References of "Already available on another site"      in 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     Showing results 1 to 100 of 335 1 2 3 4     Transiting planets from WASP-South, Euler and TRAPPIST: WASP-68 b, WASP-73 b and WASP-88 b, three hot Jupiters transiting evolved solar-type starsDelrez, Laetitia ; Van Grootel, Valérie ; Anderson, D. R. et alE-print/Working paper (2013)We report the discovery by the WASP transit survey of three new hot Jupiters, WASP-68 b, WASP-73 b and WASP-88 b. WASP-68 b has a mass of 0.95+-0.03 M_Jup, a radius of 1.24-0.06+0.10 R_Jup, and orbits a V ... [more ▼]We report the discovery by the WASP transit survey of three new hot Jupiters, WASP-68 b, WASP-73 b and WASP-88 b. WASP-68 b has a mass of 0.95+-0.03 M_Jup, a radius of 1.24-0.06+0.10 R_Jup, and orbits a V=10.7 G0-type star (1.24+-0.03 M_sun, 1.69-0.06+0.11 R_sun, T_eff=5911+-60 K) with a period of 5.084298+-0.000015 days. Its size is typical of hot Jupiters with similar masses. WASP-73 b is significantly more massive (1.88-0.06+0.07 M_Jup) and slightly larger (1.16-0.08+0.12 R_Jup) than Jupiter. It orbits a V=10.5 F9-type star (1.34-0.04+0.05 M_sun, 2.07-0.08+0.19 R_sun, T_eff=6036+-120 K) every 4.08722+-0.00022 days. Despite its high irradiation (2.3 10^9 erg s^-1 cm^-2), WASP-73 b has a high mean density (1.20-0.30+0.26 \rho_Jup) that suggests an enrichment of the planet in heavy elements. WASP-88 b is a 0.56+-0.08 M_Jup planet orbiting a V=11.4 F6-type star (1.45+-0.05 M_sun, 2.08-0.06+0.12 R_sun, T_eff=6431+-130 K) with a period of 4.954000+-0.000019 days. With a radius of 1.70-0.07+0.13 R_Jup, it joins the handful of planets with super-inflated radii. The ranges of ages we determine through stellar evolution modeling are 4.2-8.3 Gyr for WASP-68, 2.7-6.4 Gyr for WASP-73 and 1.8-5.3 Gyr for WASP-88. WASP-73 appears to be a significantly evolved star, close to or already in the subgiant phase. WASP-68 and WASP-88 are less evolved, although in an advanced stage of core H-burning. [less ▲]Detailed reference viewed: 2 (0 ULg) Le Parti Libertarien (PLIB), ou le manifeste du culte de la liberté et de la propriété de soi ?Piet, Grégory E-print/Working paper (2013)Detailed reference viewed: 7 (0 ULg) Le samedi 15 août 778Rolland, Jean-Noël E-print/Working paper (2013)Battle of Roncevaux Pass and his historical context. Roncesvalles is famous in History and legend for the defeat of Charlemagne and the death of Roland in 778, during the battle of Roncevaux Pass, when ... [more ▼]Battle of Roncevaux Pass and his historical context. Roncesvalles is famous in History and legend for the defeat of Charlemagne and the death of Roland in 778, during the battle of Roncevaux Pass, when Charlemagne's rear guard was destroyed by Basque tribes. [less ▲]Detailed reference viewed: 81 (27 ULg) Des discours et des hommes. Enquête sur les (ex-)dirigeants du SP.A et la stratégie de communication du parti : de l'image institutionnelle aux réalités socio-professionnellesGeuens, Geoffrey E-print/Working paper (2013)Detailed reference viewed: 25 (3 ULg) Transiting hot Jupiters from WASP-South, Euler and TRAPPIST: WASP-95b to WASP-101bHellier, Coel; Anderson, D. R.; Collier Cameron, A. et alE-print/Working paper (2013)We report the discovery of the transiting exoplanets WASP-95b, WASP-96b, WASP-97b, WASP-98b, WASP-99b, WASP-100b and WASP-101b. All are hot Jupiters with orbital periods in the range 2.1 to 5.7 d, masses ... [more ▼]We report the discovery of the transiting exoplanets WASP-95b, WASP-96b, WASP-97b, WASP-98b, WASP-99b, WASP-100b and WASP-101b. All are hot Jupiters with orbital periods in the range 2.1 to 5.7 d, masses of 0.5 to 2.8 Mjup, and radii of 1.1 to 1.4 Rjup. The orbits of all the planets are compatible with zero eccentricity. WASP-99b shows the shallowest transit yet found by WASP-South, at 0.4%. The host stars are of spectral type F2 to G8. Five have metallicities of [Fe/H] from -0.03 to +0.23, while WASP-98 has a metallicity of -0.60, exceptionally low for a star with a transiting exoplanet. Five of the host stars are brighter than V = 10.8, which significantly extends the number of bright transiting systems available for follow-up studies. WASP-95 shows a possible rotational modulation at a period of 20.7 d. We discuss the completeness of WASP survey techniques by comparing to the HAT project. [less ▲]Detailed reference viewed: 4 (0 ULg) Three sub-Jupiter-mass planets: WASP-69b & WASP-84b transit active K dwarfs and WASP-70Ab transits the evolved primary of a G4+K3 binaryAnderson, D. R.; Collier Cameron, A.; Delrez, Laetitia et alE-print/Working paper (2013)We report the discovery of the transiting exoplanets WASP-69b, WASP-70Ab and WASP-84b, each of which orbits a bright star (V~10). WASP-69b is a bloated Saturn-mass planet (0.26 M$_{\rm Jup}$, 1.06 R$_{\rm ... [more ▼]We report the discovery of the transiting exoplanets WASP-69b, WASP-70Ab and WASP-84b, each of which orbits a bright star (V~10). WASP-69b is a bloated Saturn-mass planet (0.26 M$_{\rm Jup}$, 1.06 R$_{\rm Jup}$) in a 3.868-d period around an active mid-K dwarf. We estimate a stellar age of 1 Gyr from both gyrochronological and age-activity relations, though an alternative gyrochronological relation suggests an age of 3 Gyr. ROSAT detected X-rays at a distance of 60$\pm$27 arcsec from WASP-69. If the star is the source then the planet could be undergoing mass-loss at a rate of ~10$^{12}$g s$^{-1}$. This is 1-2 orders of magnitude higher than the evaporation rate estimated for HD 209458b and HD 189733b, both of which have exhibited anomalously-large Lyman-{\alpha} absorption during transit. WASP-70Ab is a sub-Jupiter-mass planet (0.59 M$_{\rm Jup}$, 1.16R$_{\rm Jup}$) in a 3.713-d orbit around the primary of a spatially-resolved G4+K3 binary, with a separation of 3.3 arcsec ($\geq$800 AU). We exploit the binary nature of the system to construct a H-R diagram, from which we estimate its age to be 9-10 Gyr. WASP-84b is a sub-Jupiter-mass planet (0.69 M$_{\rm Jup}$, 0.94 R$_{\rm Jup}\$) in an 8.523-d orbit around an active early-K dwarf. Of the transiting planets discovered from the ground to date, WASP-84b has the third-longest period. From a combination of gyrochronological and age-activity relations we estimate the age of WASP-84 to be ~1 Gyr. For both the active stars WASP-69 and WASP-84 we find a modulation of the radial velocities with a period similar to the photometrically-determined stellar rotation period. We fit the residuals with a low-order harmonic series and subtract the best fit from the RVs prior to deriving the system parameters. In each case the solution is essentially unchanged, with much less than a 1-{\sigma} change to the planetary mass. We found... [less ▲] Three irradiated and bloated hot Jupiters: WASP-76b, WASP-82b & WASP-90bWest, R. G.; Almenara, J.-M.; Anderson, D. R. et alE-print/Working paper (2013)We report three new transiting hot-Jupiter planets discovered from the WASP surveys combined with radial velocities from OHP/SOPHIE and Euler/CORALIE and photometry from Euler and TRAPPIST. All three ... [more ▼]We report three new transiting hot-Jupiter planets discovered from the WASP surveys combined with radial velocities from OHP/SOPHIE and Euler/CORALIE and photometry from Euler and TRAPPIST. All three planets are inflated, with radii 1.7-1.8 Rjup. All orbit hot stars, F5-F7, and all three stars have evolved, post-MS radii (1.7-2.2 Rsun). Thus the three planets, with orbits of 1.8-3.9 d, are among the most irradiated planets known. This reinforces the correlation between inflated planets and stellar irradiation. [less ▲]Detailed reference viewed: 4 (0 ULg) Les Draps de litDemoulin, Laurent E-print/Working paper (2013)Les Draps de lit est une pièce de théâtre inédite de Jean-Philippe Toussaint, antérieure à La Salle de bain. Elle est ici éditée avec un apparat critique: variantes et notes critiques.Detailed reference viewed: 8 (0 ULg) Physician Induced Demand for C-Sections: Does the Convenience Incentive Matter?Lefevre, Mélanie E-print/Working paper (2013)This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of cesareans to accommodate ... [more ▼]This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of cesareans to accommodate their own preferences for control of deliveries around holiday