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Université de Neuchâtel

Freemote Emulator : A Lightweight and Visual Java Emulator for WSN

Maret, Timothée ; Kummer Raphaël ; Kropf, Peter ; Wagen, Jean-Frédéric

In: Lecture notes in computer science (LNCS), 2008, vol. 5031, p. 92-103

Research on Wireless Sensor Networks (WSNs) has developed highly optimized software environments fitting the limited hardware resource constraints of Motes. Unfortunately, these environments suffer from relatively complex programming models. Nowadays well known languages such as Java and optimized JVMs become available and simplify the application development for the Motes. Thus, we developed the...

Université de Neuchâtel

Towards a Guided Cooperative Search

Le Bouthillier, Alexandre ; Crainic, Teodor Gabriel ; Kropf, Peter

In: 6th Metaheuristics International Conference (MIC2005), 2005, vol. 1227, p. 1-9

We present a framework for a guided parallel cooperative search that combines common meta-heuristics to solve combinatorial problem with more robustness and efficiency. Based on the central memory concept, the proposed identification pattern mechanism sends information to individual meta-heuristics about promising and unpromising patterns of the solution space. By fixing or prohibiting specific...

Université de Neuchâtel

On the Feasibility of DHT Lookup in Ad-Hoc Networks

Kummer Raphaël ; Kropf, Peter ; Felber, Pascal

Various peer-to-peer (PIP) architectures for ad-hoc networks have been proposed over the last few years. Most of them are unstructured and use some form of flooding to locate content, because the physical constraints of the underlying network make the construction of arbitrary application-layer overlays impractical. In this paper, we study the problem of applying distributed hash tables (DHT) for...

Université de Neuchâtel

Resource Management in Socio-Technical Systems: A Multi-Agent Coordination Framework

Kropf, Peter ; Chaib-draaa, Brahim

In: International Workshop on Harbour, Maritime & Multimodal Logistics Modelling and Simulation (HMS), 2000, p. 65-70

Resource management in complex socio-technical systems is a central and crucial task. The many diverse components involved together with various constraints such as real-time conditions make it impossible to devise exact optimal solutions. In this article, we present an approach to the resource management problem based on the multiagent paradigm to be applied in the context of a shipboard command...

Université de Neuchâtel

Réduction des besoins en communication des systèmes objets distribués utilisant CORBA

Kropf, Peter ; Babin, Gilbert ; Hulot, Alexandre

In: Colloque International sur les Nouvelles Technologies de la Répartition (NOTERE'98), 1999, p. 73-84

CORBA a été conçu en supposant que le réseau peut toujours suffire à la demande en communication. Ce n'est cependant pas toujours le cas. En particulier, on notera le cas des Systèmes de Commandement et Contrôle (SCC) utilisant CORBA pour la communication entre sous-systèmes distribués. Les SCC doivent garantir la transmission des données, même dans les situations extrêmes où les...

Université de Neuchâtel

Overview of the WOS project

Kropf, Peter

In: 45th International Scientific Colloquium, 1999, p. 1-15

We discuss the Web Operating System (WOS™) approach to global computing. We show that the heterogeneous and dynamic nature of the Web or Internet makes it impossible to define a fixed set of operating system services, usable for all services. Rather, we propose that generalized software configuration techniques, based on a demand-driven technique called eduction, can be used to define versions...

Université de Neuchâtel

A Method to Optimize Ship Maneuvers for the Coordination of Hardkill and Softkill Weapons within a Frigate

Blodgett, Dale E. ; Chaib-draaa, Brahim ; Plamondon, Pierrick ; Kropf, Peter ; Bossé, Eloï

In: 7th International Command and Control Research Technology Symposium, 2002, p. 1-15

The coordination of anti-air warfare hardkill and softkill weapon systems is an important aspect of command and control for a Frigate. Since the effectiveness of a particular weapon varies depending on the orientation of the Frigate with respect to the threats faced, a key element of the coordination process is to maneuver the Frigate to most effectively use all the weapons available. This paper...

Université de Neuchâtel

Adaptive Load Balancing for DHT Lookups

Bianchi, Silvia ; Serbu, Sabina ; Felber, Pascal ; Kropf, Peter

In: 15th International Conference on Computer Communications and Networks (ICCCN'06), 2006, p. 411-418

In the past few years, several DHT-based abstractions for peer-to-peer systems have been proposed. The main characteristic is to associate nodes (peers) with objects (keys) and to construct distributed routing structures to support efficient location. These approaches partially consider the load problem by balancing storage of objects without, however, considering lookup traffic. In this paper we...

Université de Neuchâtel

Problems of Computing on the Web

Ben Lamine, Slim ; Kropf, Peter ; Plaice, John

In: High Performance Computing Symposium 97, 1997, p. 296–301

We discuss the concept of computing on the Web. We show that the heterogeneous and dynamic nature of the Web makes it impossible to define a fixed set of operating system functions, usable for all services. Rather, we propose that generalized software configuration techniques, based on a demand-driven technique called eduction, can be used to define versions of a Web Operating System (WOS) that...