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See detailFrench Texts in Medieval Cambridge
Morato, Nicola ULg

E-print/Working paper (2014)

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See detailHubble Space Telescope Near-IR Transmission Spectroscopy of the Super-Earth HD 97658b
Knutson, Heather A.; Dragomir, Diana; Kreidberg, Laura et al

E-print/Working paper (2014)

Recent results from the Kepler mission indicate that super-Earths (planets with masses between 1-10 times that of the Earth) are the most common kind of planet around nearby Sun-like stars. These planets ... [more ▼]

Recent results from the Kepler mission indicate that super-Earths (planets with masses between 1-10 times that of the Earth) are the most common kind of planet around nearby Sun-like stars. These planets have no direct solar system analogue, and are currently one of the least well-understood classes of extrasolar planets. Many super-Earths have average densities that are consistent with a broad range of bulk compositions, including both water-dominated worlds and rocky planets covered by a thick hydrogen and helium atmosphere. Measurements of the transmission spectra of these planets offer the opportunity to resolve this degeneracy by directly constraining the scale heights and corresponding mean molecular weights of their atmospheres. We present Hubble Space Telescope near-infrared spectroscopy of two transits of the newly discovered transiting super-Earth HD 97658b. We use the Wide Field Camera 3's scanning mode to measure the wavelength-dependent transit depth in thirty individual bandpasses. Our averaged differential transmission spectrum has a median 1 sigma uncertainty of 19 ppm in individual bins, making this the most precise observation of an exoplanetary transmission spectrum obtained with WFC3 to date. Our data are inconsistent with a cloud-free solar metallicity atmosphere at the 17 sigma level. They are a good match for flat models corresponding to either a metal-rich atmosphere or a solar metallicity atmosphere with a cloud or haze layer located at pressures of a mbar or higher. [less ▲]

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See detailWASP-20b and WASP-28b: a hot Saturn and a hot Jupiter in near-aligned orbits around solar-type stars
Anderson, D. R.; Collier Cameron, A.; Hellier, C. et al

E-print/Working paper (2014)

We report the discovery of the planets WASP-20b and WASP-28b along with measurements of their sky-projected orbital obliquities. WASP-20b is an inflated, Saturn-mass planet (0.31 $M_{\rm Jup}$; 1.46 $R ... [more ▼]

We report the discovery of the planets WASP-20b and WASP-28b along with measurements of their sky-projected orbital obliquities. WASP-20b is an inflated, Saturn-mass planet (0.31 $M_{\rm Jup}$; 1.46 $R_{\rm Jup}$) in a 4.9-day, near-aligned ($\lambda = 8.1 \pm 3.6^\circ$) orbit around CD-24 102 ($V$=10.7; F9). WASP-28b is an inflated, Jupiter-mass planet (0.91 $M_{\rm Jup}$; 1.21 $R_{\rm Jup}$) in a 3.4-day, near-aligned ($\lambda = 8 \pm 18^\circ$) orbit around a $V$=12, F8 star. As intermediate-mass planets in short orbits around aged, cool stars ($7^{+2}_{-1}$ Gyr for WASP-20 and $5^{+3}_{-2}$ Gyr for WASP-28; both with $T_{\rm eff}$ < 6250 K), their orbital alignment is consistent with the hypothesis that close-in giant planets are scattered into eccentric orbits with random alignments, which are then circularised and aligned with their stars' spins via tidal dissipation. [less ▲]

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See detailEn el laboratorio de la ciencia ficción hispánica: una entrevista
Ceballos Viro, Alvaro ULg

E-print/Working paper (2014)

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See detailZola in Sciascia. Una nota su Candido
Curreri, Luciano ULg

E-print/Working paper (2014)

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See detailVon Themara nach Belgrad und zurück: Burkhard Spinnens Roman "Nevena"
Dupont, Bruno ULg

E-print/Working paper (2014)

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See detailCerebral functional connectivity periodically (de)synchronizes with anatomical constraints
Liegeois, Raphaël ULg; Sepulchre, Rodolphe ULg; LAUREYS, Steven ULg

E-print/Working paper (2014)

This paper studies the link between resting-state functional connectivity (FC), measured by the correlations of the fMRI BOLD time courses, and structural connectivity (SC), estimated through fiber ... [more ▼]

This paper studies the link between resting-state functional connectivity (FC), measured by the correlations of the fMRI BOLD time courses, and structural connectivity (SC), estimated through fiber tractography. Instead of a static analysis based on the correlation between SC and the FC averaged over the entire fMRI time series, we propose a dynamic analysis, based on the time evolution of the correlation between SC and a suitably windowed FC. Assessing the statistical significance of the time series against random phase permutations, our data show a pronounced peak of significance for time window widths around 20-30 TR (40-60 sec). Using the appropriate window width, we show that FC patterns oscillate between phases of high modularity, primarily shaped by anatomy, and phases of low modularity, primarily shaped by inter-network connectivity. Building upon recent results in dynamic FC, this emphasizes the potential role of SC as a transitory architecture between different highly connected resting state FC patterns. Finally, we show that networks implied in consciousness-related processes, such as the default mode network (DMN), contribute more to these brain-level fluctuations compared to other networks, such as the motor or somatosensory networks. This suggests that the fluctuations between FC and SC are capturing mind-wandering effects. [less ▲]

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See detailInflated discrete Beta regression models for Likert and discrete rating scale outcomes
Taverne, Cédric; Lambert, Philippe ULg

E-print/Working paper (2014)

Discrete ordinal responses such as Likert scales are regularly proposed in questionnaires and used as dependent variable in modeling. The response distribution for such scales is always discrete, with ... [more ▼]

