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See detailHolographic interferometry with a 90 degrees photorefractive crystal geometry
Georges, Marc ULg; Pauliat, G.; Weidner, E. et al

in Delaye, Ph; Denz, C.; Mager, L. (Eds.) Photorefractive Effects, Materials, and Devices (2003, June)

Holographic interferometers are generally designed in the common geometry where both interfering waves (reference and object) enter the crystal by the same window (co-propagating configuration). The ... [more ▼]

Holographic interferometers are generally designed in the common geometry where both interfering waves (reference and object) enter the crystal by the same window (co-propagating configuration). The alternative presented here consists in using a reference beam entering the crystal by a lateral face. The crystal has to be cut adequately in order to obtain electro-optic properties similar to that of the co-propagating configuration but with a smaller optical scattering noise. Therefore higher signal-to-noise ratios are expected in the interferograms. We will present the main features and constraints of this configuration together with the experimental study of its noise characteristics. This work has been performed for sillenite and semiconductor crystals [less ▲]

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See detailHolographic interferometry with photorefractive crystals : recent industrial applications
Thizy, Cédric ULg; Georges, Marc ULg; Hustinx, Guy-Michel et al

in Proceedings of the International Symposium to Commemorate the 60th Anniversary of the Invention of Holography (2008, October)

Photorefractive crystals allow in-situ dynamic holographic recording and indefinite reusability. Also they exhibit specific properties that other recording materials do not and which can be advantageously ... [more ▼]

Photorefractive crystals allow in-situ dynamic holographic recording and indefinite reusability. Also they exhibit specific properties that other recording materials do not and which can be advantageously used in holographic interferometry. For 15 years we have been developing holographic interferometry techniques and devices with Bi12SiO20 (BSO) crystals. The dynamic behaviour of the latter allows a high degree of userfriendliness of holographic interferometry (like techniques based on electronic recording), together with higher resolution interferograms (no speckle noise - no need of filtering). In the past we already have presented a wide range of applications in metrology, NDT and vibrations measurement. Here we present recent industrial applications obtained with a device which is now commercially available. It has proven successful applications in highly demanding applications where high resolution was required [less ▲]

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See detailHolographic interferometry with photorefractive crystals. Early experiments and results of the ongoing european project PHIFE
Georges, Marc ULg; Thizy, Cédric ULg; Lemaire, Philippe et al

in Dantec Ettemeyer 11th International User Meeting (2004, October)

Photorefractive crystals offer many advantages over other classical holographic recording media. They allow fast in-situ processable holographic recording as well as indefinite reusability. Moreover high ... [more ▼]

Photorefractive crystals offer many advantages over other classical holographic recording media. They allow fast in-situ processable holographic recording as well as indefinite reusability. Moreover high signal-to-noise ratio can be reached as well as high resolutions. We present several types of holographic instruments using such materials. Here we will emphasize their applications in vibration measurements. A first one is based on the classical stroboscopic technique, a second one uses a pulsed laser. We describe also the recent results obtained in the framework of the european project PHIFE (Pulsed Holographic Interferomete for the analysis of Fast Events), aiming at developing a full field measurement system of vibrations modes at high repetition rate. [less ▲]

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See detailHolographic optical elements
Stijns, Erik; Roose, Stéphane ULg

in Haris, D.; Shay, T. (Eds.) Proceedings of the international conference Lasers '89 (1989)

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See detailHolographic photorefractive images storage for applied metrology by interferometry
Lemaire, Philippe ULg; Georges, Marc ULg

in Lagarde, A. (Ed.) Advanced Optical Methods and Applications in Solid Mechanics (2000)

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See detailHolographic techniques at long wave infrared wavelengths
Vandenrijt, Jean-François ULg; Georges, Marc ULg

in Proceedings of the International Symposium to Commemorate the 60th Anniversary of the Invention of Holography (2008, October)

For industrial applications, holographic interferometry and electronic speckle pattern interferometry techniques using visible laser light are often too sensitive to external perturbations. Consequently ... [more ▼]

For industrial applications, holographic interferometry and electronic speckle pattern interferometry techniques using visible laser light are often too sensitive to external perturbations. Consequently they require too much stability, preventing their widespread use in field applications. One simple idea to overcome this problem is to increase the wavelength of the laser light. We considered the 10 µm wavelength range corresponding to well known CO2 laser and because imagers exist in this spectral range. One other important advantage is that the strain/displacement measurement range is larger than the equivalent techniques in visible light. We will present the preliminary experiences performed so far with components available in our lab. Mainly, we show in-plane electronic speckle pattern interferometry and for the first time digital holographic interferometry. We also discuss specific problems related to the wavelength increase. [less ▲]

