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On impedance matching and bandwidth of compact antenna arrays

We analyze the impact of the matching network on compact MIMO systems. Existing studies have found that the matching network has a significant influence on the performance of multiple antenna systems when the antennas are in close proximity. However, none has examined the wideband case. In this paper, we investigate the wideband performance of four different matching networks for multiple dipole a

Scheduling of Event-Triggered Controllers on a Shared Network

We consider a system where a number of independent, time-triggered or event-triggered control loops are closed over a shared communication network. Each plant is described by a first-order linear stochastic system. In the event-triggered case, a sensor at each plant frequently samples the output but attempts to communicate only when the magnitude of the output is above a threshold. Once access to

Risk and gain sharing challenges in interorganisational implementation of RFID technology

Purpose of this paper: This paper proposes a framework for identifying potential risk and gain sharing challenges related to implementing collaborative change initiatives in supply chains, and uses the framework to explore risk and gain sharing in implementing radio frequency identification (RFID) technology. Design/methodology/approach: The empirical investigation, based on case study research, i

Development and validation of an empirical equation to predict wet fabric skin surface temperature of thermal manikins

Thermal manikins are useful tools to study clothing comfort and environmental ergonomics. The simulation of sweating can be achieved by putting a highly wicking stretchable knit fabric “skin” on top of the manikin. However, the addition of such a fabric skin makes it difficult to accurately measure the skin surface temperature. Moreover, it takes considerable amount of time to measure the fabric s

Behaviour of Viscoelastic-Viscoplastic Spheres and Cylinders-Partly Plastic Vessels walls

The material model consists of a viscoelastic Burgers element and an additional viscoplastic Bingham element when the effective stress exceeds the yield stress. For partly plastic vessel walls, expressions are derived for the stress and strain state in pressurised or relaxation loaded thick-walled cylinders in plane strain and spheres. For the spherical problem, the material compressibility is acc