Discrete ordinal responses such as Likert scales are regularly proposed in questionnaires and used as dependent variable in modeling. The response distribution for such scales is always discrete, with bounded support and often skewed. In addition, one particular level of the scale is frequently inflated as it cumulates respondents who invari- ably choose that particular level (typically the middle or one extreme of the scale) without hesitation with those who chose that alternative but might have selected a neighboring one. The inflated discrete beta regression (IDBR) model addresses those four critical characteristics that have never been taken into account simultaneously by existing models. The mean and the dispersion of rates are jointly regressed on covariates using an underlying beta distribution. The probability that choosers of the inflated level invariably make that choice is also regressed on covariates. Simulation studies used to evaluate the statistical properties of the IDBR model suggest that it produces more precise predictions than competing models. The ability to jointly model the location and dispersion of (the distribution of) an ordinal response, as well as to characterize the profile of subject selecting an ”inflated” alternative are the most relevant features of the IDBR model. It is illustrated with the analysis of the political positioning on a ”left-right” scale of the Belgian respondents in the 2012 European Social Survey. [less ▲]

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See detailLouis-Blanche Pérrucard de Ballon
Henneau, Marie-Elisabeth ULg

E-print/Working paper (2014)

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See detailWhat roles for energy cooperatives in the diffusion of distributed generation technologies?
Bauwens, Thomas ULg

E-print/Working paper (2014)

Whereas a centralized model of electricity infrastructure is still dominant today, many scholars advocate the diffusion of distributed generation technologies, implying geographically dispersed and small ... [more ▼]

Whereas a centralized model of electricity infrastructure is still dominant today, many scholars advocate the diffusion of distributed generation technologies, implying geographically dispersed and small-scale generation units located close to consumers. However, there exist various barriers of different natures to a large-scale penetration of these technologies. In this article, we focus on the behavioral and psychological ones, emphasizing the roles that citizens have to play in this issue. More specifically, we explore a specific way of involving citizens in such diffusion, namely energy cooperatives. After presenting the driving forces of the emergence of cooperative firms in the energy sector, we examine the assets of the cooperative ownership structure from the perspectives of behavioral economics and social psychology. Our analysis enables us to build a model of how cooperatives may enhance consumer engagement in the diffusion of distributed generation technologies. This provides a basic theoretical framework for future empirical research. [less ▲]

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See detailIntegrating the weight of history into the alignment framework: the case of distributed generation technologies
Bauwens, Thomas ULg

E-print/Working paper (2014)

Whereas a centralized energy supply system is still dominant today, the energy sector is currently witnessing the development of small-scale and more geographically dispersed generation units, so-called ... [more ▼]

Whereas a centralized energy supply system is still dominant today, the energy sector is currently witnessing the development of small-scale and more geographically dispersed generation units, so-called distributed generation technologies. So-called "alignment framework" proposes a very useful approach to look at this evolution. Yet, we argue in this paper that this framework does not fully take into account the inertia associated with past technological and institutional choices that may hinder future changes. Relying on the concept of socio-technical lock-in, we illustrate this point with the case of the diffusion of distributed generation technologies. Based on this analysis, we propose an adaptation of the alignment framework to integrate these elements. [less ▲]

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See detailHedwig Margrethe Elisabeth von Ranzau
Henneau, Marie-Elisabeth ULg

E-print/Working paper (2014)

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See detailPhysician induced demand for C-sections: does the convenience incentive matter?
Lefevre, Mélanie ULg

E-print/Working paper (2014)

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of primary cesareans to ... [more ▼]

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of primary cesareans to accommodate their own preferences for control of deliveries around holiday Mondays. Using a sample of more than 1,300,000 deliveries, I can estimate that the induced demand due to convenience is close to zero. A small signi cant e ect is found for women having had a previous C-section. While I replicate previous results of lower C-section rates on leisure periods, I show that they are due to the way doctors schedule planned cesareans rather than to an induced demand for reason of physicians' convenience. If induced demand occurs, the decision takes place in the labor room and is not planned in advance. [less ▲]

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See detailDes royaumes aux nations ? L’Europe barbare aux Ve-VIe siècles
Fialon, Sabine ULg

E-print/Working paper (2014)

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Peer Reviewed
See detailLes fondations en Belgique
Mernier, Amélie ULg; Xhauflair, Virginie ULg

E-print/Working paper (2014)

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See detailDe stichtingen in Belgie
Mernier, Amélie ULg; Xhauflair, Virginie ULg

E-print/Working paper (2014)

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See detailSix newly-discovered hot Jupiters transiting F/G stars: WASP-87b, WASP-108b, WASP-109b, WASP-110b, WASP-111b \amp WASP-112b
Anderson, D. R.; Brown, D. J. A.; Collier Cameron, A. et al

E-print/Working paper (2014)

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See detailIda de Gorsleeuw
Henneau, Marie-Elisabeth ULg

E-print/Working paper (2014)

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See detailActive network management for electrical distribution systems: problem formulation, benchmark, and approximate solution
Gemine, Quentin ULg; Ernst, Damien ULg; Cornélusse, Bertrand ULg

E-print/Working paper (2014)

With the increasing share of renewable and distributed generation in electrical distribution systems, Active Network Management (ANM) becomes a valuable option for a distribution system operator to ... [more ▼]

