Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailComparison of accuracy of sonography, rectal palpation, and pregnancy-associated glycoproteins tests for pregnancy diagnosis in cows
Gajewski, Z.; Petrajtis, M.; Melo de Sousa, Noelita ULg et al

in Proceedings of the XIth Middle European Buiatrics Congress (2010)

Detailed reference viewed: 38 (2 ULg)
Full Text
Peer Reviewed
See detailComparison of accuracy of transabdominal ultrasonography, progesterone and pregnancy-associated glycoproteins tests for discrimination between single and multiple pregnancy in sheep
Karen, A.; El Amiri, B.; Beckers, Jean-François ULg et al

in Theriogenology (2006), 66(2), 314-322

The aim of the present study was to evaluate and, compare the accuracy of transabdominal ultrasonographic (US) and the progesterone (P4-RIA) and ovine pregnancy-associated glycoprotein (ovPAG-RIA) tests ... [more ▼]

The aim of the present study was to evaluate and, compare the accuracy of transabdominal ultrasonographic (US) and the progesterone (P4-RIA) and ovine pregnancy-associated glycoprotein (ovPAG-RIA) tests for the discrimination between single and multiple pregnancy in sheep. One hundred pregnant Awassi x Merino ewes were scanned by transabdominal ultrasonography (3.5 MHz linear-array transducer) at Days 43-56 and 81 of these ewes were scanned at Days 76-87 of gestation. The ewes were scanned in dorsal recumbency at the bare area of the inguinal regions (without pre-scanning shaving of the ventral abdominal wall). After each scan, blood samples were withdrawn from the jugular vein to estimate the levels of P4 and ovPAG by radioimmumoassay. At lambing, 61 ewes gave birth to single lambs and 39 ewes gave birth to multiples. The sensitivity of the transabdominal US, the P4-RIA and the ovPAG-RIA tests for determining ewes carrying multiples was 54, 64.1 and 64.1% at Days 43-56. At Days 76-87 of gestation these accuracies were 60.0, 66.7 and 76.6% for the US, P4-RIA and PAG-RIA tests, respectively. The specificity of the transabdominal US, the P4-RIA and the ovPAG-RIA tests for determining ewes carrying singles, was 78.6, 60.7 and 62.3% at Days 43-56 and 78.4, 64.7 and 70.6% at Days 76-87 of gestation, respectively. It is concluded that the accuracy of transabdominal ultrasonographic (without pre-scanning shaving of the ventral abdominal wall), the P4- and the ovPAG-RIA tests for determination of the fetal numbers in Awassi x Merino crossbred ewes is too low to be used in the field. (c) 2005 Elsevier Inc. All rights reserved. [less ▲]

Detailed reference viewed: 25 (3 ULg)
Full Text
Peer Reviewed
See detailComparison of accuracy of ultrasonography, progesterone and pregnancy-associated 4 glycoprotein tests for pregnancy diagnosis in semi-domesticated reindeer
Savela, Hannele; Vahtiala, S.; Lindeberg, H. et al

in Theriogenology (2009), 72

The aim of the study was to compare transrectal ultrasound with progesterone (P4) and pregnancy-associated glycoproteins (PAG) as pregnancy detection methods for semi-domesticated reindeer in field ... [more ▼]

The aim of the study was to compare transrectal ultrasound with progesterone (P4) and pregnancy-associated glycoproteins (PAG) as pregnancy detection methods for semi-domesticated reindeer in field conditions. Female reindeer (n=195) were scanned transrectally by a 7.5 MHz linear array transducer and blood sampled either in Dec 2005 (n=33), Dec 2006 (n=92) or Jan 2007 (n=70) during early- or mid-gestation. Plasma levels of P4 and PAG were assessed by RIA. Based on calving records, the sensitivity, specificity, predictive values and the overall accuracy of the three tests were calculated. The overall calving rate calculated from the calving records was 86.2%. The overall accuracy of transrectal ultrasound was 99.5%. The sensitivity and specificity of transrectal ultrasound were 99.4% and 100%, respectively. In the plasma P4 test, the threshold level of 5.5 nmol/L gave the highest overall accuracy (93.3%). The sensitivity of the P4 test decreased from 96.4% to 81.5%, when the threshold level increased from 5.0 nmol/L to 8.0 nmol/L, while the specificity remained at 85.2% over the range of these cut-off values. The overall accuracy of the plasma PAG test decreased from 96.4% to 64.1% when the plasma PAG threshold level increased from 0.5 ng/mL to 3.5 ng/mL, whereas sensitivity decreased from 99.4% to 58.3%. Specificity increased from 77.8% to 100% when the plasma PAG threshold level reached 3.0 ng/mL. Transrectal ultrasound showed higher diagnostic values than plasma P4-RIA and PAG-RIA in diagnosing pregnancy of reindeer, with the advantage that diagnoses can be made in real-time in field conditions [less ▲]

