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See detailHow to expand method by and for sensory: trials along and beside fieldwork
Vangeebergen, Thomas ULg

Conference (2016, September 01)

In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical ... [more ▼]

In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical work, as graphic novel or comics. [less ▲]

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See detailComputed tomographic findings of a far lateral lumbar disc extrusion in a dog
Rizza, Maïlis ULg; Bouvy, Bernard ULg; Shimizu, Naomi ULg et al

Poster (2016, September 01)

Introduction In human medicine, far lateral lumbar disc extrusion (FLLDE) represents 7 to 12% of all disc herniations and MRI is the method of choice for diagnosis. MRI findings of a FLLDE has been ... [more ▼]

Introduction In human medicine, far lateral lumbar disc extrusion (FLLDE) represents 7 to 12% of all disc herniations and MRI is the method of choice for diagnosis. MRI findings of a FLLDE has been reported in one dog and the aim of this case report is to describe computed tomographic (CT) findings of a FLLDE in a dog. Methods A six-year-old neutered female Beagle with a good general health status was presented with a month history of left hind limb pain with shivering of this limb. Clinical examination revealed a left hind proprioceptive deficit but no pain was elicited at palpation. Results A CT scan pre- and post- contrast studies of the lumbosacral spine and a myelographic-CT were performed. A 1.3x0.6x0.3 cm homogeneous hyperattenuating (+/- 350 HU) ovoid structure was observed at the left lateral aspect of L6-L7 intervertebral disc space. The L6-L7 intervertebral disc nucleus pulposus was calcified but the annulus fibrosus had a normal non-calcified attenuation and seemed intact apart from a very thin hyperattenuating line next to the ovoid structure. This change was well circumscribed by an even hyperattenuating rim (1000HU) mimicking a thin dense cortex and was in close proximity with the annulus fibrosus and the left transverse process of L7. Perineural fat was not observed and contrast enhancement was visualized at the level of the left sixth lumbar nerve root with impingement and thickening of this root. No compression of the spinal cord was observed at this level on the myeloCT. These findings were suggestive of a dystrophic mineralization or an osteochondromatosis. FLLDE was considered less likely because of the almost normal appearance of the annulus fibrosus. At surgery some mixed gelified calcified material consistent with disc material was removed at the level of the left L6-L7 nerve root tract and disc fenestration was performed. The histological analysis confirmed the presence of degenerated herniated vertebral disk. Discussion/Conclusions In human medicine, MRI and CT scan are the main diagnostic modalities employed for diagnosis of FLLDE. In veterinary medicine, CT is often used to assess spinal diseases because of its availability. To the authors’ knowledge, CT findings of a FLLDE have not been described previously in dogs. Moreover, the thin dense cortex appearance surrounding the disc material was surprising. In conclusion, FLLDE should be included in the differential diagnosis of a calcified ovoid structure lateral to the spine even if the annulus fibrosus appears normal and if this structure is in close relation with the vertebral transverse process. [less ▲]

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See detailComputed tomography-guided injection of muscle-derived mesenchimal stem cells in the intervertebral disc of dogs affected by natural disc degeneration: clinical safety and intervertebral disc imaging assessment
Liotta, Annalisa Pia ULg; Sandersen, Charlotte ULg; Ceusters, Justine ULg et al

Poster (2016, September 01)

Introduction/Purpose: Pre-clinical randomized controlled animal trials have been conducted to evaluate the effects of mesenchymal stem cell (MSCs) transplantation on intervertebral disc (IVD) degeneration ... [more ▼]