With the increasing share of renewable and distributed generation in electrical distribution systems, Active Network Management (ANM) becomes a valuable option for a distribution system operator to operate his system in a secure and cost-effective way without relying solely on network reinforcement. ANM strategies are short-term policies that control the power injected by generators and/or taken off by loads in order to avoid congestion or voltage issues. While simple ANM strategies consist in curtailing temporary excess generation, more advanced strategies rather attempt to move the consumption of loads to anticipated periods of high renewable generation. However, such advanced strategies imply that the system operator has to solve large-scale optimal sequential decision-making problems under uncertainty. The problems are sequential for several reasons. For example, decisions taken at a given moment constrain the future decisions that can be taken, and decisions should be communicated to the actors of the system sufficiently in advance to grant them enough time for implementation. Uncertainty must be explicitly accounted for because neither demand nor generation can be accurately forecasted. We first formalize the ANM problem, which in addition to be sequential and uncertain, has a non-linear nature stemming from the power flow equations and a discrete nature arising from the activation of power modulation signals. This ANM problem is then cast as a stochastic mixed integer non-linear program, for which we provide quantitative results using state of the art open source solvers and perform a sensitivity analysis over the amount of flexibility available in the system and the number of scenarios considered in the deterministic equivalent of the stochastic program. To foster further research on this problem, we make available a test bed based on a 75-bus distribution network at http://www.montefiore.ulg.ac.be/~anm/ . This test bed contains a simulator of the distribution system, with stochastic models for the generation and consumption devices, and callbacks to implement and test various ANM strategies [less ▲]

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See detailAn economic appraisal of MOOC platforms: business models and impacts on higher education
belleflamme, paul; Jacqmin, Julien ULg

E-print/Working paper (2014)

We start by using various economic and pedagogical concepts to understand the specificities of MOOC (Massive Online Open Courses) platforms. We then discuss how the private provision of MOOCs, seen as ... [more ▼]

We start by using various economic and pedagogical concepts to understand the specificities of MOOC (Massive Online Open Courses) platforms. We then discuss how the private provision of MOOCs, seen as pure public goods, can be sustained. Based on the theory of multisided platforms, we analyse five ways to monetize the MOOC business. Our conclusion is that the most sustainable approach is what we call the ‘subcontractor model’, flavored by touches of the other four models. We then claim that MOOC platforms can play a key transformative role in the higher education sector by making teaching practices evolve, rather than by replacing incumbent institutions. Finally, we derive a number of directions for public policy: governments should act to foster the cooperation between MOOC platforms and other higher education institutions, so as to improve the benefits that can arise from these technological innovations; a particular focus should also be given to professors in order to encourage them to innovate in their teaching practices [less ▲]

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See detailQue pouvons-nous attendre du sommet européen de décembre 2013 ?
Dumoulin, André ULg

E-print/Working paper (2013)

Hypothèses autour des décisions attendues du sommet UE spécial défense prévu en décembre 2013 avec les différentes écoles de pensée

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See detailWat kunnen wij verwachten van de Europese top van december 2013 ?
Dumoulin, André ULg

E-print/Working paper (2013)

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See detailWhat can we expect from the December 2013 European Summit ?
Dumoulin, André ULg

E-print/Working paper (2013)

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See detailSpline approximation to conditional Archimedean copula
Lambert, Philippe ULg

E-print/Working paper (2013)

We propose a flexible copula model to describe changes with a covari- ate in the dependence structure of (conditionally exchangeable) random variables. The starting point is a spline approximation to the ... [more ▼]

We propose a flexible copula model to describe changes with a covari- ate in the dependence structure of (conditionally exchangeable) random variables. The starting point is a spline approximation to the generator of an Archimedean copula. Changes in the dependence structure with a covariate x are modelled by flexible regression of the spline coefficients on x. The performances and properties of the spline estimate of the reference generator and the abilities of these conditional models to approximate conditional copulas are studied through simulations. Inference is made using Bayesian arguments with posterior distributions explored using im- portance sampling or adaptive MCMC algorithms. The modelling strategy is illustrated with two examples. [less ▲]

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See detailAccord Canada-UE: la nouvelle approche d'exemption culturelle et ses implications
Vlassis, Antonios ULg

E-print/Working paper (2013)

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See detailAccord Canada-UE: l'exemption culturelle specifique et ses implications
Vlassis, Antonios ULg; Gagné, Gilbert

E-print/Working paper (2013)

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See detailUne épaule sur laquelle s'appuyer
Forthomme, Bénédicte ULg

E-print/Working paper (2013)

Detailed reference viewed: 75 (6 ULg)
See detailCos: A Typical Example of Hellenistic Religion?
Paul, Stéphanie ULg

E-print/Working paper (2013)

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See detailLe samedi 15 août 778
Rolland, Jean-Noël ULg

E-print/Working paper (2013)

Battle of Roncevaux Pass and his historical context. Roncesvalles is famous in History and legend for the defeat of Charlemagne and the death of Roland in 778, during the battle of Roncevaux Pass, when ... [more ▼]

Battle of Roncevaux Pass and his historical context. Roncesvalles is famous in History and legend for the defeat of Charlemagne and the death of Roland in 778, during the battle of Roncevaux Pass, when Charlemagne's rear guard was destroyed by Basque tribes. [less ▲]

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See detailDaniel Kehlmann: Ich und Kaminski
Hackbarth, Sabine ULg; Dupont, Bruno ULg

E-print/Working paper (2013)

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See detailThree irradiated and bloated hot Jupiters: WASP-76b, WASP-82b & WASP-90b
West, R. G.; Almenara, J.-M.; Anderson, D. R. et al

E-print/Working paper (2013)

We report three new transiting hot-Jupiter planets discovered from the WASP surveys combined with radial velocities from OHP/SOPHIE and Euler/CORALIE and photometry from Euler and TRAPPIST. All three ... [more ▼]

We report three new transiting hot-Jupiter planets discovered from the WASP surveys combined with radial velocities from OHP/SOPHIE and Euler/CORALIE and photometry from Euler and TRAPPIST. All three planets are inflated, with radii 1.7-1.8 Rjup. All orbit hot stars, F5-F7, and all three stars have evolved, post-MS radii (1.7-2.2 Rsun). Thus the three planets, with orbits of 1.8-3.9 d, are among the most irradiated planets known. This reinforces the correlation between inflated planets and stellar irradiation. [less ▲]

