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See detailLong-term bedload mobility in gravel-bed rivers using iron slag as a tracer
Houbrechts, Geoffrey ULg; Levecq, Yannick ULg; Vanderheyden, Vincent ULg et al

in Geomorphology (2011), 126

Bedload dispersion is evaluated in gravel-bed rivers using slag elements from ironworks established along rivers in the Ardenne region, between the fourteenth and the nineteenth centuries. Large ... [more ▼]

Bedload dispersion is evaluated in gravel-bed rivers using slag elements from ironworks established along rivers in the Ardenne region, between the fourteenth and the nineteenth centuries. Large quantities of slag were dumped close to these rivers or even directly into the channels. For centuries, slag elements were dispersed in the bedload and transported by floods of varying importance. Consequently, slag may be considered as a reliable tracer to analyze bedload dispersion over several centuries. The size of slag elements was studied along 16 Ardenne rivers. The longitudinal size trend of the largest slag particles allows the effective competence of these rivers to be determined (between 19 and 129 mm for rivers where specific stream power for the bankfull discharge ranges between 20 and 134 W/m²). A direct relationship doesn’t exist between these two parameters as the size of slag elements must be considered with regard to the D50 of the bed. Selective transport was analyzed directly downstream of the input sites. The sorting distance varies from river to river and depends on the velocity of the coarse elements introduced into the river since the inception of the iron industry. Downstream of two metallurgic sites, the slag propagation fronts were located. As the periods of activity at these sites are known from historical studies, the virtual velocity of bedload movement in these rivers was estimated to be 2-4 km/century. [less ▲]

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See detailLong-term behavior and quality of life after corrective cardiac surgery in infancy for tetralogy of Fallot or ventricular septal defect.
Hovels-Gurich, H. H.; Konrad, K.; Skorzenski, D. et al

in Pediatric Cardiology (2007), 28(5), 346-354

The objective of this study was to evaluate behavior and quality of life in children after corrective cardiac surgery in infancy. Twenty cyanotic (tetralogy of Fallot) and 20 acyanotic children ... [more ▼]

The objective of this study was to evaluate behavior and quality of life in children after corrective cardiac surgery in infancy. Twenty cyanotic (tetralogy of Fallot) and 20 acyanotic children (ventricular septal defect), operated at a mean age of 0.7 years with deep hypothermic circulatory arrest (DHCA) and low-flow cardiopulmonary bypass (CPB), were assessed at a mean age of 7.4 years by the Child Behavior Checklist (CBCL) and the German KINDL. Test results were related to perioperative and neurodevelopmental outcome. Compared to healthy children and not significantly different between the groups, internalizing and externalizing problems were elevated, school performance and total competence were reduced, and self- and parent-reported quality of life was not reduced. Parent-reported problems and reduced physical status were correlated with longer durations of DHCA and CPB. Internalizing and externalizing problems, reduced school competence, and reduced self-esteem were associated with reduced endurance capacity. Externalizing problems were related to reduced gross motor function. Poor school competence was related to reduced intelligence and academic achievement. Children with preoperative hypoxemia in infancy due to cyanotic cardiac defects are not at significantly higher risk for behavioral problems and reduced quality of life than those with acyanotic heart defects. The risk of long-term psychosocial maladjustment after corrective surgery in infancy is increased compared to that for normal children and related to the presence of neurodevelopmental dysfunction. [less ▲]

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See detailLong-term biogeochemical effects of adding alkalinity into the ocean
Ilyina, Tatiana; Wolf-Gladrow, Dieter; Munhoven, Guy ULg et al

Conference (2011, June 20)

Large-scale perturbations in seawater chemistry brought about by the oceanic uptake of anthropogenic CO2 will go on long after emissions decline or stop. Several geo-engineering approaches have been ... [more ▼]

