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See detailThe far-ultraviolet main auroral emission at Jupiter – Part 1: Dawn–dusk brightness asymmetries
Bonfond, Bertrand ULiege; Gustin, Jacques ULiege; Gérard, Jean-Claude ULiege et al

in Annales Geophysicae (2015), 33

The main auroral emission at Jupiter generally appears as a quasi-closed curtain centered around the magnetic pole. This auroral feature, which accounts for approximately half of the total power emitted ... [more ▼]

The main auroral emission at Jupiter generally appears as a quasi-closed curtain centered around the magnetic pole. This auroral feature, which accounts for approximately half of the total power emitted by the aurorae in the ultraviolet range, is related to corotation enforcement currents in the middle magnetosphere. Early models for these currents assumed axisymmetry, but significant local time variability is obvious on any image of the Jovian aurorae. Here we use far-UV images from the Hubble Space Telescope to further characterize these variations on a statistical basis. We show that the dusk side sector is ~ 3 times brighter than the dawn side in the southern hemisphere and ~ 1.1 brighter in the northern hemisphere, where the magnetic anomaly complicates the interpretation of the measurements. We suggest that such an asymmetry between the dawn and the dusk sectors could be the result of a partial ring current in the nightside magnetosphere. [less ▲]

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See detailThe far-ultraviolet main auroral emission at Jupiter – Part 2: Vertical emission profile
Bonfond, Bertrand ULiege; Gustin, Jacques ULiege; Gérard, Jean-Claude ULiege et al

in Annales Geophysicae (2015), 33

The aurorae at Jupiter are made up of many different features associated with a variety of generation mechanisms. The main auroral emission, also known as the main oval, is the most prominent of them as ... [more ▼]

The aurorae at Jupiter are made up of many different features associated with a variety of generation mechanisms. The main auroral emission, also known as the main oval, is the most prominent of them as it accounts for approximately half of the total power emitted by the aurorae in the ultraviolet range. The energy of the precipitating electrons is a crucial parameter to characterize the processes at play which give rise to these auroral emissions, and the altitude of the emissions directly depends on this energy. Here we make use of far-UV (FUV) images acquired with the Advanced Camera for Surveys on board the Hubble Space Telescope and spectra acquired with the Space Telescope Imaging Spectrograph to measure the vertical profile of the main emissions. The altitude of the brightness peak as seen above the limb is ~ 400 km, which is significantly higher than the 250 km measured in the post-dusk sector by Galileo in the visible domain. However, a detailed analysis of the effect of hydrocarbon absorption, including both simulations and FUV spectral observations, indicates that FUV apparent vertical profiles should be considered with caution, as these observations are not incompatible with an emission peak located at 250 km. The analysis also calls for spectral observations to be carried out with an optimized geometry in order to remove observational ambiguities. [less ▲]

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See detailA Far-UV Imager for the Jupiter Ganymede Orbiter
Bunce, E. J.; Molyneux, P.; Bannister, N. et al

Poster (2010, May 17)

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See detailThe far-UV spectrum of the low-excitation planetary nebula HD 138403
Surdej, Jean ULiege; Heck, A.

in Astronomy and Astrophysics (1982), 116

Two high-resolution far-UV spectra of the low-excitation planetary nebula HD 138403 are analyzed which were obtained with the IUE satellite over the wavelength range from 1170 to 2070 A. It is shown that ... [more ▼]

Two high-resolution far-UV spectra of the low-excitation planetary nebula HD 138403 are analyzed which were obtained with the IUE satellite over the wavelength range from 1170 to 2070 A. It is shown that the nebula's far-UV spectrum comprises a stellar continuum on which are superimposed a few emission lines, numerous interstellar absorption lines, and various types of P Cygni profiles. Evidence is examined for substantial mass loss from the central nucleus, with terminal velocities of the order of 800 km/s. The observed nebular emissions are used to derive the electron density in the main nebula. The results are taken as supporting the hypothesis that a bipolar structure is expanding around HD 138403 via a selective radiation process involving an edge- or line-locking mechanism or both. [less ▲]

