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See detailAccounting for Price Endogeneity in Airline Itinerary Choice Models: An Application to Continental U.S. Markets
Lurkin, Virginie ULg; Garrow, Laurie; Higgins, Matthew et al

in Transportation Research. Part A : Policy & Practice (in press)

Network planning models, which forecast the profitability of airline schedules, support many critical decisions, including equipment purchase decisions. Network planning models include an itinerary choice ... [more ▼]

Network planning models, which forecast the profitability of airline schedules, support many critical decisions, including equipment purchase decisions. Network planning models include an itinerary choice model which is used to allocate air total demand in a city pair to different itineraries. Multinomial logit (MNL) models are commonly used in practice and capture how individuals make trade-offs among different itinerary attributes; however, none that we are aware of account for price endogeneity. This study formulates an itinerary choice model that is consistent with those used by industry and corrects for price endogeneity using a control function that uses several types of instrumental variables. We estimate our models using database of more than 3 million tickets provided by the Airlines Reporting Corporation. Results based on Continental U.S. markets for May 2013 departures show that models that fail to account for price endogeneity overestimate customers’ value of time and result in biased price estimates and incorrect pricing recommendations. The size and comprehensiveness of our database allows us to estimate highly refined departure time of day preference curves that account for distance, direction of travel, the number of time zones traversed, departure day of week and itinerary type (outbound, inbound or one-way). These time of day preference curves can be used by airlines, researchers, and government organizations in the evaluation of different policies such as congestion pricing. [less ▲]

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See detailEffects of an experimental resource pulse on the macrofaunal assemblage inhabiting seagrass macrophytodetritus
Remy, François ULg; Gobert, Sylvie ULg; Lepoint, Gilles ULg

in Belgian Journal of Zoology (in press)

Physical disturbances and resource pulses are major structuring drivers of terrestrial and aquatic ecosystems. The accumulations of exported dead leaves from the Neptune grass, Posidonia oceanica (L ... [more ▼]

Physical disturbances and resource pulses are major structuring drivers of terrestrial and aquatic ecosystems. The accumulations of exported dead leaves from the Neptune grass, Posidonia oceanica (L.) Delile are ephemeral and highly dynamic detrital habitats offering food sources and shelter for vagile macrofauna community. These habitats are frequently subject to wind and storms which can add “new” detrital material to previous accumulations; these can be defined as resource pulses and could potentially impact the associated macrofauna. This study assesses the impact of an experimental resource pulse on the macrofauna associated with exported P. oceanica litter accumulations. The experimental design consisted of two pulse treatments (the addition of dead leaves with and without the associated fauna), and two controls (one procedural, and one total control), where the added material was left underwater for 14 days. Invertebrates then present in the sampled detritus were all identified and counted. Our data suggest that the responses of these invertebrates to resource pulses present intermediate characteristics between aquatic and terrestrial ecosystems responses. Inputting a moderate amount of dead P. oceanica leaves into experimental mesocosms had a non-negligible impact and rapidly affected the macrofauna community. Specialist detritivores species were boosted while herbivore/detritivore species dramatically decreased. Predators also showed a modest but significant density increase, demonstrating the fast propagation of the pulse response throughout the entire community and through several trophic levels. Strict hypoxia-tolerant species were also only observed in the treated mesocosms, indicating the strong influence of resource pulses on physico-chemical conditions occurring inside litter accumulations. [less ▲]

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See detailMental Powers in Early Modern Philosophy. British Journal for the History of Philosophy. Special Issue
Boccaccini, Federico ULg; Marmodoro, Anna

Book published by Routledge (in press)

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See detailBlattmasken. Un motif iconographique mêlant frontalité et dynamisme végétal
Derwael, Stéphanie ULg

in Actes du colloque « Images Fixes/Images en mouvement » (in press)

Fixité et mouvement coexistent fréquemment dans l’imagerie antique. Les Blattmasken en sont la parfaite illustration, car ils se caractérisent à la fois par une frontalité presque exemplaire et par un ... [more ▼]

