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Peer Reviewed
See detailEcomorphology and Iterative Ecological Radiation of Damselfishes
Frederich, Bruno ULg; Cooper, W. James; Aguilar-Medrano, Rosalia

in Frederich, Bruno; Parmentier, Eric (Eds.) Biology of Damselfishes (2016)

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailEcomorphology of the Pomacentridae skull: a landmark-based geometric morphometric approach
Pilet, Arnaud; Frederich, Bruno ULg; Parmentier, Eric ULg et al

Poster (2005, October)

Detailed reference viewed: 25 (2 ULg)
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Peer Reviewed
See detailEcomorphology of the vertebral column: preliminary study
Gillet, Amandine; Ninane, Catherine; Zaeytydt, Esther et al

Poster (2014, April)

Detailed reference viewed: 38 (7 ULg)
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Peer Reviewed
See detailAn Econometric Analysis of Homeownership Determinants in Belgium
Xhignesse, Guillaume ULg; Bianchet, Bruno ULg; Cools, Mario ULg et al

in Lecture Notes in Computer Science (2014, July), 8581

In market economies, homeownership is associated with positive ex- ternalities. Increasing the levels of homeownership has been an objective of governments for the last decades. The analysis of the ... [more ▼]

In market economies, homeownership is associated with positive ex- ternalities. Increasing the levels of homeownership has been an objective of governments for the last decades. The analysis of the determinants of tenure sta- tus provides information to this end. This paper proposes an econometric analysis of housing tenure in Belgium. We review the main variables that have been considered in the literature as influencing housing tenure, after what we estimate a logit model. We observe a strong influence of income and age on the probability of homeownership. Couple relationship and the presence of dependent children have a positive influence, but this influence is less significant. Urban location is associated with lower probability of homeownership, compared with other areas. Our observations follow the trends described for other countries in the literature. [less ▲]

Detailed reference viewed: 101 (38 ULg)
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See detailÉconométrie du droit de la concurrence, un essai de conceptualisation
Fegatilli, Ermano ULg; Petit, Nicolas ULg

in Revue Internationale de Droit Economique (2009), I

The present paper reviews in a plain language and with only limited statistical formalization, the virtues of econometrics in the field of competition law. Following a brief introduction to the origins of ... [more ▼]

The present paper reviews in a plain language and with only limited statistical formalization, the virtues of econometrics in the field of competition law. Following a brief introduction to the origins of econometrics, we explain first that econometrics provides assistance to decision-making in a variety of fields (merger control, abuse of dominance, etc.). Second, we show that econometrics also constitute a decision-reading instrument, which may assist competition agencies, courts, firms and their counsels in understanding the content of the law. The econometric models discussed in the paper are illustrated by examples coming from well-known legal cases. Our conclusion is that in light of the novel sophisticated issues arising in antitrust enforcement (damages estimation, etc.), the nascent "econometrics of competition law" exhibit promising features. [less ▲]

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See detailEconométrie I
Lejeune, Bernard ULg

Learning material (2011)

Detailed reference viewed: 254 (23 ULg)
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Peer Reviewed
See detailLa economia social y cooperativa en la revista del Ciriec, Anales de economia publica y cooperativa
Fecher-Bourgeois, Fabienne ULg; Lévesque, Benoit

in Revista Cooperativismo & Desarrollo (2012), 20(100), 24-56

Detailed reference viewed: 39 (14 ULg)
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See detailEconomic analysis of Stainless Steel- Reinforced Concrete members designed for a Fire Resistance of 2 hours
Gernay, Thomas ULg; Franssen, Jean-Marc ULg

Report (2011)

While Stainless steel is used primarily for its corrosion resistance, there is a growing interest in other properties, such as mechanical, high temperature resistance, aesthetics and others. The ... [more ▼]

