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article dans une conférence
A paper, published within a conference proceeding, typically the realization of a research paper reporting original research findings. [Source: Adapted from]
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article dans une conférence
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Résultats de recherche

Voici les éléments 1 - 10 sur 160
  • PublicationRestreint
    Toward decision theater design for community forest management & planning : the case of Québec
    (2016-08-21) Rönnqvist, Mikael; Boukherroub, Tasseda; D'Amours, Sophie
    A generic framework for designing decision theaters (DTs) is proposed. The implementation of this framework is illustrated on community forest management in the province of Québec. In particular, we develop the conceptual design of an integrated Forest Community Decision Support System (FC-DSS). FC-DSS aims at supporting complex forest management planning that involves governmental planners and multiple forest users.
  • PublicationRestreint
    FUNii : The Physio-behavioural adaptive video game
    (Springer Nature, 2019-06-20) Jackson, Philip L.; Chamberland, Cindy; Beaudoin-Gagnon, Nicolas; Desbiens, Frédéric; Campeau-Lecours, Alexandre; Lefebvre, Ludovic; Fortin-Côté, Alexis; Bergeron-Boucher, Jérémy; Tremblay, Sébastien
    This paper investigates the use of physio-behavioural detection of fun to model players’ preferences in real-time in the context of an adaptive game. To do so, a Physiological and Behavioural Model of Fun (PBMF), previously trained on 218 players, was used to model players’ preferences based n gameplay events. As a proof-of-concept, we leverged the PBMF to generate a simple player’s preference profile tailored to our test-bench game: Assassin’s Creed: Odyssey, an open-world, action-adventure game. This model associated every player to one of 3 predetermined stereotypical types of player, namely Fight, Stealth and Explore, which are closely tied to mechanics of the Assassin’s Creed series. Using the inferred preferences, we compared an adaptive vs a non-adaptive version of the same game and tested whether the adaptive version was perceived as more fun than the non-adaptive version by the 39 participants of this study. The results point to the creation of an accurate player’s preference profiles during a baseline mission, with profile matching both a “ground truth” Fun Trace – a continuous, subjective rating of a player’s fun – and a self-reported profile with an accuracy of 69% and 72% respectively. This, however, did not translate into a measurable difference in reported fun between the adaptive version of the game and the non-adaptive version in neither Fun Trace ratings nor questionnaire answers. Theses findings support that stereotypical preference modelling can be achieved successfully through a physio-behavioural model of fun, but that further investigation on adaptation strategies to those preferences are needed in order to reach the adaptive game’s promise of maximizing player’s enjoyment.
  • PublicationRestreint
    Chloride diffusion in cement materials at different leaching states : an experimental and numerical study
    (American Society of Civil Engineers, 2019-08-08) Henocq, Pierre; Conciatori, David; Aït-Mokhtar, K.; Sanchez, Thomas; Millet, O.
    Due to common heavy snowfall in winter, concrete structures in cold countries are regularly in contact with water. Hence, concrete undergoes abnormal leaching of ionic species present inside the liquid pores of the material. The leaching slowly degrades the structures and may have an influence on the diffusive properties of the chloride ions, coming from the de-icing salts and responsible for the corrosion of the steel reinforcements present in the reinforced concrete. In this work, an experimental and numerical study is propounded to better understand the influence of the leaching state of cementitious material on the diffusive behaviour of chloride ions. Natural and accelerated diffusion tests were performed on samples of hydrated cement paste and concrete samples with lower chloride concentrations (50 mol/m3). The materials were conserved at different leaching state with care not to degrade the microstructure: safe (S), partially leached (PL), and leached (L). The simulation of those various tests was carried out on the reactive transport software PhreeqC to quantify the chloride diffusion. This numerical model allows distinguishing the influence of the geometry of the material (porosity, tortuosity, constrictivity…) to the chemical reactions occurring between chloride ions and the cementitious phases. It then appeared that chloride ions do not diffuse in the same way depending on the leaching state of the cementitious material. Same observations are made on hydrated cement paste and concrete samples. In a safe material, the chloride ions diffuse slowly than in a leached material. It seems not to be due to the material geometry nor chemical reactions. The numerical model developed confirms this hypothesis as it allows to distinguish and quantify their both influence on the chloride diffusion. This study, therefore, highlights the importance of considering the leaching effects in the prediction model for concrete structure durability in cold countries.
  • PublicationRestreint
    Assessing rock mass UCS anisotropy using a coupled DFN-DEM approach at a surface mining project in Artic Canada
    (2014-10-01) Kapinga Kalala, Iris; Grenon, Martin; Bruneau, Geneviève.
    A coupled DFN-DEM approach was used to evaluate the anisotropy of rock mass mechanical compressive strength (UCS) at Representative Elemental Volume (REV) at the feasibility stage of an open pit mining project located in Nunavut Territory in northern Canada. The paper presents modelling work performed to define the rock mass UCS based on field data and on laboratory testing results. In particular, the influence of the in-situ rock mass structural properties variations on the rock mass UCS is studied. To begin with, a discussion is presented on the difficulty to account for the anisotropy of the rock mass UCS at engineering scale. Coupled DFN-DEM modelling was shown to be useful although still rarely used mainly due to computing time limitation. In this paper, the modelling workflow is outlined. DFN modelling results are presented - several DFNs were modelled to fully represent the spectrum of possible structural regimes at the site. The DFN-DEM calibration process for simulating rock mass samples at REV size is also presented. DFN-DEM models were created for all generated DFNs – representing the observed spectrum of the structural rock mass properties. The rock mass UCS was evaluated for all samples and the anisotropy of the rock mass UCS was then calculated. The results suggest that for this mining site, the rock mass at REV size is strongly anisotropic. Furthermore, they suggest that the rock mass structural variability significantly affects the rock mass anisotropy. The results not only highlight the possibilities associated with DFNDEM modelling in characterizing rock mass anisotropy at the engineering scale, they also provide a systematic way to assess the variability in rock mass properties anisotropy for engineering works.
