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See detailDynamic Equivalent of a Distribution Grid Hosting Dispersed Photovoltaic Units
Chaspierre, Gilles ULg; Panciatici, Patrick; Van Cutsem, Thierry ULg

in IREP’2017 Symposium: X Bulk Power Systems Dynamics and Control Symposium (in press)

This paper deals with the derivation of a simplified model of a distribution network hosting dispersed photovoltaic units. The model is aimed at short-term dynamic simulations of a transmission grid in ... [more ▼]

This paper deals with the derivation of a simplified model of a distribution network hosting dispersed photovoltaic units. The model is aimed at short-term dynamic simulations of a transmission grid in response to large disturbances. In a first step, a generic dynamic model of a photovoltaic unit is proposed, focusing on its interactions with the grid, in particular the controls triggered by voltage disturbances. The model takes into account various present and near-future grid codes. In a second step, a dynamic equivalent is derived accounting for the distribution network, the dispersed photovoltaic units, as well as static and dynamic (motor) loads. This equivalent is of the “grey-box” type and its parameters are tuned in the least-square sense to match the dynamic response of the original, unreduced system. Simulation results are reported on a detailed 913-bus distribution system subject to faults at transmission level. [less ▲]

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See detailThe European Commission’s geo-blocking proposals and the future of EU e-commerce regulation
Van Cleynenbreugel, Pieter ULg

in Masaryk University Journal of Law and Technology (in press), 11(1),

As part of its Digital Single Market strategy, the European Commission envisages to take action aimed at eradicating the practice of blocking one’s website to persons established or residing in a ... [more ▼]

As part of its Digital Single Market strategy, the European Commission envisages to take action aimed at eradicating the practice of blocking one’s website to persons established or residing in a particular EU Member State. To that extent, a 2015 pro-posal for a regulation on the portability of online streaming services and a 2016 pro-posal for a regulation on geo-blocking outside the audio-visual context have been presented, the scope of which will be analysed in this paper. Although the proposed Regulations would tackle topical problems in EU e commerce and thus offer a necessary step forward in enhancing cross-border trade in the European Union, their envisaged regulatory approach raises important con-cerns from enforcement and rules’ circumvention points of view. Taking stock of those two concerns, the paper will reflect upon ways to mitigate their detrimental effects. Arguing that the geo-blocking proposals already contain the basic tools for such mitigation, the paper advocates the adoption of a more stream-lined EU competition law and e-commerce regulation enforcement strategy, comple-mented by a “technologically more pro-active” EU law interpretation stance to e-commerce at the EU level. [less ▲]

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See detailBurdens of Access: Understanding Customer Barriers and Barrier-Attenuating Practices in Access-Based Services
Hazee, Simon ULg; Delcourt, Cécile ULg; Van Vaerenbergh, Yves

in Journal of Service Research (in press)

Access-based services (ABS), which grant customers limited access to goods without any transfer of ownership, are unique technology-based service innovations requiring the substantial involvement and ... [more ▼]

Access-based services (ABS), which grant customers limited access to goods without any transfer of ownership, are unique technology-based service innovations requiring the substantial involvement and collaboration of customers, without employees’ supervision. Although ABS offer several potential advantages, convincing customers to use them remains challenging. Combining 56 in-depth interviews with supplementary literature, the authors address this challenge by proposing an integrative framework that reflects the (1) barriers that prevent customers from using ABS and (2) practices in which customers engage to attenuate those barriers. The complex, multidimensional barriers relate not only to the service and technology features but also to other customers. Customers can engage in different practices to attenuate perceived barriers and create value, namely, “to distance,” “to manage,” “to elaborate,” “to control,” and “to relate.” Yet they regard these barrier-attenuating practices as necessary sacrifices to use ABS. Complementing suggestions that customers adopt and use ABS to escape the burdens of ownership, the current research reveals that customers actually may confront several “burdens of access.” This research suggests managers who wish to reduce rejection of their innovation could not only overcome customers’ perceived barriers, but also facilitate and reduce the number of practices in which customers engage to attenuate those barriers themselves. [less ▲]

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See detailNine facultative endosymbionts in aphids. A review
Guo, Jianqing ULg; Hatt, Séverin ULg; He, Kanglai et al

in Journal of Asia-Pacific Entomology (in press)

Aphids are frequently engaged in mutualistic associations with endosymbionts. Symbionts are bacterial or fungal microorganisms that can be obligate or facultative to aphids. Research showed facultative ... [more ▼]

Aphids are frequently engaged in mutualistic associations with endosymbionts. Symbionts are bacterial or fungal microorganisms that can be obligate or facultative to aphids. Research showed facultative (or secondary) symbionts have numerous effects on their host aphids such as resistance to heat shock, parasitoids and fungus etc., which may consequently promote a co-evolution between symbionts and hosts. However, this symbiotic relation may be affected by several factors, such as the ability of symbionts to spread from aphids to others within and across populations, and the cost of infections for hosts. Moreover, aphid-symbionts interactions may be affected by aphid living environment such as its host plant, the presence of natural enemies or the temperature. Here we firstly described the functions of nine facultative symbionts (Serratia symbiotica, Hamiltonella defensa, Regiella insecticola, Rickettsia, Rickettsiella, PAXS (pea aphid X-type symbiont), Spiroplasma, Wolbachia and Arsenophonus) studied in aphids one by one, and discussed the associations between these symbionts and aphids, plants and environment. We aim to have a better knowledge of the roles the facultative symbionts play in aphid biology, ecology and evolution, which we believe can provide new inspirations for aphid control. [less ▲]

