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See detailInfrared Electronic speckle pattern interferometry at 10 µm
Vandenrijt, Jean-François ULg; Georges, Marc ULg

in Osten, W.; Gorecki, C.; Novak, E. (Eds.) Optical Measurement Systems for Industrial Inspection V (2007, June)

Demonstration of electronic speckle pattern interferometry of opaque scattering objects at 10 µm wavelength using a commercial thermal-camera is presented for the first time to our knowledge. The idea of ... [more ▼]

Demonstration of electronic speckle pattern interferometry of opaque scattering objects at 10 µm wavelength using a commercial thermal-camera is presented for the first time to our knowledge. The idea of using a wavelength longer than the usual visible ones is to render such holographic displacement measurement techniques less sensitive to external perturbations. We have observed the rotation of a metallic plate and applied the phase-shifting technique for quantitative measurements [less ▲]

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See detailInfrared Holography
Georges, Marc ULg

Scientific conference (2014, April 11)

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See detailInfrared Imaging
Danchi, William; Lawson, Peter; Defrere, Denis ULg et al

in Lawson, P. R.; Traub, W. A.; Unwin, S. C. (Eds.) Exoplanet Community Report (2009)

A mid‐infrared mission would enable the detection of biosignatures of Earth‐like exoplanets around more than 150 nearby stars. The mid‐infrared spectral region is attractive for characterizing exoplanets ... [more ▼]

A mid‐infrared mission would enable the detection of biosignatures of Earth‐like exoplanets around more than 150 nearby stars. The mid‐infrared spectral region is attractive for characterizing exoplanets because contrast with the parent star brightness is more favorable than in the visible (10 million vs. 10 billion), and because mid‐infrared light probes deep into a planet’s troposphere. Furthermore, the mid‐infrared offers access to several strong molecular features that are key signs of life, and also provides a measure of the effective temperature and size of a planet. Taken together, an infrared mission plus a visible one would provide a nearly full picture of a planet, including signs of life; with a measure of mass from an astrometric mission, we would have a virtually complete picture. A small infrared mission would have several telescopes that are rigidly connected, with a science return from the detection and characterization of super‐Earth sized to larger planets near the HZ, plus a direct measure of the exozodi brightness in the HZ. In a large infrared mission, with formation‐flying telescopes, planets from an Earth‐twin and upwards in mass could be detected and characterized, as well as the exozodi. If proceeded by an astrometric mission, the detection phase could be skipped and the mission devoted to characterization, as in the visible case; lacking an astrometric mission, an infrared one could proceed alone, as was discussed for a visible coronograph, and with similar caveats. The technology needed for a large formation‐flying mission is similar to that for a small connected‐element one (e.g., cryogenics and detectors), with the addition of formationflying technology. The technology is now in hand to implement a probe‐scale mission; starlight suppression has even been demonstrated to meet the requirements of a flagship mission. However, additional development of formation‐flying technology is needed, particularly in‐space testing of sensors and guidance, navigation, and control algorithms. [less ▲]

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See detailInfrared Interferometric Gravity Darkening Observations of Vega with CHARA/FLUOR
Aufdenberg, J.; Mérand, A.; Coudé Du Foresto, V. et al

in Coudé du Foresto, Vincent; Rouan, Daniel; Rousset, Gérard (Eds.) Visions for Infrared Astronomy (2006, March)

We have obtained high-precision measurements of Vega at projected baselines between 103 m and 273 m with the CHARA Array using the (FLUOR) beam combiner in the K' band. A strongly gravity-darkened model ... [more ▼]

We have obtained high-precision measurements of Vega at projected baselines between 103 m and 273 m with the CHARA Array using the (FLUOR) beam combiner in the K' band. A strongly gravity-darkened model atmosphere is in general agreement with both our interferometric data and archival spectrophotometry. This model indicates that Vega is rotating at 91%ofitsangular break-uprateandthatthepole-to-equator effectivetemperaturedifference is 2250 K. [less ▲]

