References of "2006"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailFiber optics opens window on stream dynamics
Selker, John; van de Giesen, Nick; Westhoff, Martijn ULg et al

in Geophysical Research Letters (2006), 33(24), 24401

A new approach to monitoring surface waters using distributed fiber optic temperature sensing is presented, allowing resolutions of temperature of 0.01°C every meter along a fiber optic cable of up to 10 ... [more ▼]

A new approach to monitoring surface waters using distributed fiber optic temperature sensing is presented, allowing resolutions of temperature of 0.01°C every meter along a fiber optic cable of up to 10,000 m in length. We illustrate the potential of this approach by quantifying both stream temperature dynamics and groundwater inflows to the Maisbich a first-order stream in Luxembourg (49°47′N, 6°02′E). The technique provides a very rich dataset, which may be of interest to many types of environmental research, notably that of stream ecosystems. [less ▲]

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailDiagnosing entrapment neuropathies: probes and magnets instead of electrodes and needles?
MAERTENS DE NOORDHOUT, Alain ULg

in Clinical Neurophysiology (2006), 117(3), 484-5

Detailed reference viewed: 8 (2 ULg)
Full Text
Peer Reviewed
See detailHydrogeological investigations at the Membach station, Belgium, and application to correct long periodic gravity variations
Van Camp, Michel; Vanclooster, Marnik; Crommen, O. et al

in Journal of Geophysical Research (2006), 111(B10),

A comprehensive hydrogeological investigation regarding the influence of variations in local and regional water mass on superconducting gravity measurements is presented for observations taken near the ... [more ▼]

A comprehensive hydrogeological investigation regarding the influence of variations in local and regional water mass on superconducting gravity measurements is presented for observations taken near the geodynamic station of Membach, Belgium. Applying a regional water storage model, the gravity contribution due to the elastic deformation of the Earth was derived. In addition, the Newtonian gravity effect induced by the local water mass variations was calculated, using soil moisture observations taken at the ground surface (about 48 m above the gravimeters). The computation of the gravimetric effect is based on a digital elevation model with spatially discretized rectangular prisms. The obtained results are compared with the observations of a superconducting gravimeter (SG). We find that the seasonal variations can be reasonably well predicted with the regional water storage model and the local Newtonian effects. Shorter-period effects depend on the local changes in hydrology. This result shows the sensitivity of SG observations to very local water storage changes. [less ▲]

Detailed reference viewed: 104 (14 ULg)
Full Text
Peer Reviewed
See detailUltrasound fetal measurements and pregnancy associated glycoprotein secretion in early pregnancy in cattle recipients carrying somatic clones
Chavatte-Palmer, P.; Melo de Sousa, Noelita ULg; Laigre, P. et al

in Theriogenology (2006), 66(4), 829-840

Somatic cloning in the bovine species leads to high levels of fetal losses which occur throughout pregnancy. These losses are most often associated with fetal overgrowth, a syndrome known as large ... [more ▼]

Somatic cloning in the bovine species leads to high levels of fetal losses which occur throughout pregnancy. These losses are most often associated with fetal overgrowth, a syndrome known as large offspring syndrome (LOS), and excessive maternal plasma pregnancy serum protein 60 (PSP60), a protein similar to a pregnancy-associated glycoprotein of 67 kDa (PAG 167) produced by the bovine placenta. Predicting the outcome of pregnancies initiated from cloned embryos has become an important issue both to prevent potential harm to the mother because of excessive fetal size at birth and also to get a better understanding of the relationships between growth, differentiation and placental functions in developing cloned fetuses. Here, we report on a systematic analysis of fetal and placental development in the first trimester of pregnancy performed by ultrasonographic imaging and by measurement of the maternal concentrations of pregnancy associated glycoproteins (PAGS), using four different radioimmunoassays (RIA) (two homologous RIA systems with PSP60 and PAG 167; two heterologous RIA systems with PAG 167 as standard and tracer, and antisera anti-caprine PAGs). We showed that crown-rump length (CRL) in clones appeared smaller than controls at 35, 50 and 62 days (P < 0.05). At 62 days of pregnancy, CRL in cloned fetuses that died before 90 days was smaller compared to the other cloned fetuses (P < 0.05) whereas the width of the fetal sack and the biparietal diameter (BPD) was larger in fetuses that developed LOS in late gestation (P < 0.05). Maternal PAGs concentrations were statistically different between controls and all clone recipients as early as Day 34, suggesting early abnormal placental glycoprotein synthesis for clone pregnancies regardless of pregnancy outcome. This work provides a practical, non-invasive tool to follow up clone pregnancies and suggests that primary growth retardation and abnormal placental function precedes excessive fetal and placental growth at later stages of pregnancy. (c) 2006 Elsevier Inc. All rights reserved. [less ▲]