Large-scale perturbations in seawater chemistry brought about by the oceanic uptake of anthropogenic CO2 will go on long after emissions decline or stop. Several geo-engineering approaches have been suggested to reduce atmospheric CO2 concentrations and ocean acidification. One of them is to enhance weathering processes to remove atmospheric CO2. This method involves dissolving rocks (i.e. limestone, olivine) or adding strong bases (i.e. calcium hydroxide) to the upper ocean. The net effect of these two approaches is to increase ocean alkalinity, thereby increasing the oceanic capacity to take up and store anthropogenic CO2. Another effect of adding alkalinity would be to drive seawater to higher pH values and thus counteract the ongoing ocean acidification. However, whereas adding bases initially only alters alkalinity of seawater, dissolution of carbonates perturbs both, alkalinity and dissolved inorganic carbon budgets. Thus, on longer time scales, these two methods will likely have different biogeochemical effects in the ocean. Here we test enduring implications of the two approaches for the marine carbon cycle using the global ocean biogeochemical model HAMOCC which also includes marine sediments. In our model scenarios we add alkalinity in amounts proportional to fossil fuel emissions. We compare the long-term effectiveness of the two geo-engineering approaches to decrease atmospheric CO2. [less ▲]

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See detailLong-term biogeochemical impacts of liming the ocean
Ilyina, Tatiana; Wolf-Gladrow, Dieter; Munhoven, Guy ULg et al

Conference (2011, December 08)

Fossil fuel CO2 emissions result in large-scale long-term perturbations in seawater chemistry. Oceans take up atmospheric CO2, and several geo-engineering approaches have been suggested to mitigate ... [more ▼]

Fossil fuel CO2 emissions result in large-scale long-term perturbations in seawater chemistry. Oceans take up atmospheric CO2, and several geo-engineering approaches have been suggested to mitigate impacts of CO2 emissions and resulting ocean acidification that are based on this property. One of them is to enhance weathering processes to remove atmospheric CO2. This method involves dissolving rocks (i.e. limestone) or adding strong bases (i.e. calcium hydroxide) in the upper ocean and is termed as liming the oceans. The net effect of this approach is to increase ocean alkalinity, thereby increasing the oceanic capacity to store anthropogenic CO2. Another effect of adding alkalinity would be to drive seawater to higher pH values and thus counteract the ongoing ocean acidification. However, whereas adding bases only alter alkalinity of seawater, dissolution of carbonates perturb both, alkalinity and dissolved inorganic carbon budgets. Thus, on longer time scales, these two methods will likely have different biogeochemical effects in the ocean. Here we test enduring implications of the two approaches for marine carbon cycle using the global ocean biogeochemical model HAMOCC. In our model scenarios we add alkalinity in the amounts proportional to fossil fuel emissions. We compare the longterm effectiveness of the two geo-engineering approaches to decrease atmospheric CO2. [less ▲]

Detailed reference viewed: 176 (6 ULg)
See detailLong-term Brightness Variations of the Io UV Footprint
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg et al

Conference (2008, December 01)

Since the finding of the UV Io footprint in 1996, the successive UV instruments on board the Hubble Space Telescope (HST) allowed us to considerably improve the understanding of the Io-Jupiter electro ... [more ▼]

Since the finding of the UV Io footprint in 1996, the successive UV instruments on board the Hubble Space Telescope (HST) allowed us to considerably improve the understanding of the Io-Jupiter electro-magnetic interaction and its auroral counterpart. It has been shown that the Io footprint is generally formed by one bright spot preceded or followed by secondary spots whose relative positions are linked to the location of Io in the plasma torus. We also know that these spots experience brightness variations from minutes to hours. The Io footprint brightness varies over hours with the longitude of Io in the Jovian magnetic field (System III longitude) but until recently, huge gaps existed in the longitude coverage. Part of these gaps has now been filled during the latest HST imaging campaign and a more complete spot brightness versus Io System III longitude diagram emerges. Additionally, we compare spot brightness between images obtained a few minutes apart but from opposite hemispheres. Based on images gathered from 1997 to 2007 with the STIS and the ACS cameras, we also show that the footprint morphology and the spots brightness, including their relative brightness, can vary significantly from one year to another. Finally, we discuss the brightness variations from hours to years in terms of plasma torus density and position of Io in the plasma torus as well as in Jovian magnetic field. [less ▲]

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See detailLong-Term Care and Myopic Couples
Klimaviciute, Justina ULg

