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Wearable devices have recently gained a foothold in the market with the uptake of smartwatches. The strong tie between a smartwatch and its owner, the highly predictable position of a smartwatch on the body, and its internal sensors are enabling a wide array of applications that leverage the user context. In this paper we focus on a gesture recognition system to augment the user interaction with multimedia...
We introduce a novel, efficient methodology for the automatic recognition of major vertical displacements in human activities. It is based exclusively on barometric pressure measured by sensors commonly available on smartphones and tablets. We evaluate various algorithms to distinguish dynamic activities, identifying four different categories: standing/walking on the same floor, climbing stairs, riding...
Computational offloading is a traditional approach to augment the capabilities of smart devices. It has been shown that offloading is most efficient when carried out within a Local Area Network. Several frameworks have been proposed to tackle this problem but fail to consider that some of the application code may be part of the offloading request. This is a key element in cloudlets where it is virtually...
Computational offloading is the standard approach to running computationally intensive tasks on resource-limited smart devices, while reducing the local footprint, i.e., the local resource consumption. The natural candidate for computational offloading is the cloud, but recent results point out the hidden costs of cloud reliance in terms of latency and energy. Strategies that rely on local computing...
This paper presents a novel authentication strategy for Bluetooth-equipped smartwatches. We use the built-in smartwatch sensors to detect whether two users have shaken hands. If this is the case each devices give to the other a soft authentication privilege, which is suitable for applications with relaxed security needs (for instance, an application to exchange business cards). We evaluate the system...
This paper presents the design and implementation of a Portable Open Source Energy Monitor (POEM) to enable developers to automatically test and measure the energy consumption of every single application component down to the control flow level. Based on existing portable power meter designs, POEM extends the state of the art of application analysxis with the energy annotation of the control flow...
Mocking is a standard technique in software testing; its main goal is to mimic the real object behavior in a controllable way. Recently, mocking techniques have been used in mobile environments to increase the user privacy and their goal is to allow users to select the kind of information they want to pass to the application (if real or randomly generated). This work presents MockingBird, a novel...
Although mobile smart devices are becoming more and more resourceful, they cannot compete with higher-end devices in terms of computational capabilities. Therefore, it is generally advantageous to offload computationally intensive tasks. While cloud-based offloading is popular, it has a non-negligible impact on the energy consumption of mobile devices. Our solution is a novel approach based on locally...
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