Fixité et mouvement coexistent fréquemment dans l’imagerie antique. Les Blattmasken en sont la parfaite illustration, car ils se caractérisent à la fois par une frontalité presque exemplaire et par un dynamisme végétal insufflé par les feuilles dont ils sont composés. Les quatre exemples choisis pour illustrer ce propos correspondent chacun à une formule particulière d’intégration des têtes végétalisées dans leur environnement immédiat. Celles-ci peuvent en effet être isolées de tout contexte végétal, intégrées dans un décor de rinceaux, ou encore structurellement liées à celui-ci en lui donnant naissance ou en émergeant de l’une de ses volutes. Cette forme de végétalisation de la figure humaine semble se rattacher à une hybridation plutôt qu’à une métamorphose. Cette fusion des règnes humain et végétal révèle une symbolique complexe qu’il conviendra de préciser. [less ▲]

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See detailDes Blattmasken dans la Rome carolingienne. Entre remploi et imitation
Derwael, Stéphanie ULg

in Actes du IXe Congrès de l’Association des Cercles francophones d’Histoire et d’Archéologie de Belgique (in press)

La Blattmaske ou tête végétalisée est un motif romain apparu au Ier siècle apr. J.-C. Elle ne cessa d’être utilisée dans l’univers des formes , et donc de se renouveler. Mais il est un milieu qui ... [more ▼]

La Blattmaske ou tête végétalisée est un motif romain apparu au Ier siècle apr. J.-C. Elle ne cessa d’être utilisée dans l’univers des formes , et donc de se renouveler. Mais il est un milieu qui constitue un jalon important dans l’histoire de son utilisation : la Rome de l’époque carolingienne. Après une rupture de près de quatre siècles dans la mise en oeuvre italique du motif, le remploi de fragments du temple de Sol Invictus semble en effet être à l’origine d’un certain regain d’intérêt pour le sujet dans des églises romaines du IXe siècle. Bien qu’il ne soit pas toujours aisé de distinguer des originaux antiques spoliés, parfois retravaillés, de créations médiévales, l’examen des fragments et de leur contexte permet de préciser leur origine et leur signification. [less ▲]

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See detailIl Bibbiena ‘moccicone’: l’autoironia e il classicismo come ingredienti del perfetto segretario e cortigiano
Marconato, Claudia ULg

in Être homme de « lettres » : secrétaires et politique culturelle au seizième siècle (in press)

Bernardo Dovizi, one of the most famous secretaries of the early Italian Reinassance, is best known for his literary works and for being the patron of Raffaello rather than for his endeavors in diplomacy ... [more ▼]

Bernardo Dovizi, one of the most famous secretaries of the early Italian Reinassance, is best known for his literary works and for being the patron of Raffaello rather than for his endeavors in diplomacy. By deciding to follow the interests of Giovanni de’ Medici, Dovizi made some poor political decisions in his career but, in spite of this, he cunningly managed to get his patron become the Pope. The "Calandra" is a work that depicts well the author’s ideas, in between parody and classicism. From his works, Epistolario and Ricordi, it appears that the main strength of Dovizi is his irony, through which he manages to become almost an accomplice with his patron. Alongside with the iconological choice of the frescoes of his Stufetta and Loggia in the Vatican, he assumes the posture of the secretary-jester, as it was portrayed by Baldassarre Castiglione in "The Book of the Courtier": the satyr that washes into the room, used as bathroom, corresponds to the most famous pose of the patron who insists on these burlesque and mocking characteristics, although relating to Ovid and Plato. Bibbiena seems to be aware of how much the man that exceeds in praise himself appears unbearable, therefore, in his relations with members of the ruling class, he often assumes a playful attitude. In the Rome of Leo X, because of the Socratic 'serio ludere', such attitude was accepted and admired. The best instruments of Bibbiena are the pleasantness and a careful selection of humanistic ideals. Such ideals were those that suited better the environment in which he, the courtier, had to operate, and were used in his works. [less ▲]

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See detailLes Blattmasken dans la mosaïque pariétale. Nymphées et bassins domestiques
Derwael, Stéphanie ULg

in Actes du XIIe colloque de l’Association Internationale pour l’Etude de la Mosaïque Antique (AIEMA) (in press)

Blattmasken belong to vegetalized human figures used in parietal decoration of nymphaei and domestic ponds. Their use depends on the process of iconographic forms’ transmission already highlighted between ... [more ▼]

