Rate Maximization of Decode-and-Forward Relaying Systems with RF Energy Harvesting

We consider a three-node decode-and-forward (DF) half-duplex relaying system, where the source first harvests RF energy from the relay, and then uses this energy to transmit information to the destination via the relay. We assume that the information transfer and wireless power transfer phases alternate over time in the same frequency band, and their time fraction (TF) may change or be fixed from one transmission epoch (fading state) to the next. For this system, we maximize the achievable average data rate. Thereby, we propose two schemes: (1) jointly optimal power and TF allocation, and (2) optimal power allocation with fixed TF. Due to the small amounts of harvested power at the source, the two schemes achieve similar information rates, but yield significant performance gains compared to a benchmark system with fixed power and fixed TF allocation.

A framework for experimental determination of localised vertical pedestrian forces on full-scale structures using wireless attitude and heading reference systems

A major weakness among loading models for pedestrians walking on flexible structures proposed in recent years is the various uncorroborated assumptions made in their development. This applies to spatio-temporal characteristics of pedestrian loading and the nature of multi-object interactions. To alleviate this problem, a framework for the determination of localised pedestrian forces on full-scale structures is presented using a wireless attitude and heading reference systems (AHRS). An AHRS comprises a triad of tri-axial accelerometers, gyroscopes and magnetometers managed by a dedicated data processing unit, allowing motion in three-dimensional space to be reconstructed. A pedestrian loading model based on a single point inertial measurement from an AHRS is derived and shown to perform well against benchmark data collected on an instrumented treadmill. Unlike other models, the current model does not take any predefined form nor does it require any extrapolations as to the timing and amplitude of pedestrian loading. In order to assess correctly the influence of the moving pedestrian on behaviour of a structure, an algorithm for tracking the point of application of pedestrian force is developed based on data from a single AHRS attached to a foot. A set of controlled walking tests with a single pedestrian is conducted on a real footbridge for validation purposes. A remarkably good match between the measured and simulated bridge response is found, indeed confirming applicability of the proposed framework.

Culturally Sensitive Care of the Baby and Family in the NICU: a review of the literature

This oral presentation summarised the literature on cultural differences in grieving and provision of end-of-life care in the nICU

The Council and the Court: Shared Objectives or Opposing Views on the Crime of Aggression

This paper argues that an important part of ensuring the jurisdictional basis of the crime of aggression is to secure a partnership between the UN Security Council and the ICC. Such a partnership should be conducive towards the reality of holding to account individuals that undertake an illegal use of force. This Paper puts forward guiding principles for a model that would benefit a constructive institutional relationship between the Council and the Court. It is through the application of these five guiding principles that the inclusion of the crime of aggression in the Rome Statute can translate into a constructive relationship between the International Criminal Court and the Security Council for the betterment of international peace and security as well as international justice. I maintain that it would be damaging to both the legitimacy and operational effectiveness of the Security Council and the ICC and detrimental to the overall institutional relationship if the final outcome proves unfavourable to international action against the crime of aggression and nothing more than dead letter law. Essentially the key to a viable cooperation regime between the Court and the Council will hinge on shared objectives regarding the crime of aggression rather than opposing views, namely combating impunity by holding individuals accountable for the illegal use of force.