Detailed reference viewed: 58 (1 ULg)
Full Text
Peer Reviewed
See detailGemvid, an Open Source, Modular, Automated Activity Recording System for Rats Using Digital Video
Poirrier, Jean-Etienne; Poirrier, Laurent; Leprince, Pierre ULg et al

in Journal of Circadian Rhythms (2006), 4

BACKGROUND: Measurement of locomotor activity is a valuable tool for analysing factors influencing behaviour and for investigating brain function. Several methods have been described in the literature for ... [more ▼]

BACKGROUND: Measurement of locomotor activity is a valuable tool for analysing factors influencing behaviour and for investigating brain function. Several methods have been described in the literature for measuring the amount of animal movement but most are flawed or expensive. Here, we describe an open source, modular, low-cost, user-friendly, highly sensitive, non-invasive system that records all the movements of a rat in its cage. METHODS: Our activity monitoring system quantifies overall free movements of rodents without any markers, using a commercially available CCTV and a newly designed motion detection software developed on a GNU/Linux-operating computer. The operating principle is that the amount of overall movement of an object can be expressed by the difference in total area occupied by the object in two consecutive picture frames. The application is based on software modules that allow the system to be used in a high-throughput workflow. Documentation, example files, source code and binary files can be freely downloaded from the project website at http://bioinformatics.org/gemvid/. RESULTS: In a series of experiments with objects of pre-defined oscillation frequencies and movements, we documented the sensitivity, reproducibility and stability of our system. We also compared data obtained with our system and data obtained with an Actiwatch device. Finally, to validate the system, results obtained from the automated observation of 6 rats during 7 days in a regular light cycle are presented and are accompanied by a stability test. The validity of this system is further demonstrated through the observation of 2 rats in constant dark conditions that displayed the expected free running of their circadian rhythm. CONCLUSION: The present study describes a system that relies on video frame differences to automatically quantify overall free movements of a rodent without any markers. It allows the monitoring of rats in their own environment for an extended period of time. By using a low-cost, open source hardware/software solution, laboratories can greatly simplify their data acquisition and analysis pipelines and improve their workload. [less ▲]

Detailed reference viewed: 106 (10 ULg)
Full Text
Peer Reviewed
See detailProneural bHLH and Brn proteins coregulate a neurogenic program through cooperative binding to a conserved DNA motif.
Castro, Diogo S; Skowronska-Krawczyk, Dorota; Armant, Olivier et al

in Developmental Cell (2006), 11(6), 831-44

Proneural proteins play a central role in vertebrate neurogenesis, but little is known of the genes that they regulate and of the factors that interact with proneural proteins to activate a neurogenic ... [more ▼]

Proneural proteins play a central role in vertebrate neurogenesis, but little is known of the genes that they regulate and of the factors that interact with proneural proteins to activate a neurogenic program. Here, we demonstrate that the proneural protein Mash1 and the POU proteins Brn1 and Brn2 interact on the promoter of the Notch ligand Delta1 and synergistically activate Delta1 transcription, a key step in neurogenesis. Overexpression experiments in vivo indicate that Brn2, like Mash1, regulates additional aspects of neurogenesis, including the division of progenitors and the differentiation and migration of neurons. We identify by in silico screening a number of additional candidate target genes, which are recognized by Mash1 and Brn proteins through a DNA-binding motif similar to that found in the Delta1 gene and present a broad range of activities. We thus propose that Mash1 synergizes with Brn factors to regulate multiple steps of neurogenesis. [less ▲]

Detailed reference viewed: 68 (9 ULg)
Full Text
See detailAn outreach experience
Nazé, Yaël ULg

in European Planetary Science Congress 2006 (2006)

In our technological world, Science is everywhere and to participate to the public debates, citizens will need some basic scientific notions. Raising awareness of the public in Science is thus always ... [more ▼]

In our technological world, Science is everywhere and to participate to the public debates, citizens will need some basic scientific notions. Raising awareness of the public in Science is thus always worthwhile, even though only a small fraction of the audience will envisage a career in the field. Bringing science to the layman should even be a duty for scientists: we should not forget that we are paid by taxpayers, and are part of a public service; and besides, people tend to reject things that they do not understand - to get support, scientists need to enter the public arena and confront the crowd. Relying on attractive images and a timeless fascination, astronomy is particularly suited to do that. But what should a willing astronomer do to share (his/her) knowledge? There is certainly no definitive answer for that, but a few hints can still be given. Based on personal experience, this talk will present a few tips and things to avoid in three cases: animations (for kids and grown-ups), writing, and talking. [less ▲]

