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Integrated Optimization on Double-Side Cantilever Yard Crane Scheduling and Green Vehicle Path Planning at U-Shaped Yard
No full textInternational audienceThe U-shaped yard is an important part of the U-shaped automated container terminal (U-ACT), which consists of a set of blocks used for storing containers, I-lanes for automated guided vehicles (AGVs) travel, and U-lanes for external trucks (ETs) travel. Double-side cantilever yard cranes (DCYCs) perform stacking and unstacking operations for containers transported by AGVs and ETs. Managing and coordinating the operations of DCYC, AGVs, and ETs, not only improves the operation efficiency of U-ACTs but also helps to promote the development of green ports. This paper addresses the problem of scheduling DCYCs and path planning for AGVs and ETs in the U-ACT. To achieve this, we establish a bi-objective mixed integer programming model to minimize both the makespan and the energy consumption. The model considers conflicts between two DCYCs within each block, ensures workload balance for these DCYCs, optimizes parking slots for AGVs and ETs, and schedules appropriate entry times for AGVs and ETs into the yard to reduce conflicts. To solve this model, we develop an improved multi-objective particle swarm optimization (IMOPSO) algorithm, where a globally optimal heuristic search mechanism and several conflict avoidance strategies to plan conflict-free spatiotemporal paths are introduced to accelerate the convergence of the algorithm. Numerical experiments demonstrate the superiority of the IMOPSO approach in terms of multiple metrics, confirming the effectiveness of the optimized vehicle entry timing strategy, which improves efficiency by 7.33% and yields energy savings by 11.72%. These findings clearly highlight that our model and solution approach can effectively enhance the operational efficiency of DCYCs, AGVs, and ETs, contributing to the overall improvement of container terminal operations
Interdependence of plasma membrane nanoscale dynamics of a kinase and its cognate substrate underlies Arabidopsis response to viral infection
No full textInternational audiencePlant viruses represent a risk to agricultural production and as only a few treatments exist, it is urgent to identify resistance mechanisms and factors. In plant immunity, plasma membrane (PM)-localized proteins play an essential role in sensing the extracellular threat presented by bacteria, fungi or herbivores. Viruses are intracellular pathogens and as such the role of the plant PM in detection and resistance against viruses is often overlooked. We investigated the role of the partially PM-bound Calcium-dependent protein kinase 3 (CPK3) in viral infection and we discovered that it displayed a specific ability to hamper viral propagation over CPK isoforms that are involved in immune response to extracellular pathogens. More and more evidence support that the lateral organization of PM proteins and lipids underlies signal transduction in plants. We showed here that CPK3 diffusion in the PM is reduced upon activation as well as upon viral infection and that such immobilization depended on its substrate, Remorin (REM1.2), a scaffold protein. Furthermore, we discovered that the viral infection induced a CPK3-dependent increase of REM1.2 PM diffusion. Such interdependence was also observable regarding viral propagation. This study unveils a complex relationship between a kinase and its substrate that contrasts with the commonly described co-stabilisation upon activation while it proposes a PM-based mechanism involved in decreased sensitivity to viral infection in plants
Functional, hedonic, and social motivated consumer innovativeness as a driver of word-of-mouth in smart object early adoptions: an empirical examination in two product categories
No full textFNEGE 3, ABS 2International audienceThis research aims to consider, in the context of smart objects, the interplay of motivated consumer innovativeness (MCI), satisfaction, and word-of-mouth (WOM). Following earlier behavioral research through three phases of attitudes (cognition, affection, and conation), the study proposes that functional, hedonic, and social MCI (cognition) are positively related to satisfaction (affection), thus positively influencing WOM engagement (conation). In addition, it is shown that functional and hedonic MCI moderate the relationship between social MCI and satisfaction. Two quantitative studies across two smart object categories (1129 users of wearables and 511 users of smart home objects) highlight that both functional and hedonic MCI positively relate to satisfaction and WOM. Though the effect of social MCI on satisfaction is non-significant for smart home objects and very low for wearables, our findings confirmed that social MCI has an indirect impact on satisfaction through functional and hedonic MCI in both product categories
Lutter syndicalement contre la souffrance au travail, un sport de combat
No full textInternational audienc
Passage à l’échelle des entreprises sociales : le cas des innovations sociales numériques
