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See detailAnaerobic methane oxidation and aerobic methane production in an east African great lake (Lake Kivu)
Roland, Fleur ULiege; Morana, Cédric; Darchambeau, François et al

in Journal of Great Lakes Research (2018)

We investigated CH4 oxidation in the water column of Lake Kivu, a deep meromictic tropical lake with CH4-rich anoxic deep waters. Depth profiles of dissolved gases (CH4 and N2O) and a diversity of ... [more ▼]

We investigated CH4 oxidation in the water column of Lake Kivu, a deep meromictic tropical lake with CH4-rich anoxic deep waters. Depth profiles of dissolved gases (CH4 and N2O) and a diversity of potential electron acceptors for anaerobic CH4 oxidation (NO3−, SO4 2−, Fe and Mn oxides) were determined during six field campaigns between June 2011 and August 2014. Denitrification measurements based on stable isotope labelling experiments were performed twice. In addition, we quantified aerobic and anaerobic CH4 oxidation, NO3− and SO4 2− consumption rates,with and without the presence of an inhibitor of SO4 2−-reducing bacteria activity. Aerobic CH4 production was also measured in parallel incubations with the addition of an inhibitor of aerobic CH4 oxidation. Themaximu m aerobic and anaerobic CH4 oxidation rates were estimated to be 27±2 and 16±8 μmol/L/d, respectively. We observed a difference in the relative importance of aerobic and anaerobic CH4 oxidation during the rainy and the dry season, with a greater role for aerobic oxidation during the dry season. Lower anaerobic CH4 oxidation rates were measured in presence of molybdate in half of the measurements, suggesting the occurrence of linkage between SO4 2− reduction and anaerobic CH4 oxidation. NO3− consumption and dissolved Mn production rates were never high enough to sustain themeasured anaerobic CH4 oxidation, reinforcing the idea of a coupling between SO4 2− reduction and CH4 oxidation in the anoxic waters of Lake Kivu. Finally, significant rates (up to 0.37 μmol/L/d) of pelagic CH4 production were also measured in oxygenated waters. [less ▲]

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See detailEffects of Fertilizer use on Potato Production in Western Rwanda
Maniriho, Aristide ULiege; Habyarimana, Cyprien

in East African Journal of Science and Technology (2018), 8(2), 28-45

This study analysed the effects of fertilizer use on potato production in Kabatwa Sector, Nyabihu District, in Western Rwanda. Data were collected among 100 potato growers randomly selected in Kabatwa ... [more ▼]

This study analysed the effects of fertilizer use on potato production in Kabatwa Sector, Nyabihu District, in Western Rwanda. Data were collected among 100 potato growers randomly selected in Kabatwa sector for the season 2014B. A well structured questionnaire was distributed in August 2014, and required information about the respondent’s identification, fertilizer use, potato production and related constraints. The paired-samples T-test was used for data analysis. The results show that fertilizers have positive effects on potato output. The results from the paired-samples t-test show that the difference between the average crop production after and the average crop production before the adoption of fertilizers in the study area (1,155 kgs) is statistically different from zero following that the corresponding p-value (labelled Sig. 2-tailed) is smaller than 0.05. Accordingly, there has been a statistically significant difference between the potato output level comparing before and after fertilizer use in the study area. It was recommended that the Government should enhance fertilizer accessibility through credit facility to farmers, facilitate access to proximity extension services and encourage farmers to group into cooperatives. [less ▲]

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See detailEntanglement robustness against particle loss in multiqubit systems
Neven, Antoine ULiege; Martin, John ULiege; Bastin, Thierry ULiege

in Physical Review. A (2018), 98

When some of the parties of a multipartite entangled pure state are lost, the question arises whether the residual mixed state is also entangled, in which case the initial entangled pure state is said to ... [more ▼]