Detailed reference viewed: 49 (6 ULg)
Full Text
Peer Reviewed
See detailComparison of acid and enzymatic methods for insulin dosage: Analytical performances and impact on glomerular filtration rate evaluation
DELANAYE, Pierre ULg; Thibaudin, L.; Souvignet, M. et al

in Clinica Chimica Acta (2012), 413(5-6), 556-560

Among issues susceptible to hamper a reliable measurement of inulin clearance, those regarding the dosage of inulin are largely neglected. We have compared the analytical performances of 2 commonly used ... [more ▼]

Among issues susceptible to hamper a reliable measurement of inulin clearance, those regarding the dosage of inulin are largely neglected. We have compared the analytical performances of 2 commonly used methods of inulin dosage (one “acid” and one “enzymatic” method) and studied their potential impact on the glomerular filtration rate (GFR) value given by inulin clearance. Repeatability, uncertainty and the beta-expectation limits were evaluated from pre-determined serum and urine pools of inulin. Agreement between the two methods was analyzed from 99 inulin clearances performed in renal transplant patients. Impact of the method of dosage on GFR evaluation was simulated according to the respective beta-expectations limits of each method. Overall, intra-assay coefficient of variability and relative bias were inferior to 5% and 10% for both methods. Contrary to the acid method, analytical performance of the enzymatic method was not influenced by the presence of glucose. The relative difference in GFR values obtained with the two methods in transplant patients was − 0.4 ± 10%. Simulations suggested that changes in inulin concentration attributable to analytical error could modify the value of GFR from − 12% to + 28%. In conclusion, while analytical performances are globally acceptable for both methods, they are not strictly equivalent. The impact on the determination of GFR, albeit limited, is not negligible and adds to other sources of inaccuracy. International standardization for the dosage of inulin is necessary. [less ▲]

Detailed reference viewed: 23 (0 ULg)
Full Text
Peer Reviewed
See detailComparison of active and electrostimulated recovery strategies after fatiguing exercise
Vanderthommen, Marc ULg; Makrof, Souleyma; Demoulin, Christophe ULg

in Journal of Sports Science & Medicine (2010), 9

The purpose of this study was to compare an electrostimulated to an active recovery strategy after a submaximal isometric fatiguing exercise. Nineteen healthy men completed three sessions (separated by at ... [more ▼]

The purpose of this study was to compare an electrostimulated to an active recovery strategy after a submaximal isometric fatiguing exercise. Nineteen healthy men completed three sessions (separated by at least 4 weeks) which included a knee extensors provocation exercise consisting of 3 sets of 25 isometric contractions. Contraction intensity level was fixed respectively at 60%, 55% and 50% of previously determined maximal voluntary contraction for the first, second and third sets. This provocation exercise was followed by either an active (AR) recovery (25 min pedaling on a cycle ergometer), an electrostimulated (ESR) recovery (25-min continuous and nontetanic (5 Hz) stimulation of the quadriceps) or a strictly passive recovery (PR). Peak torques of knee extensors and subjective perception of muscle pain (VAS, 0-10) were evaluated before (pre-ex), immediately after the provocation exercise (post-ex), after the recovery period (post-rec), as well as 75 minutes (1h15) and one day (24h) after the exercise bout. Time course of peak torque was similar among the different recovery modes: ~ 75% of initial values at post-ex, ~ 90% at post-rec and at 1h15. At 24h, peak torque reached a level close to baseline values (PR: 99.1 ± 10.7%, AR: 105.3 ± 12.2%, ESR: 104.4 ± 10.5%). VAS muscle pain scores decreased rapidly between post-ex and postrec (p < 0.001); there were no significant differences between the three recovery modes (p = 0.64). In conclusion, following a submaximal isometric knee extension exercise, neither electrostimulated nor active recovery strategies significantly improved the time course of muscle function recovery. [less ▲]

