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See detailEvaluation of computed tomographic anatomy of the equine metacarpophalangeal joint
Vanderperren, K.; Ghaye, Benoit ULg; Hoegaerts, M. et al

in American Journal of Veterinary Research (2008), 69(5), 631-638

OBJECTIVE: To determine the detailed computed tomography (CT) anatomy of the metacarpophalangeal (MCP) joint in healthy horses. SAMPLE POPULATION: 10 cadaveric forelimbs from 10 adult horses without ... [more ▼]

OBJECTIVE: To determine the detailed computed tomography (CT) anatomy of the metacarpophalangeal (MCP) joint in healthy horses. SAMPLE POPULATION: 10 cadaveric forelimbs from 10 adult horses without orthopedic disease. PROCEDURES: CT of the MCP joint was performed on 4 forelimbs. In 1 of the limbs, CT was also performed after intra-articular injection of 30 mL of contrast medium (40 mg of iodine/mL). Transverse slices 1-mm thick were obtained, and sagittal and dorsal planes were reformatted with a slice thickness of 2 mm. The CT images were matched with corresponding anatomic slices from 6 additional forelimbs. RESULTS: The third metacarpal bone, proximal sesamoid bones, and proximal phalanx could be clearly visualized. Common digital extensor tendon; accessory digital extensor tendon; lateral digital extensor tendon; superficial digital flexor tendon (including manica flexoria); deep digital flexor tendon; branches of the suspensory ligament (including its attachment); extensor branches of the suspensory ligament; collateral ligaments; straight, oblique, and cruciate distal sesamoidean ligaments; intersesamoidean ligament; annular ligament; and joint capsule could be seen. Collateral sesamoidean ligaments and short distal sesamoidean ligaments could be localized but not at all times clearly identified, whereas the metacarpointersesamoidean ligament could not be identified. The cartilage of the MCP joint could be assessed on the postcontrast sequence. CONCLUSIONS AND CLINICAL RELEVANCE: CT of the equine MCP joint can be of great value when results of radiography and ultrasonography are inconclusive. Images obtained in this study may serve as reference for CT of the equine MCP joint. [less ▲]

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See detailEvaluation of concrete substrate prior to overlay. Bonded concrete overlays – Recommendations and Applications
Courard, Luc ULg

Conference (2006)

The knowledge and analysis of the causes of degradations is the first step in repairing existing concrete structures. The assessment is performed by using destructive and non destructive methods. These ... [more ▼]

The knowledge and analysis of the causes of degradations is the first step in repairing existing concrete structures. The assessment is performed by using destructive and non destructive methods. These allow to detect modification of physical, chemical and/or mechanical properties of concrete: cracking, deformation, spalling, carbonation, …etc are various causes of distress, with potential irreversible consequences on concrete structure behaviour. A description of specific methods for pavements and structural slabs is proposed; it is usually recommended to combine complementary methods for efficient diagnosis. This chapter wants to offer an overview of techniques and references that could help the user in selecting the most appropriate investigation program. [less ▲]

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See detailEvaluation of cryopreservation techniques for goat embryos
Fiéni, F.; Beckers, Jean-François ULg; Buggin, M. et al

in Reproduction Nutrition Development (1995), 35

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See detailEvaluation of Ct Time-Density Curves of Lower-Limb Veins
Szapiro, D.; Ghaye, Benoît ULg; Willems, V. et al

in Investigative Radiology (2001), 36(3), 164-9

Szapiro D, Ghaye B, Willems V, et al. Evaluation of CT time-density curves of lower-limb veins. Invest Radiol 2001;36:164-169.RATIONALE AND OBJECTIVES: To evaluate time-density curves of the lower-limb ... [more ▼]