No full textFNEGE 2International audienceWhile a significant body of research examines how offline social enterprises scale social impact, research on scalingin the case of digital social innovations is limited. This is an important issue to address because digital socialenterprises have different resources at their disposal, which may facilitate or hinder various scaling strategiesused by social enterprises. Distinguishing between three scaling strategies (scaling out, scaling up, scaling deep),we develop indicators to account for scaling in digital social enterprises. Using these indicators, we carry outa clustering analysis on a dataset composed of 189 civic engagement platforms in Europe. Our research revealsthree types of platforms in terms of their scaling orientations, which are grassroots, technology provision, and data-based.Muchas investigaciones examinan cómo las empresas sociales offline amplían su impacto social, pero pocasinvestigan como escalan las innovaciones sociales digitales. Es una cuestión esencial porque las empresassociales digitales disponen de recursos específicos que pueden facilitar o dificultar las estrategias de ampliaciónde empresas sociales. Distinguiendo entre tres estrategias para escalar (en términos de ámbito, alcance yraíces), desarrollamos indicadores para dar cuenta como escalan las empresas sociales digitales. Con estosindicadores llevamos a cabo un análisis de agrupación en datos sobre 189 plataformas de compromiso cívico enEuropa. Nuestra investigación revela tres tipos de plataformas en términos de sus orientaciones deampliación: de base, de provisión de tecnología, y las basadas en datos.De nombreux travaux examinent comment les entreprises sociales hors ligne augmentent leur impact social, maispeu analysent comment les innovations sociales numériques accroissent leur impact. Cette question est importante car les entreprises sociales numériques disposent de ressources spécifiques pouvant faciliter ou entraver les stratégies de passage à l’échelle des entreprises sociales. Trois stratégies de passage à l’échelle (par le champ d’action, la portée, et l’enracinement) nous permettent de développer des indicateurs sur le passage à l’échelle des entreprises sociales numériques, qui nous amènent à analyser la concentration des données de 189 plateformesd’engagement civique en Europe. Nous identifions trois types de plateformes au passage à l’échelle spécifique :les plateformes communautaires, celles fournissant des technologies, et celles basées sur les données
Transitions musicales et volets dans les deux premières trilogies Star Wars : John Williams, faire entendre l’image
No full textInternational audienc
Optimal growth models under Rawlsian criteria
No full textThis article revisits the optimal growth with three distinct Rawlsian approaches: (1) the original Rawlsian criterion, popular in economic literature; (2) the maximin with multiple discount factors, introduced by Chambers and Echenique (2018); (3) the rank-dependent criterion, applied by Zuber and Asheim (2012) to growth theory. Finally, we develop a new approach based on a convex combination of the most common criteria: Ramsey-Cass-Koopmans and Rawls
Teleoperation Control of Humanoid Robot Wheeled Chassis Based on Plantar Pressure Perception
No full textInternational audienceTo enhance the intuitiveness and naturalness of teleoperation control for a humanoid robot's wheeled chassis, this paper introduces a teleoperation control system based on plantar pressure-sensing shoes and presents a novel mapping strategy. This strategy captures the user's movement intentions by utilizing the plantar pressure sensors, enabling remote control of the humanoid robot's wheeled chassis through shifts in the user's center of gravity, without requiring physical movement. Consequently, we designed and executed experiments to collect and analyze plantar pressure data, followed by polynomial fitting to establish the specific mapping function. The experimental results demonstrate that the system is highly responsive and that the nonlinear model more accurately represents the mapping process
Energy policies, education and Sustainable Development Goals applied to low developed countries - a symbiotic case study
No full textInternational audienceEnergy, its use and management, weighs heavily on the burden that each society can impose on a fragile balance of nature, with implications not only environmental and financial, but also social, creating jobs and improving quality of life. Devising strategies that combine these three factors are a valuable option that will yield good results, meeting the challenge of fulfilling the Sustainable Development Goals (SDGs). The most important thing is to implement the old maxim: "no one is left behind", so low developed countries are an opportunity to achieve impressive results, while allowing them to improve their way of life and their comfort. It’s often said that ‘action begets reaction’, so any positive action taken in the community can have social repercussions, such as improving the quality of education and knowledge about sustainability. This study will provide an overview of how energy management and environmental mitigation strategies can impact underdeveloped countries