This paper proposes a practical approach to estimate the direct-toreverberant energy ratio (DRR) using a spherical microphone array without having knowledge of the source signal. We base our estimation on a theoretical relationship between the DRR and the coherence estimation function between coincident pressure and particle velocity. We discuss the proposed method’s ability to estimate the DRR...

Delay is an important Quality of Service (QoS) parameter. A significant part of an end-to-end delay of a data flow is latency – the delay induced by scheduling algorithms in network devices. In this paper we present a latency analysis of a Deficit Round-Robin (DRR) scheduler. We correct inaccuracies and deficiencies of the DRR latency analysis detected in works of other authors. We derive a new...

In the emerging high-speed packet-switched networks, packet scheduling algorithms used in the switches and routers will play a critical role in satisfying the Quality of Service (QoS) requirements of various applications. The latency bound of a scheduling discipline is an important QoS parameter, especially for real-time playback applications. Frame-based schedulers such as Deficit Round Robin ...

We address the measurement of reverberation in terms of the (DRR) in the context of the assessment of dereverberation algorithms for which we wish to quantify the level of reverberation before and after processing. The DRR is normally calculated from the impulse response of the reverberating system. However, several important dereverberation algorithms involve nonlinear and/or time-varying proc...

Infrastructure facilities need to be planned and constructed in such a way not only to change the vulnerable conditions of the infrastructure facility itself but also the society, the economy and the environment. Literature emphasises that integration of disaster risk reduction (DRR) to planning processes is a key to reduce natural disaster losses, boost socio-economic development needs and ens...

The dorsal root reflex (DRR) is a special manifestation of primary afferent interaction which can be used to further examine and extend our understanding of cutaneous fiber interactions derived from studies of the dorsal root potential (DRP) and intracellular recording of primary afferent depolarization (PAD). The presynaptic interactions of mammalian cutaneous afferents, for example, are thoug...

The Dan River Region (DRR) is located in southern Virginia, with the city of Danville in the geographical center. The DRR includes Pittsylvania County, Va., the northern half of Caswell County, N.C., a southeastern portion of Henry County, Va., and the western portion of Halifax County, Va. The area’s economy is predominantly agricultural, with some manufacturing and healthcare services also ad...

This paper presents an approach to analyzing the reduction intensity of handaxes with the aid of 3D scanning technology. Two quantitative reduction indices, the Scar Density Index (SDI) and the Flaked Area Index (FAI), are applied to handaxes from the third terrace of the Danjiangkou Reservoir Region (DRR), central China, dated to the Middle Pleistocene. The results show that most of the DRR ha...

We investigate the performance of TCP under three representatives of packet scheduling algorithms at the router. Our main focus is to investigate how fair service can be provided for elastic applications sharing the link. Packet scheduling algorithms that we consider are FIFO (First In First Out), RED (Random Early Detection), and DRR (Deficit Round Robin). Through simulation and analysis resul...

Purpose – Disasters provide physical, social, economic, political and environmental development windows of opportunity particularly through housing and infrastructure reconstruction. The reconstruction process should not be neglected due to the opportunistic nature of facilitating innovation in development. In this respect, postdisaster ‘infrastructure’ reconstruction plays a critical role in d...