learning is a significant step forward for developing autonomous tasks. One of its branches, computer vision, allows image recognition with high accuracy thanks to the use of convolutional neural networks (CNNs). Our goal was to train a CNN with transmitted light microscopy images to distinguish pluripotent stem cells from early differentiating cells. We induced differentiation of mouse embryonic stem cells to epiblast-like cells and took images at several time points from the initial stimulus. We found that the networks can be trained to recognize undifferentiated cells from differentiating cells with an accuracy higher than 99%. Successful prediction started just 20 min after the onset of differentiation. Furthermore, CNNs displayed great performance in several similar pluripotent stem cell (PSC) settings, including mesoderm differentiation in human induced PSCs. Accurate cellular morphology recognition in a simple microscopic set up may have a significant impact on how cell assays are performed in the near future. : In this article, Miriuka and colleagues show that deep learning convolutional neural networks can be trained to accurately classify light microscopy images of pluripotent stem cells from those of early differentiating cells, only minutes after the differentiation stimulus. These algorithms thus provide novel tools to quantitatively characterize subtle changes in cell morphology. Keywords: deep learning, machine learning, artificial intelligence, computer vision, neural networks, pluripotent stem cells, embryonic stem cells, differentiation, light transmission microscopy, cell imaging
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- 2019
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220. Effect of operating conditions on scrap tire pyrolysis
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Rombaldo, Carla Fabiana Scatolim, primary, Lisbôa, Antonio Carlos Luz, additional, Méndez, Manoel Orlando Alvarez, additional, and Coutinho, Aparecido dos Reis, additional
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- 2008
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221. Wound Healing by Allogeneic Transplantation of Specific Subpopulation From Human Umbilical Cord Mesenchymal Stem Cells
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María Belén Palma, Carlos Luzzani, Laura B. Andrini, Fernando Riccillo, Guillermo Buero, Pablo Pelinski, Ana M Inda, Ana Lía Errecalde, Santiago Miriuka, Edgardo D. Carosella, and Marcela N. Garcia
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Medicine - Abstract
In normal physiological conditions, restoration of a functional epidermal barrier is highly efficient; nevertheless, when it fails, one of the main consequences is a chronic ulcerative skin defect, one of the most frequently recognized complications of diabetes. Most of these chronic venous ulcers do not heal with conventional treatment, leading to the appearance of infections and complications in the patient. Treatments based on the use of autologous mesenchymal stem cells (MSC) have been successful; however, its implementation entails complications. The umbilical cord offers an unlimited source of adult MSC (ucMSC) from the Wharton’s jelly tissue with the same relevant features for clinical applicability and avoiding difficulties. It has recently been characterized by one specific subpopulation derived from ucMSC, the differentiated mesenchymal cells (DMCs). This subpopulation expresses the human leukocyte antigen-G (HLA-G) molecule, a strong immunosuppressive checkpoint, and vascular endothelial growth factor (VEGF), the most potent angiogenic factor. Considering the importance of developing a more effective therapy for wound treatment, especially ulcerative skin lesions, we analyzed DMC safety, efficacy, and therapeutic potential. By immunohistochemistry, umbilical cords HLA-G and VEGF positive were selected. Flow cytometry revealed that 90% of the DMC subpopulation are HLA-G+, CD44+, CD73+, CD29+, CD105+, CD90+, and HLA-DR−. Reverse transcription-polymerase chain reaction revealed the expression of HLA-G in all of DMC subpopulations. Upon co-culture with the DMC, peripheral blood mononuclear cell proliferation was inhibited by 50%. In a xenograft transplantation assay, DMC improved wound healing with no signs of rejection of the transplanted cells in immunocompetent mice. This study confirms that HLA-G allows allogeneic cell transplantation, and VEGF is fundamental for the restoration of the failure in blood supply. DMC population has positive effects on wound healing by promoting local angiogenesis in skin lesions. DMC could play a very important role in regenerative medicine and could be a novel allogeneic cell-therapeutic tool for wound healing.
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- 2021
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222. Hartmann: The Historicity of Cultural Data
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Carlos Luz Mínguez
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Literature ,business.industry ,Philosophy ,Historicity ,business - Published
- 1991
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223. Practical Cost-Based Approach for the Voltage Ancillary Service
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J. Carlos Mello, J.J. Hedgecock, J. Carlos Luz, and E.L. da Silva
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Rate of return ,Restructuring ,media_common.quotation_subject ,AC power ,Payment ,Microeconomics ,Deregulation ,Risk analysis (engineering) ,Remuneration ,Business ,Energy supply ,Electrical and Electronic Engineering ,Activity-based costing ,media_common - Abstract
Summary form only given, as follows. The restructuring and deregulation of the electricity sector most noticeably involves the introduction of competition into energy supply. In parallel with this, however, there is an increasing desire amongst transmission system operators, generators and consumers for commercial principles to be applied to transmission services, including the provision of voltage support and reactive power control. The identification of the costs of providing such services is an important first step towards developing a transmission services market. Implementing a payment structure based on the remuneration of incurred costs can be an attractive option to commercial power sector players, who wish such costs to be recoverable at an appropriate rate of return, and system operators, who need to be assured of the availability of the necessary services. This paper addresses both the principles and practical issues involved in developing cost-based payments for reactive power, with reference to the ongoing restructuring of the Brazilian power sector.
- Published
- 2001
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224. Extracellular vesicles from pluripotent stem cell-derived mesenchymal stem cells acquire a stromal modulatory proteomic pattern during differentiation
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Alejandro La Greca, Claudia Solari, Veronica Furmento, Antonella Lombardi, Maria Celeste Biani, Cyntia Aban, Lucia Moro, Marcela García, Alejandra Sonia Guberman, Gustavo Emilio Sevlever, Santiago Gabriel Miriuka, and Carlos Luzzani
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Medicine ,Biochemistry ,QD415-436 - Abstract
Stem cells: Proteins in secreted vesicles offer potential therapy Tiny protein-containing vesicles released by partially differentiated stem cells contain a suite of therapeutic proteins that make them a promising alternative to cell-based treatments. Carlos Luzzani from LIAN-CONICET in Buenos Aires, Argentina, and colleagues reprogrammed skin cells to an embryonic-like state, and then coaxed these induced pluripotent stem cells (iPSCs) to form mesenchymal stem/stromal cells (MSCs), a type of adult stem cell that can give rise to bone, muscle and other tissues. The researchers analyzed all the proteins produced by the iPSCs, MSCs and the sub-micron sized bubbles known as extracellular vesicles that each secretes. They found that vesicles from MSCs, but not iPSCs, included a small set of proteins involved in regeneration and immune modulation. These vesicles may provide the regenerative benefits of MSCs without the safety risks of a cell-based therapy.
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- 2018
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225. PIWI-interacting RNAs are differentially expressed during cardiac differentiation of human pluripotent stem cells.
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Alejandro La Greca, María Agustina Scarafía, María Clara Hernández Cañás, Nelba Pérez, Sheila Castañeda, Carolina Colli, Alan Miqueas Möbbs, Natalia Lucía Santín Velazque, Gabriel Neiman, Ximena Garate, Cyntia Aban, Ariel Waisman, Lucía Natalia Moro, Gustavo Sevlever, Carlos Luzzani, and Santiago Gabriel Miriuka
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Medicine ,Science - Abstract
PIWI-interacting RNAs (piRNAs) are a class of non-coding RNAs initially thought to be restricted exclusively to germline cells. In recent years, accumulating evidence has demonstrated that piRNAs are actually expressed in pluripotent, neural, cardiac and even cancer cells. However, controversy remains around the existence and function of somatic piRNAs. Using small RNA-seq samples from H9 pluripotent cells differentiated to mesoderm progenitors and cardiomyocytes we identified the expression of 447 piRNA transcripts, of which 241 were detected in pluripotency, 218 in mesoderm and 171 in cardiac cells. The majority of them originated from the sense strand of protein coding and lncRNAs genes in all stages of differentiation, though no evidences of amplification loop (ping-pong) were found. Genes hosting piRNA transcripts in cardiac samples were related to critical biological processes in the heart, like contraction and cardiac muscle development. Our results indicate that these piRNAs might have a role in fine-tuning the expression of genes involved in differentiation of pluripotent cells to cardiomyocytes.
- Published
- 2020
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226. Generation of iPSC line iPSC-FH2.1 in hypoxic conditions from human foreskin fibroblasts
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María Questa, Leonardo Romorini, Carolina Blüguermann, Claudia María Solari, Gabriel Neiman, Carlos Luzzani, María Élida Scassa, Gustavo Emilio Sevlever, Alejandra Sonia Guberman, and Santiago Gabriel Miriuka
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Biology (General) ,QH301-705.5 - Abstract
Human foreskin fibroblasts were used to generate the iPSC line iPSC-FH2.1 using the EF1a-hSTEMCCA-loxP vector expressing OCT4, SOX2, c-MYC and KLF4, in 5% O2 culture conditions. Stemness was confirmed, as was pluripotency both in vivo and in vitro, in normoxia and hypoxia. Human Embryonic Stem Cell (hESC) line WA-09 and reprogrammed fibroblast primary culture HFF-FM were used as controls.
- Published
- 2016
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227. MicroRNA characterization in equine induced pluripotent stem cells.