Conference (2015)

Detailed reference viewed: 24 (6 ULg)
See detailLong-Term Care and Myopic Couples
Klimaviciute, Justina ULg

Conference (2015)

Detailed reference viewed: 30 (10 ULg)
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See detailLong-Term Care Insurance and Family
Pestieau, Pierre ULg; Canta, Chiara

in B.E. Journal of Economic Analysis & Policy (2014)

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See detailLong-Term Care Insurance and Family Norms
Pestieau, Pierre ULg; Canta, Chiara

in The B.E. Journal of Economic Analysis & Policy (2013), 14(1), 1-28

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See detailLong-Term Care Insurance and Intra-family Moral Hazard: Fixed vs Proportional Insurance Benefits
Klimaviciute, Justina ULg

in GENEVA Risk & Insurance Review (2017)

Pauly (1990) argues that an explanation for the low long-term care (LTC) insurance demand could be intra-family moral hazard: parents might refuse to buy insurance since it reduces children’s incentives ... [more ▼]

Pauly (1990) argues that an explanation for the low long-term care (LTC) insurance demand could be intra-family moral hazard: parents might refuse to buy insurance since it reduces children’s incentives to provide care. This paper raises and explores the idea that the extent of intra-family moral hazard and non-purchase of LTC insurance might differ when insurance benefits are fixed and when they are proportional to LTC expenditures. It shows that fixed benefits limit and might even eliminate intra-family moral hazard, while the effect of proportional benefits is at best ambiguous. Consequently, non-purchase of insurance is less likely with fixed benefits. [less ▲]

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See detailLong-term care insurance and optimal taxation for altruistic children
Jousten, Alain ULg; Lipszyc, B.; Marchand, Maurice et al

in Finanzarchiv (2005), 61(1), 1-18

We model long-term care insurance in an optimal taxation framework. Every adult decides upon the amount and type of care he purchases for his dependent parent. We consider two alternatives: nursing-home ... [more ▼]

We model long-term care insurance in an optimal taxation framework. Every adult decides upon the amount and type of care he purchases for his dependent parent. We consider two alternatives: nursing-home care provided by the government, and home care paid by the child with some lump-sum subsidy by the government. The only source of information asymmetry is the government's inability to observe the degree of altruism of the adult child for his/her parent. Further tax collection entails some social costs. In such a second-best setting, we show that the quality of institutional care has to be kept relatively low and that compared to altruistic children, nonaltruistic ones enjoy a high level of consumption. [less ▲]

Detailed reference viewed: 53 (4 ULg)
See detailLong-term care social insurance. How to avoid big losses?
Klimaviciute, Justina ULg; Pestieau, Pierre ULg

Scientific conference (2015)

Detailed reference viewed: 47 (15 ULg)
See detailLong-term care social insurance. How to avoid big losses?
Klimaviciute, Justina ULg; Pestieau, Pierre ULg

Scientific conference (2016, November 10)

Detailed reference viewed: 16 (1 ULg)
See detailLong-term care social insurance. How to avoid big losses?
Klimaviciute, Justina ULg; Pestieau, Pierre ULg

Scientific conference (2016, November 15)

Detailed reference viewed: 23 (1 ULg)
See detailLong-term care social insurance. How to avoid big losses?
Klimaviciute, Justina ULg; Pestieau, Pierre ULg

Conference (2016, June 13)

Detailed reference viewed: 21 (3 ULg)
See detailLong-term care social insurance. How to avoid big losses?
Klimaviciute, Justina ULg; Pestieau, Pierre ULg

Scientific conference (2017, February 10)

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See detailLong-term care social insurance. How to avoid big losses?
Klimaviciute, Justina ULg; Pestieau, Pierre ULg

E-print/Working paper (2016)

Long-term care (LTC) needs are expected to rapidly increase in the next decades and at the same time the main provider of LTC, namely the family is stalling. This calls for more involvement of the state ... [more ▼]