Szapiro D, Ghaye B, Willems V, et al. Evaluation of CT time-density curves of lower-limb veins. Invest Radiol 2001;36:164-169.RATIONALE AND OBJECTIVES: To evaluate time-density curves of the lower-limb veins for optimization of CT venography. METHODS: Fifty patients referred for chest CT were randomized into five equal groups. Five anatomic levels (abdomen, pelvis, proximal thigh, knee, and midcalf) were evaluated by a dynamic acquisition during 7 minutes. Computed tomography attenuation values of the veins, arteries, and adjacent muscles were measured for each level and plotted into curves versus time. Venous enhancement was also assessed qualitatively. RESULTS: Mean peak enhancement values of the inferior vena cava and the iliac, femoral, popliteal, anterior tibial, posterior tibial, and peroneal veins were, respectively, 112 +/- 16, 103 +/- 17, 93 +/- 23, 98 +/- 30, 112 +/- 28, 137 +/- 28, and 124 +/- 29 Hounsfield units. These were reached at 93 +/- 9.5, 129 +/- 15, 135 +/- 20, 147 +/- 57, 124 +/- 32, 123 +/- 17, and 123 +/- 18 seconds. Homogeneous opacification was obtained after 210 seconds. An optimal time window for CT venography was obtained between 210 and 240 seconds for the calf level and between 180 and 300 seconds for above-knee veins. CONCLUSIONS: For sequential CT venography, a caudocranial acquisition of the lower-limb veins, starting at 210 seconds, should allow optimal clot detection. [less ▲]

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See detailEvaluation of DCE-MRI postprocessing techniques to assess metastatic bone marrow in patients with prostate cancer
Michoux, Nicolas; SIMONI, Paolo ULg; Tombal, Bertrand et al

in Clinical Imaging (2012)

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See detailEvaluation of decision methodologies for analytical method validation
Rozet, Eric ULg; Rudaz, S.; Bouabidi, A. et al

Poster (2009)

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See detailEvaluation of deep water circulation with natural C-14 and helium-3 during OCMIP-2
Dutay, J.-C; Jean-Baptiste, P; Maier-Reimer, E. et al

Conference (2002, May)

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See detailEvaluation of dental pulp temperature rise during photo-activated decontamination (PAD) of caries: an in vitro study.
Nammour, S.; Zeinoun, T.; Bogaerts, I. et al

in Lasers in Medical Science (2009)

Photo-activated decontamination (PAD) has been reported in caries treatment as an aid in dentine decontamination. The aim of this study is to verify the harmlessness for pulp vitality of photo-activated ... [more ▼]

Photo-activated decontamination (PAD) has been reported in caries treatment as an aid in dentine decontamination. The aim of this study is to verify the harmlessness for pulp vitality of photo-activated decontamination (PAD) in caries treatment. Twenty freshly extracted single-rooted teeth were used. Deep class I cavities with a </= 0.5 mm dentine thickness between the floor of the cavity and the roof of cameral pulp were prepared. Following the manufacturer's instructions, cavities were filled with a photo-sensitizer (Phenothiazinechloride: 10 mg /ml), irradiated during 30 s with a 660-nm diode laser (output power: 40 mW in continuous wave; total delivered energy density: 4.87 J/cm(2)). Pulp temperature raises were recorded using a thermocouple (ALCr). Measurements were recorded every second during the irradiation and 150 s afterwards. Six records were repeated for each tooth. After 30 s of irradiation, the mean of temperature rise was 0.83 degrees C +/- 0.22 degrees C. All records showed temperature increases lower than the 3 degrees C (safety level for pulp injury). Based on our in vitro study, we can conclude that the dental pulp temperature rise following the use of PAD technique for the decontamination of dentine can be considered as save procedure for pulp vitality. [less ▲]

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See detailEvaluation of dietary stevioside supplementation on anti-human serum albumin immunoglobulin G, Alpha-1-glycoprotein, body weight and thyroid hormones in broiler chickens.
Daneshyar, M.; Geuns, J. M. C.; Willemsen, H. et al

in Journal of Animal Physiology & Animal Nutrition (2012), 96(4), 627-33

Sixty male broiler chickens fed a diet supplemented with 130 mg/kg stevioside (S group) or an unsupplemented diet (C group) from day 1 of age onwards. On day 21 of age, ten birds from either the S (SH) or ... [more ▼]