While Stainless steel is used primarily for its corrosion resistance, there is a growing interest in other properties, such as mechanical, high temperature resistance, aesthetics and others. The properties at high temperatures (400 – 650°C ) of stainless steels are known and put to use in a number of applications such as steam turbines and equipment for the chemical industry. Some research on the fire resistance of stainless steels has been carried out for welded I beams and for concrete-filled tubes, with positive results. However, there are no published results on the behavior of concrete reinforced with stainless steel rebar. In a preliminary research program conducted by the University of Liege for ISSF, a preliminary assessment of the performance of stainless steel reinforced concrete has been carried out, using computer simulation methods. This preliminary study has shown that stainless steel reinforced concrete members can behave better than carbon steel reinforced concrete members in fire situation. However, an economic analysis is still needed to determine whether stainless steel reinforcement can be interesting for practical applications. This report is divided in two parts. The first part presents the assumptions and the results of the numerical simulations performed by University of Liege. The numerical simulations aim to design stainless and carbon steel -reinforced concrete members satisfying to a fire resistance of 2 hours (Standard fire conditions). The two structural members considered in this study are a reinforced concrete beam and a composite slab (with the so-called « membrane » behavior). The numerical simulations are performed with the SAFIR 20011.a.3 software developed in University of Liege. The second part presents the assumptions and the results of the economic analysis of the structural members designed in the first part. The stainless and carbon steel –reinforced solutions for a fire resistance of 2 hours are compared on an economic basis. [less ▲]

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Peer Reviewed
See detailEconomic and Economical Statistical Design of Hotelling’s T2 Control Chart with Two-State Adaptive Sample Size
Faraz, Alireza ULg; Saniga, Erwin; kazemzadeh, R. B.

in Journal of Statistical Computation & Simulation (2010), 80(12), 12991316

The Hotelling’s T 2 control chart, a direct analogue of the univariate Shewhart ¯X chart, is perhaps the most commonly used tool in industry for simultaneous monitoring of several quality characteristics ... [more ▼]

The Hotelling’s T 2 control chart, a direct analogue of the univariate Shewhart ¯X chart, is perhaps the most commonly used tool in industry for simultaneous monitoring of several quality characteristics. Recent studies have shown that using variable sampling size (VSS) schemes results in charts with more statistical power when detecting small to moderate shifts in the process mean vector. In this paper, we build a cost model of a VSS T 2 control chart for the economic and economic statistical design using the general model of Lorenzen and Vance [The economic design of control charts: A unified approach, Technometrics 28 (1986), pp. 3–11].We optimize this model using a genetic algorithm approach.We also study the effects of the costs and operating parameters on theVSS T 2 parameters, and show, through an example, the advantage of economic design over statistical design forVSS T 2 charts, and measure the economic advantage of VSS sampling versus fixed sample size sampling. [less ▲]

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Peer Reviewed
See detailThe economic and environmental feasibility of biogas buses in Liege
Mostert, Martine ULg; Limbourg, Sabine ULg

in 2013 BIVEC-GIBET Transport Research Days - Proceedings (2013, May 30)

Everyday, many students at the University of Liège have to drive to the Sart-Tilman village to attend their courses. These journeys are responsible for the emission of harmful particles which have ... [more ▼]

Everyday, many students at the University of Liège have to drive to the Sart-Tilman village to attend their courses. These journeys are responsible for the emission of harmful particles which have negative impacts on climate and human health. This paper analyzes the economic and environmental feasibility of using biogas buses for public transport in Liège. The idea of implementing biogas buses is based on the proposed recycling of organic waste by the company INTRADEL, which manages and treats waste in the region. The economic and environmental advantages and drawbacks of biogas buses are developed and compared with those of the current diesel bus fleet. The main conclusion of this study is that, while internalizing external costs due to pollution, the use of biogas buses becomes an attractive option compared with classical diesel buses. Nevertheless, it requires investment and might lead to resistance to change. However, it remains a good solution for the reduction of CO2 emissions. [less ▲]

Detailed reference viewed: 119 (17 ULg)
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See detailEconomic and environmental impacts of several retrofit options for residential buildings
Gendebien, Samuel ULg

Master's dissertation (2011)

Nowadays, important efforts are deployed to reduce our actual residential building consumption which represents about 40% (25% for the residential sector and 15% for the non-residential sector) of the ... [more ▼]

