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See detailThe role of natural hazards and human activities on change of sedimentation patterns: The case of Lake Yamanaka (Fuji Five Lakes, Japan)
Lamair, Laura ULg; Hubert, Aurelia ULg; El Ouahabi, Meriam ULg et al

Conference (2017, April 10)

The last eruption of Mt Fuji (Japan) occurred in A.D. 1707. The eruption lasted 16 days from 16 December 1707 to 1 January 1708 (Tsuya, 1955) and 1.8 km3 of volcanic materials were ejected in total ... [more ▼]

The last eruption of Mt Fuji (Japan) occurred in A.D. 1707. The eruption lasted 16 days from 16 December 1707 to 1 January 1708 (Tsuya, 1955) and 1.8 km3 of volcanic materials were ejected in total (Miyaji et al., 2011). Lake Yamanaka, a very shallow lake (max. 14. 3 m depth) located at the foot of the east-north-eastern flank of Mt Fuji, was heavily impacted by the eruption. A thick scoria layer entirely covered the catchment of Lake Yamanaka. The thickness of the deposit varies from 5 to 37 cm around Lake Yamanaka and reaches up to 149 cm at the south-west extremity of the catchment (Miyaji et al., 2011). In order to study the influence of Hoei eruption on Lake Yamanaka, 5 gravity cores were taken during the 2014 QuakeRecNankai campaign. The Hoei scoria was present at the bottom of the one core and in the core catcher of the four other cores. High resolution magnetic susceptibility, XRD, XRF, LOI, C/N and 210Pb/137Cs analyses were performed on the gravity cores. The results shows three distinct periods of sedimentation: (1) From Hoei eruption to A.D. 1900; (2) From A.D. 1900 to A.D. 1990; (3) From A.D. 1990 to A.D. 2014. The first period is characterized by a very low sedimentation rate (~0.07 cm/yr). During this period, the sediments of the catchment were trapped below the thick Hoei scoria layer. However, peaks of terrigenous input are recorded. We link such detrical signals with violent typhoons that hit the Fuji Five Lakes region. The water from the heavy rains percolated through the porous thick scoria layer and saturated it. As a result, surface runoffs carried the sediments from the catchment into Lake Yamanaka. The second period (from A.D. 1900 to A.D. 1990) is defined by an increase of the sedimentation rate (~0.16 cm/yr). The development of soil and the agriculture (e.g. pastureland, rice field, mulberry plantations) reduced the impact of Hoei scoria. The terrigenous inputs are higher than previously but remained more or less constant during this period of time. As the thickness of the scoria layer is partially reduced or covered by new soil, rains triggered by smaller typhoons could drain the sediments from watershed and transport them into the lake. The most recent period representing the last 27 years is characterized by a very high sedimentation rate (~1.036 cm/yr). The transition between period 2 and period 3 corresponds to the development of mass tourism and the urbanization around Lake Yamanaka. It is marked by an increasing of atmospheric pollution (Pb, Zn). In the upper part of the cores, a peak of 137Cs is observed. Such peak is related to cesium fall-out after Fukushima incident in 2011. In addition to the fingerprint of human impact, the lake also record a terrigenous signal related to the 2007 Fitow typhoon which provoked damage in the area. This study highlights the influence of eruptions and typhoons on the sedimentation of Lake Yamanaka. In the present day, the sedimentation recovery after a major eruption is accelerated by human activity. References: Miyaji N., Kan'no A., Kanamaru T., Mannen K. 2011. High-resolution reconstruction of the Hoei eruption (AD 1707) of Fuji volcano, Japan. Journal of Volcanology and Geothermal Research 207, 113–129. Tsuya, H. 1955. Geological and petrological studies of volcano, Fuji, V.: 5. on the 1707 eruption of Volcano Fuji. Bulletin of the Earthquake Research Institute 33, 341–383. [less ▲]

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See detailPelvic anatomy, a constructive approach
Bonnet, Pierre ULg

Scientific conference (2017, April 10)

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See detailPelvic ureter
Bonnet, Pierre ULg

Scientific conference (2017, April 10)

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See detailTopographic anatomy of the pelvic vessels
Bonnet, Pierre ULg

Scientific conference (2017, April 10)

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See detailUnguiculin A and Ptilomycalins E-H, Antimalarial Guanidine Alkaloids from the Marine Sponge Monanchora unguiculata.
Campos, Pierre-Eric; Wolfender, Jean-Luc; Quieroz, Emerson F. et al

in Journal of Natural Products (2017), 80

Chemical study of the CH2Cl2-MeOH (1:1) extract from the sponge Monanchora unguiculata collected in Madagascar highlighted five new compounds, one acyclic guanidine alkaloid, unguiculin A (1) and four ... [more ▼]