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See detailSearching for Terrestrial Planets Orbiting in the Habitable Zone of Ultra-Cool Stars and Brown Dwarfs
Demory, Brice-Olivier; Seager, Sara; Lissauer, Jack et al

E-print/Working paper (2013)

We propose to use Kepler in 2-wheel mode to conduct a detailed search for Earth-sized planets orbiting ultra-cool stars and brown dwarfs (spectral types from M7 to L3). This population of objects presents ... [more ▼]

We propose to use Kepler in 2-wheel mode to conduct a detailed search for Earth-sized planets orbiting ultra-cool stars and brown dwarfs (spectral types from M7 to L3). This population of objects presents several advantages for exoplanet surveys. First, ultra-cool stars and brown dwarfs are small and thus result in favorable planet-to-star area ratios. Second, because of their low effective temperature, the inner edge of their habitable zone is extremely close (2 to 3 days only). Third, our targets are bright at infrared wavelengths, which will enable detailed follow-up studies. Our program therefore represents a unique opportunity to find a transiting Earth-size exoplanet for which atmospheric features (including biosignatures) could be detected with near-to-come facilities such as JWST. Such exoplanet has not been discovered yet. Kepler in 2-wheel mode provides the required stability and photometric precision to make this survey successful. Our initial target sample includes 60 ultra-cool stars and brown dwarfs from which we expect to detect at least one transiting planet. We propose to monitor each source for 4 days, resulting in a total program duration of ~240 days. [less ▲]

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See detailPhysician Induced Demand for C-Sections: Does the Convenience Incentive Matter?
Lefevre, Mélanie ULg

E-print/Working paper (2013)

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of cesareans to accommodate ... [more ▼]

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of cesareans to accommodate their own preferences for control of deliveries around holiday Mondays. Using a sample of more than 1,300,000 deliveries, I can precisely estimate that the induced demand due to convenience is close to zero. While I replicate previous results of lower C-section rates on leisure periods, I show that they are due to the way doctors schedule planned cesareans rather than to an induced demand for reason of physicians' convenience. [less ▲]

Detailed reference viewed: 19 (6 ULg)
See detailLes Draps de lit
Demoulin, Laurent ULg

E-print/Working paper (2013)

Les Draps de lit est une pièce de théâtre inédite de Jean-Philippe Toussaint, antérieure à La Salle de bain. Elle est ici éditée avec un apparat critique: variantes et notes critiques.

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See detailChicago Gospel Festival June 2013
Sacré, Robert ULg

E-print/Working paper (2013)

Compte-rendu avec photos

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See detailLa gouvernance des coopératives en situation de conflit et de post-conflit
Niyungeko, Thadée ULg; Huybrechts, Benjamin ULg

E-print/Working paper (2013)

If governance has become, for many years, as a matter of paramount importance in traditional companies (Berle & Means, 1932), microfinance institutions have also not escaped this need (Rock et al. 1998 ... [more ▼]

If governance has become, for many years, as a matter of paramount importance in traditional companies (Berle & Means, 1932), microfinance institutions have also not escaped this need (Rock et al. 1998), there are about thirty years. Considered essential to address issues related to economic and social development (Wélé, 2009), governance is also emerging as an undeniable factor for to strengthen the financial performance and to increase awareness in microfinance institutions (Rock et al., 1998; Labie, 2001 Helms, 2006). Several authors have contributed to the understanding of corporate governance by using a variety of theoretical approaches (Jensen & Meckling (1976), Fama and Jensen (1983a) for Shareholders approach, Freeman (1984), Donaldson & Preston (1995) Hung (1998) for the stakeholder approach, Meyer and Rowan (1977), Mertens (2010), Muth & Donaldson (1998), Berle & Means (1932); Labie (2005a) for alternative approaches). Applied individually in cooperatives and organizations, these approaches have proved rather one-dimensional and illuminate one aspect of the Boards of Directors (Cornforth, 2004). Hence the need for an approach that integrates the insights of these perspectives has been felt. Thus, a perspective in terms of paradox (Cornforth, 2004) helped to highlight the dilemmas, paradoxes and tensions that boards of directors are facing. Several researchers have used this paradox perspective in different organizations (Demb & Neubauer, 1992 Wood, 1996; Sundaramurthy & Lewis, 2003), but it also did not take long. Criticized for focusing only on the board, this perspective paradox is also alleged to ignore the role of contextual factors. However, as argued by DiMaggio & Powell (1983), Meyer and Rowan (1977), environmental factors play an undeniable role in the way organizations make isomorphic. Rijpens & Adam (2011) also point out that the internal and external factors to the organization involved in the debate on the governance model adopted. Hudon and Seibel (2007) argue that conflicts and disasters seriously affect the socio-economic institutions, public governance, networks and social relations of citizens, including those related to the exchange or transfer of financial resources. This article examines the influence of armed conflict on the cooperatives’ governance. It is built around three fundamental questions. (1) What overlay the systems of cooperatives governance? (2) What is the theoretical model of governance adapted to cooperatives working in conflict situations? (3) How an armed conflict does it influence the cooperatives governance? To answer these questions, this article assumes, first, the confrontation of existing theoretical approaches in the literature on corporate governance in general and cooperatives in particular. It then develops a model of governance adapted to the conflict. Finally, that model will be tested after data collect from a qualitative field study based on the triangulation of information resources and interviews with key players in organizations under study in a country where microfinance institutions have evolved conflict situations. The results will be presented in another article. [less ▲]

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See detailDo consumers pay more for what they value more? The case of local milk-based dairy products in Senegal
Lefevre, Mélanie ULg

E-print/Working paper (2013)