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See detailFaraday instability at foam/water interface
Bronfort, Ariane ULiege; Hervé, Caps

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2012)

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See detailFaraday instability on a network
Delon, Giles ULiege; Terwagne, Denis ULiege; Adami, Nicolas ULiege et al

in Chaos (2010)

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See detailFaraday instability on a network
Delon, Giles ULiege; Terwagne, Denis ULiege; Adami, Nicolas ULiege et al

Poster (2010, March)

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See detailFaraday rotation, band splitting, and one-way propagation of plasmon waves on a nanoparticle chain
Pike, Nicholas ULiege; Stroud, David

in Journal of Applied Physics (2016), 119

We calculate the dispersion relations of plasmonic waves propagating along a chain of semiconducting or metallic nanoparticles in the presence of both a static magnetic field B and a liquid crystalline ... [more ▼]

We calculate the dispersion relations of plasmonic waves propagating along a chain of semiconducting or metallic nanoparticles in the presence of both a static magnetic field B and a liquid crystalline host. The dispersion relations are obtained using the quasistatic approximation and a dipole-dipole approximation to treat the interaction between surface plasmons on different nanoparticles. For plasmons propagating along a particle chain in a nematic liquid crystalline host with both B and the director parallel to the chain, we find a small, but finite, Faraday rotation angle. For B perpendicular to the chain, but director still parallel to the chain, the field couples the longitudinal and one of the two transverse plasmonic branches. This coupling is shown to split the two branches at the zero field crossing by an amount proportional to |B||B|. In a cholesteric liquid crystal host and an applied magnetic field parallel to the chain, the dispersion relations for left- and right-moving waves are found to be different. For some frequencies, the plasmonic wave propagates only in one of the two directions. [less ▲]

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See detailFardeau des maladies chroniques en Afrique subsaharienne : plaidoyer pour une mise en place des soins palliatifs et d’accompagnement en fin de vie en République démocratique du Congo
Lofandjola Masumbuku, Jacques ULiege

in Ethics, Medicine and Public Health (2017)

Chronic diseases (TM), to date, a burden globally, putting patients in greater need prolonged medical support. CMs are long-term (over 6 months) chronic conditions that evolve and persist over time. They ... [more ▼]

Chronic diseases (TM), to date, a burden globally, putting patients in greater need prolonged medical support. CMs are long-term (over 6 months) chronic conditions that evolve and persist over time. They require care for more than 6 months (cardiovascular, oncological diseases, chronic respiratory diseases, diabetes and HIV / AIDS), are responsible for 63% death. Relatively little reliable information about these diseases is available. Lists containing the major chronic diseases exist but they are scalable and do not always agree [less ▲]

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See detailFare filosofia in Italia nel XXI secolo
Boccaccini, Federico ULiege

in Che fare. Cultura e innovazione (2016)

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See detailLe farfalle di Madrid : L'antimonio, i narratori italiani e la guerra civile spagnola
Curreri, Luciano ULiege

Book published by Bulzoni (2007)

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See detailFarm tourism across Europe
Potocnick, Irma; Schmitz, Serge ULiege

in European Countryside (2013), 5(4), 265-376

Because we acknowledge both the importance of the geographical context on agritourism and the richness of benchmarking, discussions aim to underline and to understand original agritourism practices in ... [more ▼]

Because we acknowledge both the importance of the geographical context on agritourism and the richness of benchmarking, discussions aim to underline and to understand original agritourism practices in relation to their spatial context. According to Sznajder et al. (2009) attention has to be paid to the historical structure of economy, the state of farming, the demographic situation, the accessibility, the social attitudes, the capital resources. Therefore the structure of the farms, the available labour force and buildings, the capital resources as well as the surroundings (including landscape features, natural and cultural heritages) comprise the main characteristics. This special issue aims to explore both the local impacts of agritourism development and the positioning of agritourism on tourist market. [less ▲]