Blattmasken belong to vegetalized human figures used in parietal decoration of nymphaei and domestic ponds. Their use depends on the process of iconographic forms’ transmission already highlighted between the parietal mosaic, the italic mural painting of Ist century a.C. and the African ground mosaic. This transfer is discussed in the light of two cases : the House of Neptune and Amphitrite at Herculanum and the House of the Nymphs at Neapolis. The study is based on their iconographical environments and on their typology. It highlights two different symbolic conceptions of the motive. [less ▲]

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See detailRéflexions sur la datation du cycle des « Femmes vertueuses ». De l’utilisation des sources antiques par les peintres antiquisants des Temps Modernes
Laboury, Dimitri ULg; Huby, Caroline

in Allart, Dominique; Bert, Mathilde; Gilles, Isabelle (Eds.) Liège au XVIe siècle. Art et culture autour de L.Lombard (in press)

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See detailLe système belge des brevets au 19e s. : un paradis pour les transferts de technologie internationaux ?
Peters, Arnaud ULg; de Favereau, Corentin

in Actes du Colloque d'hommage au Professeur Michel Dorban (in press)

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See detailLa récitation de l’alphabet avestique dans les rituels : innovation ou archaïsme ?
Ferrer-Losilla, Joan Josep ULg

in Swennen, Philippe; Ferrer-Losilla, Joan Josep; Redard, Céline (Eds.) et al Aux sources des liturgies indo-iraniennes (in press)

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See detailLe bassin industriel de Liège dans l'entre-deux-guerres : reconstruction industrielle et transition énergétique ?
Peters, Arnaud ULg; Defechereux, Olivier ULg

in Actes du Colloque "La transition énergétique : un concept historique ?" (Belfort, 23-24 octobre 2014) (in press)

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See detailEccentric training for tendon healing after lesion: a rat model
Kaux, Jean-François ULg; Libertiaux, Vincent ULg; Leprince, Pierre ULg et al

in American Journal of Sports Medicine (in press)

BACKGROUND:The tendon is a dynamic entity that remodels permanently. Platelet-rich plasma (PRP) injection has been shown to have a beneficial effect on tendon healing after lesion in rats. Furthermore ... [more ▼]

BACKGROUND:The tendon is a dynamic entity that remodels permanently. Platelet-rich plasma (PRP) injection has been shown to have a beneficial effect on tendon healing after lesion in rats. Furthermore, eccentric exercise seems to improve the mechanical quality of the tendon. HYPOTHESIS:A combination of PRP injection and eccentric training might be more effective than either treatment alone. STUDY DESIGN:Controlled laboratory study. METHODS:Adult male rats were anesthetized, an incision was performed in the middle of their left patellar tendon and an injection of physiological fluid (PF) or homologous PRP was randomly made at the lesion level. The rats were then divided into 2 groups: the eccentric group, undergoing eccentric training 3 times a week, and the untrained group, without any training. Thus, 4 groups were compared. After 5 weeks, the tendons were removed and their ultimate tensile strength and energy were measured. Tendons were frozen for proteomic analyses when all biomechanical tests were completed. Statistical analysis was performed with linear mixed effect models. RESULTS:No significant difference was found between the treatments using PF injection or PRP injection alone. However, the value of the ultimate tensile force at rupture was increased by 4.5 N (108% of control, P = .006) when eccentric training was performed. An intragroup analysis revealed that eccentric training significantly improved the ultimate force values for the PRP group. Proteomic analysis revealed that eccentric training led to an increase in abundance of several cytoskeletal proteins in the PF group, while a decrease in abundance of enzymes of the glycolytic pathway occurred in the PRP treated groups, indicating that this treatment might redirect the exercise-driven metabolic plasticity of the tendon. CONCLUSION: Eccentric training altered the metabolic plasticity of tendon and led to an improvement of injured tendon resistance regardless of the treatment injected (PF or PRP). CLINICAL RELEVANCE:This study demonstrates the necessity of eccentric rehabilitation and training in cases of tendon lesion regardless of the treatment carried out. [less ▲]

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See detailPerinatal programming of depressive-like behavior by inflammation in adult offspring mice whose mothers were fed polluted eels: Gender selective effects
Soualed, Nidhal; Dridi, Imen; Eppe, Gauthier ULg et al

in Brain, Behavior & Immunity (in press)

Several lines of evidence indicate that early-life inflammation may predispose to mental illness, including depression, in later-life. We investigated the impact of perinatal exposure to polluted eels on ... [more ▼]