Introduction/Purpose: Pre-clinical randomized controlled animal trials have been conducted to evaluate the effects of mesenchymal stem cell (MSCs) transplantation on intervertebral disc (IVD) degeneration. According to their histological results and to imaging assessment of the IVD, intradiscal injection of MSCs is effective, arresting or slowing IVDD process, and is associated with a low complication rate. Few of these studies have been conducted on canine artificially degenerated IVD, using bone marrow or adipose-derived MSCs. Therefore a systematic study on naturally degenerated IVD using MSCs obtained from autologous muscular tissue in dogs is still lacking. The aims of this study were to evaluate the clinical effects of intradiscal injection of muscle-derived MSCs and its effects on imaging features of the intervertebral disc. Methods: Eight experimental dogs were randomly included with the approval of the University’s Animal Care and Use Committee. The final inclusion criteria were the presence of naturally degenerated lumbosacral IVD detected on low-field magnetic resonance (MRI) images and the obtaining of 3 x 106 autologous muscle-derived MSCs. A computed tomography (CT) and MRI examination was performed before and 2 months after the procedure and 13 imaging parameters were assessed. Mesenchymal stem cells diluted in 0,2 ml of FRS Hypothermosol were injected in the lumbosacral IVD under CT-guidance. Clinical examinations were performed regularly during 1 month after the procedure. Results: Six dogs met the inclusion criteria. The remaining 2 dogs did not undergo intradiscal injections, but were used as control group. No major or minor complications were reported during the procedure. No abnormalities were noticed during the clinical examinations. No statistically significant variations of IVD imaging features were noticed before and after the injections. Discussion/Conclusions: Intradiscal injection of muscle-derived MSCs is clinically safe and it is not associated with any progression of the IVD degeneration, detected by CT or low-field MRI imaging. Further studies are needed to assess its efficacy as treatment for the canine natural IVD degeneration. [less ▲]

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See detailVisuo-spatial STM impairment link to a serial order component deficit in children with Velocardiofacial syndrome
Attout, Lucie ULg; Vossius, Line ULg; Noël, Marie-Pascale et al

Poster (2016, September 01)

Some previous studies showed that verbal short-term memory (STM) is better preserved than visuospatial STM in the velocardiofacial syndrome (VCFS), a neurodevelopmental disorder resulting from a 22q11.2 ... [more ▼]

Some previous studies showed that verbal short-term memory (STM) is better preserved than visuospatial STM in the velocardiofacial syndrome (VCFS), a neurodevelopmental disorder resulting from a 22q11.2 deletion. This deficit is generally assigned to a more global visuospatial skills deficit. However, for verbal STM, previous study suggested a specific deficit in the serial order component, processing considered as independent of modalities. In this study we proposed to explore the serial order component in visuospatial STM by contrasting simultaneous vs. sequential presentation of stimuli to maintain in children with VCFS, in order to see in what extent the deficit is global and resulting from visuospatial deficit or whether this deficit is specific to the serial order component. We tested a group of 27 children and adolescents with VCFS to a control group, matched on verbal IQ performance estimated. The VCFS group showed impaired performance on the sequential configuration but similar performance on the simultaneous condition. These results support the idea of an amodal serial order component in STM. The implication of serial order STM deficits on numerical cognition will be discussed. [less ▲]

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See detailLes supports des images : de la photographie à l’image numérique
Dondero, Maria Giulia ULg; Reyes, Everardo

in Revue Française des Sciences de l'Information et de la Communication (2016), 9

In this article we deal with questions related to images (painting, photography, digital image) from a semiotic standpoint, more precisely the form and substance of their expression plane. Classical ... [more ▼]

In this article we deal with questions related to images (painting, photography, digital image) from a semiotic standpoint, more precisely the form and substance of their expression plane. Classical greimasian semiotics –mainly through the works of Jean-Marie Floch (1985, 1986) and Félix Thürlemann (1982) – has concentrated on the relation between form of expression and form of content (thus in a semi-symbolic fashion). Then, in the 1990s, Jacques Fontanille started exploring the substance of expression. Later, within the framework of hierarchical levels of analysis, Fontanille (2005, 2008), introduced concepts such as material and formal support in order to distinguish between image as object and image as text. We take into account these works to study the close relationship between the substance of expression of images and the practices of production-reception. [less ▲]

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See detailMagnetically confined wind shocks in X-rays - A review
ud-Doula, Asif; Nazé, Yaël ULg

in Advances in Space Research (2016), 58

A subset (∼ 10%) of massive stars present strong, globally ordered (mostly dipolar) magnetic fields. The trapping and channeling of their stellar winds in closed magnetic loops leads to magnetically ... [more ▼]