Detailed reference viewed: 16 (1 ULg)
Full Text
Peer Reviewed
See detailEarly Evidence of Complexity in Lithic Economy: Core-axe Production, Hafting and Use at Late Middle Pleistocene site 8-B-11, Sai Island (Sudan)
Rots, Veerle ULg; Van Peer, Philip

in Journal of Archaeological Science (2006), 33(3), 360-371

Detailed reference viewed: 26 (0 ULg)
Full Text
Peer Reviewed
See detailIrreversible passive energy transfer in coupled oscillators with essential nonlinearity
Kerschen, Gaëtan ULg; Lee, Young Sup; Vakakis, Alexander F. et al

in SIAM Journal on Applied Mathematics (2006), 66(2), 648-679

We study numerically and analytically the dynamics of passive energy transfer from a damped linear oscillator to an essentially nonlinear end attachment. This transfer is caused by either fundamental or ... [more ▼]

We study numerically and analytically the dynamics of passive energy transfer from a damped linear oscillator to an essentially nonlinear end attachment. This transfer is caused by either fundamental or subharmonic resonance capture, and in some cases is initiated by nonlinear beat phenomena. It is shown that, due to the essential nonlinearity, the end attachment is capable of passively absorbing broadband energy at both high and low frequencies, acting, in essence, as a passive broadband boundary controller. Complicated transitions in the damped dynamics can be interpreted based on the topological structure and bifurcations of the periodic solutions of the underlying undamped system. Moreover, complex resonance capture cascades are numerically encountered when we increase the number of degrees of freedom of the system. The ungrounded essentially nonlinear end attachment discussed in this work can find application in numerous practical settings, including vibration and shock isolation of structures, seismic isolation,. utter suppression, and packaging. [less ▲]

Detailed reference viewed: 35 (6 ULg)
Full Text
Peer Reviewed
See detailImpact of low-frequency transcranial magnetic stimulation on brain automatic information processing - A mismatch negativity study
Laloyaux, Olivier ULg; Ansseau, Marc ULg; Hansenne, Michel ULg

in Journal of Psychophysiology (2006), 20(4), 267-275

Repetitive transcranial magnetic stimulation (rTMS) is considered a powerful method for the study of the relationships between cortical activity and-cognitive processes. Previous ERPs studies' that ... [more ▼]

Repetitive transcranial magnetic stimulation (rTMS) is considered a powerful method for the study of the relationships between cortical activity and-cognitive processes. Previous ERPs studies' that focused on P300 response have shown that inhibitory/excitatory effects on prefrontal cortex (PFC), induced by low- and high-frequency rTMS, were able to modulate controlled but not automatic information processing. The present study assessed the impact of inhibition over left and right PFC induced by rTMS on mismatch negativity (MMN), which is known to represent automatic cerebral processes for detecting change. Auditory MMN was recorded in 20 subjects before and after application of left and right PFC 1-Hz rTMS for 15 min. MMN was also recorded before and after a sham-occipital 1-Hz rTMS as control condition. Results showed that 1-Hz rTMS induced no modification to either MMN latency or amplitude. In addition, N100 and P200 components to the frequent tones were not affected by rTMS. These results are consistent with previous findings showing that rTMS; over both PFC is unable to disrupt automatic information processing. However, since two sites were stimulated in the present-study, no definite conclusions about the inability of rTMS to disrupt automatic processing can be made. [less ▲]

Detailed reference viewed: 87 (4 ULg)
Full Text
See detailPotential of mid-infrared spectrometry for prediction of fatty acid contents in cow milk
Soyeurt, Hélène ULg; Dehareng, Frédéric; Dardenne, Pierre et al

Poster (2006)

Detailed reference viewed: 37 (5 ULg)
See detailPattern and process in landscape ecology
Bogaert, Jan ULg

Scientific conference (2006)

Detailed reference viewed: 15 (4 ULg)
Full Text
See detailNew firm property and regional and local service development
Merenne-Schoumaker, Bernadette ULg

in GeolNova (2006), (12), 381-395

In less than ten years, a corporate property market has emerged in Wallonia. This market first covered offices and retail units and recently extended to semi-industrial establishments. Its development is ... [more ▼]

In less than ten years, a corporate property market has emerged in Wallonia. This market first covered offices and retail units and recently extended to semi-industrial establishments. Its development is largely related to the creation of a new type of demand resulting from the growth of new service activities and from new expectations regarding physical units, environment, accessibility and location choices – on both sub-regional and local scales. It has been favoured by the appearance of new property stakeholders, Belgians as well as foreigners (developers, investors and estate agents), but also by public authorities (the Walloon Region and economic development supra-communal agencies). This market’s emergence is related to the deepening of territorial contrasts as property development projects usually reinforce strong areas. [less ▲]

