Is it worth protecting groundwater from diffuse pollution with agri-environmental schemes? A hydro-economic modeling approach
; Orban, Philippe ; Brouyère, Serge
in Journal of Environmental Management (2013), 128
In Europe, 30% of groundwater bodies are considered to be at risk of not achieving the Water Framework Directive (WFD) ‘good status’ objective by 2015, and 45% are in doubt of doing so. Diffuse ... [more ▼]
In Europe, 30% of groundwater bodies are considered to be at risk of not achieving the Water Framework Directive (WFD) ‘good status’ objective by 2015, and 45% are in doubt of doing so. Diffuse agricultural pollution is one of the main pressures affecting groundwater bodies. To tackle this problem, the WFD requires Member States to design and implement cost-effective programs of measures to achieve the ‘good status’ objective by 2027 at the latest. Hitherto, action plans have mainly consisted of promoting the adoption of Agri- Environmental Schemes (AES). This raises a number of questions concerning the effectiveness of such schemes for improving groundwater status, and the economic implications of their implementation. We propose a hydro-economic model that combines a hydrogeological model to simulate groundwater quality evolution with agronomic and economic components to assess the expected costs, effectiveness, and benefits of AES implementation. This hydro-economic model can be used to identify cost-effective AES combinations at groundwater-body scale and to show the benefits to be expected from the resulting improvement in groundwater quality. The model is applied here to a rural area encompassing the Hesbaye aquifer, a large chalk aquifer which supplies about 230,000 inhabitants in the city of Liege (Belgium) and is severely contaminated by agricultural nitrates. We show that the time frame within which improvements in the Hesbaye groundwater quality can be expected may be much longer than that required by the WFD. Current WFD programs based on AES may be inappropriate for achieving the ‘good status’ objective in the most productive agricultural areas, in particular because these schemes are insufficiently attractive. Achieving ‘good status’ by 2027 would demand a substantial change in the design of AES, involving costs that may not be offset by benefits in the case of chalk aquifers with long renewal times. [less ▲]Detailed reference viewed: 39 (14 ULg)
Is laparoscopy still the gold standard in infertility assessment? A comparison of fertiloscopy versus laparoscopy in infertility. Results of an international multicentre prospective trial: the 'FLY' (Fertiloscopy-LaparoscopY) study.
; NISOLLE, Michelle ; et al
in Human Reproduction (2003), 18(4), 834-9
BACKGROUND: The aim of this prospective multicentre study was to compare the two endoscopic techniques of laparoscopy and fertiloscopy in routine evaluation of the pelvis in infertile women. METHODS: A ... [more ▼]
BACKGROUND: The aim of this prospective multicentre study was to compare the two endoscopic techniques of laparoscopy and fertiloscopy in routine evaluation of the pelvis in infertile women. METHODS: A total of 92 women was selected in 14 University Hospitals to undergo fertiloscopy followed by transabdominal laparoscopy by a team of two surgeons in each hospital. RESULTS: A high degree of concordance was observed between these two techniques, in that if fertiloscopy did not detect any abnormalities, this was also confirmed by laparoscopy. Discordance was observed in similar numbers of cases: eight after laparoscopy and nine after fertiloscopy. The diagnostic index for fertiloscopy and laparoscopy was calculated; sensitivity (86 and 87% respectively) and negative predictive value (64 and 67% respectively) were similar. The kappa index was also calculated for each of the six structures/regions (right/left tube; right/left ovary; peritoneum of pouch of Douglas; posterior uterus), and concordance (0.78 to 0.91) was considered almost complete. CONCLUSIONS: These results confirm fertiloscopy as a minimally invasive safe procedure that may be considered as an alternative to diagnostic laparoscopy in the routine assessment of women without clinical or ultrasound evidence of pelvic disease. On the basis of the additional advantages of fertiloscopy, namely salpingoscopy or microsalpingoscopy, it is considered that fertiloscopy could replace laparoscopy as a routine procedure in such women. [less ▲]Detailed reference viewed: 42 (2 ULg)
Is left ventricular longitudinal function related to metabolic abnormalities and fat distribution?