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Lucia Natalia Moro, Guadalupe Amin, Veronica Furmento, Ariel Waisman, Ximena Garate, Gabriel Neiman, Alejandro La Greca, Natalia Lucia Santín Velazque, Carlos Luzzani, Gustavo E Sevlever, Gabriel Vichera, and Santiago Gabriel Miriuka
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Medicine ,Science - Abstract
Cell reprogramming has been well described in mouse and human cells. The expression of specific microRNAs has demonstrated to be essential for pluripotent maintenance and cell differentiation, but not much information is available in domestic species. We aim to generate horse iPSCs, characterize them and evaluate the expression of different microRNAs (miR-302a,b,c,d, miR-205, miR-145, miR-9, miR-96, miR-125b and miR-296). Two equine iPSC lines (L2 and L3) were characterized after the reprogramming of equine fibroblasts with the four human Yamanaka's factors (OCT-4/SOX-2/c-MYC/KLF4). The pluripotency of both lines was assessed by phosphatase alkaline activity, expression of OCT-4, NANOG and REX1 by RT-PCR, and by immunofluorescence of OCT-4, SOX-2 and c-MYC. In vitro differentiation to embryo bodies (EBs) showed the capacity of the iPSCs to differentiate into ectodermal, endodermal and mesodermal phenotypes. MicroRNA analyses resulted in higher expression of the miR-302 family, miR-9 and miR-96 in L2 and L3 vs. fibroblasts (p
- Published
- 2018
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228. Cyclin Kinase-independent role of p21CDKN1A in the promotion of nascent DNA elongation in unstressed cells
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Sabrina F Mansilla, Agustina P Bertolin, Valérie Bergoglio, Marie-Jeanne Pillaire, Marina A González Besteiro, Carlos Luzzani, Santiago G Miriuka, Christophe Cazaux, Jean-Sébastien Hoffmann, and Vanesa Gottifredi
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genomic stability ,DNA replication ,p21 CDKN1A ,common fragile site ,DNA elongation ,Medicine ,Science ,Biology (General) ,QH301-705.5 - Abstract
The levels of the cyclin-dependent kinase (CDK) inhibitor p21 are low in S phase and insufficient to inhibit CDKs. We show here that endogenous p21, instead of being residual, it is functional and necessary to preserve the genomic stability of unstressed cells. p21depletion slows down nascent DNA elongation, triggers permanent replication defects and promotes the instability of hard-to-replicate genomic regions, namely common fragile sites (CFS). The p21’s PCNA interacting region (PIR), and not its CDK binding domain, is needed to prevent the replication defects and the genomic instability caused by p21 depletion. The alternative polymerase kappa is accountable for such defects as they were not observed after simultaneous depletion of both p21 and polymerase kappa. Hence, in CDK-independent manner, endogenous p21 prevents a type of genomic instability which is not triggered by endogenous DNA lesions but by a dysregulation in the DNA polymerase choice during genomic DNA synthesis.
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- 2016
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229. In Vitro and In Vivo Development of Horse Cloned Embryos Generated with iPSCs, Mesenchymal Stromal Cells and Fetal or Adult Fibroblasts as Nuclear Donors.
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Ramiro Olivera, Lucia Natalia Moro, Roberto Jordan, Carlos Luzzani, Santiago Miriuka, Martin Radrizzani, F Xavier Donadeu, and Gabriel Vichera
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Medicine ,Science - Abstract
The demand for equine cloning as a tool to preserve high genetic value is growing worldwide; however, nuclear transfer efficiency is still very low. To address this issue, we first evaluated the effects of time from cell fusion to activation (
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- 2016
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230. Manganese Superoxide Dismutase Gene Expression Is Induced by Nanog and Oct4, Essential Pluripotent Stem Cells' Transcription Factors.
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Claudia Solari, Camila Vázquez Echegaray, María Soledad Cosentino, María Victoria Petrone, Ariel Waisman, Carlos Luzzani, Marcos Francia, Emilly Villodre, Guido Lenz, Santiago Miriuka, Lino Barañao, and Alejandra Guberman
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Medicine ,Science - Abstract
Pluripotent stem cells possess complex systems that protect them from oxidative stress and ensure genomic stability, vital for their role in development. Even though it has been reported that antioxidant activity diminishes along stem cell differentiation, little is known about the transcriptional regulation of the involved genes. The reported modulation of some of these genes led us to hypothesize that some of them could be regulated by the transcription factors critical for self-renewal and pluripotency in embryonic stem cells (ESCs) and in induced pluripotent stem cells (iPSCs). In this work, we studied the expression profile of multiple genes involved in antioxidant defense systems in both ESCs and iPSCs. We found that Manganese superoxide dismutase gene (Mn-Sod/Sod2) was repressed during diverse differentiation protocols showing an expression pattern similar to Nanog gene. Moreover, Sod2 promoter activity was induced by Oct4 and Nanog when we performed a transactivation assay using two different reporter constructions. Finally, we studied Sod2 gene regulation by modulating the expression of Oct4 and Nanog in ESCs by shRNAs and found that downregulation of any of them reduced Sod2 expression. Our results indicate that pluripotency transcription factors positively modulate Sod2 gene transcription.
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- 2015
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231. Practical cost-based approach for the voltage ancillary service
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da Silva, E.L., primary, Hedgecock, J.J., additional, Carlos Mello, J., additional, and Carlos Luz, J., additional
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232. EDA-containing fibronectin increases proliferation of embryonic stem cells.
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Noelia Losino, Ariel Waisman, Claudia Solari, Carlos Luzzani, Darío Fernández Espinosa, Alina Sassone, Andrés F Muro, Santiago Miriuka, Gustavo Sevlever, Lino Barañao, and Alejandra Guberman
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Medicine ,Science - Abstract
Embryonic stem cells (ESC) need a set of specific factors to be propagated. They can also grow in conditioned medium (CM) derived from a bovine granulosa cell line BGC (BGC-CM), a medium that not only preserves their main features but also increases ESC´s proliferation rate. The mitogenic properties of this medium were previously reported, ascribing this effect to an alternative spliced generated fibronectin isoform that contains the extra domain A (FN EDA(+)). Here, we investigated if the FN EDA(+) isoform increased proliferation of mouse and human ES cells. We analyzed cell proliferation using conditioned media produced by different mouse embryonic fibroblast (MEF) lines genetically engineered to express FN constitutively including or excluding the EDA domain (FN EDA(-)), and in media supplemented with recombinant peptides containing or not the EDA. We found that the presence of EDA in the medium increased mouse and human ESC's proliferation rate. Here we showed for the first time that this FN isoform enhances ESC's proliferation. These findings suggest a possible conserved behavior for regulation of ES cells proliferation by this FN isoform and could contribute to improve their culturing conditions both for research and cell therapy.
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- 2013
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233. Practical cost-based approach for the voltage ancillary service.
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da Silva, E.L., Hedgecock, J.J., Carlos Mello, J., and Carlos Luz, J.
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- 2002
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234. Mass and heat transfer to and from oil shale exposed to a gas stream at constant temperature
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Carla Cristina Moratori and Antonio Carlos Luz Lisbôa
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oil shale ,mass transfer ,heat transfer ,pyrolysis ,mathematical modelling. ,Technology ,Science (General) ,Q1-390 - Abstract
The Irati Formation located in Southern Brazil is the worldâs second largest resource of oil shale from which shale oil has been produced by Petrobras, a Brazilian state-owned oil company, by the Petrosix® process. The shale plant was sold to a private company in November 2022. This study analyses the mass and heat transfer between oil shale particles and a gas medium by mathematical modelling using Fortran programs, focusing on the temperature and moisture gradients within the shale particles. It also carries out parametric sensitivity analysis regarding shale thermal conductivity, heat transfer coefficient, effective mass diffusivity, shale density and size. The particle size and effective mass diffusivity have a great impact on heat and mass transfer.
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- 2023
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235. Deusas, santas e o pentagrama mágico em A lenda do cavaleiro verde (2021)
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Gabriela Carlos Luz
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Feminismo ,Literatura Arturiana ,Literatura Medieval ,Sobrenatural ,Language and Literature ,Literature (General) ,PN1-6790 - Abstract
O poema medieval Sir Gawain e o Cavaleiro Verde teve sua adaptação cinematográfica intitulada A Lenda do Cavaleiro Verde lançada em 2021 com direção de David Lowery com Dev Patel no papel de Gawain. Tanto o poema quanto o filme apresentam uma quantidade significativa de personagens femininas que possuem algum contato com o sobrenatural e que agem como guias e mediadoras de testes na jornada de Gawain. Este trabalho pretende abordar como estas personagens femininas foram adaptadas para o longa-metragem pensando em como a conjunção com magia e o simbolismo do pentagrama foi utilizado de maneira a relacionar tais personagens como arquitetas da aventura e consequentemente como representações divinas de lendas pagãs que foram sincretizadas com o universo religioso cristão. O trabalho também foca em referências da literatura medieval para adaptações para o cinema moderno discutindo como dada a dificuldade em adequar personagens complexas como Morgana le Fay e símbolos como o pentagrama, o diretor utilizou representações estratégicas para que audiências modernas tivessem uma melhor compreensão da aventura do cavaleiro de Arthur. O estudo é baseado em análises de feminismo e literatura arturiana como expressado por Larissa Tracy e Geraldine Heng; de textos críticos acerca de adaptações arturianas como o de Maureen Fries, além de autores especializados no poema original como J. A. Burrow e utiliza a tradução mais recente em língua portuguesa do poema medieval feito por Artur Avelar em 2020.
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- 2023
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236. Analysis of the Suicide Registry Flow between the Forensic Institute (IML) and DataSUS
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Antônio Carlos Luz Costa, Roque Pinto, Alciene Pereira da Silva, and Itamar de Jesus Souza
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suicídio, análise de registros, saúde pública, risco, declaração de óbito ,Social history and conditions. Social problems. Social reform ,HN1-995 ,Sociology (General) ,HM401-1281 - Abstract
The paper analyzes the suicide records of death certificates (DC) of Itabuna and around (Bahia) between 2010 and 2012, comparing them with the corresponding information recorded in DataSUS . The data contained in the DC of the Forensic Institute Itabuna were analyzed with a follow-up of their registration flow, comparing them with the DataSUS final data. The research results show: suicide frequency data for the period and region based on DC; comparison between the frequencies obtained in the primary source and DataSUS; steps of the registration flow; problems that contribute to underreporting.
