No description available.

No description available.

No description available.

No description available.

No description available.

We consider the problem of sequential decision making in non-stationary environments. In order to avoid solutions that are too conservative, we capture the degree of non-stationarity in real-world problems through different mathematical models for the environment. In the first model, we add to the environment a state that follows Markovian dynamics subject to limited levels of non-stationary uncertainty. In the second model, we add non-stationary constraints to the environment. In the third model, we limit the frequency of non-stationary changes. In each of these models, we provide efficient learning algorithms and prove corresponding performance guarantees that depend critically on the degree of non-stationarity. / Nous étudions le problème de décisions séquentielles dans des environnements non-stationnaires. Pour éviter des solutions trop conservatrices, nous modélisons le degré de non-stationnarité à travers differents modèles mathématiques de l'environnement. Dans le premier modèle, nous ajoutons à l'environnement un état qui suit une dynamique Markovienne, sujet à des niveaux limités d'incertitude non-stationnaire. Dans le second modèle, nous ajoutons des contraintes non-stationnaires à l'environnement. Dans le troisième modèle, nous limitons la fréquence des changements non-stationnaires. Pour chaque modèle, nous présentons des algorithmes d'apprentissage efficients et prouvons des guaranties de performance qui dépendent du degré de non-stationnarité.

<p> The design of NextGen and current-day cockpit displays are critical for efficient pilot performance and situation awareness on the flight deck. Before deployment of a design into the cockpit the costs and benefits that a display design imposes on performance and situation awareness should be considered. In this thesis, a design tool was developed to support the design of NextGen displays for situation awareness and performance. This design tool is a library of pilot performance estimates. Through literature reviews and meta-analyses of empirical data, the library was developed to provide display designers 1) qualitative distinctions of display properties that either support or limit full situation awareness, and 2) quantitative performance time estimates until situation awareness as a function of various display formats. A systematic method was also developed for future augmentation of the library. </p>

No description available.

No description available.

Mathematical and stochastic computer models were built to simulate concurrent engineering processes (CE) in order to study how different process mechanisms contribute to new product development (NPD) performance. Micro-models of various phenomena which occur in concurrent engineering processes, such as functional participation, overlapping, decision-making, rework, and learning, were included, and their effects on the overall NPD process were related to process span time and effort. The study focused on determining under what conditions CE processes are more favorable than sequential processes, in terms of expected payoff, span time, and effort, as dependent variables of functional participation and overlapping, and the corresponding trade-offs between more upfront effort versus span time reduction.