615 research outputs found
Financing Higher Education: a contributory education scheme
In this paper, we study the higher education financing based on the classical contributory versus self-funded pension funding scheme. We provide a brief discussion of how a system based on student debt can be seen 'funded' and why it fails to ensure equity and efficiency and funding for the longer term. We also define a contributory financing scheme for higher education based on income tax and social security contributions, and study its strengths and weaknesses. By contributory, we mean a scheme that ensures free access to university, providing for students' expenses and the costs of research and teaching. We show that such a system would be efficient and equitable, and we discuss under what conditions it would be efficient. We show also that it would prevent polarization in the higher education system. We conclude with an implementation of our contributory financing scheme in the case of France (it increases university funding by €5bn and provides €19bn for students' expenditure) and illustrate the effect of such a scheme on some typical households
Contributory education scheme : theoretical basis and application
International audienceAfter a short criticism of the "self-funded education scheme" which is widely implemented in the world and often based on tuition fees, this article develops theoretical basis for a "contributory education scheme". This model is characterised 1) by a universal access for students to grants allowing them to take charge of themselves during their higher education curriculum; and 2) by a funding regime relying in particular on the population that has benefited from grants, once studies are finished. The article first points out the limits of the self-funded education scheme. Then, it discusses the analogies and differences with pension systems implemented in countries like France. We derive theoretical motivations in favour of a contributory education scheme: The equity of access to higher education, the incentives for students and university to be efficient, as well as the contributory equity are discussed. The article proposes finally to assess, for France, the cost and the options concerning the transformation of the tax system that would be needed for funding such a reform. Beyond the individual income, variables like the degree obtained by the student are taken into account in our assessment. The conclusion draws research perspectives concerning the theoretical dimensions and the transition such a reform concretely implies
Régime par répartition dans l'enseignement supérieur : fondements théoriques et estimations empiriques
Après avoir rappelé qu'un régime par capitalisation ne garantissait ni équité, ni efficience, ni même le financement de l'enseignement supérieur, nous définissons ce que pourrait être un régime d'éducation par répartition et discuté de ses atouts et limites, pour construire une approche théorique du concept. Une éducation par répartition conjugue la gratuité de l'accès, une allocation universelle d'autonomie et un accroissement des dépenses publiques destinés à l'université (jusqu'à un niveau jugé raisonnable pour que celle-ci puisse mener à bien ses missions). Nous montrons qu'un tel régime peut se révéler équitable et efficace pour financer le système éducatif et discutons des conditions permettant à un tel système d'être efficient. Nous montrons également qu'il permet de limiter les mécanismes de polarisation au sein de l'enseignement supérieur. Nous chiffrons alors le coût du régime par répartition (en année pleine: 5 milliards d'euros pour accroître les besoins de financement des universités et 19 milliards d'euros pour l'allocation d'autonomie), proposons des modalités de financement et analysons l'impact de ce régime sur les revenus de foyers types. Nous concluons en présentant les limites et perspectives de recherche
Financing higher education: a contributory scheme
In this paper, we study the higher education financing based on the classical contributory versus self-funded pension funding scheme. We provide a brief discussion of how a system based on student debt can be seen ’funded’ and why it fails to ensure equity and efficiency and funding for the longer term. We also define a contributory financing scheme for higher education based on income tax and social security contributions, and study its strengths and weaknesses. By contributory, we mean a scheme that ensures free access to university, providing for students’ expenses and the costs of research and teaching. We show that such a system would be efficient and equitable, and we discuss under what conditions it would be efficient. We show also that it would prevent polarization in the higher education system. We conclude with an implementation of our contributory financing scheme in the case of France (it increases university funding by €5bn and provides €19bn for students’ expenditure) and illustrate the effect of such a scheme on some typical households
Letter. On the activation of [CrCl3{R-SN(H)S-R}] catalysts for selective trimerization of ethene: a freeze-quench Cr K-edge XAFS study
Homogeneous chromium catalysts for the selective conversion of ethene to hex-1-ene are formed from Cr(III) reagents, amino-thioether ligands of the type HN(CH2CH2SR)2, and aluminum reagents. In this study the early activation steps are investigated by EPR, UV-visible and Cr K-edge XAFS spectroscopy; rapid stopped-flow mixing and a freeze-quench allows good quality EXAFS analysis of a species formed in ~ 1 second of reaction. This is shown to involve reduction to Cr(II) and deprotonation of a NH group of the auxiliary ligand. This 4-coordinate metal-center may act as precursor for the coordination of ethene and subsequent selective oligomerization