Senegalese consumers seem to prefer local fresh milk-based dairy products rather than the ones produced with imported powder. However, market prices of both products do not appear to be different. This ... [more ▼]

Senegalese consumers seem to prefer local fresh milk-based dairy products rather than the ones produced with imported powder. However, market prices of both products do not appear to be different. This paper addresses this puzzle. First, I confirm the preference for local products. Using choice-based-conjoint data, I evaluate that Senegalese consumers are willing to pay a positive and significant premium for these products. Then, I identify the determinants of prices, based on a unique dataset of milk products characteristics. Evidence suggests that consumers' misinformation regarding the product composition prevents them from allocating a higher price to local milk-based products. [less ▲]

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See detailBlues on The Fox , Blues Festival Aurora June 2013
Sacré, Robert ULg

E-print/Working paper (2013)

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Peer Reviewed
See detailInnovations in IT Organization Design: Is the Public Sector Really a Special Case?
Markus, M. Lynne; Jacobson, Dax D.; Lisein, Olivier ULg et al

E-print/Working paper (2013)

IT organization design, consisting of IT governance (decision rights) and IT organization structure, is believed to affect organizational performance. This paper describes the IT organization design ... [more ▼]

IT organization design, consisting of IT governance (decision rights) and IT organization structure, is believed to affect organizational performance. This paper describes the IT organization design choices of the 50 U.S. state governments. Significant movement toward greater centralization was observed (particularly for IT services). States appeared to have adopted IT organization design innovations previously pioneered in the private sector, contrary to conventional wisdom founded on well-documented differences between the two sectors. Two commonly used explanations of IT organization design choices were examined for their ability to account for the unexpected findings — contingency and institutional theories. Both explanations were partially successful in explaining the results, but further theoretical development is needed to integrate those theories and more empirical research is needed to advance the field’s knowledge of IT organization design. [less ▲]

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See detailThe HARPS search for southern extra-solar planets. XXXIV. A planetary system around the nearby M dwarf GJ163, with a super-Earth possibly in the habitable zone
Bonfils, X.; Lo Curto, G.; Correia, A. C. M. et al

E-print/Working paper (2013)

The meter-per-second precision achieved by today velocimeters enables the search for 1-10 M_Earth planets in the habitable zone of cool stars. This paper reports on the detection of 3 planets orbiting ... [more ▼]

The meter-per-second precision achieved by today velocimeters enables the search for 1-10 M_Earth planets in the habitable zone of cool stars. This paper reports on the detection of 3 planets orbiting GJ163 (HIP19394), a M3 dwarf monitored by our ESO/HARPS search for planets. We made use of the HARPS spectrograph to collect 150 radial velocities of GJ163 over a period of 8 years. We searched the RV time series for coherent signals and found 5 distinct periodic variabilities. We investigated the stellar activity and casted doubts on the planetary interpretation for 2 signals. Before more data can be acquired we concluded that at least 3 planets are orbiting GJ163. They have orbital periods of P_b=8.632+-0.002, P_c=25.63+-0.03 and P_d=604+-8 days and minimum masses msini = 10.6+-0.6, 6.8+-0.9, and 29+-3 M_Earth, respectively. We hold our interpretations for the 2 additional signals with periods P_(e)=19.4 and P_(f)=108 days. The inner pair presents an orbital period ratio of 2.97, but a dynamical analysis of the system shows that it lays outside the 3:1 mean motion resonance. GJ163c, in particular, is a super-Earth with an equilibrium temperature of T_eq = (302+-10) (1-A)^(1/4) K and may lie in the so called habitable zone for albedo values (A=0.34-0.89) moderately higher than that of Earth (A_Earth=0.2-0.3). [less ▲]

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See detailGabriel package: software for education and research
Olive, Gilles ULg

E-print/Working paper (2013)

Today, personal computers are part of our life either at home, at work or at school. Even if the computer power increases, the software are more and more complicated, asking more and more time for ... [more ▼]

Today, personal computers are part of our life either at home, at work or at school. Even if the computer power increases, the software are more and more complicated, asking more and more time for learning it or for obtaining a result. It becomes important to have in labs as well as at school small fast software using empirical equations. We report here about the use but more particularly the algorithms, the equations and the data sets of three software belonging to the Gabriel package. The first one, Gabriel Nathalie II, is a calculator with many functionality's. It is possible to calculate the pKa or to simulate the chemical shift in 31P NMR of amino-phosphonate. Moreover it is also able to dertimine the thermodynamics data of bisphosphonate binding to human bones. The second one, Gabriel Calculatrice Savon, is used to calculate the amount of alkali needed for making a soap according to the amount and the nature of fat but also the viscosity of some oils at a desired temperature. And at least Gabriel Data Analysis is a software devoted to data analysis. Today, software for research can be used for educational and educational software can be useful for research. [less ▲]

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See detailNegociations commerciales : le retour permanent de l’exception culturelle
Vlassis, Antonios ULg

E-print/Working paper (2013)

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See detailAlexander Kluge et Heiner Müller, ou quand l'interview devient un art
Dupont, Bruno ULg

E-print/Working paper (2013)

Les interviews entre Alexander Kluge et Heiner Müller dans les années nonante sont devenues légendaires, à tel point qu'on les considère comme une partie de l'œuvre du dramaturge de la RDA. Elles sont le ... [more ▼]

Les interviews entre Alexander Kluge et Heiner Müller dans les années nonante sont devenues légendaires, à tel point qu'on les considère comme une partie de l'œuvre du dramaturge de la RDA. Elles sont le témoin de l'irruption de Kluge dans l'audiovisuel allemand, ainsi que de la pensée et la parole de Müller. La publication de leur recueil en français permet de revivre ces dialogues, fruit de la rencontre de deux artistes hors-normes. Diffusés il y a vingt ans, ces échanges sont toujours actuels. Cet article explique pourquoi. [less ▲]

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See detailSOUTHERN BLUES NIGHT , Heerlen (NL) 17e ed. , 15 mars 2013
Sacré, Robert ULg

E-print/Working paper (2013)

C.R. de la 17e Southern Blues Night , le 15 mars 2013 à Heerlen ( Nl) + photos ; Khalif Wailin' Walter , Mud Morganfield, Heritage Blues Orchestra, James Harman, Enrico Crivellaro, Gene Taylor, ....