Several lines of evidence indicate that early-life inflammation may predispose to mental illness, including depression, in later-life. We investigated the impact of perinatal exposure to polluted eels on neonatal, postnatal, and adult brain inflammation, and on the resignation behavior of male and female adult offspring mice. The effects of maternal standard diet (laboratory food) were compared to the same diet enriched with low, intermediate, or highly polluted eels. Brain inflammatory markers including cytokines were assessed in offspring mice on the day of birth (i.e., on the postnatal day–PND 1), upon weaning (PND 21) and at adulthood (PND 100). Plasma myeloperoxidase and corticosterone levels were evaluated at PND 100. Immobility behavior of offspring was assessed in adulthood (i.e., at PNDs 95–100), using the tail suspension and forced swimming tests. Chronic brain inflammation was found in male and female offspring mice compared to controls, as assessed at PNDs 1, 21, and 100. The level of myeloperoxidase was found to be significantly higher in both adult males and females vs. control offspring. However, high corticosterone levels were only found in male offspring mice that were perinatally exposed to eels, suggesting a gender-selective dysregulation of the adult hypothalamicpituitaryadrenal (HPA) axis. Gender-specific differences were also detected in adulthood in regard to offspring resignation behavior. Thus, compared to controls, males, but not females, whose mothers were fed eels during pregnancy and lactation exhibited a depressive-like behavior in adult age in both behavioral models of depression. Depressive symptoms were more pronounced in male mice perinatally exposed to either intermediate or highly polluted eels than those exposed to only lowly polluted eels. Our results indicate that early-life inflammatory insult is a plausible causative factor that induce the depressive phenotype exhibited by male adult offspring mice, most likely through a gender-specific HPA axis enhanced activation. [less ▲]

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See detailSelf in Dementia
Antoine, Nicolas ULg; Genon, Sarah ULg; Bastin, Christine ULg et al

in Mishara; Corlett, P.; Fletcher, P. (Eds.) et al Phenomenological Neuropsychiatry, How Patient Experience Bridges Clinic with Clinical Neuroscience (in press)

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See detailA component method for cold-formed steel beam-to-column bolted gusset plate joints
Bucmys, Zilvinas; Daniunas, Alfonsas; Jaspart, Jean-Pierre ULg et al

in Thin-Walled Structures (in press)

Cold-formed steel elements are being used more frequently on construction sites because of the good strength-to-cost ratio. However, insufficient studies are published examining the properties of these ... [more ▼]

Cold-formed steel elements are being used more frequently on construction sites because of the good strength-to-cost ratio. However, insufficient studies are published examining the properties of these constructions. This paper presents a study of cold formed steel bolted gusset plate connections. A “three springs” mechanical model to calculate joint stiffness is presented. Then the results predicted through the proposed model are validated through comparisons to experimental and finite element results. [less ▲]

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See detailThe Poetics of (In)visibility: A Stylistic Analysis of Caryl Phillips's Foreigners: Three English Lives
Tunca, Daria ULg

in Ariel : A Review of International English Literature (in press)

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See detailComment la participation à une recherche contribue au développement professionnel : le cas des exemples à l’Université
Fossion, Gilles ULg; Faulx, Daniel ULg

in Recherches Qualitatives (in press)

La recherche scientifique constitue un des piliers centraux de l’activité universitaire. Nous nous sommes donc questionnés sur les apprentissages générés par celle-ci. Après avoir brièvement décrit les ... [more ▼]

La recherche scientifique constitue un des piliers centraux de l’activité universitaire. Nous nous sommes donc questionnés sur les apprentissages générés par celle-ci. Après avoir brièvement décrit les objectifs et enjeux de cette communication, nous proposons une présentation des objectifs et de la méthodologie de la recherche que nous avons menée au sein des Facultés de Psychologie et des Sciences de l’Éducation de l’Université de Liège. Nous poursuivons, enfin, par la mise en évidence de ses principaux résultats. Ces résultats se situent sur deux niveaux. D’une part, nous présentons les résultats inhérents à la recherche - relative aux impacts générés par la mobilisation de l’exemple au sein du discours pédagogique - et qui contribue à l’enrichissement du champ scientifique abordé. D’autre part, nous abordons les résultats qui permettent la mise en évidence de l’aspect formatif que revêt la participation à une recherche scientifique pour les acteurs. [less ▲]

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