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See detailFarm Tourism across Europe
Potočnik Slavič, Irma; Schmitz, Serge ULiege

in European Countryside (2013), 5(4), 265-274

Based on evidence from nine countries (UK, Belgium, France, Germany, Italy, Poland, Croatia, Slovenia, and Ireland), this special issue analyses the fabrics of farm tourism in Europe. It identifies two ... [more ▼]

Based on evidence from nine countries (UK, Belgium, France, Germany, Italy, Poland, Croatia, Slovenia, and Ireland), this special issue analyses the fabrics of farm tourism in Europe. It identifies two main development trends: on one hand, a small scale and dispersed activities, at the other hand a product in response to tourist market demand. A brief overview of existing farm tourism practices in the European rural areas indicated an interesting interface between the forms and dimension of farm tourism embeddedness in local environment and at the same time, the ways and range of internationalization of farm tourism business. [less ▲]

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See detailFarmer perceptions and pathological constraints in helmeted guinea fowl farming in the Borgou department in North-East Benin
Boko, C. K.; Kpodekon, M. T.; Farougou, S. et al

in African Journal of Agricultural Research (2011), 6

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See detailFarmer's views and values to focus on cattle conservation policies: the case of eight European countries
Gandini, G; Martin-Collado, D; Colinet, Frédéric ULiege et al

in Journal of Animal Breeding & Genetics (2012), 129

Our aim was to identify elements useful in designing policies and programmes for conservation of farm animal genetic resources, taking as case study a group of European local cattle breeds. We first ... [more ▼]

Our aim was to identify elements useful in designing policies and programmes for conservation of farm animal genetic resources, taking as case study a group of European local cattle breeds. We first investigated the implications of differences among countries in the policies and programmes to be developed. Secondly, we analysed key elements common to countries, which may affect local breed viability. We used the herd size trend expected by the farmer in the near future as an indicator of breed viability. Fifteen breeds, for a total of 355 farms, were surveyed. To take into account the multiple factors influencing breeds’ demographic trends, the questionnaire included economical, technical and social aspects. Among the major differences across countries was the perception of the farmer on the value attributed to the local breed by society. Concerning the elements common to countries and their association to breed viability, the greater the collaboration among farmers and the stakeholders’ appreciation as perceived by the farmer, the greater the viability of the farm. An opposite trend was observed for the age of the farmer. Older farmers generally planned to soon cease farming or decrease herd size, whereas young farmers planned to increase the size of their herds. Implications of including these elements in conservation polices are discussed. [less ▲]

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See detailFarmers' Market Access: Investment Timing and Expansion Strategy of an Intermediary Under Uncertainty
Lefevre, Mélanie ULiege

Scientific conference (2012, January)

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See detailFarmers’ Perception and Willingness to Pay for Climate Information in Burkina Faso
Zongo, Bétéo ULiege; Diarra, Abdoulaye; Barbier, Bruno et al

in Journal of Agricultural Science (2016), 8

This study highlights the perception and the option value of climate information in the sahelian and sudano-sahelian agro-climatic zones of Burkina Faso. From the sampled farmers only 21.78% have access ... [more ▼]

This study highlights the perception and the option value of climate information in the sahelian and sudano-sahelian agro-climatic zones of Burkina Faso. From the sampled farmers only 21.78% have access to climate information, while 93% of them need climate information to guide through their decision in planning agricultural activities. Option value shows the interest granted by farmers using climate information. About 64% of the farmers are willing to pay an average of Francs CFA 546.34 to obtain climate information. The willingness to pay is determined by the the farmers’ ability to predict the climate, to use radio as a means of information, farmers’ awareness of previous forecasts and early onset of rainy season. While farmers considered benefits from the use of climate information, it is clear that its contribution to farm income remains a field of research to explore. Thus it is necessary to experiment with individual farms and to evaluate the contribution of climate information to the value added in different crops and farmers’ income. [less ▲]

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See detailFarmers’ practices and acceptability of supplemental irrigation in Burkina Faso
Zongo, Bétéo ULiege; Diarra, Abdoulaye; Barbier, Bruno et al

Conference (2014, June)

Detailed reference viewed: 11 (1 ULiège)