Sixty male broiler chickens fed a diet supplemented with 130 mg/kg stevioside (S group) or an unsupplemented diet (C group) from day 1 of age onwards. On day 21 of age, ten birds from either the S (SH) or C (CH) group were injected subcutaneously with 100 mug human serum albumin (HSA) and ten others from either S (SP) or C (CP) group injected with 100 mul phosphate-buffered saline (PBS) in the same way. There were no significant effect of supplementation nor interaction with age on average body weights, T(3) and T(4) concentrations of non-injected chickens. After the primary immunization, alpha(1) -glycoprotein concentrations increased in all treatment groups except the CP group, and were significantly higher in the CH group in relation to the other groups. Fourteen and 18 days after the primary immunization, HSA injected chickens of both dietary treatments had significantly higher anti-HSA immunoglobulin G (IgG) levels than their PBS injected controls. No effect of stevioside supplementation was observed for IgG level. In conclusion, dietary stevioside inclusion can attenuate the pro-inflammatory response after stimulation of the innate immune response in broiler chickens. [less ▲]

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See detailEvaluation of different advanced finite element concepts for detailed stress analysis of laminated composite structures
Rah, K.; Van Paepegem, W.; Habraken, Anne ULg et al

in International Journal of Material Forming (2009), volume 2(Supplément 1), 943-947

Despite their high specific stiffness and strength, laminated composite materials, e.g. fibre-reinforced plastic plies stacked at different fibre orientations, are susceptible to damage. Damage can be ... [more ▼]

Despite their high specific stiffness and strength, laminated composite materials, e.g. fibre-reinforced plastic plies stacked at different fibre orientations, are susceptible to damage. Damage can be divided into interalaminar damage and interlaminar damage. Delamination is a typical kind of interlaminar damage which occurs in laminated composite materials, often accompanied with intralaminar damage, and may lead to a catastrophic structural collapse. The first and most crucial step in the prediction of failure of Laminated Composite Structures (LCS) is to accurately determine the stresses, particularly the three transverse stress components, also called the interlaminar stresses. It is proposed in the present paper that the integration of a displacement based solid-shell formulation and partial-hybrid stress formulation will lead to an accurate and robust solid-shell element, suitable for the efficient and detailed interlaminar stress calculation. [less ▲]

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See detailEvaluation of different bone markers in hemodialyzed patients
Cavalier, Etienne ULg; Delanaye, Pierre ULg; Collette, Julien ULg et al

in Clinica Chimica Acta (2006), 371(1-2), 107-111

Background: Routinely, nephrologists rely on different biochemical markers like intact PTH (iPTH), bone-specific alkaline phosphatase (BALP), plasmatic calcium and phosphate. The aim of the present study ... [more ▼]

Background: Routinely, nephrologists rely on different biochemical markers like intact PTH (iPTH), bone-specific alkaline phosphatase (BALP), plasmatic calcium and phosphate. The aim of the present study was to evaluate different other bone markers like N-terminal propeptide of type I procollagen (PINP), active isoform 5b of the tartrate-resistant acid phosphatase (TRAP 5b) and beta-crossLaps (R) (CTXS) as well as full-length PTH (wPTH), presumed non-(1-84) PTH, and their ratio in the diagnosis of renal osteodystrophy with high and low turnover. We also determined 25 hydroxyvitamin D (25VTD), 1-25 dihydroxyvitamin D and homocystein (HCY). Methods: We performed those parameters on 73 patients with end-stage renal disease according to the manufacturers' instructions. Results: There were very strong correlations between the bone markers concentrations, particularly between BALP and PINP (r=0.953). We did not observe any correlation between the ratio whole PTH/non-(1-84) PTH and any of the usual bone markers. This ratio was significantly (p < 0.05) higher in low and high bone turnover patients than in normal patients according to the K/DOQI. We found a correlation between low levels of 25VTD and high levels of HCY Conclusions: BALP offers the best clinical and analytical profile as the easier marker of choice in hemodiallyzed patients for the diagnosis of bone disease. (c) 2006 Elsevier B.V All rights reserved. [less ▲]