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- 2020
237. MIELOLIPOMA EM GLÂNDULA ADRENAL DE UM CANINO
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Monique Togni, Joana Cristina Smaha de Jesus Lima, Maisa Martins Quirilos Assis, Willian Fontini Marangon, and Jean Carlos Luz
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Canino ,Endócrino ,Neoplasia ,Rim ,Science ,Social Sciences - Abstract
O presente relato visa descrever os achados macroscópicos e histopatológicos de um canino com mielolipoma em glândula adrenal esquerda. Tumores de glândula adrenal são neoplasias frequentes em cães, porém mielolipomas são geralmente encontrados em bovinos ou primatas sendo infrequente em outras espécies. Um cadáver de um canino, sem raça definida, com diagnóstico clínico de doença renal aguda foi encaminhado ao Laboratório de Patologia para a realização da necropsia. Na abertura da cavidade abdominal foi encontrada uma massa crânio-medial ao rim esquerdo que circundava o hilo renal. O rim esquerdo apresentava leve aumento de volume. A massa foi diagnosticada microscopicamente como Mielolipoma e no rim esquerdo foram encontradas alterações que sugeriam isquemia renal. O diagnóstico de mielolipoma de adrenal foi considerado um achado incidental de necropsia, sendo a causa da morte deste canino uma doença renal bilateral de origem não determinada. Porém, apesar deste tumor não estar relacionado ao óbito do animal lesões compatíveis com isquemia no rim esquerdo foram encontradas, demonstrando, que tumores benignos de adrenal, como o mielolipoma, podem gerar lesões por compressão no rim.
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- 2020
238. Fidelidade inconteste à igreja católica e abertura aos mundos religioso e secular: a mística cristã de Chiara Lubich
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Koury, Jussara Rocha, Cabral, Newton Darwin de Andrade, Aragão, Gilbraz de Souza, Marques, Luiz Carlos Luz, Faria, Evangelina Maria Brito de, and Pereira, Maria Teresa Nobre
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Diálogo religioso ,Espiritualidade ,Ecumenismo ,Movimento dos Focolares ,Religious dialogue ,Spirituality ,Teses ,TEOLOGIA [CIENCIAS HUMANAS] ,Theses ,Focolare Movement ,Ecumenism - Abstract
Submitted by Biblioteca Central (biblioteca@unicap.br) on 2022-10-05T18:31:48Z No. of bitstreams: 2 Ok_claudia_maria_cruz_silva.pdf: 962717 bytes, checksum: a0c926a8ab2dcf4e3fae31e353fbd2fb (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2022-10-05T18:31:48Z (GMT). No. of bitstreams: 2 Ok_claudia_maria_cruz_silva.pdf: 962717 bytes, checksum: a0c926a8ab2dcf4e3fae31e353fbd2fb (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2022-04-28 This thesis, presented to the Postgraduate Program in Religion Sciences of the Catholic University of Pernambuco, sheds light over the Christian mystique of Chiara Lubich, founder of the Society of Mary (Focolare Movement), which began during the Second World War, in the city of Trento, northern Italy. After outlining the object of the thesis, the problem emerged from two questions: how did Chiara Lubich's mystique go beyond the monastic walls and opened the doors to the contemporary world without neglecting its Christocentric character? Is a fully aligned mystique, obedient to the Catholic Church as an institution, to overcome its walls, flooding secular worlds, without breaking with the Church itself, even feasible? This, then, is the problem that served as a streamline for our thesis. Our general objective was thus defined: to situate the impact of Chiara Lubich's Christian mysticism under the prism of her undisputed fidelity to the Catholic Church and her openness to the religious and secular worlds. The trails were defined by the specific objectives: to draw an overview of the ideologies and the Catholic Church in the first half of the 20th century, during the Second World War; to identify flashes of mystique in the childhood and youth of Chiara Lubich; to analyze the evolution of the Christian mystique of the Catholic Church until the first half of the 20th century; to investigate the mystical experience of Chiara Lubich; and to specify the rupture of walls in the religious world and the flood in the secular world caused by the mystique of Chiara Lubich. Among the theorists we use, we highlight Eric Hobsbawn and Giacomo Medina, who gave us important contributions to the history of war and the Church, respectively; Bernard McGinn, with his framework on mysticism, in addition to the great contribution we found in Roger Bastide on the same subject; Johann Baptist Metz and his proposal for a “mystique with open eyes”, which goes towards the world, especially in search of those who suffer most, to find the face of God and dive into his mystery; the story of Chiara, supported by journalists Jim Gallagher (Scottish) and Armando Torno (Italian); and the abundant bibliography available on the aspects of her mystique, especially what she herself wrote and left as a legacy, not only for the members of the Movement, but for the Church and for humanity. As this is a qualitative research, we support our methodology in Cecilia Minayo and pursue two guidelines: the first, documentary, especially in documents from the collection made available on Chiara Lubich by the official websites of the Focolare Movement and the Vatican; and the second, bibliographic, whose review goes through the aspects and authors already mentioned, as well as others, including Chiara herself. As a result, we conclude that Chiara Lubich's mystique positively impacted both the religious and secular world in various directions. With regard to the first, the proposition of experiencing a Christianity committed to daily life, and, as one of its consequences, the construction of dialogues with various Christian denominations towards ecumenism and interreligious dialogue; regarding the second, we highlight the works in fields of the modern world: economics, politics, culture, preservation of the environment, education – especially in Education for Peace, proposals that point to the establishment of fairer and more respectful relations with differences. Therefore, a mystique that permeates human relations in their diversity. Questa tesi, presentata al Corso di Laurea Magistrale in Scienze Religiose, presso la UNICAP, Universidade Católica de Pernambuco, si è concentrata sulla mistica cristiana di Chiara Lubich, fondatrice dell'Opera di Maria (Movimento dei Focolari), che ha avuto il suo inizio durante la Seconda Guerra Mondiale, nella città di Trento, situata nell’Italia settentrionale. Una volta definito l'oggetto della tesi, sono stati sviluppati due interrogativi: come ha fatto il misticismo di Chiara Lubich ad oltrepassare le mura monastiche e ad aprire le porte alla contemporaneità senza trascurare il suo carattere cristocentrico? È possibile, per un mistico pienamente allineato, obbediente alla Chiesa cattolica come istituzione, andare oltre le sue mura e inondare i mondi secolari, senza rompere con la Chiesa stessa? Ecco dunque la questione, che è stata il filo conduttore della nostra tesi. Il nostro obiettivo generale è stato così definito: situare l'impatto della mistica cristiana di Chiara Lubich attraverso il prisma della sua indiscussa fedeltà alla Chiesa cattolica e della sua apertura al mondo religioso e secolare. I percorsi sono stati definiti dagli obiettivi specifici: fornire una panoramica delle ideologie e della Chiesa cattolica nella prima metà del XX secolo, durante la seconda guerra mondiale; identificare sprazzi di mistica nell'infanzia e nella giovinezza di Chiara Lubich; analizzare l'evoluzione della mistica cristiana della Chiesa cattolica fino alla prima metà del XX secolo; indagare sull'esperienza mistica di Chiara Lubich; e specificare la rottura dei muri nel mondo religioso e l'inondazione nel mondo secolare causato dalla mistica di Chiara Lubich. Tra i teorici che abbiamo utilizzato, segnaliamo Eric Hobsbawn e Giacomo Medina, che ci hanno dato importanti contributi rispettivamente nella storia della guerra e nella Chiesa; Bernard McGinn, con la sua esperienza sul misticismo, oltre al grande contributo che troviamo in Roger Bastide sullo stesso argomento; Johann Baptist Metz e la sua proposta in “La mistica degli occhi aperti”, che esce nel mondo, soprattutto alla ricerca di chi soffre di più, per trovare il volto di Dio e immergersi nel suo mistero; La storia di Chiara, supportata dai giornalisti Jim Gallagher (scozzese) e Armando Torno (italiano) e l'abbondante bibliografia disponibile su aspetti della sua mistica, in particolare ciò che lei stessa ha scritto e lasciato in eredità, non solo per i membri del Movimento dei Focolari, ma per la Chiesa e per l'umanità intera. Trattandosi di una ricerca qualitativa, abbiamo sostenuto la nostra metodologia in Cecília Minayo e perseguito due direttrici: la prima, documentale, soprattutto nella raccolta di documenti su Chiara Lubich, messa a disposizione