Chemical study of the CH2Cl2-MeOH (1:1) extract from the sponge Monanchora unguiculata collected in Madagascar highlighted five new compounds, one acyclic guanidine alkaloid, unguiculin A (1) and four pentacyclic alkaloids, ptilomycalins E-H (2-5), along with four known compounds: crambescidin 800 (6) and crambescidin 359 (7), crambescidic acid (8), and fromiamycalin (9). Their structures were elucidated by 1D and 2D NMR spectra and HRESIMS data. All compounds were evaluated for their cytotoxicity against KB cells and their antiplasmodial activity. The new ptilomycalin E (2) and the mixture of the new ptilomycalins G (4) and H (5) showed promising cytotoxicity against KB cells with IC50 values of 0.85 and 0.92 μM, respectively. Ptilomycalin F (3) and fromiamycalin (9) exhibited promising activity against Plasmodium falciparum with IC50 values of 0.23 and 0.24 μM, respectively [less ▲]

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See detailRevista "Esfera pública discursiva"
Becerra Mayor, David ULg

in Esfera pública discursiva (2017), 1

Número 1 de la revista de crítica e información literaria realizada por las y los estudiantes de "Stylistique et critique de l’espagnol moderne" del curso 2016-2017, de la Université de Liège.

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See detailTowards Knowledge management in General Practice & Family Medicine; Guide to the indexing of master thesis.
Jamoulle, Marc ULg

Learning material (2017)

The Francophone Coordination Center for Training in General Practice (CCFFMG) (www.ccffmg.be)(French) is in charge of organizing the public release of the End-of-Study works (Master thesis) in General ... [more ▼]

The Francophone Coordination Center for Training in General Practice (CCFFMG) (www.ccffmg.be)(French) is in charge of organizing the public release of the End-of-Study works (Master thesis) in General Practice/Family Medicine (GP/FM) . This work is carried out at the end of the Master of Specialty of the Departments of General Practice of the Free University of Brussels (ULB), the Catholic University of Louvain (UCL) and the University of Liège (ULg). A dedicated website (www.mgtfe.be) offers an online copywriting guide. This site provides also a description and instruction manual for a GP/FM indexing system discussed in this document. This experimental system, based on the assembly of the International Classification of Primary Care, second version (ICPC-2), and a new contextual classification called Q-Codes version 2.5 is intended to help the manual indexation of the Master Thesis. The package, called Core Content Classification in GP/FM (3CGP), is now available in 8 languages (en-fr-nl-es-pt-vi-ko-tr) on the multilingual web site of Department of Medical Information and Medical Informatics (B2IM) of the University of Rouen (www.hetop.eu/q) together with a companion site (http://3cgp.woncaeurope.org) (in English). Family physician will be asked to choose a number of proposed codes to index their jobs at the time of online filing. The publishing site will be equipped with a search module based on the 3CGP indexing system. An evaluation of the system of indexing by the users is organized. [less ▲]

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See detailLe sens de la vue et le sens de la marche. Déambulation et signification dans l'œuvre de Marc-Antoine Mathieu
Belloi, Livio ULg

Conference (2017, April 08)

Dans la foulée de l'ouvrage publié par Ian Hague ("Comics and the Senses", Routledge, 2014), cette conférence aborde la double question du sens et des sens dans le domaine de la bande dessinée ... [more ▼]

Dans la foulée de l'ouvrage publié par Ian Hague ("Comics and the Senses", Routledge, 2014), cette conférence aborde la double question du sens et des sens dans le domaine de la bande dessinée contemporaine, en se concentrant d'abord sur l'œuvre de Marc-Antoine Mathieu. Chemin faisant, l'œuvre de Mathieu se voit mise en regard avec "La Différence invisible" (2016) de Julie Dachez et Mademoiselle Caroline. [less ▲]

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See detailModellierung der chemischen Kinetik. Entwicklung eines Verständnisses auf molekularer Ebene anhand gezielter Versuche
Nihant, Brigitte ULg; Karous, Hamad ULg; Leyh, Bernard ULg

Conference (2017, April 08)

Damit die Lernenden als zukünftige verantwortliche Bürger eine authentische Vision der Wissenschaft und ihrer Grenzen gewinnen, heben die Rahmen- und Lehrpläne immer mehr die Notwendigkeit hervor, sie mit ... [more ▼]

