Browsing Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages & linguistics   Literature   Performing arts   Philosophy & ethics   Religion & theology   Multidisciplinary, general & others Business & economic sciences   Accounting & auditing   Production, distribution & supply chain management   Finance   General management & organizational theory   Human resources management   Management information systems   Marketing   Strategy & innovation   Quantitative methods in economics & management   General economics & history of economic thought   International economics   Macroeconomics & monetary economics   Microeconomics   Economic systems & public economics   Social economics   Special economic topics (health, labor, transportation…)   Multidisciplinary, general & others Engineering, computing & technology   Aerospace & aeronautics engineering   Architecture   Chemical engineering   Civil engineering   Computer science   Electrical & electronics engineering   Energy   Geological, petroleum & mining engineering   Materials science & engineering   Mechanical engineering   Multidisciplinary, general & others Human health sciences   Alternative medicine   Anesthesia & intensive care   Cardiovascular & respiratory systems   Dentistry & oral medicine   Dermatology   Endocrinology, metabolism & nutrition   Forensic medicine   Gastroenterology & hepatology   General & internal medicine   Geriatrics   Hematology   Immunology & infectious disease   Laboratory medicine & medical technology   Neurology   Oncology   Ophthalmology   Orthopedics, rehabilitation & sports medicine   Otolaryngology   Pediatrics   Pharmacy, pharmacology & toxicology   Psychiatry   Public health, health care sciences & services   Radiology, nuclear medicine & imaging   Reproductive medicine (gynecology, andrology, obstetrics)   Rheumatology   Surgery   Urology & nephrology   Multidisciplinary, general & others Law, criminology & political science   Civil law   Criminal law & procedure   Criminology   Economic & commercial law   European & international law   Judicial law   Metalaw, Roman law, history of law & comparative law   Political science, public administration & international relations   Public law   Social law   Tax law   Multidisciplinary, general & others Life sciences   Agriculture & agronomy   Anatomy (cytology, histology, embryology...) & physiology   Animal production & animal husbandry   Aquatic sciences & oceanology   Biochemistry, biophysics & molecular biology   Biotechnology   Entomology & pest control   Environmental sciences & ecology   Food science   Genetics & genetic processes   Microbiology   Phytobiology (plant sciences, forestry, mycology...)   Veterinary medicine & animal health   Zoology   Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences   Chemistry   Earth sciences & physical geography   Mathematics   Physics   Space science, astronomy & astrophysics   Multidisciplinary, general & others Social & behavioral sciences, psychology   Animal psychology, ethology & psychobiology   Anthropology   Communication & mass media   Education & instruction   Human geography & demography   Library & information sciences   Neurosciences & behavior   Regional & inter-regional studies   Social work & social policy   Sociology & social sciences   Social, industrial & organizational psychology   Theoretical & cognitive psychology   Treatment & clinical psychology   Multidisciplinary, general & others      by title 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z or enter first few letters:    OK Showing results 35261 to 35280 of 96342     1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769     Excess atmospheric carbon dioxide transported by rivers into the Scheldt EstuaryAbril, Gwenaël; Etcheber, Henri; Borges, Alberto et alin Comptes Rendus de l'Académie des Sciences de Paris (2000), 330The transport of excess atmospheric CO2 (defined as the fraction of dissolved inorganic carbon (DIC) that can escape as CO2 to the atmosphere due to water-air equilibration), by the five rivers entering ... [more ▼]The transport of excess atmospheric CO2 (defined as the fraction of dissolved inorganic carbon (DIC) that can escape as CO2 to the atmosphere due to water-air equilibration), by the five rivers entering the Scheldt estuary is investigated. Excess CO2 originates from both respiration in the soil and the river and represents 10 % of the DIC and 6 % of the total carbon input into the estuary. The ventilation of this CO2 in the estuary is however a minor contribution (10 %) to the total estuarine emission to the atmosphere, compared to heterotrophic activity and acidification due to nitrification within the estuarine zone. [less ▲]Detailed reference viewed: 19 (2 ULg) Excess Return Forecast Using a Dynamic Asset Class Factor ModelHübner, Georges ; Sougné, Danielle ; Wijnandts, Jean-Charles E-print/Working