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See detailDual action of neuro-estrogens in the regulation of male sexual behavior
Cornil, Charlotte ULg; de Bournonville, Catherine

in General and Comparative Endocrinology (in press)

Estrogens derived from brain testosterone aromatization (neuro-estrogens) are critical for the activation of male sexual behavior. Their effects on this behavior are typically associated with long-term ... [more ▼]

Estrogens derived from brain testosterone aromatization (neuro-estrogens) are critical for the activation of male sexual behavior. Their effects on this behavior are typically associated with long-term changes in circulating levels of testosterone and the transcriptional activity of their liganded nuclear receptors. According to this view, neuro-estrogens would prime the neural circuits controlling the long-term expression of behavior, which would then be acutely regulated by neurotransmitter systems conveying information from the social environment. In parallel, neuro-estrogens are also able to produce much faster effects than previously anticipated. Our recent investigations in Japanese quail revealed an interesting dichotomy in the regulation of male sexual behavior by membrane- and nuclear-initiated estrogen signaling providing respectively an acute modulation of sexual motivation and a long-term control of the capacity to display the copulatory sequence. In parallel, a similar dichotomy applies to the regulation of brain aromatase whose expression depends on the transcriptional activity of testosterone metabolites while its enzymatic activity is rapidly regulated in a region- and context-dependent manner. Recent evidences suggest that rapid changes in sexual motivation result from rapid changes in local estrogen production. Together, these data support the idea that the acute regulation of some aspects of male sexual behavior depends not only on classical neurotransmitter systems, but also on rapid and spatially restricted changes in local estrogen availability. The existing literature suggests that this acute regulation by neuro-estrogens of the motivational aspects of behavior could be generalized to other systems such as singing behavior in songbirds. [less ▲]

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See detailHomo sacer, consecratio et destinatio dis
Berthelet, Yann ULg

in Lanfranchi, Thibaud (Ed.) Autour de la notion de sacer (in press)

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See detailTempla de majesté et conception du vote à Rome
Berthelet, Yann ULg

in Virginie Hollard, et al. (Ed.) Le vote en Grèce et à Rome (in press)

Detailed reference viewed: 9 (2 ULg)
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See detailLes élections sacerdotales, sous la République romaine. Un exemple de politisation et de démocratisation ?
Berthelet, Yann ULg

in Hollard, Virginie; Le Digol, Christophe (Eds.) Histoire d'élection(s) (in press)

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See detailLe droit de l’Union européenne face à l’économie collaborative
Van Cleynenbreugel, Pieter ULg

in Revue Trimestrielle de Droit Européen (in press), (3),

La présente contribution a pour objectif de proposer un état de lieux de l’incidence du droit de l’Union européenne sur le développement, la promotion et la règlementation de l’économie collaborative au ... [more ▼]

La présente contribution a pour objectif de proposer un état de lieux de l’incidence du droit de l’Union européenne sur le développement, la promotion et la règlementation de l’économie collaborative au sein du marché intérieur. Pour ce faire, cet article se divise en deux parties. Dans la première partie, le phénomène de l’économie collaborative ainsi que les approches réglementaires envisagées par les institutions de l’Union européenne pour mieux encadrer cette économie seront analysés. Nous soulignerons que l’Union européenne décide pour l’instant de ne pas proposer de nouveaux instruments de réglementation, préférant plutôt interpréter les instruments et dispositions déjà existants du droit de l’Union européenne. S’inscrivant dans cette approche, la deuxième partie de la contribution dressera une cartographie des dispositions pertinentes du droit de l’Union européenne qui gouvernent l’économie collaborative, en proposant des lignes directrices supplémentaires qui devraient permettre d’encore mieux intégrer l’économie collaborative dans le cadre juridique de l’Union européenne. [less ▲]

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See detailFree movement of goods
Van Cleynenbreugel, Pieter ULg; Van den Bogaert, Stefaan

in Ambtenbrink, Fabian; Curtin, Deirdre; De Witte, Bruno (Eds.) et al The Law of the European Union (in press)

This chapter offers a 60 pages overview of the case law on the free movement of goods. It detects the trends underlying the Court's case law and assembles all relevant data on the subject matter.