Damit die Lernenden als zukünftige verantwortliche Bürger eine authentische Vision der Wissenschaft und ihrer Grenzen gewinnen, heben die Rahmen- und Lehrpläne immer mehr die Notwendigkeit hervor, sie mit wissenschaftlichen Modellen und derer Erarbeitung vertraulich zu machen. Die chemische Kinetik bietet einen günstigen Rahmen, solche Modellierungskompetenzen zu fördern. Das didaktische Ziel kann wie folgt zusammengefasst werden: Eine chemische Reaktion als das Resultat wirksamer Stöße zwischen Molekülen beschreiben, um den Einfluss verschiedener experimenteller Faktoren auf die Reaktionsgeschwindigkeit zu erklären. Dies verlangt eine Modellierung, bei der die vier Ebenen (empirisch, makroskopisch, symbolisch, mikroskopisch) des didaktischen Tetraeders von Kermen und Méheut (2009) (Chemistry Education Research and Practice, 10, 24-34) erörtert werden. In diesem Vortrag werden verschiedene Aktivitäten (z.B. Versuche über molekulare Diffusion, Einführung des Begriffes des Übergangszustandes anhand angepasster, selbstgebauter Molekülmodelle) präsentiert und didaktisch ausgewertet. Großes Gewicht wird darauf gelegt, dass die Lernenden sich der erklärenden Rolle der Modelle bewusst werden, dass ihre Autonomie gefördert wird, indem der Schwierigkeitsgrad der sogenannten Zone der nächsten Entwicklung (Wygotski) entspricht, und dass das vorgestellte didaktische Modellierungsverfahren die Denkweise der Wissenschaftler reflektiert. [less ▲]

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See detailSurgical management of ectopic ureters in dogs: clinical outcome and prognostic factors for long-term continence
Noël, Stéphanie ULg; Claeys, Stéphanie ULg; Hamaide, Annick ULg

in Veterinary Surgery : The Official Journal of the American College of Veterinary Surgeons (2017)

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See detailAnalysis of Migration in a Multi-Risk Context: Case of Bujumbura/Burundi
Nibigira, Léonidas ULg; Ozer, Pierre ULg; Havenith, Hans-Balder ULg

in MAIER, ROBIN; REVELL, MARK (Eds.) THE AMERICAN ASSOCIATION OF GEOGRAPHERS, 2017 Annual Meeting, April 5 - 9, 2017 Boston, Massachusetts / PROGRAM (2017, April 08)

Human mobility affects land use and human density distribution. Unfortunately, this rarely takes into account the real and potential changes induced by hazards on the natural systems. Thus, migration and ... [more ▼]

Human mobility affects land use and human density distribution. Unfortunately, this rarely takes into account the real and potential changes induced by hazards on the natural systems. Thus, migration and natural hazards should be constantly analyzed through cross-sectional and global studies to reduce disastrous consequences resulting from their mutual interactions. In a multi-risk and demographic sprawl context, the study focused on the cross-analysis of human density and natural hazards in Bujumbura. The results show that migration of people should ideally be guided by knowledge of the area's sensitivity to natural hazards, taking into account other parameters such as hazards susceptibility maps and production opportunities. While the migration of people toward overcrowded centers constitutes a big challenge, it is an important asset when it concerns areas in need of manpower. It also allows the balance in relieving saturated areas, reducing human pressure on the environment. Therefore, there is a need that policymakers comply with those aspects, finding the right balance for a better situation. [less ▲]

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See detailL'excuse est devenue une arme en politique
Grandjean, Geoffrey ULg

Article for general public (2017)

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See detailCovering codes
Vandomme, Elise ULg

Conference (2017, April 07)

Covering problems are traditional issues in mathematics. For instance, a natural covering problem in the n-dimensional euclidean space is to ask for the minimal number of identical spheres needed to cover ... [more ▼]

Covering problems are traditional issues in mathematics. For instance, a natural covering problem in the n-dimensional euclidean space is to ask for the minimal number of identical spheres needed to cover a large volume. The same issues can be considered in graphs. The corresponding covering problem is to determine the minimal number of r-balls that can be placed in such a way that every vertex of the graph is contained in at least one of them. In this talk, we consider coverings that satisfy special multiplicity conditions, called (r,a,b)-covering codes. These codes generalizes the notion of perfect codes in graphs that correspond to tilings of the graph with r-balls. We focus our attention on the multidimensional infinite grid and discuss the periodicity of (r,a,b)-codes in this case. Finally, for the dimension 2, we determine the possible values of the constant a and b. [less ▲]

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See detailOptimization of houseflies’ larvae production on pig wastes and brewers’ grains for integrated fish and pig farms in the tropics
Mafwila Kinkela, Patrick ULg; BWABWA, Denis; Kambashi Mutiaka, Bienvenu ULg et al

Conference (2017, April 07)

Improved maggot production of flies in integrated farm by farmers , using available by-product, on-farm wastes and agricultural stored wet can be an opportunity to provide an important additional source ... [more ▼]

Improved maggot production of flies in integrated farm by farmers , using available by-product, on-farm wastes and agricultural stored wet can be an opportunity to provide an important additional source of high quality protein and can intensify fish production. [less ▲]

