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See detailOn-the-go georeferenced measurements of soil mechanical strength and differenciation of soil structure.
Destain, Marie-France ULg; Sirjacobs, Damien ULg; Hanquet, Bernard et al

in Geophysical Research Abstracts (2008)

Soil strength is defined as the resistance which as to be overcome to obtain a given soil deformation. Amongst the numerous methods developed to measure soil strength, two are classically used. On one ... [more ▼]

Soil strength is defined as the resistance which as to be overcome to obtain a given soil deformation. Amongst the numerous methods developed to measure soil strength, two are classically used. On one hand, a laboratory method based on triaxial tests of undisturbed soil samples allows the estimation of cohesion and internal friction angle by the Mohr-Coulomb equation. On the other hand, measuring soil penetration resistance by pushing a cone into a soil is a widely used technique. Both techniques deliver discontinuous field information and are not suited to produce digital soil mapping. The objectives of this paper are to present a sensor able to continuously measure soil strength variations. The sensor was constituted of a thin blade pulled in the soil at a constant depth and speed and a beam which transferred the soil-blade forces to a transducer fixed on a vehicle. The transducer measures the draft force Fx, the vertical force Fz and the moment My thanks to an octagonal ring dynamometer. A measurement chain was developed to acquire simultaneously the signals provides by the soil strength sensor and those of a DGPS. Signal processing was notably based on geostatistics and allows soil mapping [1]. Four fields representative of the soils used in silty areas for arable production in Belgium were selected. The measurements were repeated several times during 1999-2003. Targeted test plots were chosen in each field to perform reference measurements, namely granulometry, cohesion, friction angle, pF, water content, dry bulk density, and cone index. The within-field studies revealed high variability caused by texture, history, traffic, etc., and showed a correlation between the sensor signals and physical parameters, such as cone index and soil moisture, as long as no over-consolidation of the soil occurred [2]. To assess the similarity of soil strength between the fields, the data Fx, Fz and My were classified by using canonical variates (CV). The two first CV represented 95.9 % of the variability, which means that two main variables contain the essential part of the information. In a plane (Fz, Fx), three clusters could be distinguished. The first one (trials 1 and 5), characterized by a low draft and a high Fz, corresponded to trials performed in March on soils ploughed during the winter, naked or covered with small vegetation, and characterized by small values of cone index. The second one (trials 2, 3, 4, 7) with high values of Fx and Fz grouped measurements done just after wheat harvest in August. The third cluster (trials 6) corresponded to measurements performed during wheat growth. It may be concluded that the signals from the sensor treated by suited statistical analysis have the potential to differentiate soil structures at a field scale. REFERENCES [1] Sirjacobs D., Hanquet B., Lebeau F., Destain M.-F. (2002). On-line mechanical resistance mapping and correlation with soil physical properties for precision agriculture. Soil and Tillage Research 64, 231-242. [2] Hanquet B., Sirjacobs D., Destain M.-F., Frankinet M., Verbrugge J.-C. (2004). Analysis of soil variability measured with a soil strength sensor. Precision Agriculture, 5, 227-246. [less ▲]

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See detailOnboard implementation of the GHER model for the Black Sea, with SST and CTD data assimilation
Vandenbulcke, Luc ULg; Capet, Arthur ULg; Beckers, Jean-Marie ULg et al

in Journal of Operational Oceanography (2010), 3(2), 47-54

The first operational implementation of the GHER hydrodynamic model is described. It took place onboard the research vessel Alliance with all computation and sharing of forecasts being realised from the ... [more ▼]

The first operational implementation of the GHER hydrodynamic model is described. It took place onboard the research vessel Alliance with all computation and sharing of forecasts being realised from the vessel in near-real time. The forecasts were realised in the context of the Turkish Straits System 2008 campaign, which aimed at the real-time characterisation of the Marmara Sea and (south-western) Black Sea. The model performed badly at first, mainly because of poor initial conditions. Hence, as the model includes a reduced-rank extended Kalman filter assimilation scheme, after a hindcast where sea surface temperature and temperature and salinity profiles were assimilated, the model yielded realistic forecasts. Furthermore, the time required to run a one-day simulation (about 300 seconds of simulation, or 500 with pre-processing and data transfers included) was very limited and thus operational use of the model is possible. [less ▲]

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See detailonce a day administration of amikacine in neonates: assessment of nephrotoxicity and ototoxicity
Battisti, Oreste ULg; Langhendries, J. P.; Bertrand, J. M. et al

in Developmental Pharmacology and Therapeutics (1993), 20

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See detailOnce daily administration of amikacin. Adaptation to neonatology for infants less than 3 days of postnatal age
Battisti, Oreste ULg

in Médecine et Maladies Infectieuses (1993), 23

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See detailOnce weekly alendronate produces a greater decrease in bone resorption than daily risedronate
Hosking, D.; Adami, S.; Felsenberg, D. et al

in Osteoporosis International (2002), 13(S1), 18

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See detailOnce weekly alendronate produces a greater decrease in bone resorption than daily risedronate
Hosking, D.; Adami, Silvio; Felsenberg, D. et al