  • PublicationRestreint
    Supply chain planning in the pulp and paper industry
    (PAPTAC, 2005-02-08) Martel, Alain; Frayret, Jean-Marc; D'Amours, Sophie
    In this paper we propose a generic planning model for the pulp and paper supply chain. We first review the different business units of the supply chain and the material flows. We then propose a supply chain and paper industry. We further extend the discussion by adressing the difficult problem of distributed planning, even in a hierarchically organized system. To conclude, we propose a multi-agent framework to simulate different configurations of supply chain and anticipate the impact of the different decision models used by the different business units of the supply chain.
  • PublicationAccès libre
    Intuitive adaptive orientation control of assistive robots for people living with upper limb disabilities
    (IEEE, 2017-08-15) Gosselin, Benoit; Gosselin, Clément; Routhier, François; Campeau-Lecours, Alexandre; Vu, Dinh-Son; Côté Allard, Ulysse
    Robotic assistive devices enhance the autonomy of individuals living with physical disabilities in their day-to-day life. Although the first priority for such devices is safety, they must also be intuitive and efficient from an engineering point of view in order to be adopted by a broad range of users. This is especially true for assistive robotic arms, as they are used for the complex control tasks of daily living. One challenge in the control of such assistive robots is the management of the end-effector orientation which is not always intuitive for the human operator, especially for neophytes. This paper presents a novel orientation control algorithm designed for robotic arms in the context of human-robot interaction. This work aims at making the control of the robot's orientation easier and more intuitive for the user, in particular, individuals living with upper limb disabilities. The performance and intuitiveness of the proposed orientation control algorithm is assessed through two experiments with 25 able-bodied subjects and shown to significantly improve on both aspects.
  • PublicationAccès libre
    Silicon photonic modulator using mode conversion with asymmetric sidewall bragg gratings
    (IEEE, 2018-10-04) Jafari, Omid; LaRochelle, Sophie; Shi, Wei
    An asymmetric sidewall grating allows to operate a Bragg modulator in reflection without circulator and with less than 1.5 dB on-chip loss. An asymmetric Y-branch directs the incident TE0 mode to the grating, while the reflected TE1 mode is guided to the drop port.
  • PublicationRestreint
    Chloride penetration model considering the microclimate
    (American Society of Civil Engineers, 2012-04-26) Conciatori, David; Denarié, Emmanuel; Sadouki, Hamid; Brühwiler, Eugen
    Two main factors govern the ingress of chloride ions into concrete reinforced with ordinary steel reinforcement, from de-icing salts: (1) the cover concrete (permeability, thickness), and (2) the microclimatic conditions (humidity, temperature, concentration of de-icing salts) at the concrete surface. A numerical model of chloride transport, taking into consideration environmental conditions (temperature, humidity, snow, rain and salt spreading), was used to predict the chloride profiles in concrete representative of that found in bridge element, for two types of exposure to water (splash, mist). This model was applied for two different regions in Switzerland: on the plateau in Lausanne, where there is a relatively mild winter climate and in the Alps where there is severe winter climate.
  • PublicationRestreint
    Building shared value park to develop sustainable business model in the canadian forest products industry
    (Université Laval, 2015-10-26) Naud, Marie-Philippe; Carle, Marc-André; D'Amours, Sophie
    Cet article propose un nouveau concept de parc industriel à valeur partagée basé sur la collaboration entre plusieurs intervenants, orienté vers l’innovation marché et visant la création de bénéfices sociaux. Il expose le résultat d’une première étape reliée à une méthodologie de recherche basée sur la conception comprenant une revue de la littérature décrivant divers types de parcs existants et s’adaptant au contexte de l’industrie forestière Canadienne. L’idée du Shared Value Park représente une solution répondant aux enjeux du développement durable et à la conjoncture actuelle des marchés des produits du bois en permettant aux entreprises impliquées de transformer leur modèle d’affaires et en facilitant la mise en place de stratégies de diversification. Le type de collaboration retrouvée sur le parc accéléra le développement de bioproduits, issus de la biomasse forestière, tout en permettant de résoudre les défis d’investissement, d’innovations et de développement des marchés visés. La structure du parc proposé permet la création de prospérité, d’avantage concurrentiel durable et la croissance économique recherchés. Bien qu’aucune étude de cas n’ait encore été complétée, une discussion concernant des avenues de recherches se rapportant aux outils à développer permettant de le faire termine le document
  • PublicationRestreint
    A contribution to financial and geomechanical pit optimisation
    (Reading Matrix, 2012-11-01) Grenon, Martin; Ngoma Bolusala, Christian
    Surface mine financial optimisation and geomechanical design are not well integrated. This paper presents a case study where both the net present value (NPV) and the design of slopes, for various ultimate pit scenarios, were assessed based on the geological block model. In the first stage, the stability of the excavations was evaluated using limit equilibrium techniques. This resulted in the construction of susceptibility maps based on the factor of safety (FS) and the probability of failure (PF). The financial and geomechanical benefits associated with different scenarios were employed to arrive at an optimised design.