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See detailEffects of various design parameters on system-level fire fragility functions for steel buildings
Elhami Khorasani, Negar; Gernay, Thomas ULg; Garlock, Maria

Conference (2017, April 07)

The existing literature in fire engineering is mostly based on single component study of structures, as opposed to system level building performance. In current practice, fire does not need to be ... [more ▼]

The existing literature in fire engineering is mostly based on single component study of structures, as opposed to system level building performance. In current practice, fire does not need to be considered as part of the structural design of the building. The required fire protection for steel components in a building is based on prescriptive design guidelines, which are based on standard fire tests on individual structural members. In addition, the fire-structure engineering has primary focused on deterministic analysis, while the field is moving towards performance-based design in recent years. Meanwhile, the scenarios leading to a fire event and the performance of the structure at elevated temperatures involve a great level of uncertainty. This work focuses on fire-structure interaction with the objective of developing fire fragility functions that capture fire damage uncertainty for the entire building (i.e., at the system-level). A fragility function provides the probability of exceeding a damage state for a given intensity measure of a given hazard. Fire fragility functions can be developed to measure the expected losses based on performance of a building structural system, rather than a single component. Different functions can be developed for buildings with different typologies (e.g. high-rise steel building with moment resisting frame, low rise steel building with bracing). This presentation derives fragility functions based on stochastic analyses of prototype buildings. In developing the fragility functions, uncertainties in the fire model, the heat transfer model and the thermo-mechanical response should be considered; but such a large number of random variables adds to the complexity of analysis and the computational time. Based on a sensitivity analysis for steel gravity frames, this work identifies the most important input parameters to be considered as random variables when developing fire fragility functions for an entire building. The sensitivity analysis for a multi-story steel building prototype is completed considering uncertainties at the compartment and building levels. At the compartment level, uncertainty in the fire scenario, compartment geometry, applied load, thermal and mechanical properties of steel and insulating materials are considered. At the building level, the influence of fire-resistance rating, building height, and occupancy type are studied. The results of this study identify the local and global parameters needed as part of deriving system-level fire fragility functions for a steel building. [less ▲]

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See detailMapping the impact of research-by-design : paths cleared by architectural experimentation
Joachim, Guillaume ULg

Conference (2017, April 07)

This paper aims at building a critical reflection on the valuation of design experimentation in architectural research and its impact on knowledge production. These considerations are rooted in the ... [more ▼]

This paper aims at building a critical reflection on the valuation of design experimentation in architectural research and its impact on knowledge production. These considerations are rooted in the observation of a hybrid and prospective research experience led at the University of Liège (Revisiting the apartment building 2015-2016), combining documentary research, field investigation, and a research-by-design international design studio gathering 40 architects and students in architecture. We first position the essay on the issue of harnessing design activity for the benefit of architectural research. Secondly we report on the investigation observed and the distinct knowledge production modalities involved in the project. The particular implication of the act of designing is highlighted, among other steps of the investigation, and we put forward some characteristic features of the research process. We particularly consider the different design techniques, tools and representational processes involved in four distinct architectural experimentations and their impact in the emergence of design strategies or spatial interventions. We finally open a discussion on the questions raised by the valuation of these proposals in the research, and stress the inherent tension between opening new perspectives and redefining the scope of inquiry. [less ▲]

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See detailComputerized adaptive testing: Principles, issues and implementation
Magis, David ULg

Scientific conference (2017, April 07)

Computerized adaptive testing (CAT) has become an important field of research for educational and psychological measurement. It provides tailored testing at the test taker level, focusing on the optimal ... [more ▼]

Computerized adaptive testing (CAT) has become an important field of research for educational and psychological measurement. It provides tailored testing at the test taker level, focusing on the optimal administration of the items to improve accuracy and precision in individual ability estimation. Yet, practical implementation of CAT programs are still demanding both in terms of item bank creation and calibration, and require appropriate online platforms and suitable algorithms for underlying psychometric computations. The purpose of this workshop is twofold: (a) to briefly introduce the concepts of item response theory (IRT) and CAT in a practical, end-user approach; (b) to present a package of the R software, called catR, that performs all underlying IRT- and CAT-related calculations. This package is also adequate to perform simulation studies, which are most useful to assess the quality of an item and help in designing efficient CATs. Some live demonstrations of catR will be proposed to conclude the workshop. participants are invited to bring their laptops with R and RStudio software pre-installed. Electronic copies of the presentation and an R script with the code for illustrative examples will be provided. [less ▲]

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See detailPhenomenological Analysis of Existentialist Novels: Body, Emotion, Perception
Franck, Thomas ULg

Conference (2017, April 07)

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See detailThe potential of non-invasive electrical techniques for agricultural  experiments
Garré, Sarah ULg

Scientific conference (2017, April 06)

Detailed reference viewed: 22 (10 ULg)