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Ali Salehi

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Publications associées (11)

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Design and implementation of an efficient data stream processing system

Ali Salehi

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

Environmental Monitoring 2.0

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

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

GSN, Middleware for Streaming World (Best Demo Award)

Karl Aberer, Sebastian Michel, Ali Salehi, Mehdi Riahi

In this paper we present the Global Sensor Networks (gsn.sf.net) and the NexTick (nextick.org) projects. ...

2009

Knowing When to Slide :: Efficient Scheduling for Sliding Window Processing

Karl Aberer, Sebastian Michel, Ali Salehi, 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

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

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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

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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

Global Sensor Networks

Karl Aberer, Manfred Hauswirth, Ali Salehi

The availability of cheap and smart wireless sensing devices provides unprecedented possibilities to monitor the physical world. On the technical side these devices introduce several original research problems, many of them related to the integration of th ...

2006

A middleware for fast and flexible sensor network deployment

Karl Aberer, Manfred Hauswirth, Ali Salehi

A key problem in current sensor network technology is the heterogeneity of the available software and hardware platforms which makes deployment and application development a tedious and time consuming task. To minimize the unnecessary and repetitive implem ...

2006