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See detailInfrared photometry and spectrophotometry of SN 1987A. I - March to October 1987 observations
Bouchet, P.; Slezak, E.; Le Bertre, T. et al

in Astronomy and Astrophysics. Supplement Series (1989), 80

IR (1-20 micron) observations, photometry, and narrow band spectrophotometry of SN 1987A obtained between March 16 and October 12, 1987, are presented. Variations of the bolometric luminosity are ... [more ▼]

IR (1-20 micron) observations, photometry, and narrow band spectrophotometry of SN 1987A obtained between March 16 and October 12, 1987, are presented. Variations of the bolometric luminosity are determined from IR and optical photometry. The spectral energy distribution, effective radius, and effective temperature of the hotter component are derived. Also, observations of hydrogen lines and CO emission are discussed. [less ▲]

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See detailInfrared photometry of SN 1987A - The first four months
Bouchet, P.; Le Bertre, Th; Manfroid, Jean ULg et al

in European Southern Observatory Astrophysics Symposia (1987)

The results of the first 4 mo of the ESO La Silla IR photometric monitoring program of SN 1987A. IR light curves are presented, and the IR data are combined with optical photometry to determine the ... [more ▼]

The results of the first 4 mo of the ESO La Silla IR photometric monitoring program of SN 1987A. IR light curves are presented, and the IR data are combined with optical photometry to determine the luminosity, the effective radius, and the effective temperature, and how they evolved. Particular attention is given to the IR excess which become apparent beginning less than 1 mo after the explosion. Three possible interpretations of the excess IR emission are presented: an IR echo from preexisting dust, thermal emission from dust that has just condensed from the ejecta, and free-free emission from the expanding ejecta. None of the models are entirely satisfactory. [less ▲]

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See detailInfrared remote sensing of atmosphere at the Jungfraujoch station - Evidence for global changes
Zander, Rodolphe ULg; Demoulin, Philippe ULg

in Putkonen, Jyri (Ed.) Proceedings of the IGARSS '91 - Remote Sensing, Global Monitoring for Earth Management, Espoo, Finland, June 3-6, 1991 (1991)

The thread imposed upon the earth"s atmosphere by anthropogenic activities is becoming well documented. Analyses of infrared solar observations carried out at the International Scientific Station of the ... [more ▼]

The thread imposed upon the earth"s atmosphere by anthropogenic activities is becoming well documented. Analyses of infrared solar observations carried out at the International Scientific Station of the Jungfraujoch, Switzerland, in 1950-51 and more intensively since the late 1970s have contributed to that documentation. This paper summarizes original findings arrived at so far and raises the need for intensive and coordinated observational programs during the 1990s. [less ▲]

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See detailInfrared Signature of DNA G-Quadruplexes in the Gas Phase
Gabelica, Valérie ULg; Rosu, Frédéric ULg; De Pauw, Edwin ULg et al

in Journal of the American Chemical Society (2008), 130(6), 1810-1

DNA oligonucleotide ions forming G-quadruplex structures were studied in the gas phase using IRMPD spectroscopy. Data interpretation on these large biomolecule ions was made using carefully chosen control ... [more ▼]

DNA oligonucleotide ions forming G-quadruplex structures were studied in the gas phase using IRMPD spectroscopy. Data interpretation on these large biomolecule ions was made using carefully chosen control experiments. The major finding is a fingerprint of hydrogen bonding in the gas phase in the guanine C6=O6 stretching mode, that allows probing the conservation of G-quartets in the gas phase. The experiments demonstrate the conservation of G-quadruplex hydrogen bonds in the human telomeric sequence d(TTAGGG)4. [less ▲]

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See detailThe infrared spectra of the Planetary Nebulae BD+30°3639, NGC 6572, and NGC 6543
Swings, Polydore ULg; Jose, P. D.