Nowadays, important efforts are deployed to reduce our actual residential building consumption which represents about 40% (25% for the residential sector and 15% for the non-residential sector) of the total energy consumption in Europe. The aim of this paper is to evaluate the environmental and economical impact of several retrofit options for residential buildings. Our study focuses on the Walloon Region of Belgium. A “bottom-up” methodology is applied: this methodology focuses first on a micro-analysis. Results from this micro-analysis are then used and extended to a macro-analysis. The presented methodology does not permit to determine with precision the global consumption of residential buildings in the Walloon Region. However, the latter methodology allows pointing out some economical and environmental trends related to the different investigated retrofit options. The first part of this end-of-study work offers an overview of the Walloon building stock by presenting statistic data on the Walloon residential houses. From these latter statistic data, it is possible to divide the Walloon building stock by means of arborescence. Each type of building is characterized by constructive data (mean area, Uwall, Uwindow…) and by heating production system efficiency. Thanks to these data, it is possible to determine the gas and electrical annual consumption for each type of residential building by means of a computer program that simulates residential building. The latter computer program is also used to determine the annual energy consumption of envelope retrofitted houses. Retrofit options related to heat and/or cool production are also investigated. A macro-point of view study is carried out in order to determine the potential of energy saving of each investigated options. An environmental comparison between the several envisaged retrofit options is realized in terms of CO2 emission, final and primary annual energy consumption for each type of building. An economical study is carried out in order to determine the profitability of each investigated options for citizens. The work also proposes a reflection about the actual incentive policies. [less ▲]

Detailed reference viewed: 51 (20 ULg)
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See detailEconomic and financial crisis and pooling of military resources
Dumoulin, André ULg

in Europe Diplomatie and Defence (2010), (326), 2

Detailed reference viewed: 6 (1 ULg)
Peer Reviewed
See detailEconomic and Production Consequences of Liver Fluke Disease in Double-Muscled Fattening Cattle
Genicot, Bruno; Mouligneau, Frédéric; Lekeux, Pierre ULg

in Zentralblatt für Veterinarmedizin. Reihe B = Journal of Veterinary Medicine. Series B (1991), 38(3), 203-208

The frequency of liver fluke disease in fattening units was determined by the analysis of random faeces samples issued from 1,513 Belgian White Blue bulls aged from 5 to 7 months and weighing from 200 to ... [more ▼]

The frequency of liver fluke disease in fattening units was determined by the analysis of random faeces samples issued from 1,513 Belgian White Blue bulls aged from 5 to 7 months and weighing from 200 to 300 kg. 12.5% of the investigated bulls were positive for liver fluke disease. These bulls were spread over 56.5% of the investigated fattening units. Furthermore the infestation rate varied from 0 to 33.3% inside the fattening units. In order to assess the economic consequences of bovine fascioliasis in double-muscled cattle and the beneficial effects of a treatment against such a disease, a trial including 30 Belgian White Blue bulls, weighing 365 +/- 9 kg and aged from 10 to 12 months, was conducted in a selected fattening unit. On the basis of faecal examinations, the 30 animals were subdivided in negative (group A; n = 10) and positive animals (n = 20) for fascioliasis, the latter being either treated with nitroxinil (group B; n = 10) or not (group C; n = 10) on day 0 of this trial which was conducted during 75 days. The daily body gains in group C (1.661 +/- 0.140 kg) were significantly lower than those in group A (1.975 +/- 0.120 kg). On the other hand there was no significant difference between the daily body gains registered in group B (1.960 +/- 0.085 kg) and A. The estimated financial loss, due to flukes and accounted on a 75 day-period, averaged 2,748 Belgian Francs per bull in group C.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

Detailed reference viewed: 36 (1 ULg)
Peer Reviewed
See detailEconomic and Production Repercussions of Deworming by Pulse Release Device and Oral Suspension in Grazing Double-Muscled Fattening Cattle
Genicot, Bruno; Mouligneau, Frédéric; Lekeux, Pierre ULg

in Zentralblatt für Veterinarmedizin. Reihe B = Journal of Veterinary Medicine. Series B (1991), 38(3), 238-240

