A new global motion estimation technique for sprite coding is presented in this paper. The proposed system manages to accurately register frames to a sprite without referencing the sprite. This allows motion estimation process to be performed in an environment free from the adverse influence of the sprite which is usually blurred by the erroneous motion estimation. Furthermore, our proposed sys...

Despite its lower stability and higher nucleation barrier, a metastable charge-disordered colloidal phase manages to parasitically crystallize from nuclei of the stable charge-ordered due enhanced kinetic crystal growth.

The Grid Datafarm architecture is designed for global petascale data-intensive computing. It provides a global parallel filesystem with online petascale storage, scalable I/O bandwidth, and scalable parallel processing, and it can exploit local I/O in a grid of clusters with tens of thousands of nodes. One of features is that it manages file replicas in filesystem metadata for fault tolerance a...

We propose an efficiently updatable index scheme for XML documents. This index scheme consists of four types of indices. Content index manages occurrence positions of words, element names, attribute names and attribute values. Local structure index manages logical structure of each document. Global structure index summarizes logical structure of document instances for a DTD. The last one is cal...

A CAD environment requires a significantly different model of transaction from that developed for typical data-processing applications. A viable model of CAD transaction must allow a group of cooperating designers to arrive at a design without being forced to wait over a long duration. It must also allow a group of designers to collaborate on a design with another group by assigning subtasks. I...

The CSCW research domain still tries to find a better way for supporting the users needs. Some groupware systems propose global and integrated environments supporting collaborative activities, but empirical studies show that these environments usually omit to support some dimensions of the work. On the other hand, some groups work with diverse applications that do not know each other. Mainly in...

Ubiquitous services have gained increasing attentions in the area of mobile communication aiming to allow service access anywhere, anytime and anyhow while keeping complexity to a minimum for both users and service providers. Ubiquitous environment features a wide range and an increasing number of access devices and network technologies. Context-aware content/service adaptation is deemed necess...

In this contribution, a generic two-phase stochastic variable neighborhood approach is applied to nurse rostering problems. The proposed algorithm is used for creating feasible and efficient nurse rosters for many different nurse rostering cases. In order to demonstrate the efficiency and generic applicability of the proposed approach, experiments with real-world input data coming from many dif...

This paper describes the EVI3d framework, a distributed architecture developed to enhance interactions within Virtual Environments (VE). This framework manages many multi-sensorial devices such as trackers, data gloves, and speech or gesture recognition systems as well as haptic devices. The structure of this architecture allows a complete dispatching of device services and their clients on as ...

Jackal is a fine-grained distributed shared memory system that can run multithreaded Java programs on distributedmemory systems. The Jackal compiler generates an access check for every use of an object field or array element. The overhead of the access checks is reduced using compiler optimizations. The runtime system uses a homebased consistency protocol that manages (and caches) objects and a...