sui siti ufficiali del Movimento dei Focolari e del Vaticano; e la seconda, bibliografica, la cui rassegna permea gli aspetti e gli autori già citati, oltre ad altri, tra cui la stessa Chiara. Di conseguenza, concludiamo che la mistica di Chiara Lubich ha avuto un impatto positivo, sia sul mondo religioso che su quello secolare in diverse direzioni. Quanto al primo, la proposta di vivere un cristianesimo impegnato nella quotidianità e, come una delle sue conseguenze, la costruzione di dialoghi con le diverse confessioni cristiane nella direzione dell'ecumenismo e del dialogo interreligioso; quanto al secondo, agendo nei campi del mondo moderno: nell'economia, nella politica, nella cultura, nella salvaguardia dell'ambiente, nell'educazione – soprattutto nell'Educazione alla Pace, proposte più eque che puntano alla creazione di rapporti più giusti e rispettosi delle reciproche differenze. Una mistica, dunque, che permea i rapporti umani nella loro diversità. Esta tese, apresentada ao Programa de Pós-Graduação em Ciências da Religião, da Universidade Católica de Pernambuco, debruçou-se sobre a mística cristã de Chiara Lubich, fundadora da Obra de Maria (Movimento dos Focolares), que teve seu início durante a Segunda Guerra Mundial, na cidade de Trento, norte da Itália. Definido o objeto da tese, o problema aflorou a partir de dois questionamentos: como a mística de Chiara Lubich foi além dos muros monásticos e abriu as portas para o mundo contemporâneo sem negligenciar seu caráter cristocêntrico? É possível uma mística plenamente alinhada, obediente à Igreja Católica enquanto instituição, ultrapassar seus muros, inundar mundos seculares, sem romper com a própria Igreja? Eis, então, o problema que serviu de fio condutor para esta nossa tese. Nosso objetivo geral ficou assim definido: situar o impacto da mística cristã de Chiara Lubich sob o prisma de sua fidelidade inconteste à Igreja Católica e de sua abertura aos mundos religioso e secular. Os trilhos foram definidos pelos objetivos específicos: traçar uma panorâmica acerca das ideologias e da Igreja Católica na primeira metade do século XX, durante a Segunda Guerra Mundial; identificar lampejos de mística na infância e juventude de Chiara Lubich; analisar a evolução da mística cristã da Igreja Católica até a primeira metade do século XX; investigar a experiência mística de Chiara Lubich; e especificar o rompimento de muros no mundo religioso e a inundação no mundo secular provocados pela mística de Chiara Lubich. Entre os teóricos que utilizamos, destacamos Eric Hobsbawn e Giacomo Medina, que nos deram aportes importantes para a história da guerra e da Igreja, respectivamente; Bernard McGinn, com seu arcabouço sobre mística, além da grande contribuição que encontramos em Roger Bastide sobre o mesmo assunto; Johann Baptist Metz e sua proposta de uma “mística de olhos abertos”, que vai em direção ao mundo, sobretudo em busca daqueles que mais sofrem, para encontrar a face de Deus e mergulhar em seu mistério; a história de Chiara, respaldada pelos jornalistas Jim Gallagher (escocês) e Armando Torno (italiano); e a farta bibliografia disponível sobre os aspectos de sua mística, sobretudo o que ela mesma escreveu e deixou como legado, não apenas para os membros do Movimento, mas para a Igreja e para a humanidade. Por se tratar de uma pesquisa qualitativa, respaldamos nossa metodologia em Cecília Minayo e perseguimos duas diretrizes: a primeira, documental, sobretudo em documentos oriundos do acervo disponibilizado sobre Chiara Lubich pelos sites oficiais do Movimento dos Focolares e do Vaticano; e a segunda, bibliográfica, cuja revisão perpassa os aspectos e autores já mencionados, além de outros, inclusive a própria Chiara. Como resultado, concluímos que a mística de Chiara Lubich impactou positivamente tanto o mundo religioso quanto o mundo secular em várias direções. No que se refere ao primeiro, a proposição de vivência de um cristianismo comprometido com a vida cotidiana, e, como uma de suas consequências, a construção de diálogos com diversas denominações cristãs na direção do ecumenismo e do diálogo inter-religioso; em relação ao segundo, a atuação nos campos do mundo moderno: na economia, na política, na cultura, na preservação do meio ambiente, na educação – em especial na Educação para a Paz, propostas que apontam para o estabelecimento de relações mais justas e respeitosas para com as diferenças. Portanto, uma mística que permeia as relações humanas em sua diversidade.
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- 2022
239. A Igreja do Brasil na preparação do Vaticano II (The participation of the Church from Brazil in the preparation of Vatican II) - DOI: 10.5752/P.2175-5841.2011v9n24p986
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Luiz Carlos Luz Marques and José Oscar Beozzo
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Helder Câmara. Plano de Emergência. Colegialidade. Vaticano II. Igreja do Brasil. Emergency Plan. Collegiality. Vatican II. Catholic Church in Brazil ,Philosophy. Psychology. Religion ,Religions. Mythology. Rationalism ,BL1-2790 ,Religion (General) ,BL1-50 - Abstract
Levando–se em conta os leitores do século XXI, ao debruçar-se sobre a participação da Igreja católica brasileira na preparação do Concílio Vaticano II, o presente estudo parte de três perguntas: a) o quê interessa saber sobre a participação brasileira? b) É este um tema relevante? c) Alguns brasileiros participação significativamente na fase preparatória? Para responder apropriadamente a essas questões os autores propõem um conceito diferente de “participação” na preparação do Vaticano II por parte do episcopado brasileiro. O artigo não foca apenas a presença deste ou daquele bispo ou perito nas comissões do Concílio, mas propõe a idéia de que o mais importante foi a auto-preparação, que durante certo tempo permaneceu “latente” e posteriormente se organizou através de um Concílio com um episcopado jovem, com uma média de idade em torno de 54 anos e 11 de experiência como bispo. Por isso, conscientes dos problemas pastorais que a realidade do subdesenvolvimento punha à Igreja, e com uma incipiente experiência de participação colegial, desenvolvida na construção do Plano de Emergência, este episcopado não só vivenciou em profundidade o “evento” conciliar, como foi o primeiro a sair dele organizado para colocá-lo em prática. Daqui a relevância desta reconstrução.Palavras-chave: Helder Câmara. Plano de Emergência. Colegialidade. Vaticano II. Igreja Católica no BrasilAbstractThis article aims to show the contribution of the Brazilian Catholic Church in the preparation of the Second Vatican Council. To fulfill such purpose the present study focus its research in three basic questions: a) what is important to know about the Brazilian participation? b) Is this a relevant topic? C) Some Brazilians participate significantly in the preparatory phase? To respond appropriately to these issues the authors propose a different concept of "participation" in the preparation of Vatican II by the Brazilian episcopate. The article focuses not only the presence of this or that bishop or the expert commissions of the Council, but proposes the idea that the most important was the self-preparation, which for a time remained "latent" and later was organized by a council with a young bishop, with an average age around 11 and 54 years of experience as a bishop. Therefore, aware of the problems that the pastoral reality of underdevelopment put the Church, and with an incipient experience of participating high school, developed in the construction of the Emergency Plan, the bishops not only experienced in depth the "event" to reconcile, as was the first it held out to put it into practice. Key words: Helder Câmara. Emergency Plan. Collegiality. Vatican II. Catholic Church in Brazil.
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- 2012
240. The fluid dynamics of a downer fluidised bed using a cluster-based approach (CBA)
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Germán González Silva, Antônio Carlos Luz Lisboa, and Héctor José Ciro Velasquéz
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downer reactor ,fluidisation ,numeric simulation ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The fluid dynamics of a downer reactor were numerically resolved by adapting a mathematical conservation model. The mathematical model was based on the solid and fluid properties and physical characteristics using a cluster-based approach (CBA). Comparing the numerical results to the experimental data found in the literature indicated that the mathematical model could satisfactorily predict the experimental data. The mathematical simulation determined that there were three fluid dynamic areas in the downer reactor which were characterized by accelerated, slowed-down and fully-developed flow. The fully developed flow area in the downer decreased with increased gas surface speed keeping solid flux constant.
