With the increase of cellular users the traffic hot spots and unbalanced call distributions are common in wireless networks. As a solution to this problem, the CDMA techniques enable a base tranciever station to connect microcells with optical fibers and to control the channels by sectorizing the microcells. To solve the load balancing among microcells we dynamically sectorize the microcells de...

The empowerment formalism offers a goal-independent utility function fully derived from an agent’s embodiment. It produces intrinsic motivations which can be used to generate self-organizing behaviours in agents. One obstacle to the application of empowerment in more demanding (esp. continuous) domains is that previous ways of calculating empowerment have been very time consuming and only provi...

In this paper, an enhanced soft handoff algorithm is proposed to improve system capacity for multi-rate DS-CDMA cellular systems. In the algorithm, we first propose a load-based power allocation scheme for serving soft handoff users in the forward link; we next develop two kinds of active set determination mechanism: a quality-based active set control (QBASC) scheme and fuzzy active set control...

We consider the query allocation problem in open and large distributed information systems. Provider sources are heterogeneous, autonomous, and have finite capacity to perform queries. A main objective in query allocation is to obtain good response time. Most of the work towards this objective has dealt with finding the most efficient providers. But little attention has been paid to satisfy the...

This paper investigates the channel assignment problem of dual-band PCS systems where single-band and dual-band handsets co-exist. Load-balancing channel assignment schemes are proposed to improve the system performance. To balance the loads of both bands, the BSC selects a band to serve a call request of a dual-band handset based on the loads of both bands. In addition, a channel re-assignment...

The software and hardware systems required to deliver modern Web based services are becoming increasingly complex. Management and evolution of the systems requires periodic analysis of performance and capacity to maintain quality of service and maximise efficient use of resources. In this work we present a method that uses a repeated local search technique to improve the accuracy of modelling s...

A CFD software was employed to analyze the characteristics of the flat round porous aerostatic bearings. The effects of gap between the bearing and the guide way and the porosity of the porous material on the load capacity of the bearing were studied. The adequacy of the simulation model and the approach was verified. From the parametric study, it is found that the depth of the flow path does n...

This paper presents a numerical investigation on the influence of different types of damage to the load capacity of in-service timber utility poles. Current design codes do not highlight a pole’s strength performance due to different types of damage. However, damages typically found in ageing timber poles, such as damage due to fungus or termite attack, have very different characteristics and r...