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See detailOn the periodontal ligament representation in orthodontic tooth movement modelisation
Mengoni, Marlène ULg; Ponthot, Jean-Philippe ULg

Conference (2011)

Orthodontic tooth movement (OTM) is the result of bone remodeling at the interface with the periodontal ligament (PDL) around a mechanically loaded tooth in response to a biomechanical stimulus. Modeling ... [more ▼]

Orthodontic tooth movement (OTM) is the result of bone remodeling at the interface with the periodontal ligament (PDL) around a mechanically loaded tooth in response to a biomechanical stimulus. Modeling of the PDL therefore plays an important role in the process of modeling OTM. However when producing a finite element model from clinical computer tomography data, the PDL cannot be segmented and its geometry is approximated by many authors from the root geometry. The aim of this study is to propose alternatives to a geometrical representation of the PDL using either simple spring elements between the teeth and alveolar bone or bilateral sticking contact conditions. Results consist in a comparison of the hydrostatic and Von-Mises stresses in the bone along the root as well as the strain energy used in a bone remodeling algorithm when a 1N force is applied to a single rooted tooth crown. While both models can well represent the pressure (hydrostatic stress) transfer from the tooth to the bone, the bilateral sticking contact conditions show better results to transfer the shear stress as well as the strain energy. [less ▲]

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See detailOn the periphery of Nollywood: Nigerian video filmmaking in Italy and the emergence of intercultural aesthetics
Jedlowski, Alessandro ULg

in Lombardi-Diop, Cristina (Ed.) Postcolonial Italy: Challenging National Homogeneity (2012)

Nigerian video films are widely consumed among Africans leaving in Italy, but their impact on the Italian society is not limited to their consumption. Two Nigerian video production companies, directly ... [more ▼]

Nigerian video films are widely consumed among Africans leaving in Italy, but their impact on the Italian society is not limited to their consumption. Two Nigerian video production companies, directly connected to the Nigerian system of production and distribution, have emerged in Northern Italy over the past few years, the IGB Film and Music Industry based in Brescia and the GVK (Giving Vividly with Kindness) based in Turin. These production companies shoot their films in Italy to sell them mainly within the Nigerian diaspora in Italy and on the Nigerian video market, metaphorically locating Italy on the periphery of the Nigerian production system. This article discusses the results of a research about these production companies through two main sections that focus on two different aspects of the phenomenon. The first section presents an analysis of the films produced by these companies, connecting it to the production strategies that they developed in order to be able to find a place within the Italian economic system. The two companies took very different marketing choices. On one hand, the IGB has oriented its production mainly toward a Nigerian audience, maintaining very specific aesthetic and narrative attributes, directly connected to Nollywood's cinematic style. On the other hand the GVK, after its first release in 2005, decided to change strategy, starting a partnership with an Italian director and trying to produce an intercultural product that could ideally work for both Nigerian and Italian audiences. Comparing these two strategies of production and the aesthetic choices that originated from them this article explores the process of construction of intercultural aesthetics in these videos. The second section presents an analysis of the contents of the video films produced by these companies, and analyzes the particular perspective on the experience of migration that they propose. These video films locate themselves at the point of convergence between the emergence of a migrant cinema in Italy and a specific phase of development of the Nigerian video film industry, characterized by a significant focus on the diaspora in terms both of production and marketing. As a consequence of it, the Nigerian videos produced in Italy, as other films recently produced in Italy by migrant directors, are able to represent the experience of migration from an internal perspective, but they do it by adopting the commercial film genres that characterize Nollywood films, in opposition to the more artistic and intellectually oriented style of other migrant films. The conjuncture of these two trends determines a very original representation of migration, which this article analyzes and interprets. [less ▲]

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See detailOn the perspectives of using XMM to study fundamental parameters of early-type stars
Rauw, Grégor ULg; van der Hucht, K. A.; Mewe, R. et al

in Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies (1999)

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See detailOn the Photometric Variations of HD 28843 and HD 29009
Manfroid, Jean ULg; Mathys, G.

in Information Bulletin on Variable Stars (1984), 2551

Not Available

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See detailOn the Piano Key Weir hydraulics
Machiels, Olivier ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Rutschmann, Peter; Grünzner, Markus; Stephan, Hötzl (Eds.) Proceedings of 2nd IAHR Europe Congress (2012)

The Piano Key Weir (PKW) is a kind of labyrinth weir with a geometry that uses overhangs to reduce the base length. The PKW can thus be directly placed on the crest of an existing dam. Together with its ... [more ▼]