Detailed reference viewed: 176 (21 ULg)
Peer Reviewed
See detailComparison of acute biochemical variations induced by ingestion of different calcium salts in healthy volunteers
Reginster, Jean-Yves ULg; Denis, D; Bartsch, Valérie ULg et al

in Revue du Rhumatisme et des Maladies Osteo-Articulaires (1992), 59

Detailed reference viewed: 13 (2 ULg)
Full Text
Peer Reviewed
See detailComparison of acute inflammatory and chronic structural asthma-like responses between C57BL/6 and BALB/c mice
Van Hove, C. L.; Maes, T.; Cataldo, Didier ULg et al

in International Archives of Allergy & Immunology (2009), 149(3), 195-207

BACKGROUND: The interactions between airway responsiveness, structural remodelling and inflammation in allergic asthma remain poorly understood. Prolonged challenge with inhaled allergen is necessary to ... [more ▼]

BACKGROUND: The interactions between airway responsiveness, structural remodelling and inflammation in allergic asthma remain poorly understood. Prolonged challenge with inhaled allergen is necessary to replicate many of the features of airway wall remodelling in mice. In both mice and humans, genetic differences can have a profound influence on allergy, inflammation, airway responsiveness and structural changes. METHODS: The aim of this study was to provide a comparative analysis of allergen-induced airway changes in sensitized BALB/c and C57BL/6 mice that were exposed to inhaled allergen for 2 ('acute'), 6 or 9 weeks ('chronic'). Inflammation, remodelling and responsiveness were analyzed. RESULTS: Both strains developed a Th-2-driven airway inflammation with allergen-specific IgE, airway eosinophilia and goblet cell hyperplasia upon 2 weeks of allergen inhalation. This was accompanied by a significant increase in airway smooth muscle mass and hyperresponsiveness in BALB/c but not in C57BL/6 mice. However, airway eosinophilia was more pronounced in the C57BL/6 strain. Chronic allergen exposure (6 or 9 weeks) resulted in an increase in airway smooth muscle mass as well as subepithelial collagen and fibronectin deposition in both strains. The emergence of these structural changes paralleled the disappearance of inflammation in both C57BL/6 and BALB/c mice and loss of hyperresponsiveness in the BALB/c strain. TGF-beta(1 )was accordingly elevated in both strains. CONCLUSION: Airway inflammation, remodelling and hyperresponsiveness are closely intertwined processes. Genetic background influences several aspects of the acute allergic phenotype. Chronic allergen exposure induces a marked airway remodelling that parallels a decreased inflammation, which was largely comparable between the two strains. [less ▲]

Detailed reference viewed: 23 (2 ULg)
Full Text
See detailComparison of Adaptive Filtering Schemes for Gas Turbine Performance Diagnostics
Borguet, Sébastien ULg; Léonard, Olivier ULg

in Proceedings of the 4th International Conference on Advanced Computational Methods in Engineering (2008)

Kalman filters are widely used in the turbine engine community for health monitoring purpose. This algorithm has proven its capability to track gradual deterioration with a good accuracy. On the other ... [more ▼]

Kalman filters are widely used in the turbine engine community for health monitoring purpose. This algorithm has proven its capability to track gradual deterioration with a good accuracy. On the other hand, its response to rapid deterioration is either a long delay in recognising the fault, and/or a spread of the estimated fault on several components. The main reason of this deficiency lies in the transition model of the parameters that assumes a smooth evolution of the engine condition. The aim of this contribution is to compare two adaptive diagnosis tools that combine a Kalman filter and a secondary system that monitors the residuals. This auxiliary component implements on one hand a covariance matching scheme and on the other hand a generalised likelihood ratio test to improve the behaviour of the diagnosis tool with respect to abrupt faults. [less ▲]

Detailed reference viewed: 35 (4 ULg)
Full Text
Peer Reviewed
See detailComparison of adaptive filters for gas turbine performance monitoring
Borguet, Sébastien ULg; Léonard, Olivier ULg

in Journal of Computational & Applied Mathematics (2010), 234(7), 2202-2212

Kalman filters are widely used in the turbine engine community for health monitoring purpose. This algorithm has proven its capability to track gradual deterioration with a good accuracy. On the other ... [more ▼]

Kalman filters are widely used in the turbine engine community for health monitoring purpose. This algorithm has proven its capability to track gradual deterioration with a good accuracy. On the other hand, its response to rapid deterioration is either a long delay in recognizing the fault, and/or a spread of the estimated fault on several components. The main reason of this deficiency lies in the transition model of the parameters that assumes a smooth evolution of the engine condition. The aim of this contribution is to compare two adaptive diagnosis tools that combine a Kalman filter and a secondary system that monitors the residuals. This auxiliary component implements on one hand a covariance matching scheme and on the other hand a generalised likelihood ratio test to improve the behaviour of the diagnosis tool with respect to abrupt faults. [less ▲]

