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See detailImpact of vibroseismic underwater sound on the behaviour of baleen whales
Tougaard, Jakob; Luke, Klaus; Siebert, Ursula et al

Poster (2017)

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See detailThe impact of visual complexity on visual short-term memory in children with specific language impairment
Leclercq, Anne-Lise ULiege; Maillart, Christelle ULiege; Pauquay, Sarah et al

in Journal of the International Neuropsychological Society (2012), 18

Many studies have assessed visual short-term memory (VSTM) abilities in children with specific language impairment (SLI), with contrasting results: some studies observed preserved VSTM capacities while ... [more ▼]

Many studies have assessed visual short-term memory (VSTM) abilities in children with specific language impairment (SLI), with contrasting results: some studies observed preserved VSTM capacities while others reported impaired VSTM. The present study explores the hypothesis that the complexity of the visual information to be encoded and stored might underlie these discrepancies. Four VSTM conditions were administered to a group of 15 children with SLI, as well as to two groups of typically developing children, matched for chronological age and for VSTM capacity for visually simple stimuli, respectively. The stimuli to be remembered varied in their visual similarity and in the number of their visual features. Across the four VSTM conditions, children with SLI showed significantly reduced performance relative to an age-matched control group, and they were more strongly affected by visual similarity and number of features when compared to a control group matched for VSTM capacity for visually simple stimuli. The present results support the hypothesis that stimulus complexity is a determining factor of the poor VSTM performances in children with SLI. [less ▲]

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See detailImpact of visual modality on acoustic assessment of rooms
Defays, Aurore ULiege; Safin, Stéphane ULiege; Billon, Alexis ULiege et al

Poster (2011, May 27)

In the context of the conception of a multimodal immersive environment aimed to support the task of assessing the acoustical quality of rooms based on numerical simulations, we study the relationship ... [more ▼]

In the context of the conception of a multimodal immersive environment aimed to support the task of assessing the acoustical quality of rooms based on numerical simulations, we study the relationship between image and sound. Auralias project aims to develop an immersive environment for a collaborative work between architects and acousticians combining 3D sound rendering and 3D view of the room model. In this study, we analyzed the impact of a room picture on the acoustic assessment. We chose reverberation as acoustic parameter. First, we confronted 70 subjects with a sound clip and asked them to assess the reverberation degree (control condition). Then, we divided the subjects into three groups and repeated the same judgment task. However, in the first group, subjects listening the sound clip were confronted with a room picture consistent with the sound. In the second group, they were confronted with a « distractor » room picture (no link with the sound). In the last group, they listened the sound clip without any room picture. Our results showed a positive impact of consistent pictures on reverberation assessment but we found no effect of distractor pictures. [less ▲]

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See detailThe impact of visual perceptual learning on sleep and local slow wave initiation
Mascetti, Laura ULiege; Muto, Vincenzo ULiege; Matarazzo, Luca et al

in Journal of Neuroscience (2013)

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See detailImpact of vocal load during a prolonged reading task with specific emphasis on the output level
Remacle, Angélique ULiege; Roche, Anne ULiege; Finck, Camille ULiege et al

Conference (2010, October 18)

La charge vocale se définit comme la quantité d'utilisation vocale en termes de durée et d'intensité vocale. Dans cette étude, nous tentons d'étudier la charge vocale selon ces deux aspects. Pour ce faire ... [more ▼]

La charge vocale se définit comme la quantité d'utilisation vocale en termes de durée et d'intensité vocale. Dans cette étude, nous tentons d'étudier la charge vocale selon ces deux aspects. Pour ce faire, nous avons proposé une tâche de lecture à 50 femmes non fumeuses, âgées de 22 à 47 ans, chez qui l'examen phoniatrique a exclu la présence de toute pathologie vocale. L'impact de la durée de l'utilisation vocale a été étudié à l'aide de récoltes de mesures toutes les 30 minutes, au cours d'une lecture de deux heures. Nous avons réalisé des mesures objectives (Fréquence fondamentale, Jitter %, Shimmer %, Noise-to-Harmonic Ratio, étendue fréquentielle, dynamique d'intensité, temps maximum de phonation) ainsi qu'une auto évaluation sur une échelle visuelle analogique (qualité vocale, sensation d'effort, de fatigue et d'inconfort laryngé au cours de la lecture). Afin de mettre en évidence l'effet de l'intensité, chaque participante a réalisé deux fois la tâche de deux heures de lecture, à minimum trois jours d'intervalle afin de permettre la récupération entre les deux conditions de test. Une première fois à intensité conversationnelle (entre 60 et 65 dB), une seconde fois à intensité élevée (entre 70 et 75 dB). L'objectif était d'étudier les modifications liées à la durée et à l'intensité de l'utilisation vocale ainsi que l'impact de l'échauffement et de la fatigue vocale sur les paramètres étudiés. [less ▲]

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See detailImpact of vocal load on breathiness: Perceptual evaluation
Remacle, Angélique ULiege; Schoentgen, Jean; FINCK, Camille ULiege et al

in Logopedics, Phoniatrics, Vocology (2014), 39(3), 139-146

Objectives: To evaluate the impact on voice of 2 hours of continuous oral reading. Methods: Fifty normophonic women underwent two sessions of voice loading in which the required intensity level varied: 60 ... [more ▼]

