Search results for "Porte"

Quelle théorie pour la gouvernance?De la gouvernance actionnariale à la gouvernance cognitive et comportementale

2011

Le champ du gouvernement ou de la gouvernance des entreprises est constitué par l’analyse des règles du jeu managérial, lesquelles, en encadrant la latitude décisionnelle des dirigeants, conditionnent la création de valeur organisationnelle et, plus globalement, la performance économique. Cet article a deux principaux objectifs. Premièrement, il vise à présenter les principales théories de la gouvernance en explicitant les modèles de création et de répartition de la valeur qui les sous-tendent. Au-delà de la vision financière actionnariale qui domine le champ des recherches en gouvernance mais dont le pouvoir explicatif est limité, sont également présentées les visions contractuelles parten…

Conseil d‘administration et gouvernance:une réflexion à partir du modèle des leviers de pilotage de Simons

2011

En s’inspirant de la littérature relevant du champ du contrôle de gestion, en particulier du modèle des leviers de pilotage (levers of control) proposé par Simons (1995), l’objectif de cet article est de montrer quel peut être l’apport du management control pour analyser le pilotage des dirigeants assuré par le conseil d’administration – c’est-à-dire leur gouvernance. Cette dernière emprunte simultanément trois voies correspondant aux grands courants de la gouvernance, les courants disciplinaire, cognitif et comportemental.

Redefiniendo la competitividad desde el fair play y la justicia social

2018

espanoln este articulo se analizan, desde una perspectiva humanistica, los mensajes predominantes acerca de la competitividad en los ambitos economico y deportivo. El proposito del trabajo es identificar , destacar y valorar aquellos discursos sobre la competitivi dad que pueden favorecer relaciones sociales mas justas. Partiendo de una caracterizacion de la competitividad desde el neoliberalismo, generadora de desigualdad, se ofrece una alternativa para conseguir una competicion mas justa. Para ello , se aporta una perspectiva de la competicion, desde el deporte, basada en el fair play que atiende a los principios de igualdad, participacion y colaboracion. Ademas, se introducen algunas con…

Evaluating End-user Support : Validating the Use of Multiple Media in a CSCW Application

2006

Human-centred views on information systems are gaining more and more attention in IS community. The need to evaluate information systems from such a perspective is thus evident. In this paper, we exploit our earlier developed theoretical framework for evaluating end-user support in information systems, and demonstrate its usage in validating the use of multiple communication and collaboration media in a CSCW application. The evaluation is performed in terms of user perception in ISD process, users’ role in organizational information processing, and users’ behavioural nuances. Our study shows that a context specific theoretical framework is useful in validating the empirical results of syste…

Synteza i charakterystyka kompleksów tytanu kowalencyjnie związanych z nośnikiem krzemionkowym oraz ich właściwości katalityczne w (ko)polimeryzacji …

2017

Zsyntezowano i scharakteryzowano dwa nowe ligandy wielodonorowe, amino-bis(fenolanowy) oraz fenoksyiminowy, kowalencyjnie związane z nośnikiem krzemionkowym, które następnie poddano reakcji z TiCl4. Zsyntezowane nośnikowe kompleksy tytanu, po uprzedniej ich aktywacji przy użyciu różnych związków glinoorganicznych oraz tetrakis(pentafluorofenylo)boranu tritylu, przetestowano w homopolimeryzacji etylenu i 1-oktenu, oraz w kopolimeryzacji tych olefin. Badane katalizatory wykazują niewielką aktywność w tych procesach, przy czym najaktywniejszy okazał się kompleks 1 zawierający ligand amino-bis(fenolanowy) aktywowany MAO. Kompleks ten polimeryzuje również 1-okten, dając produkt o zawartości pent…

Reported speech and talk dramatizations as means of humour in Late Night with Conan O'Brien

2009

Monovalent cation conductance in Xenopus laevis oocytes expressing hCAT-3

2005

hCAT-3 (human cationic amino acid transporter type three) was investigated with both the two-electrode voltage clamp method and tracer experiments. Oocytes expressing hCAT-3 displayed less negative membrane potentials and larger voltage-dependent currents than native or water-injected oocytes did. Ion substitution experiments in hCAT-3-expressing oocytes revealed a large conductance for Na + and K + . In the presence of l-Arg, voltage-dependent inward and outward currents were observed. At symmetrical (inside/outside) concentrations of l-Arg, the conductance of the transporter increased monoexponentially with the l-Arg concentrations; the calculated Vmax and KM values amounted to 8.3 AS and…

Exercise and lactate production:implication in fatigue and in brain signaling

2016

More than two hundred years after its discovery, lactate still remains an intriguing molecule. Considered for a long time as a waste product of metabolism and the culprit behind muscular fatigue, it was then recognized as an important fuel for many cells. In particular, in the nervous system, it has been proposed that lactate, released by astrocytes in response to neuronal activation, is taken up by neurons, oxidized to pyruvate and used for synthesizing acetyl-CoA to be used for the tricarboxylic acid cycle. More recently, in addition to this metabolic role, the discovery of a specific receptor prompted a reconsideration of its role, and lactate is now seen as a sort of hormone, even invol…

Metabolism via arginase or nitric oxide synthase: two competing arginine pathways in macrophages

2014

Macrophages play a major role in the immune system, both as antimicrobial effector cells and as immunoregulatory cells, which induce, suppress or modulate adaptive immune responses. These key aspects of macrophage biology are fundamentally driven by the phenotype of macrophage arginine metabolism that is prevalent in an evolving or ongoing immune response. M1 macrophages express the enzyme nitric oxide synthase (NOS), which metabolizes arginine to nitric oxide (NO) and citrulline. NO can be metabolized to further downstream reactive nitrogen species, while citrulline might be reused for efficient NO synthesis via the citrulline-NO cycle. M2 macrophages are characterized by expression of the…

Interleukin 10 restores lipopolysaccharide-induced alterations in synaptic plasticity probed by repetitive magnetic stimulation

2020

Systemic inflammation is associated with alterations in complex brain functions such as learning and memory. However, diagnostic approaches to functionally assess and quantify inflammation-associated alterations in synaptic plasticity are not well-established. In previous work, we demonstrated that bacterial lipopolysaccharide (LPS)-induced systemic inflammation alters the ability of hippocampal neurons to express synaptic plasticity, i.e., the long-term potentiation (LTP) of excitatory neurotransmission. Here, we tested whether synaptic plasticity induced by repetitive magnetic stimulation (rMS), a non-invasive brain stimulation technique used in clinical practice, is affected by LPS-induc…