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- 2010
241. Continuous production of CO2 and CO2/CH4 hydrates using the microreactor technology NetMIX : application in capture, storage and separation of gases
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Lozada García, Nayla Xiomara, 1991, Nunhez, José Roberto, 1961, Lisbôa, Antônio Carlos Luz, Franco, Telma Teixeira, Spogis, Nicolas, Toledo, Eduardo Coselli Vasco de, Universidade Estadual de Campinas. Faculdade de Engenharia Química, Programa de Pós-Graduação em Engenharia Química, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Gas natural - Hidratos ,Claratos ,Hydrates - Analysis ,Hidratos ,Clathrates ,Hydrates ,Natural gas - Hydrates ,Gases ,Hidratos - Análise ,Methane ,Metano - Abstract
Orientadores: José Roberto Nunhez, Daniela da Silva Damaceno e Lucidio Cristovão Fardelone Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química Resumo: O aumento das emissões de gases de efeito estufa (GEE) devido ao crescimento populacional e industrial é a principal causa do aquecimento global. No cenário atual da mudança climática governos e indústrias juntam esforços para diminuir a emissão de GEE através da implementação de tecnologias de Captura e Armazenamento de Carbono (CCS) e Captura, Armazenamento e Utilização de Carbono (CCUS). Um dos processos usados nas tecnologias CCS e CCUS é a formação de hidratos de gás. As metodologias empregadas na formação destas estruturas cristalinas apresentam limitações relacionadas com a troca térmica e a transferência de massa, ocasionando que o processo demore mais tempo do necessário. No presente trabalho foi avaliada a tecnologia de reatores NetMIX na formação de hidratos de gás, usando os equipamentos MicroNetMIX e LabNetMIX. O MicroNetMIX tem a capacidade de processar entre 1 e 2 kg/h de gás e o LabNetMIX pode processar até 10 kg/h de gás. Esses equipamentos são os primeiros protótipos da tecnologia NetMIX aplicados até o momento na formação de hidratos de CO2, CH4 e da mistura CO2 + CH4. Uma das principais aplicações da formação de hidratos de gás é na separação de CO2 da mistura CO2 + CH4, representando uma forma inovadora de lidar com os gases provenientes dos poços de petróleo. O gás associado aos poços do pré sal normalmente apresenta uma grande quantidade de CO2, que em alguns casos é superior à 40 %. Essa elevada porcentagem de CO2 dificulta o tratamento do gás, portanto, deve ser retirada para a comercialização do gás natural, para o armazenamento do CO2 ou disponibilização deste gás para uso industrial. A produção contínua de hidratos de gás usando os equipamentos a tecnologia NetMIX demostrou que a nucleação e o crescimento dos hidratos ocorrem em curto tempo, promovendo uma formação rápida e continua. Isto ocorre devido às características geométricas do reator, permitindo a troca térmica suficiente para remover o calor liberado durante a reação. Além disso, o reator NetMIX apresenta uma eficiente transferência de massa provocando o contato gás-água suficiente para promover a dissolução do gás na fase aquosa. O uso do promotor termodinâmico brometo de tetra-n-butilamônio (TBAB) propiciou a formação de hidratos de CO2 em condições termodinâmicas moderadas, isto é, pressões mais baixas e temperaturas mais altas. Além disso, os resultados demostraram que o TBAB também tem influência no tempo de formação dos hidratos de gás. Foram usadas as técnicas de cromatografia gasosa (CG) e espectroscopia de infravermelho para caracterizar as amostras de hidratos. O CG permitiu estimar os mols de CO2 armazenados nas cavidades do retículo cristalino. No caso da separação do CO2, essa técnica de análise possibilitou a determinação da fração molar dos gases presentes no hidrato compactado e comprovar a separação do CO2. Isto é, na fase hidrato foi encontrada uma maior quantidade de CO2 do que a quantidade de CO2 alimentada. A nova tecnologia de reatores NetMIX usada na de formação de hidratos é considerada uma estratégia promissora para a aplicação em tecnologias CCS, mudando a forma de lidar com gases como o CO2 e o CH4 que representam um risco para o meio ambiente Abstract: The increase in greenhouse gas emissions (GHG) due to the populational and industrial increment is the major cause of global warming. In the current scenery of climate change governments and industries join efforts to decrease the emissions of GEE through the implementation of Carbon Capture and Storage (CCS) and Carbon Capture, Utilization, and Storage (CCUS) technologies. One of the processes used in the CCS and CCUS technologies is the formation of gas hydrates. Methodologies used in the formation of these crystalline structures present limitations regarding heat and mass transfer. These limitations cause the hydration process to last more time than necessary. This work assessed an innovative technology of microreactors named NetMIX using in the formation of gas hydrates. Experiments were carried out using two devices with different production capacities. One of them is the MicroNetMIX which process 1-2 kg/h of gas, and the other is the LabNetMIX which process 10 kg/h of gas. These two devices are the first prototypes of this technology applied until this moment to study the formation of gas hydrates with CO2, CH4, and CO2 + CH4 mixture. One of the applications of gas hydrates using these devices is in the separation of CO2 from the CO2 + CH4 mixture, representing an innovative form to deal with the gas steamed in petroleum wells. Associated gas in the pre-salt wells normally contains a high amount of CO2, in some cases greater than 40 %. This high quantity of CO2 needs to be removed to commercialize the natural gas, store the CO2 or make available this gas for industrial use. The continuous production of gas hydrates using the NetMIX technology demonstrated that the nucleation and growth processes of hydrates occur in noticeably brief time, develop a rapid and continuous formation. This happens due to the geometrical characteristics of the reactor, allowing enough heat transfer to remove the heat release in the reaction. Also, this reactor presents a mass transfer efficiency allowing enough gas/water contact to promote the dissolution of gas in the aqueous phase. The use of the promoter tetra-n-butyl ammonium bromide (TBAB) allows the hydrate formation in moderate conditions, lower pressures, and higher temperatures. Also, TBAB shows influence in the reaction and production time. Two characterization techniques were used in this work: gas chromatography and infrared spectroscopy. The gas chromatography results allow to estimate the quantity of gas content in the cavities of gas hydrates. In the case of hydrates formed to separate CO2 from a mixture CO2 + CH4 mixture, gas chromatography showed that the crystalline structure separates gases and found a high quantity of CO2 in the hydrate phase compared with the feedstock. Hydrate formation using NetMIX technology is an important strategy applied in the CCS technology to change the form in how to lead with gases such as CO2 and CH4 that represent a substantial risk to the environment Doutorado Engenharia Química Doutora em Engenharia Química CAPES 88887.496308/2020-00
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- 2022
242. Oxygen production by PSA : a computational evaluation
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Souza, Bernardo Dias Fróes Píramo de, 1996, Lisbôa, Antônio Carlos Luz, 1954, Maciel, Maria Regina Wolf, Silva, Fabrício Machado da, Universidade Estadual de Campinas. Faculdade de Engenharia Química, Programa de Pós-Graduação em Engenharia Química, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Simulação computacional ,Adsorção ,Gases ,Adsorption ,Computer simulation - Abstract
Orientador: Antonio Carlos Luz Lisbôa Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química Resumo: O processo de adsorção por oscilação de pressão, em inglês pressure swing adsorption – PSA, é um processo cíclico de adsorção que pode ser empregado na obtenção de corrente enriquecida em gás oxigênio, O2, com o uso de certas zeólitas. A pressão da corrente de alimentação e o tempo de ciclo exercem grande influência tanto na pureza quanto na quantidade do produto desejado. Portanto, sabendo-se da importância e da elevada demanda por O2 em distintos segmentos, como a siderurgia, a área hospitalar e a área de tratamento de efluentes, o aprofundamento no estudo de técnicas alternativas à destilação criogênica, principal forma de produção de gases, deve ser estimulado, tanto experimental quanto computacionalmente. Este trabalho teve, assim, o objetivo de estudar computacionalmente, com o auxílio do software Aspen Adsorption, o processo PSA para obtenção de corrente enriquecida em O2, com pureza entre 90 e 93 % V/V, considerando-se corrente de alimentação com composição similar ao ar atmosférico (79 % de N2, 20 % de O2 e 1 % de Ar, em base volumétrica). Avaliou-se as pressões de 4,5, 6,5 e 8,5 bar e os tempos de ciclo de 60, 120 e 240 segundos, este último restrito ao cenário de maior pressão, em uma planilha com dois leitos de adsorção, empacotados com zeólita 5A, sendo um deles representado pelo recurso de repetição de leitos, ofertado pelo software. Com a redução progressiva da pressão da corrente de alimentação, observou-se uma queda na quantidade de O2 armazenada após os leitos de adsorção, o que já era esperado. Apenas nos cenários de 8,5 e 6,5 bar, 60 segundos, e 4,5 bar, 120 e 60 segundos, a pureza desejada não foi alcançada. Para o cenário de 8,5 bar, o tempo de ciclo de 120 segundos foi o mais adequado; o tempo de ciclo de 240 segundos, em comparação, fez com que as respostas da unidade ficassem lentas (maior intervalo de tempo é requerido para alcançar determinado valor), mas os valores obtidos para pureza e quantidade armazenada de O2 foram análogos; o cenário de 60 segundos não conseguiu alcançar a pressão desejada de 8,5 bar, nem o valor estipulado para a pureza. Enfatiza-se que, em todos os cenários, não houve mudança na configuração das válvulas. Por fim, as principais contribuições deste trabalho são: verificar a relação entre a pressão da corrente de alimentação e o tempo de ciclo com a pureza e a quantidade produzida de O2 e, assim, identificar qual cenário, entre os simulados, é o mais vantajoso, além de poder auxiliar novos trabalhos em relação ao uso do software Aspen Adsorption para o processo PSA Abstract: Pressure Swing Adsorption (PSA) process is a cyclic adsorption process that can be used to obtain oxygen-enriched stream, O2, with the use of certain zeolites. Feed stream pressure and cycle time exert great influence on both purity and quantity of the desired product. Therefore, due to the importance and high demand for O2 in different segments, such as steelmaking, healthcare and water and wastewater treatment, the study of alternative techniques to cryogenic distillation, the main form of gas production, should be stimulated, both experimentally and computationally. Thereby the objective of this work is to study computationally, with Aspen Adsorption, the PSA process for oxygen-enriched stream production, with purity between 90 and 93 % V/V, considering feed stream with composition analogous to atmospheric air (79% N2, 20 % O2 and 1 % Ar, volumetric basis). The pressures of 4.5, 6.5 and 8.5 bar and cycle times of 60, 120 and 240 seconds were evaluated, the latter restricted to the scenario of higher pressure, in a spreadsheet with two adsorption beds, packaged with 5A zeolite, one of which was represented by the bed repetition resource, offered by the software. With the progressive reduction of feed stream pressure, a decrease in the amount of O2 stored after the adsorption beds was observed, which was already expected. Only in the scenarios of 8.5 and 6.5 bar, 60 seconds, and 4.5 bar, 120 and 60 seconds, the desired purity was not achieved. For the 8.5 bar scenario, the cycle time of 120 seconds was the most appropriate; the cycle time of 240 seconds, in comparison, caused the responses of the unit to slow down (longer time interval is required to reach a certain value), but the values obtained for purity and stored amount of O2 were analogous; the 60-second scenario failed to reach the desired pressure of 8.5 bar, nor the stipulated value for purity. It is emphasized that, in all scenarios, there was no change in valve configuration. Finally, the main contributions of this work are to verify the relationship between feed stream pressure and cycle time with the purity and the quantity produced of O2 and, thus, to identify which scenario, among the simulated, is the most advantageous one, besides contributing to new projects in relation to Aspen Adsorption use for PSA process simulation Mestrado Engenharia Química Mestre em Engenharia Química CNPQ 130491/2020-9
