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See detailAnnual Efficiency of Separated Systems for Heating and Domestic Hot Water Needs in dwellings
Hauglustaine, Jean-Marie ULiege

Conference (1982, March)

Any designer (architect, consulting engineer...), who must choose the technical solution of a heating installation in a house, is always confronted with the same alternatives: combined production of both ... [more ▼]

Any designer (architect, consulting engineer...), who must choose the technical solution of a heating installation in a house, is always confronted with the same alternatives: combined production of both hot water for heating needs and domestic hot water, assured by a combined boiler or a boiler producing only heating hot water and a separate water heater (instantaneous or with storage) for domestic hot water needs. The objective of this present study is to give the designer simple graphs which become an easy way to assume, with a good accuracy, the “global annual efficiency” of each solution, and allow a sensitivity study of efficiency to main parameters of each system. [less ▲]

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See detailAnnual Greenland accumulation rates (2009–2012) from airborne snow radar
Koenig, L.; Ivanoff, A.; Alexander, P. et al

in Cryosphere (The) (2016), 10

Contemporary climate warming over the Arctic is accelerating mass loss from the Greenland Ice Sheet through increasing surface melt, emphasizing the need to closely monitor its surface mass balance in ... [more ▼]

Contemporary climate warming over the Arctic is accelerating mass loss from the Greenland Ice Sheet through increasing surface melt, emphasizing the need to closely monitor its surface mass balance in order to improve sea-level rise predictions. Snow accumulation is the largest component of the ice sheet's surface mass balance, but in situ observations thereof are inherently sparse and models are difficult to evaluate at large scales. Here, we quantify recent Greenland accumulation rates using ultra-wideband (2–6.5 GHz) airborne snow radar data collected as part of NASA's Operation IceBridge between 2009 and 2012. We use a semiautomated method to trace the observed radiostratigraphy and then derive annual net accumulation rates for 2009–2012. The uncertainty in these radar-derived accumulation rates is on average 14 %. A comparison of the radar-derived accumulation rates and contemporaneous ice cores shows that snow radar captures both the annual and long-term mean accumulation rate accurately. A comparison with outputs from a regional climate model (MAR) shows that this model matches radar-derived accumulation rates in the ice sheet interior but produces higher values over southeastern Greenland. Our results demonstrate that snow radar can efficiently and accurately map patterns of snow accumulation across an ice sheet and that it is valuable for evaluating the accuracy of surface mass balance models. [less ▲]

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See detailAnnual Meeteing of Association of Dentistry of San Luis Potosí, San Luis Potosí, S.L.P, México
Ortiz Magdaleno, Marine ULiege

Scientific conference (2011, October 15)

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See detailAnnual Meeteing of Association of Dentistry of San Luis Potosí, San Luis Potosí, S.L.P, México
Ortiz Magdaleno, Marine ULiege

Scientific conference (2010, October 09)

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See detailAnnual Meeting of Association of Dentistry of San Luis Potosí, San Luis Potosí, S.L.P, México
Ortiz Magdaleno, Marine ULiege

Scientific conference (2013, October 05)

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See detailAnnual meeting of the SBN/BVN
BOUQUEGNEAU, Antoine ULiege; DELANAYE, Pierre ULiege; CAVALIER, Etienne ULiege et al

Conference (2013)

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See detailAnnual net ecosystem carbon exchange by a sugar beet crop
Moureaux, Christine ULiege; Debacq, Alain ULiege; Bodson, Bernard ULiege et al

in Agricultural and Forest Meteorology (2006), 139(1-2), 25-39

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See detailAnnual nitrogen budget of the seagrass Posidonia oceanica as determined by in situ uptake experiments
Lepoint, Gilles ULiege; Millet, S.; Dauby, Patrick ULiege et al

in Marine Ecology. Progress Series (2002), 237

The uptake of nitrate and ammonium by the roots and leaves of Posidonia oceanica were determined between February 1993 and June 1999 by in situ experiments using the isotope 15 of nitrogen (N-15) as a ... [more ▼]

The uptake of nitrate and ammonium by the roots and leaves of Posidonia oceanica were determined between February 1993 and June 1999 by in situ experiments using the isotope 15 of nitrogen (N-15) as a tracer in a nutrient-poor coastal zone of the NW Mediterranean Sea (Revellata Bay, Corsica). Nitrate and ammonium leaf uptakes are recorded at 0.05 and 0.1 muM respectively. The high variability observed cannot be explained solely by the variation of the substrate concentrations in the water column. For leaves, mean specific uptake rates were 43 +/- 45 and 43 +/- 64 mug N g N-1 h(-1). Nitrate and ammonium leaf uptake fluxes (g N m(-2) yr(-1)) seem to have the same importance on an annual basis. :Nitrate uptake occurs mainly in winter and early spring, when nitrate concentrations in the water column are highest. The uptake of N, and mainly of ammonium, is significant throughout the year with maxima at the beginning of spring, but it is insufficient to meet the annual N requirement of the plant. Posidonia root biomass was very high and corresponded to high specific N uptake rates by the roots. Ammonium was incorporated by the roots 6 times faster than nitrate. In the sediment, this uptake capacity is limited by the nutrient diffusion rate, and the root uptake is therefore insufficient to meet the N requirements of the plant. In fact, P. oceanica of Revellata Bay have a complex N budget involving uptake and recycling processes and allowing the plants to meet their N requirements in one of the most nutrient-poor areas of the NW Mediterranean Sea. We calculated that leaf and root would contribute to 40 and 60% of the annual N uptake, respectively, and 60% of the annual N requirement of the plant. [less ▲]