Mondays. Using a sample of more than 1,300,000 deliveries, I can precisely estimate that the induced demand due to convenience is close to zero. While I replicate previous results of lower C-section rates on leisure periods, I show that they are due to the way doctors schedule planned cesareans rather than to an induced demand for reason of physicians' convenience. [less ▲]Detailed reference viewed: 11 (3 ULg) Chicago Gospel Festival June 2013Sacré, Robert E-print/Working paper (2013)Compte-rendu avec photosDetailed reference viewed: 5 (0 ULg) Luhman 16AB: A Remarkable, Variable L/T Transition Binary 2 pc from the SunBurgasser, A. J.; Faherty, J.; Beletsky, Y. et alE-print/Working paper (2013)Luhman (2013) has reported the discovery of a brown dwarf binary system only 2.01+/-0.15 pc from the Sun. The binary is well-resolved with a projected separation of 1.5", and spectroscopic observations ... [more ▼]Luhman (2013) has reported the discovery of a brown dwarf binary system only 2.01+/-0.15 pc from the Sun. The binary is well-resolved with a projected separation of 1.5", and spectroscopic observations have identified the components as late-L and early-T dwarfs. The system exhibits several remarkable traits, including a "flux reversal", where the T dwarf is brighter over 0.9-1.3 micron but fainter at other wavelengths; and significant (~10%) short-period (~4.9 hr) photometric variability with a complex light curve. These observations suggest spatial variations in condensate cloud structure, which is known to evolve substantially across the L dwarf/T dwarf transition. Here we report preliminary results from a multi-site monitoring campaign aimed at probing the spectral and temporal properties of this source. Focusing on our spectroscopic observations, we report the first detections of NIR spectral variability, present detailed analysis of K I lines that confirm differences in condensate opacity between the components; and preliminary determinations of radial and rotational velocities based on high-resolution NIR spectroscopy. [less ▲]Detailed reference viewed: 8 (0 ULg) Discovery of WASP-65b and WASP-75b: Two Hot Jupiters Without Highly Inflated RadiiGómez Maqueo Chew, Y.; Faedi, F.; Pollacco, D. et alE-print/Working paper (2013)We report the discovery of two transiting hot Jupiters, WASP-65b (M_pl = 1.55 +/- 0.16 M_J; R_pl = 1.11 +/- 0.06 R_J), and WASP-75b (M_pl = 1.07 +/- 0.05 M_J; R_pl = 1.27 +/- 0.05 R_J). They orbit their ... [more ▼]We report the discovery of two transiting hot Jupiters, WASP-65b (M_pl = 1.55 +/- 0.16 M_J; R_pl = 1.11 +/- 0.06 R_J), and WASP-75b (M_pl = 1.07 +/- 0.05 M_J; R_pl = 1.27 +/- 0.05 R_J). They orbit their host star every 2.311, and 2.484 days, respectively. The planet host WASP-65 is a G6 star (T_eff = 5600 K, [Fe/H] = -0.07 +/- 0.07, age > 8 Gyr); WASP-75 is an F9 star (T_eff = 6100 K, [Fe/H] = 0.07 +/- 0.09, age of 3 Gyr). WASP-65b is one of the densest known exoplanets in the mass range 0.1 and 2.0 M_J (rho_pl = 1.13 +/- 0.08 rho_J), a mass range where a large fraction of planets are found to be inflated with respect to theoretical planet models. WASP-65b is one of only a handful of planets with masses of around 1.5 M_J, a mass regime surprisingly underrepresented among the currently known hot Jupiters. The radius of Jupiter-mass WASP-75b is slightly inflated (< 10%) as compared to theoretical planet models with no core, and has a density similar to that of Saturn (rho_pl = 0.52 +/- 0.06 rho_J). [less ▲]Detailed reference viewed: 10 (1 ULg) Search for a habitable terrestrial planet transiting the nearby red dwarf GJ 1214Gillon, Michaël ; Demory, B.-O.; Madhusudhan, N. et alE-print/Working paper (2013)High-precision eclipse spectrophotometry of transiting terrestrial exoplanets represents a promising path for the first atmospheric characterizations of habitable worlds and the search for life outside ... [more ▼]High-precision eclipse spectrophotometry of transiting terrestrial exoplanets represents a promising path for the first atmospheric characterizations of habitable worlds and the search for life outside our solar system. The detection of terrestrial planets transiting nearby late-type M-dwarfs could make this approach applicable within the next decade, with near-to-come general facilities. In this context, we previously identified GJ 1214 as a high-priority target for a transit search, as the transit probability of a habitable planet orbiting this nearby M4.5 dwarf would be significantly enhanced by the transiting nature of GJ 1214 b, the super-Earth already known to orbit the star. Basing on this observation, we have set-up an ambitious high-precision photometric monitoring of GJ 1214 with the Spitzer Space Telescope to probe its entire habitable zone in search of a transiting planet as small as Mars. We present here the results of this transit search. Unfortunately, we did not detect any second transiting planet. Assuming GJ 1214 hosts a habitable planet larger than Mars, our global analysis of the whole Spitzer dataset leads to a posterior no-transit probability >=97%. Our analysis allows us to significantly improve the characterization of GJ 1214 b, to measure its occultation depth to be 70+-35 ppm at 4.5 microns, and to constrain it to be smaller than 205ppm (3-sigma upper limit) at 3.6 microns. In agreement with the plethora of transmission measurements published so far for GJ 1214 b, these emission measurements are consistent with both a metal-rich and a cloudy hydrogen-rich atmosphere. [less ▲]Detailed reference viewed: 8 (0 ULg) Blues on The Fox , Blues Festival Aurora June 2013Sacré, Robert E-print/Working paper (2013)Detailed reference viewed: 18 (3 ULg) Do consumers pay more for what they value more? The case of local milk-based dairy products in SenegalLefevre, Mélanie E-print/Working paper (2013)Senegalese consumers seem to prefer local fresh milk-based dairy products rather than the ones produced with imported powder. However, market prices of both products do not appear to be different. This ... [more ▼]Senegalese consumers seem to prefer local fresh milk-based dairy products rather than the ones produced with imported powder. However, market prices of both products do not appear to be different. This paper addresses this puzzle. First, I confirm the preference for local products. Using choice-based-conjoint data, I evaluate that Senegalese consumers are willing to pay a positive and significant premium for these products. Then, I identify the determinants of prices, based on a unique dataset of milk products characteristics. Evidence suggests that consumers' misinformation regarding the product composition prevents them from allocating a higher price to local milk-based products. [less ▲]Detailed reference viewed: 11 (4 ULg) L'élargissement vers la Croatie : un succès de la diplomatie européenneLika, Liridon E-print/Working paper (2013)Ce 1er juillet 2013, après six années de négociations avec l’Union européenne (UE) et de réformes laborieuses, la Croatie deviendra le 28ème État membre à part entière de la famille européenne. Après la ... [more ▼]Ce 1er juillet 2013, après six années de négociations avec l’Union européenne (UE) et de réformes laborieuses, la Croatie deviendra le 28ème État membre à part entière de la famille européenne. Après la Slovénie, membre depuis 2004, il s’agit du deuxième pays sortant de la dissolution violente de l’ex-Yougoslavie à rejoindre l’UE. Contrairement à son voisin slovène où les hostilités n’ont duré que quelques jours, la Croatie a connu plusieurs années de guerre et de destruction. Raison pour laquelle elle a été confrontée à une longue période de transition. Depuis son indépendance en 1991, tous les gouvernements croates ont engagé, un processus de consolidation de leur État. Ensuite ils ont consacré leur force à l’adhésion de leur pays à l’Organisation du traité de l’Atlantique Nord (OTAN), concrétisée en 2009, enfin ils ont travaillé à leur entrée dans l’UE. Mais quel intérêt l’Union a-t-elle à voir ces pays la rejoindre ? [less ▲]Detailed reference viewed: 43 (11 ULg) The HARPS search for southern extra-solar planets. XXXIV. A planetary system around the nearby M dwarf GJ163, with a super-Earth possibly in the habitable zoneBonfils, X.; Lo Curto, G.; Correia, A. C. M. et alE-print/Working