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See detailHoly Motherhood: Gender, Dynasty and Visual Culture in the Later Middle Ages
L'Estrange, Elizabeth ULg

Book published by Manchester University Press (2008)

This book brings images of holy motherhood and childbearing into the centre of an art-historical enquiry. By focusing on images of St Anne and the Holy Kinship in Books of Hours made for aristocratic ... [more ▼]

This book brings images of holy motherhood and childbearing into the centre of an art-historical enquiry. By focusing on images of St Anne and the Holy Kinship in Books of Hours made for aristocratic women in relation to the dynastic importance of heirs, it reassesses the role of the female viewer as an active agent in the interpretation of pictures and popular devotional rites. Holy motherhood combines an innovative methodology that draws on art-historical and contemporary gender studies with empirical evidence from fifteenth-century manuscripts, to show how images worked not only to script and maintain gender and social roles within patriarchal society but also to offer viewers ways of managing those roles. Some of the manuscripts discussed are relatively unknown and their images and texts are made available to readers for the first time. The study begins by problematising the notion that intimate, post-partum images of holy childbirth found in Books of Hours provide a window onto the medieval past and women's viewing habits. Through an adaptation of Baxadall's 'period eye', the first part of the book explores how aristocratic lay women - and men - viewed and interpreted images of childbirth by considering their familiarity with prayers for childbirth, the lying-in ceremony and the rite of churching. The second part uses this methodology to interpret the images and prayers in six bespoke manuscripts, including the Fitzwilliam Hours, owned by several Angevin and Breton duchesses, and the Hours of Marguerite of Foix. The book will appeal to advanced students, academics and researchers of Art History, Illuminated Manuscripts, Medieval History and Gender Studies. [less ▲]

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See detailHombre de letras, escritor, autor: declinación social de una función simbólica
Durand, Pascal ULg

in Zapata, Juan (Ed.) La invención del autor. Nuevas aproximaciones al estudio sociológico y discursivo de la figura autorial (2014)

EL LIBRO El presente volumen pretende introducir en el ámbito hispanoamericano las nuevas aproximaciones teóricas y las diferentes apuestas metodológicas surgidas durante las dos últimas décadas para ... [more ▼]

EL LIBRO El presente volumen pretende introducir en el ámbito hispanoamericano las nuevas aproximaciones teóricas y las diferentes apuestas metodológicas surgidas durante las dos últimas décadas para abordar el estudio de la figura del autor y el problema de la autorialidad. Desde el desafío lanzado por Michel Foucault en su ensayo "¿Qué es un autor?", y que encabeza esta compilación, se han producido distintas respuestas y elaboraciones por parte de un grupo de investigadores que provienen de coordenadas geográficas tan diversas como Francia, Bélgica, Suiza, Canadá e Israel. Estos son los escritores que integran en su mayor parte esta compilación, con temas como la historia de la figura autorial, la imagen y la postura de autor, y el dilema y los mitos del autor moderno; además, el texto ofrece aplicaciones concretas, tanto desde una perspectiva europea (mediante el estudio de autores como Arthur Rimbaud, Gide, Pierre Michon y Jean Rouaud) como desde una colombiana (con análisis sobre José Asunción Silva, Jorge Gaitán Durán, Fernando Vallejo y Efraim Medina Reyes). La invención del autor permite conocer los desarrollos más actuales y destacados en la materia, y abre numerosos ejes de investigación en una temática especialmente importante y sensible en la actualidad, pero sobre la cual se ha publicado muy poco en nuestro medio; de ahí la importancia de esta antología para el debate académico. [less ▲]

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See detailHome Blood Pressure in Kidney Transplant Recipients (ktr)- Validity of different schedules of self-monitoring
Saint-Remy, Annie ULg; WEEKERS, Laurent ULg; BONVOISIN, Catherine ULg et al

Conference (2015, October 24)

HOME BLOOD PRESSURE IN KIDNEY TRANSPLANT RECIPIENTS (KTR)-Validity of different schedules of self-monitoring A. Saint-Remy, L. Weekers, C. Bonvoisin, P. Xhignesse, B.Dubois, JM. Krzesinski NEPHROLOGY ... [more ▼]

