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 detailPlankton dynamics controlled by hydrodynamic processes near a submarine canyon off NW corsican coast: A numerical modelling study
Skliris, Nikolaos ULg; Djenidi, Salim ULg

in Continental Shelf Research (2006), 26(11), 1336-1358

A three-dimensional (3D) non-linear high-resolution hydrodynamic model coupled to a coastal plankton ecosystem model is used to estimate the impact of hydrodynamic processes on the evolution of the spring ... [more ▼]

A three-dimensional (3D) non-linear high-resolution hydrodynamic model coupled to a coastal plankton ecosystem model is used to estimate the impact of hydrodynamic processes on the evolution of the spring phytoplankton bloom in the vicinity of a submarine canyon. Model results for the plankton distribution showed a clear 3D character around and in the canyon, with large horizontal and vertical gradients, induced by the hydrodynamic constraints. Phytoplankton concentrations were significantly larger all along the slope domain with maximum values obtained over the canyon. Upwelling of deep water rich in nitrate takes place both upstream (with respect to the current direction normal to the central axis of the canyon) and downstream of the canyon enhancing primary production. As phytoplankton-rich water enters into the western part of the canyon it is downwelled and trapped by the cyclonic circulation leading to accumulation of phytoplankton biomass there. The effect of wind events was to induce an upward nitrate flux into the upper layer through vertical turbulent diffusion, allowing the start of a short-live phytoplankton bloom. Maximum surface nitrate concentrations were found along the slope and particularly upstream and downstream of the canyon just after the wind stopped. Enhanced turbulent diffusion combined with upwelling motion in these areas resulted in larger upward nitrate transports, further enhancing primary production. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 15 (3 ULg)
See detailPlankton ecology of Lake Kivu and the consequences of a planktivore introduction
Descy, Jean-Pierre; Sarmento, Hugo; Isumbisho, Mwapu et al

Conference (2007, July 09)

Detailed reference viewed: 1 (0 ULg)
See detailPlankton productivity in the Gulf of Calvi
Dauby, Patrick ULg

in Van Grieken, R; Wollast, Roland (Eds.) Progress in Belgian Oceanographic Research (1985)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailPlanktonic and whole system metabolism in a nutrient rich estuary (the Scheldt estuary)
Gazeau, Frédéric; Gattuso, Jean-Pierre; Middelburg, Jack J. et al

in Estuaries (2005), 28(6), 868-883

Planktonic gross primary production (GPP), community respiration (CR), and nitrification (NIT) were measured monthly in the Scheldt estuary by the oxygen incubation method in 2003. No significant ... [more ▼]

Planktonic gross primary production (GPP), community respiration (CR), and nitrification (NIT) were measured monthly in the Scheldt estuary by the oxygen incubation method in 2003. No significant evolution of planktonic GPP was observed since the 1990s with high rates in the freshwater area (salinity 0; 97 6 65 mmol C m22 d21) decreasing seaward (22–37 mmol C m22 d21). A significant decrease of NIT was observed with regard to previous investigations although this process still represents up to 20% of total organic matter production in the inner estuary. Planktonic CR was highest in the inner estuary and seemed to be mainly controlled by external organic matter inputs. Planktonic net community production was negative most of the time in the estuary with values ranging from 2300 to 165 mmol C m22 d21. Whole estuary net ecosystem production (NEP) was investigated on an annual scale using the results mentioned above and published benthic metabolic rates. A NEP of 239 6 8 mmol C m22 d21 was estimated, which confirms the strong heterotrophic status of this highly nutrified estuary. NEP rates were computed from June to December 2003 to compare with results derived from the Land-Ocean Interaction in the Coastal Zone budgeting procedure applied to dissolved inorganic phosphorus and carbon (DIP and DIC). DIP budgets failed to provide realistic estimates in the inner estuary where abiotic processes account for more than 50% of the nonconservative DIP flux. DIC budgets predicted a much lower NEP than in situ incubations (2109 6 31 versus 242 6 9 mmol C m22 d21) although, as each approach is associated with several critical assumptions, the source of this discrepancy remains unclear. [less ▲]

Detailed reference viewed: 12 (2 ULg)
See detailPlanktonic Archaea in Lake Kivu
Llirós, Marc; Darchambeau, François ULg; Plasencia, Anna et al

Conference (2007, September 02)

Detailed reference viewed: 3 (2 ULg)
See detailPlanktonic Archaea in Lake Kivu
Llirós, Marc; Darchambeau, François ULg; Plasencia, Anna et al

Conference (2007, June 12)

Detailed reference viewed: 8 (3 ULg)
Full Text
Peer Reviewed
See detailPlanning Decisions of Physical Education Teachers
Piéron, Maurice ULg; Cloes, Marc ULg

in Retos. Nuevas tendencias en Educación Física, Deporte y Recreación (2007), 12(2e semestre), 5-12