Detailed reference viewed: 74 (9 ULg)
Full Text
Peer Reviewed
See detailA comparison of advanced thermal cycles suitable for upgrading existing power plant
Heyen, Georges ULg; Kalitventzeff, Boris ULg

in Applied Thermal Engineering (1999), 19(3), 227-237

In view of the constant growth of electricity usage and public pressure to reduce the dependence on nuclear power plants in the energy supply, solutions are sought to increase the capacity of power plants ... [more ▼]

In view of the constant growth of electricity usage and public pressure to reduce the dependence on nuclear power plants in the energy supply, solutions are sought to increase the capacity of power plants using fossil fuels. Highly efficient cycles are available : gas turbines combined with waste heat boilers and steam cycles are able to achieve efficiencies above 50-55%. However building new plants requires a large amount of capital. Alternative proposals are based on upgrades of existing plants : capital savings are expected by reusing part of the facilities. In the present study, three parallel proposals are compared on the basis of exergy efficiency; cost of investment and flexibility of operation are also discussed. They are compared with classical Rankine cycle and state of the art combined cycles. (C) 1998 Elsevier Science Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 32 (5 ULg)
Full Text
Peer Reviewed
See detailA comparison of advanced thermal cycles suitable for upgrading existing power plants
Heyen, Georges ULg; Kalitventzeff, Boris ULg

in Applied Thermal Engineering (1998), 19

Detailed reference viewed: 7 (3 ULg)
Full Text
Peer Reviewed
See detailComparison of age-dependent quantitative changes in the male labial gland secretion of Bombus terrestris and Bombus lucorum.
Zacek, Petr; Kalinova, Blanka; Sobotnik, Jan et al

in Journal of Chemical Ecology (2009), 35(6), 698-705

Age-related changes of antennal-active components of male labial gland extracts were studied in two closely related bumblebee species, Bombus terrestris and B. lucorum. In B. terrestris, compounds ... [more ▼]

Age-related changes of antennal-active components of male labial gland extracts were studied in two closely related bumblebee species, Bombus terrestris and B. lucorum. In B. terrestris, compounds eliciting electroantennogram (EAG) responses of virgin queens were ethyl dodecanoate, 2,3-dihydrofarnesal, 2,3-dihydrofarnesol, hexadecan-1-ol, octadeca-9,12,15-trien-1-ol, and geranylcitronellol. Compounds that elicited EAG responses from queens of B. lucorum were ethyl dodecanoate, ethyl tetradec-7-enoate, ethyl tetradec-9-enoate, ethyl hexadec-9-enoate, hexadecan-1-ol, hexadec-7-enal, octadeca-9,12-dien-1-ol, octadeca-9,12,15-trien-1-ol, and octadecan-1-ol. Quantities of these compounds in the labial glands changed significantly over the lifetime of the respective males of the two species. In both species, concentrations of the respective compounds reached their maximum within seven days after eclosion. Subsequently, a rapid decrease in the amount of EAG-active compounds occurred in B. terrestris, whereas in B. lucorum the amount of active compounds stayed approximately constant or decreased at a slow rate. Microscopy showed that in B. terrestris secretory cells of the labial glands undergo apoptosis from the fifth to the tenth day of life, whilst in B. lucorum labial gland cells remain unchanged throughout the life of the males. [less ▲]

Detailed reference viewed: 49 (4 ULg)
Full Text
Peer Reviewed
See detailComparison of agricultural soils' structure depending on tillage system using X-ray microtomography
Beckers, Eléonore ULg; Ly, Sarann ULg; Léonard, Angélique ULg et al

in Geophysical Research Abstracts (2010, May), 12

This study aims at characterizing agricultural soils’ structure depending on the tillage system: conventional tillage or conservational tillage. Tillage reduction is an increasing practice, but the micro ... [more ▼]