In this field trial, the repercussions of 2 administration forms of oxfendazole, namely a single administration of a front-loaded device (group 1; n = 18) and a repeated administration of a 90.6 per cent ... [more ▼]

In this field trial, the repercussions of 2 administration forms of oxfendazole, namely a single administration of a front-loaded device (group 1; n = 18) and a repeated administration of a 90.6 per cent oral suspension (group 2; n = 18), were compared in first season-grazing double-muscled fattening bulls. The comparison was based on the production performances, the mean worm egg counts and the product- and labour-costs. The daily body gains determined on the whole trial period, i.e. 1.312 +/- 0.055 kg and 1.270 +/- 0.056 kg for groups 1 and 2 respectively, and mean worm egg counts per gram (on days 0 and 130:200.0 +/- 44.3 and 94.4 +/- 27.4 for group 1; 366.7 +/- 98.4 and 100.0 +/- 33.6 for group 2) did not differ significantly between the two groups. However, the total costs were lower with a front-loaded device (1,021 Belgian Francs) than with oral suspension (1,248 Belgian Francs per bull). [less ▲]

Detailed reference viewed: 10 (1 ULg)
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See detailThe Economic and Statistical Designs of Control charts for Censored and Non-Normal Data
Faraz, Alireza ULg; Heuchenne, Cédric ULg; Davis, Darwin, Edward et al

Scientific conference (2011, December)

In this research, we are dealing with constructing the statistical design (SD) and economic statistical design (ESD) of Shewhart and CUSUM control charts for reliability data which are right censored ... [more ▼]

In this research, we are dealing with constructing the statistical design (SD) and economic statistical design (ESD) of Shewhart and CUSUM control charts for reliability data which are right censored. This is the case which happens more frequently in the field. [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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Peer Reviewed
See detailAn Economic Appraisal of MOOC Platforms: Business Models and Impacts on Higher Education
Jacqmin, Julien ULg; belleflamme, paul

in CESifo Economic Studies (2016), 62(1), 148-169

We use various economic and pedagogical concepts to understand the specificities of MOOC (Massive Online Open Courses) platforms. We discuss how the private provision of MOOCs can be sustained. Using the ... [more ▼]

We use various economic and pedagogical concepts to understand the specificities of MOOC (Massive Online Open Courses) platforms. We discuss how the private provision of MOOCs can be sustained. Using the theory of multisided platforms, we analyze five ways to monetize the MOOC business. 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 [less ▲]

Detailed reference viewed: 39 (3 ULg)
Peer Reviewed
See detailEconomic assessment of energy storage for load shifting in Positive Energy Building
Dumont, Olivier ULg; Carmo, carolina; Georges, Emeline ULg et al

Conference (2016)

Detailed reference viewed: 45 (5 ULg)
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See detailAn economic case for transnational and international transmission
Ernst, Damien ULg

Speech/Talk (2015)

Detailed reference viewed: 80 (11 ULg)
See detailEconomic Design of Control Charts In Presence of Censored Data
Faraz, Alireza ULg; Heuchenne, Cédric ULg

Speech/Talk (2011)

we present Shewhart type Z ̅ and S2 control charts for monitoring individual or joint shifts in the scale and shape parameters of a Weibull distributed process. The advantage of this method is its ease of ... [more ▼]

we present Shewhart type Z ̅ and S2 control charts for monitoring individual or joint shifts in the scale and shape parameters of a Weibull distributed process. The advantage of this method is its ease of use and flexibility for the case where the process distribution is Weibull, although the method can be applied to any distribution. We illustrate the performance of our method through simulation and the application through the use of an actual data set. Our results indicate that Z ̅ and S2 control charts perform well in detecting shifts in the scale and shape parameters. We also provide a guide that would enable a user to interpret out-of-control signals. [less ▲]

Detailed reference viewed: 15 (0 ULg)