When some of the parties of a multipartite entangled pure state are lost, the question arises whether the residual mixed state is also entangled, in which case the initial entangled pure state is said to be robust against particle loss. In this paper, we investigate this entanglement robustness for N-qubit pure states. We identify exhaustively all entangled states that are fragile, i.e., not robust, with respect to the loss of any single qubit of the system. We also study the entanglement robustness properties of symmetric states and put these properties in the perspective of the classification of states with respect to stochastic local operations assisted with classic communication (SLOCC classification). [less ▲]

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See detailIndoor thermal comfort in residential building stock: A study of RCC houses in Quetta, Pakistan
Mahar, Waqas Ahmed ULiege; Attia, Shady ULiege

Report (2018)

The report is a part of the PhD project entitled “Methodology for the design of climate responsive houses for optimised thermal comfort in Quetta, Pakistan” being carried out at University of Liège ... [more ▼]

The report is a part of the PhD project entitled “Methodology for the design of climate responsive houses for optimised thermal comfort in Quetta, Pakistan” being carried out at University of Liège, Belgium. The aim of the project is to improve indoor thermal comfort of free-running houses in Quetta and raise the awareness of builders about climate sensitivity. The present findings are based on the monitoring of indoor climate, survey questionnaire and the interviews of the residents living in the houses made of reinforced cement concrete (RCC) structure. We aim to provide the readers with insights and perspectives on the existing houses, their comfort performance, comfort perception and understanding of the residents and the use of mechanical methods to optimise thermal comfort in RCC houses in Quetta, Pakistan. [less ▲]

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See detailLa péninsule coréenne: un enjeu international permanent?
Santander, Sébastian ULiege

Conference given outside the academic context (2018)

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See detailClassification of load forecasting studies by forecasting problem to select load forecasting techniques and methodologies
Dumas, Jonathan ULiege; Cornélusse, Bertrand ULiege

E-print/Working paper (2018)

This article proposes a two-dimensional classification methodology to select the relevant forecasting tools developed by the scientific community based on a classification of load forecasting studies. The ... [more ▼]

This article proposes a two-dimensional classification methodology to select the relevant forecasting tools developed by the scientific community based on a classification of load forecasting studies. The inputs of the classifier are the articles of the literature and the outputs are articles classified into categories. The classification process relies on two couple of parameters that defines a forecasting problem. The temporal couple is the forecasting horizon and the forecasting resolution. The system couple is the system size and the load resolution. Each article is classified with key information about the dataset used and the forecasting tools implemented: the forecasting techniques (probabilistic or deterministic) and methodologies, the cleansing data techniques and the error metrics. This process is illustrated by reviewing and classifying thirty-four articles. [less ▲]

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See detailChronic cough in Pediatrics: Algorithms
KEMPENEERS, Céline ULiege

Speech/Talk (2018)

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See detailThoreau and the Capitalocene
Lombard, David ULiege

in Metacritic Journal for Comparative Studies and Theory (2018), 4(2), 20-34

This essay will serve the double purpose of investigating the esthetic dimensions of Thoreau’s environmental philosophy as depicted in his classic memoir Walden (1854) while examining the philosophical ... [more ▼]

This essay will serve the double purpose of investigating the esthetic dimensions of Thoreau’s environmental philosophy as depicted in his classic memoir Walden (1854) while examining the philosophical and political implications of its tendency to break down the boundaries between the natural and the technological landscape. Although critics have tended to identify Thoreau as deeply rooted in an Emersonian transcendentalist and idealist tradition viewing nature as an organized and holistic “whole”, I will argue that Thoreau’s ecophilosophy seeks to reconcile the idealistic with the empirical pole and highlight the tensions between natural and technological objects and situations. I will start by studying how Thoreau approaches man-made technologies and develops a proto-ecocritical form of the sublime. I will also argue that a reconsideration of Thoreau’s poetics sheds a new light on the goals of environmental (non)fiction and urges us to redefine the concept of the Anthropocene as the Capitalocene. [less ▲]

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See detailDroit économique européen et systèmes de pension : quelles interactions pour quelle influence ?
Detienne, Quentin ULiege