This study aims at characterizing agricultural soils’ structure depending on the tillage system: conventional tillage or conservational tillage. Tillage reduction is an increasing practice, but the micro-structural effects on soils and on their hydrodynamic parameters are still not well described. Recent research shows non-converging results. Our point is to highlight fundamental differences in structure through characterization of soils porosity’s parameters using X-ray microtomography measurements coupled to image analysis. This attempt is in line with a more integrated experiment of which the aim is to quantify the effects of tillage intensity on lateral flow production, and finally on global water balance. Parameters’ measurements consist in a combined approach, based on two different space-time scales of exploration: fundamental scale, with soil sampling campaign for microtomography analysis, and field scale, with continuous flow measurements (plots’ dimensions: 18*28 m). For their part, parameters for water balance determination (precipitation, evapotranspiration…) are monitored on the field. All of these measurements have the main objective of hydrological modeling enhancement by taking into account a better lateral flow description. Discussion in this paper will focus on the first results obtained by X-ray microtomography measurements. Our experiment takes place in Gentinnes (Walloon Brabant, Belgium), on a field organized in a split-plot scheme. Since 2004, plots have been cultivated in conventional tillage or in reduced tillage. The latter consists in sowing after stubble ploughing of about 10cm. The crop rotation is sugar beet followed by winter wheat. The soil is mainly composed of silt loam. Soils samples, with a 3 cm diameter and a 5 cm height, were removed from the upper layer (Ap horizon) for both management practices. Samples are scanned by X-ray microtomography using a Skyscan-1172 high-resolution desk-top micro-CT system (Skyscan, Kontich, Belgium). The cone beam source operated at 100 kV, using an aluminium filter. The detector configuration, i.e. 1048×2000 pixels 16-bit X-ray camera, and the distance source-object-camera were adjusted to produce images with a pixel size of 17 µm. This resolution allows us to visualize both meso- and macro- porosity. In this study, half the samples were placed under a 15000 kPa pressure (corresponding pressure for the wilting point) in Richards’ apparatus in order to empty the meso- and macro-porosity. To determine a priori the class of porosity for the samples, relations between water retention and pressure head can be plotted using this apparatus. Scanning results consist in 2D images. The 2D images are recombined to form 3D structure. Then the pore network can be analyzed through useful factors like size distribution, shape, connectivity, orientation, tortuosity etc. [less ▲]

Detailed reference viewed: 113 (58 ULg)
Full Text
Peer Reviewed
See detailComparison of alcohol precipitation and membrane filtration effects on sugar beet pulp pectin chemical features and surface properties
Yapo, B. M.; Wathelet, Bernard ULg; Paquot, Michel ULg

in Food Hydrocolloids (2007), 21(2), 245-255

Two different procedures, alcohol precipitation with washing (APW) and a 10 kD MWCO membrane ultrafiltration with diafiltration (UF-DF), for pectin recovering and purification from crude aqueous extracts ... [more ▼]

Two different procedures, alcohol precipitation with washing (APW) and a 10 kD MWCO membrane ultrafiltration with diafiltration (UF-DF), for pectin recovering and purification from crude aqueous extracts were investigated. The results showed that the yield, purity, chemical, and physicochemical features of isolated pectins depended upon the type of procedure used. The APW technique gave a higher pectin yield, and the isolated pectin contained more neutral sugars, more proteins, and more ash but less galacturonic acids than the 10 kD membrane UF-DF one. The weight-average molar mass of the APP was lower and its emulsifying properties slightly better than those of the UFPR10. Molar mass distribution of APP or UFPR10 showed two distinct pectin fractions peaks, which were separated in high-MW and low-MW pectin fractions using a 50kD MWCO membrane. The high-MW fractions exhibited poor emulsifying and emulsion stabilizing abilities whereas the low-MW fractions displayed a much higher emulsifying ability than the initial pectin fractions. Therefore, it was inferred that the ability of beet pectin to be an effective emulsifier and/or emulsion stabilizer was greatly dependent on its weight-average molar mass. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 70 (9 ULg)
Full Text
Peer Reviewed
See detailComparison of ammonia and greenhouse gas emissions during the fattening of pigs, kept either on fully slatted floor or on deep litter
Philippe, François-Xavier ULg; Laitat, Martine ULg; Canart, Bernard et al

in Livestock Science (2007), 111(1-2), 144-152

Five successive batches of fattening pigs were raised, each during a four month period, on a totally concrete slatted floor in one experimental room and on straw based deep litter in another. The rooms ... [more ▼]