Long-term care (LTC) needs are expected to rapidly increase in the next decades and at the same time the main provider of LTC, namely the family is stalling. This calls for more involvement of the state that today covers less than 20% of these needs and most often in an inconsistent way. Besides the need to help the poor dependent, there is a mounting concern in the middlec lass that a number of dependent people are incurring costs that could force them to sell all their assets. In this paper we study the design of a social insurance that meets this concern. Following Arrow (1963), we suggest a policy that is characterized by complete insurance above a deductible amount. [less ▲]

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See detailLong-Term Care: the State, the Market and the Family
Motohiro, Sato; Pestieau, Pierre ULg

in Economica (2008), (75), 435-454

In this paper we study the optimal design of a long term care policy in a setting that includes three types of care to dependent parents: public nursing, private nursing and assistance in time by children ... [more ▼]

In this paper we study the optimal design of a long term care policy in a setting that includes three types of care to dependent parents: public nursing, private nursing and assistance in time by children. Private nursing can be financed either by financial aid from children or by private insurance. The social planner can use a number of instruments: public nursing, subsidy to aiding children, subsidy to private insurance premiums, all financed by a flat tax on earnings. [less ▲]

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See detailLong-term climate commitments projected with climate-carbon cycle models
Plattner, G. K.; Knutti, R.; Joos, F. et al

in Journal of Climate (2008), 21(12), 2721-2751

Eight earth system models of intermediate complexity (EMICs) are used to project climate change commitments for the recent Intergovernmental Panel on Climate Change's (IPCC's) Fourth Assessment Report ... [more ▼]

Eight earth system models of intermediate complexity (EMICs) are used to project climate change commitments for the recent Intergovernmental Panel on Climate Change's (IPCC's) Fourth Assessment Report (AR4). Simulations are run until the year 3000 A. D. and extend substantially farther into the future than conceptually similar simulations with atmosphere-ocean general circulation models (AOGCMs) coupled to carbon cycle models. In this paper the following are investigated: 1) the climate change commitment in response to stabilized greenhouse gases and stabilized total radiative forcing, 2) the climate change commitment in response to earlier CO2 emissions, and 3) emission trajectories for profiles leading to the stabilization of atmospheric CO2 and their uncertainties due to carbon cycle processes. Results over the twenty-first century compare reasonably well with results from AOGCMs, and the suite of EMICs proves well suited to complement more complex models. Substantial climate change commitments for sea level rise and global mean surface temperature increase after a stabilization of atmospheric greenhouse gases and radiative forcing in the year 2100 are identified. The additional warming by the year 3000 is 0.6-1.6 K for the low-CO2 IPCC Special Report on Emissions Scenarios (SRES) B1 scenario and 1.3-2.2 K for the high-CO2 SRES A2 scenario. Correspondingly, the post-2100 thermal expansion commitment is 0.3-1.1 m for SRES B1 and 0.5-2.2 m for SRES A2. Sea level continues to rise due to thermal expansion for several centuries after CO2 stabilization. In contrast, surface temperature changes slow down after a century. The meridional overturning circulation is weakened in all EMICs, but recovers to nearly initial values in all but one of the models after centuries for the scenarios considered. Emissions during the twenty-first century continue to impact atmospheric CO2 and climate even at year 3000. All models find that most of the anthropogenic carbon emissions are eventually taken up by the ocean (49%-62%) in year 3000, and that a substantial fraction (15%-28%) is still airborne even 900 yr after carbon emissions have ceased. Future stabilization of atmospheric CO2 and climate change requires a substantial reduction of CO2 emissions below present levels in all EMICs. This reduction needs to be substantially larger if carbon cycle-climate feedbacks are accounted for or if terrestrial CO2 fertilization is not operating. Large differences among EMICs are identified in both the response to increasing atmospheric CO2 and the response to climate change. This highlights the need for improved representations of carbon cycle processes in these models apart from the sensitivity to climate change. Sensitivity simulations with one single EMIC indicate that both carbon cycle and climate sensitivity related uncertainties on projected allowable emissions are substantial. [less ▲]

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See detailLong-term cold therapy to treat knee osteoarthritis: proof-of-concept.
Henrotin, Yves ULg

in Hospital Health Care (2009)

Detailed reference viewed: 23 (1 ULg)