Detailed reference viewed: 142 (4 ULg)
Full Text
See detailOrganiser la formation CAPAES : une expérience qui suscite quelques questions
Merenne-Schoumaker, Bernadette ULg

in Puzzle (2006), (20), 31-35

Bilan de l'expérience CAPAES à l'Université de Liège après quatre ans. Analyse au départ de cinq grandes questions

Detailed reference viewed: 22 (1 ULg)
Full Text
Peer Reviewed
See detailPaying Attention to Language, Replicas and the Role of the Artist in Janet Frame's Living in the Maniototo
Tunca, Daria ULg

in Journal of Postcolonial Writing (2006), 42(1), 32-43

Janet Frame's 1979 novel Living in the Maniototo features a ubiquitous narrator whose multiple personalities are linked by a common interest in creation. This choice of narrative perspective, coupled with ... [more ▼]

Janet Frame's 1979 novel Living in the Maniototo features a ubiquitous narrator whose multiple personalities are linked by a common interest in creation. This choice of narrative perspective, coupled with the characters and events depicted in the book, provides the basis for an exploration of the related concepts of art, language and replicas. By establishing connections between these elements, this article attempts to unveil the dynamics at work in the novel's multi-layered structure and thus shed light on the role of the artist in the narrative and, by extension, on the author's metafictional strategy. [less ▲]

Detailed reference viewed: 100 (17 ULg)
Full Text
Peer Reviewed
See detailDancing droplets onto liquid surfaces
Vandewalle, Nicolas ULg; Terwagne, Denis ULg; mulleners, karin et al

in Physics of Fluids (2006), 18

Detailed reference viewed: 50 (9 ULg)
Full Text
See detailOccupational Activities and Cognitive Reserve: a Frontier Approach Applied to the Survey on Health, Ageing, and Retirement in Europe (SHARE)
Adam, Stéphane ULg; Bonsang, Eric; Germain, Sophie ULg et al

Report (2006)

The aim of this paper was to use a parametric stochastic frontier approach (coming from the economic literature) to explore the impact of the concept of activity (taken in a broad sense: i.e., including ... [more ▼]

The aim of this paper was to use a parametric stochastic frontier approach (coming from the economic literature) to explore the impact of the concept of activity (taken in a broad sense: i.e., including both professional and non-professional activities) on the constitution and the care of cognitive reserve among the European population aged 50 and up. For this purpose, we use individual data collected during the first wave of SHARE (Survey on Health, Ageing and Retirement in Europe) performed in 2004. The advantages of this survey were (1) it included a large population (n = 18,623) geographically distributed throughout Europe; and (2) it simultaneously analyzed several dimensions (physical and mental health, mobility, occupational activities, socioeconomic status, etc.). Our results confirm the positive impact of occupational activities on the cognitive functioning of elderly people. These results are discussed in terms of the prevention of cognitive aging and Alzheimer’s disease, and more particularly of retirement policy issues. [less ▲]

Detailed reference viewed: 72 (8 ULg)
Full Text
Peer Reviewed
See detailDévelopper une approche par compétences dans la formation universitaire. Bilan de trois expériences en géographie urbaine et économique
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Géographique de Liège (2006), (48), 55-64

In this article, we’ll be wondering about the point, the challenges and the limits of integrating competences in Higher Education, starting from three experiences lead in Urban and Economic Geography. For ... [more ▼]

In this article, we’ll be wondering about the point, the challenges and the limits of integrating competences in Higher Education, starting from three experiences lead in Urban and Economic Geography. For this purpose, we’ve managed to combine works from Higher Education specialists and observations from the field. This reflection has been built in three stages. First, we’ll be reminding the foundations and specificities of the competence based approach. Then, we’ll be analysing our three experiences with the help of a common grid allowing us to successively consider the original needs and motivations, the process design, its trial and its adjustment. Finally, we’ll be trying to draw conclusion in terms of impacts on the students learning process, and impacts on the way teachers approach their teaching process, its limits and constraints. [less ▲]

Detailed reference viewed: 119 (7 ULg)
Peer Reviewed
See detailUsing physiological signals for sound creation
Filatriau, J. J.; Lehembre, Remy ULg; Noirhomme, Quentin ULg et al

in Proceedings of the 11-th International Conference Speech and Computer, SPECOM'2006 (2006)

Detailed reference viewed: 7 (0 ULg)