The Piano Key Weir (PKW) is a kind of labyrinth weir with a geometry that uses overhangs to reduce the base length. The PKW can thus be directly placed on the crest of an existing dam. Together with its high discharge capacity for low heads (up to four times as high as an ogee-crested weir of same length), this geometric feature makes the PKW an interesting solution for dam rehabilitation and for new dam projects with a high level of constraints (design discharge, available space, reservoir storage, ...). PKW has been initially designed in 2001 and built for the first time in 2006 by “Electricité de France (EDF)”. Even if the first experimental studies confirmed its appealing discharge capacities, the flow upstream, over and downstream of this complex structure is still poorly described. Following a 3 years intensive experimental and numerical study of PKW hydraulics, the paper presents a general description of the hydraulic behavior of the PKW. It aims to explain the influence of the large set of geometric parameters on the discharge capacity. The assumptions of the study link various phenomenons depicted in the literature about PKW and an evaluation of their relative influence on the PKW efficiency is given. The role of the crests shape, the crests submersion, the nappes interactions, the crests approach conditions, the position of the control section and the head losses are analyzed. Design advices are also given. [less ▲]

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See detailOn the policy implications of changing longevity
Pestieau, Pierre ULg; Ponthiere, Grégory ULg

in CESifo Ecoonmic Studies (2014), 60

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See detailOn the possibility of self-enrichement in globular clusters
Parmentier, Geneviève ULg; Jehin, Emmanuel ULg; Magain, Pierre ULg et al

in Noels-Grötsch, Arlette; Magain, Pierre; Caro, Denise (Eds.) et al Liege International Astrophysical Colloquia (2000)

Not Available

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See detailOn the Potential Effect of Increased Dietary Intake of Fruits and Vegetables on Biomarkers of Lipid Peroxidation in Type 2 Diabetes Patients
PINCEMAIL, Joël ULg; PAQUOT, Nicolas ULg; Cillard, J et al

in Journal of Pharmacy & Nutrition Sciences (2013), 3(3),

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See detailOn the potential increase of the oxidative stress status in patients with abdominal aortic aneurysm.
PINCEMAIL, Joël ULg; Defraigne, Jean-Olivier ULg; Cheramy-Bien, J. P. et al

in Redox Report : Communications in Free Radical Research (2012), 17(4), 139-44

BACKGROUND: Abdominal aortic aneurysm (AAA) is a major cause of preventable deaths in older patients. Oxidative stress has been suggested to play a key role in the pathogenesis of AAA. However, only few ... [more ▼]

BACKGROUND: Abdominal aortic aneurysm (AAA) is a major cause of preventable deaths in older patients. Oxidative stress has been suggested to play a key role in the pathogenesis of AAA. However, only few studies have been conducted to evaluate the blood oxidative stress status of AAA patients. METHODS AND RESULTS: Twenty seven AAA patients (mean age of 70 years) divided into two groups according to AAA size (</= 50 or > 50 mm) were compared with an age-matched group of 18 healthy subjects. Antioxidants (vitamins C and E, beta-carotene, glutathione, thiols, and ubiquinone), trace elements (selenium, copper, zinc, and copper/zinc ratio) and markers of oxidative damage to lipids (lipid peroxides, antibodies against oxidized patients, and isoprostanes) were measured in each subject. The comparison of the three groups by ordinal logistic regression showed a significant decrease of the plasma levels of vitamin C (P = 0.011), alpha-tocopherol (P = 0.016) but not when corrected for cholesterol values, beta-carotene (P = 0.0096), ubiquinone (P = 0.014), zinc (P = 0.0035), and of selenium (P = 0.0038), as AAA size increased. By contrast, specific markers of lipid peroxidation such as the Cu/Zn ratio (P = 0.046) and to a lesser extent isoprostanes (P = 0.052) increased. CONCLUSION: The present study emphasizes the potential role of the oxidative stress in AAA disease and suggests that an antioxidant therapy could be of interest to delay AAA progression. [less ▲]

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See detailOn the potential of extrasolar planet transit surveys
Gillon, Michaël ULg; Courbin, F.; Magain, Pierre ULg et al

in Astronomy and Astrophysics (2005), 442

We analyse the respective benefits and drawbacks of ground-based and space-based transit surveys for extrasolar planets. Based on simple but realistic assumptions about the fraction of lower main sequence ... [more ▼]

