La rêverie comme expérience esthétique et spirituelle chez Jean-Jacques Rousseau

Le présent article propose une réflexion sur les multiples dimensions du concept de rêverie et sur les conditions entourant l’expérience esthétique telles qu’elles apparaissent dans Les Rêveries du promeneur solitaire. En filigrane, nous tentons également de positionner ce recueil dans la philosophie esthétique du siècle de Lumières. Au fond, la thèse centrale ici est que chez Rousseau la contemplation de la nature devient, dans les bonnes conditions, une expérience esthétique où l’imagination transpose l’esprit dans un état qui s’approche du mysticisme.

Utilisation of IIR Tube Reclaim for Developing NR/IIR Blends

Butyl (IIR) tube reclaim (RR) was mixed with carbon black filled natural rubber (NR) compounds at various percentages. The blend containing a low percentage of RR was found to show improved ageing resistance and improved processability with out much reduction in the mechanical properties.

Modification of Polychloroprene with Polyvinylchloride

Polychloroprene (neoprene) has been blended with polyvinylchloride (PVC) in different proportions using a new stabiliser system (magnesium oxide and zinc oxide with stearic acid) for PVC. The physical properties of the blends show that they can advantageously replace neoprene in many applications.

Polymer-Solvent Interaction Parameter for NR/SBR and NR/BR Blends

Polymer-solvent interaction parameters for the blends of natural rubber (NR) with styrene-butadiene rubber (SBR) and polybutadiene rubber ( BR) are calculated using the Flory-Rehner equation by equating the network density of the vulcanizates in two solvents.

Studies on the Cure Characteristics of Elastomer Blends

Blends of natural rubber (NR) with styrene-butadiene rubber (SBR), polybutadiene rubber (BR), ethylene-propylene terpolymer (EPDM) and acrylonitrile-butadiene rubber (NBR) were vulcanised using an efficient vulcanisation (EV) system and a semi-EV system. Compatible blends show a definite pattern of curing whereas the incompatible blends show no such pattern.

Studies on the Cure Characteristics and Vulcanizate Properties of 50/50 NR/BR Blend

A carbon black filled 50/50 Natural Rubber (NR)/Polybutadiene Rubber (BR) blend is vulcanized using several conventional systems designed by varying the amounts of sulphur and accelerator . The cure characteristics and the vulcanizate properties are compared. The quality and quantity of crosslinks in each case are deciphered by chemical probes to correlate them with the vulcanizate properties.

Scanning Electron Microscopy Studies on Tear and Wear Failure of Short Kevlar Fiber-Thermoplastic- Polyurethane Composite

Tear and wear properties of short kevlar fiber, thermoplastic polcurethane (TPU) composite with respect to fiber loading-and fiber onentation has been studied and the fracture surfaces were examined under scanning electron microscope (SEM). Tear strength first decreased up to 20 phr fiber loading and then gradually increased with increasing fiber loading. Anisotropy in tear strength was evident beyond a fiber loading of 20 phr. Tear fracture surface of unfilled TPU showed sinusoidal folding characteristics of high strength matrix. At low fiber loading the tear failure was mainly due to fibermatrix failure whereas at higher fiber loading the failure occurred by fiber breakage. Abrasion loss shows a continuous rise with increasing fiber loading, the loss in the transverse orientation of fibers being higher than that in the longitudinal orientation. The abraded surface showed lone cracks and ridges parallel to the direction of abrasion indicating an abrasive wear mechanism. In the presence of fber the abrasion loss was mainly due to fiber low.

Studies in quantum field theory at finite temperature

The thesis deals with certain quantum field systems exhibiting spontaneous symmetry breaking and their response to temperature. These models find application in diverse branches such as particle physics, solid state physics and non~linear optics. The nature of phase transition that these systems may undergo is also investigated. The thesis contains seven chapters. The first chapter is introductory and gives a brief account of the various phenomena associated with spontaneous symmetry breaking. The chapter closes with anote on the effect of temperature on quantum field systems. In chapter 2, the spontaneous symmetry breaking phenomena are reviewed in more detail. Chapter 3, deals with the formulation of ordinary and generalised sine-Gordon field theories on a lattice and the study of the nature of phase transition occurring in these systems. In chapter 4, the effect of temperature on these models is studied, using the effective potential method. Chapter 5 is a continuation of this study for another model, viz, the m6 model. The nature of phase transition is also studied. Chapters 5 and 6 constitute a report of the investigations on the behaviour of coupling constants under thermal excitation D1 $4 theory, scalar electrodynamics, abelian and non-abelian gauge theories

