This paper describes the architecture of an Interactive Learning Environment (ILE) on the internet using companions which one is a human and geographically distant of the learning site. The achieved system rests on a three-tier customer/server architecture (customer, web server, data and applications server) where human and software actors can communicate via the internet and uses the DTL learn...

The Actor Model can be used as a framework for modeling, understanding, and reasoning about, a wide range of concurrent systems. For example:  Electronic mail (e-mail) can be modeled as an Actor system. Mail accounts are modeled as Actors and email addresses as Actor addresses.  Web Services can be modeled with endpoints modeled as Actor addresses.  Objects with locks (e.g. as in Java and C#...

Leadership has been identified as one of the critical factors in the successful development of e-government projects especially so in developing countries. Unfortunately, empirical studies linking the outcome of egovernment projects and the role of leadership are very limited. Moreover, these studies did not comprehensively discuss the role of leadership in implementing e-government projects in...

Recent mainstream programming languages such as Erlang or Scala have renewed the interest on the Actor model of concurrency. However, the literature on the static analysis of actor systems is still lacking of mature formal methods. In this paper we present a minimal actor calculus that takes as primitive the basic constructs of Scala’s Actors API. More precisely, actors can send asynchronous me...

This paper proposes a new actor-critic-style algorithm called Dual Actor-Critic or Dual-AC. It is derived in a principled way from the Lagrangian dual form of the Bellman optimality equation, which can be viewed as a two-player game between the actor and a critic-like function, which is named as dual critic. Compared to its actor-critic relatives, Dual-AC has the desired property that the actor...

In Wireless Sensor & Actor Network (WSAN), sensors are used to sense data from environment and send this to the actor for taking appropriate action. In semi automated architecture data is forwarded to the actor and then to Sink. So the position of actor from sink is important also how many actors to be in active mode is considerable factor in minimizing energy consumption. There are many protoc...

In wireless sensor and actor network research, the commonly used mobility models for a mobile actor are random walk model, random waypoint mobility model, or variants thereof. For a fully connected network, the choice of mobility model for the actor is not critical because, there is at least one assured path from the sensor nodes to the actor node. But, for a sparsely connected network where in...

Actor Networks are a modeling framework for cyber-physical system protocols based on Latour’s actor-network theory that addresses the way we now create and exploit the power of computational networks. We advance a logic for modeling and reasoning about such actor networks, which is obtained through a two-stage constrained hybridization process. The first stage results in a logic that captures t...

ABSTRACT This paper is the history of how theory inertial inflation was developed in Brazil early 1980s, when very high, much higher than stagflation that happened United States previous decade. Perhaps this fact explains why formulated and not States. The main papers book defined new are duly referred. And author, 1980s 1990s a political actor, also tells application theory, failures successes.