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- 2022
243. Proposal of new subjects for the chemical engineering course
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Ramos, Anderson Tadeu Silva, 1987, Lisbôa, Antônio Carlos Luz, 1954, Zemp, Roger Josef, Costa, Marcello Nitz da, Universidade Estadual de Campinas. Faculdade de Engenharia Química, Programa de Pós-Graduação em Engenharia Química, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Engenharia química - Ensino ,Flowsheets ,Chemical engineering - Education ,Fluxogramas - Abstract
Orientador: Antonio Carlos Luz Lisbôa Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química Resumo: O Engenheiro Químico no início de carreira se depara com vários desafios. Após conquistar uma vaga de Trainee ou Engenheiro Júnior em uma empresa, o egresso do curso de engenharia entra em contato com problemas e demandas que exigem conhecimentos não estudados na universidade. Essa experiência foi vivenciada pelo Autor e serviu de motivação para este trabalho, com o propósito de aproximar academia e indústria por meio da educação. O objetivo central foi propor novas disciplinas para o curso de Engenharia Química, com temas relevantes para o engenheiro que inicia sua carreira nas áreas de projetos, processos químicos ou produção para o setor industrial. Por meio de revisão bibliográfica, experiências do Autor, pesquisa de vagas e estudo da legislação do Ministério da Educação foi possível verificar as competências esperadas para o egresso do curso de engenharia e identificar os conteúdos exigidos pelo mercado de trabalho. Duas relações foram geradas para mostrar a importância dos temas propostos neste estudo. Na sequência foram elaborados quatro planos de ensino e seus respectivos planejamentos de aulas para as disciplinas de desenvolvimento de fluxogramas, utilidades industriais, normas técnicas para Engenharia Química e engenharia de produto. Essas disciplinas foram classificadas como obrigatórias e poderiam ser oferecidas no final do curso de graduação. As análises e conclusões finais mostraram que é possível implementar as quatro disciplinas em um curso de Engenharia Química por meio da atuação do Núcleo Docente Estruturante Abstract: The Chemical Engineer at the beginning of his career is faced with several challenges. After conquering a position as a Trainee or Junior Engineer in a company, the engineering graduate comes into contact with problems and demands that require knowledge not studied at university. This experience was lived by the author and served as a motivation for this work, with the purpose of bringing school and industry together through education. The main objective was to propose new disciplines for the Chemical Engineering course, with relevant themes for the engineer who starts his career in the areas like design, chemical processing or production for the industrial sector. By means of a literature review, the Author's experiences, an available position survey and a study of the legislation of the Brazil Education Ministry, it was possible to verify the competencies expected for the graduate of the engineering course and to identify the contents demanded by the job market. Two relations were generated to show the importance of the themes proposed in this study. Next, subjects and their syllabus were drawn up for four disciplines: flowchart development, industrial utilities, technical norms for Chemical Engineering and product engineering. These subjects were classified as required and could be offered at the end of the undergraduate course. The analyses and final conclusions showed that it is possible to implement the four disciplines in a Chemical Engineering course through the actions of the structuring teaching nucleus Mestrado Engenharia Química Mestre em Engenharia Química CAPES 33003017034P-8
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- 2022
244. Effect of operating conditions on scrap tire pyrolysis
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Carla Fabiana Scatolim Rombaldo, Antonio Carlos Luz Lisbôa, Manoel Orlando Alvarez Méndez, and Aparecido dos Reis Coutinho
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scrap tire ,pyrolysis ,activated carbon ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
The ever growing focus on environmental issues has raised concerns about scrap tires, whose major component - vulcanized rubber - does not degrade easily. When burned, tires release toxic gases containing substantial amounts of sulfur and ammonia in addition to other pollutants. Dumped on empty city lots, tires are also a breeding ground for mosquitoes. Many proposals have been put forward to handle the disposal of scrap tires, but none of them have proved to offer a definitive solution. The study reported here investigated the production of fuel oil and activated carbon from the pyrolysis of scrap tires. The initial mass of rubber yielded approximately 46% of oil, 40% of activated carbon and 14% of gases. The resulting activated carbon displayed a specific surface area of 200 m².g-1.
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- 2008
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245. A crise do poder e da obediência na vida religiosa consagrada feminina: uma abordagem psicossocial e político-religiosa
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Ferreira, Luzia Valladão, Marques, Luiz Carlos Luz, Menezes, Anderson de Alencar, Souza, José Tadeu Batista de, and Cabral, Newton Darwin de Andrade
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Psychology and religion ,Catholicism ,Psicologia e religião ,Subjectivity ,Catolicismo ,TEOLOGIA [CIENCIAS HUMANAS] ,Theses ,Christianity ,Subjetividade ,Cristianismo ,Vow of obedience ,Authority - Religious aspects ,Autoridade - Aspectos religiosos ,Teses ,Voto de obediência - Abstract
Submitted by Biblioteca Central (biblioteca@unicap.br) on 2022-06-14T18:26:14Z No. of bitstreams: 2 Ok_luzia_valladao_ferreira.pdf: 1468094 bytes, checksum: 9ab1af8402881f404ceab0a952ed4b54 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2022-06-14T18:26:14Z (GMT). No. of bitstreams: 2 Ok_luzia_valladao_ferreira.pdf: 1468094 bytes, checksum: 9ab1af8402881f404ceab0a952ed4b54 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2021-12-15 This thesis reflects about power and obedience in Consecrated Women’s Religious Life and its bond with Christian service according to the principles of co-responsibility at psychosocial and political-religious levels. The object of the research is the reflection on how the obstacles happen and the causes that can generate crises, conflicts or difficulties in managing a community of consecrated religious. In this sense, it deals with fundamentals about the formation of subjectivities focusing on the figure of the woman with her vulnerabilities; of theological presuppositions on the doctrine of the Catholic Church on the vow of obedience; the need for technical skill for leaders; in addition to confronting with the lay world, the perception of how crises are experienced in the conventual environment. As a specific group incorporated into religious world, part of Catholic Christianity, life and work, both with a single sense have a transcendent meaning. Having experienced this situation and felt the difficulties of convent management, my interest in the subject arose. Everything experienced in this context is permeated with symbologies that exercise power, sometimes without a clear perception of some of the participants, including those who exercise power or authority. In developing this thesis, questions were anchored in Pierre Bourdieu’s theory on symbolic violence, present in different fields. Co-responsibility is a important fator among the members or the community, but it derives from the well -or poorly- formed subjectivities and/or technical unpreparedness of managers. Thus, in the view of different authors such as Anthony Giddens, Lev Vygotsky, Soren Kierkegaard, and others, attention was paid to the formation of subjectivities with sociological, psychopedagogical and philosophical approaches, in convergence with Bourdieu’s thought. By applying the qualitative methodology, interviews brought to light the practice experienced in the exercise of leadership, revealing it close to or far from what is considered “ideal”. Twelve sisters, missionaries in Northeast Brazil, from different communities were interviewed. The data collected and confirmed by the interviewees were categorized an analyzed, taking into account the conventual structure. Specific formation, goas, difficulties and overcoming were examined as constituents of the exercise in canonical leadership and revealed experienced crises capable, however, of emanating patience, understanding and humility. Bourdieu’s theory offers elements for the understanding of the phenomenon, present in this social field (locus numinosum), permeated by mental structures (habitus), forming beliefs that are structured as indisputable (doxa), called by him as symbolic violence. From this perspective, as a result, we detect that crises are natural to consecrated religious life, such as crises of power and obedience. However, they are different from those of lay organizations because subjectivities are induced to “sublimate” conflicts and differences, which brings humility, resignation, service, obedience, submission. Esta tese reflete acerca do poder versus obediência na Vida Religiosa Consagrada Feminina e sua relação com a vivência do poder como serviço cristão à luz dos princípios da corresponsabilidade em níveis psicossociais e político-religiosos. O objeto da pesquisa é a reflexão de como se processam os entraves, e suas possíveis razões, geradores de crises, conflitos ou dificuldades em gerir comunidade de religiosas consagradas. Neste sentido, versa sobre a formação das subjetividades, com enfoque na figura da mulher com suas vulnerabilidades; de pressupostos teológicos da doutrina da Igreja Católica sobre o voto da obediência; da necessidade de preparo técnico para lideranças; além de confrontar, com o mundo laical, a percepção de como crises são vivenciadas na esfera conventual. Em se tratando de um grupo específico, incorporado ao mundo religioso, integrante do cristianismo católico, vida e trabalho, ambos com acepção única, têm sentido transcendente. Por ter experenciado essa conjuntura e sentido as dificuldades da gestão conventual, surgiu o interesse pela temática. Todo contexto vivenciado nesse campo é permeado de simbologias que exercem poder, por vezes, sem uma clara percepção de alguns dos participantes, inclusive por quem exerce o poder. No desenvolver desta tese, questões foram ancoradas na teoria de Pierre Bourdieu sobre a violência simbólica, presente em campos diversos. A corresponsabilidade é fator primordial, mas deriva das subjetividades bem ou mal formadas e/ou despreparo técnico das gestoras assim como das demais integrantes da comunidade. Assim, na visão de autores diversos com Anthony Giddens, Lev Vygostsky, Sören Kierkegaard e outros, foi dada atenção à formação das subjetividades com abordagens sociológicas, psicopedagógicas e filosóficas, em convergência com o pensamento de Bourdieu. Pela aplicação da metodologia qualitativa, entrevistas trouxeram à tona a prática vivenciada no exercício da liderança, revelando-a próxima ou distante do considerado “ideal”. Doze religiosas, missionárias no Nordeste brasileiro, de comunidades diversas, participaram das entrevistas. Os dados coletados e confirmados pelas entrevistadas foram categorizados e analisados apreciando-se a estrutura conventual. Formação específica, metas, dificuldades e superação foram examinadas como constituintes do exercício da liderança canônica e revelaram crises vivenciadas capazes, no entanto, de emanar paciência, compreensão e humildade. A teoria de Bourdieu oferece elementos para o entendimento do fenômeno ao tratar das violências simbólicas que ocorrem neste campo social (locus numinoso), permeado de estruturas mentais (habitus), formando crenças as quais se estruturam como indiscutíveis (doxa). Nessa perspectiva, como resultado, detectamos o que diferencia a crise de poder e obediência, de natural manifestação na vida religiosa consagrada, conquanto nela, ao contrário das organizações laicais, as subjetividades são induzidas a “sublimar” conflitos e diferenças, ensejando humildade, resignação, serviço, obediência, submissão.