A subset (∼ 10%) of massive stars present strong, globally ordered (mostly dipolar) magnetic fields. The trapping and channeling of their stellar winds in closed magnetic loops leads to magnetically confined wind shocks (MCWS), with pre-shock flow speeds that are some fraction of the wind terminal speed. These shocks generate hot plasma, a source of X-rays. In the last decade, several developments took place, notably the determination of the hot plasma properties for a large sample of objects using XMM and Chandra, as well as fully self-consistent MHD modeling and the identification of shock retreat effects in weak winds. Despite a few exceptions, the combination of magnetic confinement, shock retreat and rotation effects seems to be able to account for X-ray emission in massive OB stars. Here we review these new observational and theoretical aspects of this X-ray emission and envisage some perspectives for the next generation of X-ray observatories. [less ▲]

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See detailStrategies of the Walloon dairy breeders faced to the uncertain dairy future
Dalcq, Anne-Catherine ULg; Dogot, Thomas ULg; Soyeurt, Hélène ULg et al

Conference (2016, September 01)

This study observes the strategies, and their determinants, of the Walloon dairy breeders faced to the post quota perspective through the realization of 245 surveys, conducted from November 2014 to ... [more ▼]

This study observes the strategies, and their determinants, of the Walloon dairy breeders faced to the post quota perspective through the realization of 245 surveys, conducted from November 2014 to February 2015. Three kinds of strategical variables were defined and related to the evolution of milk production (MP) [the breeders who increase MP (HighMP) vs. keep constant MP (ConstantMP) vs. stop MP]; the valorisation of MP [alternative (ValMP) vs. classical] and the diversification of activities [with (DivMP) vs. without such activities]. The relationships between the chosen strategies and the quantitative technical variables were studied using generalized linear models. The independence between qualitative technical variables and the strategical variables was tested using Chi Square test. HighMP and ConstantMP bredeers represent 38.4% and 53.9% of respondents, respectively. HighMP breeders were significantly more declared as legal entity (p-value = 0.03), had more family members on the farm (p-value<0.01), larger agricultural area in property (p-value = 0.03) and higher MP quota (p-value = 0.01) compared to ConstantMP breeders. Only 9.8% of respondents decide to valorise differently MP. ValMP breeders tend to have more employees (p-value = 0.08) and an agricultural area less fragmented (p-value = 0.07) than classical breeders. A total of 7.8% of respondents decide to develop other activities. DivMP breeders tend to have more employees (p-value = 0.10), more agricultural area in property (p-value = 0.03) and a more recent year of installation (p-value < 0.01). Finally, 44.9% of ConstantMP breeders do not want to start an alternative valorisation of MP and diversify their activities. In conclusion, a relationship exists between, amongst others, the legal status, workforce available, characteristics of the agricultural area, the dairy production and the strategy chosen by the Walloon dairy breeders. [less ▲]

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See detailX-ray emission from interacting wind massive binaries: A review of 15 years of progress
Rauw, Grégor ULg; Nazé, Yaël ULg

in Advances in Space Research (2016), 58

Previous generations of X-ray observatories revealed a group of massive binaries that were relatively bright X-ray emitters. This was attributed to emission of shock-heated plasma in the wind-wind ... [more ▼]

Previous generations of X-ray observatories revealed a group of massive binaries that were relatively bright X-ray emitters. This was attributed to emission of shock-heated plasma in the wind-wind interaction zone located between the stars. With the advent of the current generation of X-ray observatories, the phenomenon could be studied in much more detail. In this review, we highlight the progress that has been achieved in our understanding of the phenomenon over the last 15 years, both on theoretical and observational grounds. All these studies have paved the way for future investigations using the next generation of X-ray satellites that will provide crucial information on the X-ray emission formed in the innermost part of the wind-wind interaction. [less ▲]

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See detailModels of rotating stars constrained by asteroseismic measurements of red giants
Eggenberger, P.; Lagarde, N.; Miglio, A. et al

in Astronomische Nachrichten (2016, September 01), 337(8-9), 832-836

Solar-like oscillations have now been characterized for a large number of stars, thanks to asteroseismic data obtained recently by space missions. This has led to the determination of the global and ... [more ▼]

