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Karl Aberer

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Related publications (297)

Page 7 of 15

Infrastructure for data processing in large-scale interconnected sensor networks

Karl Aberer, Manfred Hauswirth

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

LSH At Large - Distributed KNN Search in High Dimensions

Karl Aberer, Philippe Cudré-Mauroux, Sebastian Michel, Parisa Haghani

We consider K-Nearest Neighbor search for high dimensional data in large-scale structured Peer-to-Peer networks. We present an efficient mapping scheme based on p-stable Locality Sensitive Hashing to assign hash buckets to peers in a Chord-style overlay ne ...

2008

A FFINITY: Efficiently Querying Statistical Measures on Time-Series Data

Karl Aberer, Saket Sathe

Computing statistical measures for large databases of time series is a fundamental primitive for querying and mining time-series data [1]–[6]. This primitive is gaining importance with the increasing number and rapid growth of time series databases. In thi ...

IEEE2013

Model-View Sensor Data Management in the Cloud

Karl Aberer, Tian Guo

Infinite nature of sensor data poses a serious challenge for query processing even in a cloud infrastructure. Model-based sensor data approximation reduces the amount of data for query processing, but all modeled segments need to be scanned, in the worst c ...

2013

From Bioinformatic Web Portals to Semantically Integrated Data Grid Networks

Karl Aberer, Philippe Cudré-Mauroux, Adriana Budura

We propose a semi-automated method for redeploying bioinformatic databases indexed in a Web portal as a decentralized, semantically integrated and service-oriented Data Grid. We generate peer-to-peer schema mappings leveraging on cross-referenced instances ...

2007

A model-based back-end for air quality data management

Karl Aberer, Julien Eberle

In this paper we present a hybrid model for real-time query processing over data stream collected by mobile air quality sensors. First, we introduce a novel indexing scheme for representing air quality and use it for generating and evaluating a static mode ...

ACM Press2013

Towards Online Multi-Model Approximation of Time Series

Karl Aberer, Mehdi Riahi

The increasing use of sensor technology for various monitoring applications (e.g. air-pollution, traffic, climate-change, etc.) has led to an unprecedented volume of streaming data that has to be efficiently stored and retrieved. Real-time model-based data ...

IEEE Computer Society2011

EnviroMeter: A Platform for Querying Community-Sensed Data

Karl Aberer, Dipanjan Chakraborty, Saket Sathe

Efficiently querying data collected from Large-area Communitydriven Sensor Networks (LCSNs) is a new and challenging problem. In our previous works, we proposed adaptive techniques for learning models (e.g., statistical, non-parametric, etc.) from such dat ...

2013

An Evaluation of Model-Based Approaches to Sensor Data Compression

Karl Aberer, Quoc Viet Hung Nguyen, Ho Young Jeung

As the volumes of sensor data being accumulated are likely to soar, data compression has become essential in a wide range of sensor-data applications. This has led to a plethora of data compression techniques for sensor data, in particular model-based appr ...

Institute of Electrical and Electronics Engineers2013

An MAS Negotiation Support Tool for Schema Matching

Hoai Xuan Luong, Karl Aberer, Quoc Viet Hung Nguyen, Zoltán Miklós

Database schema matching is the process of establishing correspondences between attributes of schemas for data integration purpose. Though various commercial tools have been developed, their results are inherently uncertain. In practice, to obtain correct ...

2013

BATC - A Benchmark for Aggregation Techniques in Crowdsourcing

Karl Aberer, Quoc Viet Hung Nguyen, Thành Tâm Nguyên, Son Thanh Do

As the volumes of AI problems involving human knowledge are likely to soar, crowdsourcing has become essential in a wide range of world-wide-web applications. One of the biggest challenges of crowdsourcing is aggregating the answers collected from crowd wo ...

ACM2013

Data Summarization with Social Contexts

Karl Aberer, Tian Guo, Hao Zhuang, Rameez Rahman

While social data is being widely used in various applications such as sentiment analysis and trend prediction, its sheer size also presents great challenges for storing, sharing and processing such data. These challenges can be addressed by data summariza ...

Assoc Computing Machinery2016

Message Passing in Semantic Peer-to-Peer Overlay Networks

Karl Aberer, Philippe Cudré-Mauroux

Peer-to-Peer (P2P) systems rely on machine-to-machine ad-hoc communications to offer services to a community. Contrary to the classical client-server architecture, P2P systems consider all peers, i.e., all nodes participating in the network, as being equal ...

2007

Personalized information access in a wiki using structured tagging

Karl Aberer

Environmental engineers from different organizations work in interdisciplinary projects having the need of information exchange. In particular, a collaborative environment with personalized access to information is needed, which supports strongly varying i ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2007

Castor: Scalable Secure Routing for Ad Hoc Networks

Karl Aberer, Panagiotis Papadimitratos, Zoran Despotovic, Wojciech Galuba, Marcin Poturalski

Wireless ad hoc networks are inherently vulnerable, as any node can disrupt the communication of potentially any other node in the network. Many solutions to this problem have been proposed. In this paper, we take a fresh and comprehensive approach that ad ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Advanced Peer-to-Peer Networking: The P-Grid System and its Applications

Karl Aberer, Manfred Hauswirth, Philippe Cudré-Mauroux, Anwitaman Datta, Zoran Despotovic, Jie Wu

The limitations of client/server systems become evident in an Internet-scale distributed environment. Peer-topeer (P2P) systems offer an interesting alternative to traditional client/server systems: Every node acts both as a client and a server and “ ...

2003

From Web 1.0 to Web 2.0 and back - How did your Grandma use to tag?

Karl Aberer, Sebastian Michel, Gleb Skobeltsyn, Adriana Budura

We consider the applicability of terms extracted from anchortext as a source of Web page descriptions in the form of tags. With a relatively simple and easy-to-use method, we show that anchortext significantly overlaps with tags obtained from the popular t ...

2008

The challenges of merging two similar structured overlays: A tale of two networks

Karl Aberer, Anwitaman Datta

Structured overlay networks is an important and interesting primitive that can be used by diverse peer-to-peer applications. Multiple overlays can result either because of network partitioning or (more likely) because different groups of peers build such o ...

Springer2006

Middleware support for the "Internet of Things"

Karl Aberer, Manfred Hauswirth

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

Electricity Load Forecasting for Residential Customers: Exploiting Aggregation and Correlation between Households

Samuel François Roger Joseph Humeau, Karl Aberer, Matteo Vasirani, Tri Kurniawan Wijaya

The recent development of smart meters has allowed the analysis of household electricity consumption in real time. Predicting electricity consumption at such very low scales should help to increase the efficiency of distribution networks and energy pricing ...

IEEE2013