In this paper, we study the problem of power allocation for streaming multiple variable-bit-rate (VBR) videos in the downlink of a cellular network. We consider a deterministic model for VBR video traffic and finite playout buffer at the mobile users. The objective is to derive the optimal downlink power allocation for the VBR video sessions, such that the video data can be delivered in a timel...

Bandwidth smoothing techniques are eeective at reducing the burstiness of a compressed, pre-recorded video stream by prefetching frames into the client playback buuer in advance of each burst. In contrast to stored video, live applications typically have limited knowledge of frame sizes and often require bounds on the delay between the source and the client(s). This paper addresses bandwidth sm...

Quantum key distribution (QKD) [1] has been the most studied quantum information technology primitive for the past twenty years. In a practical QKD protocol, Alice and Bob can extract an arbitrary amount of secret key using an untrusted physical channel (also called a quantum channel), provided a few minimum assumptions such as they have access to a public authenticated channel. Contrary to cla...

Transmission of voice over packet switched networks, such as the Internet (VoIP), has been gradually evolving due to the advantages it can provide to the different end-users (private user, integrated networks service providers, business arena, etc). However, in order for VoIP to be commonly used, the Quality of Service (QoS) offered by VoIP needs to be at least as high as the traditional Plain ...

A novel rate-control algorithm with a variable-encoding frame-rate method is proposed in this work for low-bit-rate video coding. Most existing rate-control algorithms for low-bit-rate video focus on bit allocation at the macroblock level under a constant frame-rate assumption. The proposed rate-control algorithm is able to adjust the encoding frame rate at the expense of tolerable time-delay. ...

Variable bit-rate compression (VBR) is known to be more efficient than constant bit-rate (CBR) compression. However, since most transmission media convey a constant bit rate, most applications use CBR compression. In multi-program applications, such as satellite and cable television, a technique called joint bit-rate control can be used. With joint bit-rate control the bit rates of individual p...

The rate of penetration (ROP) is one of the vital parameters which directly affects the drilling time and costs. There are various parameters that influence the drilling rate; they include weight on bit, rotational speed, mud weight, bit type, formation type, and bit hydraulic. Several approaches, including mathematical models and artificial intelligence have been proposed to predict the rate o...

Mobile ad hoc networks are facing new challenges including routing, quality of service and reliability. Quality of service can be achieved through the use of bit rate transmission. A modified variable bit rate on demand routing protocol for mobile adhoc network is presented in this paper. We designed, implemented and studied the performance of a Variable Bit-rate On demand Routing (VBOR) protoc...