We analyse the respective benefits and drawbacks of ground-based and space-based transit surveys for extrasolar planets. Based on simple but realistic assumptions about the fraction of lower main sequence stars harboring telluric and giant planets within the outer limit of the habitable zone, we predict the harvests of fictitious surveys with three existing wide field optical and near-IR cameras: the CFHT-Megacam, SUBARU-Suprime and VISTA-IR. An additional promising instrument is considered, VISTA-Vis, currently under development. The results are compared with the harvests predicted under exactly the same assumptions, for the space missions COROT and KEPLER. We show that ground-based wide field surveys may discover more giant planets than space missions. However, space surveys seem to constitute the best strategy to search for telluric planets. In this respect, the KEPLER mission appears 50 times more efficient than any of the ground-based surveys considered here. KEPLER might even discover telluric planets in the habitable zone of their host star. [less ▲]

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See detailOn the Potential of Recommendation Technologies for Efficient Content Delivery Networks
Kaafar, Mohamed Ali; Berkovsky, Shlomo; Donnet, Benoît ULg

in Computer Communication Review (2013), 43(3), 74-77

During the last decade, we have witnessed a substantial change in content delivery networks (CDNs) and user access paradigms. If previously, users consumed content from a central server through their ... [more ▼]

During the last decade, we have witnessed a substantial change in content delivery networks (CDNs) and user access paradigms. If previously, users consumed content from a central server through their personal computers, nowadays they can reach a wide variety of repositories from virtually everywhere using mobile devices. This results in a considerable time-, location-, and event-based volatility of content popularity. In such a context, it is imperative for CDNs to put in place adaptive content management strategies, thus, improving the quality of services provided to users and decreasing the costs. In this paper, we introduce predictive content distribution strategies inspired by methods developed in the Recommender Systems area. Specifically, we outline different content placement strategies based on the observed user consumption patterns, and advocate their applicability in the state of the art CDNs. [less ▲]

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See detailOn the Pragmatics of Subjectification: Emergence and Modalization of an Allative Future in Ancient Egyptian
Grossman, Eitan; Polis, Stéphane ULg

Conference (2010, November 11)

In this talk, we argue for a pragmatic basis for semantic change of the type observed in grammaticalization, viz., the conventionalization of conversational inferences (see, e.g., Bybee et al. 1994 ... [more ▼]

In this talk, we argue for a pragmatic basis for semantic change of the type observed in grammaticalization, viz., the conventionalization of conversational inferences (see, e.g., Bybee et al. 1994, Traugott & Dasher 2002, Ariel 2008) or more generally, the diachronic transfer of meaning from context to code (Givón 2005). Specifically, we claim that addressees (listeners/readers as active discourse participants) make inferences and in turn, as speakers/writers, propagate them, leading to their generalization. A crucial distinction must be made between SUBJECT-ORIENTED and SPEAKER-ORIENTED inferences, implicitly argued for in Bybee et al. (1994) and clearly downplayed in contemporary discussions such as Traugott & Dasher (2002). In SUBJECT-ORIENTED inferences, addressees interpret the utterance as a speaker’s report about the subject’s state of mind, while in the SPEAKER-ORIENTED ones, addressees interpret the utterance as reporting on the state of mind of the speaker. Speaker-oriented inferences are those that lead to the relaxing of selectional restrictions on subjects observed in a number of grammaticalization paths (illustration with allative future in the talk). Speaker-oriented inferences also lead to a rise in context-expansion and text frequency of constructions, which in turn catalyze many of the phenomena associated with grammaticalization. [less ▲]

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See detailOn the pragmatics of subjectification: The grammaticalization of verbless allative futures (with a case study in Ancient Egyptian)
Grossman, Eitan; Polis, Stéphane ULg

in Acta Linguistica Hafniensia : International Journal of Linguistics (2014), 46(1), 25-63

In this paper, we argue that an expanded conception of the distinction between speaker-oriented and subject-oriented inferences is crucial for understanding the motivations and mechanisms of semantic ... [more ▼]

In this paper, we argue that an expanded conception of the distinction between speaker-oriented and subject-oriented inferences is crucial for understanding the motivations and mechanisms of semantic change in grammaticalization and subjectification, on the one hand, and for clarifying the links between semantic change and reductive formal changes, on the other. Speaker-oriented inferences have significant consequences, leading to the relaxation of selectional restrictions on a construction. In turn, the relaxation of selectional restrictions can create conditions in which the type and token frequency of a construction can rise considerably. Furthermore, changes in the selectional restrictions on a construction can themselves catalyze semantic change by coercing listeners into new form–function pairings. This framework is applied to allative futures, a typological comparative concept developed in order to compare structurally diverse future tenses. Following the typological discussion, a diachronic case study of the emergence and grammaticalization of a verbless allative future in Ancient Egyptian is presented. Such verbless allative futures provide evidence against assumptions that purpose constructions as such are not grammaticalized as future tense constructions (Schmidtke-Bode 2009). Rather, they corroborate earlier hypotheses that it is the allative component of source constructions that crucially leads to intention meanings, and from intention to prediction (see, e.g., Bybee, Pagliuca, and Perkins 1994). [less ▲]