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See detailNegociations commerciales: entre nouvelles approches et voies strategiques déjà experimentées
Vlassis, Antonios ULg; Gagné, Gilbert

E-print/Working paper (2013)

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See detailPage de Beckett et Beckett de Page
Demoulin, Laurent ULg

E-print/Working paper (2013)

Compte rendu du livre de Martin Page L'Apiculture selon Samuel Beckett.

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See detailCompte rendu de Claude Simon: Situations
Demoulin, Laurent ULg

E-print/Working paper (2013)

Compte rendu du passionnant ouvrage dirigé par Paul Dirkx et Pascal Mougin au sujet de Claude Simon. Esquisse de réflexion sur la clôture du texte.

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See detailGravitationall lensing evidence against extended dark matter halos
Magain, Pierre ULg; Chantry, Virginie ULg

E-print/Working paper (2013)

It is generally thought that galaxies are embedded in dark matter halos extending well beyond their luminous matter. The existence of these galactic halos is mainly derived from the larger than expected ... [more ▼]

It is generally thought that galaxies are embedded in dark matter halos extending well beyond their luminous matter. The existence of these galactic halos is mainly derived from the larger than expected velocities of stars and gas in the outskirts of spiral galaxies. Much less is known about dark matter around early-type (elliptical or lenticular) galaxies. We use gravitational lensing to derive the masses of early-type galaxies deflecting light of background quasars. This provides a robust measurement of the total mass within the Einstein ring, a circle whose diameter is comparable to the separation of the different quasar images. We find that the mass-to-light ratio of the lensing galaxies does not depend on radius, from inner galactic regions out to several half-light radii. Moreover, its value does not exceed the value predicted by stellar population models by more than a factor two, which may be explained by baryonic dark matter alone, without any need for exotic matter. Our results thus suggest that, if dark matter is present in early-type galaxies, its amount does not exceed the amount of luminous matter and its density follows that of luminous matter, in sharp contrast to what is found from rotation curves of spiral galaxies. [less ▲]

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See detailFAO Training in Crop Yield Forecasting. Crop Yield Forecasting Methodology Enhancement – Remote sensing. Erevan 21 - 25 January 2013.
Denis, Antoine ULg

E-print/Working paper (2013)

Power point presentation of the FAO training "Crop Yield Forecasting Methodology Enhancement – Remote sensing", held in Erevan, Armenia, 21 - 25 January 2013 at ARMSTATEHYDROMET. The main objective of ... [more ▼]

Power point presentation of the FAO training "Crop Yield Forecasting Methodology Enhancement – Remote sensing", held in Erevan, Armenia, 21 - 25 January 2013 at ARMSTATEHYDROMET. The main objective of this training was the improvement of the Crop Yield Forecasting System (CYFS) in Armenia by introducing a new approach for satellite data integration (use of TIMESAT software and METOP AVHRR NDVI images). This training was held in the framework of the "EC/FAO Programme on Information Systems to Improve Food Security Decision-Making in the European Neighbourhood Policy (ENP) East Area GCP/GLO/275/EC". [less ▲]

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See detailSome misunderstood or unknown tricks (VII) (LaTeX)
Merciadri, Luca ULg

E-print/Working paper (2013)

This time, as habitually, we shall see some tricks: 2. Putting two itemizations on the same line, 3. Using footnotes in boxes, 4. Dealing with PDF cut-and-past and search functionalities, even when you ... [more ▼]

This time, as habitually, we shall see some tricks: 2. Putting two itemizations on the same line, 3. Using footnotes in boxes, 4. Dealing with PDF cut-and-past and search functionalities, even when you are using accented characters, 5. Making a distinction with \overline for propositional logic formulae, 6. Referring to \labels by long names. We will then discuss some problems people often face when dealing with many figures, and, more generally, floats, in reports. Finally, we will deal with a Beamer scheme which aims at using a single file for both a presentation, and the related report. [less ▲]

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See detailLa réforme du Conseil d’Etat semble désormais sur les rails
Donnay, Luc ULg

E-print/Working paper (2013)

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See detailL’écriture au présent de Thierry Horguelin
Demoulin, Laurent ULg

E-print/Working paper (2013)

Les notations prises sur le vif par Thierry Horguelin portent un regard singulier sur notre quotidien.

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See detail« Pourquoi une nouvelle traduction du Hobbit ? »
Dor, Juliette ULg

E-print/Working paper (2013)

Après la traduction française de Francis Ledoux, qui datait de 1969, les éditions Bourgois viennent de publier une nouvelle traduction du Hobbit, par Daniel Lauzon, plus proche de l'œuvre de Tolkien, plus ... [more ▼]

Après la traduction française de Francis Ledoux, qui datait de 1969, les éditions Bourgois viennent de publier une nouvelle traduction du Hobbit, par Daniel Lauzon, plus proche de l'œuvre de Tolkien, plus contemporaine aussi. [less ▲]

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See detailConnecting IT Governance with Sourcing Theory: IT Centralization, Consolidation, and Outsourcing in US State Governments
Markus, M. Lynne; Jacobson, Dax D.; Bui, Quang Neo et al

E-print/Working paper (2013)