Five successive batches of fattening pigs were raised, each during a four month period, on a totally concrete slatted floor in one experimental room and on straw based deep litter in another. The rooms were automatically ventilated to maintain a constant ambient temperature. Available floor space was of 0.75 in m(2) per pig kept on the slatted floor and 1.20 m(2) per pig kept on the deep litter. With this last system, about 46 kg of straw were supplied per pig throughout a fattening period. The slurry pit was emptied and the litter removed after each batch. Once a month, the emissions of ammonia (NH3) nitrous oxide (N2O), methane (CH4), carbon dioxide (CO2) and water vapour (H2O) were measured continuously for 6 consecutive days by infra-red. photoacoustic detection. The performance of the animals was not significantly different according to the floor type. Gaseous emissions from pigs raised on the slatted floor and on the deep litter were, respectively, 6.2 and 13.1 g per pig per day for NH3, 0.54 and 1.11 g per pig per day for N2O, 16.3 and 16.0 g per pig per day for CH4, 1.74 and 1.97 kg per pig per day for CO2 and 2.48 and 3.70 kg per pig per day for H2O. Except for the CH4 emissions, all the differences were significant (P<0.001). Thus, pig fattening on deep litter releases nearly 20% more greenhouse gases than on slatted floor, with 2.64 and 2.24 kg of CO2 equivalents, respectively (P<0.001). Whatever the floor type, emissions increased from the beginning to the end of the fattening periods by about 5 times for NH3, 4 times for N2O, 3 times for CH4 and 2 times for CO2 and H2O. Correlation coefficients between CO2-emissions and H2O, NH3 and CH4 emissions were, on average for both floor types, 0.82, 0.77 and 0.74, respectively. Although rearing pigs on straw generally has a good brand image for the consumer, this rearing system produces more pollutant gases than keeping pigs on slatted floors. (c) 2007 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 101 (20 ULg)
Full Text
Peer Reviewed
See detailComparison of an approximated method with FEA calculations for the evaluation of the fire resistance of concrete tunnel sections
Schneider, Ulrich; Schneider, Martin; Franssen, Jean-Marc ULg

in Proceedings of the International Workshop "Fire Design of Concrete Structures - From Materials Modelling to Structural Performance (2007, November)

Detailed reference viewed: 18 (1 ULg)
Peer Reviewed
See detailComparison of antiosteoclastic activity of Estraderm TTS50 and Premarin 0.625 in healthy postmenopausal females
Reginster, Jean-Yves ULg; Dequinze, B; Franchimont, P

in Hungarian Rhumatology (1991), 32

Detailed reference viewed: 10 (3 ULg)
Full Text
Peer Reviewed
See detailComparison of aquifer vulnerability assessment techniques. Application to the Neblon river basin (Belgium)
Gogu, Radu Constantin; Hallet, Vincent; Dassargues, Alain ULg

in Environmental Geology (2003), 44(8), 881-892

Five different methods for assessing intrinsic aquifer vulnerability were tested in a case study and their results compared. The test area was a slightly karstified district in the Condroz region of ... [more ▼]

Five different methods for assessing intrinsic aquifer vulnerability were tested in a case study and their results compared. The test area was a slightly karstified district in the Condroz region of Belgium. The basin covers about 65 km(2) and the karst aquifer provides a water-supply of about 28,000 m(3)d(-1). The methods tested were: EPIK (Doerfliger et al. 1999), DRASTIC (Aller et al.1987), 'German method' (von Hoyer and Sofner 1998), GOD (Foster 1987) and ISIS (Civita and De Regibus 1995). The results are compared and critically examined. From the analysis, it seems that reducing the number of parameters is unsatisfactory, due to the variety of geological conditions. The various methods produce very different results at any given site. As only physically-based methods can be checked for their reliability, it is clear that future vulnerability mapping techniques must incorporate such methods. [less ▲]

Detailed reference viewed: 134 (10 ULg)
See detailComparison of auroral processes at Jupiter and Saturn
Clarke, J.; Gérard, Jean-Claude ULg

Conference (2003, April 01)

Extensive series of images of Jupiter's aurora have been obtained from HST and ground-based telescopes, while only a handful of images of Saturn's aurora have been taken to date and only with the HST ... [more ▼]

Extensive series of images of Jupiter's aurora have been obtained from HST and ground-based telescopes, while only a handful of images of Saturn's aurora have been taken to date and only with the HST. With the Cassini spacecraft approaching Saturn, it is timely to compare what we know of Saturn's aurora with the better-studied case of Jupiter. This presentation will summarize the basic features of Jupiter's auroral processes, give an overview of what we know about Saturn's auroral processes, and speculate on what might be learned from further studies at the time of Cassini approach to Saturn. [less ▲]

Detailed reference viewed: 10 (1 ULg)