Forty-six PE teachers participated in the study. Among them, 27 had an experience of more than five years in teaching (12 women and 15 men) and 19 beginning teachers (12 women and 7 men). Teachers were ... [more ▼]

Forty-six PE teachers participated in the study. Among them, 27 had an experience of more than five years in teaching (12 women and 15 men) and 19 beginning teachers (12 women and 7 men). Teachers were presented five scenarios of instructional situations. They were asked to read each scenario and write a response detailing how they would react if the situation occurred during their teaching. Four hundred thirty-four proposals of actions were gathered and analysed since an answer could have many different proposals. The actions proposed were analysed from audiotapes of teachers’ interviews. They were classified according to an inductive technique. The opinions of experienced teachers, men and women, differed than those of their beginning colleagues, as indicated by the number and content of categories. Four categories of decisions dealt with the content of education: «adaptation of the exercises to the student», «creation of levels groups», «gradation of the difficulty», and «same activity for all.» The teachers had strategies immediately available to deal with the students’ individual differences. According to their personal characteristics, experienced teachers displayed a greater variety of application of sound principles of teaching. [less ▲]

Detailed reference viewed: 65 (6 ULg)
Full Text
Peer Reviewed
See detailPlanning flood risk reducing measures based on combined hydraulic and socio-economic impact modelling at a micro-scale
Ernst, Julien ULg; Coninx, Ingrid; Dewals, Benjamin ULg et al

in Christodoulou, S. E. (Ed.) Proc. 7th Int. Conf. on Water Resources Conservancy and Risk Reduction Under Climatic Uncertainty (2009, June)

Risk management is currently shifting from the full protection against flooding towards the management of the consequences of flooding. To reduce these consequences, micro-scale analysis is compelled. In ... [more ▼]

Risk management is currently shifting from the full protection against flooding towards the management of the consequences of flooding. To reduce these consequences, micro-scale analysis is compelled. In addition to the hydraulic modelling of the inundation flow, nearby land use and vulnerability of elements-at-risk are taken into consideration. This new approach requests an interdisciplinary collaboration of scientists from hydraulic and social science, as is the case for this paper. The research teams have developed a methodology to evaluate socio-economic consequences of flooding based on the analysis at the micro-scale of the flood characteristics, the exposure and the vulnerability of elements-at-risk and the adaptive capacity of society. The hydrodynamic simulations are conducted by means of 2D flow modelling run on a highly accurate Digital Surface Model - DSM with a resolution of 2 by 2 meters. The two-dimensional modelling provides high resolution flood maps detailing the distribution of water depth and flow velocity field in the floodplains, which constitute key inputs for the subsequent flood risk analysis. The methodology will be illustrated for a case study along River Ourthe, which is the main tributary of River Meuse in Belgium, for selecting and designing flood protection measure. The geographic data in this area are available at a resolution consistent with the conducted micro-scale risk analysis. They include data on social vulnerability coming from the most recent socio-economic national survey (NIS). [less ▲]

Detailed reference viewed: 31 (5 ULg)
See detailPlanning of the river Ourthe in Wallonia, Belgium.
Petit, François ULg; Pirotton, Michel ULg; Philippart, Jean-Claude ULg et al

in River design and environmental protection in Europe (1999)

Detailed reference viewed: 18 (2 ULg)
Full Text
Peer Reviewed
See detailPlanning Readings: a Comparative Exploration of Basic Algorithms
Piater, Justus ULg

in Computer Science Education (2009), 19(3), 179--192

Detailed reference viewed: 3 (0 ULg)
Full Text
Peer Reviewed
See detailPlanning the capital city of a "community of fortune" in the Soviet Far-East: the Hannes Meyer brigade's scheme for the Jewish autonomous oblast of Birobidzhan (1933-1934)
Fisher, Axel ULg

in 15th IPHS Conference “Cities, nations and regions in planning history” (2012, July)

The creation of the first modern-era Jewish state, Birobidzhan, in early 1930s’ Soviet Union, can be considered as a curtain-raiser attempt to propose a socialist solution to the “Jewish Question” which ... [more ▼]

The creation of the first modern-era Jewish state, Birobidzhan, in early 1930s’ Soviet Union, can be considered as a curtain-raiser attempt to propose a socialist solution to the “Jewish Question” which, as a second thought, also had a part in the regime’s propagandistic maneuvers enacted to downsize the rising influence of Zionism in the country. Nevertheless, this experiment aroused a widespread enthusiasm and called for the participation of both Jews and non-Jews to this “small step in the realization of the Leninist policy on nationalities”. Among these stood Hannes Meyer (1889-1954), the Swiss-born Marxist architect and former director of Dessau’s Bauhaus (1928-1930), which – assisted by his “planning brigade” – offered its expertise to the Soviet Institute for Urban Planning (GIPROGOR) from 1930 to 1936 as chief-planner for Siberia and the Far East. Within this context, Meyer’s brigade was entrusted with the preparation of a scheme for the transformation of the small town of Tikhonkaya situated along the Trans-Siberian Railway into the new Capital of Birobidzhan. This scheme, one of Meyer’s last projects in Soviet Union, represents a step in the planer’s line of research focused on the forms and principles of the “socialist city” – the “elastic city” theory – but, unlike his previous schemes, this work also had to face an additional challenge: expressing the new Jewish national identity of the city and its role as the Soviet Jewish people’s Capital city. How did the planner achieve these goals and what place did modern planning models, the “rhetoric of rationality”, Jewish culture, vernacular architectural and urban forms, the local geographical features and landscape hold in the design and figuration process? [less ▲]