paper (2013)The meter-per-second precision achieved by today velocimeters enables the search for 1-10 M_Earth planets in the habitable zone of cool stars. This paper reports on the detection of 3 planets orbiting ... [more ▼]The meter-per-second precision achieved by today velocimeters enables the search for 1-10 M_Earth planets in the habitable zone of cool stars. This paper reports on the detection of 3 planets orbiting GJ163 (HIP19394), a M3 dwarf monitored by our ESO/HARPS search for planets. We made use of the HARPS spectrograph to collect 150 radial velocities of GJ163 over a period of 8 years. We searched the RV time series for coherent signals and found 5 distinct periodic variabilities. We investigated the stellar activity and casted doubts on the planetary interpretation for 2 signals. Before more data can be acquired we concluded that at least 3 planets are orbiting GJ163. They have orbital periods of P_b=8.632+-0.002, P_c=25.63+-0.03 and P_d=604+-8 days and minimum masses msini = 10.6+-0.6, 6.8+-0.9, and 29+-3 M_Earth, respectively. We hold our interpretations for the 2 additional signals with periods P_(e)=19.4 and P_(f)=108 days. The inner pair presents an orbital period ratio of 2.97, but a dynamical analysis of the system shows that it lays outside the 3:1 mean motion resonance. GJ163c, in particular, is a super-Earth with an equilibrium temperature of T_eq = (302+-10) (1-A)^(1/4) K and may lie in the so called habitable zone for albedo values (A=0.34-0.89) moderately higher than that of Earth (A_Earth=0.2-0.3). [less ▲]Detailed reference viewed: 6 (0 ULg) Image de l'autre, lieux communs et stéréotypes: Français et Belges francophones au milieu du XXe siècleLanneau, Catherine E-print/Working paper (2013)Detailed reference viewed: 64 (10 ULg) Fast-evolving weather for the coolest of our two new substellar neighboursGillon, Michaël ; Triaud, A. H. M. J.; Jehin, Emmanuel et alE-print/Working paper (2013)We present the results of an intense photometric monitoring in the near-infrared (~0.9 microns) with the TRAPPIST robotic telescope of the newly discovered binary brown dwarf WISE J104915.57-531906.1, the ... [more ▼]We present the results of an intense photometric monitoring in the near-infrared (~0.9 microns) with the TRAPPIST robotic telescope of the newly discovered binary brown dwarf WISE J104915.57-531906.1, the third closest system to the Sun at a distance of only 2 pc. Our twelve nights of photometric time-series reveal a quasi-periodic (P = 4.87+-0.01 h) variability with a maximal peak-peak amplitude of ~11% and strong night-to-night evolution. We attribute this variability to the rotational modulation of fast-evolving weather patterns in the atmosphere of the coolest component (~T1-type) of the binary. No periodic signal is detected for the hottest component (~L8-type). For both brown dwarfs, our data allow us to firmly discard any unique transit during our observations for planets >= 2 Rearth. For orbital periods smaller than ~9.5 h, transiting planets are excluded down to an Earth-size. [less ▲]Detailed reference viewed: 6 (2 ULg) SOUTHERN BLUES NIGHT , Heerlen (NL) 17e ed. , 15 mars 2013Sacré, Robert E-print/Working paper (2013)C.R. de la 17e Southern Blues Night , le 15 mars 2013 à Heerlen ( Nl) + photos ; Khalif Wailin' Walter , Mud Morganfield, Heritage Blues Orchestra, James Harman, Enrico Crivellaro, Gene Taylor, ....Detailed reference viewed: 9 (0 ULg) Page de Beckett et Beckett de PageDemoulin, Laurent E-print/Working paper (2013)Compte rendu du livre de Martin Page L'Apiculture selon Samuel Beckett.Detailed reference viewed: 5 (1 ULg) Compte rendu de Claude Simon: SituationsDemoulin, Laurent E-print/Working paper (2013)Compte rendu du passionnant ouvrage dirigé par Paul Dirkx et Pascal Mougin au sujet de Claude Simon. Esquisse de réflexion sur la clôture du texte.Detailed reference viewed: 14 (3 ULg) Gravitationall lensing evidence against extended dark matter halosMagain, Pierre ; Chantry, Virginie E-print/Working paper (2013)It is generally thought that galaxies are embedded in dark matter halos extending well beyond their luminous matter. The existence of these galactic halos is mainly derived from the larger than expected ... [more ▼]It is generally thought that galaxies are embedded in dark matter halos extending well beyond their luminous matter. The existence of these galactic halos is mainly derived from the larger than expected velocities of stars and gas in the outskirts of spiral galaxies. Much less is known about dark matter around early-type (elliptical or lenticular) galaxies. We use gravitational lensing to derive the masses of early-type galaxies deflecting light of background quasars. This provides a robust measurement of the total mass within the Einstein ring, a circle whose diameter is comparable to the separation of the different quasar images. We find that the mass-to-light ratio of the lensing galaxies does not depend on radius, from inner galactic regions out to several half-light radii. Moreover, its value does not exceed the value predicted by stellar population models by more than a factor two, which may be explained by baryonic dark matter alone, without any need for exotic matter. Our results thus suggest that, if dark matter is present in early-type galaxies, its amount does not exceed the amount of luminous matter and its density follows that of luminous matter, in sharp contrast to what is found from rotation curves of spiral galaxies. [less ▲]Detailed reference viewed: 19 (3 ULg) FAO Training in Crop Yield Forecasting. Crop Yield Forecasting Methodology Enhancement – Remote sensing. Erevan 21 - 25 January 2013.Denis, Antoine E-print/Working paper (2013)Power point presentation of the FAO training "Crop Yield Forecasting Methodology Enhancement – Remote sensing", held in Erevan, Armenia, 21 - 25 January 2013 at ARMSTATEHYDROMET. The main objective of ... [more ▼]Power point presentation of the FAO training "Crop Yield Forecasting Methodology Enhancement – Remote sensing", held in Erevan, Armenia, 21 - 25 January 2013 at ARMSTATEHYDROMET. The main objective of this training was the improvement of the Crop Yield Forecasting System (CYFS) in Armenia by introducing a new approach for satellite data integration (use of TIMESAT software and METOP AVHRR NDVI images). This training was held in the framework of the "EC/FAO Programme on Information Systems to Improve Food Security Decision-Making in the European Neighbourhood Policy (ENP) East Area GCP/GLO/275/EC". [less ▲]Detailed reference viewed: 39 (4 ULg) Médias et communication politique : la presse, l'Open Vld et l'impôt sur la fortuneGeuens, Geoffrey E-print/Working paper (2013)Detailed reference viewed: 20 (7 ULg) Some misunderstood or unknown tricks (VII) (LaTeX)Merciadri, Luca E-print/Working paper (2013)This time, as habitually, we shall see some tricks: 2. Putting two itemizations on the same line, 3. Using footnotes in boxes, 4. Dealing with PDF cut-and-past and search functionalities, even when you ... [more ▼]This time, as habitually, we shall see some tricks: 2. Putting two itemizations on the same line, 3. Using footnotes in boxes, 4. Dealing with PDF cut-and-past and search functionalities, even when you are using accented characters, 5. Making a distinction with \overline for propositional logic formulae, 6. Referring to \labels by long names. We will then discuss some problems people often face when dealing with many figures, and, more generally, floats, in reports. Finally, we will deal with a Beamer scheme which aims at using a single file for both a presentation, and the related report. [less ▲]Detailed reference viewed: 61 (30 ULg) L’écriture au présent de Thierry HorguelinDemoulin, Laurent E-print/Working paper (2013)Les notations prises sur le vif par Thierry Horguelin portent un regard singulier sur notre quotidien.Detailed reference viewed: 18 (0 ULg) Spitzer Observations of GJ3470b: a Very Low-density Neptune-size Planet Orbiting a Metal-rich M dwarfDemory, Brice-Olivier; Torres, Guillermo; Neves, Vasco et alE-print/Working paper (2013)We present Spitzer/IRAC 4.5-micron transit photometry of GJ3470b, a Neptune-size planet orbiting a M1.5 dwarf star with a 3.3-day period recently discovered in the course of the HARPS M-dwarf survey. We ... [more ▼]We