HOME BLOOD PRESSURE IN KIDNEY TRANSPLANT RECIPIENTS (KTR)-Validity of different schedules of self-monitoring A. Saint-Remy, L. Weekers, C. Bonvoisin, P. Xhignesse, B.Dubois, JM. Krzesinski NEPHROLOGY - CHU LIEGE AIM: Office blood pressure (OBP), 24-h ambulatory monitoring (ABPM) and home self- monitoring (HBP) allow assessing BP control in treated HT patients. For HBP, ESH guidelines recommend 7 days of measurements but that duration is questioned. The present study analyzed the agreement between daytime ABP and different schedules for HBP in 70 treated hypertensive KTR. METHOD: BP control defined by OBP <140/90 and daytime ABP or HBP <135/85 mmHg was tested in 70 KTR (mean age 56 ± 11 y; mean graft survival 7 ± 6.6 y). OBP and HBP were measured with an Omron M6 and 24-h ABPM with a Spacelabs 90207. HBP was measured on consecutive days (2 times in morning and 2 times at evening/day), the first day was discarded for the mean calculation. Agreement between daytime and HBP was studied when HBP was measured during 7, 5 or 3 days. RESULTS: BP was uncontrolled in 50% of the KTR based on OBP, in 61 % according to daytime ABP and even in 64 % with HBP. Sensitivity (Se) testing agreement between daytime ABP and HBP decreased progressively when number of days was shortened: the highest Se was observed for a 7 days duration with 1st day discarded (86 %). Specificity (Sp) fluctuated around 70 % and was the highest for a 5 (73 %) and 3 days schedule. However the 5 days schedule had higher Se (83 %) than the 3 days. Proportions of KTR correctly classified according to daytime ABP were 79 %, 79 % and 78 % with the 7, 5 or 3 days schedule, respectively. CONCLUSIONS: HBP, easier and less restricting method than 24h ABPM, is a good alternative to daytime ABPM as nearly 80 % of treated KTR were similarly classified. HBP recording period can be shortened to 5 days according to Se and Sp. A 3 days schedule seems more risky reducing the chance to identify masked HT due to a decreased drug adherence. [less ▲]

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See detailHome range size and daily path length in a wild troop of northern pigtailed macaques (Macaca leonina): preliminary results
Jose Dominguez, Juan Manuel; Albert, aurélie; Garcia, CJ et al

Conference (2012, March)

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See detailHome-to-work commuting, spatial structure and energy consumption: A comparative analysis of Wallonia and Flanders, Belgium
Dujardin, Sébastien ULg; Boussauw, Kobe; Brévers, Florence ULg et al

in Cornelis, Eric (Ed.) Proceedings of the BIVEC-GIBET Transport Research Day 2011 (2011)

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See detailHome-to-work commuting, urban form and potential energy savings: A local scale approach to regional statistics
Dujardin, Sébastien; Pirart, François; Brevers, Florence et al

in Transportation Research. Part A : Policy & Practice (2012), 46

The link between transport energy consumption and land use patterns has been the focus of a considerable amount of academic works over the past decades. While many empirical researches are backed up with ... [more ▼]

The link between transport energy consumption and land use patterns has been the focus of a considerable amount of academic works over the past decades. While many empirical researches are backed up with solid statistical techniques, most of them do not fully consider the influence of scale underlying empirical quantitative investigations. Using fine-scale home-to-work commuting data for Wallonia (Belgium), this paper re-evaluates Breheny’s (1995) assertion that urban structure should hold the characteristics of major cities if substantial energy savings are to be achieved. A local scale approach highlights efficient settlements in terms of transport energy consumption not only within major towns, butalso within remote rural areas. Furthermore, results suggest that influencing the urban form following local energy efficient examples rather than regional ones could also yield significant gains, without an extreme policy stance of re-urbanisation in major cities. [less ▲]

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See detailHomeland-oriented activities and integration in the host society
Perrin, Nathalie ULg; Martiniello, Marco ULg

in Féron, Elise; Orrnert, Anna (Eds.) The INFOCON Mousebook. Transnational Communities and Conflicts. Challenges and how to address them (2011)

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See detailHomenaje conmemorativo a Manuel Sacristán
Ceballos Viro, Alvaro ULg

in Revista de Hispanismo Filosófico (2006)

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See detailEl homenaje de 1930 a Juan Ruiz: sinécdoque y silepsis
Ceballos Viro, Alvaro ULg

in Toro Ceballos, Francisco; Godinas, Laurette (Eds.) Juan Ruiz, Arcipreste de Hita, y el "Libro de buen amor". Congreso homenaje a Jacques Joset (2011)

Detailed reference viewed: 1173 (12 ULg)