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See detailAnnual report 2009 of the IGCP-580 Project.
Da Silva, Anne-Christine ULiege; Whalen, Michael; Hladil, Jindrich et al

Report (2009)

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See detailAnnual report 2010 of the IGCP-580 Project.
Da Silva, Anne-Christine ULiege; Whalen, Michael; Hladil, Jindrich et al

Report (2010)

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See detailANNUAL SCIENTIFIC REPORT - Climate change and Antarctic microbial biodiversity (CCAMBIO)
Tytgat, Bjorn; Willems, Anne; Sweetlove, Maxime et al

Report (2015)

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See detailANNUAL SCIENTIFIC REPORT PHASE II "Impact of Phenology and Environmental Conditions on BVOC Emissions from Forest Ecosystems" "IMPECVOC"
Dewulf, Jo; Joó, Eva; Steppe, Kathy et al

Report (2009)

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See detailAnnual variation in neustonic micro- and meso-plastic particles and zooplankton in the Bay of Calvi (Mediterranean–Corsica)
Collignon, Amandine ULiege; Hecq, Jean-Henri ULiege; Galgani, François et al

in Marine Pollution Bulletin (2014), 79(1-2), 293-298

The annual variation in neustonic plastic particles and zooplankton was studied in the Bay of Calvi 23 (Corsica) between 30 August 2011 and 7 August 2012. Plastic particles were classified into three size ... [more ▼]

The annual variation in neustonic plastic particles and zooplankton was studied in the Bay of Calvi 23 (Corsica) between 30 August 2011 and 7 August 2012. Plastic particles were classified into three size classes, small microplastics (0.2–2 mm), large microplastics (2–5 mm) and mesoplastics (5–10 mm). 74% of the 38 samples contained plastic particles of varying composition: e.g. filaments, polystyrene, thin plastic films. An average concentration of 6.2 particles/100 m2 was observed. The highest abundance values (69 particles/100 m2) observed occurred during periods of low offshore wind conditions. These values rose in the same order of magnitude as in previous studies in the North Western Mediterranean. The relationships between the abundance values of the size classes between zooplankton and plastic particles were then examined. The ratio for the intermediate size class (2–5 mm) reached 2.73. This would suggest a potential confusion for predators regarding planktonic prey of this size class. [less ▲]

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See detailAnnual variation in reproductive behavior, testosterone, and plasma FSH levels in the Rouen duck, Anas platyrhynchos.
Balthazart, Jacques ULiege; Hendrick, J.

in General and Comparative Endocrinology (1976), 28(2), 171-83

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See detailAnnual variation in the concentrations of circulating hormones in capercaillie (Tetrao urogallus).
Hissa, R.; Saarela, S.; Balthazart, Jacques ULiege et al

in General and Comparative Endocrinology (1983), 51(2), 183-90

Seasonal variation in the levels of immunoreactive lutropin (LH), follitropin (FSH), prolactin (PRL), corticosterone (B), thyroxine (T4), and triiodothyronine (T3) was measured in the plasma of male and ... [more ▼]

Seasonal variation in the levels of immunoreactive lutropin (LH), follitropin (FSH), prolactin (PRL), corticosterone (B), thyroxine (T4), and triiodothyronine (T3) was measured in the plasma of male and female capercaillies (Tetrao urogallus, Galliformes) in captivity (latitude N 67 degrees). In male capercaillies there was an increase in the concentrations of LH and FSH beginning in March and reaching their maxima in May, which correlated with the nesting period. The concentration of plasma PRL increased from the end of April and reached its highest level simultaneously with the rapid fall of plasma LH and FSH concentrations. It remained elevated until August, Plasma T4 level was depressed after levels of plasma FSH and LH had reached their maxima and was correlated to simultaneous elevation of plasma PRL level. No dramatic seasonal changes in plasma T3 level were noted. In the female capercaillie no marked changes in plasma FSH and LH concentrations were observed. Although four of six females laid eggs only one of them managed to terminate its nesting successfully; five eggs hatched. Changes in prolactin concentration in females parallel those in males. No marked variations were observed in plasma corticosterone concentrations. On the basis of these results it seems probable that captive female capercaillie show depressed gonadotrophin secretion, resulting in unsuccessful nesting. On the other hand it has to be emphasized that gonadotrophin assays may not be sensitive enough, especially in the female, to measure LH and FSH in the volumes of plasma put in the assays. [less ▲]

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