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See detailEvaluation of dispersant efficiency for aqueous alumina slurries by concurrent techniques
Gaydardzhiev, Stoyan ULg; Ay, Peter

in Journal of Dispersion Science & Technology (2006), 27(3), 413-417

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See detailEVALUATION OF EARTHQUAKE- TRIGGERED LANDSLIDES IN EL SALVADOR USING A GIS- BASED NEWMARK MODEL
Garcia-Rodriguez, MJ; Havenith, Hans-Balder ULg; Benito, B.

in The 14th World Conference on Earthquake Engineering (2008, October)

In this work, a model for evaluating earthquake-triggered landslides hazard following the Newmark methodology is developed in a Geographical Information System (GIS). It is applied to El Salvador, one of ... [more ▼]

In this work, a model for evaluating earthquake-triggered landslides hazard following the Newmark methodology is developed in a Geographical Information System (GIS). It is applied to El Salvador, one of the most seismically active regions in Central America, where the last severe destructive earthquakes occurred in January 13th and February 13th, 2001. The first of these earthquakes triggered more the 500 landslides and killed at least 844 people. This study is centred on the area (10x6km) where the most tragic landslide occurred (Las Colinas landslide). The model is based on the Newmark method, which treats a potential landslide as a rigid block sliding on an inclined plane. It requires inputs characterizing the geological conditions and the intensity of earthquake ground motions. The procedure includes factors such as earthquake magnitude, source-site distance, strength of geologic materials, ground water conditions and slope. The data set used in the application includes an earthquake-triggered landslides inventory for the 2001 earthquakes, a 1:100,000-scale geologic map of the region, digital cartography, strong-motion records, data on engineering properties of geologic units, and high-resolution (10 m) digital elevation models of the topography, all of them integrated in the GIS. Displacements of possible landslides along the slope (Newmark displacements) are computed from the Arias Intensity (Ia), and the Critical Acceleration (ac); the latter is inferred from the Factor of Safety (Fs). Newmark displacements have been applied to predict a landslide hazard map at regional scale, in areas where ground-shaking and geological conditions are well known. [less ▲]

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See detailEvaluation of Eddy Losses Due to High Current Leads in Transformers Using a Subproblem Method
V.Ferreira da Luz, Mauricio; Dular, Patrick ULg; Dang, Quoc Vuong ULg et al

in ISEF 2011 - XV International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering (ISEF2011 ) (2011, September)

A subproblem finite element method is developed for evaluating the eddy losses due to high current leads in transformers. The structural component of the transformer is modeled with classical volumetric ... [more ▼]

A subproblem finite element method is developed for evaluating the eddy losses due to high current leads in transformers. The structural component of the transformer is modeled with classical volumetric elements or more efficiently with a thin shell model (surface impedance technique). Tools are then developed to correct the inaccuracies near edges and corners inherent to thin shell models for magnetodynamic problems. Improvements of local fields make possible accurate calculations of eddy losses and of temperature rise. [less ▲]

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See detailEvaluation of efficacy and safety of oral tiludronate in Paget's disease of bone: a double-blind, dose-ranging, placebo-controlled study
Reginster, Jean-Yves ULg; Colson, F; Morlock, G et al

in Arthritis and Rheumatism (1993), 36

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See detailEvaluation of elbow biomechanical models using data fusion: Application to elbow flexion
Leboucher, Julien; Schwartz, Cédric ULg; Brochard, Sylvain et al

in Gait & Posture (2009), 30(2009), 60-61

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See detailEvaluation of Electronic Nose Technology for Early-warning of Bio-methanation Process Disturbance
Adam, Gilles ULg

Doctoral thesis (2013)

An electronic nose (e-nose) is an instrument composed of an array of non specific gas sensors inspired by the biological olfactory system for the detection and recognition of odours. In this work, this ... [more ▼]