Objectives: To evaluate the impact on voice of 2 hours of continuous oral reading. Methods: Fifty normophonic women underwent two sessions of voice loading in which the required intensity level varied: 60-65 dB(A) for the first session, and 70-75 dB(A) for the second session. Ten expert judges evaluated the breathiness of one sentence recorded before and after each loading session. Pairs of stimuli were presented randomly to the judges, who were asked to designate the breathiest sample. Results: A significant decrease in breathiness was observed following both sessions, suggesting an improvement of voice subsequent to loading. When comparing the two intensity levels, no difference was found for breathiness after vocal loading. [less ▲]

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See detailThe Impact of Vulnerability and Resilience to Environmental Changes on Mobility Patterns in West Africa
Zickgraf, Caroline ULiege; Vigil Diaz Telenti, Sara ULiege; de Longueville, Florence et al

E-print/Working paper (2016)

From the Sahel to the coast, West Africa is experiencing a variety of climate change impacts, including sea level rise, soil salinization, floods, drought, and desertification, while simultaneously ... [more ▼]

From the Sahel to the coast, West Africa is experiencing a variety of climate change impacts, including sea level rise, soil salinization, floods, drought, and desertification, while simultaneously suffering from other forms of environmental degradation. Together, these environmental changes are significantly influencing migration patterns in and out of West Africa. This paper seeks to analyze vulnerability and resilience to environmental changes as they affect and are affected by mobility patterns in the region. We assert that the impact of environmental changes cannot be isolated from other political, social, economic, and demographic pressures that together drive human mobility. In a region where natural resources form the foundation of livelihoods and food security (fishing and agriculture), the relationship between environmental changes and socioeconomic vulnerabilities is of particular concern. This paper therefore draws from four distinct case studies to grasp the variegated and cumulative vulnerability and resilience among local populations as they relate to internal and intraregional migration. [less ▲]

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See detailImpact of wheat bran supplementation to sows on their milk quality, their performances and their progeny’s
Leblois, Julie ULiege; Bindelle, Jérôme ULiege; Dehareng, Frédéric et al

Conference (2016, April 15)

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See detailImpact of winter feeding strategies on the growth of young dairy heifers in Wallonia
Picron, Pascale ULiege; Turlot, Amélie; Froidmont, Eric et al

Conference (2009)

Detailed reference viewed: 13 (1 ULiège)
See detailImpact of work on health
Hansez, Isabelle ULiege

in Vandenbrande, T; Vandekerckhove, S; Vendramin, P (Eds.) et al Quality of work and employment in Belgium (2012)

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See detailImpact of work variables and safety appraisal on well-being at work
Hansez, Isabelle ULiege; Taeymans, sophie; Nyssen, Anne-Sophie ULiege

in Pikaar, R. N.; Koningsveld, E. A. P.; Settels (Eds.) Proceedings of the 16th World Congress of Ergonomics (2006)

Work environments have been encountering tremendous changes since the early 1990s. The enlargement of flexibility practices has raised concerns about well-being at work but also about safety. These two ... [more ▼]

Work environments have been encountering tremendous changes since the early 1990s. The enlargement of flexibility practices has raised concerns about well-being at work but also about safety. These two research areas, i.e. safety and well-being at work, have a strong tradition of diagnosis and research but there are few examples in the literature that attempt to link the two areas. Our goal in this study was to analyze the impact of both work variables and safety appraisal on well-being within a context of organizational changes. We used questionnaires on 4297 workers from a large company in the energy sector that has encountered big organizational changes these last years. Job control dimensions, safety appraisal, eustress and distress were measured using existing questionnaires. The results give some evidence for an additive explanation of eustress when adding safety appraisal in the hierarchical regression analysis. The additive effect of safety appraisal on distress was also significant but not enough strong to be considered seriously. A path analysis has shown that the effect of management safety climate on distress was rather an indirect effect through the job control dimensions. [less ▲]

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See detailImpact of ηEarth on the Capabilities of Affordable Space Missions to Detect Biosignatures on Extrasolar Planets
Léger, Alain; Defrere, Denis ULiege; Malbet, Fabien et al

in Astrophysical Journal (2015), 808

We present an analytic model to estimate the capabilities of space missions dedicated to the search for biosignatures in the atmosphere of rocky planets located in the habitable zone of nearby stars ... [more ▼]

