Polysaccharide - Based silver nanop articles systems

Measuring and modeling drillstring vibrations with top drive and near-bit sensors

In drill-bit generated seismic, understanding propagation of drillstring vibrations is a key factor for successful processing and interpretation. These vibrations are measured by the pilot sensors located at the top drive or down hole. Different sensor positions in the drillstring give rise to distinct drillstring-related arrivals. Using a unique dataset that contains recordings of both top drive and downhole sensors, we conduct a modelling-based analysis of the vibrations recorded in the fir...

MONITORING CO2 INJECTION INTO BASALTIC RESERVOIR FORMATIONS AT THE HELLISHEIÐI GEOTHERMAL SITE IN ICELAND: LABORATORY EXPERIMENTS

In the ACT Consortium funded project SUCCEED, researchers study the potential for monitoring the process of (re-)injecting produced and captured CO2 into the Hellisheiði geothermal field for the aid of enhancing geothermal deployment as well as permanently storing CO2 through mineralization. The Hellisheiði site provides an excellent opportunity for demonstrating an innovative seismic monitoring technique. Prior to conducting an active-source monitoring survey, we perform acoustic transmissio...

Energy-efficient Internet of Things monitoring with low-capacity devices

The Internet of Things (IoT) allows users to gather data from the physical environment. While sensors in public spaces are already widely used, users are reluctant to deploy sensors for shared data at their homes. The deployment of IoT nodes at the users premises presents privacy issues regarding who can access to their data once it is sent to the Cloud which the users cannot control. In this paper we present an energy-efficient and low cost solution for environmental monitoring at the users ...