Solar-like oscillations have now been characterized for a large number of stars, thanks to asteroseismic data obtained recently by space missions. This has led to the determination of the global and internal properties of these stars. In particular, core rotation rates have been obtained for red-giant stars, which is of prime importance to progress in the modelling of the dynamical processes at work in stellar interiors. In this presentation, we discuss which constraints can be brought by these asteroseismic measurements on stellar models that include rotational effects. Similarly to the solar case, we show that an efficient mechanism is required for the transport of angular momentum in the radiative zones of red giants. The efficiency of this transport process can be determined by asteroseismic observations of red-giant stars. [less ▲]

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See detailIntegrating Science and Technology into Sports: A Case Study of Sports Innovations in Belgium
Van Oudheusden, Michiel ULg; Van Hoyweghen, Ine

Conference (2016, September 01)

This paper explores the dynamic interplay between sports and innovation policies, research and development processes, and science-driven sports practices in Wallonia and Flanders (Belgium). Here, as in ... [more ▼]

This paper explores the dynamic interplay between sports and innovation policies, research and development processes, and science-driven sports practices in Wallonia and Flanders (Belgium). Here, as in other countries and regions, the aim of integrating science and technology into sports is now a leading sports policy principle and innovation strategy. Building on science and technology studies (STS) tools and methods (vision assessment, multi-site ethnography, foresight), the paper draws out the ethical, legal, and social issues (ELSI) induced by the use of new sciences and technologies in sports. These ELSI include the client-centered nature of sports science, which raises concerns about occupational control and athlete welfare, the uptake of genetic data in sports talent detection programs, and the challenges of coordinating "data-driven" and "intuitive" sports training approaches. It is argued that as sports are scientized and technologized, such ELSI demand to be addressed by sports innovators, governing bodies, and publics. By drawing critical attention to how sports are increasingly shaped by devices, data flows, and scientists, the paper states the case for bringing sports into STS and STS into sports. [less ▲]

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See detailAnalysis of Ocean in Situ Observations and Web - Based Visualization: From Individual Measurements to an Integrated View
Barth, Alexander ULg; Watelet, Sylvain ULg; Troupin, Charles et al

in Diviacco, Paolo; Leadbetter, Adam; Glaves, Helen (Eds.) Oceanographic and Marine Cross-Domain Data Management for Sustainable Development (2016)

The sparsity of observations poses a challenge common to various ocean disciplines. Even for physical parameters where the spatial and temporal coverage is higher, current observational networks ... [more ▼]

The sparsity of observations poses a challenge common to various ocean disciplines. Even for physical parameters where the spatial and temporal coverage is higher, current observational networks undersample a broad spectrum of scales. This situation is generally more severe for chemical and biological parameters because such sensors are less widely deployed. The present chapter describes the analysis tool DIVA (Data-Interpolating Variational Analysis) which is designed to generate gridded fields from in situ observations. DIVA has been applied to various physical (temperature and salinity), chemical (concentration of nitrate, nitrite and phosphate) and biological parameters (abundance of a species). The chapter also shows the technologies used to visualize the gridded fields. Visualization of analyses from in situ observations provide a unique set of challenges since the accuracy of the analysed field is not spatially uniform as it strongly depends on the location of the observations. In addition, an adequate treatment of the depth and time dimensions is essential. [less ▲]

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See detailDes acaricides contre les tiques
Lempereur, Laetitia ULg

Article for general public (2016)

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See detailComparing conventional excellence: moral and technical features of "good research"
Charlier, Nathan ULg

Conference (2016, September)

During a stay at Lancaster University, I was struck to discover how the institutional branding relied on the rhetoric of excellence. Several flags scattered over the campus are displaying statements such ... [more ▼]

During a stay at Lancaster University, I was struck to discover how the institutional branding relied on the rhetoric of excellence. Several flags scattered over the campus are displaying statements such as: "our physicists helped discover the Higgs boson particle", "Lancaster University is ranked among the top 10 universities in the UK", "our volcanologists made the first observation of a rare type of lava", etc. These quotes convey technologies such as rankings, but also moral and epistemological aspects regarding the role and status of scientific knowledge. This fostered my reflection regarding the fieldwork I made in different research institutions located in Belgium: while academic excellence is not at the core of their branding per se, it is indeed a key issue for many actors concerned with research governance. My paper proposes to map the different ways to frame the notion of excellence in four institutions: two large biotech research centres and two universities in Flanders and Wallonia. It relies on 25 semi-structured interviews with tenured academics involved in their institution's research management. The paper will compare how "good research" is valued in different settings: what counts when one evaluates the "excellence" of a scientific production/career? To which technologies, indicators and to which "moral principles" are interviewees referring to when they discuss excellence? How do they engage in criticizing certain framings and praise others? Eligible for the rhetoric or comparative panel, my contribution will present four distinct institutional conventions that govern research practices and sorts the good scientist from the bad. [less ▲]

