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
Peer Reviewed
See detailDeciphering human-climate interactions in ombrotrophic peat record : REE, Nd and Pb isotope signatures of dust supplies over the last 2500 years (Misten bog, Belgium)
Fagel, Nathalie ULg; Allan, Mouhamd ULg; le roux, Gael et al

Poster (2013, April 08)

A core of 173 cm of ombrotrophic Misten peat bog from the Hautes-Fagnes Plateau in Eastern Belgium provides a record of Rare Earth Elements (REE) deposition allowing to trace dust fluxes in West Europe ... [more ▼]

A core of 173 cm of ombrotrophic Misten peat bog from the Hautes-Fagnes Plateau in Eastern Belgium provides a record of Rare Earth Elements (REE) deposition allowing to trace dust fluxes in West Europe during the historical record (last 2500 years). REE and lithogenic element analyses, as well as the Nd isotopes, were performed by HR-ICP-MS and MC-ICP-MS, respectively in peat layers dated by 210Pb and 14C. The parallel variations of REE concentration with lithogenic conservative elements confirms that REE are immobile in the studied peat bog and can be used as tracers of dust deposition. Dust fluxes show pronounced increase at BC300, AD600, 1000AD,1200AD and from 1700AD, recording either influence of human activities (regional erosion due to forest clearing and soil cultivation activities) or local and regional climate changes. Using Nd isotope allows to decipher between local and distal causes. The ENd variability (-13 to -9) is interpreted by a mixing between dust sources fromlocal soils and desert particles. Three periods characterised by dominant-distal sources (at 320AD, 1000 AD and 1700AD) are consistent with local wetter intervals as indicated by lower humi[U+FB01]cation degree. Local erosion prevails durier drier (higher humification) intervals (-100AD, 600AD). On a global scale more distal supplies are driven during colder periods, in particular Oort and Maunder minima. Combining geochemical elementary content and isotope data in ombrotrophic peat allows to decipher between dust flux changes related to human and climate forcing. [less ▲]

Detailed reference viewed: 36 (5 ULg)
Full Text
See detailDeciphering Langer's lines using dermoscopy.
QUATRESOOZ, Pascale ULg; Devillers, Céline; PIERARD, Gérald ULg

in European Dermatology (2010), (5), 54-56

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailDeciphering supportive treatment strategies for toxic epidermal necrolysis.
Jennes, Serge; PIERARD, Gérald ULg; Paquet, Philippe

in Current Drug Safety (2012), 7(5), 361-6

Toxic epidermal necrolysis (TEN) is a dreadful life-threatening syndrome typically induced by an adverse drug reaction. This condition is characterized by the sudden and extensive destruction of the ... [more ▼]

Toxic epidermal necrolysis (TEN) is a dreadful life-threatening syndrome typically induced by an adverse drug reaction. This condition is characterized by the sudden and extensive destruction of the epidermis. The patient should be promptly addressed to a burn unit where three types of treatment should be administered, namely, (a) specific topical care of the bullous/eroded skin areas, (b) systemic anti-apoptotic/necrotic treatments, and (c) supportive care preventing secondary internal organ failures. This latter aspect is covered by the present review and focuses on (a) early withdrawal of the causative drug, (b) airway management, (c) hydro-electrolytic control, (d) nutritional support, (e) antibiotherapy, (f) prevention of venous thrombosis and gastroduodenal ulcers, and (g) analgesia and anesthesia. [less ▲]

Detailed reference viewed: 17 (3 ULg)
Full Text
Peer Reviewed
See detailDeciphering the impaired cytokine cascades in chronic leg ulcers (review).
Quatresooz, Pascale ULg; Henry, Frédérique ULg; Paquet, Philippe ULg et al

in International Journal of Molecular Medicine (2003), 11(4), 411-8

Chronic leg ulcers are typically wounds that do not heal at a normal rate. Impaired healing appears to be due to primary microvascular changes and it is aggravated by ongoing bacteria-driven vasculitis ... [more ▼]

