Astronomy and beginning astrophysics

Mode of access: Internet.

Comedias escogidas de Frey Lope Felix de Vega Carpio.

Contiene: Vol. 1: La hermosa fea. Por la puente Juana (216 p.) -- Vol. 2: Al pasar del arroyo. El perro del hortelano (217-489 p.)

Ragionamento di Monsignor Giambattista Canaveri vescovo di Biella alli parrochi della diocesi radunati nel santuario di Graglia per li esercizii spirituali li 24. agosto dell'anno cristiano 1803.

Mode of access: Internet.

Memoirs of Lady Fanshawe, wife of Sir Richard Fanshawe, bt., embassador from Charles II. to the courts of Portugal & Madrid, written by herself: containing extracts from the correspondence of Sir Richard Fanshawe; ed.,

"The letters from which part of the following extracts have been taken, were printed in 1701, under the title of 'Original letters of His Excellency Sir Richard Fanshawe, during his embassies in Spain and Portugal.'"

Q. Horatii Flacci opera : ad mss. codices Vaticanos, Chisianos, Angelicos, Barberinos, Gregorianos, Vallicellanos, aliosque, plurimis in locis emendavit, notisque illustravit praesertim in iis, quae Romanas antiquitates spectant /

Includes index.

L'integrità del Panteon rivendicata a Marco Agrippa /

Includes index.

Annotazioni alla memoria sui diritti del principato sugli antichi edifizj publici sacri e profani /

Includes bibliographical references.

Teatro escogido de Lope de Vega,

Los milagros del desprecio.--La esclava de su galan.--El premio del bien hablar.--El mayor imposible.--La hermosa fea.--Por la puente, Juana.--Al pasar del arroyo.--El perro del hortelano.--Las flores de Don Juan, y Rico y pobre trocados.--Si no vieran las mugeres!--La boba para los otros y discreta para sí.--Las bizarrías de Belisa.--Lo que ha de ser.--El molino.--La dama melindrosa.--Los locos de Valencia.--El honrado hermano.--El acero de Madrid.--El Nuevo mundo descubierto por Cristóval Colon.--Los enredos de Celauro.

A new relaxation method for roll forming problems

Finite element analysis (FEA) of nonlinear problems in solid mechanics is a time consuming process, but it can deal rigorously with the problems of both geometric, contact and material nonlinearity that occur in roll forming. The simulation time limits the application of nonlinear FEA to these problems in industrial practice, so that most applications of nonlinear FEA are in theoretical studies and engineering consulting or troubleshooting. Instead, quick methods based on a global assumption of the deformed shape have been used by the roll-forming industry. These approaches are of limited accuracy. This paper proposes a new form-finding method - a relaxation method to solve the nonlinear problem of predicting the deformed shape due to plastic deformation in roll forming. This method involves applying a small perturbation to each discrete node in order to update the local displacement field, while minimizing plastic work. This is iteratively applied to update the positions of all nodes. As the method assumes a local displacement field, the strain and stress components at each node are calculated explicitly. Continued perturbation of nodes leads to optimisation of the displacement field. Another important feature of this paper is a new approach to consideration of strain history. For a stable and continuous process such as rolling and roll forming, the strain history of a point is represented spatially by the states at a row of nodes leading in the direction of rolling to the current one. Therefore the increment of the strain components and the work-increment of a point can be found without moving the object forward. Using this method we can find the solution for rolling or roll forming in just one step. This method is expected to be faster than commercial finite element packages by eliminating repeated solution of large sets of simultaneous equations and the need to update boundary conditions that represent the rolls.

SANTA MARIA FÉA E O CULTO POPULAR: ANÁLISE DA DIVULGAÇÃO DE MILAGREIROS PELA MÍDIA IMPRESSA LOCAL.

Estudo sobre a cobertura pela mídia de assuntos relacionados à personagem Maria Féa, considerada santa não-canônica, no período de 1994 a 2004. O objetivo foi analisar as manifestações (ex-votos) atribuídas ao credo a essa personagem, a divulgação de assuntos sobre a personagem em jornal local, além de fazer um resgate histórico do caso a partir da mídia impressa local. Tanto quanto um meio de comunicação, as manifestações de religiosidade popular podem ser consideradas formas de comunicação e a divulgação destes cultos nãocanônicos (a santos ainda não canonizados) pela mídia contribui para a continuidade destes eventos. A metodologia utilizada engloba uma série de procedimentos relativos a pesquisa bibliográfica e documental, a análise de conteúdo de veículos de mídia impressa, entrevistas semi-estruturadas e observação participante. Conclui-se que a mitificação popular com relação à Maria Fea é resultado de um grupo de fatores como a divulgação pela mídia do histórico do crime, a divulgação pela comunicação oral dos feitos espetaculares atribuídos à personagem pelos devotos, e os objetos deixados como ex-votos que comprovam seu status de santa . No caso da mídia, esta abastece seu público com elementos, como textos e fotos, que validam as várias versões sobre a personagem.(AU)