paper (2012)We propose a Dynamic Hierarchical Factor Model using Asset classes to predict mutual funds excess returns. We use different forecast combination schemes of bivariate model considering each asset class ... [more ▼]We propose a Dynamic Hierarchical Factor Model using Asset classes to predict mutual funds excess returns. We use different forecast combination schemes of bivariate model considering each asset class factor in isolation. Primary analysis highlights the importance to account for asset class specific variations together with between classes or common variations. Further refinements of the a priori repartition are however in order. Forecasting performance of the model outperforms the historical mean benchmark both in terms of MSPE and utility based criteria. A forecasting exercise matching more closely real-time conditions must be undertaken to validate these initial results. [less ▲]Detailed reference viewed: 27 (1 ULg) Excessive alcohol consumption, socio-professional statute and follow-up in general medicineFilée, Dominique ; Gosset, Christiane ; Pasquasy, N et alConference (2005)Detailed reference viewed: 3 (2 ULg) Excessive Pricing: The Flaws of ‘Tea Party Competition’ PolicyPetit, Nicolas in Journal of European Competition Law and Practice (2011), 2(6), 519-520Since the adoption of the Guidance Communication in 2009, the Commission has kept exploitative abuses— and in particular excessive pricing cases—in a state of artificial hibernation, and focused on ... [more ▼]Since the adoption of the Guidance Communication in 2009, the Commission has kept exploitative abuses— and in particular excessive pricing cases—in a state of artificial hibernation, and focused on exclusionary cases as a matter of enforcement priority. The Commission’s small antitrust policy against exploitative abuses is predicated on ‘Tea Party’ competition economics: in the long term, high prices are presumed to deliver efficient outcomes, and competition enforcers risk doing more harm than good in trying to improve market outcomes [less ▲]Detailed reference viewed: 17 (1 ULg) Exchange of polymer molecules between block copolymer micelles studied by emission spectroscopy. A method for the quantification of unimer exchange ratesCreutz, Serge; van Stam, Jan; Antoun, Sayed et alin Macromolecules (1997), 30(14), 4078-4083Amphiphilic block copolymers, composed of poly(sodium methacrylate) (PMANa) as the water soluble sequence and poly((dimethylamino)ethyl methacrylate) (PDMAEMA) as the hydrophobic sequence, were ... [more ▼]Amphiphilic block copolymers, composed of poly(sodium methacrylate) (PMANa) as the water soluble sequence and poly((dimethylamino)ethyl methacrylate) (PDMAEMA) as the hydrophobic sequence, were anionically synthesized. Due to their amphiphilic character, these polymers aggregate into micelles in aqueous solutions. Of particular interest is the possibility of exchange of free chains, called unimers, between micelles and the bulk and the quantification of the exchange rate. The exchange of unimers between the micellar aggregates was determined spectroscopically. A donor molecule, naphthalene, was covalently bound to the hydrophobic blocks of the copolymers, while the acceptor, pyrene, was dissolved in aggregates built up from an identical, but unlabeled, copolymer. The energy transfer from an excited donor to a ground-state acceptor, with subsequent emission from the acceptor, was used to follow the migration of donor-labeled chains into micelles containing the dissolved acceptor. These data were analyzed according to a kinetic model, and the respective kinetic parameters could be determined. The influence of the relative composition of the block copolymer on the exchange rate was investigated to illustrate the usability of the kinetic model. While keeping the relative amount of comonomers as well as the molecular weights constant, the molecular architecture was also studied: hence the diblock (PDMAEMA-b-PMANa) and the corresponding triblocks (PDMAEMA-b-PMANa-b-PDMAEMA) and (PMANa-b-PDMAEMA-b-PMANa) were investigated. [less ▲]Detailed reference viewed: 22 (1 ULg) Exchange processes and nitrogen cycling on the shelf and continental slope of the Black Sea basinGrégoire, Marilaure ; Lacroix, Genevièvein Global Biogeochemical Cycles (2003), 17(2), A 3D coupled biogeochemical-hydrodynamical model has been applied to the Black Sea to simulate nitrogen cycling and to estimate the exchange of biogeochemical components at the shelf break and between the ... [more ▼]A 3D coupled biogeochemical-hydrodynamical model has been applied to the Black Sea to simulate nitrogen cycling and to estimate the exchange of biogeochemical components at the shelf break and between the continental slope and the deep sea. It was found that biological processes on the northwestern shelf are in approximate