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See detailVIP: Vortex Image Processing package for high-contrast direct imaging
Gómez González, Carlos ULg; Wertz, Olivier; Absil, Olivier ULg et al

in Astronomical Journal (The) (in press)

We present the Vortex Image Processing (VIP) library, a python package dedicated to astronomical high-contrast imaging. Our package relies on the extensive python stack of scientific libraries and aims to ... [more ▼]

We present the Vortex Image Processing (VIP) library, a python package dedicated to astronomical high-contrast imaging. Our package relies on the extensive python stack of scientific libraries and aims to provide a flexible framework for high-contrast data and image processing. In this paper, we describe the capabilities of VIP related to processing image sequences acquired using the angular di↵erential imaging (ADI) observing technique. VIP implements functionalities for building high-contrast data processing pipelines, encompass- ing pre- and post-processing algorithms, potential sources position and flux estimation, and sensitivity curves generation. Among the reference point-spread function subtraction techniques for ADI post-processing, VIP includes several flavors of principal component analysis (PCA) based algorithms, such as annular PCA and incremental PCA algorithm capable of processing big datacubes (of several gigabytes) on a computer with limited memory. Also, we present a novel ADI algorithm based on non-negative matrix factorization (NMF), which comes from the same family of low-rank matrix approximations as PCA and provides fairly similar results. We showcase the ADI capabilities of the VIP library using a deep sequence on HR8799 taken with the LBTI/LMIRCam and its recently commissioned L-band vortex coronagraph. Using VIP we investigated the presence of additional companions around HR8799 and did not find any significant additional point source beyond the four known planets. VIP is available at http://github.com/vortex-exoplanet/VIP and is accompanied with Jupyter notebook tutorials illustrating the main functionalities of the library. [less ▲]

See detailJavier Cercas, Le mobile
Licata, Nicolas ULg

E-print/Working paper (2018)

Synopsis d'une nouvelle de Javier Cercas intitulée Le mobile (1987), rédigé dans le cadre du dossier "Les lectures pour l'été 2017" de la revue Culture.

Detailed reference viewed: 22 (1 ULg)
See detailLe travailleur du futur et la loi
Kéfer, Fabienne ULg

Conference given outside the academic context (2018)

Le travailleur du futur et la loi A quoi ressemble le travailleur de demain dans un monde où règnent toujours davantage les technologies de l’information ? Cette question est envisagée sous deux angles ... [more ▼]

Le travailleur du futur et la loi A quoi ressemble le travailleur de demain dans un monde où règnent toujours davantage les technologies de l’information ? Cette question est envisagée sous deux angles. Tout d’abord, l’économie numérique a fait naitre de nouvelles formes de production et d’emploi, telles que « l’économie des plateformes » (Uber, Deliveroo, ….). Celle-ci présente divers atouts pour les entreprises et pour les travailleurs, notamment en termes de flexibilité, mais elles est aussi la source de nouvelles formes de travail précaire. Le travailleur de demain est-il un travailleur du numérique sans protection sociale ? Le deuxième angle est celui du travailleur hyperconnecté. Faut-il envisager de créer un droit à la déconnexion ? [less ▲]

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See detailPSI inv. 925v. HOMÈRE, Iliade, XVII 522-525
Marganne, Marie-Hélène ULg

in Bastianini, Guido; Minutoli, Diletta (Eds.) Raccolta di papiri inediti in onore di Gabriella Messeri (2018)

Edition of the PSI inv. 925

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See detailA Quinean-Inspired Interpretation of Meinong's Theory of Objects
Zincq, Aurélien ULg

in Dewalque, Arnaud; Raspa, Venanzio (Eds.) Psychological Themes in the School of Meinong (2018)

Detailed reference viewed: 23 (1 ULg)
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See detailThe roles of competition law in digital single market regulation: lessons (not) to learn from other regulated industries?
Van Cleynenbreugel, Pieter ULg

in Rusu, Catalin; Veenbrink, Marc; Looijestein-Clearie, Anne (Eds.) Digital markets in the European Union (2018)

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See detailIndependent conditional clauses with argumentative function in Dutch
D’Hertefelt, Sarah; Van linden, An ULg

in Text & Talk (2018)

This study offers an analysis of independent conditional clauses (ICCs) that are used with argumentative functions in spoken Dutch. ICCs are used as arguments when they serve to motivate the speaker’s ... [more ▼]

This study offers an analysis of independent conditional clauses (ICCs) that are used with argumentative functions in spoken Dutch. ICCs are used as arguments when they serve to motivate the speaker’s implied standpoint regarding a preceding propositional content, termed the trigger. Two basic types of argumentative ICCs can be distinguished, which are termed ‘direct’ and ‘indirect’ arguments. Direct arguments express a contextually given premise on the basis of which a conclusion about the speaker’s standpoint regarding a preceding trigger can be drawn. Indirect arguments, by contrast, express a condition that – if it had held – would have warranted the conclusion, but its counterfactual interpretation resulting from hypothetical backshift signals that the speaker knows that this condition is not fulfilled, and hence that the implied standpoint regarding a trigger is not valid either. We argue that direct and indirect ICCs instantiate independent instances of epistemic non-predictive conditionals and hypothetical predictive conditionals (Dancygier 1993, 1998) respectively, and that they set up propositional-logic arguments of different classic forms, i.e. the modus ponendo ponens form (direct ICCs) and the denying the antecedent form (indirect ICCs). However, they do not explicitly express the conclusion of the argument, as they lack a main clause, but leave it to be inferred by the addressee. [less ▲]