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See detailOn the presence of a day-of-the-week effect in the foreign exchange market
Corhay, Albert ULg; Fatemi, Ali M; Tourani-Rad, Alireza

in Managerial Finance (1995), 21(8), 32-43

The purpose of this paper is to study the presence of the day-of-the-week effect in the foreign exchange market using an extensive data set of six exchange rates and employing two alternative types of ... [more ▼]

The purpose of this paper is to study the presence of the day-of-the-week effect in the foreign exchange market using an extensive data set of six exchange rates and employing two alternative types of distributional assumptions and also distribution-free tests. Our findings support the hypotheses of higher Wednesday returns prior to October 1, 1981, for the British pound, the Canadian dollar, the Deutsch mark, the French franc, the Swiss franc and the Japanese yen. Pursuant to the change in the settlement procedures which took effect October 1, 1981, the differential Wednesday returns disappear. [less ▲]

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See detailOn the privacy of file sharing services
Nikiforakis, Nick; Gadaleta, Francesco ULg; Younan, Yves et al

Report (2010)

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See detailOn the Production and Kinematics of Sodium Atoms in the Head of Comet Hale-Bopp
Rauer, H.; Arpigny, Claude ULg; Hutsemekers, Damien ULg et al

in Bulletin of the American Astronomical Society (1997, July 01), 29

The interpretation of the presence and extent of the atomic sodium observed in comet Hale-Bopp raises a number of questions related to the production, motion, and lifetime of these Na atoms under the ... [more ▼]

The interpretation of the presence and extent of the atomic sodium observed in comet Hale-Bopp raises a number of questions related to the production, motion, and lifetime of these Na atoms under the action of the solar radiation near 1 AU. Here we report on data which pertain to the study of sodium in the head of the comet, yielding information on the Na emission in the coma out to ~ 0.15 x 10(6) km on the sunward side, to ~ 0.2 x 10(6) km tailwards. The observations were carried out at the Observatoire de Haute-Provence, with the 1.93 m telescope and the ELODIE spectrometer, which is fed by a pair of optical fibers with 2-arcsec apertures separated by 1.8 arcmin. In particular, spectra were obtained on 15-17 April, 1997, near the discovery date of the sodium tail at the La Palma Observatory. These spectra (resolution ~ 7 km/s) were used to determine Na D line profiles, as well as the relative intensities of the emissions corresponding to the two positions observed simultaneously. The main outcome of our first analysis concerns the profiles recorded some distance away from the optical centre, which all show velocity shifts and asymmetric line broadening in the direction of anti-sunward velocities. Some evidence is found to suggest the existence of an extended or multi-source production of sodium atoms, at least in the coma. Another series of spectra secured just before perihelion, 25-27 March, was analysed in the same way as the April spectra. Comparison between the two sets of data provides a nice illustration of the marked influence of the heliocentric radial velocity, not only upon the strength of the fluorescence ("Swings effect"), but also upon the motion of the emitting atoms, which are accelerated by the radiation pressure to widely different degrees as their excitation wavelengths fall at different places within the Fraunhofer Na D line profiles. [less ▲]

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See detailOn the projective geometry of the supercircle: a unified construction of the super cross-ratio and Schwarzian derivative
Michel, Jean-Philippe ULg; Duval, Christian

in International Mathematics Research Notices (2008), 2008

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See detailOn the properties of the hotelling’s T2 control chart with variable sampling intervals
Faraz, Alireza ULg; Chalaki, Kamyar; Moghadam, M. B.

in Quality & Quantity (2011), 45(3), 579-586

When T 2 control chart is used to monitor a process, it is usually assumed that the samples of size n0 is taken at constant intervals t0 . In this paper, we investigate the T 2 control chart for ... [more ▼]

When T 2 control chart is used to monitor a process, it is usually assumed that the samples of size n0 is taken at constant intervals t0 . In this paper, we investigate the T 2 control chart for monitoring the process mean vector when the sampling intervals are variable. Recent studies have shown that the variable sampling interval (VSI) scheme helps practitioners detect process shifts more quickly than the classical scheme Fixed Ratio Sampling (FRS). In this paper, it is assumed that the length of time the process remains in control is exponentially distributed. [less ▲]

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See detailOn the Protoporphyrin Monolayers Conformation
Humbert, Christophe; Dreesen, Laurent ULg; Sartenaer, Yannick et al

in Chemphyschem : A European Journal of Chemical Physics and Physical Chemistry (2006), 7

Detailed reference viewed: 14 (4 ULg)