Search results for "RICE"
showing 10 items of 2331 documents
Martingale Convergence Theorems and Their Applications
2020
We became familiar with martingales X=(X n ) n∈N0 as fair games and found that under certain transformations (optional stopping, discrete stochastic integral) martingales turn into martingales. In this chapter, we will see that under weak conditions (non-negativity or uniform integrability) martingales converge almost surely. Furthermore, the martingale structure implies L p -convergence under assumptions that are (formally) weaker than those of Chapter 7. The basic ideas of this chapter are Doob’s inequality (Theorem 11.4) and the upcrossing inequality (Lemma 11.3).
Cronistoria del dottorato
2011
Il dottorato in Progettazione Architettonica è uno dei primi dottorati di ricerca attivati presso l’Ateneo palermitano e, nel corso della sua lunga attività, si è ritagliato un consolidato ruolo, riconosciuto a livello nazionale e internazionale, occupando, per la sua specificità, un compito formativo centrale nell'ambito degli studi di architettura. Qui s’intende ripercorrere (schematicamente e nelle sue tappe essenziali), aggiornandola agli ultimi anni della sua attività, la vicenda scientifica che il dottorato ha vissuto con alterne vicissitudini, sottolineandone i passaggi intervenuti in rapporto alla composizione del Collegio dei Docenti e alla mutazione sviluppatasi nei principali ori…
Effect of human granulocyte colony stimulating factor (G-CSF) and reduced glutathione (GSH) on drug-induced leukopenia in golden Syrian hamsters.
1990
Experimental duopolies under price guarantees
2011
In a symmetric differentiated experimental duopoly we test the ability of Price Guarantees (PGs) to raise prices above the competitive levels. Different types of PGs ("aggressive" and "soft" price-beating and price-matching) are implemented either as an exogenously imposed market rule or as a business strategy. Our results show that PGs may lead close to the collusive outcome, depending on whether the interaction between duopolists is repeated and provided that the guarantee is not of the "aggressive" price-beating type.
Quantized Dissensus in Networks of Agents subject to Death and Duplication
2012
Dissensus is a modeling framework for networks of dynamic agents in competition for scarce resources. Originally inspired by biological cells behaviors, it fits also marketing, finance and many other application areas. Competition is often unstable in the sense that strong agents, those having access to large resources, gain more and more resources at the expense of weak agents. Thus, strong agents duplicate when reaching a critical amount of resources, whereas weak agents die when loosing all their resources. To capture all these phenomena we introduce systems with a discrete time gossip and unstable state dynamics interrupted by discrete events affecting the network topology. Invariancy o…
In-Depth Analysis of Pricing Problem Relaxations for the Capacitated Arc-Routing Problem
2015
Recently, Bode and Irnich [Bode C, Irnich S (2012) Cut-first branch-and-price-second for the capacitated arc-routing problem. Oper. Res. 60(5):1167–1182] presented a cut-first branch-and-price-second algorithm for solving the capacitated arc-routing problem (CARP). The fundamental difference to other approaches for exactly solving the CARP is that the entire algorithm works directly on the typically sparse underlying graph representing the street network. This enables the use of highly efficient dynamic programming-based pricing algorithms to solve the column-generation subproblem also known as the pricing problem. The contribution of this paper is the in-depth analysis of the CARP pricing…
Effective Handling of Dynamic Time Windows and Its Application to Solving the Dial-a-Ride Problem
2015
A dynamic time window relates to two operations that must be executed within a given time meaning that the difference between the points in time when the two operations are performed is bounded from above. The most prevalent context of dynamic time windows is when precedence is given for the two operations so that it is a priori specified that one operation must take place before the other. A prominent vehicle routing problem with dynamic time windows and precedence is the dial-a-ride problem (DARP), where user-specified transportation requests from origin to destination points must be serviced. The paper presents a new branch-and-cut-and-price solution approach for the DARP, the prototypi…
Motor decision and modular control of an hyper-redundant system
2015
This thesis is aimed at better understanding how the Central Nervous System (CNS) plans and controls voluntary movements. When moving, humans must overcome intrinsic (e.g. choosing which muscles to activate) and extrinsic (e.g. choosing where to reach an object) redundancy, requiring selecting one motor solution among several potential ones. To better understand this process, we studied in parallel two important motor control theories: muscular synergies and motor decision. In a first part, we focused on intrinsic redundancy by testing the muscular synergies hypothesis. According to it, the CNS simplifies the control of muscles, in using a limited set of building blocks whose linear combina…
Enseignement et démocratisation : comparaison des effets sociaux des politiques de deux systèmes éducatifs, Ile Maurice, Ile de la Réunion
1999
International audience; Mauritious and Réunion are characterised by their contrasting education policies. Our research questions, form a comparative angle, not just the impact of these political choice but also the consequences of the way the two systems are run in terms of school democratisation. In order to do this, we make a point of putting in perspective the differentiated paths in school followed by pupils from a sample of schools in Mauritius and Réunion. The complementarity between quantitative and qualitative approaches makes it possible to show that the expected social effects are modulated by the behaviour strategies of the "initiated" actors. If the movement towards education fo…
Condizioni per l’incidenza della ricerca didattica nel miglioramento della scuola
2018
Il dibattito in corso sull’ Evidence Based Education (EBE) dimostra come la questione della cumulabilità delle conoscenze didattiche sia particolarmente sentita da coloro che si occupano di ricerca empirica in campo scolastico. E’ avvertita l’esigenza di fare il punto su quanto nella comunità scientifica si sa, con un’accettabile certezza, su un determinato tema, senza dover ogni volta ripartire da zero. Il problema è formulabile in questi termini: fino a che punto e a quali condizioni è possibile cumulare i risultati delle ricerche empiriche in campo didattico, per ricavare da essi utili indicazioni per le azioni degli insegnanti, che auspicabilmente dovrebbero essere coinvolti dai ricerca…