in Annals of the Rheumatic Diseases (2002, June), 61(Suppl.1),

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See detailOnce weekly alendronate produces a greater decrease in bone resorption than does daily risedronate
Hosking, D.; Adami, S.; Felsenberg, D. et al

in Journal of Bone and Mineral Research (2002, September), 17(S1), 370

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See detailOnce weekly alendronate produces a greater increase in bone mineral density than daily risedronate
Hosking, D; Adami, S; Felsenberg, D et al

in Calcified Tissue International (2003), 72

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See detailOnce weekly alendronate produces a greater increase in bone mineral density than daily risedronate
Hosking, D.; Adami, S.; Felsenberg, D. et al

in BONE (2003), 32(S7), 207

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See detailOnce-a-day administration of amikacin in neonates: assessment of nephrotoxicity and ototoxicity
Battisti, Oreste ULg; Langhendries, J. P.; Bertrand, J. M. et al

in Developmental Pharmacology and Therapeutics (1992), 20

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See detailOnce-a-day administration of amikacin in neonates: clinical evidence of the validity of a pharmacokinetic according to the gestational age
Battisti, Oreste ULg; Wallemacq P; Langhendries JP

in Early Human Development (1994), 38

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See detailthe once-daily concept of aminoglycoside administration adapted in neonatalogy
Battisti, Oreste ULg

in Pediatric Research (1998), 2

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See detailOnce-monthly and daily oral ibandronate are at least as effective in improving proximal femur BMD in postmenopausal osteoporosis: 12-month data from MOBILE
Reginster, Jean-Yves ULg; Lorenc, R.; Stepan, J. J. et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 93

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See detailOnce-monthly dosing of oral ibandronate is highly efficacious: 2-year results from mobile
Reginster, Jean-Yves ULg; Stakkestad, J. A.; Lorenc, R. et al

in Osteoporosis International (2006, March), 17(Suppl.1), 64-65

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See detailOnce-monthly oral ibandronate (Boniva) dosing is highly efficacious in postmenopausal osteoporosis: 2-year results from MOBILE
Silverman, Stuart; Greenwald, M.; Hawker, G. et al

in Arthritis and Rheumatism (2005, September), 52(number 9 (suppl.)), 735-736

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See detailOnce-monthly oral ibandronate a new bisphosphonate dosing concept
Reginster, Jean-Yves ULg; Miller, P.; Delmas, P. et al

in Calcified Tissue International (2004), 74(S1), 85

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See detailOnce-monthly oral ibandronate compared with weekly oral alendronate in postmenopausal osteoporosis: results from the head-to-head MOTION study.
Miller, Paul D; Epstein, Sol; Sedarati, Farhad et al

in Current Medical Research & Opinion (2008), 24(1), 207-13

OBJECTIVE: Oral ibandronate 150 mg is the first bisphosphonate approved for once-monthly treatment of postmenopausal osteoporosis. To investigate whether once-monthly ibandronate 150 mg increases lumbar ... [more ▼]

OBJECTIVE: Oral ibandronate 150 mg is the first bisphosphonate approved for once-monthly treatment of postmenopausal osteoporosis. To investigate whether once-monthly ibandronate 150 mg increases lumbar spine and total hip bone mineral density (BMD) to the same degree as weekly alendronate 70 mg. RESEARCH DESIGN AND METHODS: This was a 12-month, randomised, multinational, multicentre, double-blind, double-dummy, parallel-group, non-inferiority trial, conducted in 65 centres in North America, Latin America, Europe and South Africa. The study included postmenopausal women, mean lumbar spine (L2-L4) BMD T-score < -2.5 and > or = -5.0. Patients received either ibandronate 150 mg once monthly or alendronate 70 mg once weekly. MAIN OUTCOME MEASURES: Co-primary efficacy endpoints were 12-month change (%) from baseline in mean lumbar spine and total hip BMD. Changes (%) from baseline in trochanter and femoral neck BMD were also evaluated. Adverse events were monitored throughout. Once-monthly ibandronate was considered non-inferior to weekly alendronate if the lower boundary of the one-sided 97.5% confidence interval (CI) (or two-sided 95% CI) was > or = -1.41% for lumbar spine and > or = -0.87% for total hip. RESULTS: Mean relative 12-month changes were 5.1% and 5.8% (95% CI for difference, -1.13, -0.23) in lumbar spine and 2.9% and 3.0% (95% CI for difference, -0.38, 0.18) in total hip BMD with once-monthly ibandronate and weekly alendronate, respectively; meeting the non-inferiority criteria at both sites. Gains in trochanter and femoral neck BMD were similar with both treatments. Both regimens were well tolerated. TRIAL REGISTRATION: The MOTION study is registered with the International Federation of Pharmaceutical Manufacturers and Associations trial portal, under the ID number MM17385. CONCLUSIONS: Once-monthly ibandronate was shown to be clinically comparable to weekly alendronate at increasing BMD after 12 months in both the lumbar spine and total hip. [less ▲]

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See detailOnce-weekly alendronate produces a greater decrease in bone resorption than daily risedronate
Adami, Silvio; Felsenberg, D.; Hosking, D. et al

in Osteoporosis International (2002, November), 13(Suppl.3), 14-15

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