; Magne, Julien ; et al
Conference (2010)Detailed reference viewed: 6 (0 ULg)
Is Leopoldamys neilli (Rodentia, Muridae) a synonym of Leopoldamys herberti? A reply to Balakirev et al. (2013)
Latinne, Alice ; ; et al
in Zootaxa (2013), 3731(4), 589-598
Recently, Balakirev et al. (2013) presented a taxonomic revision of the genus Leopoldamys based on phylogenetic analyses. They identified five main Leopoldamys genetic lineages and suggested to rename ... [more ▼]
Recently, Balakirev et al. (2013) presented a taxonomic revision of the genus Leopoldamys based on phylogenetic analyses. They identified five main Leopoldamys genetic lineages and suggested to rename several of them. According to these authors, the genetic lineage previously thought to belong to L. edwardsi (lineage L1) should be assigned to L. revertens while L. neilli (lineage L2) should be considered as a junior synonym of L. herberti. Using molecular and morphological data from a large sampling of Leopoldamys specimens, the aim of the present study was to investigate the taxonomic status of L. herberti and L. neilli. This study reveals that, contrary to Balakirev et al.’s statement, both genetic lineages L1 and L2 occur in Nakhon Ratchasima Province, close to the type locality of L. herberti. We also show that the external measurements and color pattern of L. herberti are highly similar to those of L1 specimens but are not consistent with the morphology of L2 specimens. Therefore these results strongly suggest that L. herberti should be assigned to the genetic lineage L1. Consequently L. neilli should not be considered as a junior synonym of L. herberti and this study confirms that the appropriate name of the genetic lineage L2 is L. neilli. Moreover, as our results show that L. herberti should be assigned to the lineage L1, this name has nomenclatural priority over L. revertens, the species name suggested by Balakirev et al. (2013) for this lineage. [less ▲]Detailed reference viewed: 36 (4 ULg)
Is mathematical history written by the victors ?
Bair, Jacques ; Henry, Valérie ; et al
in Notices of the American Mathematical Society (2013), 60(7), 886-904
We examine prevailing philosophical and historical views about the origin of infinitesimal mathematics in light of modern infinitesimal theories, and show the works of Fermat, Leibniz, Euler, Cauchy and ... [more ▼]
We examine prevailing philosophical and historical views about the origin of infinitesimal mathematics in light of modern infinitesimal theories, and show the works of Fermat, Leibniz, Euler, Cauchy and other giants of infinitesimal mathematics in a new light. Some topics from the history of infinitesimals illustrating our approach appear in alphabetical order. [less ▲]Detailed reference viewed: 48 (8 ULg)
Is migration a good substitute for education subsidies?
; ; Pestieau, Pierre
in Journal of Development Economics (2008), (86), 263-276
Assuming a given educational policy, the recent brain drain literature reveals that skilled migration can boost the average level <br />of schooling in developing countries. In this paper, we introduce ... [more ▼]
Assuming a given educational policy, the recent brain drain literature reveals that skilled migration can boost the average level <br />of schooling in developing countries. In this paper, we introduce educational subsidies determined by governments concerned by <br />the number of skilled workers remaining in the country. Our theoretical analysis shows that developing countries can benefit from <br />skilled emigration when educational subsidies entail high fiscal distortions. However when taxes are not too distortionary, it is <br />desirable to impede emigration and subsidize education. We then investigate the empirical relationship between educational <br />subsidies and migration prospects, obtaining a negative relationship for 105 countries. Based on this result, we revisit the country <br />specific effects of skilled migration upon human capital. We show that the endogeneity of public subsidies reduces the number of <br />winners and increases the magnitude of the losses. <br />© 2008 Elsevier B.V. All rights reserved. [less ▲]Detailed reference viewed: 24 (4 ULg)
Is motor sequence learning impaired in Developmental Coordination Disorder?