present Spitzer/IRAC 4.5-micron transit photometry of GJ3470b, a Neptune-size planet orbiting a M1.5 dwarf star with a 3.3-day period recently discovered in the course of the HARPS M-dwarf survey. We refine the stellar parameters by employing purely empirical mass-luminosity and surface brightness relations constrained by our updated value for the mean stellar density, and additional information from new near-infrared spectroscopic observations. We derive a stellar mass of M_star = 0.539+0.047-0.043 M_sun and a radius of R_star = 0.568+0.037-0.031 R_sun. We determine the host star of GJ3470b to be metal-rich, with a metallicity of [Fe/H] = +0.20 +/- 0.10 and an effective temperature of Teff = 3600 +/- 100 K. The revised stellar parameters yield a planetary radius R_pl = 4.83+0.22-0.21 R_Earth that is 13 percent larger than the value previously reported in the literature. We find a planetary mass M_pl = 13.9+1.5-1.4 M_Earth that translates to a very low planetary density, rho_pl = 0.72+0.13-0.12 gcm-3, which is 33% smaller than the original value. With a mean density half of that of GJ436b, GJ3470b is an example of a very low-density low-mass planet, similar to Kepler-11d, Kepler-11e, and Kepler-18c but orbiting a much brighter nearby star that is more conducive to follow-up studies. [less ▲]Detailed reference viewed: 13 (1 ULg) Les permis ratifiés par le législateur en Région wallonne (« DAR ») mis en échec par la Cour de justice de l’Union européenne et la Cour constitutionnelleDelnoy, Michel E-print/Working paper (2013)Detailed reference viewed: 39 (15 ULg) Connecting the dots for social value: A review on social networks and social entrepreneurshipDufays, Frédéric ; Huybrechts, Benjamin E-print/Working paper (2013)The emergence of social entrepreneurship has been explained at the macro-level (socioeconomic drivers), at the meso-level (concepts such as opportunity), and at the micro-level (motivations and intentions ... [more ▼]The emergence of social entrepreneurship has been explained at the macro-level (socioeconomic drivers), at the meso-level (concepts such as opportunity), and at the micro-level (motivations and intentions of social entrepreneurs). In this conceptual article, we argue that the sociology of social networks may contribute to explain how and why social entrepreneurship arises by bridging micro- and macro-levels of analysis. We identify four different usages of the social network concept in the social entrepreneurship literature: embeddedness of social entrepreneurship, collective social entrepreneurship, networking as a critical skill or activity of social entrepreneurship, and finally networking and the creation of social capital as a goal of social entrepreneurship. Theoretical frameworks explaining the emergence of conventional entrepreneurship with a social network lens are identified. These are evaluated with regard to social entrepreneurship and suggested to constitute an important source of inspiration for future research. [less ▲]Detailed reference viewed: 33 (2 ULg) Pregnancy-Associated Glycoprotein A-62 kDa [Fragment] from Dama dama placenta - Accession number C0HJC7Bériot, Mathilde ; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et alE-print/Working paper (2013)N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.Detailed reference viewed: 13 (0 ULg) Pregnancy-Associated Glycoprotein B-56 kDa [Fragment] from Dama dama placenta - Accession number C0HJC8Bériot, Mathilde ; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et alE-print/Working paper (2013)N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.Detailed reference viewed: 14 (0 ULg) Pregnancy-Associated Glycoprotein C-39 kDa [Fragment] from Dama dama placenta - Accession number C0HJC9Bériot, Mathilde ; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et alE-print/Working paper (2013)N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.Detailed reference viewed: 9 (0 ULg) Pregnancy-Associated Glycoprotein D-56 kDa [Fragment] from Dama dama placenta - Accession number C0HJD0Bériot, Mathilde ; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et alE-print/Working paper (2013)N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.Detailed reference viewed: 10 (0 ULg) Alpha-2-HS-glycoprotein [Fragment] from Dama dama placenta - Accession number C0HJD1Bériot, Mathilde ; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et alE-print/Working paper (2013)N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.Detailed reference viewed: 13 (1 ULg) Serum albumin [Fragment] from Dama dama placenta - Accession number C0HJD2Bériot, Mathilde ; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et alE-print/Working paper (2013)N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.Detailed reference viewed: 16 (2 ULg) Health Status, Disability and Retirement Incentives in BelgiumJousten, Alain ; Perelman, Sergio ; Lefebvre, Mathieu E-print/Working paper (2013)Many Belgian retire well before the statutory retirement age. Numerous exit routes from the labor force can be identified: old‐age pensions, conventional early retirement, disability insurance, and ... [more ▼]Many Belgian retire well before the statutory retirement age. Numerous exit routes from the labor force can be identified: old‐age pensions, conventional early retirement, disability insurance, and unemployment insurance are the most prominent ones. We analyze the retirement decision of Belgian workers adopting an option value framework, and pay special attention to the role of health status. We estimate probit models of retirement using data from SHARE. The results show that health and incentives matter in the decision to exit from the labor market. Based on these results, we simulate the effect of potential reforms on retirement. [less ▲]Detailed reference viewed: 11 (0 ULg) Quelle justice fiscale au niveau foncier ?Xhignesse, Guillaume ; Bourgeois, Marc E-print/Working paper (2013)Cette contribution a pour objectif de stimuler la discussion relative à la réforme du régime de la fiscalité immobilière en Belgique. Les auteurs y exposent le contexte juridique dans lequel s'inscrit une ... [more ▼]Cette contribution a pour objectif de stimuler la discussion relative à la réforme du régime de la fiscalité immobilière en Belgique. Les auteurs y exposent le contexte juridique dans lequel s'inscrit une telle réforme, ainsi que les enjeux principaux à prendre en considération. Une série de propositions sont également énoncées. [less ▲]Detailed reference viewed: 126 (54 ULg) Some misunderstood or unknown LaTeX tricks (VI)Merciadri, Luca E-print/Working paper (2012)Customizing a document class is important in the LaTeX world. We will consider two examples of this using the lettre document class. Next, we will consider a small fraction of a bigger LaTeX problem: the ... [more ▼]Customizing a document class is important in the LaTeX world. We will consider two examples of this using the lettre document class. Next, we will consider a small fraction of a bigger LaTeX problem: the details of character encoding. [less ▲]Detailed reference viewed: 17 (3 ULg) Is dark matter made of mirror matter? Evidence from cosmological dataCiarcelluti, Paolo; Wallemacq, Quentin E-print/Working paper (2012)We present new fast numerical simulations of cosmic microwave background and large scale structure in the case in which the cosmological dark matter is made entirely or partly of mirror matter. We ... [more ▼]We present new fast numerical simulations of cosmic microwave background and large scale structure in the case in which the cosmological dark matter is made entirely or partly of mirror matter. We consider scalar adiabatic primordial perturbations at linear scales in a flat Universe. The speed of the simulations allows us for the first time to use Markov Chain Monte Carlo analyses to constrain the mirror parameters. A Universe with pure mirror matter can fit very well the observations, equivalently to the case of an admixture with cold dark matter. In both cases, the analyses show a clear indication of the presence of a consistent amount of mirror dark matter, 0.05 < Ω_{mirror} h^2 < 0.12. [less ▲]Detailed reference viewed: 30 (6 ULg) Dominique A trois foisDemoulin, Laurent E-print/Working paper (2012)Triple actualité pour Dominique A: un nouveau disque, une