Publications de Ali Salehi | EPFL Graph Search

Design and implementation of an efficient data stream processing system

In standard database scenarios, an end-user assumes that all data (e.g., sensor readings) is stored in a database. Therefore, one can simply submit any arbitrary complex processing in the form of SQL queries or stored procedures to a database server. Data ...

EPFL2010

Knowing When to Slide: Efficient Scheduling for Sliding Window Processing

Karl Aberer, Ali Salehi, Sebastian Michel, Mehdi Riahi

We consider sliding window query execution scheduling in stream processing engines. Sliding windows are an essential building block to limit the query focus at a particular part of the stream, based either on value count or time ranges. These so called sli ...

IEEE Computer Society2009

Scalable Delivery of Stream Query Result

Karl Aberer, Ali Salehi

Continuous queries over data streams typically produce large volumes of result streams. To scale up the system, one should carefully study the problem of delivering the result streams to the end users, which, unfortunately, is often over-looked in existing ...

VLDB2009

Environmental Monitoring 2.0

Karl Aberer, Guillermo Barrenetxea Kobas, Marc Parlange, Ali Salehi, Sebastian Michel, Mathias Thierry Pierre Bavay

A sensor network data gathering and visualization infrastructure is demonstrated, comprising of Global Sensor Networks (GSN) middleware and Microsoft SensorMap. Users are invited to actively participate in the process of monitoring real-world deployments a ...

ICDE2009

Rethinking the Design of Distributed Stream Processing Systems

Karl Aberer, Ali Salehi

In this paper, we present a novel architecture to support large scale stream processing services in a widely distributed environment. The proposed system, COSMOS, distinguishes itself by its loose coupling and communication efficiency. To exploit the shari ...

IEEE Computer Society2008

Infrastructure for data processing in large-scale interconnected sensor networks

Karl Aberer, Manfred Hauswirth, Ali Salehi

With the price of wireless sensor technologies diminishing rapidly we can expect large numbers of autonomous sensor networks being deployed in the near future. These sensor networks will typically not remain isolated but the need of interconnecting them on ...

IEEE Computer Society2007

Zero-programming Sensor Network Deployment

Karl Aberer, Manfred Hauswirth, Ali Salehi

IEEE Computer Society2007

Middleware support for the "Internet of Things"

Karl Aberer, Manfred Hauswirth, Ali Salehi

The ``Internet of Things'' intends to enhance items of our everyday life with information and/or processing and interconnect them, so that computers can sense, integrate, present, and react on all kinds of aspects of the physical world. As this implies tha ...

5th GI/ITG KuVS Fachgespräch "Drahtlose Sensornetze"2006

A middleware for fast and flexible sensor network deployment

Karl Aberer, Manfred Hauswirth, Ali Salehi

Proceedings of the International Conference on Very Large Data Bases (VLDB 2006)2006