An electronic nose (e-nose) is an instrument composed of an array of non specific gas sensors inspired by the biological olfactory system for the detection and recognition of odours. In this work, this technology is evaluated to predict process disorders in agricultural anaerobic digestion reactors. Response of the sensor array is used to recognize a gas mixture by the use of multivariate data analysis techniques. In our case, an e-nose developed in our laboratory and composed of metal oxide semi-conductor gas sensors was equipped with a biogas dilution system to realize the measurements. When employed on small-scale digesters fed with simple feeding substrates (sucrose, lipids, mixture lipids and sucrose), the e-nose presented enthusiastic results for the detection of organic overload disorders. Multivariate process control charts were employed with the e-nose data to obtain a simple state indicator represented by the Hotelling's T² statistics. This indicator resumes the general state of the digesters when its value exceeds statistically defined control limit. Instability periods and recovery of the anaerobic digestion process when exposed to organic overfeeding could be thus precisely assessed. In addition, the use of a variety of substrates had no significant effect on the performance of the e-nose monitoring. Variations of methane content in biogas, as a result of use of substrates of different compositions, had neither any influence on the e-nose monitoring quality. Thereafter, an e-nose was placed online on continuously stirred tank reactor of 100 L over a period of 300 days. A multivariate monitoring method using recursive and adaptive principal component analysis (PCA) was applied to the e-nose data. This enabled to very efficiently compensate system drift and notably sensor drift. Moreover, adaptive PCA model could also adapt to environmental variations and to reactor slow shifts. T² statistics and its squared prediction error (SPE) obtained from the PCA model are very competitive state indicators compared to pH, alkalinity, gas production rate and methane and carbon dioxide content. Two electronic noses were also evaluated in real-scale agricultural anaerobic digestion plants. The low process state monitoring in both plants does not enable to conclude to the relevance of disorders observed by the e-nose apparatus and demonstrates the real need for online anaerobic digestion process state monitoring and its subsequent optimization in agricultural biogas plants. Even though, the performance of the recursive PCA monitoring is much superior to that of static PCA. Adaptive PCA proves to be a potential automatic drift and environmental variations correction method for online and real-time e-nose measures, notably for field applications. In conclusion, it was demonstrated in this work that e-nose technology has a real potential as an application of online monitoring of anaerobic digester state. Moreover, this research demonstrated that it was possible to realize a monitoring of the state of anaerobic digesters using only gas phase measurements. Another contribution is the use of multivariate process control techniques on e-nose data to obtain a simple state indicator as well as the use of adaptive PCA to automatically compensate drift and environmental effects on e-nose measurements. [less ▲]

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See detailEvaluation of erythroid marrow response to recombinant human erythropoietin in patients with cancer anaemia.
Ponchio, L.; Beguin, Yves ULg; Farina, G. et al

in Haematologica (1992), 77(6), 494-501

BACKGROUND. Anaemia is a frequent finding in patients with cancer and may be due to different causes, including blunted erythropoietin production. MATERIALS AND METHODS. In a pilot study, we administered ... [more ▼]

BACKGROUND. Anaemia is a frequent finding in patients with cancer and may be due to different causes, including blunted erythropoietin production. MATERIALS AND METHODS. In a pilot study, we administered recombinant human erythropoietin (rHuEPO) to twelve patients with solid tumours and secondary anaemia. rHuEPO was given subcutaneously 5 d per week at escalating doses (75 to 150 U/kg per day): the aim of treatment was a Hb level > or = 10 g/dl without blood transfusion. We evaluated endogenous EPO production through serum EPO levels and erythroid marrow activity by means of serum transferrin receptor (TfR). RESULTS. Six out of 12 subjects had defective endogenous EPO production. All patients but two responded to treatment with steady increases in Hb levels above 10 g/dl, and the median dose of rHuEPO required for correction of anaemia was 75 U/kg. Response was associated with an early increase in serum TfR. Six patients developed functional iron deficiency and required iron supplementation to obtain response. Treatment improved functional ability in 4/10 responders. CONCLUSIONS. Subcutaneous rHuEPO can stimulate erythroid marrow activity in cancer anaemia, even in patients with advanced disease, and marrow response can be adequately monitored by serum TfR. Functional iron deficiency as a cause of nonresponse to rHuEPO is frequent in these patients and may require parenteral iron administration. Although erythropoietin can improve the anaemia of cancer, the decision to treat should be individualised for each patient, looking more at the quality of life and cost-effectiveness than at cosmetic increases in the haemoglobin level. [less ▲]

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