UMA ANÁLISE DA RELAÇÃO ENTRE VARIÁVEIS MACROECONÔMICAS E O COMPORTAMENTO DAS AÇÕES DE MAIOR LIQUIDEZ DO ÍNDICE IBOVESPA

As ações de maior liquidez do índice IBOVESPA, refletem o comportamento das ações de um modo geral, bem como a relação das variáveis macroeconômicas em seu comportamento e estão entre as mais negociadas no mercado de capitais brasileiro. Desta forma, pode-se entender que há reflexos de fatores que impactam as empresas de maior liquidez que definem o comportamento das variáveis macroeconômicas e que o inverso também é uma verdade, oscilações nos fatores macroeconômicos também afetam as ações de maior liquidez, como IPCA, PIB, SELIC e Taxa de Câmbio. O estudo propõe uma análise da relação existente entre variáveis macroeconômicas e o comportamento das ações de maior liquidez do índice IBOVESPA, corroborando com estudos que buscam entender a influência de fatores macroeconômicos sobre o preço de ações e contribuindo empiricamente com a formação de portfólios de investimento. O trabalho abrangeu o período de 2008 a 2014. Os resultados concluíram que a formação de carteiras, visando a proteção do capital investido, deve conter ativos com correlação negativa em relação às variáveis estudadas, o que torna possível a composição de uma carteira com risco reduzido.

A sensitivity study of the human crystalline lens using finite element analysis

Finite element analysis is a useful tool in understanding how the accommodation system of the eye works. Further to simpler FEA models that have been used hitherto, this paper describes a sensitivity study which aims to understand which parameters of the crystalline lens are key to developing an accurate model of the accommodation system. A number of lens models were created, allowing the mechanical properties, internal structure and outer geometry to be varied. These models were then spun about their axes, and the deformations determined. The results showed the mechanical properties are the critical parameters, with the internal structure secondary. Further research is needed to fully understand how the internal structure and properties interact to affect lens deformation.

Finite element analysis of particle impact problems

Particle impacts are of fundamental importance in many areas and there has been a renewed interest in research on particle impact problems. A comprehensive investigation of the particle impact problems, using finite element (FE) methods, is presented in this thesis. The capability of FE procedures for modelling particle impacts is demonstrated by excellent agreements between FE analysis results and previous theoretical, experimental and numerical results. For normal impacts of elastic particles, it is found that the energy loss due to stress wave propagation is negligible if it can reflect more than three times during the impact, for which Hertz theory provides a good prediction of impact behaviour provided that the contact deformation is sufficiently small. For normal impact of plastic particles, the energy loss due to stress wave propagation is also generally negligible so that the energy loss is mainly due to plastic deformation. Finite-deformation plastic impact is addressed in this thesis so that plastic impacts can be categorised into elastic-plastic impact and finite-deformation plastic impact. Criteria for the onset of finite-deformation plastic impacts are proposed in terms of impact velocity and material properties. It is found that the coefficient of restitution depends mainly upon the ratio of impact velocity to yield Vni/Vy0 for elastic-plastic impacts, but it is proportional to [(Vni/Vy0)*(Y/E*)]-1/2, where Y /E* is the representative yield strain for finite-deformation plastic impacts. A theoretical model for elastic-plastic impacts is also developed and compares favourably with FEA and previous experimental results. The effect of work hardening is also investigated.

Modelling the human accommodation system using finite element analysis

The human accommodation system has been extensively examined for over a century, with a particular focus on trying to understand the mechanisms that lead to the loss of accommodative ability with age (Presbyopia). The accommodative process, along with the potential causes of presbyopia, are disputed; hindering efforts to develop methods of restoring accommodation in the presbyopic eye. One method that can be used to provide insight into this complex area is Finite Element Analysis (FEA). The effectiveness of FEA in modelling the accommodative process has been illustrated by a number of accommodative FEA models developed to date. However, there have been limitations to these previous models; principally due to the variation in data on the geometry of the accommodative components, combined with sparse measurements of their material properties. Despite advances in available data, continued oversimplification has occurred in the modelling of the crystalline lens structure and the zonular fibres that surround the lens. A new accommodation model was proposed by the author that aims to eliminate these limitations. A novel representation of the zonular structure was developed, combined with updated lens and capsule modelling methods. The model has been designed to be adaptable so that a range of different age accommodation systems can be modelled, allowing the age related changes that occur to be simulated. The new modelling methods were validated by comparing the changes induced within the model to available in vivo data, leading to the definition of three different age models. These were used in an extended sensitivity study on age related changes, where individual parameters were altered to investigate their effect on the accommodative process. The material properties were found to have the largest impact on the decline in accommodative ability, in particular compared to changes in ciliary body movement or zonular structure. Novel data on the importance of the capsule stiffness and thickness was also established. The new model detailed within this thesis provides further insight into the accommodation mechanism, as well as a foundation for future, more detailed investigations into accommodation, presbyopia and accommodative restoration techniques.

Three-dimensional finite element analysis of the effects of anisotropy on bone mechanical properties measured by nanoindentation

A three-dimensional finite element analysis (FEA) model with elastic-plastic anisotropy was built to investigate the effects of anisotropy on nanoindentation measurements for cortical bone. The FEA model has demonstrated a capability to capture the cortical bone material response under the indentation process. By comparison with the contact area obtained from monitoring the contact profile in FEA simulations, the Oliver-Pharr method was found to underpredict or overpredict the contact area due to the effects of anisotropy. The amount of error (less than 10% for cortical bone) depended on the indentation orientation. The indentation modulus results obtained from FEA simulations at different surface orientations showed a trend similar to experimental results and were also similar to moduli calculated from a mathematical model. The Oliver-Pharr method has been shown to be useful for providing first-order approximations in the analysis of anisotropic mechanical properties of cortical bone, although the indentation modulus is influenced by anisotropy.