Scientific conference (2018, December 20)

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See detailGestão de museus: o museu do século XXl
Duarte Cândido, Manuelina Maria ULiege

in Vilela, Sheila Elias (Ed.) O Museu e Seus Saberes (2018)

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See detailApontamentos sobre a responsabilidade social dos museus: ecomuseus e museus comunitários
Duarte Cândido, Manuelina Maria ULiege

in Vilela, Sheila Elias (Ed.) O Museu e Seus Saberes (2018)

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See detailAppréhender l'étude du verre du Tempio dei Fabri Navales et de la Schola del Traiano
Dienst, Simon ULiege; Frère, Géraldine ULiege

Conference (2018, December 19)

Since 2014, Géraldine Frère and Simon Dienst have been studying the glass artifacts found respectively in the Tempio dei Fabri Navales and the Schola del Traiano areas. The first excavation, conducted ... [more ▼]

Since 2014, Géraldine Frère and Simon Dienst have been studying the glass artifacts found respectively in the Tempio dei Fabri Navales and the Schola del Traiano areas. The first excavation, conducted by Cl. De Ruyt and the University of Namur, took place between 1992 and 2005. Since then, the study of archaeological material has been in progress. The second excavation campaign was led by Cl. Krause and L. Chrzanovski with a Genevan team between 1997 and 1998, then by J.-M. Moret and Th. Morard at the University of Lyon 2 between 2002 and 2010, while the post-excavation work is the responsibility of the University of Liège. These glass studies are supported by the Research Unit “Art, Archéologie et Patrimoine” of the University of Liege. Although different, both methods are based on the mixed use of quantification and typology as well as the observation of the archaeological context. However, different finalities brought minor methodological differences. Geraldine Frere’s study is focused on the technical study, archaeometric and conservation-restauration data, while Simon Dienst’s examines the relations between glassware and pottery. The main aim of this communication is to introduce our methodologies with a chronological presentation of the glass from both excavations. Indeed, these studies show a complementary range of dating between the Late Republican period and Late Antiquity. Furthermore, they bring a lot of economical, technological and cultural information about the evolution of glass, while considering the particularities linked to the antique city of Ostia. Finally, these studies contribute to the publication of archaeological glasses in stratigraphical context. Unlike ceramics, glass from archaeological excavations is rarely published or in brief terms (except for tombs), although it has been gradually gaining interest in recent decades. [less ▲]

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See detailEnhancement of skin penetration of lipid-based nanocarriers
Bellefroid, Coralie ULiege; Lechanteur, Anna ULiege; Evrard, Brigitte ULiege et al

Scientific conference (2018, December 19)

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See detailSelf-testing in infectiology: is it the future?
Hayette, Marie-Pierre ULiege

Conference (2018, December 19)

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See detailHot melt extrusion as a solvent-free technique for the formation of a polymeric amorphous solid dispersion of atorvastatin
Jennotte, Olivier ULiege; Koch, Nathan ULiege; Collard, Laurence ULiege et al

Scientific conference (2018, December 19)

Water-solubility enhancement of atorvastatin using the hot melt extrusion for the production of a polymeric amorphous solid dispersion

Detailed reference viewed: 26 (12 ULiège)
See detailGérer ses références bibliographiques avec ZOTERO
Cordier, Quentin ULiege; Desseilles, François ULiege

Scientific conference (2018, December 19)

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See detailSFC-MS for the quality control of cannabis: addressing the potential adulteration with synthetic cannabinoids
Jambo, Hugues ULiege; Dispas, Amandine ULiege; Avohou, Tonakpon Hermane ULiege et al

Scientific conference (2018, December 19)

Recent years have been the stage to a shift in cannabis policies and trends that have impacted cannabis usage and public perception. On the other hand, there has also been a rise in the development and ... [more ▼]