Studies on integrability of some perturbed nonlinear evolution equations

Usually typical dynamical systems are non integrable. But few systems of practical interest are integrable. The soliton concept is a sophisticated mathematical construct based on the integrability of a class ol' nonlinear differential equations. An important feature in the clevelopment. of the theory of solitons and of complete integrability has been the interplay between mathematics and physics. Every integrable system has a lo11g list of special properties that hold for integrable equations and only for them. Actually there is no specific definition for integrability that is suitable for all cases. .There exist several integrable partial clillerential equations( pdes) which can be derived using physically meaningful asymptotic teclmiques from a very large class of pdes. It has been established that many 110nlinear wa.ve equations have solutions of the soliton type and the theory of solitons has found applications in many areas of science. Among these, well-known equations are Korteweg de-Vries(KdV), modified KclV, Nonlinear Schr6dinger(NLS), sine Gordon(SG) etc..These are completely integrable systems. Since a small change in the governing nonlinear prle may cause the destruction of the integrability of the system, it is interesting to study the effect of small perturbations in these equations. This is the motivation of the present work.

Elemental analysis of New Zealand Nephrite Jade (pounamu) for forensic purposes

Pounamu (NZ jade), or nephrite, is a protected mineral in its natural form following the transfer of ownership back to Ngai Tahu under the Ngai Tahu (Pounamu Vesting) Act 1997. Any theft of nephrite is prosecutable under the Crimes Act 1961. Scientific evidence is essential in cases where origin is disputed. A robust method for discrimination of this material through the use of elemental analysis and compositional data analysis is required. Initial studies have characterised the variability within a given nephrite source. This has included investigation of both in situ outcrops and alluvial material. Methods for the discrimination of two geographically close nephrite sources are being developed. Key Words: forensic, jade, nephrite, laser ablation, inductively coupled plasma mass spectrometry, multivariate analysis, elemental analysis, compositional data analysis

Metodología de análisis del arte : visita urbanística a la ciudad y al Museo de Bellas Artes.

Resumen basado en la publicación

Liderazgo y resiliencia organizacional en la crisis financiera global del 2008–2009

Durante la crisis financiera global de 2008 muchas organizaciones y mercados financieros tuvieron que terminar sus operaciones o replantearlas debido a los choques que golpearon el bienestar de sus empresas. A pesar de esta grave situación, en la actualidad se pueden encontrar empresas que se recuperaron y salieron del terrible panorama que les presentó la crisis, incluso encontrando nuevas oportunidades de negocio y fortaleciendo su futuro. Esta capacidad que algunas organizaciones tuvieron y que permitió su salida victoriosa de la crisis se denomina resiliencia, la cual es la capacidad de sobreponerse a los efectos negativos de choques internos o externos (Briguglio, Cordina, Farrugia & Vella 2009). Por tanto en el presente trabajo se estudiará esta capacidad tanto en la organización como en los líderes para hallar factores que mejoren el desempeño de las empresas en crisis como la que ocurrió en el 2008 – 2009. Primero se realizará un estudio sobre los sucesos y el desarrollo de la crisis subprime del año 2008 para tener un entendimiento claro de sus antecedentes, desarrollo, magnitud y consecuencias. Posteriormente se realizará un estudio profundo sobre la teoría de la resiliencia organizacional y la resiliencia en el líder como individuo y los estilos de liderazgo. Finalmente teniendo un sustento teórico tanto de la crisis como del concepto de resiliencia se tomarán casos de estudio de empresas que lograron perdurar en la crisis financiera del 2008 y empresas que no lograron sobrevivir para posteriormente hallar características del líder y del liderazgo que puedan aumentar o afectar la capacidad de resiliencia de las organizaciones con el objetivo de brindar herramientas a los líderes actuales para que manejen de forma eficiente y eficaz las empresas en un mundo complejo y variable como el actual.