tournée de concerts, un livre dans lequel il réfléchit, de façon ouverte et nuancée, à la question de l'identité et des origines.Detailed reference viewed: 10 (0 ULg) Comoment Risk and Stock ReturnsLambert, Marie ; Hübner, Georges E-print/Working paper (2012)Detailed reference viewed: 23 (3 ULg) Les littératures selon Nicolas AncionDemoulin, Laurent E-print/Working paper (2012)Compte rendu du roman de Nicolas Ancion "La Cravate de Simenon" paru dans une collection destinée à l'apprentissage du français.Detailed reference viewed: 20 (0 ULg) Risk Horizon and Expected Market ReturnsHübner, Georges ; Lejeune, Thomas E-print/Working paper (2012)The paper proposes an equilibrium asset pricing model that accounts of the incomplete information on returns distribution and investors' preferences. Only moments up to order four of unknown unconditional ... [more ▼]The paper proposes an equilibrium asset pricing model that accounts of the incomplete information on returns distribution and investors' preferences. Only moments up to order four of unknown unconditional distribution can be observed, and the model does not impose that portfolio diversi fication or moments preference should hold. Using Chebyshev-type of inequalities, an intuitive risk measure (risk horizon) is introduced with reference to the speed of convergence of a security's mean return to its expectations. By an arbitrage argument, this risk measure is related to the horizon of treasury securities in a system of equations that allows the calibration of the model parameters using term structure information. In particular, the expected return on the market portfolio can be endogenously estimated inside this system. The model calibration on U.S. market data provides plausible parameters estimates and interesting cyclical patterns in the time series of the expected return. The empirical relevance of these estimates is examined with tests of statistical and economic predictive ability for stock excess returns. The results provide signi ficant evidence on the added value of the estimates when compared to popular predictors found in the literature (see a.o. Lettau and Ludvigson, 2001; Rapach and Wohar, 2006; Goyal and Welch, 2008). [less ▲]Detailed reference viewed: 17 (2 ULg) Vers une typologie de la réflexivitéDemoulin, Laurent E-print/Working paper (2012)Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont ... [more ▼]Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont étonnamment divers, tant en ce qui concerne leur structure que les effets produits. C’est pourquoi l’on se propose de les classer en six catégories distinctes : réflexivité autotélique, réflexivité poétique, réflexivité linguistique, réflexivité de l’énonciateur, réflexivité conative et réflexivité référentielle. [less ▲]Detailed reference viewed: 30 (1 ULg) NEW CHALLENGES FOR 21ST CENTURY COMPETITION AUTHORITIESPetit, Nicolas E-print/Working paper (2012)This paper discusses challenges for competition authorities in the 21st century. Those challenges were identified on the basis of a statistical review of the articles published since January 2011 in five ... [more ▼]This paper discusses challenges for competition authorities in the 21st century. Those challenges were identified on the basis of a statistical review of the articles published since January 2011 in five major antitrust law journals. The assumption underlying this literature review is that the topics that statistically attract the most the attention from contemporary antitrust scholars are those that will likely constitute the main challenges for 21st century competition authorities. [less ▲]Detailed reference viewed: 19 (0 ULg) Organizational and Institutional Arrangements for e-Government : A Preliminary Report on Contemporary IT Management Approaches in US State GovernmentsMarkus, M. Lynne; Jacobson, Dax D.; Bui, Quang Neo et alE-print/Working paper (2012)The success of e-government is believed to depend in part on the organizational and institutional arrangements that governments enact for the management of their IT resources. This paper develops the ... [more ▼]The success of e-government is believed to depend in part on the organizational and institutional arrangements that governments enact for the management of their IT resources. This paper develops the conceptualization of IT management arrangements by considering possible interactions between two dimensions — 1) the organization of IT activities and 2) control over decisions about IT activities (also known as governance) — for each of two categories of IT activities — 1) IT projects (such as website development) and 2) IT services (such as the operation of networks). In addition, the paper provides preliminary empirical evidence obtained from applying this expanded conceptualization in the context of American state governments. Many states appear to employ centralization of IT activities to offset decentralization of IT control and vice versa. Consequently, neither dimension alone provides a good characterization of governmental IT management arrangements. These findings have the potential to enhance our understanding of the barriers to, and enablers of, e-government success. [less ▲]Detailed reference viewed: 45 (16 ULg) Higher-Moment Risk Exposures in Hedge FundsLambert, Marie ; Hübner, Georges ; Papageorgiou, NicolasE-print/Working paper (2012)The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model ... [more ▼]The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model with location, trading and higher-moment factors in order to describe the dynamics of the Equity Hedge (Market Neutral, Short Selling and Long/Short strategies), Event Driven, Relative Value, and Funds of Hedge Funds styles. The volatility, skewness and kurtosis implied in the US options markets are used by Hedge Fund managers as instruments to anticipate market movements. Managers should adjust their market exposure in response to variations in the implied higher moments. We show that higher-moment premia improve a conditional asset pricing model both in terms of explanatory power (R-squares and Schwarz criterion) and specification errors across all Hedge Fund styles. [less ▲]Detailed reference viewed: 25 (5 ULg) Summer 2012 & The Blues - Chicago Blues Festival , Juin 2012Sacré, Robert E-print/Working paper (2012)Detailed reference viewed: 10 (0 ULg) Social Security, Ageing and Economic IntegrationArtige, Lionel ; Dedry, Antoine; Pestieau, Pierre E-print/Working paper (2012)Detailed reference viewed: 16 (1 ULg) The EMES Approach of Social Enterprise in a Comparative PerspectiveDefourny, Jacques ; Nyssens, MartheE-print/Working paper (2012)Detailed reference viewed: 14 (2 ULg) Summer 2012 & The blues 2012 pt 2 - Aurora's Blues on the Fox, June 2012Sacré, Robert E-print/Working paper (2012)Detailed reference viewed: 2 (0 ULg) Notes éparses d'un lecteur enthousiasteDemoulin, Laurent E-print/Working paper (2012)Compte rendu de "Carnet de Corée", ouvrage de Serge Delaive, mêlant littérature et photographies au sujet de trois voyages effectués en Corée sur les traces de la mère de sa compagne.Detailed reference viewed: 12 (0 ULg) De nieuwe fiscale antimisbruikregel en de gevolgen voor vermogensplanningBourgeois, Marc ; Nollet, Aymeric E-print/Working paper (2012)Detailed reference viewed: 29 (3 ULg) A New Shift-Share MethodArtige, Lionel ; Van Neuss, Leif E-print/Working paper (2012)Detailed reference viewed: 39 (14 ULg) Spirit of 66 - Temple des exclusivités ( Mississippi Houndbloods, Alvin Youngblood Hart, Ian Siegal)Sacré, Robert E-print/Working paper (2012)Detailed reference viewed: 16 (0 ULg) Wanted ! Avez-vous vu ces plantes ? La conservation des plantes messicoles dans le cadre du Programme Agroenvironnemental wallonPiqueray, Julien ; Gilliaux, Valentin ; Mahy, Grégory E-print/Working paper (2012)Afin de mener à bien un projet de conservation des plantes messicoles menacées, la Faculté AgroBioTech de Gembloux appelle à diffuser vos observations de terrain au DEMNADetailed reference viewed: 17 (2 ULg) Generational Accounting in Belgium: Fiscal Sustainability at a GlanceDecoster, André; Flawinne, Xavier ; Vanleenhove, PieterE-print/Working paper (2012)Detailed reference viewed: 44 (10 ULg) Les Wallons du WisconsinLempereur, Françoise E-print/Working paper (2012)In the middle of the XIXe century, thousands of Walloon left Belgium to settle in Wisconsin, more than 3100 miles away.Detailed reference viewed: 22 (5 ULg) Ecaussinnes 2012 - Spring Blues FestivalSacré, Robert E-print/Working paper (2012)Compte-rendu du Spring Blues Festival d'Ecaussinnes, le 19 mai 2012Detailed reference viewed: 12 (0 ULg) Renforcer la formation en sciences humaines en réduisant l’histoire-géo : cherchez l’erreur!Jadoulle, Jean-Louis E-print/Working paper (2012)Cette "carte blanche" fait suite à la décision de la Ministre de l'Enseignement obligatoire, Marie-Dominique Simonet, de réviser les grilles - horaires de l'enseignement qualifiant. Elle reprend la teneur ... [more ▼]Cette "carte blanche" fait suite à la décision de la Ministre de l'Enseignement obligatoire, Marie-Dominique Simonet, de réviser les grilles - horaires de l'enseignement qualifiant. Elle reprend la teneur d'une lettre qui lui a été adressée et qui a été co-signée par plus de 140 enseignants, formateurs d'enseignants et membres de la société civile. [less ▲]Detailed reference viewed: 22 (1 ULg) Traffic Situation Assessment and Intervention Strategy of a Collision Avoidance System based on Galileo Satellite PositioningChristen, Fréderic ; Ewald, Christian; Eckstein, Lutz et alE-print/Working paper (2012)Nowadays, collision avoidance systems (CAS) are an intensive research topic since the majority of all traffic accidents are collisions that are caused due to inattention or unadjusted driving behavior of ... [more ▼]Nowadays, collision avoidance systems (CAS) are an intensive research topic since the majority of all traffic accidents are collisions that are caused due to inattention or unadjusted driving behavior of the driver. Up to date prototypic CAS are based on on-board environmental sensors, such as camera or radar systems, that scan the vehicle's surrounding environment in order to assess the situation's hazardousness. The functionality of the used sensors under varying environmental conditions and the limited sensor covering area require an enormous effort to ensure a reliable detection of obstacles, and thus limit the application of the systems. In order to expand the operating field of such systems, a Galileo-based CAS will be developed within the project ‘Galileo above’ (application centre for ground based traffic). This advanced driver assistance system (ADAS) detects surrounding vehicles that are on collision course and reacts autonomously, if the driver does not intervene to avoid the crash. For this purpose the system initiates an emergency stop and/or an emergency steering maneuver. For the development of the CAS the Galileo test centre automotiveGATE in Aldenhoven, Germany will be used. On this test area pseudolites will be installed which provide Galileo-like navigation signals. Thus, the development respectively tuning of Galileo-based vehicle systems will be enabled, so as to have them available on the market when the Galileo satellite system reaches its full operational capability (FOC). The focus of this paper is on the traffic situation assessment and intervention strategy of the CAS. This includes the perception and analysis of the driving situation, the detection of potential collision situation, the definition of an adequate system reaction and the planning of an evasion trajectory. Furthermore, an outlook on the model predictive control for longitudinal and/or lateral control (braking and/or steering maneuver) will be presented. [less ▲]Detailed reference viewed: 16 (4 ULg) Institutional Change and Legislative Stability: Explicit and Contested Decision-Making in the EU Council (1995-2010)Van Aken, Wim E-print/Working paper (2012)In contrast to general expectations the growth of EU membership as well as European treaty reform has not had any significant impact on the Council’s overall legislative and roll call activity. On the ... [more ▼]In contrast to general expectations the growth of EU membership as well as European treaty reform has not had any significant impact on the Council’s overall legislative and roll call activity. On the basis of a new dataset representing the total population of public roll calls and recorded votes in the Council this paper explains why the EU Council has been so successful in guaranteeing legislative and roll call stability between 1995 and 2010. The quantitative and qualitative analysis finds that frontloading legislation, changing voting behaviour, reinforcement of existing coalition patterns and the successful adjustment of newer Member States to the EU Council have contributed to the EU Council’s decision-making capacity during the observed 16 years. In explaining the apparent contradiction between institutional change and the Council’s legislative stability this paper contributes to our knowledge of the functioning, the decision-making processes and the geography of contestation in the EU Council. [less ▲]Detailed reference viewed: 42 (1 ULg) Extensions of superalgebras of Krichever-Novikov typeKreusch, Marie E-print/Working paper (2012)An explicit construction of central extensions of Lie superalgebras of Krichever-Novikov type is given. In the case of Jordan superalgebras related to the superalgebras of Krichever-Novikov type we ... [more ▼]An explicit construction of central extensions of Lie superalgebras of Krichever-Novikov type is given. In the case of Jordan superalgebras related to the superalgebras of Krichever-Novikov type we calculate a 1-cocycle with coefficients in the dual space. [less ▲]Detailed reference viewed: 51 (15 ULg) The size and book-to-market effects revisitedLambert, Marie ; Hübner, Georges E-print/Working paper (2012)Detailed reference viewed: 14 (2 ULg) L'économie sociale et coopérative dans la revue du CIRIEC, Annales de l'économie publique, sociale et coopérativeFecher-Bourgeois, Fabienne ; Lévesque, BenoîtE-print/Working paper (2012)Detailed reference viewed: 23 (7 ULg) SOUTHERN BLUES NIGHT Heerlen, Hollande) 2012Sacré, Robert E-print/Working paper (2012)Detailed reference viewed: 7 (0 ULg) Rossano Rosi: triangle amoureux et paternitéDemoulin, Laurent E-print/Working paper (2012)Compte rendu du roman de Rossano Rosi Stabat Pater paru aux Impressions nouvelles en mars 2012.Detailed reference viewed: 16 (2 ULg) Dans le discontinu de la vieDemoulin, Laurent E-print/Working paper (2012)Compte rendu du roman de Caroline Lamarche La Chienne de Naha paru chez Gallimard en janvier 2012.Detailed reference viewed: 12 (1 ULg) Motionless Memory and Slow Remembering. Towards an Historiographic Understanding of the Imperceptible Movement in 48 by Susana de Sousa DiasHamers, Jérémy E-print/Working paper (2012)Detailed reference viewed: 29 (5 ULg) EchecsDemoulin, Laurent E-print/Working paper (2012)Echecs est un roman inédit de Jean-Philippe Toussaint, antérieur à La Salle de bain. Il est ici édité avec un apparat critique: variantes et notes critiques.Detailed reference viewed: 15 (4 ULg) Oxford Centre for Evidence‐Based Medicine 2011 Levels of Evidence ‐ Traduction françaiseOCEBM Levels of Evidence Working Group; Durieux, Nancy ; Pasleau, Françoise et alE-print/Working paper (2012)Detailed reference viewed: 152 (4 ULg) Heinrich Rickert's Philosophy of History And Its Reception 1896-1936: An Annotated BibliographyDewalque, Arnaud E-print/Working paper (2012)Annotated bibliography of the main philosophical texts which testify the reception of Heinrich Rickert's much-discussed view on historical sciences from 1896 to 1936.Detailed reference viewed: 47 (2 ULg) Diversité linguistique et apprentissage des langues en milieu scolaire.Blondin, Christiane ; Goffin, Christelle ; Fagnant, Annick E-print/Working paper (2012)Detailed reference viewed: 83 (4 ULg) How to optimally load a set of containers into an aircraftSchyns, Michael ; Limbourg, Sabine ; Laporte, GilbertE-print/Working paper (2012)Detailed reference viewed: 43 (7 ULg) Accrued Pension Rights in Belgium: Microsimulation of ReformsJousten, Alain ; Perelman, Sergio ; Tarantchenko, Ekaterina et alE-print/Working paper (2012)Detailed reference viewed: 21 (8 ULg) Les enjeux prospectifs wallons à la lumière d’un dispositif participatifGuyot, Jean-Luc; Rieppi, Stéphane ; Van Cutsem, Michaël et alE-print/Working paper (2012)La prospective a souvent recours à la démarche