Chronic leg ulcers are typically wounds that do not heal at a normal rate. Impaired healing appears to be due to primary microvascular changes and it is aggravated by ongoing bacteria-driven vasculitis. The various cytokines identified in experimental wounds are also present in leg ulcers. VEGF is strongly implicated as a promoter of blood vessel growth in patients with venous disease. In addition, there is good evidence of increased expression of bFGF, TGF-beta1, and PDGF in lipodermatosclerosis. All of these growth factors are involved in wound healing. Upregulated TGF-beta1 is probably one of the main causes of the fibrosis observed in lipodermatosclerosis. In leg ulcers, cytokines appear to be trapped in the perivascular fibrinoid deposits. It is not the nature and amount of cytokines that are inadequate in leg ulcers, but rather their spatial distribution. Dermal dendrocytes (DD) are resident factor XIIIa-enriched macrophages. They likely play a role in tissue repair when boosted adequately. New therapies aiming at helping the release of cytokines by DD apparently promote and improve the healing phase. [less ▲]

Detailed reference viewed: 22 (2 ULg)
See detailDeciphering the record of early life in Precambrian oceans
Javaux, Emmanuelle ULg

Scientific conference (2008)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailDeciphering the record of early life in Precambrian oceans using combined microscopy and microchemistry of organic-walled microfossils.
Javaux, Emmanuelle ULg; Marshall, C. P.

in Geochimica et Cosmochimica Acta (2007), 71(15), 442

Detailed reference viewed: 9 (1 ULg)
Full Text
Peer Reviewed
See detailDeciphering the role of 75KDA SIRT1 fragment in osteoarthritis
Dvir-Ginzberg, M; Oppenheimer, H; Meir, H et al

in Osteoarthritis and Cartilage (2013), 21

Detailed reference viewed: 3 (0 ULg)
Full Text
See detailA decision analyst's views on the nuclear debate. From a nightmare to a daydream.
Leclercq, Dieudonné ULg

in THILL, Georges; FOUREZ, Gérard (Eds.) Le débat nucléaire (1977)

After having described the model (maximization of expected utility) on which is based the modern decision making theory, the author lists a series of obstacles that make difficult its application ... [more ▼]

After having described the model (maximization of expected utility) on which is based the modern decision making theory, the author lists a series of obstacles that make difficult its application (nightmare), in particular in the nuclear debate. Then, he mentions in which respect one can be inspired by an on going real project managed according to these principles : Ward Edwards' contribution to a desegregation project in Los angeles. Then the author imagines (daydream) the eight steps of a solution to the nuclear debate via decision making with a strong democratic commitment (To will, perchance to win). Then he indicates ongoing real works (with similar theoretical inspirations) on the nuclear debate. [less ▲]

Detailed reference viewed: 16 (0 ULg)
Full Text
Peer Reviewed
See detailLa décision de traitement des risques dans l’entreprise sociale : le rôle de la perception des dirigeants à l’égard du risque, de l’incertitude et de la sécurité
Kamto Kenmogne, Marius ULg; Van Caillie, Didier ULg

Conference (2013, July 04)

Recent developments in the fields of research focused on risk management plea for moving from a silo-perspective (focused on a separate and cross-sectional management of risks) to an holistic and ... [more ▼]

Recent developments in the fields of research focused on risk management plea for moving from a silo-perspective (focused on a separate and cross-sectional management of risks) to an holistic and integrated view of the risk management function (called Enterprise Risk Management or ERM), in which risks, uncertainties and resources are considered globally as a whole. Despite the numerous papers focused on risks and risk management in firms, no specific study appears to be devoted to the strategies implemented in order to manage risks in social enterprises. Our paper aims to fulfill this absence and discusses the results of an empirical study that analyses the impact of the perception of the concepts of risk, uncertainty and security on the decision for managing risks in social enterprises. [less ▲]

Detailed reference viewed: 82 (20 ULg)
See detailDecision making for teeth replacement in the esthetic area
LAMBERT, France ULg

Scientific conference (2013)

Esthetic results in dentistry are determined by the harmony between the dental prostheses and the soft tissues. To reach an optimal result, each single step of the treatment has a great importance, from ... [more ▼]