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See detailAge-related changes in the modulation of attentional brain responses to sleep pressure at night
Schmidt, Christina ULg; Reichert, Carolin; Maire, Micheline et al

in Journal of Sleep Research (2016, September)

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See detailL'Expérience, l'Enjeu de Demain
Delcourt, Cécile ULg

Article for general public (2016)

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See detailStudy of Meta-Analysis Strategies for Network Inference using Information-Theoretic Approaches
Pham, Cam Ngoc ULg; Haibe-Kains; Bellot, Pau et al

in IEEE Dexa workshops 2016 (2016, September)

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See detailCircadian dynamics in measures of cortical excitation and inhibition balance
Chellappa, Sarah; Gaggioni, Giulia ULg; LY, Julien ULg et al

in Scientific Reports (2016), 6:33661

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See detailDetermination of iohexol and iothalamate in serum and urine by capillary electrophoresis.
Van Houcke, Sofie K.; Seaux, Liesbeth; Cavalier, Etienne ULg et al

in Electrophoresis (2016)

Estimation of glomerular filtration rate (eGFR) is essential to assess kidney function. Iodine containing contrast agents detection by HPLC has been proposed as a safe alternative for inulin or ... [more ▼]

Estimation of glomerular filtration rate (eGFR) is essential to assess kidney function. Iodine containing contrast agents detection by HPLC has been proposed as a safe alternative for inulin or radioactive compounds. However, HPLC is a time-consuming and labour-intensive method. The aim of this study was to develop an assay for iohexol and iothalamate using capillary electrophoresis (CE). Iohexol and iothalamate were directly analysed by CE in serum and urine, using photometric detection (246 nm). Serum peak height was proportional to iohexol and iothalamate concentrations. Detection limits for iohexol and iothalamate were 10 mg/L and 5 mg/L. Limits of quantification were 13.0 mg/L and 15.0 mg/L. Within-run CVs were 4.9% and 6.5%; between-run CVs 3.1-9.9% and 3.8-13.7%. A good correlation was observed between CE and HPLC: y = 1.1703 x + 5.017 (iohexol) and y = 0.7807 x + 11.01 (iothalamate) [y = concentration obtained by CE (mg/L), x = concentration obtained by HPLC (mg/L)]. In addition, CE allowed to determine urinary iohexol concentration. Although the detection limit for CE was higher than for HPLC, CE can still be used for eGFR determination. Advantages of this high throughput method are the absence of sample pretreatment and a minimal sample volume requirement. This article is protected by copyright. All rights reserved. [less ▲]

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See detailUse of NIR hyperspectral imaging to detect and quantify nodules on root system of associated crops
Eylenbosch, Damien ULg; Pierreux, Jérome ULg; Fernández Pierna, Juan Antonio et al

Poster (2016, September)

Winter wheat and peas cultivated in association and harvested when grains are dry show promising results in temperate areas. This association reach a good land equivalent ratio, reduce the nitrogen ... [more ▼]

Winter wheat and peas cultivated in association and harvested when grains are dry show promising results in temperate areas. This association reach a good land equivalent ratio, reduce the nitrogen fertilizer needs and obtain high quality harvest. These results are probably explained by the transfer of nitrogen from peas nodules to wheat roots. To test this hypothesis, quantification of nodules is required. Visual counting of nodules is time consuming and discrimination between the two kinds of roots is almost impossible. A new method is therefore needed. Near infrared hyperspectral imaging (NIR-HIS) was tested as a rapid method to quantify the amount of nodules and roots of each species in soil samples. [less ▲]

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See detailThe Case : Acute renal failure and refractory hyponatremia
denis, Chloé; JADOT, Virginie ULg; BOUQUEGNEAU, Antoine ULg et al

in Kidney International (2016), 90

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