participative. Fréquemment, dans son travail analytique, le prospectiviste fait intervenir les acteurs concernés par le système qu'il examine, que ceux-ci ... [more ▼]La prospective a souvent recours à la démarche participative. Fréquemment, dans son travail analytique, le prospectiviste fait intervenir les acteurs concernés par le système qu'il examine, que ceux-ci opèrent dans ce système ou qu’ils possèdent une expertise particulière par rapport à celui-ci. Dans la majorité des cas, cette intervention s’effectue au cours de l’exercice prospectif. Le présent working paper expose un autre type de situation : l’intervention et la participation des acteurs se placent ici en amont du travail prospectif, au moment de la délimitation des enjeux et des thématiques à considérer dans le cadre du développement d’un programme de recherche. L'expérience présentée par les auteurs, bien qu’elle recoure à l’utilisation d’un outil relativement classique en prospective, à savoir le Delphi, revêt un aspect original. Développée auprès de deux publics distincts, des équipes de recherche d’une part et des membres de l’administration wallonne, d’autre part, elle a permis d’identifier un certain nombre d’enjeux prospectifs majeurs pour la Wallonie et de définir des objets de recherche en rapport avec ces derniers. L'identification et la présentation de ces enjeux fait l’objet du présent texte. Dans un premier temps, celui-ci se propose de décrire le processus d’identification de ces enjeux et, dans un second temps, d’expliciter la nature de ceux-ci. [less ▲]Detailed reference viewed: 39 (3 ULg) Cinéma 3D: d'une révolution à l'autreThonon, Jonathan E-print/Working paper (2012)Detailed reference viewed: 8 (0 ULg) d'Hane-Steenhuyse (Charles-François)Vandersmissen, Jan E-print/Working paper (2012)Detailed reference viewed: 14 (1 ULg) Etienne Ydens, Histoire du S. Sacrement de Miracle, reposant à Bruxelles, en l’Eglise collegiale de S. Goudele, & des Miracles faictz par iceluy, Bruxelles : Rutger Velpius, 1605, in-8°.Adam, Renaud E-print/Working paper (2012)Detailed reference viewed: 5 (0 ULg) Réponse de Jean Des Roches aux critiques de son Mémoire sur les débuts de l’imprimerie dans les Pays-Bas méridionaux, 1777Adam, Renaud ; Hasquin, HervéE-print/Working paper (2012)Detailed reference viewed: 5 (0 ULg) Bringing Belgian public finances to a sustainable pathJousten, Alain ; Hoj, Jens; Kozluk, TomaszE-print/Working paper (2012)Economic growth is projected to be strengthening from mid-2011 onwards, but will be insufficient to restore the sustainability of public finances. The Belgian strategy to prefund ageing costs by ... [more ▼]Economic growth is projected to be strengthening from mid-2011 onwards, but will be insufficient to restore the sustainability of public finances. The Belgian strategy to prefund ageing costs by generating fiscal surpluses to bring down public debt was derailed by the global crisis. Restoring the strategy is a priority, especially as spreads on Belgian debt have increased. This will require cuts in public spending, improving efficiency of policies, containing the growth of ageing-related costs and making the tax system more conducive to growth. While past experiences, such as in the 1990s, have shown that successful large consolidations are feasible, the task seems even more difficult this time as potential growth will be muted and interest rates are likely to increase. In this context, a credible fiscal consolidation plan requires the participation of all governments. Its effectiveness can be strengthened by improving the fiscal framework, in particular by introducing multi-year budgets, annual expenditure rules consistent with long-term targets and an enhanced role of an independent fiscal policy watchdog [less ▲]Detailed reference viewed: 14 (2 ULg) Solvyns (François-Balthazar)Vandersmissen, Jan E-print/Working paper (2012)Detailed reference viewed: 15 (2 ULg) Jacques le fataliste entre romanesque et anti-roman. Une parodie des effets de réel du récit de voyage au XVIIIe siècleDaubercies, Laurence E-print/Working paper (2012)Detailed reference viewed: 40 (9 ULg) The Retirement of the Migrant Labor Force: Pension Portability and BeyondJousten, Alain E-print/Working paper (2012)The specificities of the workforce with a migrant background are often neglected in studies of retirement. Similarly, many studies of migration’s impact on pensions often focus on aggregate outcomes – ... [more ▼]The specificities of the workforce with a migrant background are often neglected in studies of retirement. Similarly, many studies of migration’s impact on pensions often focus on aggregate outcomes – system sustainability or distributive characteristics. The present paper provides a fresh look at the nexus between these two literatures. It discusses the impact of the European social security coordination mechanisms on individual decision‐making and on the functioning of social security systems – with a focus on retirement. The paper argues that such effects are non‐negligible and are likely to have major policy consequences. [less ▲]Detailed reference viewed: 10 (3 ULg) Low-rank optimization with trace norm penaltyMishra, Bamdev ; Meyer, Gilles ; Bach, Francis et alE-print/Working paper (2012)The paper addresses the problem of low-rank trace norm minimization. We propose an algorithm that alternates between fixed-rank optimization and rank-one updates. The fixed-rank optimization is ... [more ▼]The paper addresses the problem of low-rank trace norm minimization. We propose an algorithm that alternates between fixed-rank optimization and rank-one updates. The fixed-rank optimization is characterized by an efficient factorization that makes the trace norm differentiable in the search space and the computation of duality gap numerically tractable. The search space is nonlinear but is equipped with a particular Riemannian structure that leads to efficient computations. We present a second-order trust-region algorithm with a guaranteed quadratic rate of convergence. Overall, the proposed optimization scheme converges super-linearly to the global solution while still maintaining complexity that is linear in the number of rows of the matrix. To compute a set of solutions efficiently for a grid of regularization parameters we propose a predictor-corrector approach on the quotient manifold that outperforms the naive warm-restart approach. The performance of the proposed algorithm is illustrated on problems of low-rank matrix completion and multivariate linear regression. [less ▲]Detailed reference viewed: 46 (17 ULg) A Riemannian geometry for low-rank matrix completionMishra, Bamdev ; Karavadi, Adithya Apuroop; Sepulchre, Rodolphe E-print/Working paper (2012)We propose a new Riemannian geometry for fixed-rank matrices that is specifically tailored to the low-rank matrix completion problem. Exploiting the degree of freedom of a quotient space, we tune the ... [more ▼]We propose a new Riemannian geometry for fixed-rank matrices that is specifically tailored to the low-rank matrix completion problem. Exploiting the degree of freedom of a quotient space, we tune the metric on our search space to the particular least square cost function. At one level, it illustrates in a novel way how to exploit the versatile framework of optimization on quotient manifold. At another level, our algorithm can be considered as an improved version of LMaFit, the state-of-the-art Gauss-Seidel algorithm. We develop necessary tools needed to perform both first-order and second-order optimization. In particular, we propose gradient descent schemes (steepest descent and conjugate gradient) and trust-region algorithms. We also show that, thanks to the simplicity of the cost function, it is numerically cheap to perform an exact linesearch given a search direction, which makes our algorithms competitive with the state-of-the-art on standard low-rank matrix completion instances. [less ▲]Detailed reference viewed: 83 (17 ULg) Fixed-rank matrix factorizations and Riemannian low-rank optimizationMishra, Bamdev ; Meyer, Gilles ; Bonnabel, Silvere et alE-print/Working paper (2012)Motivated by the problem of learning a linear regression model whose parameter is a large fixed-rank non-symmetric matrix, we consider the optimization of a smooth cost