Search results for "-Ag"
showing 10 items of 514 documents
An organisational approach to engineer emergence within holarchies
2010
An open issue in self-organisation is how to engineer emergent behaviours. This issue is also of interest for engineering holonic multi-agent systems as any level of a holarchy is dependant of the emergent behaviours of its sub-levels. In order to tackle this specific feature of holonic multi-agent systems, the capacity concept which abstracts a know-how from its concrete realisation is introduced. The use of this concept is illustrated in this paper through a case study using the ASPECS development process which enables the analysis, design, implementation and deployment of holonic multi-agent systems and integrates the capacity as a core concept of it is underlying metamodel, called capac…
Fonctionnement et dynamique des formes ligneuses au sein d'une exploitation agricole. Un raisonnement géo-agronomique
2004
International audience; Les changements dans les systèmes de production génèrent une réorganisation spatiale des pratiques au sein des exploitations agricoles. Celle-ci a un effet direct sur l’organisation du parcellaire. Face à cette dynamique se pose la question de l’évolution des formes ligneuses et aussi de leur rôle dans le fonctionnement d’exploitations modifiant leurs pratiques agricoles et leur système de production. À partir de l’étude d’une exploitation agricole, ce travail expose le double regard porté par le géographe et l’agronome sur la question de la place qu’occupe la végétation ligneuse et de son rôle sur le fonctionnement de l’exploitation.
Loneliness in sports active and non-active school-age children: Can sport protect children against loneliness?
2023
IntroductionThis study aims to examine can sport protect children against loneliness and, if yes, whether this relationship depends on gender and/or sports-related variables.MethodsThe sample includes 762 10-year-old children (414 boys). The total score of The Children's Loneliness Scale is a dependent variable in the study, while sports participation (sports active—individual or team sports, or non-active) and level/duration of sports participation are independent variables.ResultsObtained results indicate that the degree of loneliness differs depending on gender and whether the children are in sports activities or not. Unlike the level of sports participation, the duration of sports parti…
Minding morality : ethical artificial societies for public policy modeling
2020
AbstractPublic policies are designed to have an impact on particular societies, yet policy-oriented computer models and simulations often focus more on articulating the policies to be applied than on realistically rendering the cultural dynamics of the target society. This approach can lead to policy assessments that ignore crucial social contextual factors. For example, by leaving out distinctive moral and normative dimensions of cultural contexts in artificial societies, estimations of downstream policy effectiveness fail to account for dynamics that are fundamental in human life and central to many public policy challenges. In this paper, we supply evidence that incorporating morally sal…
Future Directions in the Pharmacologic Therapy of Chronic Obstructive Pulmonary Disease
2005
Current therapy for chronic obstructive pulmonary disease (COPD) fails to alter its relentless progression. This remains a significant challenge and unmet need. A recent advance is the demonstration that treatment with a fixed dose of an inhaled corticosteroid and a long-acting beta2-agonist in COPD improves lung function and quality of life, and reduces exacerbation more effectively than either drug alone. Other improvements include the introduction of tiotropium, a once-daily anticholinergic. In advanced clinical development are other once-daily bronchodilators and combinations of anticholinergic drugs and beta2-agonists. Increased understanding of the pathogenesis of COPD has led to nove…
Influence of endothelial nitric oxide on neurogenic contraction of human pulmonary arteries.
1995
The present study was designed to investigate the contribution of the endothelium and that of the L-arginine pathway on the contractile responses of isolated human pulmonary arteries to electrical field stimulation (EFS) and noradrenaline. Isometric tension was measured in artery rings obtained from portions of human lung after thoracic surgery for removal of lung carcinoma (18 patients). Electrical field stimulation (EFS) induced frequency-dependent contractions of isolated human pulmonary arteries which were abolished by tetrodotoxin, guanethidine and prazosin (all at 10(-6) M). The increases in tension were of greater magnitude in arteries denuded of endothelium. NG-nitro-L-arginine meth…
Current and future pharmacologic therapy of exacerbations in chronic obstructive pulmonary disease and asthma.
2005
Exacerbations are an important cause of the morbidity and mortality associated with asthma and chronic obstructive pulmonary disease. Newer therapies include long-acting beta(2)-agonists, which are more effective than short-acting bronchodilators. Inhaled corticosteroids and, in asthma, leukotriene receptor antagonists may have roles in the early phase of exacerbation as an alternative to or added to oral prednisolone. In the future, combinations of long-acting beta(2)-agonists and anticholinergic bronchodilators may offer additive clinical benefits. However, although the treatment and prevention of exacerbations of chronic obstructive pulmonary disease and asthma have been improved by usin…
The use of bronchodilators in the treatment of airway obstruction in elderly patients
2006
Abstract Ageing is associated with important anatomical, physiological and psychosocial changes that may have an impact on the management of obstructive airway diseases (asthma and chronic obstructive pulmonary disease (COPD)) and on their optimal therapy. Ageing-related modifications might be responsible for a different effectiveness of bronchodilators in the elderly patients as compared to younger subjects. Furthermore, the physiological involution of organs and the frequent comorbidity, often interfere with pharmacokinetics of bronchodilator drugs used in asthma and COPD. This review will focus on the use of bronchodilators in the elderly, with particular attention to the achievable goal…
Quantifier Elimination and Rectilinearisation Theorem for Generalised Quasianalytic Algebras
2013
International audience; An algebra of germs of real functions is generalised quasianalytic if to each element of the algebra we can associate, injectively, a power series with nonnegative real exponents. We prove a quantifier elimination and a rectilinearisation result for generalised quasianalytic algebras.
Finiteness properties of pseudo-hyperbolic varieties
2019
Motivated by Lang-Vojta's conjecture, we show that the set of dominant rational self-maps of an algebraic variety over a number field with only finitely many rational points in any given number field is finite by combining Amerik's theorem for dynamical systems of infinite order with properties of Prokhorov-Shramov's notion of quasi-minimal models. We also prove a similar result in the geometric setting by using again Amerik's theorem and Prokhorov-Shramov's notion of quasi-minimal model, but also Weil's regularization theorem for birational self-maps and properties of dynamical degrees. Furthermore, in the geometric setting, we obtain an analogue of Kobayashi-Ochiai's finiteness result for…