Abstract
Deterministic Synchronous Multichannel Extension (DSME) is a prominent MAC behavior first introduced in IEEE 802.15.4e that supports deterministic guarantees using its multisuperframe structure. DSME also facilitates techniques like multi-channel and CAP reduction that help to increase the number of available guaranteed timeslots in a network. However, no tuning of these functionalities in dynamic scenarios is supported in the standard. In this paper, we present an effective multisuperframe tuning technique that also helps to utilize CAP reduction in an effective manner improving flexibility and scalability, while guaranteeing bounded delay.

Abstract

Abstract
The aim of this study was to test the effectiveness of invitation to cervical cancer screening through a very low-cost strategy based on automated and customized text messages, phone calls and reminders. A randomized (1:1) controlled trial was conducted among 13 Portuguese primary care units, recruiting women aged 25 to 49 years, eligible for cervical cancer screening, with an available mobile phone number. In the intervention group, participants were invited for cervical cancer screening through automated/customized text messages and phone calls, followed by text message reminders. Participants in the control group were invited through a written letter (standard of care). The primary outcome was the proportion of women adherent to screening up to 45 days after invitation and the secondary outcome was defined as the adherence proportion after invitation based only on text messages and reminders. A total of 1220 women were randomized, 605 to intervention and 615 to control group. The adherence to cervical cancer was significantly higher among women assigned to intervention (39.0% vs. 25.7%, p < 0.001); this corresponds to a difference of 13.3% (95% CI 8.1 to 18.5). The difference in adherence between an invitation strategy based only on text messages and reminders and the standard of care was - 0.4%, 95% CI -5.3 to 4.5. In conclusion, an invitation to cervical cancer screening using automated text messages/phone calls and reminders increases the adherence to cervical cancer screening. Such a low-cost and operator-independent strategy of invitation may contribute to the sustainability of organized screening programs. Trial registration number:NCT03122275.

Abstract
Current physical-layer security techniques typically rely on a degraded eavesdropper, thus warranting some sort of advantage that can be relied upon to achieve higher levels of security. We consider instead non-degraded eavesdroppers that possess equal or better capabilities than legitimate receivers. Under this challenging setup, most of the current physical-layer security techniques become hard to administer and new dimensions to establish advantageous periods of communication are needed. For that, we consider employing a spread spectrum uncoordinated frequency hopping (UFH) scheme aided by friendly jammers for improved secrecy. We characterize the secrecy level of this spread spectrum scheme, by devising a stochastic geometry mathematical model to assess the secure packet throughput (probability of secure communication) of devices operating under UFH that accommodates the impact of friendly jammers. We further implement and evaluate these techniques in a real-world test-bed of software-defined radios. Results show that although UFH with jamming leads to low secure packet throughput values, by exploiting frequency diversity, these methods may be used for establishing secret keys. We propose a method for secret-key establishment that builds on the advantage provided by UFH and jamming to establish secret keys, notably against non-degraded adversary eavesdroppers that may appear in advantageous situations. © 2005-2012 IEEE.

Abstract
Location-based games require, among other things, obtaining or computing information regarding the players’ physical activity and real-world context. Additionally, ensuring that the players are assigned challenges that are adequate and safe for the current context (both physical and spatial) is also important, as it can improve both the gaming experience and the outcomes of the exercise. However, the impact adaptivity has in the specific case of location-based exergames still has not been researched in depth. In this paper, we present a location-based exergame and compare different play-through sessions when playing both the context sensitive and the regular versions of the game. Results show that the adaptive version provided a significantly safer gameplay experience. These results showcase the impact in player health and safety that player adaptivity achieves in location-based exergames.

Abstract
In this paper an augmentative and alternative communication mobile application for people with language and speech impairments, called Diga Ola, is presented. With this mobile application, we aimed to assist people with speech and language impairment in their communication process, by presenting an alternative mobile solution in Portuguese language. The main results achieved on a preliminary user assessment were: first-rate performance, higher satisfaction and total autonomy in their interaction with the solution presented.