Personne
Guillermo Barrenetxea Kobas
Cette personne n’est plus à l’EPFL
Publications associées (32)
The Beauty of the Commons: Optimal Load Sharing by Base Station Hopping in Wireless Sensor Networks
Martin Vetterli, Patrick Thiran, Guillermo Barrenetxea Kobas, François Ingelrest, Runwei Zhang
In wireless sensor networks (WSNs), the base station (BS) is a critical sensor node whose failure causes severe data losses. Deploying multiple fixed BSs improves the robustness, yet requires all BSs to be installed with large batteries and large energy-ha ...
2015Improving the degree-day method for sub-daily melt simulations with physically-based diurnal variations
Andrea Rinaldo, Cara Christine Tobin, Marc Parlange, Bettina Schaefli, Guillermo Barrenetxea Kobas, Ludovico Nicotina, Silvia Simoni
This paper proposes a new extension of the classical degree-day snowmelt model applicable to hourly simulations for regions with limited data and adaptable to a broad range of spatially-explicit hydrological models. The snowmelt schemes have been tested wi ...
Elsevier2013Share Risk and Energy: Sampling and Communication Strategies for Multi-Camera Wireless Monitoring Networks
Martin Vetterli, Guillermo Barrenetxea Kobas, Zichong Chen
In the context of environmental monitoring, outdoor wireless cameras are vulnerable to natural hazards. To benefit from the inexpensive imaging sensors, we introduce a multi-camera monitoring system to share the physical risk. With multiple cameras focusin ...
Ieee2012Spatial variability of near surface soil moisture in an alpine catchment: application of a wireless network of meteorological stations
Marc Parlange, Steven Vincent Weijs, Guillermo Barrenetxea Kobas, Raphaël Mutzner
Soil moisture is an essential control on hydrological and meteorological behavior and knowledge of its spatial variability is considered to be of high importance for the performance of distributed hydrological models. Few studies have tried to assess the s ...
2012Sensorcam: An Energy-Efficient Smart Wireless Camera for Environmental Monitoring
Martin Vetterli, Paolo Prandoni, Guillermo Barrenetxea Kobas, Zichong Chen
Reducing energy cost is crucial for energy-constrained smart wireless cameras. Existing platforms impose two main challenges: First, most commercial smart phones have a closed platform, which makes it impossible to manage low-level circuits. Since the samp ...
Assoc Computing Machinery2012Application of a meteorological wireless sensor network to a small alpine watershed
Martin Vetterli, Marc Parlange, Steven Vincent Weijs, Guillermo Barrenetxea Kobas, Raphaël Mutzner, Silvia Simoni
This study focuses on the spatial variability of meteorological parameters in an alpine watersehd in the Swiss Alps, where a wireless sensor network has been deployed. We present some results from the previous summer campaigns, sharing experiences and chal ...
2012Distributed Successive Refinement of Multiview Images Using Broadcast Advantage
Martin Vetterli, Guillermo Barrenetxea Kobas, Zichong Chen
In environmental monitoring applications, having multiple cameras focus on common scenery increases robustness of the system. To save energy based on user demand, successive refinement image coding is important, as it allows us to progressively request bet ...
Institute of Electrical and Electronics Engineers2012How is the Weather: Automatic Inference from Images
Martin Vetterli, Guillermo Barrenetxea Kobas, Albrecht Johannes Lindner, Feng Yang, Zichong Chen
Low-cost monitoring cameras/webcams provide unique visual information. To take advantage of the vast image dataset captured by a typical webcam, we consider the problem of retrieving weather information from a database of still images. The task is to autom ...
2012Event-Driven Video Coding for Outdoor Wireless Monitoring Cameras
Martin Vetterli, Guillermo Barrenetxea Kobas, Zichong Chen
Reducing communication cost is crucial for outdoor wireless monitoring cameras which are constrained by limited energy budgets. From event detection point of view, traditional video coding schemes such as H.264 are inefficient as they ignore the "meaning" ...
2012Hydrologic response of an alpine watershed: Application of a meteorological wireless sensor network to understand streamflow generation
Martin Vetterli, Marc Parlange, Guillermo Barrenetxea Kobas, Daniel Nadeau, Marc Diebold, François Ingelrest, Simone Padoan, Silvia Simoni
A field measurement campaign was conducted from June to October 2009 in a 20 km2 catchment of the Swiss Alps with a wireless network of 12 weather stations and river discharge monitoring. The objective was to investigate the spatial variability of meteorol ...
American Geophysical Union2011