Search results for " Theory of"

The Free Radical Theory of Aging Revisited: The Cell Signaling Disruption Theory of Aging

2013

AbstractSignificance: The free radical theory of aging has provided a theoretical framework for an enormous amount of work leading to significant advances in our understanding of aging. Up to the turn of the century, the theory received abundant support from observations coming from fields as far apart as comparative physiology or molecular biology. Recent Advances: Work from many laboratories supports the theory, for instance showing that overexpression of antioxidant enzymes results in increases in life-span. But other labs have shown that in some cases, there is an increased oxidative stress and increased longevity. The discovery that free radicals can not only cause molecular damage to …

Languages associated with saturated formations of groups

2013

International audience; In a previous paper, the authors have shown that Eilenberg's variety theorem can be extended to more general structures, called formations. In this paper, we give a general method to describe the languages corresponding to saturated formations of groups, which are widely studied in group theory. We recover in this way a number of known results about the languages corresponding to the classes of nilpotent groups, soluble groups and supersoluble groups. Our method also applies to new examples, like the class of groups having a Sylow tower.; Dans un article précédent, les auteurs avaient montré comment étendre le théorème des variétés d'Eilenberg à des structures plus g…

Harmonic Analysis of Unstable Systems

2003

Weak and strong coupling equilibration in nonabelian gauge theories

2015

We present a direct comparison studying equilibration through kinetic theory at weak coupling and through holography at strong coupling in the same set-up. The set-up starts with a homogeneous thermal state, which then smoothly transitions through an out-of-equilibrium phase to an expanding system undergoing boost-invariant flow. This first apples-to-apples comparison of equilibration provides a benchmark for similar equilibration processes in heavy-ion collisions, where the equilibration mechanism is still under debate. We find that results at weak and strong coupling can be smoothly connected by simple, empirical power-laws for the viscosity, equilibration time and entropy production of t…

Quantum and Braided Integrals

2001

We give a pedagogical introduction to integration techniques appropriate for non-commutative spaces while presenting some new results as well. A rather detailed discussion outlines the motivation for adopting the Hopf algebra language. We then present some trace formulas for the integral on Hopf algebras and show how to treat the $\int 1=0$ case. We extend the discussion to braided Hopf algebras relying on diagrammatic techniques. The use of the general formulas is illustrated by explicitly worked out examples.

Mitochondria and Ageing

2018

Mitochondria are the major sites of oxygen utilisation for energy production in cells. Indeed, all the reactions of the Krebs’ Cycle take place in mitochondria and they produce NADH and succinate, which are then oxidised in the respiratory chain. Experiments dating back to the early part of the twentieth century seemed to indicate that at a high rate of oxygen consumption (referred to gram of body weight) was normally associated with a low maximum lifespan. Thus, it was thought that it was the rate of oxygen utilisation that was related to “the rate of living”. However, more recent data pointed out that birds are unique because they combine high rates of oxygen consumption with a high maxim…

Assessing complexity in learning outcomes : a comparison between the SOLO taxonomy and the model of hierarchical complexity

2015

An important aspect of higher education is to educate students who can manage complex relationships and solve complex problems. Teachers need to be able to evaluate course content with regard to complexity, as well as evaluate students’ ability to assimilate complex content and express it in the form of a learning outcome. One model for evaluating complexity is the Structure of Observed Learning Outcomes (SOLO) taxonomy. The aim of this analysis is to address the limitations of the SOLO taxonomy in detecting the more subtle differences of the learning outcomes and to clarify the concept of learning modes. This is done by analysing the SOLO taxonomy by means of the model of hierarchical comp…

Developing Moral Competence in Higher Education

2014

In the European Qualifications Framework (EQF), moral and ethical competence is nearly absent from curricula development criteria. The recovery and incorporation of moral competence is an essential reflection: by integrating the ethical or moral dimensions of knowledge with the intellectual and technical dimensions, higher education can more effectively respond to the needs of society. This chapter affirms that the concept of habit offers an innovative perspective on human behavior that can contribute towards a more complete understanding and development of the concept of competence, and specifically of “moral competence” for both the sciences and social sciences.

The bright and dark sides of CEO hubris: Assessing cultural distance in international business

2021

This paper aims to enrich the behavioral theory of international business strategyby investigating how CEO hubris (i.e., excess pride and confidence) affects inter-national strategic choices, that is, location selection, entry timing, and modes ofentry into the target market. Specifically, we focus on the relationship betweencultural distance and international strategic choices and consider hubris as a mech-anism that influences CEOs’ decisions. Our conceptual framework recognizes thatthe performance of international strategies managed by hubristic CEOs isextremely volatile. On the one hand, we corroborate the idea that hubris has adark side that may lead to pernicious outcomes. On the othe…

Haciendo desigualdad de la diferencia: meritocracia y derecho a la identidad cultural. A propósito de la posición del pueblo gitano

2009

The persistent information on high levels of unemployment and premature abandon of school of roma students (with all the precautions with regard to undue generalizations, cases of full integration etc.) allow that the question of the right to a cultural identity turns out to be current, as well as its repercussion in areas as those of education and employment. This work analyzes the implication of the cultural difference, in the concrete case of the roma, taking into account the kind of economica inequality legitimized according to the meritocratic system wich informs the mentioned areas. It is dealing with a dissatisfaction judgement in human rights terms for the situation of a group wich …