To provide stable and responsive public SPARQL query services, data providers enforce quotas on server usage. Queries which exceed these are interrupted deliver partial results. Such interruption is not an issue if it possible to resume queries execution afterward. Unfortunately, there no preemption model for the Web that allows suspending resuming queries. In this paper, we propose SaGe: a engine based preemption. SaGe be suspended by after fixed time quantum resumed upon client request....

Reconciliating divergent data is an important issue in concurrent engineering, mobile computing and software configuration management. Currently, a lot of synchronizers or merge tools perform reconciliations. However, they do not define what the correctness their synchronisation. In this paper, we propose to use transformational approach as basic model for reasonning about We algorithm specific transformation functions that realize file system Unlike classic synchronizers, our synchronizer...

Awareness widgets facilitate coordination for both synchronous and asynchronous groupware systems. Unfortunately, they cannot be used multi-synchronous systems, where people work simultaneously but disconnected on the same project. With a group of architects, we have designed new awareness widget system called "State Treemap". This shows divergence states shared objects using Shneiderman's treemap visualization (1992). We developed integrated this in platform hosting virtual teams...

In the context of cooperative work a team alternates divergence phases where each member works in insulation on copies objects and convergence during which group reconciles validates data. To support this style working, we propose concept SAMS environment. A environment allows members to synchronous, asynchronous or multi-synchronous mode while ensuring coherence shared

Collecting statistics from online public SPARQL endpoints is hampered by their fair usage policies. These restrictions hinder several critical operations, such as aggregate query processing, portal development, and data summarization. Online sampling enables the collection of while respecting However, has not yet been integrated into standard. Although integrating standard appears beneficial, its effectiveness must be demonstrated in a practical semantic web context. This paper investigates...

This paper proposes a collective intelligence strategy for emerging semantic data. It presents combination of social web practices with technologies to enrich existing resources The introduces tagging approach called Semdrops. Semdrops defines conceptual model which is an extension the Gruber's tag where concept extended tag. implemented as Firefox add-on tool that turns browser into collaborative data editor. To validate Semdrops's approach, we conducted evaluation and usability studies...

Synchronisation of replicated shared data is a key issue in collaborative writing systems. Most existing synchronization tools are specific to particular type data, i.e. text files, calendars, XML files. Therefore, users must use different maintain their copies up-to-date. In this paper we propose generic framework based on the operational transformation approach that supports synchronisation files by using same tool. We present how our used support cooperative documents. An implementation...

DBpedia is the semantic mirror of Wikipedia. extracts information from Wikipedia and stores it in a knowledge base. This feature allows complex queries, which could infer new relations that are missing an interesting source to increase content. But, what best way add these following conventions? In this paper, we propose path indexing algorithm (PIA) takes resulting set DBPedia query discovers representative We evaluate with real data sets DBpedia.