Lejeune, Caroline ; Catale, Corinne ; Schmitz, Xavier et al
Developmental Coordination Disorder (DCD) is a developmental disorder characterized by marked impairments in motor skills. Despite its negative impact on daily activities and on cognitive and academic ... [more ▼]
Developmental Coordination Disorder (DCD) is a developmental disorder characterized by marked impairments in motor skills. Despite its negative impact on daily activities and on cognitive and academic performance, the mechanisms underlying this disorder remain largely unknown. One hypothesis that has been proposed is that the poor motor coordination abilities may be attributed to impairments in motor learning and, more specifically, in learning of the correct sequencing of movements (Gheysen et al., 2011). To date, only two studies have directly investigated sequence learning in DCD, but their results are contradictory. The aim of this study was to explore learning of motor sequence in DCD children by means of a modified version of the Serial Reaction Time (SRT) task where the standard keyboard was replaced by a touch screen in order to reduce the impact of the DCD group’s motor difficulties. A total of 34 children (17 with DCD and 17 typically developing (TD) children aged between 6 and 12 years old participated in this study. Results show that DCD children were able to learn the sequence as fast and as accurately as TD children. These findings, showing that children with DCD present the same degree of implicit learning as TD children, differ from those obtained by Gheysen et al. (2011) and so, challenge the motor sequence learning deficit hypothesis. We suggest that differences between studies are not related to an implicit sequence learning deficit per se in children with DCD, but rather to methodological aspects like the response mode used in the studies. [less ▲]Detailed reference viewed: 159 (2 ULg)
Is neon a viable solution to the solar model problem? Insights from nearby B-type stars
Morel, Thierry ;
in Journal of Physics Conference Series (2008), 118
The recent downward revision of the solar CNO photospheric abundances now leads to severe inconsistencies between theoretical models for the Sun's internal structure and the results of helioseismology ... [more ▼]
The recent downward revision of the solar CNO photospheric abundances now leads to severe inconsistencies between theoretical models for the Sun's internal structure and the results of helioseismology. There have been claims that the solar Ne abundance may be underestimated and that an increase in this ill-defined quantity could alleviate (or even completely solve) this problem. To address the validity of this hypothesis, we present a fully homogeneous non-LTE abundance analysis of the optical Ne I/II lines in a sample of 18 nearby B-type stars. Our very preliminary results point towards a mean neon abundance slightly higher than the new solar value, but apparently insufficient by itself to restore the agreement between the solar models and the helioseismological constraints. [less ▲]Detailed reference viewed: 7 (1 ULg)
Is neutrophil elastase associated with myeloperoxidase concentration and post-thawing parameters in equine frozen semen?
Ponthier, Jérôme ; de la Rebière de Pouyade, Geoffroy ; et al
in Animal Reproduction Science (2010), 121S
Non sperm cells concentration is higher in unfreezable semen. A relation between non-sperm cells in fresh semen and MPO and post thawing quality has been observed. Neutrophil Elastase seems to have no ... [more ▼]
Non sperm cells concentration is higher in unfreezable semen. A relation between non-sperm cells in fresh semen and MPO and post thawing quality has been observed. Neutrophil Elastase seems to have no effect on semen characteristics and to be not associated with on-sperm cells and freezability. [less ▲]Detailed reference viewed: 99 (34 ULg)
Is non-host pollen suitable for generalist bumblebees?