Esthetic results in dentistry are determined by the harmony between the dental prostheses and the soft tissues. To reach an optimal result, each single step of the treatment has a great importance, from the smile analyses to the final restoration delivery. The goal of this lecture is to describe how to elaborate a treatment planning for single and multiple tooth replacement in the aesthetic zone. A decision tree for the surgical protocols will be proposed according to our clinical experience at the university of Liège and, the current scientific evidences. The overall objective is, from an initial clinical situation, to determine the appropriate treatment approach and timing. The following scientific aspects will be developed: - The biological concept of extraction socket preservation. The use of biomaterials for alveolar bone augmentation or socket preservation. The goal is to clarify properties of the mostly used biomaterial in dentistry, as well as determine their clinical indications and limitations. Soft tissue management around teeth and implant [less ▲]

Detailed reference viewed: 18 (0 ULg)
See detailDecision making for tooth replacement in the esthetic zone
LAMBERT, France ULg

Conference (2012, October 06)

Aesthetic results in implantology are determined by the harmony between the dental prostheses and the soft tissues. To reach an optimal result, each single step of the treatment has a great importance ... [more ▼]

Aesthetic results in implantology are determined by the harmony between the dental prostheses and the soft tissues. To reach an optimal result, each single step of the treatment has a great importance, from the smile analyses to the final restoration delivery. The goal of this lecture is to describe how to elaborate a treatment planning for single and multiple tooth replacement in the aesthetic zone. A decision tree for the surgical protocols will be proposed according to our clinical experience at the university of Liège and, the current scientific evidences. The biological concept of the use of biomaterial in extraction socket preservation and bone regeneration will be also discussed. The overall objective is, from an initial clinical situation, to determine the appropriate treatment approach. [less ▲]

Detailed reference viewed: 6 (2 ULg)
See detailDecision making in noisy bistable switches A local analysis for non local predictions
Trotta, Laura ULg; Bullinger, Eric ULg; Sepulchre, Rodolphe ULg

Conference (2012, March)

In this paper, we try to estimate some statistics about the decision making process in a bistable model submitted to noise by studying the local properties of the system around an hyperbolic saddle point ... [more ▼]

In this paper, we try to estimate some statistics about the decision making process in a bistable model submitted to noise by studying the local properties of the system around an hyperbolic saddle point. Despite the fact that the saddle is not an equilibrium point of the stochastic system, we show that a local approach is still instructive. Under appropriate assumptions, the system can be reduced to an Orsntein-Uhlenbeck process whose dynamics depend on the properties of the saddle point. Yet, Orstein-Uhlenbeck processes have been used to study decision making under uncertainty in a broad variety of fields including statistics and cognitive neurosciences . [less ▲]

Detailed reference viewed: 23 (3 ULg)
Full Text
Peer Reviewed
See detailDecision making numerical tools for the rehabilitation of hydraulic structures - Application to the Nisramont dam in Belgium
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of the ICOLD 22th Congress (2006)

In the global framework of climate change, hydraulic structures rehabilitation is an up-to-date subject requiring appropriate design and impact studies. In this scope, upgrading the release facilities of ... [more ▼]

In the global framework of climate change, hydraulic structures rehabilitation is an up-to-date subject requiring appropriate design and impact studies. In this scope, upgrading the release facilities of dams is an important point since any badly controlled rise of water level in the reservoir leads usually to both up and downstream consequences, often irreversible. Suitable numerical models, coupled with contemporary computational possibilities, allow today engineers to forecast the complex situations induced on real structures by extreme events with increasing representativeness and accuracy. In this field, WOLF software, a process oriented free surface flows computation package completely set up by the HACH team, has proved its efficiency and reliability for years through numerous theoretical, experimental as well as on real structures applications. In this paper, the rehabilitation study of the Nisramont dam (Belgium) is presented. Located on the Ourthe River, a few kilometers upstream of the town of La Roche, this 21-meter high dam came into service in 1958 and was, in a first time, dedicated to be used as a cofferdam during the construction of a downstream larger reservoir of 250 hm³. But this second dam was never built and Nisramont became a definitive reservoir of 3 hm³ assuming the drinking water supply of a large part of the population of the south of Belgium and producing hydro-electricity. Due to its temporary primary tasks, the stilling basin downstream of the three 12.5 m large notches of the crest spillway has been designed for a short time use. Similarly, the 3 bottom outlets have never been equipped with valves and are thus unusable for the reservoir management. In order to secure the structure and to make it comply with its definitive working objectives, while taking into account climate change observations, the Ministère wallon de l’Equipement et des Transport (MET) - Direction des barrages de l’Est (D. 241) entrusted the HACH with evaluating up to date critical flood discharges and with designing a system in accord with these new values for the rehabilitation of the bottom outlets and the evacuation of the floods to the downstream river. This study has mainly been carried out using software of the WOLF package, successively applied to model really observed extreme events on the structure, to define new peak flow discharge and to design the stilling basin. [less ▲]

