Global ETD Search
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Showing 1 to 19 of 19 for “"Lemaitre"”.
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Modelagem de fratura dúctil em colisão de embarcações utilizando modelo de dano de Lemaitre modificado
… is to propose and assess a modification in Lemaitre’s damage model, called Model with Denominator of Damage Function (MDDF), for the prediction of the location and time instant of the material fracture initiation. The implementation of the proposed model, using the UMATs subroutines …
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Rendering dark energy void
The current model of cosmology, the Friedman-Lemaitre-Robertson-Valker model, assumes that the universe is approximately homogeneous and isotropic on very large scales. Further assuming flatness and dark energy in the form of Einstein's cosmological constant A then implies that the latter …
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Tanulmány a modern kozmológia valamely fejezetéből; a világegyetem fejlődése az effektív hurok-kvantumkozmológia szerint
… geometriája lapos, metrikája a Friedmann-Lemaitre-Robertson-Walker metrika és a Világegyetemet kitöltő anyag ideális folyadék. A Friedmann-egyenleteknek megoldásának részletes levezetése két speciális esetben, és ezen esetek általánosításában. A hurok-kvantumkozmológia effektív elméletéről …
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Cosmological magnetogenesis
… treated as small perturbations of a Friedmann-Lemaitre-Robertson-Walker (FLRW) background.
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Aspects of a spherically symmetric model of the post-decoupling universe
… to consider aspects of the spherically symmetric Lemaitre-Tolman-Bondi (LTB) solution as a model of the post-decoupling universe. To do this comprehensively is a massive task and is not our aim here. Indeed, far from it, we will concentrate on select instances of this programme and attempt in some …
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Defining gravitational singularities in general relativity
… several different spacetimes, including Friedman-Lemaitre-Robertson-Walker, Schwarzschild, self-similar Vaidya, self-similar Tolman-Bondi, non-self-similar Vaidya, and Kerr spacetimes. We find that in every case studied, the integral curves have specific end points, therefore they can be used to …
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Constructing realistic Szekeres models from initial and final data
… the three which are common to both Szekeres and Lemaitre-Tolman models are determined by the model construction procedure of Krasinski & Hellaby. For the remaining three functions, which are unique to Szekeres models, we derive exact analytic expressions in terms of more physically intuitive …
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A covariant approach to gravitational lensing
… area-distance relations in an Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmological model. We also use the NGDE in deriving a covariant form of the angle of deflection, showing its versatile applications in gravitational lensing theory.
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The influence of structure formation on the evolution of the universe
… celestial sphere. We concentrate on Friedmann-Lemaitre-Robertson-Walker spacetime with small perturbation up to non-linear order . This enables us to quantify by how much this effect could change the standard model interpretation of the universe. We study in great detail key parameters of the …
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What is the experience of relational depth for group psychotherapists in process-oriented groups?
This study explores the lived experiences of relational depth among group psychotherapists in long-term, process-oriented groups using van Manen’s hermeneutic phenomenological approach. While relational depth has been extensively researched in individual therapy, there is a notable lack of …
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Testing General Relativity with the next generation of cosmological surveys
… linear cosmological perturbations on Friedmann-Lemaitre-Robertson-Walker (FLRW) background, this are generally characterized by five free time-dependent functions αi (αB,αH,αK,αM,αT ) each describing different properties of unified dark energy physical outcome. The evolution equations for the …
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The Midwife's coracle: a phenomenological study of midwives' experiences of emotionally supporting motherhood.
… mother (Drift 2004), baby (Miller et al 1993, Lemaitre-Sillere 1998, McMahon et a1200l) and family (Burke 2003, Tammentie et al 2004a, Tammentie et al 2004b). This understanding led to an exploration of who might provide for the emotional health needs ofwomen at this time. Midwives were …
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Modulation of innate immunity by the cGMP signalling pathway in the drosophila malpighian tubule
… immune signalling pathways – Toll and Imd (Lemaitre et al. 1995a; Belvin and Anderson 1996). In Drosophila, a number of recent studies have identified a role for the diffusible second messenger nitric oxide (NO) in the positive regulation of the Imd pathway, a pathway that is fundamental to …
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Analisi teorica, numerica e sperimentale dei processi di grandi deformazioni nei materiali duttili
… damage model are analyzed in details: the the Lemaitre and Wierzbicki-Xue models. This choice was made to evaluate from different point of view the differences in the determination procedures of the material features along the deformation pattern. Both the models were implemented and tested …
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Spherically-symmetric inhomogeneities in general relativity and their effects in cosmology
… the tetrad-based method and the widely used Lemaitre-Tolman-Bondi (LTB) model for spherically-symmetric systems. We demonstrate that the tetrad-based method does not suffer from the gauge freedoms inherent to the LTB model, naturally accommodates non-zero pressure and has a more transparent …
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The Sachs-Wolfe effect
… SW effect in the case of a perturbed Friedman-Lemaitre-Robertson-Walker (FLRW) universe with a barotropic equation of state describing the matter in the unperturbed case. In our work we extend the example given by Panek for a flat universe (K = 0) filled with dust where the density …
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The gravitational field in a fluid sphere of uniform invariant density according, to the theory of relativity ; Note on de Sitter ̕Universe ; Note on the theory of pulsating stars
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1927.
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A multi-echelon supply chain model for strategic inventory assessment through the deployment of kanbans
As global competition in the manufacturing space grows, so do corporations' needs for sophisticated and optimized management systems to enable continuous flows of information and materials across the many tiers within their supply chains. With the complexities introduced by the variability in the …
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Simulations of Galaxy Formation and Large Scale Structure
… led to the postulation of the hot Big Bang by Lemaitre (1934). Zwicky (1933) found that most of matter in the Universe is dark. The nature of this matter, interacting only through gravity and perhaps through the weak interaction, is still a mystery. Finally, Penzias and Wilson (1965) discovered …