balance. Primary production is fueled by river discharge, nitrate input from the open sea at the shelf break, and in situ remineralization. The input of nitrate from the open sea is roughly equivalent to the river nitrate discharge but is half the nitrate export from the shelf toward the open sea. Also, the Black Sea shelf acts throughout the year as a nitrate source for the open sea. The amount of shelf production not remineralized in the euphotic layer is 22.2% and is exported to lower layers (20%) or offshore (2.2%). We estimate that the export of carbon from the shelf to the interior of the basin represents 2.5% of the new production of the open sea. The upper slope adjoining the northwestern shelf is the site of downwelling events responsible for the downward transport to the intermediate layer of the continental slope of biogeochemical components exported from the shelf in the upper layer. The shelf has been found to be an efficient trap for the refractory material discharged by the Danube. [less ▲]Detailed reference viewed: 24 (5 ULg) Exchange processes and nitrogen cycling on the shelf and slopes area of the Black Sea basin.Grégoire, Marilaure ; Beckers, Jean-Marie ; Kostianoy, A. et alConference (2003, January)Detailed reference viewed: 6 (0 ULg) The exchange reaction of peptides R-D-alanyl-D-alanine with D-[14C]alanine to R-D-alanyl-D-[14C]alanine and D-alanine, catalysed by the membranes of Streptococcus faecalis ATCC 9790Coyette, Jacques; Ghuysen, Jean-Marie ; Perkins, Harold R.in European Journal of Biochemistry (1977), 75(1), 225-229Under alkaline conditions, the membrane-bound DD-carboxypeptidase of Streptococcus faecalis ATCC 9790 catalyses exchange reactions in which the X-L-R3-D-Ala moiety of peptides of the type X-L-R3-D-Ala-D ... [more ▼]Under alkaline conditions, the membrane-bound DD-carboxypeptidase of Streptococcus faecalis ATCC 9790 catalyses exchange reactions in which the X-L-R3-D-Ala moiety of peptides of the type X-L-R3-D-Ala-D-Ala is transferred to simple amino compounds such as D-alanine, glycine and glycyl-glycine. The enzyme system is unable, however, to catalyse complex reactions that would simulate the natural transpeptidation reaction. [less ▲] Exchanges in Military Education: Erasmus and BeyondPaile, Sylvain Learning material (2011)Detailed reference viewed: 13 (0 ULg) Excision of imidazole ring-opened N7-hydroxyethylguanine from chloroethylnitrosourea-treated DNA by Escherichia coli formamidopyrimidine-DNA glycolsylaseLaval, J.; Lopes, F.; Madelmont, J. et alin IARC Scientific Publications (1991), 105Detailed reference viewed: 2 (0 ULg) Excitabilité nerveuse et neuropathies périphériques : résultats d’une étude multicentriqueKuntzer, Thierry; Carrera, E; Boërio, D et alin Neurophysiologie Clinique = Clinical Neurophysiology (2004)Detailed reference viewed: 6 (0 ULg) Excitability of visual V1-V2 and motor cortices to single transcranial magnetic stimuli in migraine: a reappraisal using a figure-of-eight coil.Bohotin, V.; Fumal, Arnaud ; Vandenheede, M. et alin Cephalalgia : An International Journal of Headache (2003), 23(4), 264-70We used transcranial magnetic stimulation (TMS) with a figure-of-eight coil to excite motor and visual V1-V2 cortices in patients suffering from migraine without (MO) (n = 24) or with aura (MA) (n = 13 ... [more ▼]We used transcranial magnetic stimulation (TMS) with a figure-of-eight coil to excite motor and visual V1-V2 cortices in patients suffering from migraine without (MO) (n = 24) or with aura (MA) (n = 13) and in healthy volunteers (HV) (n = 33). Patients who had a migraine attack within 3 days before or after the recordings were excluded. All females were recorded at mid-cycle. Single TMS pulses over the occipital cortex elicited phosphenes in 64% of HV, 63% of MO and 69% of MA patients. Compared with HV, the phosphene threshold was significantly increased in MO (P = 0.001) and in MA (P = 0.007), but there was no difference between the two groups of migraineurs. The motor threshold tended to be higher in both migraine groups than in HV, but the differences were not significant. In conclusion, this study shows that two-thirds (64.86%) of patients affected by either migraine type present an increased phosphene threshold in the interictal period, which suggests that their visual cortex is hypoexcitable. [less ▲]Detailed reference viewed: 7 (0 ULg) Excitation du pneumogastrique chez le lapin empoisonnée par le CO2Fredericq, Léon in Archives de Biologie (1884), VDetailed reference viewed: 2 (0 ULg) Excitation of the FUV Io tail on Jupiter: Characterization of the electron precipitationGérard, Jean-Claude ; Gustin, Jacques ; Grodent, Denis et alin Journal of Geophysical Research. Space Physics (2002), 107(A11), [1] Spectral observation of both polar regions of Jupiter in the far ultraviolet (FUV) obtained with the Space