This paper focuses on an apparent disconnect between the literatures on 1) the governance of IT decisions and the organization of IT activities inside organizations and 2) IT outsourcing decisions and IT ... [more ▼]

This paper focuses on an apparent disconnect between the literatures on 1) the governance of IT decisions and the organization of IT activities inside organizations and 2) IT outsourcing decisions and IT outsourcing governance arrangements between client organizations and IT service providers. We hypothesize that centralization of IT activities within organizations is a necessary precondition for outcomes such as IT consolidation (leading to large cost efficiencies) and outsourcing deals and possibly also for successful consolidation and outsourcing. We investigate this hypothesis through an exploratory, mixed-method investigation of changes in IT governance arrangements and outcomes in a single, well-defined population of organizations — the executive branches of US State governments. [less ▲]

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See detailPregnancy-Associated Glycoprotein A-62 kDa [Fragment] from Dama dama placenta - Accession number C0HJC7
Bériot, Mathilde ULg; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et al

E-print/Working paper (2013)

N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.

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See detailPregnancy-Associated Glycoprotein B-56 kDa [Fragment] from Dama dama placenta - Accession number C0HJC8
Bériot, Mathilde ULg; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et al

E-print/Working paper (2013)

N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.

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See detailPregnancy-Associated Glycoprotein C-39 kDa [Fragment] from Dama dama placenta - Accession number C0HJC9
Bériot, Mathilde ULg; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et al

E-print/Working paper (2013)

N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.

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See detailPregnancy-Associated Glycoprotein D-56 kDa [Fragment] from Dama dama placenta - Accession number C0HJD0
Bériot, Mathilde ULg; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et al

E-print/Working paper (2013)

N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.

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See detailAlpha-2-HS-glycoprotein [Fragment] from Dama dama placenta - Accession number C0HJD1
Bériot, Mathilde ULg; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et al

E-print/Working paper (2013)

N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.

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See detailSerum albumin [Fragment] from Dama dama placenta - Accession number C0HJD2
Bériot, Mathilde ULg; Tchimbou Njanjo, Aline Flora; Barbato, Olimpia et al

E-print/Working paper (2013)

N-terminal microsequence obtained after purification and characterization of placental proteins in Dama dama (fallow deer). Proteins were submitted to SwissProt databank.

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See detailUnraveling electron acceleration mechanisms in Ganymede's space environment through N-S conjugate imagery of Jupiter's aurora
Grodent, Denis ULg; Bonfond, Bertrand ULg; Gérard, Jean-Claude ULg et al

E-print/Working paper (2013)

There is strong scientific interest in Ganymede (Jupiter's third Galilean moon) and its surrounding environment, which stems from the likely presence of a liquid water ocean underneath its icy crust and ... [more ▼]

There is strong scientific interest in Ganymede (Jupiter's third Galilean moon) and its surrounding environment, which stems from the likely presence of a liquid water ocean underneath its icy crust and from its internally driven magnetic field. The interaction of the latter with Jupiter's magnetospheric plasma and its magnetic field gives rise to a unique situation in our solar system implying a mini-magnetosphere embedded within a giant-magnetosphere. This interaction generates Ganymede's ultraviolet auroral footprint in Jupiter's atmosphere. We propose to investigate the strong auroral connection between Jupiter and Ganymede and the variable characteristics of Ganymede's magnetosphere with an innovative approach, taking advantage of the large scale north-south asymmetries of Jupiter's magnetic field. The results obtained for Ganymede will be compared with the case of small injected hot plasma bubbles observed by the Galileo spacecraft and whose size and location are similar to those of Ganymede's magnetosphere. HST is currently the sole instrument capable of obtaining this information which pins down the proposed mechanisms linking the source and sink regions of auroral particles in the giant planets' magnetospheres. [less ▲]

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See detailDénommer. Regards rhétoriques sur la terminologie linguistique
[ Lttr 13 ]; Badir, Sémir ULg; Polis, Stéphane ULg et al

E-print/Working paper (2013)

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See detailQuelle école pour tous ?
Crahay, Marcel ULg; Baye, Ariane ULg; Fagnant, Annick ULg et al

E-print/Working paper (2013)

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See detailJesuit Solemnities in the Southern Netherlands : Immersion and Experience
Delfosse, Annick ULg

E-print/Working paper (2013)

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See detailÈve de Saint-Martin
Henneau, Marie-Elisabeth ULg

E-print/Working paper (2013)

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See detailLe CNSA, oeuvre purement humanitaire? Les comités locaux de secours et d'alimentation pendant la Grande Guerre
Delhalle, Sophie ULg

E-print/Working paper (2012)

Cette analyse propose un regard particulier sur le travail des membres des comités locaux de secours et d'alimentation pendant la Grande Guerre dans la région liégeoise.

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See detailSome misunderstood or unknown LaTeX tricks (VI)
Merciadri, Luca ULg

E-print/Working paper (2012)

Customizing a document class is important in the LaTeX world. We will consider two examples of this using the lettre document class. Next, we will consider a small fraction of a bigger LaTeX problem: the ... [more ▼]

Customizing a document class is important in the LaTeX world. We will consider two examples of this using the lettre document class. Next, we will consider a small fraction of a bigger LaTeX problem: the details of character encoding. [less ▲]

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See detailDominique A trois fois
Demoulin, Laurent ULg

E-print/Working paper (2012)

Triple actualité pour Dominique A: un nouveau disque, une tournée de concerts, un livre dans lequel il réfléchit, de façon ouverte et nuancée, à la question de l'identité et des origines.