Detailed reference viewed: 60 (8 ULg)
Full Text
See detailA decision making tool to manage storm damage in Wallonia
Riguelle, Simon; Hebert, Jacques ULg; Jourez, Benoît

in Mayer, Helmut; Schindler, Dirk (Eds.) Proceedings of the 2nd International Conference. Wind Effects on Trees (2009)

In order to efficiently manage post-storm damages, a software was developed to be used as a decision support system by the public authorities in order to take the best decisions as soon as possible after ... [more ▼]

In order to efficiently manage post-storm damages, a software was developed to be used as a decision support system by the public authorities in order to take the best decisions as soon as possible after a storm event. This tool provides an overview of the present situation and compares the efficiency of several prospective simulations. The model was built on the basis of previous storm events in Europe and its parameters were defined after a comprehensive literature review. The System Dynamics theory was used to simulate the complex scheme of post-storm management operations (inventory, sale, harvesting, transport, storage and transformation). The operator can modify thirty parameters to simulate the crisis situation. [less ▲]

Detailed reference viewed: 12 (6 ULg)
Full Text
Peer Reviewed
See detailA decision making tool to manage storm damage in Wallonia.
Riguelle, Simon; Hebert, Jacques ULg; Jourez, Benoît ULg

in Mayer, Helmut; Schindler, Dirk (Eds.) Berichte des Meteorologischen Instituts der Albert-Ludwigs-Universität Freiburg (2009)

In order to efficiently manage post-storm damages, a software was developed to be used as a decision support system by the public authorities in order to take the best decisions as soon as possible after ... [more ▼]

In order to efficiently manage post-storm damages, a software was developed to be used as a decision support system by the public authorities in order to take the best decisions as soon as possible after a storm event. This tool provides an overview of the present situation and compares the efficiency of several prospective simulations. The model was built on the basis of previous storm events in Europe and its parameters were defined after a comprehensive literature review. The System Dynamics theory was used to simulate the complex scheme of post-storm management operations (inventory, sale, harvesting, transport, storage and transformation). The operator can modify thirty parameters to simulate the crisis situation. [less ▲]

Detailed reference viewed: 26 (18 ULg)
Full Text
See detailA decision problem for ultimate periodicity in non-standard numeration systems
Charlier, Emilie ULg

Conference (2012, July)

In the first part of the talk, I will overview some results on state complexity of ultimately periodic sets in various numeration systems. In the second part of the talk, I will present some applications ... [more ▼]

In the first part of the talk, I will overview some results on state complexity of ultimately periodic sets in various numeration systems. In the second part of the talk, I will present some applications of these methods to the following decidability question: given a DFA recognizing a set of integers represented in a fixed numeration system, decide whether this set is ultimately periodic. The techniques presented in this talk could be extended to other classes of sets of integers, and thus, could be applied to new decidability questions. [less ▲]

Detailed reference viewed: 14 (2 ULg)
Full Text
See detailA decision problem for ultimately periodic sets in non-standard numeration systems
Charlier, Emilie ULg

Conference (2008, May)

We consider the following decidability problem: Given a linear numeration system U and a set X ⊆ N such that rep_U(X) is recognized by a (deterministic) finite automaton. Is it decidable whether or not X ... [more ▼]

We consider the following decidability problem: Given a linear numeration system U and a set X ⊆ N such that rep_U(X) is recognized by a (deterministic) finite automaton. Is it decidable whether or not X is ultimately periodic, i.e., whether or not X is a finite union of arithmetic progressions? In this work, we give a decision procedure for this problem whenever U is a linear numeration system such that N is U -recognizable and satisfying a relation of the form U_{i+k} = a_1 U_{i+k−1} + · · · + a_k U_i with a_k = ±1 (the main reason for this assumption is that 1 and −1 are the only two integers invertible modulo n for all n ≥ 2). [less ▲]

Detailed reference viewed: 17 (4 ULg)