function defined on the set of ... [more ▼]Motivated by the problem of learning a linear regression model whose parameter is a large fixed-rank non-symmetric matrix, we consider the optimization of a smooth cost function defined on the set of fixed-rank matrices. We adopt the geometric optimization framework of optimization on Riemannian matrix manifolds. We study the underlying geometries of several well-known fixed-rank matrix factorizations and then exploit the Riemannian geometry of the search space in the design of a class of gradient descent and trust-region algorithms. The proposed algorithms generalize our previous results on fixed-rank symmetric positive semidefinite matrices, apply to a broad range of applications, scale to high-dimensional problems and confer a geometric basis to recent contributions on the learning of fixed-rank non-symmetric matrices. We make connections with existing algorithms in the context of low-rank matrix completion and discuss relative usefulness of the proposed framework. Numerical experiments suggest that the proposed algorithms compete with the state-of-the-art and that manifold optimization offers an effective and versatile framework for the design of machine learning algorithms that learn a fixed-rank matrix. [less ▲]Detailed reference viewed: 22 (4 ULg) An expanding Universe without dark matter and dark energyMagain, Pierre E-print/Working paper (2012)Assuming that observers located inside the Universe measure a time flow which is different from the time appearing in the Friedmann-Lemaıtre equation, and determining this time flow such that the Universe ... [more ▼]Assuming that observers located inside the Universe measure a time flow which is different from the time appearing in the Friedmann-Lemaıtre equation, and determining this time flow such that the Universe always appears flat to these observers, we derive a simple cosmological model which allows to explain the velocity dispersions of galaxies in galaxy clusters without introducing dark matter. It also solves the horizon problem without recourse to inflation. Moreover, it explains the present acceleration of the expansion without any resort to dark energy and provides a good fit to the observations of distant supernovæ. Depending on the present value of the matter-energy density, we calculate an age of the Universe between 15.4 and 16.5 billion years, ignificantly larger than the 13.7 billion years of the standard CDM model. Our model has a slower expansion rate in the early epochs, thus leaving more time for the formation of structures such as stars and galaxies. [less ▲]Detailed reference viewed: 32 (2 ULg) Strategic bypass deterrenceBloch, Francis; Gautier, Axel E-print/Working paper (2012)In liberalized network industries, entrants can either compete for service using the existing infrastructure (access) or deploy their own infrastructure capacity (bypass). In this paper, we demonstrate ... [more ▼]In liberalized network industries, entrants can either compete for service using the existing infrastructure (access) or deploy their own infrastructure capacity (bypass). In this paper, we demonstrate that, under the threat of bypass, the access price set by an unregulated and vertically integrated incumbent is compatible with productive efficiency. This means that the entrant bypasses the existing infrastructure only if it can produce the network input more efficiently. We show that the incumbent lowers the access price compared to the ex-post efficient level to strategically deter inefficient bypass by the entrant. Accordingly, from a productive efficiency point of view, there is no need to regulate access prices when the entrant has the option to bypass. Despite that, we show that restricting the possibilities of access might be profitable for consumers and welfare because competition is fiercer under bypass. [less ▲]Detailed reference viewed: 16 (2 ULg) Les 70 ans de la mort de Stefan Zweig. Sous une forme esthétisante, se dissimulait un personnage complexe. Interview avec Achim KüpperKüpper, Achim ; Paquot, MichelE-print/Working paper (2012)Detailed reference viewed: 5 (0 ULg) La colonisation agricole des territoires ruraux du nord-ouest cambodgien : Pouvoirs, politiques paysannes et différenciations spatialesDiepart, Jean-Christophe ; Dupuis, DavidE-print/Working paper (2012)Detailed reference viewed: 1 (1 ULg) Rose-Marie François, L'Adieu, Une promenade douce-amèreDemoulin, Laurent E-print/Working paper (2011)Compte rendu du recueil de poèmes L'Adieu de Rose-Marie FrançoisDetailed reference viewed: 11 (2 ULg) Measuring poverty without the mortality paradoxLefebvre, Mathieu ; Pestieau, Pierre ; Ponthiere, Grégory E-print/Working paper (2011)Under income-differentiated mortality, poverty measures reflect not only the "true" poverty, but, also, the interferences or noise caused by the survival process at work. Such interferences lead to the ... [more ▼]Under income-differentiated mortality, poverty measures reflect not only the "true" poverty, but, also, the interferences or noise caused by the survival process at work. Such interferences lead to the Mortality Paradox: the worse the survival conditions of the poor are, the lower the measured poverty is. We examine several solutions to avoid that paradox. We identify conditions under which the extension, by means of a fictitious income, of lifetime income profiles of the prematurely dead neutralizes the noise due to differential mortality. Then, to account not only for the "missing" poor, but, also, for the "hidden" poverty (premature death), we use, as a fictitious income, the welfare-neutral income, making indifferent between life continuation and death. The robustness of poverty measures to the extension technique is illustrated with regional Belgian data. [less ▲]Detailed reference viewed: 10 (1 ULg) Evidence on the Determinants of Innovation in a Sample of Spanish firmsArtige, Lionel E-print/Working paper (2011)Detailed reference viewed: 7 (2 ULg) La "dictature" des marchés financiers : un trompe-l'œil médiatique. Social-démocratie, think tanks et communication politiqueGeuens, Geoffrey E-print/Working paper (2011)Detailed reference viewed: 44 (10 ULg) Politique fiscale: quelles perspectives à moyen terme?Jousten, Alain E-print/Working paper (2011)The paper discusses the medium term adequacy of belgian tax policy. The paper reviews the architecture of the current system as well as its recent reforms. It draws on international experience to ... [more ▼]The paper discusses the medium term adequacy of belgian tax policy. The paper reviews the architecture of the current system as well as its recent reforms. It draws on international experience to highlight the need for substantial structural reforms of the main tax instuments. [less ▲]Detailed reference viewed: 85 (16 ULg) Dubois La LibertéDemoulin, Laurent E-print/Working paper (2011)Compte rendu de l'ouvrage de Jacques Dubois Les Figures du désir.Detailed reference viewed: 11 (2 ULg) New Orleans Jazz & Heritage Festival 2011 - compte-renduSacré, Robert E-print/Working paper (2011)Detailed reference viewed: 12 (0 ULg) Intermediaries, transport costs and interlinked transactionsLefevre, Mélanie ; Tharakan, Joseph E-print/Working paper (2011)Transport costs play a key role in agricultural markets in developing countries and are one of the causes of poverty amongst farmers that are geographically isolated. Another characteristic of ... [more ▼]Transport costs play a key role in agricultural markets in developing countries and are one of the causes of poverty amongst farmers that are geographically isolated. Another characteristic of agricultural markets is that they often involve interlinked transactions. However, the existing theoretical literature on interlinked transactions does not take into account the existence of transport costs. This paper develops a model of input-output interlinked contracts between geographically dispersed farmers and a trader, whether this trader is for-profit or non-profit. We derive implications of imposing either uniform or mill pricing policies, as opposed to spatial price discrimination. Impact on profit, farmers' income, level of production, social welfare and regional disparities are investigated. [less ▲]Detailed reference viewed: 21 (1 ULg) 1 2 3 4