Vanderplanck, Maryse ; ; et al
in Insect Science (2016)
Current evidence suggests that pollen is both chemically and structurally protected. Despite increasing interest in studying bee-flower networks, the constraints for bee development related to pollen ... [more ▼]
Current evidence suggests that pollen is both chemically and structurally protected. Despite increasing interest in studying bee-flower networks, the constraints for bee development related to pollen nutritional content, toxicity and digestibility as well as their role in the shaping of bee-flower interactions have been poorly studied. In this study we combined bioassays of the generalist bee Bombus terrestris on pollen of Cirsium, Trifolium, Salix, and Cistus genera with an assessment of nutritional content, toxicity, and digestibility of pollen. Microcolonies showed significant differences in their development, non-host pollen of Cirsium being the most unfavorable. This pollen was characterized by the presence of quite rare δ7-sterols and a low digestibility. Cirsium consumption seemed increase syrup collection, which is probably related to a detoxification mixing behavior. These results strongly suggest that pollen traits may act as drivers of plant selection by bees and partly explain why Asteraceae pollen is rare in bee generalist diet. © 2016 Institute of Zoology, Chinese Academy of Sciences. [less ▲]Detailed reference viewed: 14 (0 ULg)
Het is nooit goed. Marginalia bij De pasvorm van de goede smaak van Marc Reynebeau
in Yang : Tijdschrift voor Literatuur en Kommunikatie (1995), 31(3-4), 111-121
This article criticizes the illusions of normative literary criticism, which hopes to determine 'once and for all' the true and objective value of literature.Detailed reference viewed: 34 (0 ULg)
Het is nooit te laat om (goed) te leren lezen ... Systematic review
Beaudart, Charlotte ; Rabenda, Véronique ; Bruyère, Olivier
in Gunaïkeia (2016), 21(9), 37-40
Een systematic review of systematisch literatuuronderzoek wordt meestal gebruikt om een samenvatting te maken van de resultaten van meerdere studies over hetzelfde onderwerp. Systematische ... [more ▼]
Een systematic review of systematisch literatuuronderzoek wordt meestal gebruikt om een samenvatting te maken van de resultaten van meerdere studies over hetzelfde onderwerp. Systematische literatuurstudies zijn dus heel belangrijk, in het bijzonder de voorbije jaren, waarin het aantal in de literatuur gepubliceerde artikelen is geëxplodeerd! Een systematic review wordt beschouwd als een onderzoek met een hoog wetenschappelijk bewijsniveau. Het staat aan de top van de piramide van de evidence-based medicine. Als het onderzoek van goede kwaliteit is, heeft het dus een hoger bewijsniveau dan gerandomiseerde gecontroleerde studies, cohortstudies, case-controlstudies… [less ▲]Detailed reference viewed: 18 (1 ULg)
Is novelty seeking a stable trait or not? Study of the importance of the environment in Swiss mice
Nyssen, Laura ; Quertemont, Etienne
Poster (2013, May 28)Detailed reference viewed: 31 (12 ULg)
Is Open Access just for articles in STM? Can OA books help Humanities? The Liège Experience
Rentier, Bernard ; Thirion, Paul
Scientific conference (2011, February 25)Detailed reference viewed: 113 (14 ULg)
Is organic farming a tool for sustainable development in Wallonia ?
Burny, Philippe ;
in Socaciu, Carmen (Ed.) The 12th International Symposium "Prospects for the 3rd Millennium Agriculture" : Book of abstracts, volume 1 (2013)Detailed reference viewed: 29 (5 ULg)
Is organic farming the solution for the future of Walloon agriculture ?
Burny, Philippe ;
in Atkociuniene (Ed.) The Sixth International Scientific Conference "Rural Development 2013" : Proceedings, volume 6, book 1 (2013)
Organic farming is considered to be one of the solutions for the problems of sustainability faced today by the agriculutral sector. This paper describes the growth of the Walloon organic sector during the ... [more ▼]
Organic farming is considered to be one of the solutions for the problems of sustainability faced today by the agriculutral sector. This paper describes the growth of the Walloon organic sector during the last years thanks to the support of the regional authorities through financial incentives and a new regional strategic development plan. It also presents some results collected during an on-farm survey concerning organic cereals. It appears that organic farming has significantly developed thaks to public support even if the prices of organic products are exceeding by 30% those of conventional products. Organic farming can play a significant role in the future of Walloon agriculture. However, due to the high conversion rate during these last years, it is not guaranteed that the financial support could be conserved at a such level. [less ▲]Detailed reference viewed: 31 (4 ULg)
Is paralysing lumbar disc herniation a surgical emergency ?
DUBUISSON, Annie ; BORLON, Sarah ; NGUYEN KHAC, Minh-Tuan et al
Conference (2011, March 26)Detailed reference viewed: 77 (9 ULg)
Is parenteral nutrition guilty?
; ; et al
in Intensive Care Medicine (2003), 29(11), 1861-1864Detailed reference viewed: 15 (0 ULg)
Is phonological short-term memory related to phonological analysis stages in auditory sentence processing?
Majerus, Steve ;
in European Journal of Cognitive Psychology (2009), 21Detailed reference viewed: 51 (13 ULg)