Telescope Imaging Spectrograph (STIS), on board the Hubble Space Telescope from July 1997 to ... [more ▼][1] Spectral observation of both polar regions of Jupiter in the far ultraviolet (FUV) obtained with the Space Telescope Imaging Spectrograph (STIS), on board the Hubble Space Telescope from July 1997 to January 2001 have been combined with FUV images to map the FUV color ratio along the STIS slit. Spatially resolved spectra of the aurora carried at similar to12 Angstrom resolution have been used to determine the amount of methane absorption as measured by the FUV color ratio of the Io magnetic footprint and its trailing tail. It is found that the absorption is systematically less than in the main polar aurora, indicating a higher altitude source region. The color ratio of the north tail is shown to slowly decrease downstream from the footprint. The combination of these spectral data with a two-stream model of the interaction of energetic electrons with the Jovian thermosphere indicates that the mean energy of the electrons creating the north FUV emission ranges from similar to55 keV at the Io footprint to similar to40 keV, 20 degrees downstream in the tail. In parallel, the incident electron energy flux drops by a factor similar to6 over the same angular distance. These observations are consistent with the steady state slippage picture where the subcorotating flux tube is accelerated very slowly up to corotation owing to the nonideal coupling. It is argued that small deviations from corotation can supply sufficient energy to fuel the observed auroral emissions. It is suggested that the parallel electric field accelerating electrons out of the flux tube only moderately depends on the time elapsed since the contact with Io, although the mapping between a point in the tail and Io is very uncertain in the presence of magnetic field line slippage. [less ▲]Detailed reference viewed: 15 (3 ULg) Excitation processes and pulsations in the polar auroraHARANG, O.; Gérard, Jean-Claude in Bulletin de la Société Royale des Sciences de Liège (1973)Detailed reference viewed: 3 (1 ULg) Excitation spectrum of FE2+ in a tetrahedral potential - Dynamic Jahn-Teller effectColignon, David ; Kartheuser, Eduard ; Rodriguez, Sergio et alin Physical Review. B : Condensed Matter (1995)Detailed reference viewed: 23 (12 ULg) Excited (70,l+) baryon resonances in large N(c) QCDMatagne, Nicolas; Stancu, Floarea in Nucl. Phys. Proc. Suppl. (2007), 174We summarize results obtained in the $1/N_c$ expansion method for the masses of baryon resonances belonging to the $[{\bf 70},\ell^+]$ multiplet. They represent an extension of our previous studies from ... [more ▼]We summarize results obtained in the $1/N_c$ expansion method for the masses of baryon resonances belonging to the $[{\bf 70},\ell^+]$ multiplet. They represent an extension of our previous studies from two to three flavors. A better approach to mixed symmetric states of any angular momentum and parity is also outlined. [less ▲]Detailed reference viewed: 5 (0 ULg) Excited [70,l(+)] baryons in large N-c QCDMatagne, Nicolas; Stancu, Floarea in Physics Letters B (2005), 631(1-2), 7-15The masses of the positive parity [70, 0(+)] and [70, 2(+)] non-strange baryons are calculated in large N-c QCD by considering the most dominant operators in an 1/N-c expansion. The approach is based on ... [more ▼]The masses of the positive parity [70, 0(+)] and [70, 2(+)] non-strange baryons are calculated in large N-c QCD by considering the most dominant operators in an 1/N-c expansion. The approach is based on the introduction of an excited core, obtained after the last particle (an excited quark) has been removed. Configuration mixing is neglected, for simplicity. Although being a sub-leading 1/Nc order, we find that the spin-spin interaction plays a dominant role in describing the data. The role of No operators is also pointed out. We show how the contribution of the linear term in Nc, of the spin-spin and of the spin-orbit terms vary with the excitation energy. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]Detailed reference viewed: 11 (0 ULg) Excited baryons in the 1/N(c) expansionMatagne, Nicolas; Stancu, Floarea in World Scientific (2005)We review results for the mass spectrum of orbitally excited baryons obtained in the $1/N_c$ expansion. We show the dependence of various contributions to the mass operator as a function of the excitation ... [more ▼]We review results for the mass spectrum of orbitally excited baryons obtained in the $1/N_c$ expansion. We show the dependence of various contributions to the mass operator as a function of the excitation energy. [less ▲]Detailed reference viewed: 8 (1 ULg) Excited human chondrocytes can produce oxygen derived free radicals and hydrogen peroxideHenrotin, Yves Conference (1991, September 13)Detailed reference viewed: 5 (0 ULg)