Large-scale shifts in phytoplankton groups in the Equatorial Pacific during ENSO cycles
The El Niño Southern Oscillation (ENSO) drives important changes in the marine productivity of the Equatorial Pacific, in particular during major El Niño/La Niña transitions. Changes in environmental conditions associated with these climatic events also likely impact phytoplankton composition. In this work, the distribution of four major phytoplankton groups (nanoeucaryotes, Prochlorococcus, Synechococcus, and diatoms) was examined between 1996 and 2007 by applying the PHYSAT algorithm to the ocean color data archive from the Ocean Color and Temperature Sensor (OCTS) and Sea-viewing Wide Field-of-view Sensor (SeaWiFS). Coincident with the decrease in chlorophyll concentrations, a large-scale shift in the phytoplankton composition of the Equatorial Pacific, that was characterized by a decrease in Synechococcus and an increase in nanoeucaryote dominance, was observed during the early stages of both the strong El Niño of 1997 and the moderate El Niño of 2006. A significant increase in diatoms dominance was observed in the Equatorial Pacific during the 1998 La Niña and was associated with elevated marine productivity. An analysis of the environmental variables using a coupled physical-biogeochemical model (NEMO-PISCES) suggests that the Synechococcus dominance decrease during the two El Niño events was associated with an abrupt decline in nutrient availability (−0.9 to −2.5 μM NO3 month−1). Alternatively, increased nutrient availability (3 μM NO3 month−1) during the 1998 La Niña resulted in Equatorial Pacific dominance diatom increase. Despite these phytoplankton community shifts, the mean composition is restored after a few months, which suggests resilience in community structure
Characteristics of Control Laws Tested on the Semi-Span Super-Sonic Transport (S4T) Wind-Tunnel Model
The Semi-Span Supersonic Transport (S4T) is an aeroelastically scaled wind-tunnel model built to test active controls concepts for large flexible supersonic aircraft in the transonic flight regime. It is one of several models constructed in the 1990's as part of the High Speed Research (HSR) Program. Control laws were developed for the S4T by M4 Engineering, Inc. and by Zona Technologies, Inc. under NASA Research Announcement (NRA) contracts. The model was tested in the NASA-Langley Transonic Dynamics Tunnel (TDT) four times from 2007 to 2010. The first two tests were primarily for plant identification. The third entry was used for testing control laws for Ride Quality Enhancement, Gust Load Alleviation, and Flutter Suppression. Whereas the third entry only tested FS subcritically, the fourth test demonstrated closed-loop operation above the open-loop flutter boundary. The results of the third entry are reported elsewhere. This paper reports on flutter suppression results from the fourth wind-tunnel test. Flutter suppression is seen as a way to provide stability margins while flying at transonic flight conditions without penalizing the primary supersonic cruise design condition. An account is given for how Controller Performance Evaluation (CPE) singular value plots were interpreted with regard to progressing open- or closed-loop to higher dynamic pressures during testing
Inorganic pyrophosphate generation by transforming growth factor-beta-1 is mainly dependent on ANK induction by Ras/Raf-1/extracellular signal-regulated kinase pathways in chondrocytes
ANK is a multipass transmembrane protein transporter thought to play a role in the export of intracellular inorganic pyrophosphate and so to contribute to the pathophysiology of chondrocalcinosis. As transforming growth factor-beta-1 (TGF-β1) was shown to favor calcium pyrophosphate dihydrate deposition, we investigated the contribution of ANK to the production of extracellular inorganic pyrophosphate (ePPi) by chondrocytes and the signaling pathways involved in the regulation of Ank expression by TGF-β1. Chondrocytes were exposed to 10 ng/mL of TGF-β1, and Ank expression was measured by quantitative polymerase chain reaction and Western blot. ePPi was quantified in cell supernatants. RNA silencing was used to define the respective roles of Ank and PC-1 in TGF-β1-induced ePPi generation. Finally, selective kinase inhibitors and dominant-negative/overexpression plasmid strategies were used to explore the contribution of several signaling pathways to Ank induction by TGF-β1. TGF-β1 strongly increased Ank expression at the mRNA and protein levels, as well as ePPi production. Using small interfering RNA technology, we showed that Ank contributed approximately 60% and PC-1 nearly 20% to TGF-β1-induced ePPi generation. Induction of Ank by TGF-β1 required activation of the extracellular signal-regulated kinase (ERK) pathway but not of p38-mitogen-activated protein kinase or of protein kinase A. In line with the general protein kinase C (PKC) inhibitor calphostin C, Gö6976 (a Ca2+-dependent PKC inhibitor) diminished TGF-β1-induced Ank expression by 60%, whereas a 10% inhibition was observed with rottlerin (a PKCδ inhibitor). These data suggest a regulatory role for calcium in TGF-β1-induced Ank expression. Finally, we demonstrated that the stimulatory effect of TGF-β1 on Ank expression was inhibited by the suppression of the Ras/Raf-1 pathway, while being enhanced by their constitutive activation. Transient overexpression of Smad 7, an inhibitory Smad, failed to affect the inducing effect of TGF-β1 on Ank mRNA level. These data show that TGF-β1 increases ePPi levels, mainly by the induction of the Ank gene, which requires activation of Ras, Raf-1, ERK, and Ca2+-dependent PKC pathways in chondrocytes
Anti-inflammatory effect of antidiabetic thiazolidinediones prevents bone resorption rather than cartilage changes in experimental polyarthritis
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