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- 2021
246. Instituições de ensino superior católicas: ainda tem sentido? Percepção e aceitação de alunos da cidade do Recife-PE
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Torres, Maria de Fátima da Nóbrega, Correia Júnior, João Luiz, Marques, Luiz Carlos Luz, Chaves, José Afonso, Souza, José Roberto de, and Araújo, Sandra Helena Rios de
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Universidades e faculdades católicas ,Catholic church ,Igreja Católica ,Teses ,Catholic Universities and Colleges ,TEOLOGIA [CIENCIAS HUMANAS] ,University education ,Theses ,Ensino superior - Abstract
Submitted by Biblioteca Central (biblioteca@unicap.br) on 2022-01-10T17:44:58Z No. of bitstreams: 2 Ok_fatima_nobrega_torres.pdf: 2376722 bytes, checksum: e470eb3da9226b51794941e1f642ce8a (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2022-01-10T17:44:58Z (GMT). No. of bitstreams: 2 Ok_fatima_nobrega_torres.pdf: 2376722 bytes, checksum: e470eb3da9226b51794941e1f642ce8a (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2021-09-20 The demands of the current job market have led to a culture of efficiency and productivity, which require from universities an excessive attention to the intellectual capacity of the student. However, there are institutions that were not intimidated by this new scenario; among them, Catholic Higher Education Institutions (CHEIs) that, due to their religious nature, seek to keep their pedagogical-Christian mission alive with the purpose of offering integral training to its students considering, in addition to their intellectual dimension, the moral, spiritual, and religious ones, awakening in them a humanistic essence. Nevertheless, the present scenarios have revealed many challenges to carry out a mission of this nature, leading to the question of whether this purpose still makes sense. Following the trajectory of Church´s relationship with the education of Antiquity until nowadays and deepening the studies on the mission of ( CHEIs) and the challenges faced by these institutions, it was possible to elaborate the thesis that the students surveyed perceive the pedagogical-Christian mission of their Catholic Higher Education Institution, as well as accept this mission for the present day, which would confirm that it makes sense to maintain a mission such as the one proposed by the CHEIs.Thus, as a way of contributing to this discussion, this study aimed to learn about the perception and acceptance of students from Catholic Higher Education Institutions regarding the pedagogical-Christian mission of their institution today. The work is constituted of the introduction and the following four chapters being three the form the theoric framework with quotes of authors in the field of education as Manacorda, Luzuriaga and Nunes,in addition to others who study the mission of CHEIs as Miranda and Juliatto. The study is characterized as exploratory-descriptive and was carried out with 302 students from three CHEIs in Recife. The results of the research confirm the thesis proposed above and feed the hope that, even in the face of a culture of materialism, it is possible to promote the integral development of students, a quality so necessary in contemporary society. As exigências do mercado de trabalho têm levado a uma cultura de eficiência e produtividade, cobrando das universidades uma atenção excessiva à capacitação intelectual do aluno. Por outro lado, existem instituições que não se intimidaram diante desse novo cenário. Entre elas, estão as Instituições de Ensino Superior Católicas (IESCs), as quais, por sua natureza religiosa, procuram manter viva a sua missão pedagógica sem descuidar da formação humanista de seus alunos que tem o propósito de oferecer uma formação integral onde é considerado, além do desenvolvimento da dimensão intelectual, as dimensões moral, espiritual e religiosa dos alunos, despertando neles uma essência humanista. Entretanto, os cenários presentes têm revelado muitos desafios quando se trata de levar adiante uma missão dessa natureza, despertando a indagação sobre se ainda tem sentido esse propósito. Seguindo a trajetória da relação da Igreja com a educação da Antiguidade até os dias atuais e aprofundando mais os estudos sobre a missão das IESCs e os desafios enfrentados por essas instituições, foi possível elaborar a tese de que os alunos pesquisados percebem a missão pedagógico-cristã de sua Instituição de Ensino Superior Católica, como também aceitam essa missão para a atualidade o que confirmaria que tem sentido manter uma missão como a proposta pelas IESCs. Assim, como forma de contribuir para essa discussão, esse estudo tem o objetivo de conhecer a percepção e a aceitação de alunos de Instituições de Ensino Superior Católicas sobre a missão pedagógico-cristã de sua instituição para confirmar ou não a tese aqui proposta. O trabalho é composto pela introdução, seguida de quatro capítulos, sendo três que formam o arcabouço teórico do estudo com colocações de autores da área da educação como Manacorda, Luzuriaga e Nunes, além de outros que abordam em seus estudos a missão das IESCs como Miranda e Juliatto. O estudo se caracteriza como exploratório-descritivo e foi realizado com 302 alunos de três IESCs da cidade do Recife. Os resultados da pesquisa confirmam a tese proposta acima e alimentam a esperança de que é possível, mesmo diante de uma cultura materialista, promover o desenvolvimento integral dos alunos, qualidade tão necessária na sociedade contemporânea.
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- 2021
247. Modelagem e simulação do processo de secagem dos frutos de aroeira-vermelha (Schinus terebinthifolius Raddi)
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Silva, Bruno Guzzo da, 1988, Fileti, Ana Maria Frattini, 1965, Lisbôa, Antônio Carlos Luz, Porto, Paulo Sérgio da Silva, Universidade Estadual de Campinas. Faculdade de Engenharia Química, Programa de Pós-Graduação em Engenharia Química, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Frutas - Secagem ,Brazilian pepper tree - Drying ,Redes neurais (Computação) ,Secagem ,Frutas - Conservação ,Fruit - Drying ,Fruit - Preservation - Drying ,Neural networks (Computer) ,Drying - Abstract
Orientador: Ana Maria Frattini Fileti Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química Resumo: A pimenta-rosa, produzida a partir dos frutos da aroeira-vermelha (Schinus terebinthifolius Raddi), é um dos mais sofisticados condimentos da culinária internacional e que vem apresentando um aumento na sua demanda. No entanto, na literatura encontram-se poucos estudos sobre o seu processamento, em que a secagem é uma etapa indispensável e que ainda é realizada de forma empírica. Nas empresas beneficiadoras, a etapa de secagem tem por finalidade aumentar a vida de prateleira do produto, além de agregar valor aos frutos da aroeira-vermelha. Neste contexto, este trabalho teve por objetivo realizar investigações no processo de secagem de frutos de aroeira-vermelha, focando principalmente no estudo de modelos matemáticos para a simulação do processo. As amostras de frutos de aroeira-vermelha, utilizadas nos ensaios de caracterização e secagem, foram classificadas manualmente e reumidificadas artificialmente. Para a caracterização do sistema particulado, os seguintes parâmetros foram determinados: teor de umidade em base seca; diâmetro médio e massa específica aparente dos frutos; e massa específica e porosidade do leito de frutos. Também foram determinadas, através do método estático, as isotermas de dessorção de umidade dos frutos em temperaturas de 30, 50 e 70 ºC. Um Delineamento Composto Central Rotacional (DCCR) com 11 experimentos foi desenvolvido e foram investigadas as influências da temperatura (40 a 70 ºC) e da velocidade do ar de secagem (0,4 a 0,8 m/s) no processo. Em cada um dos ensaios do DCCR foram analisadas a cinética de secagem e a curva de taxas de secagem dos frutos de aroeira-vermelha. Os modelos de difusão, de Lewis, de Henderson e Pabis, de Page modificado e de Henderson foram ajustados aos dados experimentais da cinética de secagem, sendo realizada a comparação destes modelos com um modelo fundamentado na Inteligência Artificial. Os resultados revelaram que, para as condições operacionais estudadas neste trabalho, a temperatura do ar de secagem apresenta uma influência maior no processo. A cinética de secagem ocorre principalmente no período de taxa decrescente. Isto indica que a secagem ocorre pela remoção da umidade interna do sólido. O modelo via Redes Neurais Artificiais (RNA's) e o modelo de Henderson apresentaram os resultados mais satisfatórios no ajuste aos dados da cinética de secagem dos frutos de aroeira-vermelha. No entanto, observou-se que a principal vantagem do modelo de RNA, em relação aos modelos clássicos, foi a sua generalidade. O modelo de RNA foi capaz de descrever uma série de experiências com precisão, enquanto que a aplicação de modelos clássicos foi limitada a uma experiência específica. Para o modelo neural, esta gama de condições experimentais pode ser expandida através da adição de novos conjuntos de experimentos de treinamento. Deste modo, os resultados satisfatórios da utilização de um modelo baseado em RNA's em processos de secagem indicam a potencialidade da aplicação desta ferramenta na modelagem de processos industriais de secagem Abstract: The pink pepper, produced from the Brazilian pepper-tree fruits (Schinus terebinthifolius Raddi), is one of the most sophisticated condiments of the international cuisine. The demand for pink pepper is increasing because it adds taste and refinement to international cuisine. Until now, rare are the studies that investigated the drying of Brazilian pepper?tree fruits. In the processing companies, the process is carried out empirically and the drying operation is an important step. The Brazilian pepper?tree fruits are dried to inhibit microbial development and quality decay. Another benefit of drying is a reduction in weight. In this context, this study aimed to perform investigations in the drying process of Brazilian pepper?tree fruits, focusing mainly in the study of mathematical models to simulate drying kinetics. Before each test, the fruits were sorted manually and humidified artificially. In this study, physical characterization of Brazilian pepper?tree fruits was obtained by evaluating the moisture content on dry basis; mean diameter and apparent density; bulk density and porosity. The moisture sorption isotherm, at temperatures of 30, 50 and 70 ºC, were determined by the static method. A Central Composite Rotable Design (CCRD) with 11 experiments was developed. In each experiment, the drying kinetics and the drying rate were investigated, as well as the influence of input variables on the drying process. Classical models were fitted to the drying data, as well as a model based on Artificial Intelligence. In the operating conditions of this study, the results revealed that the air temperature has a greater influence on the thin layer drying process of Brazilian pepper?tree fruits. The drying kinetics occurs mainly in the falling-rate period of drying. This indicates that drying occurs mainly by removal of internal moisture of the solid. The artificial neural network model and the Henderson model fitted to the experimental data more accurately in comparison to the various mathematical models. However, it was observed that the main advantage of the artificial neural network model over classical models was their generality. The ANN model was able to describe a range of experiments accurately, while the application of classical models is limited to a specific experiment. For the neural model, this range of experimental conditions may be expanded by addition of new sets of experiments in training Mestrado Sistemas de Processos Químicos e Informática Mestre em Engenharia Química
