In this article, we address the numerical solution of the Dirichlet problem for the three-dimensional elliptic Monge–Ampère equation using a least-squares/relaxation approach. The relaxation algorithm allows the decoupling of the differential operators from the nonlinearities. Dedicated numerical solvers are derived for the efficient solution of the local optimization problems with cubicly nonlinear equality constraints. The approximation relies on mixed low order finite element methods with regularization techniques. The results of numerical experiments show the convergence of our relaxation method to a convex classical solution if such a solution exists; otherwise they show convergence to a generalized solution in a least-squares sense. These results show also the robustness of our methodology and its ability at handling curved boundaries and non-convex domains.
A passenger centric timetable is such a timetable that the satisfaction of the passengers is maximized. However, these timetables only maximize the probability of a passenger to take the train, but provide no insight on the actual choices of the passengers. Therefore, in this manuscript we replace the deterministic passenger satisfaction function with a probabilistic demand forecasting model inside of the passenger centric train timetable design. The actual forecasts lead to a realistic train occupation. Knowing the train occupation, we can estimate the revenue and to use pricing as a mobility management to further improve the level-of-service. We use a logit model that we calibrate to reflect the known demand elasticities. We further include a competing operator as an opt-out option for the passengers. Subsequently, we integrate the passenger centric train timetabling problem with a ticket pricing problem. We solve the elastic passenger centric train timetabling problem for various types of timetables using a simulated annealing heuristic on a case study of Israeli Railways. The results of our case study show that the generated revenues can be increased by up to 15% when taking into account the passengers’ behavior along with a specific pricing scheme. This study further confirms the advantages of hybrid cyclicity.
Ethics by Design concerns the methods, algorithms and tools needed to endow autonomous agents with the capability to reason about the ethical aspects of their decisions, and the methods, tools and formalisms to guarantee that an agent’s behavior remains within given moral bounds. In this context some questions arise: How and to what extent can agents un-derstand the social reality in which they operate, and the other intelligences (AI, animals and humans) with which they co-exist? What are the ethical concerns in the emerging new forms of society, and how do we ensure the human dimen-sion is upheld in interactions and decisions by autonomous agents?. But overall, the central question is: “Can we, and should we, build ethically-aware agents?”
Since the mid 90’s, the business model concept has gained prominence as a unit of analysis in innovation studies. A growing consensus among scholars reveals that business model innovation is key to firm performance, which has brought scholars researching business model to focus on issues related to business model renewal and innovation in incumbent firms (e.g. Chesbrough, (2007) and (Johnson, Christensen, & Kagermann, 2008). Despite the growing popularity of the term, the study of business model innovation remains difficult due to the ambiguity and diversity of its definitions, components, antecedents, and outcomes. More research is needed to clarify “the mechanisms and processes of business model innovation and change” (George & Bock, 2011: 88). These challenges reveal the need for a better understanding of the meaning and operationalization of this construct (Chesbrough, 2010). This article proposes a conceptualization of business model innovation as a dynamic capability that ultimately enhances a firm's ability to gain and sustain a competitive advantage. The research claims that dynamic capabilities are embedded in organizational processes and catalyze organizational change (see Ambrosini & Bowman (2009)). These capabilities allow the firm to reconfigure and refresh its resources tock and adjust its operations to changing business environments in order to achieve competitive advantage.
Digital tools provide educators with a platform to deliver feedback in a multi-modal manner, which can be particularly useful for qualitative student work. This paper explores how delivering student feedback with a multimodal digital approach through screen casting is a way to enhance formative assessment for learning. The purpose of this work is to briefly survey the literature on feedback for learning and technology as a tool to enhance feedback, to share practice in using screen casting tools for delivering student feedback, and to discuss strategies and implications for faculty developers in promoting these methods of delivering personalized feedback using technology to the faculty they are supporting.
Comment construire le futur de votre marque? Pourquoi et comment les brand vision archetypes vous aident à accomplir cette mission est le sujet de ce livre. Vous y trouverez des guides pratiques, les pièges à éviter, comment conduire des workshops, les listes de contrôle ainsi qu’un jeu complet de brand vision archetypes que vous pourrez copier pour votre propre usage.
