A key issue for the real deployment of Digital Rights Management (DRM) systems is interoperability. A clear example is at the level of Rights Expression Languages (RELs), where two of them are a prominent role. On the one hand, ODRL (Open Digital Rights Language) is an initiative being used, for example, by the Open Mobile Alliance (OMA), a relevant industrial forum in the area of mobile and on...

Otitis media (OM) is the most common childhood disease. Almost all children experience at least one episode of otitis media with effusion (OME) or acute otitis (OMA) during childhood, and a substantial subgroup is confronted with recurrent episodes. If not treated adequately, OM may lead to temporary or permanent hearing loss. It is well known that bacteria and viruses cause OMA, and may play a...

The Open Mobile Alliance (OMA) is defining the Push-to-talk over Cellular (PoC) service where SIP is the protocol used to establish half-duplex media sessions across different participants, to send instant messages, etc. This document defines a SIP event package to support publication, subscription, and notification of additional capabilities required by the PoC service. This SIP event package ...

This paper proposes a client architecture for the Push to Talk over Cellular (PoC) service based on the Open Mobile Alliance (OMA) PoC specifications v1.0 release. We show that most standard VoIP modules can be reused for the PoC client, and the VoIP software can be easily extended to support PoC service. Then we present the detailed message flows between the PoC client and other network entiti...

Orthogonal time frequency space (OTFS) is being pursued in recent times as a suitable wireless transmission technology for use high mobility scenarios. In this work, we propose nonorthogonal multiple acess (NOMA) based OTFS which may be called NOMA-OTFS system and evaluate its performance from level link perspective. The challenge lies the fact that while known resilience to conditions, NOMA yi...

This article presents advances in resource allocation (RA) for downlink non-orthogonal multiple access (NOMA) systems, focusing on user pairing (UP) and power allocation (PA) algorithms. The former pairs the users to obtain the high capacity gain by exploiting the channel gain difference between the users, while the later allocates power to users in each cluster to balance system throughput and...

Recent studies of spinal cord axon regeneration have reported good long-term results using various types of tissue scaffolds. Olfactory tissue allows autologous transplantation and can easily be obtained by a simple biopsy that is performed through the external nares. We performed a clinical pilot study of olfactory mucosa autograft (OMA) for chronic complete spinal cord injury in eight patient...

In uplink block-fading multiple access channel (BFMAC), the advantage of multiuser diversity (MUD) can be taken to achieve higher system throughput. In this letter, with rate constraints for all users and only channel state information available at the receiver assumed, we demonstrate that nonorthogonal multiple access (NOMA) outperforms the counterpart of orthogonal multiple access (OMA) via e...

In this paper, non-orthogonal multiple access (NOMA) in amplify-and-forward relay systems with partial relay selection (PRS) is investigated. More specifically, new exact closed-form expressions for the outage probabilities at two users are derived, based on which an asymptotic analysis at high signalto-noise ratio (SNR) is carried out. Additionally, in order to investigate the performance gap ...