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- 2021
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248. Controle avançado de um reator quimico de leito fixo
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Guerra, Carlos Alexandre Lourenço, Maciel Filho, Rubens, 1958, Lisbôa, Antônio Carlos Luz, Camarasa, Eric, Universidade Estadual de Campinas. Faculdade de Engenharia Química, Programa de Pós-Graduação em Engenharia Química, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Reatores quimicos - Controle automático - Abstract
Orientador: Rubens Maciel Filho Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica Resumo: A utilização de reatores catalíticos de leito fixo nas indústrias químicas, e a necessidade de otimização e controle dos mesmos, motivaram o estudo de modelos dinâmicos e técnicas de controle, como a utilização de controladores "FeedbackFeedforward", funcionando simultaneamente. Na prática, muitos sistemas de controle "feedforward" são implementados usando sistemas de controle "ratio". O controlador "feedforward" controla as grandes e freqüentes perturbações mensuráveis e o controlador "feedback" controla quaisquer desvios que ocorram no processo devido às imprecisões do controlador "feedforward" ou outras perturbações não mensuráveis, como as alterações internas devido à desativação de catalisador. O projeto inicial do controlador "Feedback-Feedforward" foi feito através de um modelo empírico de 23 ordem obtido pelo planejamento fatorial, que apresentou "offsets" na variável controlada, mas boa previsibilidade para a variável manipulada. A construção de um novo controlador Estatístico-PID foi sugerida, de forma a eliminar os problemas anteriores e aproveitar a previsibilidade do modelo empírico através de um modelo dinâmico utilizando a lei de controle do PID em seu algoritmo. Assim, obteve-se um melhor desempenho quando comparado somente ao controlador convencional tipo PID. As variáveis de controle e manipulação foram escolhidas através de uma análise do comportamento dinâmico do reator em malha aberta, as quais permitiram a manutenção ou obtenção de um novo estado estacionário desejado. Para esta análise das variáveis também foram utilizadas técnicas estatísticas, como o planejamento de experimentos fatorial, que mostrou seus efeitos e suas interações. Como caso estudo, será considerada a oxidação do etanol a acetaldeído tendo como catalisador o Fe-Mo, cujos dados operacionais são conhecidos. O comportamento dinâmico do reator catalítico de leito fixo será descrito pelo modelo proposto por Maciel Filho, 1989. O método de resolução consiste na aplicação do método das Linhas, utilizando-se uma combinação da colocação ortogonal (Villadsen & Michelsen, 1978) na direção radial com o método de Runge-Kutta de quarta ordem para a direção axial Abstract: The use of fixed bed catalytic reactors in the chemical industry, and the necessity of controlling and optimizing these reactors, have motivated the studies of dynamic models and control techniques, such as the use of Feedback-Feedforward controllers, working simultaneously. In practice, several feedforward control systems are implemented using ratio control systems. The feedforward controller controls the big and fi'equent perturbations and the feedback controller controls any deviation that occurs in the process due to the feedforward controller imprecision, or other non-measurable perturbations, such as internal modifications due to catalyst deactivation. The first "Feedback-Feedforward" controIler design was done using a 2nd order empirical model obtained fi'om a factorial design that produced offsets in the controIled variable, but good predictability for the manipulated variable. The development of a new Statistical-PID controIler was suggested, to eliminate the problems of the first and take advantage of the predictability of the empirical model through a dynamic model using the PID controllaw in the algorithm. In this way, a better performance was obtained when compared only to the conventional controIler oftype PID. The control and manipulated variables were chosen through an analysis of the dynamic behavior of the reactor in open loop, which permits the maintenance or a new desired steady state. Statistical techniques, such as factorial planning experiments, were used for the analysis ofthese variables in order to obtain their effects and interactions. As case study, the oxidation of ethanol into acetaldehyde over Fe-Mo catalyst wiIl be considered. The dynamic behavior of the fixed bed catalytic reactor will be described by the model proposed by Maciel Filho, 1989. The solution method consists in the application ofthe Line Method, using the orthogonal collocation (Villadsen & Michelsen, 1978) in the radial direction with the fourth order Runge-Kutta in the axial direction Mestrado Desenvolvimento de Processos Químicos Mestre em Engenharia Química
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- 2021
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249. Estudo do processo de secagem de mamão formosa (Carica papaya L.) fresco e pre-tratado osmoticamente
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El-Aouar, Anoar Abbas, Murr, Fernanda Elizabeth Xidieh, 1952-2013, Lisbôa, Antônio Carlos Luz, Menegalli, Florência Cecília, Bolini, Helena Maria André, Park, Kil Jin, Luccas, Valdecir, Universidade Estadual de Campinas. Faculdade de Engenharia de Alimentos, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Desidratação osmótica ,Avaliação sensorial ,Mamão ,Papaya ,Osmotic dehydration ,Secagem ,Sensory analysis ,Drying - Abstract
Orientador: Fernanda Elizabeth Xidieh Murr Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos Doutorado Engenharia de Alimentos Doutor em Engenharia de Alimentos
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- 2021
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250. Modelagem e simulação de processo descontinuo de recobrimento de particulas em leito de jorro
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Paulo Filho, Mario, Rocha, Sandra Cristina dos Santos, 1957, Lisbôa, Antônio Carlos Luz, 1954, Zanoelo, Everton Fernando, Silva, Maria Aparecida, Taranto, Osvaldir Pereira, Oliveira, Wanderley Pereira de, Universidade Estadual de Campinas. Faculdade de Engenharia de Campinas, Programa de Pós-Graduação em Engenharia Química, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Particles coating ,Processo de leito de jorro ,Revestimentos ,Modeling and simulation ,Spouted bed ,Polydispersed particles ,Modelagem de dados ,Simulação (Computadores) - Abstract
Orientador: Sandra Cristina dos Santos Rocha, Antonio Carlos Luz Lisboa Tese (doutorado) - Univesidade Estadual de Campinas, Faculdade de Engenharia de Campinas Resumo: Resumo: A técnica do leito de jorro apresenta larga utilização nos processos de recobrimento de partículas sólidas, para se obter produtos com propriedades superficiais modificadas, em setores industriais como o agrícola, farmacêutico e de alimentos. Neste trabalho, utilizou-se modelagem matemática e simulação numérica em processo de recobrimento por batelada, aplicando-se as equações do balanço populacional. Posteriormente, o sistema de equações diferenciais obtido foi resolvido pelo método numérico de Runge-Kutta-Fehlberg, utilizando-se software Maple '8 POT. Marca registrada¿. Para a verificação dos resultados da simulação foram obtidos dados experimentais, em escala de laboratório, em um equipamento que consiste em um leito cone-cilíndrico, com um bico atomizador conectado, acoplado a um conjunto soprador e aquecedor de ar. Uma carga de partículas tipo esfera de vidro polidispersas, preparadas a partir da mistura de lotes de partículas de diversos tamanhos, foi colocada no leito de jorro, onde um bico atomizador pulveriza uma suspensão aquosa à base de hidroxietilcelulose. Um planejamento experimental, totalizando 11 experimentos, foi definido variando-se a temperatura do ar de jorro, vazão da suspensão de recobrimento e pressão do ar de atomização. Como variáveis de resposta, foram obtidas as taxas de crescimento das partículas e a eficiência do processo. Foram consideradas variáveis significativas do processo a vazão de suspensão e a temperatura do ar... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital Abstract: Abstract: Spouted beds present large utilization in solid particles coating, to obtain products with modified superficial properties, in fields agricultural, pharmaceutical and food industry. In this work a mathematical model and its numerical simulation were developed to simulate batch coating processes, applying population balance equations. The system of differential equations obtained was solved by Runge-Kutta-Fehlberg method using Maple '8 POT. Marca registrada¿ software. In order to verify the simulation results, a series of experimental data was carried out, at a lab scale, using a rig that consisted of a cylindrical bed with an atomizer nozzle; attached to the system there were a blower and an air heater. A batch of polydispersed glass beads was introduced into the bed, where the atomizer nozzle pulverized a hydroxiethilcelullose based aqueous suspension. An experimental planning, totaling 11 experimental runs, was designed to vary the spouted air temperature, coating suspension flow rate and atomization air pressure. The growth rate and process efficiency were chosen as dependent variables. Air temperature, suspension mass flux and atomization air pressure were considered as significant variables. The values of growth rate obtained experimentally were compared to the simulated results. A good agreement was verified with small deviations between the experimental and simulated data... Note: The complete abstract is available with the full electronic digital thesis or dissertations Doutorado Engenharia de Processos Doutor em Engenharia Química
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- 2021
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