in Publications of the Astronomical Society of the Pacific [=PASP] (1949), 61

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See detailInfrared spectroscopic measurements of halogenated sink and reservoir gases in the stratosphere with the ATMOS instrument
Raper, O. F.; Farmer, C. B.; Zander, Rodolphe ULg et al

in Journal of Geophysical Research. Atmospheres (1987), 92(D8), 9851--9858

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See detailInfrared spectroscopic measurements of halogenated source gases in the stratosphere with the ATMOS instrument
Zander, Rodolphe ULg; Rinsland, C. P.; Farmer, C. B. et al

in Journal of Geophysical Research. Atmospheres (1987), 92(D8), 9836--9850

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See detailInfrared Spectroscopic Measurements of the Vertical Column Abundance of Sulfur Hexafluoride, SF6, From the Ground
Zander, Rodolphe ULg; Rinsland, C.P.; Demoulin, Philippe ULg

in Journal of Geophysical Research (1991), 96(D8), 15447-15454

The unresolved v3 band Q branch of sulfur hexafluoride, SF6, at 947.9 cm-1 has been identified and quantitatively analyzed in series of high-quality infrared solar spectra recorded at the International ... [more ▼]

The unresolved v3 band Q branch of sulfur hexafluoride, SF6, at 947.9 cm-1 has been identified and quantitatively analyzed in series of high-quality infrared solar spectra recorded at the International Scientific Station of the Jungfraujoch, Switzerland, and at the National Solar Observatory facility on Kitt Peak in Arizona. Series of monthly mean total vertical column abundances of SF6 above both stations, deduced from that feature with line-by-line nonlinear least squares fitting methods, are reported over the time intervals from June 1986 to June 1990 for the Jungfraujoch and from March 1981 to June 1990 for Kitt Peak. Assuming an exponential growth model for fitting these series of measurements, it is found that the vertical column abundances have increased at mean rates of 6.9 +- 2.8 %/yr above the Jungfraujoch (calculated columns of 2.99 x 10E13 molecules/cm2 in June 1986 and 3 94 x 10E13 molecules/cm2 in June 1990) and 6.6 +- 7.2 %/yr above Kitt Peak (calculated columns equal to 2.97 x 10E13 molecules/cm2 in June 1981 and 5.38 x 10E13 molecules/cm2 in June 1990), the uncertainties corresponding to 2 sigma confidence levels. These results are further discussed within the context of variability and compared with previously published measurements. [less ▲]

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See detailThe infrared spectrum of P Cygni
Swings, Polydore ULg

in Publications of the Astronomical Society of the Pacific [=PASP] (1944), 56

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See detailL’infrastructure éditoriale
Durand, Pascal ULg; Winkin, Yves ULg

in Berg Chr.; Halen P. (Eds.) Littératures belges de langue française (2000)

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See detailInfrastructure Reform in Developing Economies: Evidence from a Survey of Economic Performance Measures
Estache, Antonio; Perelman, Sergio ULg; Trujillo, Lourdes

in Coelli, Tim; Lawrence, Denis (Eds.) Performance Measurement and Regulation of Network Utilities (2007)

This paper surveys the growing literature on developing countries’ infrastructure performance measured through frontier analysis techniques. The focus is generally on assessments of operators’ efficiency ... [more ▼]

This paper surveys the growing literature on developing countries’ infrastructure performance measured through frontier analysis techniques. The focus is generally on assessments of operators’ efficiency and productivity growth as part of benchmarking exercises. Two broad types of benchmarks are identified in the literature. The first is based on cross-country or cross regional performance comparisons, the second compares performance before and after reforms, including privatization. These benchmarks are often used to assess the impact of potential or actual policy reforms in specific countries. In a growing number of instances, they are also being conducted in the context of tariff revisions to assess the efficiency gains that can be shared with users as part of these revisions. The main policy conclusions are that there is a difference in the performance effect of key reforms, in particular privatization, between the transport sector and the utilities sector but that generally incentive based regulation delivers efficiency in both sectors The main technical conclusion is that even if in developing economies data problems are constraining, these constraints are not as binding as often argued. [less ▲]

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See detailInfrastructures routières et développement socioeconomique dans le Mayombe (RDC)
Bonkena Bokombola, Papy ULg