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See detailComoment Risk and Stock Returns
Lambert, Marie ULg; Hübner, Georges ULg

E-print/Working paper (2012)

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See detailNancy Huston, Urgence d'écrire
Dor, Juliette ULg

E-print/Working paper (2012)

CR de "Reflets dans un œil d'homme"

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See detailLes littératures selon Nicolas Ancion
Demoulin, Laurent ULg

E-print/Working paper (2012)

Compte rendu du roman de Nicolas Ancion "La Cravate de Simenon" paru dans une collection destinée à l'apprentissage du français.

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See detailRisk Horizon and Expected Market Returns
Hübner, Georges ULg; Lejeune, Thomas ULg

E-print/Working paper (2012)

The paper proposes an equilibrium asset pricing model that accounts of the incomplete information on returns distribution and investors' preferences. Only moments up to order four of unknown unconditional ... [more ▼]

The paper proposes an equilibrium asset pricing model that accounts of the incomplete information on returns distribution and investors' preferences. Only moments up to order four of unknown unconditional distribution can be observed, and the model does not impose that portfolio diversi fication or moments preference should hold. Using Chebyshev-type of inequalities, an intuitive risk measure (risk horizon) is introduced with reference to the speed of convergence of a security's mean return to its expectations. By an arbitrage argument, this risk measure is related to the horizon of treasury securities in a system of equations that allows the calibration of the model parameters using term structure information. In particular, the expected return on the market portfolio can be endogenously estimated inside this system. The model calibration on U.S. market data provides plausible parameters estimates and interesting cyclical patterns in the time series of the expected return. The empirical relevance of these estimates is examined with tests of statistical and economic predictive ability for stock excess returns. The results provide signi ficant evidence on the added value of the estimates when compared to popular predictors found in the literature (see a.o. Lettau and Ludvigson, 2001; Rapach and Wohar, 2006; Goyal and Welch, 2008). [less ▲]

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See detailVers une typologie de la réflexivité
Demoulin, Laurent ULg

E-print/Working paper (2012)

Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont ... [more ▼]

Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont étonnamment divers, tant en ce qui concerne leur structure que les effets produits. C’est pourquoi l’on se propose de les classer en six catégories distinctes : réflexivité autotélique, réflexivité poétique, réflexivité linguistique, réflexivité de l’énonciateur, réflexivité conative et réflexivité référentielle. [less ▲]

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See detailNEW CHALLENGES FOR 21ST CENTURY COMPETITION AUTHORITIES
Petit, Nicolas ULg

E-print/Working paper (2012)

This paper discusses challenges for competition authorities in the 21st century. Those challenges were identified on the basis of a statistical review of the articles published since January 2011 in five ... [more ▼]

This paper discusses challenges for competition authorities in the 21st century. Those challenges were identified on the basis of a statistical review of the articles published since January 2011 in five major antitrust law journals. The assumption underlying this literature review is that the topics that statistically attract the most the attention from contemporary antitrust scholars are those that will likely constitute the main challenges for 21st century competition authorities. [less ▲]

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See detailOrganizational and Institutional Arrangements for e-Government: A Preliminary Report on Contemporary IT Management Approaches in US State Governments
Markus, M. Lynne; Jacobson, Dax D.; Bui, Quang Neo et al

E-print/Working paper (2012)

The success of e-government is believed to depend in part on the organizational and institutional arrangements that governments enact for the management of their IT resources. This paper develops the ... [more ▼]

The success of e-government is believed to depend in part on the organizational and institutional arrangements that governments enact for the management of their IT resources. This paper develops the conceptualization of IT management arrangements by considering possible interactions between two dimensions — 1) the organization of IT activities and 2) control over decisions about IT activities (also known as governance) — for each of two categories of IT activities — 1) IT projects (such as website development) and 2) IT services (such as the operation of networks). In addition, the paper provides preliminary empirical evidence obtained from applying this expanded conceptualization in the context of American state governments. Many states appear to employ centralization of IT activities to offset decentralization of IT control and vice versa. Consequently, neither dimension alone provides a good characterization of governmental IT management arrangements. These findings have the potential to enhance our understanding of the barriers to, and enablers of, e-government success. [less ▲]

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See detailSummer 2012 & The Blues - Chicago Blues Festival , Juin 2012
Sacré, Robert ULg

E-print/Working paper (2012)

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See detailSocial Security, Ageing and Economic Integration
Artige, Lionel ULg; Dedry, Antoine; Pestieau, Pierre ULg

E-print/Working paper (2012)

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See detailThe EMES Approach of Social Enterprise in a Comparative Perspective
Defourny, Jacques ULg; Nyssens, Marthe

E-print/Working paper (2012)

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See detailSummer 2012 & The blues 2012 pt 2 - Aurora's Blues on the Fox, June 2012
Sacré, Robert ULg

E-print/Working paper (2012)

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See detailNotes éparses d'un lecteur enthousiaste
Demoulin, Laurent ULg

E-print/Working paper (2012)

Compte rendu de "Carnet de Corée", ouvrage de Serge Delaive, mêlant littérature et photographies au sujet de trois voyages effectués en Corée sur les traces de la mère de sa compagne.

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See detailDe nieuwe fiscale antimisbruikregel en de gevolgen voor vermogensplanning
Bourgeois, Marc ULg; Nollet, Aymeric ULg

E-print/Working paper (2012)

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See detailA New Shift-Share Method
Artige, Lionel ULg; Van Neuss, Leif ULg

E-print/Working paper (2012)

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See detailWanted ! Avez-vous vu ces plantes ? La conservation des plantes messicoles dans le cadre du Programme Agroenvironnemental wallon
Piqueray, Julien ULg; Gilliaux, Valentin ULg; Mahy, Grégory ULg

E-print/Working paper (2012)

Afin de mener à bien un projet de conservation des plantes messicoles menacées, la Faculté AgroBioTech de Gembloux appelle à diffuser vos observations de terrain au DEMNA

Detailed reference viewed: 27 (3 ULg)