We present an analytic model to estimate the capabilities of space missions dedicated to the search for biosignatures in the atmosphere of rocky planets located in the habitable zone of nearby stars. Relations between performance and mission parameters, such as mirror diameter, distance to targets, and radius of planets, are obtained. Two types of instruments are considered: coronagraphs observing in the visible, and nulling interferometers in the thermal infrared. Missions considered are: single-pupil coronagraphs with a 2.4 m primary mirror, and formation-flying interferometers with 4 × 0.75 m collecting mirrors. The numbers of accessible planets are calculated as a function of η[SUB]Earth[/SUB]. When Kepler gives its final estimation for η[SUB]Earth[/SUB], the model will permit a precise assessment of the potential of each instrument. Based on current estimations, η[SUB]Earth[/SUB] = 10% around FGK stars and 50% around M stars, the coronagraph could study in spectroscopy only ∼1.5 relevant planets, and the interferometer ∼14.0. These numbers are obtained under the major hypothesis that the exozodiacal light around the target stars is low enough for each instrument. In both cases, a prior detection of planets is assumed and a target list established. For the long-term future, building both types of spectroscopic instruments, and using them on the same targets, will be the optimal solution because they provide complementary information. But as a first affordable space mission, the interferometer looks the more promising in terms of biosignature harvest. [less ▲]

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See detailImpact on athletic performance of an early return to play following an ACL rupture
Duval, Thomas; LEHANCE, Cédric ULiege; DANIEL, Christophe ULiege et al

in The Future of Football Medicine (2017, May)

Introduction and purpose: The rupture of the anterior cross ligament (ACL) is the most frequent knee injury incurred during participation in sports and especially in football. Typically, the injured ... [more ▼]

Introduction and purpose: The rupture of the anterior cross ligament (ACL) is the most frequent knee injury incurred during participation in sports and especially in football. Typically, the injured athlete must undergo a surgical reconstruction of the ligaments followed by a lengthy rehabilitation period. However, the timeline for return to competition after this operation remains a challenge. More than one third of the athletes are unable to go back to sport performing at the same level prior to the injury. Approximately 65% of patients who experience this injury are able to return to sport at the same level. The fear of undergoing a new accident remains a major hurdle with this sporting recovery and the persistence of functional deficits is the first cause of repetitive ligament injuries. A reathletization program guided by strength and conditioning coaches results in a greatly reduces the risk of recurring injury by approximately 66% Methods: Our study involved a randomized control test. Our sample included ten subjects, five in the experimental group and five in the control group. Beginning one month post-surgery, the first group participated in weekly reathletization session beginning one week post-operation, associated with rehabilitation in classical physiotherapy, over a period of six months. The second participated solely in standard physiotherapy. Both groups were subjected to an initial isokinetic test as a base measurement to track improvement. After six months, the subjects of the two groups were evaluated using the following tools: an isokinetic test, a questionnaire of KOOS and finally a Hop tests. Results: The analysis of the isokinetic test and the questionnaire of KOOS ( p= 0.30) enabled us to note differences between the two groups using quantified values; however, the results were significant. On the other hand, the analysis of the results obtained through the functional tests showed significant differences between the two groups, highlighting the increased performance and benefit for the group participating in weekly reathletization. The experimental group displayed results in the three jump tests which indicates a greater strength and recovery. For the single hop test and the triple hop, the result is p = 0.04, and for the cross over test, the result is p = 0.02. Conclusion: In our preliminary study, the quantified values for both groups indicated a greater improvement in the performances of the experimental group reathletization. Although during the statistical analysis and especially in the isokinetic test, few elements significantly evolved to see any for the questionnaire KOOS. The preliminary analysis warrants an experiment involving a larger subject pool be completed. A reathletisation program beginning one month after operation has been found to limit the nuisances and long period of inactivities (weight increase, losses of muscular force, decrease of aerobic performances) typically experienced by those who rupture the ACL. This program has been found to be especially effective when coupled with regular physiotherapy meetings. [less ▲]

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See detailImpact on laminated composite plates: comparison of test and simulation results obtained with LMS Samtech SAMCEF
Bruyneel, Michaël ULiege; Maurice, Verenne; Carrella, Delphine et al

in V ECCOMAS Thematic Conference on the Mechanical Response of Composites (2015)

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See detailImpact physiologique et pathologique du stress oxydant chez le cheval
De Moffarts, Brieuc; Kirschvink, Nathalie; Pincemail, Joël ULiege et al

in Annales de Médecine Vétérinaire (2005), 149(1), 1-9

Oxidative stress has become of increasing interest in research and in equine and human medicine. If the pro-oxidant burden overwhelms the endogenous antioxidant defence of the organism, the arising ... [more ▼]

Oxidative stress has become of increasing interest in research and in equine and human medicine. If the pro-oxidant burden overwhelms the endogenous antioxidant defence of the organism, the arising imbalance between pro- and antioxidants is defined as oxidative stress. Different pathways might increase the generation of reactive oxygen species ( ROS) and results in oxidative stress. In physiological conditions, like during moderated exercise, the balance between ROS production and antioxidants allows to maintain an optimal organic function. In the light of the potentially deleterious role of excessive ROS production and the evidence that exercise-induced oxidative stress occurs in horses, the assessment of the antioxidant status should be considered in sport horses. Recent researches indicate that oxidative stress may play a role in physiopathology of several pathological syndromes in horses. Therefore, with classical treatment, the controlled administration of antioxidants appears interesting for the modulation of these processes, as well as in sport horses during intense exercise period. [less ▲]

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See detailL’impact pratique de la régionalisation de l’impôt des personnes physiques
Bourgeois, Marc ULiege

Conference given outside the academic context (2015)

Detailed reference viewed: 14 (0 ULiège)