Detailed reference viewed: 30 (1 ULg)
Full Text
Peer Reviewed
See detailPlanning under uncertainty, ensembles of disturbance trees and kernelized discrete action spaces
Defourny, Boris ULg; Ernst, Damien ULg; Wehenkel, Louis ULg

in Proceedings of the IEEE International Symposium on Adaptive Dynamic Programming and Reinforcement Learning (ADPRL-09) (2009)

Optimizing decisions on an ensemble of incomplete disturbance trees and aggregating their first stage decisions has been shown as a promising approach to (model-based) planning under uncertainty in large ... [more ▼]

Optimizing decisions on an ensemble of incomplete disturbance trees and aggregating their first stage decisions has been shown as a promising approach to (model-based) planning under uncertainty in large continuous action spaces and in small discrete ones. The present paper extends this approach and deals with large but highly structured action spaces, through a kernel-based aggregation scheme. The technique is applied to a test problem with a discrete action space of 6561 elements adapted from the NIPS 2005 SensorNetwork benchmark. [less ▲]

Detailed reference viewed: 25 (8 ULg)
See detailPlans expérimentaux
Boulanger, Bruno ULg; Govaerts, B.; Le Boulengé, E. et al

Learning material (2010)

Vidéos du cours intitulé "Plans expérimentaux"

Detailed reference viewed: 88 (15 ULg)
Full Text
See detailLes plans planétaires et l'équateur solaire par M. Niesten: rapport de F. Folie
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1888), 3e série, t. 15(1), 4-7

The author establishes a report on a Mr. Niesten on the planetary plans and the solar equator.

Detailed reference viewed: 2 (0 ULg)
Full Text
Peer Reviewed
See detailLes plans simples de gestion pour les ressources des communautés
Dubiez, Emilien; Vermeulen, Cédric ULg; Larzillière, Adélaïde et al

in Louppe, Dominique; Larzillière, Adélaïde (Eds.) Quand la ville mange la forêt : les défis du bois-énergie en Afrique centrale (2013)

Detailed reference viewed: 31 (7 ULg)
Peer Reviewed
See detailThe plant alkaloid usambarensine intercalates into DNA and induces apoptosis in human HL60 leukemia cells
Dassonneville, L.; Wattez, N.; Mahieu, C. et al

in Anticancer Research (1999), 19(6B), 5245-5250

Detailed reference viewed: 28 (3 ULg)
Peer Reviewed
See detailPlant and their soil environment
Delaplace, Pierre ULg

Conference (2009)

Detailed reference viewed: 10 (3 ULg)
Full Text
Peer Reviewed
See detailPlant communities and species richness of the calcareous grasslands in southeast Belgium
Piqueray, Julien ULg; Bisteau, Emmanuelle ULg; Bottin, Gaëtan et al

in Belgian Journal of Botany (2007), 140(2), 157-173

Calcareous grasslands are biodiversity hotspots in Western Europe. In Belgium, a number of phytosociological surveys have been realized in these habitats, but none covers the whole range of calcareous ... [more ▼]

Calcareous grasslands are biodiversity hotspots in Western Europe. In Belgium, a number of phytosociological surveys have been realized in these habitats, but none covers the whole range of calcareous grasslands at the regional scale. The aim of this study was (i) to provide a synthesis of the floristic variation of calcareous grasslands of the Calestienne natural region using a uniform methodology; (ii) to relate floristic variation to environmental variables, and (iii) to characterize the specific diversity of the different grassland communities that occur in the study region. Seven different communities were identified with the TWINSPAN method. The originality of the grasslands on calcareous and calcareo-siliceous rocks was statistically confirmed. Significant differences for environmental variables were identified among the seven communities by a MANOVA. Main differences between communities were related to xericity and pH, although a north-south gradient was also identified. More xeric grasslands were located in the southern part of the study region while northern part was occupied by more mesophilous grasslands. Multiple regressions were used to describe the influence of the environmental conditions on plant species richness. The most mesophilous grasslands appeared to be the most species-rich while soil acidity negatively affected species richness. [less ▲]

Detailed reference viewed: 52 (20 ULg)