Book published by L'Harmattan (2015)

La présente étude se consacre à la réflexion sur la corrélation entre l’infrastructure routière et le développement socioéconomique. C’est en s’appuyant sur un ensemble très large de variables sociales et ... [more ▼]

La présente étude se consacre à la réflexion sur la corrélation entre l’infrastructure routière et le développement socioéconomique. C’est en s’appuyant sur un ensemble très large de variables sociales et économiques jugées pertinentes que cette étude tente de contribuer à la construction d’un dispositif des variables aptes à saisir les changements entraînés par l’intervention du projet routier basée sur la technologie HIMO. Malgré quelques différences, la plupart des variables/indicateurs gardent les mêmes tendances évolutives dans ces différentes régions. Au-delà de notes de succès socioéconomique enregistré, des points d’attention subsistent et méritent des réflexions correctives dans une logique de poursuite et d’extension des activités de réhabilitation routière, notamment la persistance d’inégalités de genre dans les chances d’accès au travail, l’absence d’actions complémentaires devant appuyer les activités agropastorales et la persistance de la problématique de prise en charge de l’entretien du réseau réhabilité par les ressources tant locales, provinciales que nationales. L’étude repose essentiellement sur les données secondaires consignées dans les différents documents et rapports en les analysant dans une approche comparative avec les résultats obtenus par d’autres études réalisées en République Démocratique du Congo et dans d’autres régions en Afrique subsaharienne, dont particulièrement le Burkina Faso et le Bénin. [less ▲]

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See detailInfusing reflective practice in eLearning courses - can widgets help?
Verpoorten, Dominique ULg; Westera, W.; Specht, M.

in International Journal of Technology Enhanced Learning (2011), 3(1), 93-109

The paper investigates the potential of using widgets-based reflection amplifiers in e-learning courses. Reflection amplifiers are structured opportunities for students to examine and evaluate aspects of ... [more ▼]

The paper investigates the potential of using widgets-based reflection amplifiers in e-learning courses. Reflection amplifiers are structured opportunities for students to examine and evaluate aspects of their learning experience. The paper deliberately chooses a non-technical viewpoint. It takes the teachers' voices as a starting point. The study reports the results of a survey that asked open educational resources (OERs) course creators about their opinions on different types of reflection amplifiers. The outcomes demonstrate that several reflection techniques are recognised and acknowledged by these practitioners as being of relevance for their courses. Yet, practical application in their courses is quite rare. Results of the survey are subsequently used to inspect possible contributions of widgets technology to the implementation and dissemination of a selection of reflection techniques. The set-up of an experiment intended to test feasibility and relevance of widgets-based reflection amplifiers is eventually outlined. [less ▲]

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See detailInfusing SoTL components in staff training - A faculty development continuum at the university of Liège
Verpoorten, Dominique ULg; Jérôme, Françoise ULg; Delfosse, Catherine ULg et al

Conference (2015, October 29)

This presentation documents the attempt of the University of Liège (Belgium) to establish a "pedagogical development continuum" by offering three nested programs, each likely to be credited in the next ... [more ▼]

This presentation documents the attempt of the University of Liège (Belgium) to establish a "pedagogical development continuum" by offering three nested programs, each likely to be credited in the next one, thanks to a single overarching competency framework (the CREER model). At a proper level of intensity, each program builds upon components of SoTL, defined after Potter & Kustra (2011) as: "the systematic study of teaching and learning, using established or validated criteria of scholarship, to understand how teaching (beliefs, behaviours, attitudes, and values) can maximize learning, and/or develop a more accurate understanding of learning, resulting in products that are publicly shared for critique and use by an appropriate community". [less ▲]

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See detailL'infusion chronique et centrale d'ocytocine améliore la résistance à l'insuline induite par une nourriture riche en lipides chez le rat
Deblon, Nicolas; Veyrat-Durebex, Christelle; Legros, Jean-Jacques ULg et al

Conference (2011, March 23)

Detailed reference viewed: 34 (1 ULg)