Recent years have been the stage to a shift in cannabis policies and trends that have impacted cannabis usage and public perception. On the other hand, there has also been a rise in the development and distribution of synthetic cannabinoids which are synthetic compounds that also act on the endocannabinoid receptors. They are mostly used as recreational drugs and because their potency and toxicity are not always known, they can lead to severe adverse effects after consumption. The detection of cannabis counterfeiting with synthetic cannabinoids is essential to produce safe cannabis-based medicines and we aimed to develop a generic supercritical fluid chromatography hyphenated to mass spectrometry (SFC-MS) method that could help in detecting such adulterations using representative synthetic cannabinoids from multiple classes. Method development started with a screening of stationary phases using seven different SFC-dedicated columns. Then, an optimization following analytical quality-by-design principles was performed followed by an assessment of the quantitative performances with a validation according to the total-error strategy. This innovative tool should prove useful in the context of counterfeit drugs tracking in the challenges to come. [less ▲]

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See detailARGOS at the LBT. Binocular laser guided ground layer adaptive optics
Rabien, S.; Angel, R.; Barl, L. et al

in Astronomy and Astrophysics (2018), 621

Having completed its commissioning phase, the Advanced Rayleigh guided Ground-layer adaptive Optics System (ARGOS) facility is coming online for scientific observations at the Large Binocular Telescope ... [more ▼]

Having completed its commissioning phase, the Advanced Rayleigh guided Ground-layer adaptive Optics System (ARGOS) facility is coming online for scientific observations at the Large Binocular Telescope (LBT). With six Rayleigh laser guide stars in two constellations and the corresponding wavefront sensing, ARGOS corrects the ground-layer distortions for both LBT 8.4 m eyes with their adaptive secondary mirrors. Under regular observing conditions, this set-up delivers a point spread function (PSF) size reduction by a factor of 2–3 compared to a seeing-limited operation. With the two LUCI infrared imaging and multi-object spectroscopy instruments receiving the corrected images, observations in the near-infrared can be performed at high spatial and spectral resolution. We discuss the final ARGOS technical set-up and the adaptive optics performance. We show that imaging cases with ground-layer adaptive optics (GLAO) are enhancing several scientific programmes, from cluster colour magnitude diagrams and Milky Way embedded star formation, to nuclei of nearby galaxies or extragalactic lensing fields. In the unique combination of ARGOS with the multi-object near-infrared spectroscopy available in LUCI over a 4 × 4 arcmin field of view, the first scientific observations have been performed on local and high-z objects. Those high spatial and spectral resolution observations demonstrate the capabilities now at hand with ARGOS at the LBT. [less ▲]

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See detailDevelopment of graphical user interface (GUI) for database building and for falsification applications
Coic, Laureen ULiege; Sacre, Pierre-Yves ULiege; Dispas, Amandine ULiege et al

Scientific conference (2018, December 19)

Inside a research unit, there are several kind of information which are gathered in a continuous flow from operators. It is important to centralize all of the information not to lose any interesting ... [more ▼]

Inside a research unit, there are several kind of information which are gathered in a continuous flow from operators. It is important to centralize all of the information not to lose any interesting result. Because of the cost and/or the non-applicability of commercial database software, it is interesting to build its own one. Indeed, in the case of spectroscopic data, the use of a market database software is not user-friendly because, stored data cannot be directly manipulated in multivariate analyses applications. The database under development actually contains the data of various pharmaceutical samples (genuine and falsified) obtained on several spectroscopic devices. For this application, a Matlab® graphical user interface (GUI) is being developed. It provides the access to spectroscopic data for any operator and allows the automatic implementation of new instruments and/or new formulation groups. Moreover, in case of falsification suspicion, another GUI has been developed to provide qualitative information regarding the composition of the medicines. It is an interesting tool because it provides an instantaneously visual comparison between reference database and the unknown spectrum. Moreover, statistical tools, as Hit Quality Index or correlation coefficient, can provide a numerical result to quantify the match between spectra. In the future, results from other kind of techniques (e.g. HPLC, dissolution curves, photos) will be added to centralize samples information. [less ▲]

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